3 This file is part of the HandBrake source code.
4 Homepage: <http://handbrake.fr/>.
5 It may be used under the terms of the GNU General Public License. */
14 #include "a52dec/a52.h"
15 #include "mp4v2/mp4v2.h"
17 #define min(a, b) a < b ? a : b
20 * This table defines how ISO MPEG stream type codes map to HandBrake
21 * codecs. It is indexed by the 8 bit stream type and contains the codec
22 * worker object id and a parameter for that worker proc (ignored except
23 * for the ffmpeg-based codecs in which case it is the ffmpeg codec id).
25 * Entries with a worker proc id of 0 or a kind of 'U' indicate that HB
26 * doesn't handle the stream type.
29 enum { N, U, A, V } kind; /* not handled / unknown / audio / video */
30 int codec; /* HB worker object id of codec */
31 int codec_param; /* param for codec (usually ffmpeg codec id) */
32 const char* name; /* description of type */
35 #define st(id, kind, codec, codec_param, name) \
36 [id] = { kind, codec, codec_param, name }
38 static const stream2codec_t st2codec[256] = {
39 st(0x01, V, WORK_DECMPEG2, 0, "MPEG1"),
40 st(0x02, V, WORK_DECMPEG2, 0, "MPEG2"),
41 st(0x03, A, HB_ACODEC_MPGA, CODEC_ID_MP2, "MPEG1"),
42 st(0x04, A, HB_ACODEC_MPGA, CODEC_ID_MP2, "MPEG2"),
43 st(0x05, N, 0, 0, "ISO 13818-1 private section"),
44 st(0x06, U, 0, 0, "ISO 13818-1 PES private data"),
45 st(0x07, N, 0, 0, "ISO 13522 MHEG"),
46 st(0x08, N, 0, 0, "ISO 13818-1 DSM-CC"),
47 st(0x09, N, 0, 0, "ISO 13818-1 auxiliary"),
48 st(0x0a, N, 0, 0, "ISO 13818-6 encap"),
49 st(0x0b, N, 0, 0, "ISO 13818-6 DSM-CC U-N msgs"),
50 st(0x0c, N, 0, 0, "ISO 13818-6 Stream descriptors"),
51 st(0x0d, N, 0, 0, "ISO 13818-6 Sections"),
52 st(0x0e, N, 0, 0, "ISO 13818-1 auxiliary"),
53 st(0x0f, A, HB_ACODEC_MPGA, CODEC_ID_AAC, "ISO 13818-7 AAC Audio"),
54 st(0x10, V, WORK_DECAVCODECV, CODEC_ID_MPEG4, "MPEG4"),
55 st(0x11, A, HB_ACODEC_MPGA, CODEC_ID_AAC_LATM, "MPEG4 LATM AAC"),
56 st(0x12, U, 0, 0, "MPEG4 generic"),
58 st(0x14, N, 0, 0, "ISO 13818-6 DSM-CC download"),
60 st(0x1b, V, WORK_DECAVCODECV, CODEC_ID_H264, "H.264"),
62 st(0x80, N, 0, 0, "DigiCipher II Video"),
63 st(0x81, A, HB_ACODEC_AC3, 0, "AC-3"),
64 st(0x82, A, HB_ACODEC_DCA, 0, "HDMV DTS"),
65 st(0x83, A, HB_ACODEC_LPCM, 0, "LPCM"),
66 st(0x84, A, 0, 0, "SDDS"),
67 st(0x85, U, 0, 0, "ATSC Program ID"),
68 st(0x86, A, HB_ACODEC_DCA, 0, "DTS-HD"),
69 st(0x87, A, 0, 0, "E-AC-3"),
71 st(0x8a, A, HB_ACODEC_DCA, 0, "DTS"),
73 st(0x91, A, HB_ACODEC_AC3, 0, "AC-3"),
74 st(0x92, N, 0, 0, "Subtitle"),
76 st(0x94, A, 0, 0, "SDDS"),
77 st(0xa0, V, 0, 0, "MSCODEC"),
79 st(0xea, V, WORK_DECAVCODECV, CODEC_ID_VC1, "VC1"),
84 hb_stream_type_unknown = 0,
91 #define kMaxNumberVideoPIDS 1
92 #define kMaxNumberAudioPIDS 31
93 #define kMaxNumberDecodeStreams (kMaxNumberVideoPIDS+kMaxNumberAudioPIDS)
94 #define kMaxNumberPMTStreams 32
99 int frames; /* video frames so far */
100 int errors; /* total errors so far */
101 int last_error_frame; /* frame # at last error message */
102 int last_error_count; /* # errors at last error message */
103 int packetsize; /* Transport Stream packet size */
105 uint8_t need_keyframe; // non-zero if want to start at a keyframe
106 uint8_t ts_found_pcr; // non-zero if we've found at least one input pcr
107 int ts_pcr_out; // sequence number of most recent output pcr
108 int ts_pcr_in; // sequence number of most recent input pcr
109 int64_t ts_pcr; // most recent input pcr
110 int64_t ts_pcrhist[4]; // circular buffer of output pcrs
112 uint8_t *ts_packet; /* buffer for one TS packet */
113 hb_buffer_t *ts_buf[kMaxNumberDecodeStreams];
114 int ts_pos[kMaxNumberDecodeStreams];
115 int8_t ts_skipbad[kMaxNumberDecodeStreams];
116 int8_t ts_streamcont[kMaxNumberDecodeStreams];
117 uint8_t ts_pkt_summary[kMaxNumberDecodeStreams][8];
119 hb_buffer_t *fwrite_buf; /* PS buffer (set by hb_ts_stream_decode) */
121 int chapter; /* Chapter that we are currently in */
122 int64_t chapter_end; /* HB time that the current chapter ends */
125 * Stuff before this point is dynamic state updated as we read the
126 * stream. Stuff after this point is stream description state that
127 * we learn during the initial scan but cache so it can be
128 * reused during the conversion read.
130 uint8_t ts_number_video_pids;
131 uint8_t ts_number_audio_pids;
132 uint8_t ts_flags; // stream characteristics:
133 #define TS_HAS_PCR (1 << 0) // at least one PCR seen
134 #define TS_HAS_RAP (1 << 1) // Random Access Point bit seen
135 #define TS_HAS_RSEI (1 << 2) // "Restart point" SEI seen
136 uint8_t ts_IDRs; // # IDRs found during duration scan
138 int16_t ts_video_pids[kMaxNumberVideoPIDS];
139 int16_t ts_audio_pids[kMaxNumberAudioPIDS];
141 uint32_t ts_format_id[kMaxNumberDecodeStreams];
142 #define TS_FORMAT_ID_AC3 (('A' << 24) | ('C' << 16) | ('-' << 8) | '3')
143 uint8_t ts_stream_type[kMaxNumberDecodeStreams];
144 uint8_t ts_multiplexed[kMaxNumberDecodeStreams];
148 hb_stream_type_t hb_stream_type;
151 AVFormatContext *ffmpeg_ic;
152 AVPacket *ffmpeg_pkt;
153 double ffmpeg_tsconv[MAX_STREAMS];
154 uint8_t ffmpeg_video_id;
161 } a52_info[kMaxNumberAudioPIDS];
165 unsigned short program_number;
166 unsigned short program_map_PID;
167 } pat_info[kMaxNumberPMTStreams];
168 int ts_number_pat_entries;
173 unsigned char *tablebuf;
174 unsigned int tablepos;
175 unsigned char current_continuity_counter;
179 unsigned int PCR_PID;
180 int program_info_length;
181 unsigned char *progam_info_descriptor_data;
184 unsigned char stream_type;
185 unsigned short elementary_PID;
186 unsigned short ES_info_length;
187 unsigned char *es_info_descriptor_data;
188 } pmt_stream_info[kMaxNumberPMTStreams];
192 /***********************************************************************
194 **********************************************************************/
195 static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle);
196 static void hb_ts_stream_init(hb_stream_t *stream);
197 static void hb_ts_stream_find_pids(hb_stream_t *stream);
198 static int hb_ts_stream_decode(hb_stream_t *stream, hb_buffer_t *obuf);
199 static void hb_ts_stream_reset(hb_stream_t *stream);
200 static hb_audio_t *hb_ts_stream_set_audio_id_and_codec(hb_stream_t *stream,
202 static void hb_ps_stream_find_audio_ids(hb_stream_t *stream, hb_title_t *title);
203 static off_t align_to_next_packet(hb_stream_t *stream);
205 static int ffmpeg_open( hb_stream_t *stream, hb_title_t *title );
206 static void ffmpeg_close( hb_stream_t *d );
207 static hb_title_t *ffmpeg_title_scan( hb_stream_t *stream );
208 static int ffmpeg_read( hb_stream_t *stream, hb_buffer_t *buf );
209 static int ffmpeg_seek( hb_stream_t *stream, float frac );
212 * streams have a bunch of state that's learned during the scan. We don't
213 * want to throw away the state when scan does a close then relearn
214 * everything when reader does an open. So we save the stream state on
215 * the close following a scan and reuse it when 'reader' does an open.
217 static hb_list_t *stream_state_list;
219 static hb_stream_t *hb_stream_lookup( const char *path )
221 if ( stream_state_list == NULL )
227 while ( ( ss = hb_list_item( stream_state_list, i++ ) ) != NULL )
229 if ( strcmp( path, ss->path ) == 0 )
237 static void hb_stream_state_delete( hb_stream_t *ss )
239 hb_list_rem( stream_state_list, ss );
246 * these frontend hb_log because transport streams can have a lot of errors
247 * so we want to rate limit messages. this routine limits the number of
248 * messages to at most one per minute of video. other errors that occur
249 * during the minute are counted & the count is output with the next
250 * error msg we print.
252 static void ts_warn_helper( hb_stream_t *stream, char *log, va_list args )
254 // limit error printing to at most one per minute of video (at 30fps)
256 if ( stream->frames - stream->last_error_frame >= 30*60 )
260 vsnprintf( msg, sizeof(msg), log, args );
262 if ( stream->errors - stream->last_error_count < 10 )
264 hb_log( "stream: error near frame %d: %s", stream->frames, msg );
268 int Edelta = stream->errors - stream->last_error_count;
269 double Epcnt = (double)Edelta * 100. /
270 (stream->frames - stream->last_error_frame);
271 hb_log( "stream: %d new errors (%.0f%%) up to frame %d: %s",
272 Edelta, Epcnt, stream->frames, msg );
274 stream->last_error_frame = stream->frames;
275 stream->last_error_count = stream->errors;
279 static void ts_warn( hb_stream_t*, char*, ... ) HB_WPRINTF(2,3);
280 static void ts_err( hb_stream_t*, int, char*, ... ) HB_WPRINTF(3,4);
282 static void ts_warn( hb_stream_t *stream, char *log, ... )
285 va_start( args, log );
286 ts_warn_helper( stream, log, args );
290 static void ts_err( hb_stream_t *stream, int curstream, char *log, ... )
293 va_start( args, log );
294 ts_warn_helper( stream, log, args );
297 stream->ts_skipbad[curstream] = 1;
298 stream->ts_pos[curstream] = 0;
299 stream->ts_streamcont[curstream] = -1;
302 static int check_ps_sync(const uint8_t *buf)
304 // a legal MPEG program stream must start with a Pack header in the
306 return (buf[0] == 0x00) && (buf[1] == 0x00) &&
307 (buf[2] == 0x01) && (buf[3] == 0xba);
310 static int check_ps_sc(const uint8_t *buf)
312 // a legal MPEG program stream must start with a Pack followed by a
313 // some other start code. If we've already verified the pack, this skip
314 // it and checks for a start code prefix.
