/* $Id$
This file is part of the HandBrake source code.
- Homepage: <http://handbrake.m0k.org/>.
+ Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License. */
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
#include "hb.h"
+#include "hbffmpeg.h"
#include "lang.h"
#include "a52dec/a52.h"
-
-#include <string.h>
+#include "mp4v2/mp4v2.h"
#define min(a, b) a < b ? a : b
-typedef enum { hb_stream_type_unknown = 0, hb_stream_type_transport, hb_stream_type_program } hb_stream_type_t;
-
-#define kMaxNumberDecodeStreams 8
-#define kMaxNumberVideoPIDS 16
-#define kMaxNumberAudioPIDS 16
-//#define kVideoStream 0
-//#define kAudioStream 1
-#define kNumDecodeBuffers 2
+/*
+ * This table defines how ISO MPEG stream type codes map to HandBrake
+ * codecs. It is indexed by the 8 bit stream type and contains the codec
+ * worker object id and a parameter for that worker proc (ignored except
+ * for the ffmpeg-based codecs in which case it is the ffmpeg codec id).
+ *
+ * Entries with a worker proc id of 0 or a kind of 'U' indicate that HB
+ * doesn't handle the stream type.
+ * N - Not used
+ * U - Unknown (to be determined by further processing)
+ * A - Audio
+ * V - Video
+ * P - PCR
+ */
+typedef enum { N, U, A, V, P } kind_t;
+typedef struct {
+ kind_t kind; /* not handled / unknown / audio / video */
+ int codec; /* HB worker object id of codec */
+ int codec_param; /* param for codec (usually ffmpeg codec id) */
+ const char* name; /* description of type */
+} stream2codec_t;
+
+#define st(id, kind, codec, codec_param, name) \
+ [id] = { kind, codec, codec_param, name }
+
+static const stream2codec_t st2codec[256] = {
+ st(0x01, V, WORK_DECMPEG2, 0, "MPEG1"),
+ st(0x02, V, WORK_DECMPEG2, 0, "MPEG2"),
+ st(0x03, A, HB_ACODEC_MPGA, CODEC_ID_MP2, "MPEG1"),
+ st(0x04, A, HB_ACODEC_MPGA, CODEC_ID_MP2, "MPEG2"),
+ st(0x05, N, 0, 0, "ISO 13818-1 private section"),
+ st(0x06, U, 0, 0, "ISO 13818-1 PES private data"),
+ st(0x07, N, 0, 0, "ISO 13522 MHEG"),
+ st(0x08, N, 0, 0, "ISO 13818-1 DSM-CC"),
+ st(0x09, N, 0, 0, "ISO 13818-1 auxiliary"),
+ st(0x0a, N, 0, 0, "ISO 13818-6 encap"),
+ st(0x0b, N, 0, 0, "ISO 13818-6 DSM-CC U-N msgs"),
+ st(0x0c, N, 0, 0, "ISO 13818-6 Stream descriptors"),
+ st(0x0d, N, 0, 0, "ISO 13818-6 Sections"),
+ st(0x0e, N, 0, 0, "ISO 13818-1 auxiliary"),
+ st(0x0f, A, HB_ACODEC_MPGA, CODEC_ID_AAC, "ISO 13818-7 AAC Audio"),
+ st(0x10, V, WORK_DECAVCODECV, CODEC_ID_MPEG4, "MPEG4"),
+ st(0x11, A, HB_ACODEC_MPGA, CODEC_ID_AAC_LATM, "MPEG4 LATM AAC"),
+ st(0x12, U, 0, 0, "MPEG4 generic"),
+
+ st(0x14, N, 0, 0, "ISO 13818-6 DSM-CC download"),
+
+ st(0x1b, V, WORK_DECAVCODECV, CODEC_ID_H264, "H.264"),
+
+ st(0x80, N, HB_ACODEC_MPGA, CODEC_ID_PCM_BLURAY, "DigiCipher II Video"),
+ st(0x81, A, HB_ACODEC_AC3, 0, "AC-3"),
+ st(0x82, A, HB_ACODEC_DCA, 0, "HDMV DTS"),
+ st(0x83, A, HB_ACODEC_LPCM, 0, "LPCM/TrueHD"),
+ st(0x84, A, 0, 0, "SDDS/EAC3"),
+ st(0x85, U, 0, 0, "ATSC Program ID"),
+ st(0x86, A, HB_ACODEC_DCA, 0, "DTS-HD"),
+ st(0x87, A, HB_ACODEC_MPGA, CODEC_ID_EAC3, "EAC3"),
+
+ st(0x8a, A, HB_ACODEC_DCA, 0, "DTS"),
+
+ st(0x91, A, HB_ACODEC_AC3, 0, "AC-3"),
+ st(0x92, N, 0, 0, "Subtitle"),
+
+ st(0x94, A, 0, 0, "SDDS"),
+ st(0xa0, V, 0, 0, "MSCODEC"),
+
+ st(0xea, V, WORK_DECAVCODECV, CODEC_ID_VC1, "VC1"),
+};
+#undef st
+
+typedef enum {
+ hb_stream_type_unknown = 0,
+ transport,
+ program,
+ dvd_program,
+ ffmpeg
+} hb_stream_type_t;
+
+#define kMaxNumberDecodeStreams 32
#define kMaxNumberPMTStreams 32
-#define CLOCKRATE ((int64_t)27000000) // MPEG System clock rate
-#define STREAMRATE ((int64_t)2401587) // Original HD stream rate 19.2 Mbps
-#define DEMUX (((int)STREAMRATE * 8) / 50)// Demux value for HD content STREAMRATE / 50
struct hb_stream_s
{
- char * path;
- FILE * file_handle;
- hb_stream_type_t stream_type;
-
- int ps_current_write_buffer_index;
- int ps_current_read_buffer_index;
-
- struct {
- int size;
- int len;
- int read_pos;
- int write_pos;
- unsigned char * data;
- } ps_decode_buffer[kNumDecodeBuffers];
-
- struct {
- int lang_code;
- int flags;
- int rate;
- int bitrate;
- } a52_info[kMaxNumberAudioPIDS];
-
- int ts_video_pids[kMaxNumberVideoPIDS];
- int ts_audio_pids[kMaxNumberAudioPIDS];
-
- int ts_number_video_pids;
- int ts_number_audio_pids;
-
- unsigned char* ts_packetbuf[kMaxNumberDecodeStreams];
- int ts_packetpos[kMaxNumberDecodeStreams];
-// int ts_bufpackets[kMaxNumberDecodeStreams];
- int ts_foundfirst[kMaxNumberDecodeStreams];
- int ts_skipbad[kMaxNumberDecodeStreams];
- int ts_streamcont[kMaxNumberDecodeStreams];
- int ts_streamid[kMaxNumberDecodeStreams];
- int ts_audio_stream_type[kMaxNumberAudioPIDS];
-
- struct
- {
- unsigned short program_number;
- unsigned short program_map_PID;
- } pat_info[kMaxNumberPMTStreams];
- int ts_number_pat_entries;
-
- struct
- {
- int reading;
- unsigned char *tablebuf;
- unsigned int tablepos;
- unsigned char current_continuity_counter;
-
- int section_length;
- int program_number;
- unsigned int PCR_PID;
- int program_info_length;
- unsigned char *progam_info_descriptor_data;
- struct
- {
- unsigned char stream_type;
- unsigned short elementary_PID;
- unsigned short ES_info_length;
- unsigned char *es_info_descriptor_data;
- } pmt_stream_info[kMaxNumberPMTStreams];
- } pmt_info;
+ int frames; /* video frames so far */
+ int errors; /* total errors so far */
+ int last_error_frame; /* frame # at last error message */
+ int last_error_count; /* # errors at last error message */
+ int packetsize; /* Transport Stream packet size */
+
+ uint8_t need_keyframe; // non-zero if want to start at a keyframe
+ uint8_t ts_found_pcr; // non-zero if we've found at least one input pcr
+ int ts_pcr_out; // sequence number of most recent output pcr
+ int ts_pcr_in; // sequence number of most recent input pcr
+ int64_t ts_pcr; // most recent input pcr
+ int64_t ts_pcrhist[4]; // circular buffer of output pcrs
+
+ uint8_t *ts_packet; /* buffer for one TS packet */
+ hb_buffer_t *ts_buf[kMaxNumberDecodeStreams];
+ int ts_pos[kMaxNumberDecodeStreams];
+ int8_t ts_skipbad[kMaxNumberDecodeStreams];
+ int8_t ts_streamcont[kMaxNumberDecodeStreams];
+ uint8_t ts_pkt_summary[kMaxNumberDecodeStreams][8];
+
+ hb_buffer_t *fwrite_buf; /* PS buffer (set by hb_ts_stream_decode) */
+
+ int chapter; /* Chapter that we are currently in */
+ int64_t chapter_end; /* HB time that the current chapter ends */
+
+ /*
+ * Stuff before this point is dynamic state updated as we read the
+ * stream. Stuff after this point is stream description state that
+ * we learn during the initial scan but cache so it can be
+ * reused during the conversion read.
+ */
+ uint8_t ts_number_pids;
+ uint8_t ts_flags; // stream characteristics:
+#define TS_HAS_PCR (1 << 0) // at least one PCR seen
+#define TS_HAS_RAP (1 << 1) // Random Access Point bit seen
+#define TS_HAS_RSEI (1 << 2) // "Restart point" SEI seen
+ uint8_t ts_IDRs; // # IDRs found during duration scan
+
+ int16_t ts_pids[kMaxNumberDecodeStreams];
+
+ uint32_t ts_format_id[kMaxNumberDecodeStreams];
+#define TS_FORMAT_ID_AC3 (('A' << 24) | ('C' << 16) | ('-' << 8) | '3')
+ uint8_t ts_stream_type[kMaxNumberDecodeStreams];
+ kind_t ts_stream_kind[kMaxNumberDecodeStreams];
+ uint8_t ts_multiplexed[kMaxNumberDecodeStreams];
+
+ char *path;
+ FILE *file_handle;
+ hb_stream_type_t hb_stream_type;
+ hb_title_t *title;
+
+ AVFormatContext *ffmpeg_ic;
+ AVPacket *ffmpeg_pkt;
+ double ffmpeg_tsconv[MAX_STREAMS];
+ uint8_t ffmpeg_video_id;
+
+ struct {
+ int lang_code;
+ int flags;
+ int rate;
+ int bitrate;
+ } a52_info[kMaxNumberDecodeStreams];
+
+ struct
+ {
+ unsigned short program_number;
+ unsigned short program_map_PID;
+ } pat_info[kMaxNumberPMTStreams];
+ int ts_number_pat_entries;
+
+ struct
+ {
+ int reading;
+ unsigned char *tablebuf;
+ unsigned int tablepos;
+ unsigned char current_continuity_counter;
+
+ int section_length;
+ int program_number;
+ unsigned int PCR_PID;
+ uint32_t reg_desc;
+ int program_info_length;
+ struct
+ {
+ unsigned char stream_type;
+ unsigned short elementary_PID;
+ unsigned short ES_info_length;
+ unsigned char *es_info_descriptor_data;
+ } pmt_stream_info[kMaxNumberPMTStreams];
+ } pmt_info;
};
/***********************************************************************
static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle);
static void hb_ts_stream_init(hb_stream_t *stream);
static void hb_ts_stream_find_pids(hb_stream_t *stream);
-static void hb_ts_stream_decode(hb_stream_t *stream);
+static int hb_ts_stream_decode(hb_stream_t *stream, hb_buffer_t *obuf);
static void hb_ts_stream_reset(hb_stream_t *stream);
-static void hb_stream_put_back(hb_stream_t *stream, int i);
static hb_audio_t *hb_ts_stream_set_audio_id_and_codec(hb_stream_t *stream,
- int aud_pid_index);
+ int idx);
static void hb_ps_stream_find_audio_ids(hb_stream_t *stream, hb_title_t *title);
-static off_t align_to_next_packet(FILE* f);
+static off_t align_to_next_packet(hb_stream_t *stream);
+
+static int ffmpeg_open( hb_stream_t *stream, hb_title_t *title );
+static void ffmpeg_close( hb_stream_t *d );
+static hb_title_t *ffmpeg_title_scan( hb_stream_t *stream );
+static int ffmpeg_read( hb_stream_t *stream, hb_buffer_t *buf );
+static int ffmpeg_seek( hb_stream_t *stream, float frac );
+static int ffmpeg_seek_ts( hb_stream_t *stream, int64_t ts );
/*
* streams have a bunch of state that's learned during the scan. We don't
* want to throw away the state when scan does a close then relearn
- * everything when reader does an open. So we basically ignore
- * a stream close, remember the most recent stream we've opened and only
- * delete it when a stream of a different name is opened.
+ * everything when reader does an open. So we save the stream state on
+ * the close following a scan and reuse it when 'reader' does an open.
+ */
+static hb_list_t *stream_state_list;
+
+static hb_stream_t *hb_stream_lookup( const char *path )
+{
+ if ( stream_state_list == NULL )
+ return NULL;
+
+ hb_stream_t *ss;
+ int i = 0;
+
+ while ( ( ss = hb_list_item( stream_state_list, i++ ) ) != NULL )
+ {
+ if ( strcmp( path, ss->path ) == 0 )
+ {
+ break;
+ }
+ }
+ return ss;
+}
+
+static void hb_stream_state_delete( hb_stream_t *ss )
+{
+ hb_list_rem( stream_state_list, ss );
+ free( ss->path );
+ free( ss );
+}
+
+/*
+ * logging routines.
+ * these frontend hb_log because transport streams can have a lot of errors
+ * so we want to rate limit messages. this routine limits the number of
+ * messages to at most one per minute of video. other errors that occur
+ * during the minute are counted & the count is output with the next
+ * error msg we print.
*/
-static hb_stream_t *current_stream;
+static void ts_warn_helper( hb_stream_t *stream, char *log, va_list args )
+{
+ // limit error printing to at most one per minute of video (at 30fps)
+ ++stream->errors;
+ if ( stream->frames - stream->last_error_frame >= 30*60 )
+ {
+ char msg[256];
+
+ vsnprintf( msg, sizeof(msg), log, args );
+
+ if ( stream->errors - stream->last_error_count < 10 )
+ {
+ hb_log( "stream: error near frame %d: %s", stream->frames, msg );
+ }
+ else
+ {
+ int Edelta = stream->errors - stream->last_error_count;
+ double Epcnt = (double)Edelta * 100. /
+ (stream->frames - stream->last_error_frame);
+ hb_log( "stream: %d new errors (%.0f%%) up to frame %d: %s",
+ Edelta, Epcnt, stream->frames, msg );
+ }
+ stream->last_error_frame = stream->frames;
+ stream->last_error_count = stream->errors;
+ }
+}
+
+static void ts_warn( hb_stream_t*, char*, ... ) HB_WPRINTF(2,3);
+static void ts_err( hb_stream_t*, int, char*, ... ) HB_WPRINTF(3,4);
+
+static void ts_warn( hb_stream_t *stream, char *log, ... )
+{
+ va_list args;
+ va_start( args, log );
+ ts_warn_helper( stream, log, args );
+ va_end( args );
+}
+
+static kind_t ts_stream_kind( hb_stream_t *stream, int curstream )
+{
+ return st2codec[stream->ts_stream_type[curstream]].kind;
+}
+static int index_of_pid(hb_stream_t *stream, int pid)
+{
+ int i;
+
+ for ( i = 0; i < stream->ts_number_pids; ++i )
+ if ( pid == stream->ts_pids[i] )
+ return i;
+
+ return -1;
+}
+
+static int index_of_video(hb_stream_t *stream)
+{
+ int i;
-static inline int check_ps_sync(const uint8_t *buf)
+ for ( i = 0; i < stream->ts_number_pids; ++i )
+ if ( V == stream->ts_stream_kind[i] )
+ return i;
+
+ return -1;
+}
+
+static void ts_err( hb_stream_t *stream, int curstream, char *log, ... )
+{
+ va_list args;
+ va_start( args, log );
+ ts_warn_helper( stream, log, args );
+ va_end( args );
+
+ stream->ts_skipbad[curstream] = 1;
+ stream->ts_pos[curstream] = 0;
+ stream->ts_streamcont[curstream] = -1;
+}
+
+static int check_ps_sync(const uint8_t *buf)
{
// a legal MPEG program stream must start with a Pack header in the
// first four bytes.
(buf[2] == 0x01) && (buf[3] == 0xba);
}
-static inline int check_ts_sync(const uint8_t *buf)
+static int check_ps_sc(const uint8_t *buf)
+{
+ // a legal MPEG program stream must start with a Pack followed by a
+ // some other start code. If we've already verified the pack, this skip
+ // it and checks for a start code prefix.
+ int pos = 14 + ( buf[13] & 0x7 ); // skip over the PACK
+ return (buf[pos+0] == 0x00) && (buf[pos+1] == 0x00) && (buf[pos+2] == 0x01);
+}
+
+static int check_ts_sync(const uint8_t *buf)
{
// must have initial sync byte, no scrambling & a legal adaptation ctrl
return (buf[0] == 0x47) && ((buf[3] >> 6) == 0) && ((buf[3] >> 4) > 0);
}
-static inline int have_ts_sync(const uint8_t *buf)
+static int have_ts_sync(const uint8_t *buf, int psize)
{
- return check_ts_sync(&buf[0*188]) && check_ts_sync(&buf[1*188]) &&
- check_ts_sync(&buf[2*188]) && check_ts_sync(&buf[3*188]) &&
- check_ts_sync(&buf[4*188]) && check_ts_sync(&buf[5*188]) &&
- check_ts_sync(&buf[6*188]) && check_ts_sync(&buf[7*188]);
+ return check_ts_sync(&buf[0*psize]) && check_ts_sync(&buf[1*psize]) &&
+ check_ts_sync(&buf[2*psize]) && check_ts_sync(&buf[3*psize]) &&
+ check_ts_sync(&buf[4*psize]) && check_ts_sync(&buf[5*psize]) &&
+ check_ts_sync(&buf[6*psize]) && check_ts_sync(&buf[7*psize]);
}
static int hb_stream_check_for_ts(const uint8_t *buf)
{
// transport streams should have a sync byte every 188 bytes.
- // search the first KB of buf looking for at least 8 consecutive
+ // search the first 8KB of buf looking for at least 8 consecutive
// correctly located sync patterns.
int offset = 0;
- for ( offset = 0; offset < 1024; ++offset )
+ for ( offset = 0; offset < 8*1024-8*188; ++offset )
{
- if ( have_ts_sync( &buf[offset]) )
- return 1;
+ if ( have_ts_sync( &buf[offset], 188) )
+ return 188 | (offset << 8);
+ if ( have_ts_sync( &buf[offset], 192) )
+ return 192 | (offset << 8);
+ if ( have_ts_sync( &buf[offset], 204) )
+ return 204 | (offset << 8);
+ if ( have_ts_sync( &buf[offset], 208) )
+ return 208 | (offset << 8);
+ }
+ return 0;
+}
+
+static int hb_stream_check_for_ps(hb_stream_t *stream)
+{
+ uint8_t buf[2048*4];
+ uint8_t sc_buf[4];
+ int pos = 0;
+ int hits = 0;
+
+ fseek(stream->file_handle, 0, SEEK_SET);
+
+ // program streams should start with a PACK then some other mpeg start
+ // code (usually a SYS but that might be missing if we only have a clip).
+ while (pos < 512 * 1024)
+ {
+ int offset;
+
+ if ( fread(buf, 1, sizeof(buf), stream->file_handle) != sizeof(buf) )
+ return 0;
+
+ for ( offset = 0; offset < 8*1024-27; ++offset )
+ {
+ if ( check_ps_sync( &buf[offset] ) && check_ps_sc( &buf[offset] ) )
+ {
+ int pes_offset, prev, data_len;
+ uint8_t sid;
+
+ if ( ++hits == 3 )
+ return 1;
+ pes_offset = 14 + (buf[13] & 0x7);
+ sid = buf[pes_offset+3];
+ data_len = (buf[pes_offset+4] << 8) + buf[pes_offset+5];
+ if ( data_len && sid > 0xba && sid < 0xf9 )
+ {
+ prev = ftell( stream->file_handle );
+ pos = pes_offset + 6 + data_len + prev;
+ fseek( stream->file_handle, pos, SEEK_SET );
+ if ( fread(sc_buf, 1, 4, stream->file_handle) != 4 )
+ return 0;
+ if (sc_buf[0] == 0x00 && sc_buf[1] == 0x00 &&
+ sc_buf[2] == 0x01)
+ {
+ return 1;
+ }
+ fseek( stream->file_handle, prev, SEEK_SET );
+ }
+ }
+ }
+ fseek( stream->file_handle, -27, SEEK_CUR );
+ pos = ftell( stream->file_handle );
}
return 0;
}
-static int hb_stream_check_for_ps(const uint8_t *buf)
+static int hb_stream_check_for_dvd_ps(const uint8_t *buf)
{
- // program streams should have a Pack header every 2048 bytes.
- // check that we have 4 of these.
+ // DVD program streams should have a Pack header every 2048 bytes.
+ // check that we have 4 of these in a row.
return check_ps_sync(&buf[0*2048]) && check_ps_sync(&buf[1*2048]) &&
check_ps_sync(&buf[2*2048]) && check_ps_sync(&buf[3*2048]);
}
if ( fread(buf, 1, sizeof(buf), stream->file_handle) == sizeof(buf) )
{
- if ( hb_stream_check_for_ts(buf) != 0 )
+ int psize;
+ if ( ( psize = hb_stream_check_for_ts(buf) ) != 0 )
{
- hb_log("file is MPEG Transport Stream");
- stream->stream_type = hb_stream_type_transport;
+ int offset = psize >> 8;
+ psize &= 0xff;
+ hb_log("file is MPEG Transport Stream with %d byte packets"
+ " offset %d bytes", psize, offset);
+ stream->packetsize = psize;
+ stream->hb_stream_type = transport;
hb_ts_stream_init(stream);
+ if ( index_of_video( stream ) < 0 )
+ {
+ return 0;
+ }
return 1;
}
- if ( hb_stream_check_for_ps(buf) != 0 )
+ if ( hb_stream_check_for_dvd_ps(buf) != 0 )
+ {
+ hb_log("file is MPEG DVD Program Stream");
+ stream->hb_stream_type = dvd_program;
+ return 1;
+ }
+ if ( hb_stream_check_for_ps(stream) != 0 )
{
hb_log("file is MPEG Program Stream");
- stream->stream_type = hb_stream_type_program;
+ stream->hb_stream_type = program;
return 1;
}
}
return 0;
}
-static void hb_stream_delete( hb_stream_t ** _d )
+static void hb_stream_delete_dynamic( hb_stream_t *d )
{
- hb_stream_t * d = *_d;
-
if( d->file_handle )
{
fclose( d->file_handle );
- d->file_handle = NULL;
- }
-
- int i=0;
- for (i = 0; i < kNumDecodeBuffers; i++)
- {
- if (d->ps_decode_buffer[i].data)
- {
- free(d->ps_decode_buffer[i].data);
- d->ps_decode_buffer[i].data = NULL;
- }
- }
-
- for (i = 0; i < kMaxNumberDecodeStreams; i++)
- {
- if (d->ts_packetbuf[i])
- {
- free(d->ts_packetbuf[i]);
- d->ts_packetbuf[i] = NULL;
- }
- }
+ d->file_handle = NULL;
+ }
+
+ int i=0;
+
+ if ( d->ts_packet )
+ {
+ free( d->ts_packet );
+ d->ts_packet = NULL;
+ }
+ for (i = 0; i < kMaxNumberDecodeStreams; i++)
+ {
+ if (d->ts_buf[i])
+ {
+ hb_buffer_close(&(d->ts_buf[i]));
+ d->ts_buf[i] = NULL;
+ }
+ }
+}
+
+static void hb_stream_delete( hb_stream_t *d )
+{
+ hb_stream_delete_dynamic( d );
free( d->path );
free( d );
- *_d = NULL;
+}
+
+static int audio_inactive( hb_stream_t *stream, int idx )
+{
+ int pid = stream->ts_pids[idx];
+
+ if ( pid < 0 )
+ {
+ // PID declared inactive by hb_stream_title_scan
+ return 1;
+ }
+ if ( pid == stream->pmt_info.PCR_PID )
+ {
+ // PCR PID is always active
+ return 0;
+ }
+
+ // see if we should make the stream inactive because scan.c didn't
+ // find a valid audio bitstream.
