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. */
9 #include "a52dec/a52.h"
13 #define min(a, b) a < b ? a : b
16 hb_stream_type_unknown = 0,
17 hb_stream_type_transport,
18 hb_stream_type_program
21 #define kMaxNumberVideoPIDS 1
22 #define kMaxNumberAudioPIDS 15
23 #define kMaxNumberDecodeStreams (kMaxNumberVideoPIDS+kMaxNumberAudioPIDS)
24 #define kMaxNumberPMTStreams 32
29 int frames; /* video frames so far */
30 int errors; /* total errors so far */
31 int last_error_frame; /* frame # at last error message */
32 int last_error_count; /* # errors at last error message */
34 int64_t ts_lastpcr; /* the last pcr we found in the TS stream */
35 int64_t ts_nextpcr; /* the next pcr to put in a PS packet */
37 uint8_t *ts_buf[kMaxNumberDecodeStreams];
38 int ts_pos[kMaxNumberDecodeStreams];
39 int8_t ts_foundfirst[kMaxNumberDecodeStreams];
40 int8_t ts_skipbad[kMaxNumberDecodeStreams];
41 int8_t ts_streamcont[kMaxNumberDecodeStreams];
42 int8_t ts_start[kMaxNumberDecodeStreams];
44 uint8_t *fwrite_buf; /* PS buffer (set by hb_ts_stream_decode) */
45 uint8_t *fwrite_buf_orig; /* PS buffer start (set by hb_ts_stream_decode) */
48 * Stuff before this point is dynamic state updated as we read the
49 * stream. Stuff after this point is stream description state that
50 * we learn during the initial scan but cache so it can be
51 * reused during the conversion read.
53 int16_t ts_video_pids[kMaxNumberVideoPIDS];
54 int16_t ts_audio_pids[kMaxNumberAudioPIDS];
56 uint8_t ts_number_video_pids;
57 uint8_t ts_number_audio_pids;
59 uint8_t ts_streamid[kMaxNumberDecodeStreams];
60 uint8_t ts_video_stream_type[kMaxNumberDecodeStreams];
61 uint8_t ts_audio_stream_type[kMaxNumberDecodeStreams];
65 hb_stream_type_t stream_type;
73 } a52_info[kMaxNumberAudioPIDS];
77 unsigned short program_number;
78 unsigned short program_map_PID;
79 } pat_info[kMaxNumberPMTStreams];
80 int ts_number_pat_entries;
85 unsigned char *tablebuf;
86 unsigned int tablepos;
87 unsigned char current_continuity_counter;
92 int program_info_length;
93 unsigned char *progam_info_descriptor_data;
96 unsigned char stream_type;
97 unsigned short elementary_PID;
98 unsigned short ES_info_length;
99 unsigned char *es_info_descriptor_data;
100 } pmt_stream_info[kMaxNumberPMTStreams];
104 /***********************************************************************
106 **********************************************************************/
107 static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle);
108 static void hb_ts_stream_init(hb_stream_t *stream);
109 static void hb_ts_stream_find_pids(hb_stream_t *stream);
110 static int hb_ts_stream_decode(hb_stream_t *stream, uint8_t *obuf);
111 static void hb_ts_stream_reset(hb_stream_t *stream);
112 static hb_audio_t *hb_ts_stream_set_audio_id_and_codec(hb_stream_t *stream,
114 static void hb_ps_stream_find_audio_ids(hb_stream_t *stream, hb_title_t *title);
115 static off_t align_to_next_packet(FILE* f);
118 * streams have a bunch of state that's learned during the scan. We don't
119 * want to throw away the state when scan does a close then relearn
120 * everything when reader does an open. So we save the stream state on
121 * the close following a scan and reuse it when 'reader' does an open.
123 static hb_list_t *stream_state_list;
125 static hb_stream_t *hb_stream_lookup( const char *path )
127 if ( stream_state_list == NULL )
133 while ( ( ss = hb_list_item( stream_state_list, i++ ) ) != NULL )
135 if ( strcmp( path, ss->path ) == 0 )
143 static void hb_stream_state_delete( hb_stream_t *ss )
145 hb_list_rem( stream_state_list, ss );
150 static inline int check_ps_sync(const uint8_t *buf)
152 // a legal MPEG program stream must start with a Pack header in the
154 return (buf[0] == 0x00) && (buf[1] == 0x00) &&
155 (buf[2] == 0x01) && (buf[3] == 0xba);
158 static inline int check_ts_sync(const uint8_t *buf)
160 // must have initial sync byte, no scrambling & a legal adaptation ctrl
161 return (buf[0] == 0x47) && ((buf[3] >> 6) == 0) && ((buf[3] >> 4) > 0);
164 static inline int have_ts_sync(const uint8_t *buf)
166 return check_ts_sync(&buf[0*188]) && check_ts_sync(&buf[1*188]) &&
167 check_ts_sync(&buf[2*188]) && check_ts_sync(&buf[3*188]) &&
168 check_ts_sync(&buf[4*188]) && check_ts_sync(&buf[5*188]) &&
169 check_ts_sync(&buf[6*188]) && check_ts_sync(&buf[7*188]);
172 static int hb_stream_check_for_ts(const uint8_t *buf)
174 // transport streams should have a sync byte every 188 bytes.
175 // search the first KB of buf looking for at least 8 consecutive
176 // correctly located sync patterns.
179 for ( offset = 0; offset < 1024; ++offset )
181 if ( have_ts_sync( &buf[offset]) )
187 static int hb_stream_check_for_ps(const uint8_t *buf)
189 // program streams should have a Pack header every 2048 bytes.
190 // check that we have 4 of these.
