#include <errno.h>
#include "hb.h"
+#include "hbffmpeg.h"
#include "lang.h"
#include "a52dec/a52.h"
-#include "libavcodec/avcodec.h"
-#include "libavformat/avformat.h"
#include "mp4v2/mp4v2.h"
#define min(a, b) a < b ? a : b
* doesn't handle the stream type.
*/
typedef struct {
- enum { U = 1, A, V } kind; /* unknown / audio / video */
+ enum { N, U, A, V } 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 */
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, U, 0, 0, "ISO 13818-1 private section"),
+ st(0x05, N, 0, 0, "ISO 13818-1 private section"),
st(0x06, U, 0, 0, "ISO 13818-1 PES private data"),
- st(0x07, U, 0, 0, "ISO 13522 MHEG"),
- st(0x08, U, 0, 0, "ISO 13818-1 DSM-CC"),
- st(0x09, U, 0, 0, "ISO 13818-1 auxiliary"),
- st(0x0a, U, 0, 0, "ISO 13818-6 encap"),
- st(0x0b, U, 0, 0, "ISO 13818-6 DSM-CC U-N msgs"),
- st(0x0c, U, 0, 0, "ISO 13818-6 Stream descriptors"),
- st(0x0d, U, 0, 0, "ISO 13818-6 Sections"),
- st(0x0e, U, 0, 0, "ISO 13818-1 auxiliary"),
+ 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, U, 0, 0, "ISO 13818-6 DSM-CC download"),
+ st(0x14, N, 0, 0, "ISO 13818-6 DSM-CC download"),
st(0x1b, V, WORK_DECAVCODECV, CODEC_ID_H264, "H.264"),
- //st(0x80, U, 0, 0, "DigiCipher II Video"),
+ st(0x80, N, 0, 0, "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"),
st(0x8a, A, HB_ACODEC_DCA, 0, "DTS"),
st(0x91, A, HB_ACODEC_AC3, 0, "AC-3"),
- st(0x92, U, 0, 0, "Subtitle"),
+ st(0x92, N, 0, 0, "Subtitle"),
st(0x94, A, 0, 0, "SDDS"),
st(0xa0, V, 0, 0, "MSCODEC"),
} hb_stream_type_t;
#define kMaxNumberVideoPIDS 1
-#define kMaxNumberAudioPIDS 15
+#define kMaxNumberAudioPIDS 31
#define kMaxNumberDecodeStreams (kMaxNumberVideoPIDS+kMaxNumberAudioPIDS)
#define kMaxNumberPMTStreams 32
int last_error_count; /* # errors at last error message */
int packetsize; /* Transport Stream packet size */
- int8_t need_keyframe; // non-zero if want to start at a keyframe
- int8_t ts_no_RAP; // non-zero if there are no random access points
-
- int8_t ts_found_pcr; // non-zero if we've found at least one input pcr
+ 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
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 */
- uint64_t chapter_end; /* HB time that the current chapter ends */
+ int64_t chapter_end; /* HB time that the current chapter ends */
/*
* Stuff before this point is dynamic state updated as we read the
*/
uint8_t ts_number_video_pids;
uint8_t ts_number_audio_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_video_pids[kMaxNumberVideoPIDS];
int16_t ts_audio_pids[kMaxNumberAudioPIDS];
}
}
+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_list args;
va_start( args, log );
ts_warn_helper( stream, log, args );
va_end( args );
static void ts_err( hb_stream_t *stream, int curstream, char *log, ... )
{
- va_list args;
+ va_list args;
va_start( args, log );
ts_warn_helper( stream, log, args );
va_end( args );
(buf[2] == 0x01) && (buf[3] == 0xba);
}
-static int check_ps_sys(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
- // SYS. If we've already verified the pack, this skips over it and checks
- // for the sys header.
+ // 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) && (buf[pos+3] == 0xbb);
+ return (buf[pos+0] == 0x00) && (buf[pos+1] == 0x00) && (buf[pos+2] == 0x01);
}
static int check_ts_sync(const uint8_t *buf)
static int hb_stream_check_for_ps(const uint8_t *buf)
{
- // program streams should start with a PACK then a SYS header.
- return check_ps_sync(buf) && check_ps_sys(buf);
+ // 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).