+ int i;
+ for ( i = 0; i < hb_list_count( stream->title->list_audio ); ++i )
+ {
+ hb_audio_t *audio = hb_list_item( stream->title->list_audio, i );
+ if ( audio->id == pid )
+ {
+ return 0;
+ }
+ }
+
+ // not in the title's audio list - declare the PID inactive
+ stream->ts_pids[idx] = -stream->ts_pids[idx];
+ return 1;
}
/***********************************************************************
***********************************************************************
*
**********************************************************************/
-hb_stream_t * hb_stream_open( char * path )
+hb_stream_t * hb_stream_open( char *path, hb_title_t *title )
{
- if (current_stream)
+ FILE *f = fopen( path, "rb" );
+ if ( f == NULL )
{
- if (strcmp( path, current_stream->path ) == 0 )
- {
- hb_stream_seek( current_stream, 0. );
- return current_stream;
- }
- hb_stream_delete( ¤t_stream );
+ hb_log( "hb_stream_open: open %s failed", path );
+ return NULL;
}
+
hb_stream_t *d = calloc( sizeof( hb_stream_t ), 1 );
+ if ( d == NULL )
+ {
+ fclose( f );
+ hb_log( "hb_stream_open: can't allocate space for %s stream state", path );
+ return NULL;
+ }
- /* open the file and see if it's a type we know about. return a stream
- * reference structure if we can deal with it & NULL otherwise. */
- if( ( d->file_handle = fopen( path, "rb" ) ) )
+ /*
+ * if we're opening the stream to read & convert, we need
+ * the state we saved when we scanned the stream. if we're
+ * opening the stream to scan it we want to rebuild the state
+ * (even if we have saved state, the stream may have changed).
+ */
+ hb_stream_t *ss = hb_stream_lookup( path );
+ if ( title && ss && ss->hb_stream_type != ffmpeg )
{
+ /*
+ * copy the saved state since we might be encoding the same stream
+ * multiple times.
+ */
+ memcpy( d, ss, sizeof(*d) );
+ d->file_handle = f;
+ d->title = title;
d->path = strdup( path );
- if (d->path != NULL && hb_stream_get_type( d ) != 0 )
+
+ if ( d->hb_stream_type == transport )
+ {
+ d->ts_packet = malloc( d->packetsize );
+
+ int i;
+ for ( i = 0; i < d->ts_number_pids; i++)
+ {
+ if ( d->ts_stream_kind[i] == A &&
+ audio_inactive( d, i ) )
+ {
+ // this PID isn't wanted (we don't have a codec for it
+ // or scan didn't find audio parameters)
+ continue;
+ }
+ d->ts_buf[i] = hb_buffer_init(d->packetsize);
+ d->ts_buf[i]->size = 0;
+ }
+ hb_stream_seek( d, 0. );
+ }
+ return d;
+ }
+
+ /*
+ * opening for scan - delete any saved state then (re)scan the stream.
+ * If it's something we can deal with (MPEG2 PS or TS) return a stream
+ * reference structure & null otherwise.
+ */
+ if ( ss != NULL )
+ {
+ hb_stream_state_delete( ss );
+ }
+ d->file_handle = f;
+ d->title = title;
+ d->path = strdup( path );
+ if (d->path != NULL )
+ {
+ if ( hb_stream_get_type( d ) != 0 )
+ {
+ return d;
+ }
+ fclose( d->file_handle );
+ d->file_handle = NULL;
+ if ( ffmpeg_open( d, title ) )
{
- current_stream = d;
return d;
}
+ }
+ if ( d->file_handle )
+ {
fclose( d->file_handle );
- if (d->path)
- free( d->path );
+ }
+ if (d->path)
+ {
+ free( d->path );
}
hb_log( "hb_stream_open: open %s failed", path );
free( d );
return NULL;
}
+hb_stream_t * hb_bd_stream_open( hb_title_t *title )
+{
+ int ii;
+
+ hb_stream_t *d = calloc( sizeof( hb_stream_t ), 1 );
+ if ( d == NULL )
+ {
+ hb_log( "hb_bd_stream_open: can't allocate space for stream state" );
+ return NULL;
+ }
+
+ for (ii = 0; ii < kMaxNumberDecodeStreams; ii++)
+ {
+ d->ts_streamcont[ii] = -1;
+ d->ts_pids[ii] = -1;
+ }
+
+ d->file_handle = NULL;
+ d->title = title;
+ d->path = NULL;
+ d->ts_packet = NULL;
+
+ d->ts_number_pids = 0;
+ d->ts_pids[0] = title->video_id;
+ d->ts_stream_type[0] = title->video_stream_type;
+ d->ts_stream_kind[0] = V;
+ d->ts_number_pids++;
+
+ hb_audio_t * audio;
+ for ( ii = 0; ( audio = hb_list_item( title->list_audio, ii ) ); ++ii )
+ {
+ d->ts_pids[d->ts_number_pids] = audio->id;
+ d->ts_stream_type[d->ts_number_pids] = audio->config.in.stream_type;
+ d->ts_stream_kind[d->ts_number_pids] = A;
+
+ if ( d->ts_stream_type[d->ts_number_pids] == 0x83 &&
+ title->reg_desc == STR4_TO_UINT32("HDMV") )
+ {
+ // This is an interleaved TrueHD/AC-3 stream and the esid of
+ // the AC-3 is 0x76
+ d->ts_multiplexed[d->ts_number_pids] = 0x76;
+ d->ts_stream_type[d->ts_number_pids] = 0x81;
+ }
+ if ( d->ts_stream_type[d->ts_number_pids] == 0x86 &&
+ title->reg_desc == STR4_TO_UINT32("HDMV") )
+ {
+ // This is an interleaved DTS-HD/DTS stream and the esid of
+ // the DTS is 0x71
+ d->ts_multiplexed[d->ts_number_pids] = 0x71;
+ d->ts_stream_type[d->ts_number_pids] = 0x82;
+ }
+ if ( d->ts_stream_type[d->ts_number_pids] == 0x84 &&
+ title->reg_desc == STR4_TO_UINT32("HDMV") )
+ {
+ // EAC3 audio in bluray has an stype of 0x84
+ // which conflicts with SDDS
+ // To distinguish, Bluray streams have a reg_desc of HDMV
+ d->ts_stream_type[d->ts_number_pids] = 0x87;
+ }
+
+ d->ts_number_pids++;
+ }
+
+ d->ts_flags = TS_HAS_RAP;
+ // When scanning, title->job == NULL. We don't need to wait for
+ // a PCR when scanning. In fact, it trips us up on the first
+ // preview of every title since we would have to read quite a
+ // lot of data before finding the PCR.
+ if (title->pcr_pid != 0xFFFF && title->job)
+ {
+ if ( index_of_pid( d, title->pcr_pid ) < 0 )
+ {
+ // BD PCR PID is specified to always be 0x1001
+ d->ts_pids[d->ts_number_pids] = 0x1001;
+ d->ts_stream_kind[d->ts_number_pids] = P;
+ d->ts_number_pids++;
+ }
+ }
+
+ d->packetsize = 192;
+ d->hb_stream_type = transport;
+
+ for ( ii = 0; ii < d->ts_number_pids; ii++ )
+ {
+ d->ts_buf[ii] = hb_buffer_init(d->packetsize);
+ d->ts_buf[ii]->size = 0;
+ }
+
+ return d;
+}
+
/***********************************************************************
* hb_stream_close
***********************************************************************
**********************************************************************/
void hb_stream_close( hb_stream_t ** _d )
{
+ hb_stream_t *stream = * _d;
+
+ if ( stream->hb_stream_type == ffmpeg )
+ {
+ ffmpeg_close( stream );
+ hb_stream_delete( stream );
+ *_d = NULL;
+ return;
+ }
+
+ if ( stream->frames )
+ {
+ hb_log( "stream: %d good frames, %d errors (%.0f%%)", stream->frames,
+ stream->errors, (double)stream->errors * 100. /
+ (double)stream->frames );
+ }
+
+ /*
+ * if the stream was opened for a scan, cache the result, otherwise delete
+ * the state.
+ */
+ if ( stream->title == NULL )
+ {
+ hb_stream_delete_dynamic( stream );
+ if ( stream_state_list == NULL )
+ {
+ stream_state_list = hb_list_init();
+ }
+ hb_list_add( stream_state_list, stream );
+ }
+ else
+ {
+ hb_stream_delete( stream );
+ }
+ *_d = NULL;
}
/* when the file was first opened we made entries for all the audio elementary
* now have an audio codec, type, rate, etc., associated with them. At the end
* of the scan we delete all the audio entries that weren't found by the scan
* or don't have a format we support. This routine deletes audio entry 'indx'
- * by copying all later entries down one slot. */
-static void hb_stream_delete_audio_entry(hb_stream_t *stream, int indx)
+ * by setting its PID to an invalid value so no packet will match it. (We can't
+ * move any of the entries since the index of the entry is used as the id
+ * of the media stream for HB. */
+static void hb_stream_delete_entry(hb_stream_t *stream, int indx)
{
- int i;
-
- for (i = indx+1; i < stream->ts_number_audio_pids; ++i)
+ if ( stream->ts_pids[indx] > 0 )
{
- stream->ts_audio_pids[indx] = stream->ts_audio_pids[i];
- stream->ts_audio_stream_type[indx] = stream->ts_audio_stream_type[i];
- stream->ts_streamid[stream->ts_number_video_pids + indx] =
- stream->ts_streamid[stream->ts_number_video_pids + i];
- ++indx;
+ stream->ts_pids[indx] = -stream->ts_pids[indx];
}
- --stream->ts_number_audio_pids;
}
/***********************************************************************
**********************************************************************/
hb_title_t * hb_stream_title_scan(hb_stream_t *stream)
{
+ if ( stream->hb_stream_type == ffmpeg )
+ return ffmpeg_title_scan( stream );
+
// 'Barebones Title'
hb_title_t *aTitle = hb_title_init( stream->path, 0 );
+ aTitle->type = HB_STREAM_TYPE;
aTitle->index = 1;
- // Copy part of the stream path to the title name
- char *sep = strrchr(stream->path, '/');
- if (sep)
- strcpy(aTitle->name, sep+1);
- char *dot_term = strrchr(aTitle->name, '.');
- if (dot_term)
- *dot_term = '\0';
-
+ // Copy part of the stream path to the title name
+ char *sep = strrchr(stream->path, '/');
+ if (sep)
+ strcpy(aTitle->name, sep+1);
+ char *dot_term = strrchr(aTitle->name, '.');
+ if (dot_term)
+ *dot_term = '\0';
+
// Height, width, rate and aspect ratio information is filled in when the previews are built
hb_stream_duration(stream, aTitle);
-
+
// One Chapter
hb_chapter_t * chapter;
chapter = calloc( sizeof( hb_chapter_t ), 1 );
chapter->minutes = aTitle->minutes;
chapter->seconds = aTitle->seconds;
hb_list_add( aTitle->list_chapter, chapter );
-
+
// Figure out how many audio streams we really have:
// - For transport streams, for each PID listed in the PMT (whether
// or not it was an audio stream type) read the bitstream until we
// the elementary stream is an audio type.
// - For program streams read the first 4MB and take every unique
// audio stream we find.
- if (stream->stream_type == hb_stream_type_transport)
- {
+ if (stream->hb_stream_type == transport)
+ {
int i;
- for (i=0; i < stream->ts_number_audio_pids; i++)
+ for (i=0; i < stream->ts_number_pids; i++)
{
hb_audio_t *audio = hb_ts_stream_set_audio_id_and_codec(stream, i);
- if (audio->codec)
+ if ( audio )
+ {
hb_list_add( aTitle->list_audio, audio );
- else
+ }
+ }
+
+ // make sure we're grabbing the PCR PID
+ if ( index_of_pid( stream, stream->pmt_info.PCR_PID ) < 0 )
+ {
+ stream->ts_pids[stream->ts_number_pids] = stream->pmt_info.PCR_PID;
+ stream->ts_stream_kind[stream->ts_number_pids] = P;
+ stream->ts_number_pids++;
+ }
+
+ for (i = 0; i < stream->ts_number_pids; i++)
+ {
+ kind_t kind = stream->ts_stream_kind[i];
+
+ if ( kind == N || kind == U )
{
- free(audio);
- hb_stream_delete_audio_entry(stream, i);
- --i;
+ hb_stream_delete_entry(stream, i);
}
}
- }
+
+ // set the video id, codec & muxer
+ int idx = index_of_video( stream );
+ if ( idx < 0 )
+ {
+ hb_title_close( &aTitle );
+ return NULL;
+ }
+
+ aTitle->video_id = stream->ts_pids[idx];
+ aTitle->video_codec = st2codec[stream->ts_stream_type[idx]].codec;
+ aTitle->video_codec_param = st2codec[stream->ts_stream_type[idx]].codec_param;
+ aTitle->demuxer = HB_MPEG2_TS_DEMUXER;
+
+ if ( ( stream->ts_flags & TS_HAS_PCR ) == 0 )
+ {
+ hb_log( "transport stream missing PCRs - using video DTS instead" );
+ }
+
+ if ( stream->ts_IDRs < 1 )
+ {
+ hb_log( "transport stream doesn't seem to have video IDR frames" );
+ aTitle->flags |= HBTF_NO_IDR;
+ }
+ }
else
{
hb_ps_stream_find_audio_ids(stream, aTitle);
}
- return aTitle;
+ return aTitle;
}
/*
- * scan the next MB of 'stream' to find the next start packet for
- * the Packetized Elementary Stream associated with TS PID 'pid'.
+ * read the next transport stream packet from 'stream'. Return NULL if
+ * we hit eof & a pointer to the sync byte otherwise.
*/
-static const uint8_t *hb_ts_stream_getPEStype(hb_stream_t *stream, uint32_t pid)
+static const uint8_t *next_packet( hb_stream_t *stream )
{
- static uint8_t buf[188];
- int npack = 100000; // max packets to read
+ uint8_t *buf = stream->ts_packet + stream->packetsize - 188;
- while (--npack >= 0)
+ while ( 1 )
{
- if (fread(buf, 1, 188, stream->file_handle) != 188)
+ if ( fread(stream->ts_packet, 1, stream->packetsize, stream->file_handle) !=
+ stream->packetsize )
{
- hb_log("hb_ts_stream_getPEStype: EOF while searching for PID 0x%x", pid);
- return 0;
+ return NULL;
}
- if (buf[0] != 0x47)
+ if (buf[0] == 0x47)
{
- hb_log("hb_ts_stream_getPEStype: lost sync while searching for PID 0x%x", pid);
- align_to_next_packet(stream->file_handle);
- continue;
+ return buf;
}
-
- /*
- * The PES header is only in TS packets with 'start' set so we check
- * that first then check for the right PID.
- */
- if ((buf[1] & 0x40) == 0 || (buf[1] & 0x1f) != (pid >> 8) ||
- buf[2] != (pid & 0xff))
+ // lost sync - back up to where we started then try to re-establish.
+ off_t pos = ftello(stream->file_handle) - stream->packetsize;
+ off_t pos2 = align_to_next_packet(stream);
+ if ( pos2 == 0 )
{
- // not a start packet or not the pid we want
- continue;
+ hb_log( "next_packet: eof while re-establishing sync @ %"PRId64, pos );
+ return NULL;
}
+ ts_warn( stream, "next_packet: sync lost @ %"PRId64", regained after %"PRId64" bytes",
+ pos, pos2 );
+ }
+}
- /* skip over the TS hdr to return a pointer to the PES hdr */
- int udata = 4;
- switch (buf[3] & 0x30)
- {
- case 0x00: // illegal
- case 0x20: // fill packet
- continue;
+/*
+ * skip to the start of the next PACK header in program stream src_stream.
+ */
+static void skip_to_next_pack( hb_stream_t *src_stream )
+{
+ // scan forward until we find the start of the next pack
+ uint32_t strt_code = -1;
+ int c;
- case 0x30: // adaptation
+ flockfile( src_stream->file_handle );
+ while ( ( c = getc_unlocked( src_stream->file_handle ) ) != EOF )
+ {
+ strt_code = ( strt_code << 8 ) | c;
+ if ( strt_code == 0x000001ba )
+ // we found the start of the next pack
+ break;
+ }
+ funlockfile( src_stream->file_handle );
+
+ // if we didn't terminate on an eof back up so the next read
+ // starts on the pack boundary.
+ if ( c != EOF )
+ {
+ fseeko( src_stream->file_handle, -4, SEEK_CUR );
+ }
+}
+
+static int isIframe( hb_stream_t *stream, const uint8_t *buf, int adapt_len )
+{
+ // For mpeg2: look for a gop start or i-frame picture start
+ // for h.264: look for idr nal type or a slice header for an i-frame
+ // for vc1: look for a Sequence header
+ int i;
+ uint32_t strid = 0;
+
+
+ if ( stream->ts_stream_type[0] <= 2 )
+ {
+ // This section of the code handles MPEG-1 and MPEG-2 video streams
+ for (i = 13 + adapt_len; i < 188; i++)
+ {
+ strid = (strid << 8) | buf[i];
+ if ( ( strid >> 8 ) == 1 )
+ {
+ // we found a start code
+ uint8_t id = strid;
+ switch ( id )
+ {
+ case 0xB8: // group_start_code (GOP header)
+ case 0xB3: // sequence_header code
+ return 1;
+
+ case 0x00: // picture_start_code
+ // picture_header, let's see if it's an I-frame
+ if (i<185)
+ {
+ // check if picture_coding_type == 1
+ if ((buf[i+2] & (0x7 << 3)) == (1 << 3))
+ {
+ // found an I-frame picture
+ return 1;
+ }
+ }
+ break;
+ }
+ }
+ }
+ // didn't find an I-frame
+ return 0;
+ }
+ if ( stream->ts_stream_type[0] == 0x1b )
+ {
+ // we have an h.264 stream
+ for (i = 13 + adapt_len; i < 188; i++)
+ {
+ strid = (strid << 8) | buf[i];
+ if ( ( strid >> 8 ) == 1 )
+ {
+ // we found a start code - remove the ref_idc from the nal type
+ uint8_t nal_type = strid & 0x1f;
+ if ( nal_type == 0x05 )
+ // h.264 IDR picture start
+ return 1;
+ }
+ }
+ // didn't find an I-frame
+ return 0;
+ }
+ if ( stream->ts_stream_type[0] == 0xea )
+ {
+ // we have an vc1 stream
+ for (i = 13 + adapt_len; i < 188; i++)
+ {
+ strid = (strid << 8) | buf[i];
+ if ( strid == 0x10f )
+ {
+ // the ffmpeg vc1 decoder requires a seq hdr code in the first
+ // frame.
+ return 1;
+ }
+ }
+ // didn't find an I-frame
+ return 0;
+ }
+
+ // we don't understand the stream type so just say "yes" otherwise
+ // we'll discard all the video.
+ return 1;
+}
+
+/*
+ * scan the next MB of 'stream' to find the next start packet for
+ * the Packetized Elementary Stream associated with TS PID 'pid'.
+ */
+static const uint8_t *hb_ts_stream_getPEStype(hb_stream_t *stream, uint32_t pid)
+{
+ int npack = 300000; // max packets to read
+
+ while (--npack >= 0)
+ {
+ const uint8_t *buf = next_packet( stream );
+ if ( buf == NULL )
+ {
+ hb_log("hb_ts_stream_getPEStype: EOF while searching for PID 0x%x", pid);
+ return 0;
+ }
+
+ // while we're reading the stream, check if it has valid PCRs
+ // and/or random access points.
+ uint32_t pack_pid = ( (buf[1] & 0x1f) << 8 ) | buf[2];
+ if ( pack_pid == stream->pmt_info.PCR_PID )
+ {
+ if ( ( buf[5] & 0x10 ) &&
+ ( ( ( buf[3] & 0x30 ) == 0x20 ) ||
+ ( ( buf[3] & 0x30 ) == 0x30 && buf[4] > 6 ) ) )
+ {
+ stream->ts_flags |= TS_HAS_PCR;
+ }
+ }
+ if ( buf[5] & 0x40 )
+ {
+ stream->ts_flags |= TS_HAS_RAP;
+ }
+
+ /*
+ * The PES header is only in TS packets with 'start' set so we check
+ * that first then check for the right PID.
+ */
+ if ((buf[1] & 0x40) == 0 || pack_pid != pid )
+ {
+ // not a start packet or not the pid we want
+ continue;
+ }
+
+ /* skip over the TS hdr to return a pointer to the PES hdr */
+ int udata = 4;
+ switch (buf[3] & 0x30)
+ {
+ case 0x00: // illegal
+ case 0x20: // fill packet
+ continue;
+
+ case 0x30: // adaptation
if (buf[4] > 182)
{
hb_log("hb_ts_stream_getPEStype: invalid adaptation field length %d for PID 0x%x", buf[4], pid);
udata += buf[4] + 1;
break;
}
- return &buf[udata];
+ /* PES hdr has to begin with an mpeg start code */
+ if (buf[udata+0] == 0x00 && buf[udata+1] == 0x00 && buf[udata+2] == 0x01)
+ {
+ return &buf[udata];
+ }
}
/* didn't find it */
hb_buffer_t *es;
// 'buf' contains an MPEG2 PACK - get a list of all it's elementary streams
- hb_demux_ps(buf, list);
+ hb_demux_ps( buf, list, 0 );
while ( ( es = hb_list_item( list, 0 ) ) )
{
* hb_stream_duration
***********************************************************************
*
+ * Finding stream duration is difficult. One issue is that the video file
+ * may have chunks from several different program fragments (main feature,
+ * commercials, station id, trailers, etc.) all with their own base pts
+ * value. We can't find the piece boundaries without reading the entire
+ * file but if we compute a rate based on time stamps from two different
+ * pieces the result will be meaningless. The second issue is that the
+ * data rate of compressed video normally varies by 5-10x over the length
+ * of the video. This says that we want to compute the rate over relatively
+ * long segments to get a representative average but long segments increase
+ * the likelihood that we'll cross a piece boundary.