315 int pos = 14 + ( buf[13] & 0x7 ); // skip over the PACK
316 return (buf[pos+0] == 0x00) && (buf[pos+1] == 0x00) && (buf[pos+2] == 0x01);
319 static int check_ts_sync(const uint8_t *buf)
321 // must have initial sync byte, no scrambling & a legal adaptation ctrl
322 return (buf[0] == 0x47) && ((buf[3] >> 6) == 0) && ((buf[3] >> 4) > 0);
325 static int have_ts_sync(const uint8_t *buf, int psize)
327 return check_ts_sync(&buf[0*psize]) && check_ts_sync(&buf[1*psize]) &&
328 check_ts_sync(&buf[2*psize]) && check_ts_sync(&buf[3*psize]) &&
329 check_ts_sync(&buf[4*psize]) && check_ts_sync(&buf[5*psize]) &&
330 check_ts_sync(&buf[6*psize]) && check_ts_sync(&buf[7*psize]);
333 static int hb_stream_check_for_ts(const uint8_t *buf)
335 // transport streams should have a sync byte every 188 bytes.
336 // search the first 8KB of buf looking for at least 8 consecutive
337 // correctly located sync patterns.
340 for ( offset = 0; offset < 8*1024-8*188; ++offset )
342 if ( have_ts_sync( &buf[offset], 188) )
343 return 188 | (offset << 8);
344 if ( have_ts_sync( &buf[offset], 192) )
345 return 192 | (offset << 8);
346 if ( have_ts_sync( &buf[offset], 204) )
347 return 204 | (offset << 8);
348 if ( have_ts_sync( &buf[offset], 208) )
349 return 208 | (offset << 8);
354 static int hb_stream_check_for_ps(const uint8_t *buf)
356 // program streams should start with a PACK then some other mpeg start
357 // code (usually a SYS but that might be missing if we only have a clip).
358 return check_ps_sync(buf) && check_ps_sc(buf);
361 static int hb_stream_check_for_dvd_ps(const uint8_t *buf)
363 // DVD program streams should have a Pack header every 2048 bytes.
364 // check that we have 4 of these in a row.
365 return check_ps_sync(&buf[0*2048]) && check_ps_sync(&buf[1*2048]) &&
366 check_ps_sync(&buf[2*2048]) && check_ps_sync(&buf[3*2048]);
369 static int hb_stream_get_type(hb_stream_t *stream)
373 if ( fread(buf, 1, sizeof(buf), stream->file_handle) == sizeof(buf) )
376 if ( ( psize = hb_stream_check_for_ts(buf) ) != 0 )
378 int offset = psize >> 8;
380 hb_log("file is MPEG Transport Stream with %d byte packets"
381 " offset %d bytes", psize, offset);
382 stream->packetsize = psize;
383 stream->hb_stream_type = transport;
384 hb_ts_stream_init(stream);
385 if ( !stream->ts_number_video_pids || !stream->ts_number_audio_pids )
391 if ( hb_stream_check_for_dvd_ps(buf) != 0 )
393 hb_log("file is MPEG DVD Program Stream");
394 stream->hb_stream_type = dvd_program;
397 if ( hb_stream_check_for_ps(buf) != 0 )
399 hb_log("file is MPEG Program Stream");
400 stream->hb_stream_type = program;
407 static void hb_stream_delete_dynamic( hb_stream_t *d )
411 fclose( d->file_handle );
412 d->file_handle = NULL;
419 free( d->ts_packet );
422 for (i = 0; i < kMaxNumberDecodeStreams; i++)
426 hb_buffer_close(&(d->ts_buf[i]));
432 static void hb_stream_delete( hb_stream_t *d )
434 hb_stream_delete_dynamic( d );
439 static int audio_inactive( hb_stream_t *stream, int indx )
441 int aud_indx = indx - 1;
443 if ( stream->ts_audio_pids[aud_indx] < 0 )
445 // PID declared inactive by hb_stream_title_scan
448 if ( stream->ts_audio_pids[aud_indx] == stream->pmt_info.PCR_PID )
450 // PCR PID is always active
454 // see if we should make the stream inactive because scan.c didn't
455 // find a valid audio bitstream.
457 for ( i = 0; i < hb_list_count( stream->title->list_audio ); ++i )
459 hb_audio_t *audio = hb_list_item( stream->title->list_audio, i );
460 if ( audio->id == indx )
465 // not in the title's audio list - declare the PID inactive
466 stream->ts_audio_pids[aud_indx] = -stream->ts_audio_pids[aud_indx];
470 /***********************************************************************
472 ***********************************************************************
474 **********************************************************************/
475 hb_stream_t * hb_stream_open( char *path, hb_title_t *title )
477 FILE *f = fopen( path, "rb" );
480 hb_log( "hb_stream_open: open %s failed", path );
484 hb_stream_t *d = calloc( sizeof( hb_stream_t ), 1 );
488 hb_log( "hb_stream_open: can't allocate space for %s stream state", path );
493 * if we're opening the stream to read & convert, we need
494 * the state we saved when we scanned the stream. if we're
495 * opening the stream to scan it we want to rebuild the state
496 * (even if we have saved state, the stream may have changed).
498 hb_stream_t *ss = hb_stream_lookup( path );
499 if ( title && ss && ss->hb_stream_type != ffmpeg )
502 * copy the saved state since we might be encoding the same stream
505 memcpy( d, ss, sizeof(*d) );
508 d->path = strdup( path );
510 if ( d->hb_stream_type == transport )
512 d->ts_packet = malloc( d->packetsize );
515 for ( ; i < d->ts_number_video_pids + d->ts_number_audio_pids; i++)
517 if ( i && audio_inactive( d, i ) )
519 // this PID isn't wanted (we don't have a codec for it
520 // or scan didn't find audio parameters)
523 d->ts_buf[i] = hb_buffer_init(d->packetsize);
524 d->ts_buf[i]->size = 0;
526 hb_stream_seek( d, 0. );
532 * opening for scan - delete any saved state then (re)scan the stream.
533 * If it's something we can deal with (MPEG2 PS or TS) return a stream
534 * reference structure & null otherwise.
538 hb_stream_state_delete( ss );
542 d->path = strdup( path );
543 if (d->path != NULL )
545 if ( hb_stream_get_type( d ) != 0 )
549 fclose( d->file_handle );
550 d->file_handle = NULL;
551 if ( ffmpeg_open( d, title ) )
556 if ( d->file_handle )
558 fclose( d->file_handle );
564 hb_log( "hb_stream_open: open %s failed", path );
569 /***********************************************************************
571 ***********************************************************************
572 * Closes and frees everything
573 **********************************************************************/
574 void hb_stream_close( hb_stream_t ** _d )
576 hb_stream_t *stream = * _d;
578 if ( stream->hb_stream_type == ffmpeg )
580 ffmpeg_close( stream );
581 hb_stream_delete( stream );
586 if ( stream->frames )
588 hb_log( "stream: %d good frames, %d errors (%.0f%%)", stream->frames,
589 stream->errors, (double)stream->errors * 100. /
590 (double)stream->frames );
594 * if the stream was opened for a scan, cache the result, otherwise delete
597 if ( stream->title == NULL )
599 hb_stream_delete_dynamic( stream );
600 if ( stream_state_list == NULL )
602 stream_state_list = hb_list_init();
604 hb_list_add( stream_state_list, stream );
608 hb_stream_delete( stream );
613 /* when the file was first opened we made entries for all the audio elementary
614 * streams we found in it. Streams that were later found during the preview scan
615 * now have an audio codec, type, rate, etc., associated with them. At the end
616 * of the scan we delete all the audio entries that weren't found by the scan
617 * or don't have a format we support. This routine deletes audio entry 'indx'
618 * by setting its PID to an invalid value so no packet will match it. (We can't
619 * move any of the entries since the index of the entry is used as the id
620 * of the media stream for HB. */
621 static void hb_stream_delete_audio_entry(hb_stream_t *stream, int indx)
623 if ( stream->ts_audio_pids[indx] > 0 )
625 stream->ts_audio_pids[indx] = -stream->ts_audio_pids[indx];
629 static int index_of_pid(int pid, hb_stream_t *stream)
633 if ( pid == stream->ts_video_pids[0] )
636 for ( i = 0; i < stream->ts_number_audio_pids; ++i )
637 if ( pid == stream->ts_audio_pids[i] )
643 /***********************************************************************
644 * hb_ps_stream_title_scan
645 ***********************************************************************
647 **********************************************************************/
648 hb_title_t * hb_stream_title_scan(hb_stream_t *stream)
650 if ( stream->hb_stream_type == ffmpeg )
651 return ffmpeg_title_scan( stream );
654 hb_title_t *aTitle = hb_title_init( stream->path, 0 );
657 // Copy part of the stream path to the title name
658 char *sep = strrchr(stream->path, '/');
660 strcpy(aTitle->name, sep+1);
661 char *dot_term = strrchr(aTitle->name, '.');
665 // Height, width, rate and aspect ratio information is filled in when the previews are built
667 hb_stream_duration(stream, aTitle);
670 hb_chapter_t * chapter;
671 chapter = calloc( sizeof( hb_chapter_t ), 1 );
673 chapter->duration = aTitle->duration;
674 chapter->hours = aTitle->hours;
675 chapter->minutes = aTitle->minutes;
676 chapter->seconds = aTitle->seconds;
677 hb_list_add( aTitle->list_chapter, chapter );
679 // Figure out how many audio streams we really have:
680 // - For transport streams, for each PID listed in the PMT (whether
681 // or not it was an audio stream type) read the bitstream until we
682 // find an packet from that PID containing a PES header and see if
683 // the elementary stream is an audio type.
684 // - For program streams read the first 4MB and take every unique
685 // audio stream we find.
686 if (stream->hb_stream_type == transport)
690 for (i=0; i < stream->ts_number_audio_pids; i++)
692 hb_audio_t *audio = hb_ts_stream_set_audio_id_and_codec(stream, i);
693 if (audio->config.in.codec)
694 hb_list_add( aTitle->list_audio, audio );
698 hb_stream_delete_audio_entry(stream, i);
702 // make sure we're grabbing the PCR PID
703 if ( index_of_pid( stream->pmt_info.PCR_PID, stream ) < 0 )
705 stream->ts_audio_pids[stream->ts_number_audio_pids++] =
706 stream->pmt_info.PCR_PID;
709 // set the video id, codec & muxer
710 aTitle->video_id = 0;
711 aTitle->video_codec = st2codec[stream->ts_stream_type[0]].codec;
712 aTitle->video_codec_param = st2codec[stream->ts_stream_type[0]].codec_param;
713 aTitle->demuxer = HB_MPEG2_TS_DEMUXER;
715 if ( ( stream->ts_flags & TS_HAS_PCR ) == 0 )
717 hb_log( "transport stream missing PCRs - using video DTS instead" );
720 if ( stream->ts_IDRs < 1 )
722 hb_log( "transport stream doesn't seem to have video IDR frames" );
723 aTitle->flags |= HBTF_NO_IDR;
728 hb_ps_stream_find_audio_ids(stream, aTitle);
735 * read the next transport stream packet from 'stream'. Return NULL if
736 * we hit eof & a pointer to the sync byte otherwise.
738 static const uint8_t *next_packet( hb_stream_t *stream )
740 uint8_t *buf = stream->ts_packet + stream->packetsize - 188;
744 if ( fread(stream->ts_packet, 1, stream->packetsize, stream->file_handle) !=
753 // lost sync - back up to where we started then try to re-establish.
754 off_t pos = ftello(stream->file_handle) - stream->packetsize;
755 off_t pos2 = align_to_next_packet(stream);
758 hb_log( "next_packet: eof while re-establishing sync @ %"PRId64, pos );
761 ts_warn( stream, "next_packet: sync lost @ %"PRId64", regained after %"PRId64" bytes",
767 * skip to the start of the next PACK header in program stream src_stream.