+ return check_ps_sync(buf) && check_ps_sc(buf);
}
static int hb_stream_check_for_dvd_ps(const uint8_t *buf)
free( d );
}
+static int audio_inactive( hb_stream_t *stream, int indx )
+{
+ int aud_indx = indx - 1;
+
+ if ( stream->ts_audio_pids[aud_indx] < 0 )
+ {
+ // PID declared inactive by hb_stream_title_scan
+ return 1;
+ }
+ if ( stream->ts_audio_pids[aud_indx] == 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 == indx )
+ {
+ return 0;
+ }
+ }
+ // not in the title's audio list - declare the PID inactive
+ stream->ts_audio_pids[aud_indx] = -stream->ts_audio_pids[aud_indx];
+ return 1;
+}
+
/***********************************************************************
* hb_stream_open
***********************************************************************
**********************************************************************/
hb_stream_t * hb_stream_open( char *path, hb_title_t *title )
{
- FILE *f = fopen( path, "r" );
+ FILE *f = fopen( path, "rb" );
if ( f == NULL )
{
hb_log( "hb_stream_open: open %s failed", path );
int i = 0;
for ( ; i < d->ts_number_video_pids + d->ts_number_audio_pids; i++)
{
+ if ( i && 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. );
-
- if ( d->packetsize == 188 )
- {
- // Assume that an over-the-air transport stream can lose PCR
- // packets and try to filter out the timing inconsistencies.
- title->flaky_clock = 1;
- }
}
return d;
}
* of the media stream for HB. */
static void hb_stream_delete_audio_entry(hb_stream_t *stream, int indx)
{
- stream->ts_audio_pids[indx] = -stream->ts_audio_pids[indx];
+ if ( stream->ts_audio_pids[indx] > 0 )
+ {
+ stream->ts_audio_pids[indx] = -stream->ts_audio_pids[indx];
+ }
}
static int index_of_pid(int pid, hb_stream_t *stream)
aTitle->video_codec = st2codec[stream->ts_stream_type[0]].codec;
aTitle->video_codec_param = st2codec[stream->ts_stream_type[0]].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
{
off_t pos2 = align_to_next_packet(stream);
if ( pos2 == 0 )
{
- hb_log( "next_packet: eof while re-establishing sync @ %lld", pos );
+ hb_log( "next_packet: eof while re-establishing sync @ %"PRId64, pos );
return NULL;
}
- ts_warn( stream, "next_packet: sync lost @ %lld, regained after %lld bytes",
+ ts_warn( stream, "next_packet: sync lost @ %"PRId64", regained after %"PRId64" bytes",
pos, pos2 );
}
}
}
}
-/*
- * scan the next MB of 'stream' to try to find a random access point
- */
-static void hb_ts_stream_find_RAP( hb_stream_t *stream )
+static int isIframe( hb_stream_t *stream, const uint8_t *buf, int adapt_len )
{
- off_t starting_point = ftello(stream->file_handle);
- int npack = 300000; // max packets to read
+ // 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;
- while (--npack >= 0)
+
+ if ( stream->ts_stream_type[0] <= 2 )
{
- off_t cur = ftello(stream->file_handle);
- const uint8_t *buf = next_packet( stream );
- if ( buf == NULL )
- {
- break;
- }
- switch (buf[3] & 0x30)
+ // This section of the code handles MPEG-1 and MPEG-2 video streams
+ for (i = 13 + adapt_len; i < 188; i++)
{
- case 0x00: // illegal
- continue;
-
- case 0x20: // fill packet
- case 0x30: // adaptation
- if ( buf[5] & 0x40 )
+ strid = (strid << 8) | buf[i];
+ if ( ( strid >> 8 ) == 1 )
+ {
+ // we found a start code
+ uint8_t id = strid;
+ switch ( id )
{
- // found a random access point
- fseeko( stream->file_handle, cur, SEEK_SET );
- return;
+ 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;
}
- continue;
+ }
+ }
+ // 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;
}
- /* didn't find it */
- fseeko( stream->file_handle, starting_point, SEEK_SET );
- stream->ts_no_RAP = 1;
+ // we don't understand the stream type so just say "yes" otherwise
+ // we'll discard all the video.