+ *
+ * What we do is take time stamp samples at several places in the file
+ * (currently 16) then compute the average rate (i.e., ticks of video per
+ * byte of the file) for all pairs of samples (N^2 rates computed for N
+ * samples). Some of those rates will be absurd because the samples came
+ * from different segments. Some will be way low or high because the
+ * samples came from a low or high motion part of the segment. But given
+ * that we're comparing *all* pairs the majority of the computed rates
+ * should be near the overall average. So we median filter the computed
+ * rates to pick the most representative value.
+ *
**********************************************************************/
struct pts_pos {
uint64_t pos; /* file position of this PTS sample */
uint64_t pts; /* PTS from video stream */
};
+#define NDURSAMPLES 128
+
+// get one (position, timestamp) sampple from a transport or program
+// stream.
static struct pts_pos hb_sample_pts(hb_stream_t *stream, uint64_t fpos)
{
struct pts_pos pp = { 0, 0 };
- if ( stream->stream_type == hb_stream_type_program )
- {
- // round address down to nearest dvd sector start
- fpos &=~ ( HB_DVD_READ_BUFFER_SIZE - 1 );
- fseeko( stream->file_handle, fpos, SEEK_SET );
- pp.pts = hb_ps_stream_getVideoPTS( stream );
- }
- else
+ if ( stream->hb_stream_type == transport )
{
const uint8_t *buf;
fseeko( stream->file_handle, fpos, SEEK_SET );
- align_to_next_packet( stream->file_handle );
- buf = hb_ts_stream_getPEStype( stream, stream->ts_video_pids[0] );
+ align_to_next_packet( stream );
+ int pid = stream->ts_pids[index_of_video(stream)];
+ buf = hb_ts_stream_getPEStype( stream, pid );
if ( buf == NULL )
{
- hb_log("hb_sample_pts: couldn't find video packet near %llu", fpos);
+ hb_log("hb_sample_pts: couldn't find video packet near %"PRIu64, fpos);
return pp;
}
if ( ( buf[7] >> 7 ) != 1 )
{
- hb_log("hb_sample_pts: no PTS in video packet near %llu", fpos);
+ hb_log("hb_sample_pts: no PTS in video packet near %"PRIu64, fpos);
return pp;
}
pp.pts = ( ( (uint64_t)buf[9] >> 1 ) & 7 << 30 ) |
( ( (uint64_t)buf[11] >> 1 ) << 15 ) |
( (uint64_t)buf[12] << 7 ) |
( (uint64_t)buf[13] >> 1 );
+
+ if ( isIframe( stream, buf, -4 ) )
+ {
+ if ( stream->ts_IDRs < 255 )
+ {
+ ++stream->ts_IDRs;
+ }
+ }
+ }
+ else
+ {
+ // round address down to nearest dvd sector start
+ fpos &=~ ( HB_DVD_READ_BUFFER_SIZE - 1 );
+ fseeko( stream->file_handle, fpos, SEEK_SET );
+ if ( stream->hb_stream_type == program )
+ {
+ skip_to_next_pack( stream );
+ }
+ pp.pts = hb_ps_stream_getVideoPTS( stream );
}
pp.pos = ftello(stream->file_handle);
- hb_log("hb_sample_pts: pts %lld at %llu", pp.pts, pp.pos );
return pp;
}
+static int dur_compare( const void *a, const void *b )
+{
+ const double *aval = a, *bval = b;
+ return ( *aval < *bval ? -1 : ( *aval == *bval ? 0 : 1 ) );
+}
+
+// given an array of (position, time) samples, compute a max-likelihood
+// estimate of the average rate by computing the rate between all pairs
+// of samples then taking the median of those rates.
+static double compute_stream_rate( struct pts_pos *pp, int n )
+{
+ int i, j;
+ double rates[NDURSAMPLES * NDURSAMPLES / 8];
+ double *rp = rates;
+
+ // the following nested loops compute the rates between all pairs.
+ *rp = 0;
+ for ( i = 0; i < n-1; ++i )
+ {
+ // Bias the median filter by not including pairs that are "far"
+ // from one another. This is to handle cases where the file is
+ // made of roughly equal size pieces where a symmetric choice of
+ // pairs results in having the same number of intra-piece &
+ // inter-piece rate estimates. This would mean that the median
+ // could easily fall in the inter-piece part of the data which
+ // would give a bogus estimate. The 'ns' index creates an
+ // asymmetry that favors locality.
+ int ns = i + ( n >> 3 );
+ if ( ns > n )
+ ns = n;
+ for ( j = i+1; j < ns; ++j )
+ {
+ if ( (uint64_t)(pp[j].pts - pp[i].pts) > 90000LL*3600*6 )
+ break;
+ if ( pp[j].pts != pp[i].pts && pp[j].pos > pp[i].pos )
+ {
+ *rp = ((double)( pp[j].pts - pp[i].pts )) /
+ ((double)( pp[j].pos - pp[i].pos ));
+ ++rp;
+ }
+ }
+ }
+ // now compute and return the median of all the (n*n/2) rates we computed
+ // above.
+ int nrates = rp - rates;
+ qsort( rates, nrates, sizeof (rates[0] ), dur_compare );
+ return rates[nrates >> 1];
+}
+
static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle)
{
- // To calculate the duration we get video presentation time stamps
- // at a couple places in the file then use their difference scaled
- // by the ratio of the distance between our measurement points &
- // the size of the file. The issue is that our video file may have
- // chunks from several different program fragments (main feature,
- // commercials, station id, trailers, etc.) all with their own base
- // pts value. We need to difference two pts's from the same program
- // fragment. Since extraneous material is very likely at the beginning
- // and end of the content, for now we take a time stamp from 25%
- // into the file & 75% into the file then double their difference
- // to get the total duration.
- struct pts_pos first_pts, last_pts;
+ struct pts_pos ptspos[NDURSAMPLES];
+ struct pts_pos *pp = ptspos;
+ int i;
fseeko(stream->file_handle, 0, SEEK_END);
uint64_t fsize = ftello(stream->file_handle);
- first_pts = hb_sample_pts(stream, fsize >> 2);
- last_pts = hb_sample_pts(stream, fsize - (fsize >> 2) );
-
- if ( first_pts.pos && last_pts.pos && first_pts.pos != last_pts.pos )
+ uint64_t fincr = fsize / NDURSAMPLES;
+ uint64_t fpos = fincr / 2;
+ for ( i = NDURSAMPLES; --i >= 0; fpos += fincr )
{
- uint64_t dur = ( ( last_pts.pts - first_pts.pts ) * fsize ) /
- ( last_pts.pos - first_pts.pos );
- inTitle->duration = dur;
- dur /= 90000;
- inTitle->hours = dur / 3600;
- inTitle->minutes = ( dur % 3600 ) / 60;
- inTitle->seconds = dur % 60;
+ *pp++ = hb_sample_pts(stream, fpos);
}
+ uint64_t dur = compute_stream_rate( ptspos, pp - ptspos ) * (double)fsize;
+ inTitle->duration = dur;
+ dur /= 90000;
+ inTitle->hours = dur / 3600;
+ inTitle->minutes = ( dur % 3600 ) / 60;
+ inTitle->seconds = dur % 60;
+
rewind(stream->file_handle);
}
**********************************************************************/
int hb_stream_read( hb_stream_t * src_stream, hb_buffer_t * b )
{
- if (src_stream->stream_type == hb_stream_type_program)
- {
- size_t amt_read;
- amt_read = fread(b->data, HB_DVD_READ_BUFFER_SIZE, 1, src_stream->file_handle);
- if (amt_read > 0)
- return 1;
- else
- return 0;
- }
- else if (src_stream->stream_type == hb_stream_type_transport)
- {
- int read_buffer_index = src_stream->ps_current_read_buffer_index;
-
- // Transport streams are a little more complex - we might be able to just
- // read from the transport stream conversion buffer (if there's enough data)
- // or we may need to transfer what's left and fill it again.
- if (src_stream->ps_decode_buffer[read_buffer_index].len
- - src_stream->ps_decode_buffer[read_buffer_index].read_pos
- >= HB_DVD_READ_BUFFER_SIZE)
- {
- memcpy(b->data,
- src_stream->ps_decode_buffer[read_buffer_index].data +
- src_stream->ps_decode_buffer[read_buffer_index].read_pos,
- HB_DVD_READ_BUFFER_SIZE);
- src_stream->ps_decode_buffer[read_buffer_index].read_pos += HB_DVD_READ_BUFFER_SIZE;
- return 1;
- }
- else
- {
- // Not quite enough data in the buffer - transfer what is present, fill the buffer and then
- // transfer what's still needed.
- int transfer_size = HB_DVD_READ_BUFFER_SIZE;
- int amt_avail_to_transfer = src_stream->ps_decode_buffer[read_buffer_index].len - src_stream->ps_decode_buffer[read_buffer_index].read_pos;
- memcpy(b->data, src_stream->ps_decode_buffer[read_buffer_index].data + src_stream->ps_decode_buffer[read_buffer_index].read_pos, amt_avail_to_transfer);
- transfer_size -= amt_avail_to_transfer;
-
- // Give up this buffer - decoding may well need it, and we're done
- src_stream->ps_decode_buffer[read_buffer_index].read_pos = 0;
- src_stream->ps_decode_buffer[read_buffer_index].write_pos = 0;
- src_stream->ps_decode_buffer[read_buffer_index].len = 0;
-
- // Fill the buffer
- hb_ts_stream_decode(src_stream);
-
- // Decoding will almost certainly have changed the current read buffer index
- read_buffer_index = src_stream->ps_current_read_buffer_index;
-
- if (src_stream->ps_decode_buffer[read_buffer_index].len == 0)
- {
- hb_log("hb_stream_read - buffer after decode has zero length data");
- return 0;
- }
-
- // Read the bit we still need
- memcpy(b->data+amt_avail_to_transfer, src_stream->ps_decode_buffer[read_buffer_index].data + src_stream->ps_decode_buffer[read_buffer_index].read_pos,transfer_size);
- src_stream->ps_decode_buffer[read_buffer_index].read_pos += transfer_size;
-
- return 1;
- }
- }
- else
- return 0;
+ if ( src_stream->hb_stream_type == ffmpeg )
+ {
+ return ffmpeg_read( src_stream, b );
+ }
+ if ( src_stream->hb_stream_type == dvd_program )
+ {
+ size_t amt_read = fread(b->data, HB_DVD_READ_BUFFER_SIZE, 1,
+ src_stream->file_handle);
+ return (amt_read > 0);
+ }
+ if ( src_stream->hb_stream_type == program )
+ {
+ // a general program stream has arbitrary sized pack's. we're
+ // currently positioned at the start of a pack so read up to but
+ // not including the start of the next, expanding the buffer
+ // as necessary.
+ uint8_t *cp = b->data;
+ uint8_t *ep = cp + b->alloc;
+ uint32_t strt_code = -1;
+ int c;
+
+ // consume the first byte of the initial pack so we don't match on
+ // it in the loop below.
+ if ( ( c = getc( src_stream->file_handle ) ) == EOF )
+ return 0;
+
+ *cp++ = c;
+
+ flockfile( src_stream->file_handle );
+ while ( ( c = getc_unlocked( src_stream->file_handle ) ) != EOF )
+ {
+ strt_code = ( strt_code << 8 ) | c;
+ if ( strt_code == 0x000001ba )
+ // we found the start of the next pack
+ break;
+ if ( cp >= ep )
+ {
+ // need to expand the buffer
+ int curSize = cp - b->data;
+ hb_buffer_realloc( b, curSize * 2 );
+ cp = b->data + curSize;
+ ep = b->data + b->alloc;
+ }
+ *cp++ = c;
+ // Non-video streams can emulate start codes, so we need
+ // to inspect PES packets and skip over their data
+ // sections to avoid mis-detection of the next pack header.
+ if ( ( strt_code >> 8 ) == 0x000001 &&
+ ( strt_code & 0xff ) >= 0xbb )
+ {
+ int len = 0;
+ c = getc_unlocked( src_stream->file_handle );
+ if ( c == EOF )
+ break;
+ len = c << 8;
+ c = getc_unlocked( src_stream->file_handle );
+ if ( c == EOF )
+ break;
+ len |= c;
+ if ( cp+len+2 > ep )
+ {
+ // need to expand the buffer
+ int curSize = cp - b->data;
+ if ( curSize * 2 > curSize+len+2 )
+ hb_buffer_realloc( b, curSize * 2 );
+ else
+ hb_buffer_realloc( b, curSize + len + 2 );
+ cp = b->data + curSize;
+ ep = b->data + b->alloc;
+ }
+ *cp++ = len >> 8;
+ *cp++ = len & 0xff;
+ fread( cp, 1, len, src_stream->file_handle );
+ cp += len;
+ }
+ }
+ funlockfile( src_stream->file_handle );
+
+ // if we didn't terminate on an eof back up so the next read
+ // starts on the pack boundary.
+ b->size = cp - b->data;
+ if ( c != EOF )
+ {
+ fseeko( src_stream->file_handle, -4, SEEK_CUR );
+ // Only 3 of the 4 bytes read were added to the buffer.
+ b->size -= 3;
+ }
+ return 1;
+ }
+ return hb_ts_stream_decode( src_stream, b );
+}
+
+int64_t ffmpeg_initial_timestamp( hb_stream_t * stream )
+{
+ AVStream *s = stream->ffmpeg_ic->streams[stream->ffmpeg_video_id];
+ if ( s->nb_index_entries < 1 )
+ return 0;
+
+ return s->index_entries[0].timestamp;
+}
+int hb_stream_seek_chapter( hb_stream_t * stream, int chapter_num )
+{
+
+ if ( stream->hb_stream_type != ffmpeg )
+ {
+ // currently meaningliess for transport and program streams
+ return 1;
+ }
+ if ( !stream || !stream->title ||
+ chapter_num > hb_list_count( stream->title->list_chapter ) )
+ {
+ return 0;
+ }
+
+ int64_t sum_dur = 0;
+ hb_chapter_t *chapter = NULL;
+ int i;
+ for ( i = 0; i < chapter_num; ++i)
+ {
+ chapter = hb_list_item( stream->title->list_chapter, i );
+ sum_dur += chapter->duration;
+ }
+ stream->chapter = chapter_num - 1;
+ stream->chapter_end = sum_dur;
+
+ int64_t pos = ( ( ( sum_dur - chapter->duration ) * AV_TIME_BASE ) / 90000 ) + ffmpeg_initial_timestamp( stream );
+
+ hb_deep_log( 2, "Seeking to chapter %d: starts %"PRId64", ends %"PRId64", AV pos %"PRId64,
+ chapter_num, sum_dur - chapter->duration, sum_dur, pos);
+
+ if ( chapter_num > 1 && pos > 0 )
+ {
+ av_seek_frame( stream->ffmpeg_ic, -1, pos, 0);
+ }
+ else
+ {
+ // ffmpeg has a bug that causes the first PTS after
+ // av_find_stream_info() is called to be incorrect.
+ // av_find_stream_info is called whenever opening a file
+ // with ffmpeg. av_seek_frame clears the condition
+ // that causes the problem. since hb_stream_seek_chapter
+ // is called before we start reading, make sure
+ // we do a seek here.
+ av_seek_frame( stream->ffmpeg_ic, -1, ffmpeg_initial_timestamp( stream ), AVSEEK_FLAG_BACKWARD | AVSEEK_FLAG_ANY );
+ }
+ return 1;
+}
+
+/***********************************************************************
+ * hb_stream_chapter
+ ***********************************************************************
+ * Return the number of the chapter that we are currently in. We store
+ * the chapter number starting from 0, so + 1 for the real chpater num.
+ **********************************************************************/
+int hb_stream_chapter( hb_stream_t * src_stream )
+{
+ return( src_stream->chapter + 1 );
}
/***********************************************************************
***********************************************************************
*
**********************************************************************/
-int hb_stream_seek( hb_stream_t * src_stream, float f )
-{
- off_t stream_size, cur_pos, new_pos;
- double pos_ratio = f;
- cur_pos = ftello(src_stream->file_handle);
- fseeko(src_stream->file_handle,0 ,SEEK_END);
- stream_size = ftello(src_stream->file_handle);
- new_pos = (off_t) ((double) (stream_size) * pos_ratio);
- new_pos &=~ (HB_DVD_READ_BUFFER_SIZE - 1);
- int r = fseeko(src_stream->file_handle, new_pos, SEEK_SET);
-
- if (r == -1)
- {
- fseeko(src_stream->file_handle, cur_pos, SEEK_SET);
- return 0;
- }
-
- if (src_stream->stream_type == hb_stream_type_transport)
- {
- // We need to drop the current decoder output and move
- // forwards to the next transport stream packet.
- hb_ts_stream_reset(src_stream);
- }
-
- // Now we must scan forwards for a valid start code (0x000001BA)
- int done = 0;
- hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
- while (!done)
- {
- if (hb_stream_read(src_stream,buf) == 1)
- {
- int i=0;
- for (i=0; (i <= HB_DVD_READ_BUFFER_SIZE-4) && (!done); i++)
- {
- if ((buf->data[i] == 0x00) && (buf->data[i+1] == 0x00) && (buf->data[i+2] == 0x01) && (buf->data[i+3] == 0xba))
- {
- done = 1;
- // 'Put Back' the data we've just read (up to this point)
- hb_stream_put_back(src_stream, i);
- }
- }
+int hb_stream_seek( hb_stream_t * stream, float f )
+{
+ if ( stream->hb_stream_type == ffmpeg )
+ {
+ return ffmpeg_seek( stream, f );
+ }
+ off_t stream_size, cur_pos, new_pos;
+ double pos_ratio = f;
+ cur_pos = ftello( stream->file_handle );
+ fseeko( stream->file_handle, 0, SEEK_END );
+ stream_size = ftello( stream->file_handle );
+ new_pos = (off_t) ((double) (stream_size) * pos_ratio);
+ new_pos &=~ (HB_DVD_READ_BUFFER_SIZE - 1);
+
+ int r = fseeko( stream->file_handle, new_pos, SEEK_SET );
+ if (r == -1)
+ {
+ fseeko( stream->file_handle, cur_pos, SEEK_SET );
+ return 0;
+ }
+
+ if ( stream->hb_stream_type == transport )
+ {
+ // We need to drop the current decoder output and move
+ // forwards to the next transport stream packet.
+ hb_ts_stream_reset(stream);
+ if ( f > 0 )
+ {
+ if ( stream->ts_IDRs )
+ {
+ // the stream has IDRs so look for one.
+ stream->need_keyframe = 1;
+ }
+ }
+ else
+ {
+ // we're at the beginning - say we have video sync so that we
+ // won't drop initial SPS & PPS data on an AVC stream.
+ stream->need_keyframe = 0;
+ }
+ }
+ else if ( stream->hb_stream_type == program )
+ {
+ skip_to_next_pack( stream );
+ }
+
+ return 1;
+}
+
+int hb_stream_seek_ts( hb_stream_t * stream, int64_t ts )
+{
+ if ( stream->hb_stream_type == ffmpeg )
+ {
+ return ffmpeg_seek_ts( stream, ts );
+ }
+ return -1;
+}
+
+static void set_audio_description( hb_audio_t *audio, iso639_lang_t *lang )
+{
+ /* XXX
+ * This is a duplicate of code in dvd.c - it should get factored out
+ * into a common routine. We probably should only be putting the lang
+ * code or a lang pointer into the audio config & let the common description
+ * formatting routine in scan.c do all the stuff below.
+ */
+ const char *codec_name;
+ AVCodecContext *cc;
+
+ if ( audio->config.in.codec == HB_ACODEC_FFMPEG &&
+ ( cc = hb_ffmpeg_context( audio->config.in.codec_param ) ) &&
+ avcodec_find_decoder( cc->codec_id ) )
+ {
+ AVCodec *codec = avcodec_find_decoder( cc->codec_id );
+ codec_name = codec->name;
+ if ( !strcmp( codec_name, "DCA" ) )
+ {
+ codec_name = "DTS";
+ }
+
+ char *profile_name;
+ profile_name = av_get_profile_name( codec, cc->profile );
+ if ( profile_name )
+ {
+ codec_name = profile_name;
+ }
+ }
+ else if ( audio->config.in.codec == HB_ACODEC_MPGA &&
+ avcodec_find_decoder( audio->config.in.codec_param ) )
+ {
+ codec_name = avcodec_find_decoder( audio->config.in.codec_param )->name;
}
else
- done = 1; // End of data;
- }
- hb_buffer_close(&buf);
- return 1;
+ {
+ codec_name = audio->config.in.codec == HB_ACODEC_AC3 ? "AC3" :
+ audio->config.in.codec == HB_ACODEC_DCA ? "DTS" :
+ audio->config.in.codec == HB_ACODEC_MPGA ? "MPEG" :
+ audio->config.in.codec == HB_ACODEC_LPCM ? "LPCM" :
+ audio->config.in.codec == HB_ACODEC_FFMPEG ? "FFMPEG" :
+ "Unknown";
+ }
+ snprintf( audio->config.lang.description,
+ sizeof( audio->config.lang.description ), "%s (%s)",
+ strlen(lang->native_name) ? lang->native_name : lang->eng_name,
+ codec_name );
+
+ if (audio->config.in.codec == HB_ACODEC_FFMPEG)
+ {
+ int layout = audio->config.in.channel_layout;
+ char *desc = audio->config.lang.description +
+ strlen( audio->config.lang.description );
+ sprintf( desc, " (%d.%d ch)",
+ HB_INPUT_CH_LAYOUT_GET_DISCRETE_FRONT_COUNT(layout) +
+ HB_INPUT_CH_LAYOUT_GET_DISCRETE_REAR_COUNT(layout),
+ HB_INPUT_CH_LAYOUT_GET_DISCRETE_LFE_COUNT(layout) );
+ }
+
+ snprintf( audio->config.lang.simple, sizeof( audio->config.lang.simple ), "%s",
+ strlen(lang->native_name) ? lang->native_name : lang->eng_name );
+ snprintf( audio->config.lang.iso639_2, sizeof( audio->config.lang.iso639_2 ),
+ "%s", lang->iso639_2);
}
static hb_audio_t *hb_ts_stream_set_audio_id_and_codec(hb_stream_t *stream,
- int aud_pid_index)
+ int idx)
{
off_t cur_pos = ftello(stream->file_handle);
- hb_audio_t *audio = calloc( sizeof( hb_audio_t ), 1 );
+ hb_audio_t *audio = NULL;
const uint8_t *buf;
+ kind_t kind;
+ uint8_t stype = 0;
+
+ kind = stream->ts_stream_kind[idx];
+
+ if ( kind != A && kind != U && kind != N )
+ {
+ // Not audio
+ return NULL;
+ }
+ stype = stream->ts_stream_type[idx];
fseeko(stream->file_handle, 0, SEEK_SET);
- align_to_next_packet(stream->file_handle);
- buf = hb_ts_stream_getPEStype(stream, stream->ts_audio_pids[aud_pid_index]);
+ align_to_next_packet(stream);
+
+ buf = hb_ts_stream_getPEStype(stream, stream->ts_pids[idx]);
/* check that we found a PES header */
if (buf && buf[0] == 0x00 && buf[1] == 0x00 && buf[2] == 0x01)
{
- if (buf[3] == 0xbd)
+ // 0xbd ("private stream 1") is the normal container for non-ISO
+ // media - AC3/DCA/PCM/etc.