769 static void skip_to_next_pack( hb_stream_t *src_stream )
771 // scan forward until we find the start of the next pack
772 uint32_t strt_code = -1;
775 flockfile( src_stream->file_handle );
776 while ( ( c = getc_unlocked( src_stream->file_handle ) ) != EOF )
778 strt_code = ( strt_code << 8 ) | c;
779 if ( strt_code == 0x000001ba )
780 // we found the start of the next pack
783 funlockfile( src_stream->file_handle );
785 // if we didn't terminate on an eof back up so the next read
786 // starts on the pack boundary.
789 fseeko( src_stream->file_handle, -4, SEEK_CUR );
793 static int isIframe( hb_stream_t *stream, const uint8_t *buf, int adapt_len )
795 // For mpeg2: look for a gop start or i-frame picture start
796 // for h.264: look for idr nal type or a slice header for an i-frame
797 // for vc1: look for a Sequence header
802 if ( stream->ts_stream_type[0] <= 2 )
804 // This section of the code handles MPEG-1 and MPEG-2 video streams
805 for (i = 13 + adapt_len; i < 188; i++)
807 strid = (strid << 8) | buf[i];
808 if ( ( strid >> 8 ) == 1 )
810 // we found a start code
814 case 0xB8: // group_start_code (GOP header)
815 case 0xB3: // sequence_header code
818 case 0x00: // picture_start_code
819 // picture_header, let's see if it's an I-frame
822 // check if picture_coding_type == 1
823 if ((buf[i+2] & (0x7 << 3)) == (1 << 3))
825 // found an I-frame picture
833 // didn't find an I-frame
836 if ( stream->ts_stream_type[0] == 0x1b )
838 // we have an h.264 stream
839 for (i = 13 + adapt_len; i < 188; i++)
841 strid = (strid << 8) | buf[i];
842 if ( ( strid >> 8 ) == 1 )
844 // we found a start code - remove the ref_idc from the nal type
845 uint8_t nal_type = strid & 0x1f;
846 if ( nal_type == 0x05 )
847 // h.264 IDR picture start
851 // didn't find an I-frame
854 if ( stream->ts_stream_type[0] == 0xea )
856 // we have an vc1 stream
857 for (i = 13 + adapt_len; i < 188; i++)
859 strid = (strid << 8) | buf[i];
860 if ( strid == 0x10f )
862 // the ffmpeg vc1 decoder requires a seq hdr code in the first
867 // didn't find an I-frame
871 // we don't understand the stream type so just say "yes" otherwise
872 // we'll discard all the video.
877 * scan the next MB of 'stream' to find the next start packet for
878 * the Packetized Elementary Stream associated with TS PID 'pid'.
880 static const uint8_t *hb_ts_stream_getPEStype(hb_stream_t *stream, uint32_t pid)
882 int npack = 300000; // max packets to read
886 const uint8_t *buf = next_packet( stream );
889 hb_log("hb_ts_stream_getPEStype: EOF while searching for PID 0x%x", pid);
893 // while we're reading the stream, check if it has valid PCRs
894 // and/or random access points.
895 uint32_t pack_pid = ( (buf[1] & 0x1f) << 8 ) | buf[2];
896 if ( pack_pid == stream->pmt_info.PCR_PID )
898 if ( ( buf[5] & 0x10 ) &&
899 ( ( ( buf[3] & 0x30 ) == 0x20 ) ||
900 ( ( buf[3] & 0x30 ) == 0x30 && buf[4] > 6 ) ) )
902 stream->ts_flags |= TS_HAS_PCR;
907 stream->ts_flags |= TS_HAS_RAP;
911 * The PES header is only in TS packets with 'start' set so we check
912 * that first then check for the right PID.
914 if ((buf[1] & 0x40) == 0 || pack_pid != pid )
916 // not a start packet or not the pid we want
920 /* skip over the TS hdr to return a pointer to the PES hdr */
922 switch (buf[3] & 0x30)
924 case 0x00: // illegal
925 case 0x20: // fill packet
928 case 0x30: // adaptation
931 hb_log("hb_ts_stream_getPEStype: invalid adaptation field length %d for PID 0x%x", buf[4], pid);
937 /* PES hdr has to begin with an mpeg start code */
938 if (buf[udata+0] == 0x00 && buf[udata+1] == 0x00 && buf[udata+2] == 0x01)
948 static uint64_t hb_ps_stream_getVideoPTS(hb_stream_t *stream)
950 hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
951 hb_list_t *list = hb_list_init();
952 // how many blocks we read while searching for a video PES header
956 while (--blksleft >= 0 && hb_stream_read(stream, buf) == 1)
960 // 'buf' contains an MPEG2 PACK - get a list of all it's elementary streams
961 hb_demux_ps( buf, list, 0 );
963 while ( ( es = hb_list_item( list, 0 ) ) )
965 hb_list_rem( list, es );
966 if ( es->id == 0xe0 )
968 // this PES contains video - if there's a PTS we're done
969 // hb_demux_ps left the PTS in buf_es->start.
970 if ( es->start != ~0 )
977 hb_buffer_close( &es );
980 hb_list_empty( &list );
981 hb_buffer_close(&buf);
985 /***********************************************************************
987 ***********************************************************************
989 * Finding stream duration is difficult. One issue is that the video file
990 * may have chunks from several different program fragments (main feature,
991 * commercials, station id, trailers, etc.) all with their own base pts
992 * value. We can't find the piece boundaries without reading the entire
993 * file but if we compute a rate based on time stamps from two different
994 * pieces the result will be meaningless. The second issue is that the
995 * data rate of compressed video normally varies by 5-10x over the length
996 * of the video. This says that we want to compute the rate over relatively
997 * long segments to get a representative average but long segments increase
998 * the likelihood that we'll cross a piece boundary.
1000 * What we do is take time stamp samples at several places in the file
1001 * (currently 16) then compute the average rate (i.e., ticks of video per
1002 * byte of the file) for all pairs of samples (N^2 rates computed for N
1003 * samples). Some of those rates will be absurd because the samples came
1004 * from different segments. Some will be way low or high because the
1005 * samples came from a low or high motion part of the segment. But given
1006 * that we're comparing *all* pairs the majority of the computed rates
1007 * should be near the overall average. So we median filter the computed
1008 * rates to pick the most representative value.
1010 **********************************************************************/
1012 uint64_t pos; /* file position of this PTS sample */
1013 uint64_t pts; /* PTS from video stream */
1016 #define NDURSAMPLES 128
1018 // get one (position, timestamp) sampple from a transport or program
1020 static struct pts_pos hb_sample_pts(hb_stream_t *stream, uint64_t fpos)
1022 struct pts_pos pp = { 0, 0 };
1024 if ( stream->hb_stream_type == transport )
1027 fseeko( stream->file_handle, fpos, SEEK_SET );
1028 align_to_next_packet( stream );
1029 buf = hb_ts_stream_getPEStype( stream, stream->ts_video_pids[0] );
1032 hb_log("hb_sample_pts: couldn't find video packet near %"PRIu64, fpos);
1035 if ( ( buf[7] >> 7 ) != 1 )
1037 hb_log("hb_sample_pts: no PTS in video packet near %"PRIu64, fpos);
1040 pp.pts = ( ( (uint64_t)buf[9] >> 1 ) & 7 << 30 ) |
1041 ( (uint64_t)buf[10] << 22 ) |
1042 ( ( (uint64_t)buf[11] >> 1 ) << 15 ) |
1043 ( (uint64_t)buf[12] << 7 ) |
1044 ( (uint64_t)buf[13] >> 1 );
1046 if ( isIframe( stream, buf, -4 ) )
1048 if ( stream->ts_IDRs < 255 )
1056 // round address down to nearest dvd sector start
1057 fpos &=~ ( HB_DVD_READ_BUFFER_SIZE - 1 );
1058 fseeko( stream->file_handle, fpos, SEEK_SET );
1059 if ( stream->hb_stream_type == program )
1061 skip_to_next_pack( stream );
1063 pp.pts = hb_ps_stream_getVideoPTS( stream );
1065 pp.pos = ftello(stream->file_handle);
1069 static int dur_compare( const void *a, const void *b )
1071 const double *aval = a, *bval = b;
1072 return ( *aval < *bval ? -1 : ( *aval == *bval ? 0 : 1 ) );
1075 // given an array of (position, time) samples, compute a max-likelihood
1076 // estimate of the average rate by computing the rate between all pairs
1077 // of samples then taking the median of those rates.
1078 static double compute_stream_rate( struct pts_pos *pp, int n )
1081 double rates[NDURSAMPLES * NDURSAMPLES / 8];
1084 // the following nested loops compute the rates between all pairs.
1086 for ( i = 0; i < n-1; ++i )
1088 // Bias the median filter by not including pairs that are "far"
1089 // from one another. This is to handle cases where the file is
1090 // made of roughly equal size pieces where a symmetric choice of
1091 // pairs results in having the same number of intra-piece &
1092 // inter-piece rate estimates. This would mean that the median
1093 // could easily fall in the inter-piece part of the data which
1094 // would give a bogus estimate. The 'ns' index creates an
1095 // asymmetry that favors locality.
1096 int ns = i + ( n >> 3 );
1099 for ( j = i+1; j < ns; ++j )
1101 if ( (uint64_t)(pp[j].pts - pp[i].pts) > 90000LL*3600*6 )
1103 if ( pp[j].pts != pp[i].pts && pp[j].pos > pp[i].pos )
1105 *rp = ((double)( pp[j].pts - pp[i].pts )) /
1106 ((double)( pp[j].pos - pp[i].pos ));
1111 // now compute and return the median of all the (n*n/2) rates we computed
1113 int nrates = rp - rates;
1114 qsort( rates, nrates, sizeof (rates[0] ), dur_compare );
1115 return rates[nrates >> 1];
1118 static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle)
1120 struct pts_pos ptspos[NDURSAMPLES];
1121 struct pts_pos *pp = ptspos;
1124 fseeko(stream->file_handle, 0, SEEK_END);
1125 uint64_t fsize = ftello(stream->file_handle);
1126 uint64_t fincr = fsize / NDURSAMPLES;
1127 uint64_t fpos = fincr / 2;
1128 for ( i = NDURSAMPLES; --i >= 0; fpos += fincr )
1130 *pp++ = hb_sample_pts(stream, fpos);
1132 uint64_t dur = compute_stream_rate( ptspos, pp - ptspos ) * (double)fsize;
1133 inTitle->duration = dur;
1135 inTitle->hours = dur / 3600;
1136 inTitle->minutes = ( dur % 3600 ) / 60;
1137 inTitle->seconds = dur % 60;
1139 rewind(stream->file_handle);
1142 /***********************************************************************
1144 ***********************************************************************
1146 **********************************************************************/
1147 int hb_stream_read( hb_stream_t * src_stream, hb_buffer_t * b )
1149 if ( src_stream->hb_stream_type == ffmpeg )
1151 return ffmpeg_read( src_stream, b );
1153 if ( src_stream->hb_stream_type == dvd_program )
1155 size_t amt_read = fread(b->data, HB_DVD_READ_BUFFER_SIZE, 1,
1156 src_stream->file_handle);
1157 return (amt_read > 0);
1159 if ( src_stream->hb_stream_type == program )
1161 // a general program stream has arbitrary sized pack's. we're
1162 // currently positioned at the start of a pack so read up to but
1163 // not including the start of the next, expanding the buffer
1165 uint8_t *cp = b->data;
1166 uint8_t *ep = cp + b->alloc;
1167 uint32_t strt_code = -1;
1170 // consume the first byte of the initial pack so we don't match on
1171 // it in the loop below.