+ return 1;
}
/*
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 || (buf[1] & 0x1f) != (pid >> 8) ||
- buf[2] != (pid & 0xff))
+ if ((buf[1] & 0x40) == 0 || pack_pid != pid )
{
// not a start packet or not the pid we want
continue;
uint64_t pts; /* PTS from video stream */
};
-#define NDURSAMPLES 16
+#define NDURSAMPLES 128
// get one (position, timestamp) sampple from a transport or program
// stream.
buf = hb_ts_stream_getPEStype( stream, stream->ts_video_pids[0] );
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
{
static double compute_stream_rate( struct pts_pos *pp, int n )
{
int i, j;
- double rates[NDURSAMPLES * NDURSAMPLES / 2];
+ double rates[NDURSAMPLES * NDURSAMPLES / 8];
double *rp = rates;
// the following nested loops compute the rates between all pairs.
// 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 >> 1 );
+ 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 )) /
return hb_ts_stream_decode( src_stream, b );
}
-/***********************************************************************
- * hb_stream_seek_chapter
- ***********************************************************************
- *
- **********************************************************************/
int hb_stream_seek_chapter( hb_stream_t * stream, int chapter_num )
{
- AVFormatContext *ic = stream->ffmpeg_ic;
- uint64_t end_offset = 0;
- uint64_t start_offset = 0;
- uint64_t pos = 0;
- hb_chapter_t *chapter = NULL;
- int i;
- if( !stream || !stream->title )
- {
- return 0;
- }
if ( stream->hb_stream_type != ffmpeg )
{
// currently meaningliess for transport and program streams
return 1;
}
-
- for( i = 0; i < chapter_num; i++)
+ if ( !stream || !stream->title ||
+ chapter_num > hb_list_count( stream->title->list_chapter ) )
{
- chapter = hb_list_item( stream->title->list_chapter,
- i );
-
- if( chapter )
- {
- /*
- * Seeking to a chapter means that we are in that chapter,
- * so track which chapter we are in so that we can output
- * the correct chapter numbers in buf->new_chap
- */
- start_offset = end_offset;
- end_offset += chapter->duration;
- stream->chapter = i;
- stream->chapter_end = end_offset;
- } else {
- return 0;
- }
+ return 0;
}
- /*
- * Is the the correct way to convert timebases? It seems to get it pretty
- * much right - plus a few seconds, which is odd.
- */
- pos = ((start_offset * AV_TIME_BASE) / 90000);
+ 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;
- hb_deep_log( 2, "Seeking to chapter %d time (starts: %lld ends %lld) AV pos %lld", chapter_num-1, start_offset, end_offset, pos);
+ int64_t pos = ( ( ( sum_dur - chapter->duration ) * AV_TIME_BASE ) / 90000 );
- av_seek_frame( ic, -1, pos, 0);
+ 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);
+ }
return 1;
}
hb_ts_stream_reset(stream);
if ( f > 0 )
{
- if ( !stream->ts_no_RAP )
+ if ( stream->ts_IDRs )
{
- // we're not at the beginning - try to find a random access point
- hb_ts_stream_find_RAP( stream );
+ // the stream has IDRs so look for one.