191 return check_ps_sync(&buf[0*2048]) && check_ps_sync(&buf[1*2048]) &&
192 check_ps_sync(&buf[2*2048]) && check_ps_sync(&buf[3*2048]);
195 static int hb_stream_get_type(hb_stream_t *stream)
199 if ( fread(buf, 1, sizeof(buf), stream->file_handle) == sizeof(buf) )
201 if ( hb_stream_check_for_ts(buf) != 0 )
203 hb_log("file is MPEG Transport Stream");
204 stream->stream_type = hb_stream_type_transport;
205 hb_ts_stream_init(stream);
208 if ( hb_stream_check_for_ps(buf) != 0 )
210 hb_log("file is MPEG Program Stream");
211 stream->stream_type = hb_stream_type_program;
218 static void hb_stream_delete_dynamic( hb_stream_t *d )
222 fclose( d->file_handle );
223 d->file_handle = NULL;
228 for (i = 0; i < kMaxNumberDecodeStreams; i++)
238 static void hb_stream_delete( hb_stream_t *d )
240 hb_stream_delete_dynamic( d );
245 /***********************************************************************
247 ***********************************************************************
249 **********************************************************************/
250 hb_stream_t * hb_stream_open( char *path, int opentype )
253 FILE *f = fopen( path, "r" );
256 hb_log( "hb_stream_open: open %s failed", path );
260 hb_stream_t *d = calloc( sizeof( hb_stream_t ), 1 );
264 hb_log( "hb_stream_open: can't allocate space for %s stream state", path );
269 * if we're opening the stream to read & convert, we need
270 * the state we saved when we scanned the stream. if we're
271 * opening the stream to scan it we want to rebuild the state
272 * (even if we have saved state, the stream may have changed).
274 hb_stream_t *ss = hb_stream_lookup( path );
277 /* opening to read - we must have saved state */
280 hb_log( "hb_stream_open: error: re-opening %s but no scan state", path );
286 * copy the saved state since we might be encoding the same stream
289 memcpy( d, ss, sizeof(*d) );
291 d->opentype = opentype;
292 d->path = strdup( path );
294 if ( d->stream_type == hb_stream_type_transport )
297 for ( ; i < d->ts_number_video_pids + d->ts_number_audio_pids; i++)
299 d->ts_buf[i] = malloc( HB_DVD_READ_BUFFER_SIZE );
301 hb_stream_seek( d, 0. );
307 * opening for scan - delete any saved state then (re)scan the stream.
308 * If it's something we can deal with (MPEG2 PS or TS) return a stream
309 * reference structure & null otherwise.
314 hb_stream_state_delete( ss );
317 d->opentype = opentype;
318 d->path = strdup( path );
319 if (d->path != NULL && hb_stream_get_type( d ) != 0 )
323 fclose( d->file_handle );
328 hb_log( "hb_stream_open: open %s failed", path );
333 /***********************************************************************
335 ***********************************************************************
336 * Closes and frees everything
337 **********************************************************************/
338 void hb_stream_close( hb_stream_t ** _d )
340 hb_stream_t *stream = * _d;
341 if ( stream->frames )
343 hb_log( "stream: %d good frames, %d errors (%.0f%%)", stream->frames,
344 stream->errors, (double)stream->errors * 100. /
345 (double)stream->frames );
348 * if the stream was opened for a scan, cache the result, otherwise delete
351 if ( stream->opentype == 0 )
353 hb_stream_delete_dynamic( stream );
354 if ( stream_state_list == NULL )
356 stream_state_list = hb_list_init();
358 hb_list_add( stream_state_list, stream );
362 hb_stream_delete( stream );
367 /* when the file was first opened we made entries for all the audio elementary
368 * streams we found in it. Streams that were later found during the preview scan
369 * now have an audio codec, type, rate, etc., associated with them. At the end
370 * of the scan we delete all the audio entries that weren't found by the scan
371 * or don't have a format we support. This routine deletes audio entry 'indx'
372 * by copying all later entries down one slot. */
373 static void hb_stream_delete_audio_entry(hb_stream_t *stream, int indx)
377 for (i = indx+1; i < stream->ts_number_audio_pids; ++i)
379 stream->ts_audio_pids[indx] = stream->ts_audio_pids[i];
380 stream->ts_audio_stream_type[1 + indx] = stream->ts_audio_stream_type[1+i];
381 stream->ts_streamid[1 + indx] = stream->ts_streamid[1 + i];
384 --stream->ts_number_audio_pids;
387 static int index_of_pid(int pid, hb_stream_t *stream)
391 if ( pid == stream->ts_video_pids[0] )
394 for ( i = 0; i < stream->ts_number_audio_pids; ++i )
395 if ( pid == stream->ts_audio_pids[i] )
401 /***********************************************************************
402 * hb_ps_stream_title_scan
403 ***********************************************************************
405 **********************************************************************/
406 hb_title_t * hb_stream_title_scan(hb_stream_t *stream)
409 hb_title_t *aTitle = hb_title_init( stream->path, 0 );
412 // Copy part of the stream path to the title name
413 char *sep = strrchr(stream->path, '/');
415 strcpy(aTitle->name, sep+1);
416 char *dot_term = strrchr(aTitle->name, '.');
420 // Height, width, rate and aspect ratio information is filled in when the previews are built
422 hb_stream_duration(stream, aTitle);
425 hb_chapter_t * chapter;
426 chapter = calloc( sizeof( hb_chapter_t ), 1 );
428 chapter->duration = aTitle->duration;
429 chapter->hours = aTitle->hours;
430 chapter->minutes = aTitle->minutes;
431 chapter->seconds = aTitle->seconds;
432 hb_list_add( aTitle->list_chapter, chapter );
434 // Figure out how many audio streams we really have:
435 // - For transport streams, for each PID listed in the PMT (whether
436 // or not it was an audio stream type) read the bitstream until we
437 // find an packet from that PID containing a PES header and see if
438 // the elementary stream is an audio type.