+ if ( buf[3] == 0xbd )
+ {
+ if ( kind == U )
+ {
+ // XXX assume unknown stream types are AC-3 (if they're not
+ // audio we'll find that out during the scan but if they're
+ // some other type of audio we'll end up ignoring them).
+ stype = 0x81;
+ stream->ts_stream_type[idx] = 0x81;
+ kind = A;
+ }
+ if ( stype == 0x80 &&
+ stream->pmt_info.reg_desc == STR4_TO_UINT32("HDMV") )
+ {
+ // LPCM audio in bluray have an stype of 0x80
+ // 0x80 is used for other DigiCipher normally
+ // To distinguish, Bluray streams have a reg_desc of HDMV
+ kind = A;
+ }
+ }
+ else if ( buf[3] == 0xfd )
{
- audio->id = 0x80bd | (aud_pid_index << 8);
- audio->codec = HB_ACODEC_AC3;
- hb_log("transport stream pid 0x%x (type 0x%x) is AC-3 audio id 0x%x",
- stream->ts_audio_pids[aud_pid_index],
- stream->ts_audio_stream_type[aud_pid_index],
- audio->id);
- stream->ts_audio_stream_type[aud_pid_index] = 0x81;
- stream->ts_streamid[stream->ts_number_video_pids + aud_pid_index] = buf[3];
+ // 0xfd indicates an extended stream id (ISO 13818-1(2007)).
+ // the blu ray consortium apparently forgot to read the portion
+ // of the MPEG spec that says one PID should map to one media
+ // stream and multiplexed multiple types of audio into one PID
+ // using the extended stream identifier of the PES header to
+ // distinguish them. So we have to check if that's happening and
+ // if so tell the runtime what esid we want.
+ if ( st2codec[stype].kind == A && stype == 0x83 &&
+ stream->ts_format_id[idx] == TS_FORMAT_ID_AC3 )
+ {
+ // This is an interleaved TrueHD/AC-3 stream and the esid of
+ // the AC-3 is 0x76
+ stream->ts_multiplexed[idx] = 0x76;
+ stype = 0x81;
+ stream->ts_stream_type[idx] = 0x81;
+ kind = A;
+ }
+ if ( st2codec[stype].kind == A && stype == 0x86 )
+ {
+ // This is an interleaved DTS-HD/DTS stream and the esid of
+ // the DTS is 0x71
+ stream->ts_multiplexed[idx] = 0x71;
+ stype = 0x82;
+ stream->ts_stream_type[idx] = 0x82;
+ kind = A;
+ }
+ if ( stype == 0x84 &&
+ stream->pmt_info.reg_desc == STR4_TO_UINT32("HDMV") )
+ {
+ // EAC3 audio in bluray has an stype of 0x84
+ // which conflicts with SDDS
+ // To distinguish, Bluray streams have a reg_desc of HDMV
+ stype = 0x87;
+ stream->ts_stream_type[idx] = 0x87;
+ kind = A;
+ }
}
else if ((buf[3] & 0xe0) == 0xc0)
{
- audio->id = buf[3] | aud_pid_index;
- audio->codec = HB_ACODEC_MPGA;
- hb_log("transport stream pid 0x%x (type 0x%x) is MPEG audio id 0x%x",
- stream->ts_audio_pids[aud_pid_index],
- stream->ts_audio_stream_type[aud_pid_index],
- audio->id);
- stream->ts_audio_stream_type[aud_pid_index] = 0x03;
- stream->ts_streamid[stream->ts_number_video_pids + aud_pid_index] = buf[3];
+ // 0xC0 - 0xCF are the normal containers for ISO-standard
+ // media (mpeg2 audio and mpeg4 AAC).
+ if ( st2codec[stype].kind == U )
+ {
+ // XXX assume unknown stream types are MPEG audio
+ stype = 0x03;
+ stream->ts_stream_type[idx] = 0x03;
+ kind = A;
+ }
+ }
+ else
+ {
+ stype = 0;
+ kind = N;
}
}
- fseeko(stream->file_handle, cur_pos, SEEK_SET);
- if (! audio->codec)
+
+ // if we found an audio stream type & HB has a codec that can decode it
+ // finish configuring the audio so we'll add it to the title's list.
+ if ( kind == A && st2codec[stype].codec )
+ {
+ audio = calloc( sizeof( hb_audio_t ), 1 );
+
+ stream->ts_stream_kind[idx] = A;
+ audio->id = stream->ts_pids[idx];
+ audio->config.in.codec = st2codec[stype].codec;
+ audio->config.in.codec_param = st2codec[stype].codec_param;
+ set_audio_description( audio,
+ lang_for_code( stream->a52_info[idx].lang_code ) );
+ hb_log("transport stream pid 0x%x (type 0x%x) may be %s audio (id 0x%x)",
+ stream->ts_pids[idx],
+ stype, st2codec[stype].name, audio->id);
+
+ }
+ else
{
- hb_log("transport stream pid 0x%x (type 0x%x) isn't audio",
- stream->ts_audio_pids[aud_pid_index],
- stream->ts_audio_stream_type[aud_pid_index]);
- }
+ if ( buf )
+ {
+ hb_log("transport stream pid 0x%x (type 0x%x, substream 0x%x) "
+ "isn't audio", stream->ts_pids[idx],
+ stream->ts_stream_type[idx], buf[3]);
+ }
+ else
+ {
+ hb_log("transport stream pid 0x%x (type 0x%x) isn't audio",
+ stream->ts_pids[idx],
+ stream->ts_stream_type[idx]);
+ }
+ }
+ fseeko(stream->file_handle, cur_pos, SEEK_SET);
+
return audio;
}
switch ( id >> 12 )
{
case 0x0:
- audio->codec = HB_ACODEC_MPGA;
+ audio->config.in.codec = HB_ACODEC_MPGA;
hb_log("add_audio_to_title: added MPEG audio stream 0x%x", id);
break;
case 0x2:
free( audio );
return;
case 0x8:
- audio->codec = HB_ACODEC_AC3;
+ audio->config.in.codec = HB_ACODEC_AC3;
hb_log("add_audio_to_title: added AC3 audio stream 0x%x", id);
break;
case 0xa:
- audio->codec = HB_ACODEC_LPCM;
+ audio->config.in.codec = HB_ACODEC_LPCM;
hb_log("add_audio_to_title: added LPCM audio stream 0x%x", id);
break;
default:
return;
}
+ set_audio_description( audio, lang_for_code( 0 ) );
hb_list_add( title->list_audio, audio );
}
// start looking 20% into the file since there's occasionally no
// audio at the beginning (particularly for vobs).
hb_stream_seek(stream, 0.2f);
-
+
while (--blksleft >= 0 && hb_stream_read(stream, buf) == 1)
{
hb_buffer_t *es;
// 'buf' contains an MPEG2 PACK - get a list of all it's elementary streams
- hb_demux_ps(buf, list);
+ hb_demux_ps( buf, list, 0 );
while ( ( es = hb_list_item( list, 0 ) ) )
{
}
/***********************************************************************
- * hb_stream_update_audio
+ * hb_ts_stream_init
***********************************************************************
*
**********************************************************************/
-void hb_stream_update_audio(hb_stream_t *stream, hb_audio_t *audio)
-{
- iso639_lang_t *lang;
-
- if (stream->stream_type == hb_stream_type_transport)
- {
- // Find the audio stream info for this PID. The stream index is
- // the subchannel id which is in the bottom four bits for MPEG audio
- // and the bottom four bits of the upper byte for everything else.
- int i = ( audio->id >= 0xd0 ? audio->id >> 8 : audio->id ) & 0xf;
- if (i >= stream->ts_number_audio_pids)
- {
- hb_log("hb_stream_update_audio: no PID for audio stream 0x%x",
- audio->id);
- return;
- }
- if (audio->id < 0xd0)
- {
- /* XXX fake mpeg audio sample rate & bps */
- stream->a52_info[i].flags = A52_STEREO;
- stream->a52_info[i].rate = 48000 /*Hz*/;
- stream->a52_info[i].bitrate = 384000 /*Bps*/;
- }
-
- lang = lang_for_code(stream->a52_info[i].lang_code);
- if (!audio->rate)
- audio->rate = stream->a52_info[i].rate;
- if (!audio->bitrate)
- audio->bitrate = stream->a52_info[i].bitrate;
- if (!audio->config.a52.ac3flags)
- audio->config.a52.ac3flags = audio->ac3flags = stream->a52_info[i].flags;
-
- }
- else
+
+static void hb_ts_stream_init(hb_stream_t *stream)
+{
+ int i;
+
+ for (i=0; i < kMaxNumberDecodeStreams; i++)
{
- // XXX should try to get language code from the AC3 bitstream
- lang = lang_for_code(0x0000);
- }
-
- if (!audio->input_channel_layout)
- {
- switch( audio->ac3flags & A52_CHANNEL_MASK )
- {
- /* mono sources */
- case A52_MONO:
- case A52_CHANNEL1:
- case A52_CHANNEL2:
- audio->input_channel_layout = HB_INPUT_CH_LAYOUT_MONO;
- break;
- /* stereo input */
- case A52_CHANNEL:
- case A52_STEREO:
- audio->input_channel_layout = HB_INPUT_CH_LAYOUT_STEREO;
- break;
- /* dolby (DPL1 aka Dolby Surround = 4.0 matrix-encoded) input */
- case A52_DOLBY:
- audio->input_channel_layout = HB_INPUT_CH_LAYOUT_DOLBY;
- break;
- /* 3F/2R input */
- case A52_3F2R:
- audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F2R;
- break;
- /* 3F/1R input */
- case A52_3F1R:
- audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F1R;
- break;
- /* other inputs */
- case A52_3F:
- audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F;
- break;
- case A52_2F1R:
- audio->input_channel_layout = HB_INPUT_CH_LAYOUT_2F1R;
- break;
- case A52_2F2R:
- audio->input_channel_layout = HB_INPUT_CH_LAYOUT_2F2R;
- break;
- /* unknown */
- default:
- audio->input_channel_layout = HB_INPUT_CH_LAYOUT_STEREO;
- }
-
- /* add in our own LFE flag if the source has LFE */
- if (audio->ac3flags & A52_LFE)
- {
- audio->input_channel_layout = audio->input_channel_layout | HB_INPUT_CH_LAYOUT_HAS_LFE;
- }
- }
-
- snprintf( audio->lang, sizeof( audio->lang ), "%s (%s)", strlen(lang->native_name) ? lang->native_name : lang->eng_name,
- audio->codec == HB_ACODEC_AC3 ? "AC3" : ( audio->codec == HB_ACODEC_MPGA ? "MPEG" : ( audio->codec == HB_ACODEC_DCA ? "DTS" : "LPCM" ) ) );
- snprintf( audio->lang_simple, sizeof( audio->lang_simple ), "%s", strlen(lang->native_name) ? lang->native_name : lang->eng_name );
- snprintf( audio->iso639_2, sizeof( audio->iso639_2 ), "%s", lang->iso639_2);
-
- if ( (audio->ac3flags & A52_CHANNEL_MASK) == A52_DOLBY ) {
- sprintf( audio->lang + strlen( audio->lang ),
- " (Dolby Surround)" );
- } else {
- sprintf( audio->lang + strlen( audio->lang ),
- " (%d.%d ch)",
- HB_INPUT_CH_LAYOUT_GET_DISCRETE_FRONT_COUNT(audio->input_channel_layout) +
- HB_INPUT_CH_LAYOUT_GET_DISCRETE_REAR_COUNT(audio->input_channel_layout),
- HB_INPUT_CH_LAYOUT_GET_DISCRETE_LFE_COUNT(audio->input_channel_layout));
- }
-
- hb_log( "hb_stream_update_audio: id=%x, lang=%s, 3cc=%s, rate = %d, bitrate = %d, flags = 0x%x (%d)", audio->id, audio->lang, audio->iso639_2, audio->rate, audio->bitrate, audio->ac3flags, audio->ac3flags );
+ stream->ts_streamcont[i] = -1;
+ stream-> ts_pids[i] = -1;
+ }
+ stream->ts_packet = malloc( stream->packetsize );
+
+ // Find the audio and video pids in the stream
+ hb_ts_stream_find_pids(stream);
+ for (i = 0; i < stream->ts_number_pids; i++)
+ {
+ // demuxing buffer for TS to PS conversion
+ stream->ts_buf[i] = hb_buffer_init(stream->packetsize);
+ stream->ts_buf[i]->size = 0;
+ }
}
-/***********************************************************************
- * hb_stream_put_back
- ***********************************************************************
- *
- **********************************************************************/
-static void hb_stream_put_back(hb_stream_t *stream, int i)
-{
- if (stream->stream_type == hb_stream_type_program)
- {
- // Program streams are pretty easy - we just reposition the source file
- // pointer
- fseeko(stream->file_handle, -(HB_DVD_READ_BUFFER_SIZE-i), SEEK_CUR);
- }
- else if (stream->stream_type == hb_stream_type_transport)
- {
- int read_buffer_index = stream->ps_current_read_buffer_index;
-
- // Transport streams are a little more tricky - so long as the
- // amount to back up is still within the current decode buffer
- // we can just adjust the read pos.
- if (stream->ps_decode_buffer[read_buffer_index].read_pos - i > 0)
- {
- stream->ps_decode_buffer[read_buffer_index].read_pos -= i;
- }
- else
- hb_error("hb_stream_put_back - trying to step beyond the start of the buffer, read_pos = %d amt to put back = %d\n", stream->ps_decode_buffer[read_buffer_index].read_pos, i);
- }
+#define MAX_HOLE 208*80
+
+static off_t align_to_next_packet(hb_stream_t *stream)
+{
+ uint8_t buf[MAX_HOLE];
+ off_t pos = 0;
+ off_t start = ftello(stream->file_handle);
+ off_t orig;
+
+ if ( start >= stream->packetsize ) {
+ start -= stream->packetsize;
+ fseeko(stream->file_handle, start, SEEK_SET);
+ }
+ orig = start;
+
+ while (1)
+ {
+ if (fread(buf, sizeof(buf), 1, stream->file_handle) == 1)
+ {
+ const uint8_t *bp = buf;
+ int i;
+
+ for ( i = sizeof(buf) - 8 * stream->packetsize; --i >= 0; ++bp )
+ {
+ if ( have_ts_sync( bp, stream->packetsize ) )
+ {
+ break;
+ }
+ }
+ if ( i >= 0 )
+ {
+ pos = ( bp - buf ) - stream->packetsize + 188;
+ break;
+ }
+ fseeko(stream->file_handle, -8 * stream->packetsize, SEEK_CUR);
+ start = ftello(stream->file_handle);
+ }
+ else
+ {
+ return 0;
+ }
+ }
+ fseeko(stream->file_handle, start+pos, SEEK_SET);
+ return start - orig + pos;
}
-/***********************************************************************
- * hb_ts_stream_init
- ***********************************************************************
- *
- **********************************************************************/
- #define PS_DECODE_BUFFER_SIZE ( 1024 * 1024 * 4)
-
-static void hb_ts_stream_init(hb_stream_t *stream)
+typedef struct {
+ uint8_t *buf;
+ uint32_t val;
+ int pos;
+} bitbuf_t;
+
+static const unsigned int bitmask[] = {
+ 0x0,0x1,0x3,0x7,0xf,0x1f,0x3f,0x7f,0xff,
+ 0x1ff,0x3ff,0x7ff,0xfff,0x1fff,0x3fff,0x7fff,0xffff,
+ 0x1ffff,0x3ffff,0x7ffff,0xfffff,0x1fffff,0x3fffff,0x7fffff,0xffffff,
+ 0x1ffffff,0x3ffffff,0x7ffffff,0xfffffff,0x1fffffff,0x3fffffff,0x7fffffff,0xffffffff};
+
+static inline void set_buf(bitbuf_t *bb, uint8_t* buf, int bufsize, int clear)
+{
+ bb->pos = 0;
+ bb->buf = buf;
+ bb->val = (bb->buf[0] << 24) | (bb->buf[1] << 16) |
+ (bb->buf[2] << 8) | bb->buf[3];
+ if (clear)
+ memset(bb->buf, 0, bufsize);
+}
+
+static inline int buf_size(bitbuf_t *bb)
+{
+ return bb->pos >> 3;
+}
+
+static inline unsigned int get_bits(bitbuf_t *bb, int bits)
{
- // Output Program Stream
- int i=0;
- for (i=0; i < kNumDecodeBuffers; i++)
- {
- stream->ps_decode_buffer[i].data = (unsigned char *) malloc(PS_DECODE_BUFFER_SIZE);
- stream->ps_decode_buffer[i].read_pos = 0;
- stream->ps_decode_buffer[i].size = PS_DECODE_BUFFER_SIZE;
- stream->ps_decode_buffer[i].len = 0;
- stream->ps_decode_buffer[i].write_pos = 0;
- }
-
- for (i=0; i < kMaxNumberDecodeStreams; i++)
- {
- stream->ts_streamcont[i] = -1;
- }
-
- stream->ps_current_write_buffer_index = 0;
- stream->ps_current_read_buffer_index = 1;
-
- // Find the audio and video pids in the stream
- hb_ts_stream_find_pids(stream);
-
- for (i=0; i < stream->ts_number_video_pids; i++)
- {
- // In progress audio/video data during the transport stream -> program stream processing
- stream->ts_packetbuf[i] = (unsigned char *) malloc(1024 * 1024);
- stream->ts_streamid[i] = 0xE0; // Stream is Video
- }
-
- for (i = stream->ts_number_video_pids; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
- {
- stream->ts_packetbuf[i] = (unsigned char *) malloc(1024 * 1024);
- }
-}
-
-// ------------------------------------------------------------------------------------
-
-static off_t align_to_next_packet(FILE* f)
-{
- unsigned char buf[188*20];
-
- off_t start = ftello(f);
- off_t pos = 0;
-
- if (fread(buf, 188*20, 1, f) == 1)
- {
- int found = 0;
- while (!found && (pos < 188))
- {
- found = 1;
- int i = 0;
- for (i = 0; i < 188*20; i += 188)
- {
- unsigned char c = buf[pos+i];
- // Check sync byte
- if ((c != 0x47) && (c != 0x72) && (c != 0x29))
- {
- // this offset failed, try next
- found = 0;
- pos++;
- break;
- }
- }
- }
- }
-
- if (pos == 188)
- pos = 0; // failed to find anything!!!!!?