+ stream->need_keyframe = 1;
}
- stream->need_keyframe = 1;
}
else
{
audio->config.in.codec_param = st2codec[stype].codec_param;
set_audio_description( audio,
lang_for_code( stream->a52_info[aud_pid_index].lang_code ) );
- hb_log("transport stream pid 0x%x (type 0x%x) is %s audio id 0x%x",
+ hb_log("transport stream pid 0x%x (type 0x%x) may be %s audio (id 0x%x)",
stream->ts_audio_pids[aud_pid_index],
stype, st2codec[stype].name, audio->id);
}
switch (dp[0])
{
case 5: // Registration descriptor
- stream->ts_format_id[esindx] = (dp[2] << 24) | (dp[3] << 16) |
+ stream->ts_format_id[esindx+1] = (dp[2] << 24) | (dp[3] << 16) |
(dp[4] << 8) | dp[5];
break;
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+1] = 0x81;
+ break;
+
default:
break;
}
if ( index_of_pid( elementary_PID, stream ) < 0 )
{
- // already have this pid - do nothing
- }
- if (stream->ts_number_video_pids == 0 && st2codec[stream_type].kind == V )
- {
- stream->ts_video_pids[0] = elementary_PID;
- stream->ts_stream_type[0] = stream_type;
- stream->ts_number_video_pids = 1;
- }
- 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)
+ // don't have this pid yet
+ if (stream->ts_number_video_pids == 0 &&
+ st2codec[stream_type].kind == V )
+ {
+ stream->ts_video_pids[0] = elementary_PID;
+ stream->ts_stream_type[0] = stream_type;
+ stream->ts_number_video_pids = 1;
+ }
+ else
{
- stream->ts_audio_pids[i] = elementary_PID;
- stream->ts_stream_type[1 + i] = stream_type;
- if (ES_info_length > 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_audio_pids;
+ if (i < kMaxNumberAudioPIDS)
{
- decode_element_descriptors(stream, i, ES_info_buf,
- ES_info_length);
+ stream->ts_audio_pids[i] = elementary_PID;
+ stream->ts_stream_type[1 + i] = stream_type;
+ if (ES_info_length > 0)
+ {
+ decode_element_descriptors(stream, i, ES_info_buf,
+ ES_info_length);
+ }
+ ++stream->ts_number_audio_pids;
}
- ++stream->ts_number_audio_pids;
}
}
free(ES_info_buf);
if (cur_pos >= section_length - 4 /* stop before the CRC */)
- done_reading_stream_types = 1;
+ done_reading_stream_types = 1;
}
free(descriptor_buf);
static void hb_ts_stream_find_pids(hb_stream_t *stream)
{
- // align to first packet
+ // 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
static void fwrite64( hb_stream_t *stream, void *buf, int len )
{
- int pos;
-
- pos = stream->fwrite_buf->size;
- if ( pos + len > stream->fwrite_buf->alloc )
+ if ( len > 0 )
{
- int size = MAX(stream->fwrite_buf->alloc * 2, pos + len);
- hb_buffer_realloc(stream->fwrite_buf, size);
+ 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;
}
- memcpy( &(stream->fwrite_buf->data[pos]), buf, len );
- stream->fwrite_buf->size += len;
}
// convert a PES PTS or DTS to an int64
stream->ts_buf[curstream]->size = 0;
}
-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: ???
- 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;
-
- if ( stream->packetsize == 192 )
- {
- // m2ts files have idr frames so keep looking for one
- continue;
- }
-
- // h.264 in ts files (ATSC or DVB video) often seem to be
- // missing IDR frames so look for at least an I
- if ( nal_type == 0x01 )
- {
- // h.264 slice: has to be start MB 0 & type I (2, 4, 7 or 9)
- uint8_t id = buf[i+1];
- if ( ( id >> 4 ) == 0x0b || ( id >> 2 ) == 0x25 ||
- id == 0x88 || id == 0x8a )
- {
- 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;
-}
-
static void hb_ts_stream_append_pkt(hb_stream_t *stream, int idx, const uint8_t *buf, int len)
{
if (stream->ts_pos[idx] + len > stream->ts_buf[idx]->alloc)
}
}
- // If we don't have a pcr yet, the right thing to do here would
- // be a 'continue' so we don't process anything until we have a
- // clock reference. Unfortunately the HD Home Run appears to null
- // out the pcr field of some streams so we keep going & substitute
- // the video stream dts for the pcr when there's no 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 ) )
+ {
+ continue;
+ }
// Get continuity
// Continuity only increments for adaption values of 0x3 or 0x01
int continuity = (buf[3] & 0xF);
if ( continuity == stream->ts_streamcont[curstream] )
{
- // 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.
- continue;
+ // 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)
+ {
+ memcpy(&summary[2], buf+4+adapt_len+9, 6);
+ }
+ 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.
+ continue;
+ }
}
if ( !start && (stream->ts_streamcont[curstream] != -1) &&
!stream->ts_skipbad[curstream] &&
(int)continuity,
(stream->ts_streamcont[curstream] + 1) & 0xf );
stream->ts_streamcont[curstream] = continuity;
- continue;
- }
- stream->ts_streamcont[curstream] = continuity;
- }
+ continue;
+ }
+ 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],
+ buf+4+adapt_len+9, 6);
+ }
+ else
+ {
+ memset(&stream->ts_pkt_summary[curstream][2], 0, 6);
+ }
+ }
/* If we get here the packet is valid - process its data */
{
// we're looking for the first video frame because we're
// doing random access during 'scan'
- if (curstream != 0 || !isIframe( stream, buf, adapt_len ) )
+ if ( curstream != 0 || !isIframe( stream, buf, adapt_len ) )
{
// not the video stream or didn't find an I frame
- continue;
+ // but we'll only wait 255 video frames for an I frame.