439 // - For program streams read the first 4MB and take every unique
440 // audio stream we find.
441 if (stream->stream_type == hb_stream_type_transport)
445 for (i=0; i < stream->ts_number_audio_pids; i++)
447 hb_audio_t *audio = hb_ts_stream_set_audio_id_and_codec(stream, i);
448 if (audio->config.in.codec)
449 hb_list_add( aTitle->list_audio, audio );
453 hb_stream_delete_audio_entry(stream, i);
458 // add the PCR PID if we don't already have it
459 if ( index_of_pid( stream->pmt_info.PCR_PID, stream ) < 0 )
461 stream->ts_audio_pids[stream->ts_number_audio_pids++] =
462 stream->pmt_info.PCR_PID;
467 hb_ps_stream_find_audio_ids(stream, aTitle);
474 * scan the next MB of 'stream' to find the next start packet for
475 * the Packetized Elementary Stream associated with TS PID 'pid'.
477 static const uint8_t *hb_ts_stream_getPEStype(hb_stream_t *stream, uint32_t pid)
479 static uint8_t buf[188];
480 int npack = 100000; // max packets to read
484 if (fread(buf, 1, 188, stream->file_handle) != 188)
486 hb_log("hb_ts_stream_getPEStype: EOF while searching for PID 0x%x", pid);
491 hb_log("hb_ts_stream_getPEStype: lost sync while searching for PID 0x%x", pid);
492 align_to_next_packet(stream->file_handle);
497 * The PES header is only in TS packets with 'start' set so we check
498 * that first then check for the right PID.
500 if ((buf[1] & 0x40) == 0 || (buf[1] & 0x1f) != (pid >> 8) ||
501 buf[2] != (pid & 0xff))
503 // not a start packet or not the pid we want
507 /* skip over the TS hdr to return a pointer to the PES hdr */
509 switch (buf[3] & 0x30)
511 case 0x00: // illegal
512 case 0x20: // fill packet
515 case 0x30: // adaptation
518 hb_log("hb_ts_stream_getPEStype: invalid adaptation field length %d for PID 0x%x", buf[4], pid);
531 static uint64_t hb_ps_stream_getVideoPTS(hb_stream_t *stream)
533 hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
534 hb_list_t *list = hb_list_init();
535 // how many blocks we read while searching for a video PES header
539 while (--blksleft >= 0 && hb_stream_read(stream, buf) == 1)
543 // 'buf' contains an MPEG2 PACK - get a list of all it's elementary streams
544 hb_demux_ps(buf, list);
546 while ( ( es = hb_list_item( list, 0 ) ) )
548 hb_list_rem( list, es );
549 if ( es->id == 0xe0 )
551 // this PES contains video - if there's a PTS we're done
552 // hb_demux_ps left the PTS in buf_es->start.
553 if ( es->start != ~0 )
560 hb_buffer_close( &es );
563 hb_list_empty( &list );
564 hb_buffer_close(&buf);
568 /***********************************************************************
570 ***********************************************************************
572 * Finding stream duration is difficult. One issue is that the video file
573 * may have chunks from several different program fragments (main feature,
574 * commercials, station id, trailers, etc.) all with their own base pts
575 * value. We can't find the piece boundaries without reading the entire
576 * file but if we compute a rate based on time stamps from two different
577 * pieces the result will be meaningless. The second issue is that the
578 * data rate of compressed video normally varies by 5-10x over the length
579 * of the video. This says that we want to compute the rate over relatively
580 * long segments to get a representative average but long segments increase
581 * the likelihood that we'll cross a piece boundary.
583 * What we do is take time stamp samples at several places in the file
584 * (currently 16) then compute the average rate (i.e., ticks of video per
585 * byte of the file) for all pairs of samples (N^2 rates computed for N
586 * samples). Some of those rates will be absurd because the samples came
587 * from different segments. Some will be way low or high because the
588 * samples came from a low or high motion part of the segment. But given
589 * that we're comparing *all* pairs the majority of the computed rates
590 * should be near the overall average. So we median filter the computed
591 * rates to pick the most representative value.
593 **********************************************************************/
595 uint64_t pos; /* file position of this PTS sample */
596 uint64_t pts; /* PTS from video stream */
599 #define NDURSAMPLES 16
601 // get one (position, timestamp) sampple from a transport or program
603 static struct pts_pos hb_sample_pts(hb_stream_t *stream, uint64_t fpos)
605 struct pts_pos pp = { 0, 0 };
607 if ( stream->stream_type == hb_stream_type_program )
609 // round address down to nearest dvd sector start
610 fpos &=~ ( HB_DVD_READ_BUFFER_SIZE - 1 );
611 fseeko( stream->file_handle, fpos, SEEK_SET );
612 pp.pts = hb_ps_stream_getVideoPTS( stream );
617 fseeko( stream->file_handle, fpos, SEEK_SET );
618 align_to_next_packet( stream->file_handle );
619 buf = hb_ts_stream_getPEStype( stream, stream->ts_video_pids[0] );
622 hb_log("hb_sample_pts: couldn't find video packet near %llu", fpos);
625 if ( ( buf[7] >> 7 ) != 1 )
627 hb_log("hb_sample_pts: no PTS in video packet near %llu", fpos);
630 pp.pts = ( ( (uint64_t)buf[9] >> 1 ) & 7 << 30 ) |
631 ( (uint64_t)buf[10] << 22 ) |
632 ( ( (uint64_t)buf[11] >> 1 ) << 15 ) |
633 ( (uint64_t)buf[12] << 7 ) |
634 ( (uint64_t)buf[13] >> 1 );
636 pp.pos = ftello(stream->file_handle);
637 hb_log("hb_sample_pts: pts %lld at %llu", pp.pts, pp.pos );
641 static int dur_compare( const void *a, const void *b )
643 const double *aval = a, *bval = b;
644 return ( *aval < *bval ? -1 : ( *aval == *bval ? 0 : 1 ) );
647 // given an array of (position, time) samples, compute a max-likelihood
648 // estimate of the average rate by computing the rate between all pairs
649 // of samples then taking the median of those rates.