1172 if ( ( c = getc( src_stream->file_handle ) ) == EOF )
1177 flockfile( src_stream->file_handle );
1178 while ( ( c = getc_unlocked( src_stream->file_handle ) ) != EOF )
1180 strt_code = ( strt_code << 8 ) | c;
1181 if ( strt_code == 0x000001ba )
1182 // we found the start of the next pack
1186 // need to expand the buffer
1187 int curSize = cp - b->data;
1188 hb_buffer_realloc( b, curSize * 2 );
1189 cp = b->data + curSize;
1190 ep = b->data + b->alloc;
1194 funlockfile( src_stream->file_handle );
1196 // if we didn't terminate on an eof back up so the next read
1197 // starts on the pack boundary.
1198 b->size = cp - b->data;
1201 fseeko( src_stream->file_handle, -4, SEEK_CUR );
1206 return hb_ts_stream_decode( src_stream, b );
1209 int hb_stream_seek_chapter( hb_stream_t * stream, int chapter_num )
1212 if ( stream->hb_stream_type != ffmpeg )
1214 // currently meaningliess for transport and program streams
1217 if ( !stream || !stream->title ||
1218 chapter_num > hb_list_count( stream->title->list_chapter ) )
1223 int64_t sum_dur = 0;
1224 hb_chapter_t *chapter = NULL;
1226 for ( i = 0; i < chapter_num; ++i)
1228 chapter = hb_list_item( stream->title->list_chapter, i );
1229 sum_dur += chapter->duration;
1231 stream->chapter = chapter_num - 1;
1232 stream->chapter_end = sum_dur;
1234 int64_t pos = ( ( ( sum_dur - chapter->duration ) * AV_TIME_BASE ) / 90000 );
1236 hb_deep_log( 2, "Seeking to chapter %d: starts %"PRId64", ends %"PRId64", AV pos %"PRId64,
1237 chapter_num, sum_dur - chapter->duration, sum_dur, pos);
1239 if ( chapter_num > 1 && pos > 0 )
1241 av_seek_frame( stream->ffmpeg_ic, -1, pos, 0);
1246 /***********************************************************************
1248 ***********************************************************************
1249 * Return the number of the chapter that we are currently in. We store
1250 * the chapter number starting from 0, so + 1 for the real chpater num.
1251 **********************************************************************/
1252 int hb_stream_chapter( hb_stream_t * src_stream )
1254 return( src_stream->chapter + 1 );
1257 /***********************************************************************
1259 ***********************************************************************
1261 **********************************************************************/
1262 int hb_stream_seek( hb_stream_t * stream, float f )
1264 if ( stream->hb_stream_type == ffmpeg )
1266 return ffmpeg_seek( stream, f );
1268 off_t stream_size, cur_pos, new_pos;
1269 double pos_ratio = f;
1270 cur_pos = ftello( stream->file_handle );
1271 fseeko( stream->file_handle, 0, SEEK_END );
1272 stream_size = ftello( stream->file_handle );
1273 new_pos = (off_t) ((double) (stream_size) * pos_ratio);
1274 new_pos &=~ (HB_DVD_READ_BUFFER_SIZE - 1);
1276 int r = fseeko( stream->file_handle, new_pos, SEEK_SET );
1279 fseeko( stream->file_handle, cur_pos, SEEK_SET );
1283 if ( stream->hb_stream_type == transport )
1285 // We need to drop the current decoder output and move
1286 // forwards to the next transport stream packet.
1287 hb_ts_stream_reset(stream);
1290 if ( stream->ts_IDRs )
1292 // the stream has IDRs so look for one.
1293 stream->need_keyframe = 1;
1298 // we're at the beginning - say we have video sync so that we
1299 // won't drop initial SPS & PPS data on an AVC stream.
1300 stream->need_keyframe = 0;
1303 else if ( stream->hb_stream_type == program )
1305 skip_to_next_pack( stream );
1311 static const char* make_upper( const char* s )
1313 static char name[8];
1315 char *ep = cp + sizeof(name)-1;
1317 while ( *s && cp < ep )
1319 *cp++ = islower(*s)? toupper(*s) : *s;
1326 static void set_audio_description( hb_audio_t *audio, iso639_lang_t *lang )
1329 * This is a duplicate of code in dvd.c - it should get factored out
1330 * into a common routine. We probably should only be putting the lang
1331 * code or a lang pointer into the audio config & let the common description
1332 * formatting routine in scan.c do all the stuff below.
1334 const char *codec_name;
1337 if ( audio->config.in.codec == HB_ACODEC_FFMPEG &&
1338 ( cc = hb_ffmpeg_context( audio->config.in.codec_param ) ) &&
1339 avcodec_find_decoder( cc->codec_id ) )
1341 codec_name = make_upper( avcodec_find_decoder( cc->codec_id )->name );
1342 if ( !strcmp( codec_name, "LIBFAAD" ) )
1347 else if ( audio->config.in.codec == HB_ACODEC_MPGA &&
1348 avcodec_find_decoder( audio->config.in.codec_param ) )
1350 codec_name = avcodec_find_decoder( audio->config.in.codec_param )->name;
1354 codec_name = audio->config.in.codec == HB_ACODEC_AC3 ? "AC3" :
1355 audio->config.in.codec == HB_ACODEC_DCA ? "DTS" :
1356 audio->config.in.codec == HB_ACODEC_MPGA ? "MPEG" :
1357 audio->config.in.codec == HB_ACODEC_LPCM ? "LPCM" :
1358 audio->config.in.codec == HB_ACODEC_FFMPEG ? "FFMPEG" :
1361 snprintf( audio->config.lang.description,
1362 sizeof( audio->config.lang.description ), "%s (%s)",
1363 strlen(lang->native_name) ? lang->native_name : lang->eng_name,
1365 snprintf( audio->config.lang.simple, sizeof( audio->config.lang.simple ), "%s",
1366 strlen(lang->native_name) ? lang->native_name : lang->eng_name );
1367 snprintf( audio->config.lang.iso639_2, sizeof( audio->config.lang.iso639_2 ),
1368 "%s", lang->iso639_2);
1371 static hb_audio_t *hb_ts_stream_set_audio_id_and_codec(hb_stream_t *stream,
1374 off_t cur_pos = ftello(stream->file_handle);
1375 hb_audio_t *audio = calloc( sizeof( hb_audio_t ), 1 );
1378 fseeko(stream->file_handle, 0, SEEK_SET);
1379 align_to_next_packet(stream);
1380 buf = hb_ts_stream_getPEStype(stream, stream->ts_audio_pids[aud_pid_index]);
1382 /* check that we found a PES header */
1384 if (buf && buf[0] == 0x00 && buf[1] == 0x00 && buf[2] == 0x01)
1386 stype = stream->ts_stream_type[1 + aud_pid_index];
1388 // 0xbd ("private stream 1") is the normal container for non-ISO
1389 // media - AC3/DCA/PCM/etc.
1390 if ( buf[3] == 0xbd )
1392 if ( st2codec[stype].kind == U )
1394 // XXX assume unknown stream types are AC-3 (if they're not
1395 // audio we'll find that out during the scan but if they're
1396 // some other type of audio we'll end up ignoring them).
1398 stream->ts_stream_type[1 + aud_pid_index] = 0x81;
1401 else if ( buf[3] == 0xfd )
1403 // 0xfd indicates an extended stream id (ISO 13818-1(2007)).
1404 // the blu ray consortium apparently forgot to read the portion
1405 // of the MPEG spec that says one PID should map to one media
1406 // stream and multiplexed multiple types of audio into one PID
1407 // using the extended stream identifier of the PES header to
1408 // distinguish them. So we have to check if that's happening and
1409 // if so tell the runtime what esid we want.
1410 if ( st2codec[stype].kind == A && stype == 0x83 &&
1411 stream->ts_format_id[1 + aud_pid_index] == TS_FORMAT_ID_AC3 )
1413 // This is an interleaved TrueHD/AC-3 stream and the esid of
1415 stream->ts_multiplexed[1 + aud_pid_index] = 0x76;
1417 stream->ts_stream_type[1 + aud_pid_index] = 0x81;
1419 if ( st2codec[stype].kind == A && stype == 0x86 )
1421 // This is an interleaved DTS-HD/DTS stream and the esid of
1423 stream->ts_multiplexed[1 + aud_pid_index] = 0x71;
1425 stream->ts_stream_type[1 + aud_pid_index] = 0x82;
1428 else if ((buf[3] & 0xe0) == 0xc0)
1430 // 0xC0 - 0xCF are the normal containers for ISO-standard
1431 // media (mpeg2 audio and mpeg4 AAC).
1432 if ( st2codec[stype].kind == U )
1434 // XXX assume unknown stream types are MPEG audio
1436 stream->ts_stream_type[1 + aud_pid_index] = 0x03;
1444 // if we found an audio stream type & HB has a codec that can decode it
1445 // finish configuring the audio so we'll add it to the title's list.
1446 if ( st2codec[stype].kind == A && st2codec[stype].codec )
1448 audio->id = 1 + aud_pid_index;
1449 audio->config.in.codec = st2codec[stype].codec;
1450 audio->config.in.codec_param = st2codec[stype].codec_param;
1451 set_audio_description( audio,
1452 lang_for_code( stream->a52_info[aud_pid_index].lang_code ) );
1453 hb_log("transport stream pid 0x%x (type 0x%x) may be %s audio (id 0x%x)",
1454 stream->ts_audio_pids[aud_pid_index],
1455 stype, st2codec[stype].name, audio->id);
1461 hb_log("transport stream pid 0x%x (type 0x%x, substream 0x%x) "
1462 "isn't audio", stream->ts_audio_pids[aud_pid_index],
1463 stream->ts_stream_type[1 + aud_pid_index], buf[3]);
1467 hb_log("transport stream pid 0x%x (type 0x%x) isn't audio",
1468 stream->ts_audio_pids[aud_pid_index],
1469 stream->ts_stream_type[1 + aud_pid_index]);
1472 fseeko(stream->file_handle, cur_pos, SEEK_SET);
1476 static void add_audio_to_title(hb_title_t *title, int id)
1478 hb_audio_t *audio = calloc( sizeof( hb_audio_t ), 1 );
1484 audio->config.in.codec = HB_ACODEC_MPGA;
1485 hb_log("add_audio_to_title: added MPEG audio stream 0x%x", id);
1488 // type 2 is a DVD subtitle stream - just ignore it */
1492 audio->config.in.codec = HB_ACODEC_AC3;
1493 hb_log("add_audio_to_title: added AC3 audio stream 0x%x", id);
1496 audio->config.in.codec = HB_ACODEC_LPCM;
1497 hb_log("add_audio_to_title: added LPCM audio stream 0x%x", id);
1500 hb_log("add_audio_to_title: unknown audio stream type 0x%x", id);
1505 set_audio_description( audio, lang_for_code( 0 ) );
1506 hb_list_add( title->list_audio, audio );
1509 static void hb_ps_stream_find_audio_ids(hb_stream_t *stream, hb_title_t *title)
1511 off_t cur_pos = ftello(stream->file_handle);
1512 hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
1513 hb_list_t *list = hb_list_init();
1514 // how many blocks we read while searching for audio streams
1515 int blksleft = 4096;
1516 // there can be at most 16 unique streams in an MPEG PS (8 in a DVD)
1517 // so we use a bitmap to keep track of the ones we've already seen.
1518 // Bit 'i' of smap is set if we've already added the audio for
1519 // audio substream id 'i' to the title's audio list.
1522 // start looking 20% into the file since there's occasionally no
1523 // audio at the beginning (particularly for vobs).
1524 hb_stream_seek(stream, 0.2f);
1526 while (--blksleft >= 0 && hb_stream_read(stream, buf) == 1)
1530 // 'buf' contains an MPEG2 PACK - get a list of all it's elementary streams
1531 hb_demux_ps( buf, list, 0 );
1533 while ( ( es = hb_list_item( list, 0 ) ) )
1535 hb_list_rem( list, es );
1536 if ( (es->id & 0xff) == 0xbd || (es->id & 0xe0) == 0xc0 )
1538 // this PES contains some kind of audio - get the substream id
1539 // and check if we've seen it already.