-
- fseeko(f, start+pos, SEEK_SET);
-
- return pos;
-}
-
-// ------------------------------------------------------------------------------------
-
-int bitpos = 0;
-unsigned int bitval = 0;
-unsigned char* bitbuf = NULL;
-unsigned int bitmask[] = {
- 0x0,0x1,0x3,0x7,0xf,0x1f,0x3f,0x7f,0xff,
- 0x1ff,0x3ff,0x7ff,0xfff,0x1fff,0x3fff,0x7fff,0xffff,
- 0x1ffff,0x3ffff,0x7ffff,0xfffff,0x1fffff,0x3fffff,0x7fffff,0xffffff,
- 0x1ffffff,0x3ffffff,0x7ffffff,0xfffffff,0x1fffffff,0x3fffffff,0x7fffffff,0xffffffff};
-
-static inline void set_buf(unsigned char* buf, int bufsize, int clear)
-{
- bitpos = 0;
- bitbuf = buf;
- bitval = (bitbuf[0] << 24) | (bitbuf[1] << 16) | (bitbuf[2] << 8) | bitbuf[3];
- if (clear)
- memset(bitbuf, 0, bufsize);
-}
-
-static inline int buf_size()
-{
- return bitpos >> 3;
-}
-
-static inline void set_bits(unsigned int val, int bits)
-{
- val &= bitmask[bits];
-
- while (bits > 0)
- {
- int bitsleft = (8 - (bitpos & 7));
- if (bits >= bitsleft)
- {
- bitbuf[bitpos >> 3] |= val >> (bits - bitsleft);
- bitpos += bitsleft;
- bits -= bitsleft;
- val &= bitmask[bits];
- }
- else
- {
- bitbuf[bitpos >> 3] |= val << (bitsleft - bits);
- bitpos += bits;
- bits = 0;
- }
- }
-}
-
-static inline unsigned int get_bits(int bits)
-{
- unsigned int val;
- int left = 32 - (bitpos & 31);
-
- if (bits < left)
- {
- val = (bitval >> (left - bits)) & bitmask[bits];
- bitpos += bits;
- }
- else
- {
- val = (bitval & bitmask[left]) << (bits - left);
- bitpos += left;
- bits -= left;
-
- int pos = bitpos >> 3;
- bitval = (bitbuf[pos] << 24) | (bitbuf[pos + 1] << 16) | (bitbuf[pos + 2] << 8) | bitbuf[pos + 3];
-
- if (bits > 0)
- {
- val |= (bitval >> (32 - bits)) & bitmask[bits];
- bitpos += bits;
- }
- }
-
- return val;
+ unsigned int val;
+ int left = 32 - (bb->pos & 31);
+
+ if (bits < left)
+ {
+ val = (bb->val >> (left - bits)) & bitmask[bits];
+ bb->pos += bits;
+ }
+ else
+ {
+ val = (bb->val & bitmask[left]) << (bits - left);
+ bb->pos += left;
+ bits -= left;
+
+ int pos = bb->pos >> 3;
+ bb->val = (bb->buf[pos] << 24) | (bb->buf[pos + 1] << 16) | (bb->buf[pos + 2] << 8) | bb->buf[pos + 3];
+
+ if (bits > 0)
+ {
+ val |= (bb->val >> (32 - bits)) & bitmask[bits];
+ bb->pos += bits;
+ }
+ }
+
+ return val;
}
// extract what useful information we can from the elementary stream
{
switch (dp[0])
{
+ case 5: // Registration descriptor
+ stream->ts_format_id[esindx] = (dp[2] << 24) | (dp[3] << 16) |
+ (dp[4] << 8) | dp[5];
+ break;
+
case 10: // ISO_639_language descriptor
stream->a52_info[esindx].lang_code = lang_to_code(lang_for_code2((const char *)&dp[2]));
break;
+ case 0x6a: // DVB AC-3 descriptor
+ stream->ts_stream_type[esindx] = 0x81;
+ break;
+
+ case 0x7a: // DVB EAC-3 descriptor
+ stream->ts_stream_type[esindx] = 0x87;
+ break;
+
default:
break;
}
}
}
+static const char *stream_type_name (uint8_t stream_type)
+{
+ return st2codec[stream_type].name? st2codec[stream_type].name : "Unknown";
+}
+
int decode_program_map(hb_stream_t* stream)
{
- set_buf(stream->pmt_info.tablebuf, stream->pmt_info.tablepos, 0);
+ bitbuf_t bb;
+ set_buf(&bb, stream->pmt_info.tablebuf, stream->pmt_info.tablepos, 0);
- get_bits(8); // table_id
- get_bits(4);
- unsigned int section_length = get_bits(12);
+ get_bits(&bb, 8); // table_id
+ get_bits(&bb, 4);
+ unsigned int section_length = get_bits(&bb, 12);
stream->pmt_info.section_length = section_length;
- unsigned int program_number = get_bits(16);
+ unsigned int program_number = get_bits(&bb, 16);
stream->pmt_info.program_number = program_number;
- get_bits(2);
- get_bits(5); // version_number
- get_bits(1);
- get_bits(8); // section_number
- get_bits(8); // last_section_number
- get_bits(3);
- unsigned int PCR_PID = get_bits(13);
- stream->pmt_info.PCR_PID = PCR_PID;
- get_bits(4);
- unsigned int program_info_length = get_bits(12);
+ get_bits(&bb, 2);
+ get_bits(&bb, 5); // version_number
+ get_bits(&bb, 1);
+ get_bits(&bb, 8); // section_number
+ get_bits(&bb, 8); // last_section_number
+ get_bits(&bb, 3);
+ stream->pmt_info.PCR_PID = get_bits(&bb, 13);
+ get_bits(&bb, 4);
+ int program_info_length = get_bits(&bb, 12);
stream->pmt_info.program_info_length = program_info_length;
- int i=0;
- unsigned char *descriptor_buf = (unsigned char *) malloc(program_info_length);
- for (i = 0; i < program_info_length; i++)
- {
- descriptor_buf[i] = get_bits(8);
- }
-
- int cur_pos = 9 /* data after the section length field*/ + program_info_length;
- int done_reading_stream_types = 0;
- while (!done_reading_stream_types)
- {
- unsigned char stream_type = get_bits(8);
- get_bits(3);
- unsigned int elementary_PID = get_bits(13);
- get_bits(4);
- unsigned int ES_info_length = get_bits(12);
-
- int i=0;
- unsigned char *ES_info_buf = (unsigned char *) malloc(ES_info_length);
- for (i=0; i < ES_info_length; i++)
- {
- ES_info_buf[i] = get_bits(8);
- }
-
- if (stream_type == 0x02)
- {
- if (stream->ts_number_video_pids <= kMaxNumberVideoPIDS)
- stream->ts_number_video_pids++;
- stream->ts_video_pids[stream->ts_number_video_pids-1] = elementary_PID;
- }
- else
- {
- // Defined audio stream types are 0x81 for AC-3/A52 audio and 0x03
- // for mpeg audio. But content producers seem to use other
- // values (0x04 and 0x06 have both been observed) so at this point
- // we say everything that isn't a video pid is audio then at the end
- // of hb_stream_title_scan we'll figure out which are really audio
- // by looking at the PES headers.
- i = stream->ts_number_audio_pids;
- if (i < kMaxNumberAudioPIDS)
- stream->ts_number_audio_pids++;
- stream->ts_audio_pids[i] = elementary_PID;
- stream->ts_audio_stream_type[i] = stream_type;
-
- if (ES_info_length > 0)
- {
- decode_element_descriptors(stream, i, ES_info_buf, ES_info_length);
- }
- }
-
- cur_pos += 5 /* stream header */ + ES_info_length;
-
- free(ES_info_buf);
-
- if (cur_pos >= section_length - 4 /* stop before the CRC */)
- done_reading_stream_types = 1;
- }
-
- free(descriptor_buf);
- return 1;
-}
-
-// ------------------------------------------------------------------------------------
-
-int build_program_map(unsigned char *buf, hb_stream_t *stream)
+ int i;
+ for (i = 0; i < program_info_length - 2; )
+ {
+ uint8_t tag, len;
+ tag = get_bits(&bb, 8);
+ len = get_bits(&bb, 8);
+ i += 2;
+ if ( i + len > program_info_length )
+ {
+ break;
+ }
+ if (tag == 0x05 && len >= 4)
+ {
+ // registration descriptor
+ stream->pmt_info.reg_desc = get_bits(&bb, 32);
+ i += 4;
+ len -= 4;
+ }
+ int j;
+ for ( j = 0; j < len; j++ )
+ {
+ get_bits(&bb, 8);
+ }
+ i += len;
+ }
+ for ( ; i < program_info_length; i++ )
+ {
+ get_bits(&bb, 8);
+ }
+
+ int cur_pos = 9 /* data after the section length field*/ + program_info_length;
+ int done_reading_stream_types = 0;
+ while (!done_reading_stream_types)
+ {
+ unsigned char stream_type = get_bits(&bb, 8);
+ get_bits(&bb, 3);
+ unsigned int elementary_PID = get_bits(&bb, 13);
+ get_bits(&bb, 4);
+ unsigned int ES_info_length = get_bits(&bb, 12);
+
+ int i=0;
+ unsigned char *ES_info_buf = (unsigned char *) malloc(ES_info_length);
+ for (i=0; i < ES_info_length; i++)
+ {
+ ES_info_buf[i] = get_bits(&bb, 8);
+ }
+
+ if ( index_of_pid( stream, elementary_PID ) < 0 )
+ {
+ // Defined audio stream types are 0x81 for AC-3/A52 audio
+ // and 0x03 for mpeg audio. But content producers seem to
+ // use other values (0x04 and 0x06 have both been observed)
+ // so at this point we say everything that isn't a video
+ // pid is audio then at the end of hb_stream_title_scan
+ // we'll figure out which are really audio by looking at
+ // the PES headers.
+ i = stream->ts_number_pids;
+ if (i < kMaxNumberDecodeStreams)
+ {
+ stream->ts_pids[i] = elementary_PID;
+ stream->ts_stream_type[i] = stream_type;
+ if (ES_info_length > 0)
+ {
+ decode_element_descriptors(stream, i, ES_info_buf,
+ ES_info_length);
+ }
+ stream->ts_stream_kind[i] = ts_stream_kind(stream, i);
+ ++stream->ts_number_pids;
+ }
+ }
+
+ cur_pos += 5 /* stream header */ + ES_info_length;
+
+ free(ES_info_buf);
+
+ if (cur_pos >= section_length - 4 /* stop before the CRC */)
+ done_reading_stream_types = 1;
+ }
+
+ return 1;
+}
+
+static int build_program_map(const uint8_t *buf, hb_stream_t *stream)
{
// Get adaption header info
int adapt_len = 0;
// Get pointer length - only valid in packets with a start flag
int pointer_len = 0;
- if (start && stream->pmt_info.reading)
- {
- // We just finished a bunch of packets - parse the program map details
- int decode_ok = 0;
- if (stream->pmt_info.tablebuf[0] == 0x02)
- decode_ok = decode_program_map(stream);
- free(stream->pmt_info.tablebuf);
- stream->pmt_info.tablebuf = NULL;
- stream->pmt_info.tablepos = 0;
- stream->pmt_info.reading = 0;
- if (decode_ok)
- return decode_ok;
- }
-
- if (start)
- {
- pointer_len = buf[4 + adapt_len] + 1;
- stream->pmt_info.tablepos = 0;
- }
- // Get Continuity Counter
- int continuity_counter = buf[3] & 0x0f;
- if (!start && (stream->pmt_info.current_continuity_counter + 1 != continuity_counter))
- {
- hb_log("build_program_map - Continuity Counter %d out of sequence - expected %d", continuity_counter, stream->pmt_info.current_continuity_counter+1);
- return 0;
- }
- stream->pmt_info.current_continuity_counter = continuity_counter;
- stream->pmt_info.reading |= start;
+
+ if (start)
+ {
+ pointer_len = buf[4 + adapt_len] + 1;
+ stream->pmt_info.tablepos = 0;
+ }
+ // Get Continuity Counter
+ int continuity_counter = buf[3] & 0x0f;
+ if (!start && (stream->pmt_info.current_continuity_counter + 1 != continuity_counter))
+ {
+ hb_log("build_program_map - Continuity Counter %d out of sequence - expected %d", continuity_counter, stream->pmt_info.current_continuity_counter+1);
+ return 0;
+ }
+ stream->pmt_info.current_continuity_counter = continuity_counter;
+ stream->pmt_info.reading |= start;
// Add the payload for this packet to the current buffer
- int amount_to_copy = 184 - adapt_len - pointer_len;
+ int amount_to_copy = 184 - adapt_len - pointer_len;
if (stream->pmt_info.reading && (amount_to_copy > 0))
{
- stream->pmt_info.tablebuf = realloc(stream->pmt_info.tablebuf, stream->pmt_info.tablepos + amount_to_copy);
-
+ stream->pmt_info.tablebuf = realloc(stream->pmt_info.tablebuf, stream->pmt_info.tablepos + amount_to_copy);
+
memcpy(stream->pmt_info.tablebuf + stream->pmt_info.tablepos, buf + 4 + adapt_len + pointer_len, amount_to_copy);
stream->pmt_info.tablepos += amount_to_copy;
}
+ if (stream->pmt_info.tablepos > 3)
+ {
+ // We have enough to check the section length
+ int length;
+ length = ((stream->pmt_info.tablebuf[1] << 8) +
+ stream->pmt_info.tablebuf[2]) & 0xFFF;
+ if (stream->pmt_info.tablepos > length + 1)
+ {
+ // We just finished a bunch of packets - parse the program map details
+ int decode_ok = 0;
+ if (stream->pmt_info.tablebuf[0] == 0x02)
+ decode_ok = decode_program_map(stream);
+ free(stream->pmt_info.tablebuf);
+ stream->pmt_info.tablebuf = NULL;
+ stream->pmt_info.tablepos = 0;
+ stream->pmt_info.reading = 0;
+ if (decode_ok)
+ return decode_ok;
+ }
+
+ }
return 0;
}
-int decode_PAT(unsigned char *buf, hb_stream_t *stream)
+static int decode_PAT(const uint8_t *buf, hb_stream_t *stream)
{
unsigned char tablebuf[1024];
unsigned int tablepos = 0;
-
+
int reading = 0;
{
memcpy(tablebuf + tablepos, buf + 4 + adapt_len + 1, pointer_len - 1);
-
+
unsigned int pos = 0;
//while (pos < tablepos)
{
- set_buf(tablebuf + pos, tablepos - pos, 0);
-
- unsigned char section_id = get_bits(8);
- get_bits(4);
- unsigned int section_len = get_bits(12);
- get_bits(16); // transport_id
- get_bits(2);
- get_bits(5); // version_num
- get_bits(1); // current_next
- get_bits(8); // section_num
- get_bits(8); // last_section
+ bitbuf_t bb;
+ set_buf(&bb, tablebuf + pos, tablepos - pos, 0);
+
+ unsigned char section_id = get_bits(&bb, 8);
+ get_bits(&bb, 4);
+ unsigned int section_len = get_bits(&bb, 12);
+ get_bits(&bb, 16); // transport_id
+ get_bits(&bb, 2);
+ get_bits(&bb, 5); // version_num
+ get_bits(&bb, 1); // current_next
+ get_bits(&bb, 8); // section_num
+ get_bits(&bb, 8); // last_section
switch (section_id)
{
section_len -= 5; // Already read transport stream ID, version num, section num, and last section num
section_len -= 4; // Ignore the CRC
int curr_pos = 0;
- stream->ts_number_pat_entries = 0;
+ stream->ts_number_pat_entries = 0;
while ((curr_pos < section_len) && (stream->ts_number_pat_entries < kMaxNumberPMTStreams))
{
- unsigned int pkt_program_num = get_bits(16);
- stream->pat_info[stream->ts_number_pat_entries].program_number = pkt_program_num;
-
- get_bits(3); // Reserved
+ unsigned int pkt_program_num = get_bits(&bb, 16);
+ stream->pat_info[stream->ts_number_pat_entries].program_number = pkt_program_num;
+
+ get_bits(&bb, 3); // Reserved
if (pkt_program_num == 0)
{
- get_bits(13); // pkt_network_id
+ get_bits(&bb, 13); // pkt_network_id
}
else
{
- unsigned int pkt_program_map_PID = get_bits(13);
+ unsigned int pkt_program_map_PID = get_bits(&bb, 13);
stream->pat_info[stream->ts_number_pat_entries].program_map_PID = pkt_program_map_PID;
}
curr_pos += 4;
- stream->ts_number_pat_entries++;
+ stream->ts_number_pat_entries++;
}
}
break;
return 1;
}
-static int flushbuf(hb_stream_t *stream)
-{
- int old_write_index = stream->ps_current_write_buffer_index;
-
- // Flip the buffers and start moving on to the next
- stream->ps_current_write_buffer_index++;
- if (stream->ps_current_write_buffer_index > kNumDecodeBuffers-1)
- stream->ps_current_write_buffer_index = 0;
-
- if ( (stream->ps_decode_buffer[stream->ps_current_write_buffer_index].len != 0) || (stream->ps_decode_buffer[stream->ps_current_write_buffer_index].write_pos != 0) )
- {
- hb_log("flushbuf - new buffer (index %d) has non zero length and write position !", stream->ps_current_write_buffer_index);
- return 0;
- }
-
- stream->ps_current_read_buffer_index = old_write_index;
- stream->ps_decode_buffer[stream->ps_current_read_buffer_index].read_pos = 0;
-
- return 1;
-}
-
-static int fwrite64(void* buf, int elsize, int elnum, hb_stream_t* stream)
-{
- int size = elsize;
- if (elnum > 1)
- size *= elnum;
-
- int written = 0;
- int current_write_index = stream->ps_current_write_buffer_index;
-
- if (size <= stream->ps_decode_buffer[current_write_index].size - stream->ps_decode_buffer[current_write_index].write_pos)
- {
- memcpy(stream->ps_decode_buffer[current_write_index].data + stream->ps_decode_buffer[current_write_index].write_pos, buf, size);
- stream->ps_decode_buffer[current_write_index].write_pos += size;
- stream->ps_decode_buffer[current_write_index].len = stream->ps_decode_buffer[current_write_index].write_pos;
- written = size;
- }
- else
- {
- memcpy(stream->ps_decode_buffer[current_write_index].data + stream->ps_decode_buffer[current_write_index].write_pos, buf, stream->ps_decode_buffer[current_write_index].size - stream->ps_decode_buffer[current_write_index].write_pos);
- written += stream->ps_decode_buffer[current_write_index].size - stream->ps_decode_buffer[current_write_index].write_pos;
- stream->ps_decode_buffer[current_write_index].write_pos += stream->ps_decode_buffer[current_write_index].size - stream->ps_decode_buffer[current_write_index].write_pos;
- stream->ps_decode_buffer[current_write_index].len = stream->ps_decode_buffer[current_write_index].write_pos;
-
- if (flushbuf(stream))
- {
- // FLushing the buffer will have change the current write buffer
- current_write_index = stream->ps_current_write_buffer_index;
-
- memcpy(stream->ps_decode_buffer[current_write_index].data, (unsigned char*)buf + written, size - written);
- stream->ps_decode_buffer[current_write_index].write_pos += size - written;
- stream->ps_decode_buffer[current_write_index].len = stream->ps_decode_buffer[current_write_index].write_pos;
- written += size - written;
- }
- }
-
-
- if (elnum == 1 && written == size)
- return 1;
- else
- return written / elsize;
-}
-
-static int write_pack(hb_stream_t* stream, int64_t time)
-{
- unsigned char buf[64];
- set_buf(buf, 64, 1); // clear buffer
-
- int64_t ext_time = time % 300;
- time = time / 300;
-
- set_bits(0x000001ba, 32); // pack id 32
- set_bits(1, 2); // 0x01 2
- set_bits((unsigned int)(time >> 30), 3); // system_clock_reference_base 3
- set_bits(1, 1); // marker_bit 1
- set_bits((unsigned int)(time >> 15), 15); // system_clock_reference_base 15
- set_bits(1, 1); // marker_bit 1
- set_bits((unsigned int)time, 15); // system_clock_reference_base1 15
- set_bits(1, 1); // marker_bit 1
- set_bits((unsigned int)ext_time, 9); // system_clock_reference_extension 9
- set_bits(1, 1); // marker_bit 1
- set_bits(DEMUX, 22); // program_mux_rate 22
- set_bits(1, 1); // marker_bit 1
- set_bits(1, 1); // marker_bit 1
- set_bits(31, 5); // reserved 5
- set_bits(0, 3); // pack_stuffing_length 3
-
- return fwrite64(buf, buf_size(), 1, stream) == 1;
-}
-
-static int pad_buffer(hb_stream_t *stream, int pad)
-{
- pad -= 6;
-
- char buf[6];
- buf[0] = '\x0'; buf[1] = '\x0'; buf[2] = '\x1'; buf[3] = '\xbe';
- buf[4] = pad >> 8; buf[5] = pad & 0xff;
-
- if (fwrite64(buf, 6, 1, stream) != 1)
- return 0;
-
- unsigned char padbyte = 0xff;
- int i=0;
- for (i = 0; i < pad; i++)
- {
- if (fwrite64(&padbyte, 1, 1, stream) != 1)
- return 0;
- }
-
- return 1;
-}
-
-int make_pes_header(unsigned char* buf, int streamid, int len, int64_t PTS, int64_t DTS)
-{
- int hdrlen = 0;
- int PTS_DTS_flags = 0;
- if (PTS != -1)
- {
- if (DTS != -1)
- {
- PTS_DTS_flags = 3;
- hdrlen += 10;
- }
- else
- {
- PTS_DTS_flags = 2;
- hdrlen += 5;
- }
- }
-
- set_buf(buf, 9 + hdrlen, 1); // clear the buffer
-
- set_bits(0x000001, 24); // packet_start_code_prefix 24
- set_bits((unsigned int)streamid, 8); // directory_stream_id 8
- set_bits(len, 16); // PES_packet_length 16
- set_bits(0x2, 2); // '10' 2
- set_bits(0, 2); // PES_scrambling_control 2
- set_bits(1, 1); // PES_priority 1
- set_bits(0, 1); // data_alignment_indicator 1
- set_bits(0, 1); // copyright 1
- set_bits(0, 1); // original_or_copy 1
- set_bits(PTS_DTS_flags, 2); // PTS_DTS_flags 2
- set_bits(0, 1); // ESCR_flag 1
- set_bits(0, 1); // ES_rate_flag 1
- set_bits(0, 1); // DSM_trick_mode_flag 1
- set_bits(0, 1); // additional_copy_info_flag 1
- set_bits(0, 1); // PES_CRC_flag 1
- set_bits(0, 1); // PES_extension_flag 1
- set_bits(hdrlen, 8); // PES_header_data_length 8
-
- if (PTS_DTS_flags == 2)
- {
- set_bits(2, 4); // '0010' 4
- set_bits((unsigned int)(PTS >> 30), 3); // PTS [32..30] 3
- set_bits(1, 1); // marker bit 1
- set_bits((unsigned int)(PTS >> 15), 15); // PTS [29..15] 15
- set_bits(1, 1); // marker bit 1
- set_bits((unsigned int)PTS, 15); // PTS [14..0] 15
- set_bits(1, 1); // marker bit 1
- }
- else if (PTS_DTS_flags == 3)
- {
- set_bits(3, 4); // '0011' 4
- set_bits((unsigned int)(PTS >> 30), 3); // PTS [32..30] 3
- set_bits(1, 1); // marker bit 1
- set_bits((unsigned int)(PTS >> 15), 15); // PTS [29..15] 15
- set_bits(1, 1); // marker bit 1
- set_bits((unsigned int)PTS, 15); // PTS [14..0] 15
- set_bits(1, 1); // marker bit 1
- set_bits(1, 4); // '0001' 4
- set_bits((unsigned int)(DTS >> 30), 3); // DTS [32..30] 3
- set_bits(1, 1); // marker bit 1
- set_bits((unsigned int)(DTS >> 15), 15); // DTS [29..15] 15
- set_bits(1, 1); // marker bit 1
- set_bits((unsigned int)DTS, 15); // DTS [14..0] 15
- set_bits(1, 1); // marker bit 1
- }
-
- return buf_size();
-}
-
-int generate_output_data(hb_stream_t *stream, int write_ac3, int curstream, int pid)
-{
- unsigned char ac3_substream_id[4];
- int ac3len = 0;
-
- if (write_ac3)
- {
- // Make a four byte DVD ac3 stream header
- int ssid = (curstream - stream->ts_number_video_pids) & 0xf;
- ac3_substream_id[0] = 0x80 | ssid; // substream id
- ac3_substream_id[1] = 0x01; // number of sync words
- ac3_substream_id[2] = 0x00; // first offset (16 bits)
- ac3_substream_id[3] = 0x02;
- ac3len = 4;
- }
-
- int written = 0; // Bytes we've written to output file
- int pos = 0; // Position in PES packet buffer
-
- for (;;)
- {
- if ((stream->ps_decode_buffer[stream->ps_current_write_buffer_index].len % HB_DVD_READ_BUFFER_SIZE) != 0)
- {
- hb_log("write_output_stream - Packet's not falling on read buffer size boundries!");
- return 1;
- }
-
- // Get total length of this pack
- int len = min(14 + ac3len + stream->ts_packetpos[curstream] - pos, HB_DVD_READ_BUFFER_SIZE);
-
- // Figure out stuffing (if we have less than 16 bytes left)
- int stuffing = 0;
- if (len < HB_DVD_READ_BUFFER_SIZE && HB_DVD_READ_BUFFER_SIZE - len < 16)
- {
- stuffing = HB_DVD_READ_BUFFER_SIZE - len;
- len += stuffing;
- }
-
- // Write out pack header
- off_t file_offset = ftello(stream->file_handle);
- int64_t packet_time = (file_offset * CLOCKRATE / STREAMRATE) + 0 /*file_time*/;
- if (!write_pack(stream, packet_time))
- {
- hb_log("write_output_stream - Couldn't write pack header!");
- return 1;
- }
-
- stream->ts_packetbuf[curstream][pos + 3] =
- stream->ts_streamid[curstream];
-
- // Packet length..