650 static double compute_stream_rate( struct pts_pos *pp, int n )
653 double rates[NDURSAMPLES * NDURSAMPLES / 2];
656 // the following nested loops compute the rates between all pairs.
658 for ( i = 0; i < n-1; ++i )
660 // Bias the median filter by not including pairs that are "far"
661 // from one another. This is to handle cases where the file is
662 // made of roughly equal size pieces where a symmetric choice of
663 // pairs results in having the same number of intra-piece &
664 // inter-piece rate estimates. This would mean that the median
665 // could easily fall in the inter-piece part of the data which
666 // would give a bogus estimate. The 'ns' index creates an
667 // asymmetry that favors locality.
668 int ns = i + ( n >> 1 );
671 for ( j = i+1; j < ns; ++j )
673 if ( pp[j].pts != pp[i].pts && pp[j].pos > pp[i].pos )
675 *rp = ((double)( pp[j].pts - pp[i].pts )) /
676 ((double)( pp[j].pos - pp[i].pos ));
681 // now compute and return the median of all the (n*n/2) rates we computed
683 int nrates = rp - rates;
684 qsort( rates, nrates, sizeof (rates[0] ), dur_compare );
685 return rates[nrates >> 1];
688 static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle)
690 struct pts_pos ptspos[NDURSAMPLES];
691 struct pts_pos *pp = ptspos;
694 fseeko(stream->file_handle, 0, SEEK_END);
695 uint64_t fsize = ftello(stream->file_handle);
696 uint64_t fincr = fsize / NDURSAMPLES;
697 uint64_t fpos = fincr / 2;
698 for ( i = NDURSAMPLES; --i >= 0; fpos += fincr )
700 *pp++ = hb_sample_pts(stream, fpos);
702 uint64_t dur = compute_stream_rate( ptspos, pp - ptspos ) * (double)fsize;
703 inTitle->duration = dur;
705 inTitle->hours = dur / 3600;
706 inTitle->minutes = ( dur % 3600 ) / 60;
707 inTitle->seconds = dur % 60;
709 rewind(stream->file_handle);
712 /***********************************************************************
714 ***********************************************************************
716 **********************************************************************/
717 int hb_stream_read( hb_stream_t * src_stream, hb_buffer_t * b )
719 if ( src_stream->stream_type == hb_stream_type_program )
721 size_t amt_read = fread(b->data, HB_DVD_READ_BUFFER_SIZE, 1,
722 src_stream->file_handle);
723 return (amt_read > 0);
725 return hb_ts_stream_decode( src_stream, b->data );
728 /***********************************************************************
730 ***********************************************************************
732 **********************************************************************/
733 int hb_stream_seek( hb_stream_t * src_stream, float f )
735 off_t stream_size, cur_pos, new_pos;
736 double pos_ratio = f;
737 cur_pos = ftello(src_stream->file_handle);
738 fseeko(src_stream->file_handle,0 ,SEEK_END);
739 stream_size = ftello(src_stream->file_handle);
740 new_pos = (off_t) ((double) (stream_size) * pos_ratio);
741 new_pos &=~ (HB_DVD_READ_BUFFER_SIZE - 1);
742 int r = fseeko(src_stream->file_handle, new_pos, SEEK_SET);
746 fseeko(src_stream->file_handle, cur_pos, SEEK_SET);
750 if (src_stream->stream_type == hb_stream_type_transport)
752 // We need to drop the current decoder output and move
753 // forwards to the next transport stream packet.
754 hb_ts_stream_reset(src_stream);
760 static void set_audio_description( hb_audio_t *audio, iso639_lang_t *lang )
763 * This is a duplicate of code in dvd.c - it should get factored out
764 * into a common routine. We probably should only be putting the lang
765 * code or a lang pointer into the audio config & let the common description
766 * formatting routine in scan.c do all the stuff below.