+ if ( curstream != 0 || ++stream->need_keyframe )
+ {
+ continue;
+ }
}
stream->need_keyframe = 0;
}
context->error_recognition = 1;
context->error_concealment = FF_EC_GUESS_MVS|FF_EC_DEBLOCK;
AVCodec *codec = avcodec_find_decoder( context->codec_id );
- avcodec_open( context, codec );
+ hb_avcodec_open( context, codec );
}
// The ffmpeg stream reader / parser shares a lot of state with the
// (the original scan stream was closed and no longer exists).
static void ffmpeg_remap_stream( hb_stream_t *stream, hb_title_t *title )
{
- // tell ffmpeg we want a pts on every frame it returns
- stream->ffmpeg_ic->flags |= AVFMT_FLAG_GENPTS;
-
// 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);
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 )
{
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);
+ 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 )
+ {
+ 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;
+ strcpy( chapter->title, m->title );
+ 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.
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;
buf->id = stream->ffmpeg_pkt->stream_index;
if ( buf->id == stream->ffmpeg_video_id )
{
- if ( stream->need_keyframe &&
- stream->ffmpeg_ic->streams[stream->ffmpeg_video_id]->codec->codec_id ==
- CODEC_ID_VC1 )
+ if ( stream->need_keyframe )
{
- // XXX the VC1 codec doesn't seek to 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.
- uint8_t *pkt = stream->ffmpeg_pkt->data;
- if ( pkt[0] || pkt[1] || pkt[2] != 1 || pkt[3] != 0x0f )
+ // 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;
/*
* Check to see whether this video buffer is on a chapter
- * boundary, if so mark it as such in the buffer. The chapters for
- * a stream have a simple duration for each chapter. So we keep
- * track of what chapter we are in currently, and when it is due
- * to end.
+ * 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.
*/
- hb_deep_log( 3, "title=0x%x, job=0x%x, chapter_markers=%d, time=%lld, chapter=%d, end_chapter=%lld",
- stream->title,
- stream->title ? (stream->title->job ? stream->title->job : 0x0) : 0x0,
- stream->title ? (stream->title->job ? stream->title->job->chapter_markers : 2) : 0x0,
- buf->start, stream->chapter, stream->chapter_end);
-
- if( stream->title &&
- stream->title->job &&
- stream->title->job->chapter_markers &&
- buf->id == stream->ffmpeg_video_id &&
- buf->start >= stream->chapter_end )
+ if ( buf->id == stream->ffmpeg_video_id && buf->start >= stream->chapter_end )
{
- hb_chapter_t *chapter = NULL;
-
- /*
- * Store when this chapter ends using HB time.
- */
- chapter = hb_list_item( stream->title->list_chapter,
- stream->chapter );
-
+ hb_chapter_t *chapter = hb_list_item( stream->title->list_chapter,
+ stream->chapter+1 );
if( chapter )
{
- if( stream->chapter != 0 )
- {
- buf->new_chap = stream->chapter + 2;
- }
-
- hb_deep_log( 2, "Starting chapter %i at %lld", buf->new_chap, buf->start);
- stream->chapter_end += chapter->duration;
stream->chapter++;
- hb_deep_log( 2, "Looking for chapter %i at %lld", stream->chapter+1, stream->chapter_end );
+ 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 = -1;
+ // Must have run out of chapters, stop looking.
+ stream->chapter_end = INT64_MAX;
}
} else {
buf->new_chap = 0;
static int ffmpeg_seek( hb_stream_t *stream, float frac )
{
AVFormatContext *ic = stream->ffmpeg_ic;
- int64_t pos = (double)ic->duration * (double)frac;
- if ( pos )
+ 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, pos, AVSEEK_FLAG_BACKWARD );
+ av_seek_frame( ic, -1, 0LL, AVSEEK_FLAG_BACKWARD );
}
return 1;
}
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