- // Subtract pack size (14) and pes id and len (6) from lenth
- stream->ts_packetbuf[curstream][pos + 4] = (len - 6 - 14) >> 8; stream->ts_packetbuf[curstream][pos + 5] = (len - 6 - 14) & 0xFF;
-
- // Add any stuffing bytes to header extra len
- int hdrsize = 9 + stream->ts_packetbuf[curstream][pos + 8];
- stream->ts_packetbuf[curstream][pos + 8] += stuffing; // Add stuffing to header bytes
-
- // Write out id, streamid, len
- if (fwrite64(stream->ts_packetbuf[curstream] + pos, hdrsize, 1, stream) != 1) // Write pes id, streamid, and len
- {
- hb_log("write_output_stream - Failed to write output file!");
- return 1;
- }
-
- // Write stuffing
- int i=0;
- for (i = 0; i < stuffing; i++) // Write any stuffing bytes
- {
- unsigned char stuff = 0xff;
- if (fwrite64(&stuff, 1, 1, stream) != 1)
- {
- hb_log("write_output_stream - Failed to write output file!");
- return 1;
- }
- }
-
- // Write ac3 streamid
- if (ac3len != 0)
- {
- if (fwrite64(ac3_substream_id, ac3len, 1, stream) != 1)
- {
- hb_log("write_output_stream - Failed to write output file!");
- return 1;
- }
- }
-
- // Write rest of data len minus headersize (9) stuffing, and pack size (14)
- if (fwrite64(stream->ts_packetbuf[curstream] + pos + hdrsize, len - hdrsize - 14 - stuffing - ac3len, 1, stream) != 1) // Write data bytes
- {
- hb_log("write_output_stream - Failed to write output file!");
- return 1;
- }
- written += len;
-
- // Add len minus stuff we added like the pack (14) and the stuffing.
- pos += len - 14 - stuffing - ac3len;
- if (pos == stream->ts_packetpos[curstream])
- break;
-
- // Add pes header for next packet
- pos -= 9;
- make_pes_header(stream->ts_packetbuf[curstream] + pos, stream->ts_streamid[curstream], 0, -1, -1);
- }
-
- stream->ts_packetpos[curstream] = 0;
- stream->ts_streamcont[curstream] = -1;
-
- // Write padding
- if ((written % HB_DVD_READ_BUFFER_SIZE) != 0)
- {
- int left = HB_DVD_READ_BUFFER_SIZE - (written % HB_DVD_READ_BUFFER_SIZE);
-
- // Pad out to HB_DVD_READ_BUFFER_SIZE bytes
- if (!pad_buffer(stream, left))
- {
- hb_log("write_output_stream - Couldn't write pad buffer!");
- return 1;
- }
- }
-
- return 0;
-}
-
-static void hb_ts_handle_mpeg_audio(hb_stream_t *stream, int curstream, unsigned char* buf, int adapt_len )
-{
- // Although we don't have AC3/A52 audio here we can still use the same structure to record this useful information.
-
- stream->a52_info[curstream - stream->ts_number_video_pids].flags = A52_STEREO;
- stream->a52_info[curstream - stream->ts_number_video_pids].rate = 48000 /*Hz*/;
- stream->a52_info[curstream - stream->ts_number_video_pids].bitrate = 384000 /*Bps*/;
-}
-
-static int hb_ts_handle_ac3_audio(hb_stream_t *stream, int curstream, unsigned char* buf, int adapt_len )
-{
- int spos, dpos;
-
- // Make sure we start with 0x0b77
- if (stream->ts_packetbuf[curstream][9 + stream->ts_packetbuf[curstream][8]] != 0x0b || stream->ts_packetbuf[curstream][9 + stream->ts_packetbuf[curstream][8] + 1] != 0x77)
- {
- spos = 9 + stream->ts_packetbuf[curstream][8];
- dpos = 9 + stream->ts_packetbuf[curstream][8];
- while (spos <= stream->ts_packetpos[curstream] - 2 && !(stream->ts_packetbuf[curstream][spos] == 0x0b && stream->ts_packetbuf[curstream][spos + 1] == 0x77))
- spos++;
-
- if (!(stream->ts_packetbuf[curstream][spos] == 0x0b && stream->ts_packetbuf[curstream][spos + 1] == 0x77))
- {
- hb_log("hb_ts_stream_decode - Couldn't sync AC3 packet!");
- stream->ts_skipbad[curstream] = 1;
- return 0;
- }
-
- while (spos < stream->ts_packetpos[curstream])
- {
- stream->ts_packetbuf[curstream][dpos] = stream->ts_packetbuf[curstream][spos];
- spos++;
- dpos++;
- }
- stream->ts_packetpos[curstream] = dpos;
- }
-
- // Check the next packet to make sure IT starts with a 0x0b77
- int plen = 0;
- plen = 9 + buf[4 + adapt_len + 8];
- int pstart = 4 + adapt_len + plen;
- if (buf[pstart] != 0x0b || buf[pstart + 1] != 0x77)
- {
- spos = pstart;
- while (spos < 188 - 2 && !(buf[spos] == 0x0b && buf[spos + 1] == 0x77))
- {
- stream->ts_packetbuf[curstream][stream->ts_packetpos[curstream]] = buf[spos];
- stream->ts_packetpos[curstream]++;
- spos++;
- }
-
- if (!(buf[spos] == 0x0b && buf[spos + 1] == 0x77))
- {
- hb_log("hb_ts_stream_decode - Couldn't sync AC3 packet!");
- stream->ts_skipbad[curstream] = 1;
- return 0;
- }
-
- adapt_len = spos - 4 - plen;
-
- dpos = spos - 1;
- spos = pstart - 1;
- while (spos >= pstart - plen)
- {
- buf[dpos] = buf[spos];
- spos--;
- dpos--;
- }
- }
-
- int flags, rate, bitrate;
- if( a52_syncinfo( &buf[pstart], &flags, &rate, &bitrate ) )
- {
- stream->a52_info[curstream - stream->ts_number_video_pids].flags = flags;
- stream->a52_info[curstream - stream->ts_number_video_pids].rate = rate;
- stream->a52_info[curstream - stream->ts_number_video_pids].bitrate = bitrate;
- }
- return 1;
-}
-
static void hb_ts_stream_find_pids(hb_stream_t *stream)
{
- unsigned char buf[188];
-
- // align to first packet
- align_to_next_packet(stream->file_handle);
-
- // Read the Transport Stream Packets (188 bytes each) looking at first for PID 0 (the PAT PID), then decode that
- // to find the program map PID and then decode that to get the list of audio and video PIDs
-
- int bytesReadInPacket = 0;
- for (;;)
- {
- // Try to read packet..
- int bytesRead;
- if ((bytesRead = fread(buf+bytesReadInPacket, 1, 188-bytesReadInPacket, stream->file_handle)) != 188-bytesReadInPacket)
- {
- if (bytesRead < 0)
- bytesRead = 0;
- bytesReadInPacket += bytesRead;
-
- hb_log("hb_ts_stream_find_pids - end of file");
- break;
- }
- else
- {
- bytesReadInPacket = 0;
- }
-
- // Check sync byte
- if ((buf[0] != 0x47) && (buf[0] != 0x72) && (buf[0] != 0x29))
- {
- hb_log("hb_ts_stream_find_pids - Bad transport packet (no sync byte 0x47)!");
- int i = 0;
- for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
- stream->ts_skipbad[i] = 1;
- continue;
- }
-
- // Get pid
- int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
-
+ // To be different from every other broadcaster in the world, New Zealand TV
+ // changes PMTs (and thus video & audio PIDs) when 'programs' change. Since
+ // we may have the tail of the previous program at the beginning of this
+ // file, take our PMT from the middle of the file.
+ fseeko(stream->file_handle, 0, SEEK_END);
+ uint64_t fsize = ftello(stream->file_handle);
+ fseeko(stream->file_handle, fsize >> 1, SEEK_SET);
+ align_to_next_packet(stream);
+
+ // Read the Transport Stream Packets (188 bytes each) looking at first for PID 0 (the PAT PID), then decode that
+ // to find the program map PID and then decode that to get the list of audio and video PIDs
+
+ for (;;)
+ {
+ const uint8_t *buf = next_packet( stream );
+
+ if ( buf == NULL )
+ {
+ hb_log("hb_ts_stream_find_pids - end of file");
+ break;
+ }
+
+ // Get pid
+ int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
+
if ((pid == 0x0000) && (stream->ts_number_pat_entries == 0))
- {
- decode_PAT(buf, stream);
- continue;
- }
-
- int pat_index = 0;
- for (pat_index = 0; pat_index < stream->ts_number_pat_entries; pat_index++)
- {
- // There are some streams where the PAT table has multiple entries as if their are
- // multiple programs in the same transport stream, and yet there's actually only one
- // program really in the stream. This seems to be true for transport streams that
- // originate in the HDHomeRun but have been output by EyeTV's export utility. What I think
- // is happening is that the HDHomeRun is sending the entire transport stream as broadcast,
- // but the EyeTV is only recording a single (selected) program number and not rewriting the
- // PAT info on export to match what's actually on the stream.
- // Until we have a way of handling multiple programs per transport stream elegantly we'll match
- // on the first pat entry for which we find a matching program map PID. The ideal solution would
- // be to build a title choice popup from the PAT program number details and then select from
- // their - but right now the API's not capable of that.
- if (pid == stream->pat_info[pat_index].program_map_PID)
- {
- if (build_program_map(buf, stream) > 0)
- break;
- }
- }
- // Keep going until we have a complete set of PIDs
- if ((stream->ts_number_video_pids > 0) && (stream->ts_number_audio_pids > 0))
- break;
- }
-
- hb_log("hb_ts_stream_find_pids - found the following PIDS");
- hb_log(" Video PIDS : ");
- int i=0;
- for (i=0; i < stream->ts_number_video_pids; i++)
- {
- hb_log(" 0x%x (%d)", stream->ts_video_pids[i], stream->ts_video_pids[i]);
- }
- hb_log(" Audio PIDS : ");
- for (i = 0; i < stream->ts_number_audio_pids; i++)
- {
- hb_log(" 0x%x (%d)", stream->ts_audio_pids[i], stream->ts_audio_pids[i]);
- }
+ {
+ decode_PAT(buf, stream);
+ continue;
+ }
+
+ int pat_index = 0;
+ for (pat_index = 0; pat_index < stream->ts_number_pat_entries; pat_index++)
+ {
+ // There are some streams where the PAT table has multiple entries as if their are
+ // multiple programs in the same transport stream, and yet there's actually only one
+ // program really in the stream. This seems to be true for transport streams that
+ // originate in the HDHomeRun but have been output by EyeTV's export utility. What I think
+ // is happening is that the HDHomeRun is sending the entire transport stream as broadcast,
+ // but the EyeTV is only recording a single (selected) program number and not rewriting the
+ // PAT info on export to match what's actually on the stream.
+ // Until we have a way of handling multiple programs per transport stream elegantly we'll match
+ // on the first pat entry for which we find a matching program map PID. The ideal solution would
+ // be to build a title choice popup from the PAT program number details and then select from
+ // their - but right now the API's not capable of that.
+ if (stream->pat_info[pat_index].program_number != 0 &&
+ pid == stream->pat_info[pat_index].program_map_PID)
+ {
+ if (build_program_map(buf, stream) > 0)
+ break;
+ }
+ }
+ // Keep going until we have a complete set of PIDs
+ if ( index_of_video( stream ) >= 0 )
+ break;
+ }
+
+ hb_log("hb_ts_stream_find_pids - found the following PIDS");
+ hb_log(" Video PIDS : ");
+ int i;
+ for (i=0; i < stream->ts_number_pids; i++)
+ {
+ if ( stream->ts_stream_kind[i] == V )
+ {
+ hb_log( " 0x%x type %s (0x%x)",
+ stream->ts_pids[i],
+ stream_type_name(stream->ts_stream_type[i]),
+ stream->ts_stream_type[i]);
+ }
+ }
+ hb_log(" Audio PIDS : ");
+ for (i = 0; i < stream->ts_number_pids; i++)
+ {
+ if ( stream->ts_stream_kind[i] != V )
+ {
+ hb_log( " 0x%x type %s (0x%x)",
+ stream->ts_pids[i],
+ stream_type_name(stream->ts_stream_type[i]),
+ stream->ts_stream_type[i] );
+ }
+ }
}
-int index_of_video_pid(int pid, hb_stream_t *stream)
+
+static void fwrite64( hb_stream_t *stream, void *buf, int len )
+{
+ if ( len > 0 )
+ {
+ int pos = stream->fwrite_buf->size;
+ if ( pos + len > stream->fwrite_buf->alloc )
+ {
+ int size = MAX(stream->fwrite_buf->alloc * 2, pos + len);
+ hb_buffer_realloc(stream->fwrite_buf, size);
+ }
+ memcpy( &(stream->fwrite_buf->data[pos]), buf, len );
+ stream->fwrite_buf->size += len;
+ }
+}
+
+// convert a PES PTS or DTS to an int64
+static int64_t pes_timestamp( const uint8_t *pes )
{
- int found_pid = -1, i = 0;
-
- for (i = 0; (i < stream->ts_number_video_pids) && (found_pid < 0); i++)
- {
- if (pid == stream->ts_video_pids[i])
- found_pid = i;
- }
- return found_pid;
+ int64_t ts = ( (uint64_t)(pes[0] & 0xe ) << 29 );
+ ts |= ( pes[1] << 22 ) | ( ( pes[2] >> 1 ) << 15 ) |
+ ( pes[3] << 7 ) | ( pes[4] >> 1 );
+ return ts;
}
-int index_of_audio_pid(int pid, hb_stream_t *stream)
+static void generate_output_data(hb_stream_t *stream, int curstream)
{
- int i = 0, found_pid = -1;
+ hb_buffer_t *buf = stream->fwrite_buf;
+ uint8_t *tdat = stream->ts_buf[curstream]->data;
+
+ buf->id = stream->ts_pids[curstream];
+ switch (stream->ts_stream_kind[curstream])
+ {
+ case A:
+ buf->type = AUDIO_BUF;
+ break;
+
+ case V:
+ buf->type = VIDEO_BUF;
+ break;
+
+ default:
+ buf->type = OTHER_BUF;
+ break;
+ }
+
+ // check if this packet was referenced to an older pcr and if that
+ // pcr was significantly different than the one we're using now.
+ // (the reason for the uint cast on the pcr difference is that the
+ // difference is significant if it advanced by more than 200ms or if
+ // it went backwards by any amount. The negative numbers look like huge
+ // unsigned ints so the cast allows both conditions to be checked at once.
+ int bufpcr = stream->ts_buf[curstream]->cur;
+ int curpcr = stream->ts_pcr_out;
+ if ( bufpcr && bufpcr < curpcr &&
+ (uint64_t)(stream->ts_pcrhist[curpcr & 3] - stream->ts_pcrhist[bufpcr & 3]) > 200*90LL )
+ {
+ // we've sent up a new pcr but have a packet referenced to an
+ // old pcr and the difference was enough to trigger a discontinuity
+ // correction. smash the timestamps or we'll mess up the correction.
+ buf->start = -1;
+ buf->renderOffset = -1;
+ }
+ else
+ {
+ if ( stream->ts_pcr_out != stream->ts_pcr_in )
+ {
+ // we have a new pcr
+ stream->ts_pcr_out = stream->ts_pcr_in;
+ buf->stop = stream->ts_pcr;
+ stream->ts_pcrhist[stream->ts_pcr_out & 3] = stream->ts_pcr;
+ }
+ else
+ {
+ buf->stop = -1;
+ }
+
+ // put the PTS & possible DTS into 'start' & 'renderOffset' then strip
+ // off the PES header.
+ if ( tdat[7] & 0xc0 )
+ {
+ buf->start = pes_timestamp( tdat + 9 );
+ buf->renderOffset = ( tdat[7] & 0x40 )? pes_timestamp( tdat + 14 ) :
+ buf->start;
+ }
+ else
+ {
+ buf->start = -1;
+ buf->renderOffset = -1;
+ }
+ }
+ int hlen = tdat[8] + 9;
- for (i = 0; (i < stream->ts_number_audio_pids) && (found_pid < 0); i++)
- {
- if (pid == stream->ts_audio_pids[i])
- found_pid = i;
- }
- return found_pid;
+ fwrite64( stream, tdat + hlen, stream->ts_pos[curstream] - hlen );
+
+ stream->ts_pos[curstream] = 0;
+ stream->ts_buf[curstream]->size = 0;
}
-int index_of_pid(int pid, hb_stream_t *stream)
+static void hb_ts_stream_append_pkt(hb_stream_t *stream, int idx, const uint8_t *buf, int len)
{
- int found_pid = -1;
-
- if ((found_pid = index_of_video_pid(pid, stream)) >= 0)
- return found_pid;
-
- if ((found_pid = index_of_audio_pid(pid, stream)) >= 0)
- return found_pid;
-
- return found_pid;
+ if (stream->ts_pos[idx] + len > stream->ts_buf[idx]->alloc)
+ {
+ int size;
+
+ size = MAX(stream->ts_buf[idx]->alloc * 2, stream->ts_pos[idx] + len);
+ hb_buffer_realloc(stream->ts_buf[idx], size);
+ }
+ memcpy(stream->ts_buf[idx]->data + stream->ts_pos[idx], buf, len);
+ stream->ts_pos[idx] += len;
+ stream->ts_buf[idx]->size += len;
}
/***********************************************************************
***********************************************************************
*
**********************************************************************/
-static void hb_ts_stream_decode(hb_stream_t *stream)
-{
- unsigned char buf[188];
- int curstream;
- int doing_iframe;
-
- int i = 0;
- for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
- {
-// stream->ts_skipbad[kAudioStream] = stream->ts_skipbad[kVideoStream] = 0;
- stream->ts_skipbad[i] = 0;
- }
-
- doing_iframe = 0;
-
- if ((stream->ts_number_video_pids == 0) || (stream->ts_number_audio_pids == 0))
- {
- hb_log("hb_ts_stream_decode - no Video or Audio PID selected, cannot decode transport stream");
- return;
- }
-
- int curr_write_buffer_index = stream->ps_current_write_buffer_index;
-
- // Write output data until a buffer switch occurs.
- while (curr_write_buffer_index == stream->ps_current_write_buffer_index)
- {
- if ((fread(buf, 188, 1, stream->file_handle)) != 1)
- {
- // end of file - we didn't finish filling our ps write buffer
- // so just discard the remainder (the partial buffer is useless)
- hb_log("hb_ts_stream_decode - eof");
- stream->ps_decode_buffer[stream->ps_current_write_buffer_index].len = 0;
- return;
- }
-
- // Check sync byte
- if ((buf[0] != 0x47) && (buf[0] != 0x72) && (buf[0] != 0x29))
- {
- off_t pos = ftello(stream->file_handle);
- hb_log("hb_ts_stream_decode - no sync byte 0x47 @ %lld", pos);
- for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
- {
- // stream->ts_skipbad[kAudioStream] = stream->ts_skipbad[kVideoStream] = 1;
- stream->ts_skipbad[i] = 1;
- }
- continue;
- }
-
- // Get pid
- int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
-
- // Get the pos and buf - we organize our streams as 'n' video streams then 'm' audio streams
- int index_of_selected_pid;
- if ((index_of_selected_pid = index_of_video_pid(pid,stream)) < 0)
- {
- // Not a video PID perhaps audio ?
- if ((index_of_selected_pid = index_of_audio_pid(pid,stream)) < 0)
- {
- // not a pid we want
- continue;
- }
- else
- {
- curstream = stream->ts_number_video_pids + index_of_selected_pid;
- }
- }
- else
- curstream = index_of_selected_pid;
-
- // Get start code
- int start;
- start = (buf[1] & 0x40) != 0;
-
- if (!start && stream->ts_skipbad[curstream])
- continue;
-
- // Get error
- int errorbit = (buf[1] & 0x80) != 0;
- if (errorbit)
- {
- hb_log("hb_ts_stream_decode - Error bit set in packet");
- stream->ts_skipbad[curstream] = 1;
- continue;
- }
-
- // Get adaption header info
- int adaption = (buf[3] & 0x30) >> 4;
- int adapt_len = 0;
-
- // Get continuity
- // Continuity only increments for adaption values of 0x3 or 0x01
- int continuity = (buf[3] & 0xF);
- if ((stream->ts_streamcont[curstream] != -1) && ((adaption & 0x01) != 0))
- {
- if (continuity != ((stream->ts_streamcont[curstream] + 1) & 0xF))
- {
- hb_log("hb_ts_stream_decode - Bad continuity code in packet");
- stream->ts_skipbad[curstream] = 1;
- continue;
- }
- stream->ts_streamcont[curstream] = continuity;
- }
-
- // Get adaption header size
- if (adaption == 0)
- {
- hb_log("hb_ts_stream_decode - Bad adaption code (code was 0)!");
- for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
- {
- stream->ts_skipbad[i] = 1;
- }
- continue;
- }
- else if (adaption == 0x2)
- adapt_len = 184;
- else if (adaption == 0x3)
- {
- adapt_len = buf[4] + 1;
- if (adapt_len > 184)
- {
- hb_log("hb_ts_stream_decode - Invalid adapt len %d", adapt_len);
- for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
- {
- stream->ts_skipbad[i] = 1;
- }
- }
- }
-
- // HBO is slick, it doesn't bother to sync AC3 packets with PES elementary stream packets.. so
- // we have to swizzle them together! (ARGHH!)
- if (start && curstream >= stream->ts_number_video_pids &&
- stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids]
- != 0x03)
- {
- // Is there an AC3 packet start 0b77 code in this packet??
- int sync_found = 0;
- unsigned char *p = buf + 4 + adapt_len;
- while (p <= buf + 186)
- {
- if (p[0] == 0x0b && p[1] == 0x77)
- {
- sync_found = 1;
- break;
- }
- p++;
- }
-
- // Couldn't find an AC3 sync start in this packet.. don't make a PES packet!
- if (!sync_found)
- {
- adapt_len = 184;
- start = 0;
- }
- }
-
- // Found a random access point (now we can start a frame/audio packet..)
- if (start)
- {
- // Check to see if this is an i_frame (group of picture start)
- if (pid == stream->ts_video_pids[0])
- {
- // Look for the Group of Pictures packet.. indicates this is an I-Frame packet..