768 snprintf( audio->config.lang.description,
769 sizeof( audio->config.lang.description ), "%s (%s)",
770 strlen(lang->native_name) ? lang->native_name : lang->eng_name,
771 audio->config.in.codec == HB_ACODEC_AC3 ? "AC3" :
772 audio->config.in.codec == HB_ACODEC_DCA ? "DTS" :
773 audio->config.in.codec == HB_ACODEC_MPGA ? "MPEG" : "LPCM" );
774 snprintf( audio->config.lang.simple, sizeof( audio->config.lang.simple ), "%s",
775 strlen(lang->native_name) ? lang->native_name : lang->eng_name );
776 snprintf( audio->config.lang.iso639_2, sizeof( audio->config.lang.iso639_2 ),
777 "%s", lang->iso639_2);
780 static hb_audio_t *hb_ts_stream_set_audio_id_and_codec(hb_stream_t *stream,
783 off_t cur_pos = ftello(stream->file_handle);
784 hb_audio_t *audio = calloc( sizeof( hb_audio_t ), 1 );
787 fseeko(stream->file_handle, 0, SEEK_SET);
788 align_to_next_packet(stream->file_handle);
789 buf = hb_ts_stream_getPEStype(stream, stream->ts_audio_pids[aud_pid_index]);
791 /* check that we found a PES header */
792 if (buf && buf[0] == 0x00 && buf[1] == 0x00 && buf[2] == 0x01)
796 audio->id = 0x80bd | (aud_pid_index << 8);
797 audio->config.in.codec = HB_ACODEC_AC3;
798 hb_log("transport stream pid 0x%x (type 0x%x) is AC-3 audio id 0x%x",
799 stream->ts_audio_pids[aud_pid_index],
800 stream->ts_audio_stream_type[1 + aud_pid_index],
802 stream->ts_audio_stream_type[1 + aud_pid_index] = 0x81;
803 stream->ts_streamid[1 + aud_pid_index] = buf[3];
805 else if ((buf[3] & 0xe0) == 0xc0)
807 audio->id = buf[3] | aud_pid_index;
808 audio->config.in.codec = HB_ACODEC_MPGA;
809 hb_log("transport stream pid 0x%x (type 0x%x) is MPEG audio id 0x%x",
810 stream->ts_audio_pids[aud_pid_index],
811 stream->ts_audio_stream_type[1 + aud_pid_index],
813 stream->ts_audio_stream_type[1 + aud_pid_index] = 0x03;
814 stream->ts_streamid[1 + aud_pid_index] = buf[3];
817 fseeko(stream->file_handle, cur_pos, SEEK_SET);
818 if ( audio->config.in.codec )
820 set_audio_description( audio,
821 lang_for_code( stream->a52_info[aud_pid_index].lang_code ) );
825 hb_log("transport stream pid 0x%x (type 0x%x) isn't audio",
826 stream->ts_audio_pids[aud_pid_index],
827 stream->ts_audio_stream_type[1 + aud_pid_index]);
832 static void add_audio_to_title(hb_title_t *title, int id)
834 hb_audio_t *audio = calloc( sizeof( hb_audio_t ), 1 );
840 audio->config.in.codec = HB_ACODEC_MPGA;
841 hb_log("add_audio_to_title: added MPEG audio stream 0x%x", id);
844 // type 2 is a DVD subtitle stream - just ignore it */
848 audio->config.in.codec = HB_ACODEC_AC3;
849 hb_log("add_audio_to_title: added AC3 audio stream 0x%x", id);
852 audio->config.in.codec = HB_ACODEC_LPCM;
853 hb_log("add_audio_to_title: added LPCM audio stream 0x%x", id);
856 hb_log("add_audio_to_title: unknown audio stream type 0x%x", id);
861 set_audio_description( audio, lang_for_code( 0 ) );
862 hb_list_add( title->list_audio, audio );
865 static void hb_ps_stream_find_audio_ids(hb_stream_t *stream, hb_title_t *title)
867 off_t cur_pos = ftello(stream->file_handle);
868 hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
869 hb_list_t *list = hb_list_init();
870 // how many blocks we read while searching for audio streams
872 // there can be at most 16 unique streams in an MPEG PS (8 in a DVD)
873 // so we use a bitmap to keep track of the ones we've already seen.
874 // Bit 'i' of smap is set if we've already added the audio for
875 // audio substream id 'i' to the title's audio list.
878 // start looking 20% into the file since there's occasionally no
879 // audio at the beginning (particularly for vobs).
880 hb_stream_seek(stream, 0.2f);
882 while (--blksleft >= 0 && hb_stream_read(stream, buf) == 1)
886 // 'buf' contains an MPEG2 PACK - get a list of all it's elementary streams
887 hb_demux_ps(buf, list);
889 while ( ( es = hb_list_item( list, 0 ) ) )
891 hb_list_rem( list, es );
892 if ( (es->id & 0xff) == 0xbd || (es->id & 0xe0) == 0xc0 )
894 // this PES contains some kind of audio - get the substream id
895 // and check if we've seen it already.
896 int ssid = (es->id > 0xff ? es->id >> 8 : es->id) & 0xf;
897 if ( (smap & (1 << ssid)) == 0 )
899 // we haven't seen this stream before - add it to the
900 // title's list of audio streams.
902 add_audio_to_title(title, es->id);
905 hb_buffer_close( &es );
908 hb_list_empty( &list );
909 hb_buffer_close(&buf);
910 fseeko(stream->file_handle, cur_pos, SEEK_SET);
913 /***********************************************************************
915 ***********************************************************************
917 **********************************************************************/
919 static void hb_ts_stream_init(hb_stream_t *stream)
923 for (i=0; i < kMaxNumberDecodeStreams; i++)
925 stream->ts_streamcont[i] = -1;
927 stream->ts_video_pids[0] = -1;
928 for ( i = 0; i < stream->ts_number_audio_pids; i++ )
930 stream-> ts_audio_pids[i] = -1;
933 // Find the audio and video pids in the stream
934 hb_ts_stream_find_pids(stream);
936 stream->ts_streamid[0] = 0xE0; // stream 0 must be video
938 for (i = 0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
940 // demuxing buffer for TS to PS conversion
941 stream->ts_buf[i] = malloc( HB_DVD_READ_BUFFER_SIZE );
945 // ------------------------------------------------------------------------------------
947 static off_t align_to_next_packet(FILE* f)
949 unsigned char buf[188*20];
951 off_t start = ftello(f);
954 if (fread(buf, 188*20, 1, f) == 1)
957 while (!found && (pos < 188))
961 for (i = 0; i < 188*20; i += 188)
963 unsigned char c = buf[pos+i];
965 if ((c != 0x47) && (c != 0x72) && (c != 0x29))
967 // this offset failed, try next
977 pos = 0; // failed to find anything!!!!!?