1540 int ssid = (es->id > 0xff ? es->id >> 8 : es->id) & 0xf;
1541 if ( (smap & (1 << ssid)) == 0 )
1543 // we haven't seen this stream before - add it to the
1544 // title's list of audio streams.
1545 smap |= (1 << ssid);
1546 add_audio_to_title(title, es->id);
1549 hb_buffer_close( &es );
1552 hb_list_empty( &list );
1553 hb_buffer_close(&buf);
1554 fseeko(stream->file_handle, cur_pos, SEEK_SET);
1557 /***********************************************************************
1559 ***********************************************************************
1561 **********************************************************************/
1563 static void hb_ts_stream_init(hb_stream_t *stream)
1567 for (i=0; i < kMaxNumberDecodeStreams; i++)
1569 stream->ts_streamcont[i] = -1;
1571 stream->ts_video_pids[0] = -1;
1572 for ( i = 0; i < stream->ts_number_audio_pids; i++ )
1574 stream-> ts_audio_pids[i] = -1;
1577 stream->ts_packet = malloc( stream->packetsize );
1579 // Find the audio and video pids in the stream
1580 hb_ts_stream_find_pids(stream);
1582 for (i = 0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
1584 // demuxing buffer for TS to PS conversion
1585 stream->ts_buf[i] = hb_buffer_init(stream->packetsize);
1586 stream->ts_buf[i]->size = 0;
1590 #define MAX_HOLE 208*80
1592 static off_t align_to_next_packet(hb_stream_t *stream)
1594 uint8_t buf[MAX_HOLE];
1596 off_t start = ftello(stream->file_handle);
1598 if ( start >= stream->packetsize ) {
1599 start -= stream->packetsize;
1600 fseeko(stream->file_handle, start, SEEK_SET);
1603 if (fread(buf, sizeof(buf), 1, stream->file_handle) == 1)
1605 const uint8_t *bp = buf;
1608 for ( i = sizeof(buf); --i >= 0; ++bp )
1610 if ( have_ts_sync( bp, stream->packetsize ) )
1617 pos = ( bp - buf ) - stream->packetsize + 188;
1622 fseeko(stream->file_handle, start+pos, SEEK_SET);
1633 static const unsigned int bitmask[] = {
1634 0x0,0x1,0x3,0x7,0xf,0x1f,0x3f,0x7f,0xff,
1635 0x1ff,0x3ff,0x7ff,0xfff,0x1fff,0x3fff,0x7fff,0xffff,
1636 0x1ffff,0x3ffff,0x7ffff,0xfffff,0x1fffff,0x3fffff,0x7fffff,0xffffff,
1637 0x1ffffff,0x3ffffff,0x7ffffff,0xfffffff,0x1fffffff,0x3fffffff,0x7fffffff,0xffffffff};
1639 static inline void set_buf(bitbuf_t *bb, uint8_t* buf, int bufsize, int clear)
1643 bb->val = (bb->buf[0] << 24) | (bb->buf[1] << 16) |
1644 (bb->buf[2] << 8) | bb->buf[3];
1646 memset(bb->buf, 0, bufsize);
1649 static inline int buf_size(bitbuf_t *bb)
1651 return bb->pos >> 3;
1654 static inline unsigned int get_bits(bitbuf_t *bb, int bits)
1657 int left = 32 - (bb->pos & 31);
1661 val = (bb->val >> (left - bits)) & bitmask[bits];
1666 val = (bb->val & bitmask[left]) << (bits - left);
1670 int pos = bb->pos >> 3;
1671 bb->val = (bb->buf[pos] << 24) | (bb->buf[pos + 1] << 16) | (bb->buf[pos + 2] << 8) | bb->buf[pos + 3];
1675 val |= (bb->val >> (32 - bits)) & bitmask[bits];
1683 // extract what useful information we can from the elementary stream
1684 // descriptor list at 'dp' and add it to the stream at 'esindx'.
1685 // Descriptors with info we don't currently use are ignored.
1686 // The descriptor list & descriptor item formats are defined in
1687 // ISO 13818-1 (2000E) section 2.6 (pg. 62).
1688 static void decode_element_descriptors(hb_stream_t* stream, int esindx,
1689 const uint8_t *dp, uint8_t dlen)
1691 const uint8_t *ep = dp + dlen;
1697 case 5: // Registration descriptor
1698 stream->ts_format_id[esindx+1] = (dp[2] << 24) | (dp[3] << 16) |
1699 (dp[4] << 8) | dp[5];
1702 case 10: // ISO_639_language descriptor
1703 stream->a52_info[esindx].lang_code = lang_to_code(lang_for_code2((const char *)&dp[2]));
1706 case 0x6a: // DVB AC-3 descriptor
1707 stream->ts_stream_type[esindx+1] = 0x81;
1717 static const char *stream_type_name (uint8_t stream_type)
1719 return st2codec[stream_type].name? st2codec[stream_type].name : "Unknown";
1722 int decode_program_map(hb_stream_t* stream)
1725 set_buf(&bb, stream->pmt_info.tablebuf, stream->pmt_info.tablepos, 0);
1727 get_bits(&bb, 8); // table_id
1729 unsigned int section_length = get_bits(&bb, 12);
1730 stream->pmt_info.section_length = section_length;
1732 unsigned int program_number = get_bits(&bb, 16);
1733 stream->pmt_info.program_number = program_number;
1735 get_bits(&bb, 5); // version_number
1737 get_bits(&bb, 8); // section_number
1738 get_bits(&bb, 8); // last_section_number
1740 unsigned int PCR_PID = get_bits(&bb, 13);
1741 stream->pmt_info.PCR_PID = PCR_PID;
1743 unsigned int program_info_length = get_bits(&bb, 12);
1744 stream->pmt_info.program_info_length = program_info_length;
1747 unsigned char *descriptor_buf = (unsigned char *) malloc(program_info_length);
1748 for (i = 0; i < program_info_length; i++)
1750 descriptor_buf[i] = get_bits(&bb, 8);
1753 int cur_pos = 9 /* data after the section length field*/ + program_info_length;
1754 int done_reading_stream_types = 0;
1755 while (!done_reading_stream_types)
1757 unsigned char stream_type = get_bits(&bb, 8);
1759 unsigned int elementary_PID = get_bits(&bb, 13);
1761 unsigned int ES_info_length = get_bits(&bb, 12);
1764 unsigned char *ES_info_buf = (unsigned char *) malloc(ES_info_length);
1765 for (i=0; i < ES_info_length; i++)
1767 ES_info_buf[i] = get_bits(&bb, 8);
1771 if ( index_of_pid( elementary_PID, stream ) < 0 )
1773 // don't have this pid yet
1774 if (stream->ts_number_video_pids == 0 &&
1775 st2codec[stream_type].kind == V )
1777 stream->ts_video_pids[0] = elementary_PID;
1778 stream->ts_stream_type[0] = stream_type;
1779 stream->ts_number_video_pids = 1;
1783 // Defined audio stream types are 0x81 for AC-3/A52 audio
1784 // and 0x03 for mpeg audio. But content producers seem to
1785 // use other values (0x04 and 0x06 have both been observed)
1786 // so at this point we say everything that isn't a video
1787 // pid is audio then at the end of hb_stream_title_scan
1788 // we'll figure out which are really audio by looking at
1790 i = stream->ts_number_audio_pids;
1791 if (i < kMaxNumberAudioPIDS)
1793 stream->ts_audio_pids[i] = elementary_PID;
1794 stream->ts_stream_type[1 + i] = stream_type;
1795 if (ES_info_length > 0)
1797 decode_element_descriptors(stream, i, ES_info_buf,
1800 ++stream->ts_number_audio_pids;
1805 cur_pos += 5 /* stream header */ + ES_info_length;
1809 if (cur_pos >= section_length - 4 /* stop before the CRC */)
1810 done_reading_stream_types = 1;
1813 free(descriptor_buf);
1817 static int build_program_map(const uint8_t *buf, hb_stream_t *stream)
1819 // Get adaption header info
1821 int adaption = (buf[3] & 0x30) >> 4;
1824 else if (adaption == 0x2)
1826 else if (adaption == 0x3)
1827 adapt_len = buf[4] + 1;
1828 if (adapt_len > 184)
1831 // Get payload start indicator
1833 start = (buf[1] & 0x40) != 0;
1835 // Get pointer length - only valid in packets with a start flag
1836 int pointer_len = 0;
1840 pointer_len = buf[4 + adapt_len] + 1;
1841 stream->pmt_info.tablepos = 0;
1843 // Get Continuity Counter
1844 int continuity_counter = buf[3] & 0x0f;
1845 if (!start && (stream->pmt_info.current_continuity_counter + 1 != continuity_counter))
1847 hb_log("build_program_map - Continuity Counter %d out of sequence - expected %d", continuity_counter, stream->pmt_info.current_continuity_counter+1);
1850 stream->pmt_info.current_continuity_counter = continuity_counter;
1851 stream->pmt_info.reading |= start;
1853 // Add the payload for this packet to the current buffer
1854 int amount_to_copy = 184 - adapt_len - pointer_len;
1855 if (stream->pmt_info.reading && (amount_to_copy > 0))
1857 stream->pmt_info.tablebuf = realloc(stream->pmt_info.tablebuf, stream->pmt_info.tablepos + amount_to_copy);
1859 memcpy(stream->pmt_info.tablebuf + stream->pmt_info.tablepos, buf + 4 + adapt_len + pointer_len, amount_to_copy);
1860 stream->pmt_info.tablepos += amount_to_copy;
1862 if (stream->pmt_info.tablepos > 3)
1864 // We have enough to check the section length
1866 length = ((stream->pmt_info.tablebuf[1] << 8) +
1867 stream->pmt_info.tablebuf[2]) & 0xFFF;
1868 if (stream->pmt_info.tablepos > length + 1)
1870 // We just finished a bunch of packets - parse the program map details
1872 if (stream->pmt_info.tablebuf[0] == 0x02)
1873 decode_ok = decode_program_map(stream);
1874 free(stream->pmt_info.tablebuf);
1875 stream->pmt_info.tablebuf = NULL;
1876 stream->pmt_info.tablepos = 0;
1877 stream->pmt_info.reading = 0;
1887 static int decode_PAT(const uint8_t *buf, hb_stream_t *stream)
1889 unsigned char tablebuf[1024];
1890 unsigned int tablepos = 0;
1895 // Get adaption header info
1897 int adaption = (buf[3] & 0x30) >> 4;
1900 else if (adaption == 0x2)
1902 else if (adaption == 0x3)
1903 adapt_len = buf[4] + 1;
1904 if (adapt_len > 184)
1907 // Get pointer length
1908 int pointer_len = buf[4 + adapt_len] + 1;
1910 // Get payload start indicator
1912 start = (buf[1] & 0x40) != 0;
1917 // Add the payload for this packet to the current buffer
1918 if (reading && (184 - adapt_len) > 0)
1920 if (tablepos + 184 - adapt_len - pointer_len > 1024)
1922 hb_log("decode_PAT - Bad program section length (> 1024)");
1925 memcpy(tablebuf + tablepos, buf + 4 + adapt_len + pointer_len, 184 - adapt_len - pointer_len);
1926 tablepos += 184 - adapt_len - pointer_len;
1929 if (start && reading)
1931 memcpy(tablebuf + tablepos, buf + 4 + adapt_len + 1, pointer_len - 1);
1934 unsigned int pos = 0;
1935 //while (pos < tablepos)
1938 set_buf(&bb, tablebuf + pos, tablepos - pos, 0);
1940 unsigned char section_id = get_bits(&bb, 8);
1942 unsigned int section_len = get_bits(&bb, 12);
1943 get_bits(&bb, 16); // transport_id
1945 get_bits(&bb, 5); // version_num
1946 get_bits(&bb, 1); // current_next
1947 get_bits(&bb, 8); // section_num
1948 get_bits(&bb, 8); // last_section
1954 // Program Association Section
1955 section_len -= 5; // Already read transport stream ID, version num, section num, and last section num
1956 section_len -= 4; // Ignore the CRC
1958 stream->ts_number_pat_entries = 0;
1959 while ((curr_pos < section_len) && (stream->ts_number_pat_entries < kMaxNumberPMTStreams))
1961 unsigned int pkt_program_num = get_bits(&bb, 16);
1962 stream->pat_info[stream->ts_number_pat_entries].program_number = pkt_program_num;
1964 get_bits(&bb, 3); // Reserved
1965 if (pkt_program_num == 0)
1967 get_bits(&bb, 13); // pkt_network_id
1971 unsigned int pkt_program_map_PID = get_bits(&bb, 13);
1972 stream->pat_info[stream->ts_number_pat_entries].program_map_PID = pkt_program_map_PID;
1975 stream->ts_number_pat_entries++;
1989 pos += 3 + section_len;
1997 static void hb_ts_stream_find_pids(hb_stream_t *stream)
1999 // To be different from every other broadcaster in the world, New Zealand TV
2000 // changes PMTs (and thus video & audio PIDs) when 'programs' change. Since
2001 // we may have the tail of the previous program at the beginning of this
2002 // file, take our PMT from the middle of the file.