- doing_iframe = 0;
- unsigned int strid = 0;
- int i = 4;
- for (i = 4 + adapt_len; i < 188; i++)
- {
- strid = (strid << 8) | buf[i];
- if (strid == 0x000001B8) // group_start_code
- {
- // found a Group of Pictures header, subsequent picture must be an I-frame
- doing_iframe = 1;
- }
- else if (strid == 0x000001B3) // sequence_header code
- {
- doing_iframe = 1;
- }
- else if (strid == 0x00000100) // picture_start_code
- {
- // picture_header, let's see if it's an I-frame
- if (i<187)
- {
- // check if picture_coding_type == 1
- if ((buf[i+2] & (0x7 << 3)) == (1 << 3))
- {
- // found an I-frame picture
- doing_iframe = 1;
- }
- }
- }
-
- if (doing_iframe)
- {
- if (!stream->ts_foundfirst[curstream])
- {
- stream->ts_foundfirst[curstream] = 1;
-// first_video_PCR = PCR;
- }
- break;
- }
- }
- }
- else if (index_of_audio_pid(pid, stream) >= 0)
- {
- if (stream->ts_foundfirst[0]) // Set audio found first ONLY after first video frame found. There's an assumption here that stream '0' is a video stream
- {
- stream->ts_foundfirst[curstream] |= 1;
- }
- }
-
- // If we were skipping a bad packet, start fresh on this new PES packet..
- if (stream->ts_skipbad[curstream] == 1)
- {
- stream->ts_skipbad[curstream] = 0;
- stream->ts_packetpos[curstream] = 0;
- }
-
- // Get the continuity code of this packet
- stream->ts_streamcont[curstream] = continuity;
- }
-
- // Write a 2048 byte program stream packet..
- if (start && stream->ts_packetpos[curstream] > 0 && stream->ts_foundfirst[curstream] && !stream->ts_skipbad[curstream])
- {
- // Save the substream id block so we can added it to subsequent blocks
- int write_ac3 = 0;
- if (curstream >= stream->ts_number_video_pids)
- {
- // Curstream is a zero based index of streams and includes both video and audio streams, so we must subtract the numver of video streams
- // from the indes value used here since ts_audio_stream_type is indexed only by audio streams.
- if (stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids] == 0x03)
- {
- hb_ts_handle_mpeg_audio(stream, curstream, buf, adapt_len);
- }
- else
- {
- write_ac3 = hb_ts_handle_ac3_audio(stream, curstream, buf, adapt_len);
- }
- }
-
- if (generate_output_data(stream, write_ac3, curstream, pid) != 0)
- return ;
- }
-
- // Add the payload for this packet to the current buffer
- if (!stream->ts_skipbad[curstream] && stream->ts_foundfirst[curstream] &&
- (184 - adapt_len) > 0)
- {
- // XXX this shouldn't happen but we'll be paranoid
- if (stream->ts_packetpos[curstream] + 184 - adapt_len > 1024*1024)
+int hb_ts_decode_pkt( hb_stream_t *stream, const uint8_t * pkt, hb_buffer_t *obuf )
+{
+ /*
+ * stash the output buffer pointer in our stream so we don't have to
+ * pass it & its original value to everything we call.
+ */
+ obuf->size = 0;
+ stream->fwrite_buf = obuf;
+
+ int video_index = index_of_video(stream);
+
+ int curstream;
+
+ /* This next section validates the packet */
+
+ // Get pid and use it to find stream state.
+ int pid = ((pkt[1] & 0x1F) << 8) | pkt[2];
+ if ( ( curstream = index_of_pid( stream, pid ) ) < 0 )
+ {
+ return 0;
+ }
+
+ // Get error
+ int errorbit = (pkt[1] & 0x80) != 0;
+ if (errorbit)
+ {
+ ts_err( stream, curstream, "packet error bit set");
+ return 0;
+ }
+
+ // Get adaption header info
+ int adaption = (pkt[3] & 0x30) >> 4;
+ int adapt_len = 0;
+ if (adaption == 0)
+ {
+ ts_err( stream, curstream, "adaptation code 0");
+ return 0;
+ }
+ else if (adaption == 0x2)
+ adapt_len = 184;
+ else if (adaption == 0x3)
+ {
+ adapt_len = pkt[4] + 1;
+ if (adapt_len > 184)
+ {
+ ts_err( stream, curstream, "invalid adapt len %d", adapt_len);
+ return 0;
+ }
+ }
+
+ if ( adapt_len > 0 )
+ {
+ if ( pkt[5] & 0x40 )
+ {
+ // found a random access point
+ }
+ // if there's an adaptation header & PCR_flag is set
+ // get the PCR (Program Clock Reference)
+ if ( adapt_len > 7 && ( pkt[5] & 0x10 ) != 0 )
+ {
+ stream->ts_pcr = ( (uint64_t)pkt[6] << (33 - 8) ) |
+ ( (uint64_t)pkt[7] << (33 - 16) ) |
+ ( (uint64_t)pkt[8] << (33 - 24) ) |
+ ( (uint64_t)pkt[9] << (33 - 32) ) |
+ ( pkt[10] >> 7 );
+ ++stream->ts_pcr_in;
+ stream->ts_found_pcr = 1;
+ stream->ts_flags |= TS_HAS_PCR;
+ }
+ }
+
+ // If we don't have a PCR yet but the stream has PCRs just loop
+ // so we don't process anything until we have a clock reference.
+ // Unfortunately the HD Home Run appears to null out the PCR so if
+ // we didn't detect a PCR during scan keep going and we'll use
+ // the video stream DTS for the PCR.
+
+ if ( !stream->ts_found_pcr && ( stream->ts_flags & TS_HAS_PCR ) )
+ {
+ return 0;
+ }
+
+ // Get continuity
+ // Continuity only increments for adaption values of 0x3 or 0x01
+ // and is not checked for start packets.
+
+ int start = (pkt[1] & 0x40) != 0;
+
+ if ( (adaption & 0x01) != 0 )
+ {
+ int continuity = (pkt[3] & 0xF);
+ if ( continuity == stream->ts_streamcont[curstream] )
+ {
+ // Spliced transport streams can have duplicate
+ // continuity counts at the splice boundary.
+ // Test to see if the packet is really a duplicate
+ // by comparing packet summaries to see if they
+ // match.
+ uint8_t summary[8];
+
+ summary[0] = adaption;
+ summary[1] = adapt_len;
+ if (adapt_len + 4 + 6 + 9 <= 188)
{
- hb_log("hb_ts_stream_decode: ts_packetbuf overflow, pos = %d ,"
- "len = %d", stream->ts_packetpos[curstream],
- 184 - adapt_len );
- return;
+ memcpy(&summary[2], pkt+4+adapt_len+9, 6);
}
- memcpy(stream->ts_packetbuf[curstream] + stream->ts_packetpos[curstream], buf + 4 + adapt_len, 184 - adapt_len);
- stream->ts_packetpos[curstream] += 184 - adapt_len;
- }
- }
-}
+ else
+ {
+ memset(&summary[2], 0, 6);
+ }
+ if ( memcmp( summary, stream->ts_pkt_summary[curstream], 8 ) == 0 )
+ {
+ // we got a duplicate packet (usually used to introduce
+ // a PCR when one is needed). The only thing that can
+ // change in the dup is the PCR which we grabbed above
+ // so ignore the rest.
+ return 0;
+ }
+ }
+ if ( !start && (stream->ts_streamcont[curstream] != -1) &&
+ !stream->ts_skipbad[curstream] &&
+ (continuity != ( (stream->ts_streamcont[curstream] + 1) & 0xf ) ) )
+ {
+ ts_err( stream, curstream, "continuity error: got %d expected %d",
+ (int)continuity,
+ (stream->ts_streamcont[curstream] + 1) & 0xf );
+ stream->ts_streamcont[curstream] = continuity;
+ return 0;
+ }
+ stream->ts_streamcont[curstream] = continuity;
+
+ // Save a summary of this packet for later duplicate
+ // testing. The summary includes some header information
+ // and payload bytes. Should be enough to detect
+ // non-duplicates.
+ stream->ts_pkt_summary[curstream][0] = adaption;
+ stream->ts_pkt_summary[curstream][1] = adapt_len;
+ if (adapt_len + 4 + 6 + 9 <= 188)
+ {
+ memcpy(&stream->ts_pkt_summary[curstream][2],
+ pkt+4+adapt_len+9, 6);
+ }
+ else
+ {
+ memset(&stream->ts_pkt_summary[curstream][2], 0, 6);
+ }
+ }
-/***********************************************************************
- * hb_ts_stream_reset
- ***********************************************************************
- *
- **********************************************************************/
-static void hb_ts_stream_reset(hb_stream_t *stream)
-{
- int i=0;
- for (i=0; i < kNumDecodeBuffers; i++)
- {
- stream->ps_decode_buffer[i].read_pos = 0;
- stream->ps_decode_buffer[i].write_pos = 0;
- stream->ps_decode_buffer[i].len = 0;
- }
+ /* If we get here the packet is valid - process its data */
- for (i=0; i < kMaxNumberDecodeStreams; i++)
- {
- stream->ts_streamcont[i] = -1;
- }
+ if ( start )
+ {
+ // Found a random access point (now we can start a frame/audio packet..)
- stream->ps_current_write_buffer_index = 0;
- stream->ps_current_read_buffer_index = 1;
+ if ( stream->need_keyframe )
+ {
+ // we're looking for the first video frame because we're
+ // doing random access during 'scan'
+ if ( curstream != video_index || !isIframe( stream, pkt, adapt_len ) )
+ {
+ // not the video stream or didn't find an I frame
+ // but we'll only wait 255 video frames for an I frame.
+ if ( curstream != video_index || ++stream->need_keyframe )
+ {
+ return 0;
+ }
+ }
+ stream->need_keyframe = 0;
+ }
- align_to_next_packet(stream->file_handle);
-}
+ // If we were skipping a bad packet, start fresh on this new PES packet..
+ if (stream->ts_skipbad[curstream] == 1)
+ {
+ stream->ts_skipbad[curstream] = 0;
+ }
+
+ if ( curstream == video_index )
+ {
+ ++stream->frames;
+
+ // if we don't have a pcr yet use the dts from this frame
+ if ( !stream->ts_found_pcr )
+ {
+ // PES must begin with an mpeg start code & contain
+ // a DTS or PTS.
+ const uint8_t *pes = pkt + adapt_len + 4;
+ if ( pes[0] != 0x00 || pes[1] != 0x00 || pes[2] != 0x01 ||
+ ( pes[7] >> 6 ) == 0 )
+ {
+ return 0;
+ }
+ // if we have a dts use it otherwise use the pts
+ stream->ts_pcr = pes_timestamp( pes + ( pes[7] & 0x40?14:9 ) );
+ ++stream->ts_pcr_in;
+ }
+ }
+
+ // if this is a multiplexed stream make sure this is the
+ // substream we want.
+ if ( stream->ts_multiplexed[curstream] )
+ {
+ // PES must begin with an mpeg start code & contain
+ // a DTS or PTS.
+ const uint8_t *pes = pkt + adapt_len + 4;
+ if ( pes[0] != 0x00 || pes[1] != 0x00 || pes[2] != 0x01 ||
+ pes[3] != 0xfd )
+ {
+ stream->ts_skipbad[curstream] = 1;
+ return 0;
+ }
+ // the last byte of the header is the extension id. see if
+ // it's the one we want.
+ if ( pes[pes[8]+8] != stream->ts_multiplexed[curstream] )
+ {
+ stream->ts_skipbad[curstream] = 1;
+ return 0;
+ }
+ }
+
+ // If we have some data already on this stream, turn it into
+ // a program stream packet. Then add the payload for this
+ // packet to the current pid's buffer.
+ if ( stream->ts_pos[curstream] )
+ {
+ // we have to ship the old packet before updating the pcr
+ // since the packet we've been accumulating is referenced
+ // to the old pcr.
+ generate_output_data(stream, curstream);
+
+ // remember the pcr that was in effect when we started
+ // this packet.
+ stream->ts_buf[curstream]->cur = stream->ts_pcr_in;
+ hb_ts_stream_append_pkt(stream, curstream, pkt + 4 + adapt_len,
+ 184 - adapt_len);
+ return 1;
+ }
+ // remember the pcr that was in effect when we started this packet.
+ stream->ts_buf[curstream]->cur = stream->ts_pcr_in;
+ }
+
+ // Add the payload for this packet to the current buffer
+ if (!stream->ts_skipbad[curstream] && (184 - adapt_len) > 0)
+ {
+ hb_ts_stream_append_pkt(stream, curstream, pkt + 4 + adapt_len,
+ 184 - adapt_len);
+ // see if we've hit the end of this PES packet
+ const uint8_t *pes = stream->ts_buf[curstream]->data;
+ int len = ( pes[4] << 8 ) + pes[5] + 6;
+ if ( len > 6 && stream->ts_pos[curstream] == len &&
+ pes[0] == 0x00 && pes[1] == 0x00 && pes[2] == 0x01 )
+ {
+ generate_output_data(stream, curstream);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int hb_ts_stream_decode( hb_stream_t *stream, hb_buffer_t *obuf )
+{
+ // spin until we get a packet of data from some stream or hit eof
+ while ( 1 )
+ {
+ const uint8_t *buf = next_packet(stream);
+ if ( buf == NULL )
+ {
+ // end of file - we didn't finish filling our ps write buffer
+ // so just discard the remainder (the partial buffer is useless)
+ hb_log("hb_ts_stream_decode - eof");
+ return 0;
+ }
+
+ if (hb_ts_decode_pkt( stream, buf, obuf ))
+ {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static void hb_ts_stream_reset(hb_stream_t *stream)
+{
+ int i;
+
+ for (i=0; i < kMaxNumberDecodeStreams; i++)
+ {
+ stream->ts_pos[i] = 0;
+ stream->ts_skipbad[i] = 1;
+ stream->ts_streamcont[i] = -1;
+ }
+
+ stream->need_keyframe = 0;
+
+ stream->ts_found_pcr = 0;
+ stream->ts_pcr_out = 0;
+ stream->ts_pcr_in = 0;
+ stream->ts_pcr = 0;
+
+ stream->frames = 0;
+ stream->errors = 0;
+ stream->last_error_frame = -10000;
+ stream->last_error_count = 0;
+
+ align_to_next_packet(stream);
+}
+
+// ------------------------------------------------------------------
+// Support for reading media files via the ffmpeg libraries.
+
+static void ffmpeg_add_codec( hb_stream_t *stream, int stream_index )
+{
+ // add a codec to the context here so it will be there when we
+ // read the first packet.
+ AVCodecContext *context = stream->ffmpeg_ic->streams[stream_index]->codec;
+ context->workaround_bugs = FF_BUG_AUTODETECT;
+ context->error_recognition = 1;
+ context->error_concealment = FF_EC_GUESS_MVS|FF_EC_DEBLOCK;
+ AVCodec *codec = avcodec_find_decoder( context->codec_id );
+ hb_avcodec_open( context, codec );
+}
+
+// The ffmpeg stream reader / parser shares a lot of state with the
+// decoder via a codec context kept in the AVStream of the reader's
+// AVFormatContext. Since decoding is done in a different thread we
+// have to somehow pass this codec context to the decoder and we have
+// to do it before the first packet is read (so we can't put the info
+// in the buf we'll send downstream). Decoders don't have any way to
+// get to the stream directly (they're not passed the title or job
+// pointers during a scan) so this is a back door for the decoder to
+// get the codec context. We just stick the stream pointer in the next
+// slot an array of pointers maintained as a circular list then return
+// the index into the list combined with the ffmpeg stream index as the
+// codec_param that will be passed to the decoder init routine. We make
+// the list 'big' (enough for 1024 simultaneously open ffmpeg streams)
+// so that we don't have to do a complicated allocator or worry about
+// deleting entries on close.
+//
+// Entries can only be added to this list during a scan and are never
+// deleted so the list access doesn't require locking.
+static hb_stream_t **ffmpeg_streams; // circular list of stream pointers
+static int ffmpeg_stream_cur; // where we put the last stream pointer
+#define ffmpeg_sl_bits (10) // log2 stream list size (in entries)
+#define ffmpeg_sl_size (1 << ffmpeg_sl_bits)
+
+// add a stream to the list & return the appropriate codec_param to access it
+static int ffmpeg_codec_param( hb_stream_t *stream, int stream_index )
+{
+ if ( !ffmpeg_streams )
+ {
+ ffmpeg_streams = calloc( ffmpeg_sl_size, sizeof(stream) );
+ }
+
+ // the title scan adds all the ffmpeg media streams at once so we
+ // only add a new entry to our stream list if the stream is different
+ // than last time.
+ int slot = ffmpeg_stream_cur;
+ if ( ffmpeg_streams[slot] != stream )
+ {
+ // new stream - put it in the next slot of the stream list
+ slot = ++ffmpeg_stream_cur & (ffmpeg_sl_size - 1);
+ ffmpeg_streams[slot] = stream;
+ }
+
+ ffmpeg_add_codec( stream, stream_index );
+
+ return ( stream_index << ffmpeg_sl_bits ) | slot;
+}
+
+// we're about to open 'title' to convert it - remap the stream associated
+// with the video & audio codec params of the title to refer to 'stream'
+// (the original scan stream was closed and no longer exists).
+static void ffmpeg_remap_stream( hb_stream_t *stream, hb_title_t *title )
+{
+ // all the video & audio came from the same stream so remapping
+ // the video's stream slot takes care of everything.
+ int slot = title->video_codec_param & (ffmpeg_sl_size - 1);
+ ffmpeg_streams[slot] = stream;
+
+ // add codecs for all the streams used by the title
+ ffmpeg_add_codec( stream, title->video_codec_param >> ffmpeg_sl_bits );
+
+ int i;
+ hb_audio_t *audio;
+ for ( i = 0; ( audio = hb_list_item( title->list_audio, i ) ); ++i )
+ {
+ if ( audio->config.in.codec == HB_ACODEC_FFMPEG )
+ {
+ ffmpeg_add_codec( stream,
+ audio->config.in.codec_param >> ffmpeg_sl_bits );
+ }
+ }
+}
+
+void *hb_ffmpeg_context( int codec_param )
+{
+ if ( ffmpeg_streams == NULL )
+ return NULL;
+
+ int slot = codec_param & (ffmpeg_sl_size - 1);
+ int stream_index = codec_param >> ffmpeg_sl_bits;
+ return ffmpeg_streams[slot]->ffmpeg_ic->streams[stream_index]->codec;
+}
+
+void *hb_ffmpeg_avstream( int codec_param )
+{
+ if ( ffmpeg_streams == NULL )
+ return NULL;
+
+ int slot = codec_param & (ffmpeg_sl_size - 1);
+ int stream_index = codec_param >> ffmpeg_sl_bits;
+ return ffmpeg_streams[slot]->ffmpeg_ic->streams[stream_index];
+}
+
+static AVFormatContext *ffmpeg_deferred_close;
+
+static int ffmpeg_open( hb_stream_t *stream, hb_title_t *title )
+{
+ if ( ffmpeg_deferred_close )
+ {
+ av_close_input_file( ffmpeg_deferred_close );
+ ffmpeg_deferred_close = NULL;
+ }
+ AVFormatContext *ic;
+
+ av_log_set_level( AV_LOG_ERROR );
+ if ( av_open_input_file( &ic, stream->path, NULL, 0, NULL ) < 0 )
+ {
+ return 0;
+ }
+ if ( hb_av_find_stream_info( ic ) < 0 )
+ goto fail;
+
+ stream->ffmpeg_ic = ic;
+ stream->hb_stream_type = ffmpeg;
+ stream->ffmpeg_pkt = malloc(sizeof(*stream->ffmpeg_pkt));
+ av_init_packet( stream->ffmpeg_pkt );
+ stream->chapter_end = INT64_MAX;
+
+ if ( title )
+ {
+ // we're opening for read. scan passed out codec params that
+ // indexed its stream so we need to remap them so they point
+ // to this stream.
+ ffmpeg_remap_stream( stream, title );
+ av_log_set_level( AV_LOG_ERROR );
+ }
+ else
+ {
+ // we're opening for scan. let ffmpeg put some info into the
+ // log about what we've got.
+ av_log_set_level( AV_LOG_INFO );
+ av_dump_format( ic, 0, stream->path, 0 );
+ av_log_set_level( AV_LOG_ERROR );
+
+ // accept this file if it has at least one video stream we can decode
+ int i;
+ for (i = 0; i < ic->nb_streams; ++i )
+ {
+ if ( ic->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO )
+ {
+ break;
+ }
+ }
+ if ( i >= ic->nb_streams )
+ goto fail;
+ }
+ return 1;
+
+ fail:
+ av_close_input_file( ic );
+ return 0;
+}
+
+static void ffmpeg_close( hb_stream_t *d )
+{
+ // XXX since we're sharing the CodecContext with the downstream
+ // decoder proc we can't close the stream. We need to reference count
+ // this so we can close it when both are done with their instance but
+ // for now just defer the close until the next stream open or close.
+ if ( ffmpeg_deferred_close )
+ {
+ av_close_input_file( ffmpeg_deferred_close );
+ }
+ ffmpeg_deferred_close = d->ffmpeg_ic;
+ if ( d->ffmpeg_pkt != NULL )
+ {
+ free( d->ffmpeg_pkt );
+ d->ffmpeg_pkt = NULL;
+ }
+}
+static void add_ffmpeg_audio( hb_title_t *title, hb_stream_t *stream, int id )
+{
+ AVStream *st = stream->ffmpeg_ic->streams[id];
+ AVCodecContext *codec = st->codec;
+ AVMetadataTag *tag;
+ int layout;
+
+ // scan will ignore any audio without a bitrate. Since we've already
+ // typed the audio in order to determine its codec we set up the audio
+ // paramters here.