979 fseeko(f, start+pos, SEEK_SET);
991 static const unsigned int bitmask[] = {
992 0x0,0x1,0x3,0x7,0xf,0x1f,0x3f,0x7f,0xff,
993 0x1ff,0x3ff,0x7ff,0xfff,0x1fff,0x3fff,0x7fff,0xffff,
994 0x1ffff,0x3ffff,0x7ffff,0xfffff,0x1fffff,0x3fffff,0x7fffff,0xffffff,
995 0x1ffffff,0x3ffffff,0x7ffffff,0xfffffff,0x1fffffff,0x3fffffff,0x7fffffff,0xffffffff};
997 static inline void set_buf(bitbuf_t *bb, uint8_t* buf, int bufsize, int clear)
1001 bb->val = (bb->buf[0] << 24) | (bb->buf[1] << 16) |
1002 (bb->buf[2] << 8) | bb->buf[3];
1004 memset(bb->buf, 0, bufsize);
1007 static inline int buf_size(bitbuf_t *bb)
1009 return bb->pos >> 3;
1012 static inline unsigned int get_bits(bitbuf_t *bb, int bits)
1015 int left = 32 - (bb->pos & 31);
1019 val = (bb->val >> (left - bits)) & bitmask[bits];
1024 val = (bb->val & bitmask[left]) << (bits - left);
1028 int pos = bb->pos >> 3;
1029 bb->val = (bb->buf[pos] << 24) | (bb->buf[pos + 1] << 16) | (bb->buf[pos + 2] << 8) | bb->buf[pos + 3];
1033 val |= (bb->val >> (32 - bits)) & bitmask[bits];
1041 // extract what useful information we can from the elementary stream
1042 // descriptor list at 'dp' and add it to the stream at 'esindx'.
1043 // Descriptors with info we don't currently use are ignored.
1044 // The descriptor list & descriptor item formats are defined in
1045 // ISO 13818-1 (2000E) section 2.6 (pg. 62).
1046 static void decode_element_descriptors(hb_stream_t* stream, int esindx,
1047 const uint8_t *dp, uint8_t dlen)
1049 const uint8_t *ep = dp + dlen;
1055 case 10: // ISO_639_language descriptor
1056 stream->a52_info[esindx].lang_code = lang_to_code(lang_for_code2((const char *)&dp[2]));
1067 * Get the name of the stream from the type - thanks to VLC for this.
1069 static const char *get_stream_name (unsigned char stream_type)
1071 switch( stream_type )
1073 case 0x01: /* MPEG-1 video */
1074 case 0x02: /* MPEG-2 video */
1075 case 0x80: /* MPEG-2 MOTO video */
1076 return("MPEG 1/2 Video");
1078 case 0x03: /* MPEG-1 audio */
1079 case 0x04: /* MPEG-2 audio */
1080 return("MPEG Audio");
1082 case 0x11: /* MPEG4 (audio) */
1083 case 0x0f: /* ISO/IEC 13818-7 Audio with ADTS transport syntax */
1084 return("MPEG-4 Audio");
1086 case 0x10: /* MPEG4 (video) */
1087 return("MPEG-4 Video");
1089 case 0x1B: /* H264 <- check transport syntax/needed descriptor */
1090 return("H.264 Video");
1093 case 0x81: /* A52 (audio) */
1094 return("A52/AC-3 Audio");
1096 case 0x82: /* DVD_SPU (sub) */
1099 case 0x83: /* LPCM (audio) */
1100 return("LPCM Audio");
1102 case 0x84: /* SDDS (audio) */
1103 return("SDDS Audio");
1105 case 0x85: /* DTS (audio) */
1106 return("DTS Audio");
1109 case 0x91: /* A52 vls (audio) */
1110 return("A52b/AC-3 Audio");
1112 case 0x92: /* DVD_SPU vls (sub) */
1116 case 0x94: /* SDDS (audio) */
1117 return("SDDS Audio");
1120 case 0xa0: /* MSCODEC vlc (video) (fixed later) */
1121 return("MSCODEC Video");
1124 case 0x06: /* PES_PRIVATE (fixed later) */
1125 case 0x12: /* MPEG-4 generic (sub/scene/...) (fixed later) */
1126 case 0xEA: /* Privately managed ES (VC-1) (fixed later */
1133 int decode_program_map(hb_stream_t* stream)
1136 set_buf(&bb, stream->pmt_info.tablebuf, stream->pmt_info.tablepos, 0);
1138 get_bits(&bb, 8); // table_id
1140 unsigned int section_length = get_bits(&bb, 12);
1141 stream->pmt_info.section_length = section_length;
1143 unsigned int program_number = get_bits(&bb, 16);
1144 stream->pmt_info.program_number = program_number;
1146 get_bits(&bb, 5); // version_number
1148 get_bits(&bb, 8); // section_number
1149 get_bits(&bb, 8); // last_section_number
1151 unsigned int PCR_PID = get_bits(&bb, 13);
1152 stream->pmt_info.PCR_PID = PCR_PID;
1154 unsigned int program_info_length = get_bits(&bb, 12);
1155 stream->pmt_info.program_info_length = program_info_length;
1158 unsigned char *descriptor_buf = (unsigned char *) malloc(program_info_length);
1159 for (i = 0; i < program_info_length; i++)
1161 descriptor_buf[i] = get_bits(&bb, 8);
1164 int cur_pos = 9 /* data after the section length field*/ + program_info_length;
1165 int done_reading_stream_types = 0;
1166 while (!done_reading_stream_types)
1168 unsigned char stream_type = get_bits(&bb, 8);
1170 unsigned int elementary_PID = get_bits(&bb, 13);
1172 unsigned int ES_info_length = get_bits(&bb, 12);
1175 unsigned char *ES_info_buf = (unsigned char *) malloc(ES_info_length);
1176 for (i=0; i < ES_info_length; i++)
1178 ES_info_buf[i] = get_bits(&bb, 8);
1182 if (stream_type == 0x02 || stream_type == 0x10 || stream_type == 0x1B)
1184 /* MPEG-2/MPEG-4/H.264 */
1185 if (stream->ts_number_video_pids <= kMaxNumberVideoPIDS)
1186 stream->ts_number_video_pids++;
1187 stream->ts_video_pids[stream->ts_number_video_pids-1] = elementary_PID;
1188 stream->ts_video_stream_type[stream->ts_number_video_pids-1] = stream_type;
1192 // Defined audio stream types are 0x81 for AC-3/A52 audio and 0x03
1193 // for mpeg audio. But content producers seem to use other
1194 // values (0x04 and 0x06 have both been observed) so at this point
1195 // we say everything that isn't a video pid is audio then at the end
1196 // of hb_stream_title_scan we'll figure out which are really audio
1197 // by looking at the PES headers.