2003 fseeko(stream->file_handle, 0, SEEK_END);
2004 uint64_t fsize = ftello(stream->file_handle);
2005 fseeko(stream->file_handle, fsize >> 1, SEEK_SET);
2006 align_to_next_packet(stream);
2008 // Read the Transport Stream Packets (188 bytes each) looking at first for PID 0 (the PAT PID), then decode that
2009 // to find the program map PID and then decode that to get the list of audio and video PIDs
2013 const uint8_t *buf = next_packet( stream );
2017 hb_log("hb_ts_stream_find_pids - end of file");
2022 int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
2024 if ((pid == 0x0000) && (stream->ts_number_pat_entries == 0))
2026 decode_PAT(buf, stream);
2031 for (pat_index = 0; pat_index < stream->ts_number_pat_entries; pat_index++)
2033 // There are some streams where the PAT table has multiple entries as if their are
2034 // multiple programs in the same transport stream, and yet there's actually only one
2035 // program really in the stream. This seems to be true for transport streams that
2036 // originate in the HDHomeRun but have been output by EyeTV's export utility. What I think
2037 // is happening is that the HDHomeRun is sending the entire transport stream as broadcast,
2038 // but the EyeTV is only recording a single (selected) program number and not rewriting the
2039 // PAT info on export to match what's actually on the stream.
2040 // Until we have a way of handling multiple programs per transport stream elegantly we'll match
2041 // on the first pat entry for which we find a matching program map PID. The ideal solution would
2042 // be to build a title choice popup from the PAT program number details and then select from
2043 // their - but right now the API's not capable of that.
2044 if (stream->pat_info[pat_index].program_number != 0 &&
2045 pid == stream->pat_info[pat_index].program_map_PID)
2047 if (build_program_map(buf, stream) > 0)
2051 // Keep going until we have a complete set of PIDs
2052 if ((stream->ts_number_video_pids > 0) && (stream->ts_number_audio_pids > 0))
2056 hb_log("hb_ts_stream_find_pids - found the following PIDS");
2057 hb_log(" Video PIDS : ");
2059 for (i=0; i < stream->ts_number_video_pids; i++)
2061 hb_log( " 0x%x type %s (0x%x)",
2062 stream->ts_video_pids[i],
2063 stream_type_name(stream->ts_stream_type[i]),
2064 stream->ts_stream_type[i]);
2066 hb_log(" Audio PIDS : ");
2067 for (i = 0; i < stream->ts_number_audio_pids; i++)
2069 hb_log( " 0x%x type %s (0x%x)",
2070 stream->ts_audio_pids[i],
2071 stream_type_name(stream->ts_stream_type[i+1]),
2072 stream->ts_stream_type[i+1] );
2077 static void fwrite64( hb_stream_t *stream, void *buf, int len )
2081 int pos = stream->fwrite_buf->size;
2082 if ( pos + len > stream->fwrite_buf->alloc )
2084 int size = MAX(stream->fwrite_buf->alloc * 2, pos + len);
2085 hb_buffer_realloc(stream->fwrite_buf, size);
2087 memcpy( &(stream->fwrite_buf->data[pos]), buf, len );
2088 stream->fwrite_buf->size += len;
2092 // convert a PES PTS or DTS to an int64
2093 static int64_t pes_timestamp( const uint8_t *pes )
2095 int64_t ts = ( (uint64_t)(pes[0] & 0xe ) << 29 );
2096 ts |= ( pes[1] << 22 ) | ( ( pes[2] >> 1 ) << 15 ) |
2097 ( pes[3] << 7 ) | ( pes[4] >> 1 );
2101 static void generate_output_data(hb_stream_t *stream, int curstream)
2103 hb_buffer_t *buf = stream->fwrite_buf;
2104 uint8_t *tdat = stream->ts_buf[curstream]->data;
2106 buf->id = curstream;
2108 // check if this packet was referenced to an older pcr and if that
2109 // pcr was significantly different than the one we're using now.
2110 // (the reason for the uint cast on the pcr difference is that the
2111 // difference is significant if it advanced by more than 200ms or if
2112 // it went backwards by any amount. The negative numbers look like huge
2113 // unsigned ints so the cast allows both conditions to be checked at once.
2114 int bufpcr = stream->ts_buf[curstream]->cur;
2115 int curpcr = stream->ts_pcr_out;
2116 if ( bufpcr && bufpcr < curpcr &&
2117 (uint64_t)(stream->ts_pcrhist[curpcr & 3] - stream->ts_pcrhist[bufpcr & 3]) > 200*90LL )
2119 // we've sent up a new pcr but have a packet referenced to an
2120 // old pcr and the difference was enough to trigger a discontinuity
2121 // correction. smash the timestamps or we'll mess up the correction.
2123 buf->renderOffset = -1;
2127 if ( stream->ts_pcr_out != stream->ts_pcr_in )
2129 // we have a new pcr
2130 stream->ts_pcr_out = stream->ts_pcr_in;
2131 buf->stop = stream->ts_pcr;
2132 stream->ts_pcrhist[stream->ts_pcr_out & 3] = stream->ts_pcr;
2139 // put the PTS & possible DTS into 'start' & 'renderOffset' then strip
2140 // off the PES header.
2141 if ( tdat[7] & 0xc0 )
2143 buf->start = pes_timestamp( tdat + 9 );
2144 buf->renderOffset = ( tdat[7] & 0x40 )? pes_timestamp( tdat + 14 ) :
2150 buf->renderOffset = -1;
2153 int hlen = tdat[8] + 9;
2155 fwrite64( stream, tdat + hlen, stream->ts_pos[curstream] - hlen );
2157 stream->ts_pos[curstream] = 0;
2158 stream->ts_buf[curstream]->size = 0;
2161 static void hb_ts_stream_append_pkt(hb_stream_t *stream, int idx, const uint8_t *buf, int len)
2163 if (stream->ts_pos[idx] + len > stream->ts_buf[idx]->alloc)
2167 size = MAX(stream->ts_buf[idx]->alloc * 2, stream->ts_pos[idx] + len);
2168 hb_buffer_realloc(stream->ts_buf[idx], size);
2170 memcpy(stream->ts_buf[idx]->data + stream->ts_pos[idx], buf, len);
2171 stream->ts_pos[idx] += len;
2172 stream->ts_buf[idx]->size += len;
2175 /***********************************************************************
2176 * hb_ts_stream_decode
2177 ***********************************************************************
2179 **********************************************************************/
2180 static int hb_ts_stream_decode( hb_stream_t *stream, hb_buffer_t *obuf )
2183 * stash the output buffer pointer in our stream so we don't have to
2184 * pass it & its original value to everything we call.
2187 stream->fwrite_buf = obuf;
2189 // spin until we get a packet of data from some stream or hit eof
2194 const uint8_t *buf = next_packet(stream);
2197 // end of file - we didn't finish filling our ps write buffer
2198 // so just discard the remainder (the partial buffer is useless)
2199 hb_log("hb_ts_stream_decode - eof");
2203 /* This next section validates the packet */
2205 // Get pid and use it to find stream state.
2206 int pid = ((buf[1] & 0x1F) << 8) | buf[2];
2207 if ( ( curstream = index_of_pid( pid, stream ) ) < 0 )
2211 int errorbit = (buf[1] & 0x80) != 0;
2214 ts_err( stream, curstream, "packet error bit set");
2218 // Get adaption header info
2219 int adaption = (buf[3] & 0x30) >> 4;
2223 ts_err( stream, curstream, "adaptation code 0");
2226 else if (adaption == 0x2)
2228 else if (adaption == 0x3)
2230 adapt_len = buf[4] + 1;
2231 if (adapt_len > 184)
2233 ts_err( stream, curstream, "invalid adapt len %d", adapt_len);
2238 if ( adapt_len > 0 )
2240 if ( buf[5] & 0x40 )
2242 // found a random access point
2244 // if there's an adaptation header & PCR_flag is set
2245 // get the PCR (Program Clock Reference)
2246 if ( adapt_len > 7 && ( buf[5] & 0x10 ) != 0 )
2248 stream->ts_pcr = ( (uint64_t)buf[6] << (33 - 8) ) |
2249 ( (uint64_t)buf[7] << (33 - 16) ) |
2250 ( (uint64_t)buf[8] << (33 - 24) ) |
2251 ( (uint64_t)buf[9] << (33 - 32) ) |
2253 ++stream->ts_pcr_in;
2254 stream->ts_found_pcr = 1;
2258 // If we don't have a PCR yet but the stream has PCRs just loop
2259 // so we don't process anything until we have a clock reference.
2260 // Unfortunately the HD Home Run appears to null out the PCR so if
2261 // we didn't detect a PCR during scan keep going and we'll use
2262 // the video stream DTS for the PCR.
2264 if ( !stream->ts_found_pcr && ( stream->ts_flags & TS_HAS_PCR ) )
2270 // Continuity only increments for adaption values of 0x3 or 0x01
2271 // and is not checked for start packets.
2273 int start = (buf[1] & 0x40) != 0;
2275 if ( (adaption & 0x01) != 0 )
2277 int continuity = (buf[3] & 0xF);
2278 if ( continuity == stream->ts_streamcont[curstream] )
2280 // Spliced transport streams can have duplicate
2281 // continuity counts at the splice boundary.
2282 // Test to see if the packet is really a duplicate
2283 // by comparing packet summaries to see if they
2287 summary[0] = adaption;
2288 summary[1] = adapt_len;
2289 if (adapt_len + 4 + 6 + 9 <= 188)
2291 memcpy(&summary[2], buf+4+adapt_len+9, 6);
2295 memset(&summary[2], 0, 6);
2297 if ( memcmp( summary, stream->ts_pkt_summary[curstream], 8 ) == 0 )
2299 // we got a duplicate packet (usually used to introduce
2300 // a PCR when one is needed). The only thing that can
2301 // change in the dup is the PCR which we grabbed above
2302 // so ignore the rest.