+ layout = hb_ff_layout_xlat( codec->channel_layout, codec->channels );
+ if ( !layout )
+ {
+ // Unsupported layout
+ return;
+ }
+ if ( codec->bit_rate || codec->sample_rate )
+ {
+ hb_audio_t *audio = calloc( 1, sizeof(*audio) );;
+
+ audio->id = id;
+ if ( codec->codec_id == CODEC_ID_AC3 )
+ {
+ audio->config.in.codec = HB_ACODEC_AC3;
+ }
+ else if ( codec->codec_id == CODEC_ID_DTS &&
+ ( codec->profile == FF_PROFILE_DTS ||
+ codec->profile == FF_PROFILE_DTS_ES ||
+ codec->profile == FF_PROFILE_DTS_96_24 ) )
+ {
+ audio->config.in.codec = HB_ACODEC_DCA;
+ }
+ else
+ {
+ audio->config.in.codec = HB_ACODEC_FFMPEG;
+ audio->config.in.codec_param = ffmpeg_codec_param( stream, id );
+
+ audio->config.in.bitrate = codec->bit_rate? codec->bit_rate : 1;
+ audio->config.in.samplerate = codec->sample_rate;
+ audio->config.in.channel_layout = layout;
+ }
+
+ tag = av_metadata_get( st->metadata, "language", NULL, 0 );
+ set_audio_description( audio,
+ lang_for_code2( tag ? tag->value : "und" ) );
+
+ hb_list_add( title->list_audio, audio );
+ }
+}
+
+/*
+ * Format:
+ * MkvVobSubtitlePrivateData = ( Line )*
+ * Line = FieldName ':' ' ' FieldValue '\n'
+ * FieldName = [^:]+
+ * FieldValue = [^\n]+
+ *
+ * The line of interest is:
+ * PaletteLine = "palette" ':' ' ' RRGGBB ( ',' ' ' RRGGBB )*
+ *
+ * More information on the format at:
+ * http://www.matroska.org/technical/specs/subtitles/images.html
+ */
+static int ffmpeg_parse_vobsub_extradata_mkv( AVCodecContext *codec, hb_subtitle_t *subtitle )
+{
+ // lines = (string) codec->extradata;
+ char *lines = malloc( codec->extradata_size + 1 );
+ if ( lines == NULL )
+ return 1;
+ memcpy( lines, codec->extradata, codec->extradata_size );
+ lines[codec->extradata_size] = '\0';
+
+ uint32_t rgb[16];
+ int gotPalette = 0;
+ int gotDimensions = 0;
+
+ char *curLine, *curLine_parserData;
+ for ( curLine = strtok_r( lines, "\n", &curLine_parserData );
+ curLine;
+ curLine = strtok_r( NULL, "\n", &curLine_parserData ) )
+ {
+ if (!gotPalette)
+ {
+ int numElementsRead = sscanf(curLine, "palette: "
+ "%06x, %06x, %06x, %06x, "
+ "%06x, %06x, %06x, %06x, "
+ "%06x, %06x, %06x, %06x, "
+ "%06x, %06x, %06x, %06x",
+ &rgb[0], &rgb[1], &rgb[2], &rgb[3],
+ &rgb[4], &rgb[5], &rgb[6], &rgb[7],
+ &rgb[8], &rgb[9], &rgb[10], &rgb[11],
+ &rgb[12], &rgb[13], &rgb[14], &rgb[15]);
+
+ if (numElementsRead == 16) {
+ gotPalette = 1;
+ }
+ }
+ if (!gotDimensions)
+ {
+ int numElementsRead = sscanf(curLine, "size: %dx%d",
+ &subtitle->width, &subtitle->height);
+
+ if (numElementsRead == 2) {
+ gotDimensions = 1;
+ }
+ }
+ if (gotPalette && gotDimensions)
+ break;
+ }
+
+ if (subtitle->width == 0 || subtitle->height == 0)
+ {
+ subtitle->width = 720;
+ subtitle->height = 480;
+ }
+
+ free( lines );
+
+ if ( gotPalette )
+ {
+ int i;
+ for (i=0; i<16; i++)
+ subtitle->palette[i] = hb_rgb2yuv(rgb[i]);
+ return 0;
+ }
+ else
+ {
+ return 1;
+ }
+}
+
+/*
+ * Format: 8-bit {0,Y,Cb,Cr} x 16
+ */
+static int ffmpeg_parse_vobsub_extradata_mp4( AVCodecContext *codec, hb_subtitle_t *subtitle )
+{
+ if ( codec->extradata_size != 4*16 )
+ return 1;
+
+ int i, j;
+ for ( i=0, j=0; i<16; i++, j+=4 )
+ {
+ subtitle->palette[i] =
+ codec->extradata[j+1] << 16 | // Y
+ codec->extradata[j+2] << 8 | // Cb
+ codec->extradata[j+3] << 0; // Cr
+ }
+ if (codec->width <= 0 || codec->height <= 0)
+ {
+ subtitle->width = 720;
+ subtitle->height = 480;
+ }
+ else
+ {
+ subtitle->width = codec->width;
+ subtitle->height = codec->height;
+ }
+ return 0;
+}
+
+/*
+ * Parses the 'subtitle->palette' information from the specific VOB subtitle track's private data.
+ * Returns 0 if successful or 1 if parsing failed or was incomplete.
+ */
+static int ffmpeg_parse_vobsub_extradata( AVCodecContext *codec, hb_subtitle_t *subtitle )
+{
+ // XXX: Better if we actually chose the correct parser based on the input container
+ return
+ ffmpeg_parse_vobsub_extradata_mkv( codec, subtitle ) &&
+ ffmpeg_parse_vobsub_extradata_mp4( codec, subtitle );
+}
+
+static void add_ffmpeg_subtitle( hb_title_t *title, hb_stream_t *stream, int id )
+{
+ AVStream *st = stream->ffmpeg_ic->streams[id];
+ AVCodecContext *codec = st->codec;
+
+ hb_subtitle_t *subtitle = calloc( 1, sizeof(*subtitle) );
+
+ subtitle->id = id;
+
+ switch ( codec->codec_id )
+ {
+ case CODEC_ID_DVD_SUBTITLE:
+ subtitle->format = PICTURESUB;
+ subtitle->source = VOBSUB;
+ subtitle->config.dest = RENDERSUB; // By default render (burn-in) the VOBSUB.
+ if ( ffmpeg_parse_vobsub_extradata( codec, subtitle ) )
+ hb_log( "add_ffmpeg_subtitle: malformed extradata for VOB subtitle track; "
+ "subtitle colors likely to be wrong" );
+ break;
+ case CODEC_ID_TEXT:
+ subtitle->format = TEXTSUB;
+ subtitle->source = UTF8SUB;
+ subtitle->config.dest = PASSTHRUSUB;
+ break;
+ case CODEC_ID_MOV_TEXT: // TX3G
+ subtitle->format = TEXTSUB;
+ subtitle->source = TX3GSUB;
+ subtitle->config.dest = PASSTHRUSUB;
+ break;
+ case CODEC_ID_SSA:
+ subtitle->format = TEXTSUB;
+ subtitle->source = SSASUB;
+ subtitle->config.dest = PASSTHRUSUB;
+ break;
+ default:
+ hb_log( "add_ffmpeg_subtitle: unknown subtitle stream type: 0x%x", (int) codec->codec_id );
+ free(subtitle);
+ return;
+ }
+
+ AVMetadataTag *tag;
+ iso639_lang_t *language;
+
+ tag = av_metadata_get( st->metadata, "language", NULL, 0 );
+ language = lang_for_code2( tag ? tag->value : "und" );
+ strcpy( subtitle->lang, language->eng_name );
+ strncpy( subtitle->iso639_2, language->iso639_2, 4 );
+
+ // Copy the extradata for the subtitle track
+ subtitle->extradata = malloc( codec->extradata_size );
+ memcpy( subtitle->extradata, codec->extradata, codec->extradata_size );
+ subtitle->extradata_size = codec->extradata_size;
+
+ hb_list_add(title->list_subtitle, subtitle);
+}
+
+static char *get_ffmpeg_metadata_value( AVMetadata *m, char *key )
+{
+ AVMetadataTag *tag = NULL;
+ while ( (tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX)) )
+ {
+ if ( !strcmp( key, tag->key ) )
+ {
+ return tag->value;
+ }
+ }
+ return NULL;
+}
+
+static void add_ffmpeg_attachment( hb_title_t *title, hb_stream_t *stream, int id )
+{
+ AVStream *st = stream->ffmpeg_ic->streams[id];
+ AVCodecContext *codec = st->codec;
+
+ enum attachtype type;
+ switch ( codec->codec_id )
+ {
+ case CODEC_ID_TTF:
+ type = FONT_TTF_ATTACH;
+ break;
+ default:
+ // Ignore unrecognized attachment type
+ return;
+ }
+
+ hb_attachment_t *attachment = calloc( 1, sizeof(*attachment) );
+
+ // Copy the attachment name and data
+ attachment->type = type;
+ attachment->name = strdup( get_ffmpeg_metadata_value( st->metadata, "filename" ) );
+ attachment->data = malloc( codec->extradata_size );
+ memcpy( attachment->data, codec->extradata, codec->extradata_size );
+ attachment->size = codec->extradata_size;
+
+ hb_list_add(title->list_attachment, attachment);
+}
+
+static hb_title_t *ffmpeg_title_scan( hb_stream_t *stream )
+{
+ AVFormatContext *ic = stream->ffmpeg_ic;
+
+ // 'Barebones Title'
+ hb_title_t *title = hb_title_init( stream->path, 0 );
+ title->type = HB_STREAM_TYPE;
+ title->index = 1;
+
+ // Copy part of the stream path to the title name
+ char *sep = strrchr(stream->path, '/');
+ if (sep)
+ strcpy(title->name, sep+1);
+ char *dot_term = strrchr(title->name, '.');
+ if (dot_term)
+ *dot_term = '\0';
+
+ uint64_t dur = ic->duration * 90000 / AV_TIME_BASE;
+ title->duration = dur;
+ dur /= 90000;
+ title->hours = dur / 3600;
+ title->minutes = ( dur % 3600 ) / 60;
+ title->seconds = dur % 60;
+
+ // set the title to decode the first video stream in the file
+ title->demuxer = HB_NULL_DEMUXER;
+ title->video_codec = 0;
+ int i;
+ for (i = 0; i < ic->nb_streams; ++i )
+ {
+ if ( ic->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO &&
+ avcodec_find_decoder( ic->streams[i]->codec->codec_id ) &&
+ title->video_codec == 0 )
+ {
+ AVCodecContext *context = ic->streams[i]->codec;
+ if ( context->pix_fmt != PIX_FMT_YUV420P &&
+ !sws_isSupportedInput( context->pix_fmt ) )
+ {
+ hb_log( "ffmpeg_title_scan: Unsupported color space" );
+ continue;
+ }
+ title->video_id = i;
+ stream->ffmpeg_video_id = i;
+
+ // We have to use the 'internal' avcodec decoder because
+ // it needs to share the codec context from this video
+ // stream. The parser internal to av_read_frame
+ // passes a bunch of state info to the decoder via the context.
+ title->video_codec = WORK_DECAVCODECVI;
+ title->video_codec_param = ffmpeg_codec_param( stream, i );
+ }
+ else if ( ic->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO &&
+ avcodec_find_decoder( ic->streams[i]->codec->codec_id ) )
+ {
+ add_ffmpeg_audio( title, stream, i );
+ }
+ else if ( ic->streams[i]->codec->codec_type == CODEC_TYPE_SUBTITLE )
+ {
+ add_ffmpeg_subtitle( title, stream, i );
+ }
+ else if ( ic->streams[i]->codec->codec_type == CODEC_TYPE_ATTACHMENT )
+ {
+ add_ffmpeg_attachment( title, stream, i );
+ }
+ }
+
+ title->container_name = strdup( ic->iformat->name );
+ title->data_rate = ic->bit_rate;
+
+ hb_deep_log( 2, "Found ffmpeg %d chapters, container=%s", ic->nb_chapters, ic->iformat->name );
+
+ if( ic->nb_chapters != 0 )
+ {
+ AVChapter *m;
+ uint64_t duration_sum = 0;
+ for( i = 0; i < ic->nb_chapters; i++ )
+ if( ( m = ic->chapters[i] ) != NULL )
+ {
+ AVMetadataTag *tag;
+ hb_chapter_t * chapter;
+ chapter = calloc( sizeof( hb_chapter_t ), 1 );
+ chapter->index = i+1;
+ chapter->duration = ( m->end / ( (double) m->time_base.num * m->time_base.den ) ) * 90000 - duration_sum;
+ duration_sum += chapter->duration;
+ chapter->hours = chapter->duration / 90000 / 3600;
+ chapter->minutes = ( ( chapter->duration / 90000 ) % 3600 ) / 60;
+ chapter->seconds = ( chapter->duration / 90000 ) % 60;
+ tag = av_metadata_get( m->metadata, "title", NULL, 0 );
+ strcpy( chapter->title, tag ? tag->value : "" );
+ hb_deep_log( 2, "Added chapter %i, name='%s', dur=%"PRIu64", (%02i:%02i:%02i)",
+ chapter->index, chapter->title,
+ chapter->duration, chapter->hours,
+ chapter->minutes, chapter->seconds );
+ hb_list_add( title->list_chapter, chapter );
+ }
+ }
+
+ /*
+ * Fill the metadata.
+ */
+ decmetadata( title );
+
+ if( hb_list_count( title->list_chapter ) == 0 )
+ {
+ // Need at least one chapter
+ hb_chapter_t * chapter;
+ chapter = calloc( sizeof( hb_chapter_t ), 1 );
+ chapter->index = 1;
+ chapter->duration = title->duration;
+ chapter->hours = title->hours;
+ chapter->minutes = title->minutes;
+ chapter->seconds = title->seconds;
+ hb_list_add( title->list_chapter, chapter );
+ }
+
+ return title;
+}
+
+static int64_t av_to_hb_pts( int64_t pts, double conv_factor )
+{
+ if ( pts == AV_NOPTS_VALUE )
+ return -1;
+ return (int64_t)( (double)pts * conv_factor );
+}
+
+static int ffmpeg_is_keyframe( hb_stream_t *stream )
+{
+ uint8_t *pkt;
+
+ switch ( stream->ffmpeg_ic->streams[stream->ffmpeg_video_id]->codec->codec_id )
+ {
+ case CODEC_ID_VC1:
+ // XXX the VC1 codec doesn't mark key frames so to get previews
+ // we do it ourselves here. The decoder gets messed up if it
+ // doesn't get a SEQ header first so we consider that to be a key frame.
+ pkt = stream->ffmpeg_pkt->data;
+ if ( !pkt[0] && !pkt[1] && pkt[2] == 1 && pkt[3] == 0x0f )
+ return 1;
+
+ return 0;
+
+ case CODEC_ID_WMV3:
+ // XXX the ffmpeg WMV3 codec doesn't mark key frames.
+ // Only M$ could make I-frame detection this complicated: there
+ // are two to four bits of unused junk ahead of the frame type
+ // so we have to look at the sequence header to find out how much
+ // to skip. Then there are three different ways of coding the type
+ // depending on whether it's main or advanced profile then whether
+ // there are bframes or not so we have to look at the sequence
+ // header to get that.
+ pkt = stream->ffmpeg_pkt->data;
+ uint8_t *seqhdr = stream->ffmpeg_ic->streams[stream->ffmpeg_video_id]->codec->extradata;
+ int pshift = 2;
+ if ( ( seqhdr[3] & 0x02 ) == 0 )
+ // no FINTERPFLAG
+ ++pshift;
+ if ( ( seqhdr[3] & 0x80 ) == 0 )
+ // no RANGEREDUCTION
+ ++pshift;
+ if ( seqhdr[3] & 0x70 )
+ // stream has b-frames
+ return ( ( pkt[0] >> pshift ) & 0x3 ) == 0x01;
+
+ return ( ( pkt[0] >> pshift ) & 0x2 ) == 0;
+
+ default:
+ break;
+ }
+ return ( stream->ffmpeg_pkt->flags & PKT_FLAG_KEY );
+}
+
+static int ffmpeg_read( hb_stream_t *stream, hb_buffer_t *buf )
+{
+ int err;
+ again:
+ if ( ( err = av_read_frame( stream->ffmpeg_ic, stream->ffmpeg_pkt )) < 0 )
+ {
+ // av_read_frame can return EAGAIN. In this case, it expects
+ // to be called again to get more data.
+ if ( err == AVERROR(EAGAIN) )
+ {
+ goto again;
+ }
+ // XXX the following conditional is to handle avi files that
+ // use M$ 'packed b-frames' and occasionally have negative
+ // sizes for the null frames these require.
+ if ( err != AVERROR_NOMEM || stream->ffmpeg_pkt->size >= 0 )
+ // eof
+ return 0;
+ }
+ if ( stream->ffmpeg_pkt->size <= 0 )
+ {
+ // M$ "invalid and inefficient" packed b-frames require 'null frames'
+ // following them to preserve the timing (since the packing puts two
+ // or more frames in what looks like one avi frame). The contents and
+ // size of these null frames are ignored by the ff_h263_decode_frame
+ // as long as they're < 20 bytes. We need a positive size so we use
+ // one byte if we're given a zero or negative size. We don't know
+ // if the pkt data points anywhere reasonable so we just stick a
+ // byte of zero in our outbound buf.
+ buf->size = 1;
+ *buf->data = 0;
+ }
+ else
+ {
+ if ( stream->ffmpeg_pkt->size > buf->alloc )
+ {
+ // sometimes we get absurd sizes from ffmpeg
+ if ( stream->ffmpeg_pkt->size >= (1 << 25) )
+ {
+ hb_log( "ffmpeg_read: pkt too big: %d bytes", stream->ffmpeg_pkt->size );
+ av_free_packet( stream->ffmpeg_pkt );
+ return ffmpeg_read( stream, buf );
+ }
+ // need to expand buffer
+ hb_buffer_realloc( buf, stream->ffmpeg_pkt->size );
+ }
+ memcpy( buf->data, stream->ffmpeg_pkt->data, stream->ffmpeg_pkt->size );
+ buf->size = stream->ffmpeg_pkt->size;
+ }
+ buf->id = stream->ffmpeg_pkt->stream_index;
+ if ( buf->id == stream->ffmpeg_video_id )
+ {
+ if ( stream->need_keyframe )
+ {
+ // we've just done a seek (generally for scan or live preview) and
+ // want to start at a keyframe. Some ffmpeg codecs seek to a key
+ // frame but most don't. So we spin until we either get a keyframe
+ // or we've looked through 50 video frames without finding one.
+ if ( ! ffmpeg_is_keyframe( stream ) && ++stream->need_keyframe < 50 )
+ {
+ av_free_packet( stream->ffmpeg_pkt );
+ goto again;
+ }
+ stream->need_keyframe = 0;
+ }
+ ++stream->frames;
+ }
+
+ // if we haven't done it already, compute a conversion factor to go
+ // from the ffmpeg timebase for the stream to HB's 90KHz timebase.
+ double tsconv = stream->ffmpeg_tsconv[stream->ffmpeg_pkt->stream_index];
+ if ( ! tsconv )
+ {
+ AVStream *s = stream->ffmpeg_ic->streams[stream->ffmpeg_pkt->stream_index];
+ tsconv = 90000. * (double)s->time_base.num / (double)s->time_base.den;
+ stream->ffmpeg_tsconv[stream->ffmpeg_pkt->stream_index] = tsconv;
+ }
+
+ buf->start = av_to_hb_pts( stream->ffmpeg_pkt->pts, tsconv );
+ buf->renderOffset = av_to_hb_pts( stream->ffmpeg_pkt->dts, tsconv );
+ if ( buf->renderOffset >= 0 && buf->start == -1 )
+ {
+ buf->start = buf->renderOffset;
+ }
+ else if ( buf->renderOffset == -1 && buf->start >= 0 )
+ {
+ buf->renderOffset = buf->start;
+ }
+
+ /*
+ * Fill out buf->stop for subtitle packets
+ *
+ * libavcodec's MKV demuxer stores the duration of UTF-8 subtitles (CODEC_ID_TEXT)
+ * in the 'convergence_duration' field for some reason.
+ *
+ * Other subtitles' durations are stored in the 'duration' field.
+ *
+ * VOB subtitles (CODEC_ID_DVD_SUBTITLE) do not have their duration stored in
+ * either field. This is not a problem because the VOB decoder can extract this
+ * information from the packet payload itself.
+ *
+ * SSA subtitles (CODEC_ID_SSA) do not have their duration stored in
+ * either field. This is not a problem because the SSA decoder can extract this
+ * information from the packet payload itself.
+ */
+ enum CodecID ffmpeg_pkt_codec = stream->ffmpeg_ic->streams[stream->ffmpeg_pkt->stream_index]->codec->codec_id;
+ if ( ffmpeg_pkt_codec == CODEC_ID_TEXT ) {
+ int64_t ffmpeg_pkt_duration = stream->ffmpeg_pkt->convergence_duration;
+ int64_t buf_duration = av_to_hb_pts( ffmpeg_pkt_duration, tsconv );
+ buf->stop = buf->start + buf_duration;
+ }
+ if ( ffmpeg_pkt_codec == CODEC_ID_MOV_TEXT ) {
+ int64_t ffmpeg_pkt_duration = stream->ffmpeg_pkt->duration;
+ int64_t buf_duration = av_to_hb_pts( ffmpeg_pkt_duration, tsconv );
+ buf->stop = buf->start + buf_duration;
+ }
+
+ /*
+ * Check to see whether this video buffer is on a chapter
+ * boundary, if so mark it as such in the buffer then advance
+ * chapter_end to the end of the next chapter.
+ * If there are no chapters, chapter_end is always initialized to INT64_MAX
+ * (roughly 3 million years at our 90KHz clock rate) so the test
+ * below handles both the chapters & no chapters case.
+ */
+ if ( buf->id == stream->ffmpeg_video_id && buf->start >= stream->chapter_end )
+ {
+ hb_chapter_t *chapter = hb_list_item( stream->title->list_chapter,
+ stream->chapter+1 );
+ if( chapter )
+ {
+ stream->chapter++;
+ stream->chapter_end += chapter->duration;
+ buf->new_chap = stream->chapter + 1;
+ hb_deep_log( 2, "ffmpeg_read starting chapter %i at %"PRId64,
+ buf->new_chap, buf->start);
+ } else {
+ // Must have run out of chapters, stop looking.
+ stream->chapter_end = INT64_MAX;
+ }
+ } else {
+ buf->new_chap = 0;
+ }
+ av_free_packet( stream->ffmpeg_pkt );
+ return 1;
+}
+
+static int ffmpeg_seek( hb_stream_t *stream, float frac )
+{
+ AVFormatContext *ic = stream->ffmpeg_ic;
+ if ( frac > 0. )
+ {
+ int64_t pos = (double)ic->duration * (double)frac;
+ if ( ic->start_time != AV_NOPTS_VALUE && ic->start_time > 0 )
+ {
+ pos += ic->start_time;
+ }
+ av_seek_frame( ic, -1, pos, 0 );
+ stream->need_keyframe = 1;
+ }
+ else
+ {
+ av_seek_frame( ic, -1, 0LL, AVSEEK_FLAG_BACKWARD );
+ }
+ return 1;
+}
+
+// Assumes that we are always seeking forward
+static int ffmpeg_seek_ts( hb_stream_t *stream, int64_t ts )
+{
+ AVFormatContext *ic = stream->ffmpeg_ic;
+ int64_t pos;
+
+ pos = ts * AV_TIME_BASE / 90000 + ffmpeg_initial_timestamp( stream );
+ stream->need_keyframe = 1;
+ // Seek to the nearest timestamp before that requested where
+ // there is an I-frame
+ return av_seek_frame( ic, -1, pos, AVSEEK_FLAG_BACKWARD );
+}
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