1198 i = stream->ts_number_audio_pids;
1199 if (i < kMaxNumberAudioPIDS)
1200 stream->ts_number_audio_pids++;
1201 stream->ts_audio_pids[i] = elementary_PID;
1202 stream->ts_audio_stream_type[1 + i] = stream_type;
1204 if (ES_info_length > 0)
1206 decode_element_descriptors(stream, i, ES_info_buf, ES_info_length);
1210 cur_pos += 5 /* stream header */ + ES_info_length;
1214 if (cur_pos >= section_length - 4 /* stop before the CRC */)
1215 done_reading_stream_types = 1;
1218 free(descriptor_buf);
1222 // ------------------------------------------------------------------------------------
1224 int build_program_map(unsigned char *buf, hb_stream_t *stream)
1226 // Get adaption header info
1228 int adaption = (buf[3] & 0x30) >> 4;
1231 else if (adaption == 0x2)
1233 else if (adaption == 0x3)
1234 adapt_len = buf[4] + 1;
1235 if (adapt_len > 184)
1238 // Get payload start indicator
1240 start = (buf[1] & 0x40) != 0;
1242 // Get pointer length - only valid in packets with a start flag
1243 int pointer_len = 0;
1244 if (start && stream->pmt_info.reading)
1246 // We just finished a bunch of packets - parse the program map details
1248 if (stream->pmt_info.tablebuf[0] == 0x02)
1249 decode_ok = decode_program_map(stream);
1250 free(stream->pmt_info.tablebuf);
1251 stream->pmt_info.tablebuf = NULL;
1252 stream->pmt_info.tablepos = 0;
1253 stream->pmt_info.reading = 0;
1260 pointer_len = buf[4 + adapt_len] + 1;
1261 stream->pmt_info.tablepos = 0;
1263 // Get Continuity Counter
1264 int continuity_counter = buf[3] & 0x0f;
1265 if (!start && (stream->pmt_info.current_continuity_counter + 1 != continuity_counter))
1267 hb_log("build_program_map - Continuity Counter %d out of sequence - expected %d", continuity_counter, stream->pmt_info.current_continuity_counter+1);
1270 stream->pmt_info.current_continuity_counter = continuity_counter;
1271 stream->pmt_info.reading |= start;
1273 // Add the payload for this packet to the current buffer
1274 int amount_to_copy = 184 - adapt_len - pointer_len;
1275 if (stream->pmt_info.reading && (amount_to_copy > 0))
1277 stream->pmt_info.tablebuf = realloc(stream->pmt_info.tablebuf, stream->pmt_info.tablepos + amount_to_copy);
1279 memcpy(stream->pmt_info.tablebuf + stream->pmt_info.tablepos, buf + 4 + adapt_len + pointer_len, amount_to_copy);
1280 stream->pmt_info.tablepos += amount_to_copy;
1286 int decode_PAT(unsigned char *buf, hb_stream_t *stream)
1288 unsigned char tablebuf[1024];
1289 unsigned int tablepos = 0;
1294 // Get adaption header info
1296 int adaption = (buf[3] & 0x30) >> 4;
1299 else if (adaption == 0x2)
1301 else if (adaption == 0x3)
1302 adapt_len = buf[4] + 1;
1303 if (adapt_len > 184)
1306 // Get pointer length
1307 int pointer_len = buf[4 + adapt_len] + 1;
1309 // Get payload start indicator
1311 start = (buf[1] & 0x40) != 0;
1316 // Add the payload for this packet to the current buffer
1317 if (reading && (184 - adapt_len) > 0)
1319 if (tablepos + 184 - adapt_len - pointer_len > 1024)
1321 hb_log("decode_PAT - Bad program section length (> 1024)");
1324 memcpy(tablebuf + tablepos, buf + 4 + adapt_len + pointer_len, 184 - adapt_len - pointer_len);
1325 tablepos += 184 - adapt_len - pointer_len;
1328 if (start && reading)
1330 memcpy(tablebuf + tablepos, buf + 4 + adapt_len + 1, pointer_len - 1);
1333 unsigned int pos = 0;
1334 //while (pos < tablepos)
1337 set_buf(&bb, tablebuf + pos, tablepos - pos, 0);
1339 unsigned char section_id = get_bits(&bb, 8);
1341 unsigned int section_len = get_bits(&bb, 12);
1342 get_bits(&bb, 16); // transport_id
1344 get_bits(&bb, 5); // version_num
1345 get_bits(&bb, 1); // current_next
1346 get_bits(&bb, 8); // section_num
1347 get_bits(&bb, 8); // last_section
1353 // Program Association Section
1354 section_len -= 5; // Already read transport stream ID, version num, section num, and last section num
1355 section_len -= 4; // Ignore the CRC
1357 stream->ts_number_pat_entries = 0;
1358 while ((curr_pos < section_len) && (stream->ts_number_pat_entries < kMaxNumberPMTStreams))
1360 unsigned int pkt_program_num = get_bits(&bb, 16);
1361 stream->pat_info[stream->ts_number_pat_entries].program_number = pkt_program_num;
1363 get_bits(&bb, 3); // Reserved
1364 if (pkt_program_num == 0)
1366 get_bits(&bb, 13); // pkt_network_id
1370 unsigned int pkt_program_map_PID = get_bits(&bb, 13);
1371 stream->pat_info[stream->ts_number_pat_entries].program_map_PID = pkt_program_map_PID;
1374 stream->ts_number_pat_entries++;
1388 pos += 3 + section_len;
1396 static void hb_ts_stream_find_pids(hb_stream_t *stream)
1398 unsigned char buf[188];
1400 // align to first packet
1401 align_to_next_packet(stream->file_handle);
1403 // Read the Transport Stream Packets (188 bytes each) looking at first for PID 0 (the PAT PID), then decode that
1404 // to find the program map PID and then decode that to get the list of audio and video PIDs
1406 int bytesReadInPacket = 0;
1409 // Try to read packet..