2306 if ( !start && (stream->ts_streamcont[curstream] != -1) &&
2307 !stream->ts_skipbad[curstream] &&
2308 (continuity != ( (stream->ts_streamcont[curstream] + 1) & 0xf ) ) )
2310 ts_err( stream, curstream, "continuity error: got %d expected %d",
2312 (stream->ts_streamcont[curstream] + 1) & 0xf );
2313 stream->ts_streamcont[curstream] = continuity;
2316 stream->ts_streamcont[curstream] = continuity;
2318 // Save a summary of this packet for later duplicate
2319 // testing. The summary includes some header information
2320 // and payload bytes. Should be enough to detect
2322 stream->ts_pkt_summary[curstream][0] = adaption;
2323 stream->ts_pkt_summary[curstream][1] = adapt_len;
2324 if (adapt_len + 4 + 6 + 9 <= 188)
2326 memcpy(&stream->ts_pkt_summary[curstream][2],
2327 buf+4+adapt_len+9, 6);
2331 memset(&stream->ts_pkt_summary[curstream][2], 0, 6);
2335 /* If we get here the packet is valid - process its data */
2339 // Found a random access point (now we can start a frame/audio packet..)
2341 if ( stream->need_keyframe )
2343 // we're looking for the first video frame because we're
2344 // doing random access during 'scan'
2345 if ( curstream != 0 || !isIframe( stream, buf, adapt_len ) )
2347 // not the video stream or didn't find an I frame
2348 // but we'll only wait 255 video frames for an I frame.
2349 if ( curstream != 0 || ++stream->need_keyframe )
2354 stream->need_keyframe = 0;
2357 // If we were skipping a bad packet, start fresh on this new PES packet..
2358 if (stream->ts_skipbad[curstream] == 1)
2360 stream->ts_skipbad[curstream] = 0;
2363 if ( curstream == 0 )
2367 // if we don't have a pcr yet use the dts from this frame
2368 if ( !stream->ts_found_pcr )
2370 // PES must begin with an mpeg start code & contain
2372 const uint8_t *pes = buf + adapt_len + 4;
2373 if ( pes[0] != 0x00 || pes[1] != 0x00 || pes[2] != 0x01 ||
2374 ( pes[7] >> 6 ) == 0 )
2378 // if we have a dts use it otherwise use the pts
2379 stream->ts_pcr = pes_timestamp( pes + ( pes[7] & 0x40? 14 : 9 ) );
2380 ++stream->ts_pcr_in;
2384 // if this is a multiplexed stream make sure this is the
2385 // substream we want.
2386 if ( stream->ts_multiplexed[curstream] )
2388 // PES must begin with an mpeg start code & contain
2390 const uint8_t *pes = buf + adapt_len + 4;
2391 if ( pes[0] != 0x00 || pes[1] != 0x00 || pes[2] != 0x01 ||
2394 stream->ts_skipbad[curstream] = 1;
2397 // the last byte of the header is the extension id. see if
2398 // it's the one we want.
2399 if ( pes[pes[8]+8] != stream->ts_multiplexed[curstream] )
2401 stream->ts_skipbad[curstream] = 1;
2406 // If we have some data already on this stream, turn it into
2407 // a program stream packet. Then add the payload for this
2408 // packet to the current pid's buffer.
2409 if ( stream->ts_pos[curstream] )
2411 // we have to ship the old packet before updating the pcr
2412 // since the packet we've been accumulating is referenced
2414 generate_output_data(stream, curstream);
2416 // remember the pcr that was in effect when we started
2418 stream->ts_buf[curstream]->cur = stream->ts_pcr_in;
2419 hb_ts_stream_append_pkt(stream, curstream, buf + 4 + adapt_len,
2423 // remember the pcr that was in effect when we started this packet.
2424 stream->ts_buf[curstream]->cur = stream->ts_pcr_in;
2427 // Add the payload for this packet to the current buffer
2428 if (!stream->ts_skipbad[curstream] && (184 - adapt_len) > 0)
2430 hb_ts_stream_append_pkt(stream, curstream, buf + 4 + adapt_len,
2432 // see if we've hit the end of this PES packet
2433 const uint8_t *pes = stream->ts_buf[curstream]->data;
2434 int len = ( pes[4] << 8 ) + pes[5] + 6;
2435 if ( len > 6 && stream->ts_pos[curstream] == len &&
2436 pes[0] == 0x00 && pes[1] == 0x00 && pes[2] == 0x01 )
2438 generate_output_data(stream, curstream);
2445 static void hb_ts_stream_reset(hb_stream_t *stream)
2449 for (i=0; i < kMaxNumberDecodeStreams; i++)
2451 stream->ts_pos[i] = 0;
2452 stream->ts_skipbad[i] = 1;
2453 stream->ts_streamcont[i] = -1;
2456 stream->need_keyframe = 0;
2458 stream->ts_found_pcr = 0;
2459 stream->ts_pcr_out = 0;
2460 stream->ts_pcr_in = 0;
2465 stream->last_error_frame = -10000;
2466 stream->last_error_count = 0;
2468 align_to_next_packet(stream);
2471 // ------------------------------------------------------------------
2472 // Support for reading media files via the ffmpeg libraries.
2474 static void ffmpeg_add_codec( hb_stream_t *stream, int stream_index )
2476 // add a codec to the context here so it will be there when we
2477 // read the first packet.
2478 AVCodecContext *context = stream->ffmpeg_ic->streams[stream_index]->codec;
2479 context->workaround_bugs = FF_BUG_AUTODETECT;
2480 context->error_recognition = 1;
2481 context->error_concealment = FF_EC_GUESS_MVS|FF_EC_DEBLOCK;
2482 AVCodec *codec = avcodec_find_decoder( context->codec_id );
2483 hb_avcodec_open( context, codec );
2486 // The ffmpeg stream reader / parser shares a lot of state with the
2487 // decoder via a codec context kept in the AVStream of the reader's
2488 // AVFormatContext. Since decoding is done in a different thread we
2489 // have to somehow pass this codec context to the decoder and we have
2490 // to do it before the first packet is read (so we can't put the info
2491 // in the buf we'll send downstream). Decoders don't have any way to
2492 // get to the stream directly (they're not passed the title or job
2493 // pointers during a scan) so this is a back door for the decoder to
2494 // get the codec context. We just stick the stream pointer in the next
2495 // slot an array of pointers maintained as a circular list then return
2496 // the index into the list combined with the ffmpeg stream index as the
2497 // codec_param that will be passed to the decoder init routine. We make
2498 // the list 'big' (enough for 1024 simultaneously open ffmpeg streams)
2499 // so that we don't have to do a complicated allocator or worry about
2500 // deleting entries on close.
2502 // Entries can only be added to this list during a scan and are never
2503 // deleted so the list access doesn't require locking.
2504 static hb_stream_t **ffmpeg_streams; // circular list of stream pointers
2505 static int ffmpeg_stream_cur; // where we put the last stream pointer
2506 #define ffmpeg_sl_bits (10) // log2 stream list size (in entries)
2507 #define ffmpeg_sl_size (1 << ffmpeg_sl_bits)
2509 // add a stream to the list & return the appropriate codec_param to access it
2510 static int ffmpeg_codec_param( hb_stream_t *stream, int stream_index )
2512 if ( !ffmpeg_streams )
2514 ffmpeg_streams = calloc( ffmpeg_sl_size, sizeof(stream) );
2517 // the title scan adds all the ffmpeg media streams at once so we
2518 // only add a new entry to our stream list if the stream is different
2520 int slot = ffmpeg_stream_cur;
2521 if ( ffmpeg_streams[slot] != stream )
2523 // new stream - put it in the next slot of the stream list
2524 slot = ++ffmpeg_stream_cur & (ffmpeg_sl_size - 1);
2525 ffmpeg_streams[slot] = stream;
2528 ffmpeg_add_codec( stream, stream_index );
2530 return ( stream_index << ffmpeg_sl_bits ) | slot;
2533 // we're about to open 'title' to convert it - remap the stream associated
2534 // with the video & audio codec params of the title to refer to 'stream'
2535 // (the original scan stream was closed and no longer exists).
2536 static void ffmpeg_remap_stream( hb_stream_t *stream, hb_title_t *title )
2538 // all the video & audio came from the same stream so remapping
2539 // the video's stream slot takes care of everything.
2540 int slot = title->video_codec_param & (ffmpeg_sl_size - 1);
2541 ffmpeg_streams[slot] = stream;
2543 // add codecs for all the streams used by the title
2544 ffmpeg_add_codec( stream, title->video_codec_param >> ffmpeg_sl_bits );
2548 for ( i = 0; ( audio = hb_list_item( title->list_audio, i ) ); ++i )
2550 if ( audio->config.in.codec == HB_ACODEC_FFMPEG )
2552 ffmpeg_add_codec( stream,
2553 audio->config.in.codec_param >> ffmpeg_sl_bits );
2558 void *hb_ffmpeg_context( int codec_param )
2560 int slot = codec_param & (ffmpeg_sl_size - 1);
2561 int stream_index = codec_param >> ffmpeg_sl_bits;
2562 return ffmpeg_streams[slot]->ffmpeg_ic->streams[stream_index]->codec;
2565 void *hb_ffmpeg_avstream( int codec_param )
2567 int slot = codec_param & (ffmpeg_sl_size - 1);
2568 int stream_index = codec_param >> ffmpeg_sl_bits;
2569 return ffmpeg_streams[slot]->ffmpeg_ic->streams[stream_index];
2572 static AVFormatContext *ffmpeg_deferred_close;
2574 static int ffmpeg_open( hb_stream_t *stream, hb_title_t *title )
2576 if ( ffmpeg_deferred_close )
2578 av_close_input_file( ffmpeg_deferred_close );
2579 ffmpeg_deferred_close = NULL;
2581 AVFormatContext *ic;
2583 av_log_set_level( AV_LOG_ERROR );
2584 if ( av_open_input_file( &ic, stream->path, NULL, 0, NULL ) < 0 )
2588 if ( av_find_stream_info( ic ) < 0 )
2591 stream->ffmpeg_ic = ic;
2592 stream->hb_stream_type = ffmpeg;
2593 stream->ffmpeg_pkt = malloc(sizeof(*stream->ffmpeg_pkt));
2594 av_init_packet( stream->ffmpeg_pkt );
2595 stream->chapter_end = INT64_MAX;
2599 // we're opening for read. scan passed out codec params that
2600 // indexed its stream so we need to remap them so they point
2602 ffmpeg_remap_stream( stream, title );
2603 av_log_set_level( AV_LOG_ERROR );
2607 // we're opening for scan. let ffmpeg put some info into the
2608 // log about what we've got.
2609 av_log_set_level( AV_LOG_INFO );
2610 dump_format( ic, 0, stream->path, 0 );
2611 av_log_set_level( AV_LOG_ERROR );
2613 // accept this file if it has at least one video stream we can decode
2615 for (i = 0; i < ic->nb_streams; ++i )
2617 if ( ic->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO )
2622 if ( i >= ic->nb_streams )
2628 av_close_input_file( ic );
2632 static void ffmpeg_close( hb_stream_t *d )
2634 // XXX since we're sharing the CodecContext with the downstream
2635 // decoder proc we can't close the stream. We need to reference count
2636 // this so we can close it when both are done with their instance but
2637 // for now just defer the close until the next stream open or close.
2638 if ( ffmpeg_deferred_close )
2640 av_close_input_file( ffmpeg_deferred_close );
2642 ffmpeg_deferred_close = d->ffmpeg_ic;
2643 if ( d->ffmpeg_pkt != NULL )
2645 free( d->ffmpeg_pkt );
2646 d->ffmpeg_pkt = NULL;
2650 static void add_ffmpeg_audio( hb_title_t *title, hb_stream_t *stream, int id )
2652 AVStream *st = stream->ffmpeg_ic->streams[id];
2653 AVCodecContext *codec = st->codec;
2655 // scan will ignore any audio without a bitrate. Since we've already
2656 // typed the audio in order to determine its codec we set up the audio
2658 if ( codec->bit_rate || codec->sample_rate )
2660 static const int chan2layout[] = {
2661 HB_INPUT_CH_LAYOUT_MONO, // We should allow no audio really.
2662 HB_INPUT_CH_LAYOUT_MONO,
2663 HB_INPUT_CH_LAYOUT_STEREO,
2664 HB_INPUT_CH_LAYOUT_2F1R,
2665 HB_INPUT_CH_LAYOUT_2F2R,
2666 HB_INPUT_CH_LAYOUT_3F2R,
2667 HB_INPUT_CH_LAYOUT_4F2R,
2668 HB_INPUT_CH_LAYOUT_STEREO,
2669 HB_INPUT_CH_LAYOUT_STEREO,
2672 hb_audio_t *audio = calloc( 1, sizeof(*audio) );;
2675 if ( codec->codec_id == CODEC_ID_AC3 )
2677 audio->config.in.codec = HB_ACODEC_AC3;
2679 else if ( codec->codec_id == CODEC_ID_DTS )
2681 audio->config.in.codec = HB_ACODEC_DCA;
2685 audio->config.in.codec = HB_ACODEC_FFMPEG;
2686 audio->config.in.codec_param = ffmpeg_codec_param( stream, id );
2688 audio->config.in.bitrate = codec->bit_rate? codec->bit_rate : 1;
2689 audio->config.in.samplerate = codec->sample_rate;
2690 audio->config.in.channel_layout = chan2layout[codec->channels & 7];
2693 set_audio_description( audio, lang_for_code2( st->language ) );
2695 hb_list_add( title->list_audio, audio );
2699 static hb_title_t *ffmpeg_title_scan( hb_stream_t *stream )
2701 AVFormatContext *ic = stream->ffmpeg_ic;
2703 // 'Barebones Title'
2704 hb_title_t *title = hb_title_init( stream->path, 0 );
2707 // Copy part of the stream path to the title name
2708 char *sep = strrchr(stream->path, '/');
2710 strcpy(title->name, sep+1);
2711 char *dot_term = strrchr(title->name, '.');
2715 uint64_t dur = ic->duration * 90000 / AV_TIME_BASE;
2716 title->duration = dur;
2718 title->hours = dur / 3600;
2719 title->minutes = ( dur % 3600 ) / 60;
2720 title->seconds = dur % 60;
2722 // set the title to decode the first video stream in the file
2723 title->demuxer = HB_NULL_DEMUXER;
2724 title->video_codec = 0;
2726 for (i = 0; i < ic->nb_streams; ++i )
2728 if ( ic->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO &&
2729 avcodec_find_decoder( ic->streams[i]->codec->codec_id ) &&
2730 title->video_codec == 0 )
2732 title->video_id = i;
2733 stream->ffmpeg_video_id = i;
2735 // We have to use the 'internal' avcodec decoder because
2736 // it needs to share the codec context from this video
2737 // stream. The parser internal to av_read_frame
2738 // passes a bunch of state info to the decoder via the context.
2739 title->video_codec = WORK_DECAVCODECVI;
2740 title->video_codec_param = ffmpeg_codec_param( stream, i );
2742 else if ( ic->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO &&
2743 avcodec_find_decoder( ic->streams[i]->codec->codec_id ) )
2745 add_ffmpeg_audio( title, stream, i );
2749 title->container_name = strdup( ic->iformat->name );
2750 title->data_rate = ic->bit_rate;
2752 hb_deep_log( 2, "Found ffmpeg %d chapters, container=%s", ic->nb_chapters, ic->iformat->name );
2754 if( ic->nb_chapters != 0 )
2757 uint64_t duration_sum = 0;
2758 for( i = 0; i < ic->nb_chapters; i++ )
2759 if( ( m = ic->chapters[i] ) != NULL )
2761 hb_chapter_t * chapter;
2762 chapter = calloc( sizeof( hb_chapter_t ), 1 );
2763 chapter->index = i+1;
2764 chapter->duration = ( m->end / ( (double) m->time_base.num * m->time_base.den ) ) * 90000 - duration_sum;
2765 duration_sum += chapter->duration;
2766 chapter->hours = chapter->duration / 90000 / 3600;
2767 chapter->minutes = ( ( chapter->duration / 90000 ) % 3600 ) / 60;
2768 chapter->seconds = ( chapter->duration / 90000 ) % 60;
2769 strcpy( chapter->title, m->title );
2770 hb_deep_log( 2, "Added chapter %i, name='%s', dur=%"PRIu64", (%02i:%02i:%02i)",
2771 chapter->index, chapter->title,
2772 chapter->duration, chapter->hours,
2773 chapter->minutes, chapter->seconds );
2774 hb_list_add( title->list_chapter, chapter );
2779 * Fill the metadata.
2781 decmetadata( title );
2783 if( hb_list_count( title->list_chapter ) == 0 )
2785 // Need at least one chapter
2786 hb_chapter_t * chapter;
2787 chapter = calloc( sizeof( hb_chapter_t ), 1 );
2789 chapter->duration = title->duration;
2790 chapter->hours = title->hours;
2791 chapter->minutes = title->minutes;
2792 chapter->seconds = title->seconds;
2793 hb_list_add( title->list_chapter, chapter );
2799 static int64_t av_to_hb_pts( int64_t pts, double conv_factor )
2801 if ( pts == AV_NOPTS_VALUE )
2803 return (int64_t)( (double)pts * conv_factor );
2806 static int ffmpeg_is_keyframe( hb_stream_t *stream )
2810 switch ( stream->ffmpeg_ic->streams[stream->ffmpeg_video_id]->codec->codec_id )
2813 // XXX the VC1 codec doesn't mark key frames so to get previews
2814 // we do it ourselves here. The decoder gets messed up if it
2815 // doesn't get a SEQ header first so we consider that to be a key frame.
2816 pkt = stream->ffmpeg_pkt->data;
2817 if ( !pkt[0] && !pkt[1] && pkt[2] == 1 && pkt[3] == 0x0f )
2823 // XXX the ffmpeg WMV3 codec doesn't mark key frames.
2824 // Only M$ could make I-frame detection this complicated: there
2825 // are two to four bits of unused junk ahead of the frame type
2826 // so we have to look at the sequence header to find out how much
2827 // to skip. Then there are three different ways of coding the type
2828 // depending on whether it's main or advanced profile then whether
2829 // there are bframes or not so we have to look at the sequence
2830 // header to get that.
2831 pkt = stream->ffmpeg_pkt->data;
2832 uint8_t *seqhdr = stream->ffmpeg_ic->streams[stream->ffmpeg_video_id]->codec->extradata;
2834 if ( ( seqhdr[3] & 0x02 ) == 0 )
2837 if ( ( seqhdr[3] & 0x80 ) == 0 )
2838 // no RANGEREDUCTION
2840 if ( seqhdr[3] & 0x70 )
2841 // stream has b-frames
2842 return ( ( pkt[0] >> pshift ) & 0x3 ) == 0x01;
2844 return ( ( pkt[0] >> pshift ) & 0x2 ) == 0;
2849 return ( stream->ffmpeg_pkt->flags & PKT_FLAG_KEY );
2852 static int ffmpeg_read( hb_stream_t *stream, hb_buffer_t *buf )
2856 if ( ( err = av_read_frame( stream->ffmpeg_ic, stream->ffmpeg_pkt )) < 0 )
2858 // XXX the following conditional is to handle avi files that
2859 // use M$ 'packed b-frames' and occasionally have negative
2860 // sizes for the null frames these require.
2861 if ( err != AVERROR_NOMEM || stream->ffmpeg_pkt->size >= 0 )
2865 if ( stream->ffmpeg_pkt->size <= 0 )
2867 // M$ "invalid and inefficient" packed b-frames require 'null frames'
2868 // following them to preserve the timing (since the packing puts two
2869 // or more frames in what looks like one avi frame). The contents and
2870 // size of these null frames are ignored by the ff_h263_decode_frame
2871 // as long as they're < 20 bytes. We need a positive size so we use
2872 // one byte if we're given a zero or negative size. We don't know
2873 // if the pkt data points anywhere reasonable so we just stick a
2874 // byte of zero in our outbound buf.
2880 if ( stream->ffmpeg_pkt->size > buf->alloc )
2882 // sometimes we get absurd sizes from ffmpeg
2883 if ( stream->ffmpeg_pkt->size >= (1 << 25) )
2885 hb_log( "ffmpeg_read: pkt too big: %d bytes", stream->ffmpeg_pkt->size );
2886 av_free_packet( stream->ffmpeg_pkt );
2887 return ffmpeg_read( stream, buf );
2889 // need to expand buffer
2890 hb_buffer_realloc( buf, stream->ffmpeg_pkt->size );
2892 memcpy( buf->data, stream->ffmpeg_pkt->data, stream->ffmpeg_pkt->size );
2893 buf->size = stream->ffmpeg_pkt->size;
2895 buf->id = stream->ffmpeg_pkt->stream_index;
2896 if ( buf->id == stream->ffmpeg_video_id )
2898 if ( stream->need_keyframe )
2900 // we've just done a seek (generally for scan or live preview) and
2901 // want to start at a keyframe. Some ffmpeg codecs seek to a key
2902 // frame but most don't. So we spin until we either get a keyframe
2903 // or we've looked through 50 video frames without finding one.
2904 if ( ! ffmpeg_is_keyframe( stream ) && ++stream->need_keyframe < 50 )
2906 av_free_packet( stream->ffmpeg_pkt );
2909 stream->need_keyframe = 0;
2914 // if we haven't done it already, compute a conversion factor to go
2915 // from the ffmpeg timebase for the stream to HB's 90KHz timebase.
2916 double tsconv = stream->ffmpeg_tsconv[stream->ffmpeg_pkt->stream_index];
2919 AVStream *s = stream->ffmpeg_ic->streams[stream->ffmpeg_pkt->stream_index];
2920 tsconv = 90000. * (double)s->time_base.num / (double)s->time_base.den;
2921 stream->ffmpeg_tsconv[stream->ffmpeg_pkt->stream_index] = tsconv;
2924 buf->start = av_to_hb_pts( stream->ffmpeg_pkt->pts, tsconv );
2925 buf->renderOffset = av_to_hb_pts( stream->ffmpeg_pkt->dts, tsconv );
2926 if ( buf->renderOffset >= 0 && buf->start == -1 )
2928 buf->start = buf->renderOffset;
2932 * Check to see whether this video buffer is on a chapter
2933 * boundary, if so mark it as such in the buffer then advance
2934 * chapter_end to the end of the next chapter.
2935 * If there are no chapters, chapter_end is always initialized to INT64_MAX
2936 * (roughly 3 million years at our 90KHz clock rate) so the test
2937 * below handles both the chapters & no chapters case.
2939 if ( buf->id == stream->ffmpeg_video_id && buf->start >= stream->chapter_end )
2941 hb_chapter_t *chapter = hb_list_item( stream->title->list_chapter,
2942 stream->chapter+1 );
2946 stream->chapter_end += chapter->duration;
2947 buf->new_chap = stream->chapter + 1;
2948 hb_deep_log( 2, "ffmpeg_read starting chapter %i at %"PRId64,
2949 buf->new_chap, buf->start);
2951 // Must have run out of chapters, stop looking.
2952 stream->chapter_end = INT64_MAX;
2957 av_free_packet( stream->ffmpeg_pkt );
2961 static int ffmpeg_seek( hb_stream_t *stream, float frac )
2963 AVFormatContext *ic = stream->ffmpeg_ic;
2966 int64_t pos = (double)ic->duration * (double)frac;
2967 if ( ic->start_time != AV_NOPTS_VALUE && ic->start_time > 0 )
2969 pos += ic->start_time;
2971 av_seek_frame( ic, -1, pos, 0 );
2972 stream->need_keyframe = 1;
2976 av_seek_frame( ic, -1, 0LL, AVSEEK_FLAG_BACKWARD );