1411 if ((bytesRead = fread(buf+bytesReadInPacket, 1, 188-bytesReadInPacket, stream->file_handle)) != 188-bytesReadInPacket)
1415 bytesReadInPacket += bytesRead;
1417 hb_log("hb_ts_stream_find_pids - end of file");
1422 bytesReadInPacket = 0;
1426 if ((buf[0] != 0x47) && (buf[0] != 0x72) && (buf[0] != 0x29))
1428 off_t pos = ftello(stream->file_handle) - 188;
1429 off_t pos2 = align_to_next_packet(stream->file_handle);
1432 hb_log( "hb_ts_stream_find_pids: eof while re-establishing sync @ %lld",
1436 hb_log("hb_ts_stream_decode: sync lost @%lld, regained after %lld bytes",
1442 int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
1444 if ((pid == 0x0000) && (stream->ts_number_pat_entries == 0))
1446 decode_PAT(buf, stream);
1451 for (pat_index = 0; pat_index < stream->ts_number_pat_entries; pat_index++)
1453 // There are some streams where the PAT table has multiple entries as if their are
1454 // multiple programs in the same transport stream, and yet there's actually only one
1455 // program really in the stream. This seems to be true for transport streams that
1456 // originate in the HDHomeRun but have been output by EyeTV's export utility. What I think
1457 // is happening is that the HDHomeRun is sending the entire transport stream as broadcast,
1458 // but the EyeTV is only recording a single (selected) program number and not rewriting the
1459 // PAT info on export to match what's actually on the stream.
1460 // Until we have a way of handling multiple programs per transport stream elegantly we'll match
1461 // on the first pat entry for which we find a matching program map PID. The ideal solution would
1462 // be to build a title choice popup from the PAT program number details and then select from
1463 // their - but right now the API's not capable of that.
1464 if (pid == stream->pat_info[pat_index].program_map_PID)
1466 if (build_program_map(buf, stream) > 0)
1470 // Keep going until we have a complete set of PIDs
1471 if ((stream->ts_number_video_pids > 0) && (stream->ts_number_audio_pids > 0))
1475 hb_log("hb_ts_stream_find_pids - found the following PIDS");
1476 hb_log(" Video PIDS : ");
1478 for (i=0; i < stream->ts_number_video_pids; i++)
1480 hb_log(" 0x%x (%d) [Type %s (0x%x)]",
1481 stream->ts_video_pids[i], stream->ts_video_pids[i],
1482 get_stream_name(stream->ts_video_stream_type[i]),
1483 stream->ts_video_stream_type[i]);
1485 hb_log(" Audio PIDS : ");
1486 for (i = 0; i < stream->ts_number_audio_pids; i++)
1488 hb_log(" 0x%x (%d) [Type %s (0x%x)]",
1489 stream->ts_audio_pids[i], stream->ts_audio_pids[i],
1490 get_stream_name(stream->ts_audio_stream_type[i]),
1491 stream->ts_audio_stream_type[i] );
1496 static void fwrite64( hb_stream_t *stream, void *buf, int size )
1498 if ( (stream->fwrite_buf - stream->fwrite_buf_orig) + size > 2048 )
1500 hb_log( "steam fwrite64 buffer overflow - writing %d with %d already",
1501 size, stream->fwrite_buf - stream->fwrite_buf_orig );
1504 memcpy( stream->fwrite_buf, buf, size );
1505 stream->fwrite_buf += size;
1508 static void write_pack(hb_stream_t* stream, uint64_t time, int stuffing)
1512 buf[0] = 0x00; // pack id
1517 buf[4] = 0x44 | // SCR
1518 ( ( ( time >> 30 ) & 7 ) << 3 ) |
1519 ( ( time >> 28 ) & 3 );
1520 buf[5] = time >> 20;
1522 ( ( ( time >> 15 ) & 0x1f ) << 3 ) |
1523 ( ( time >> 13 ) & 3 );
1525 buf[8] = 0x04 | ( time << 3 );
1527 buf[9] = 0x01; // SCR extension
1529 buf[10] = 384000 >> (22 - 8); // program mux rate
1530 buf[11] = (uint8_t)( 384000 >> (22 - 16) );
1531 buf[12] = (uint8_t)( 384000 << 2 ) | 0x03;
1533 buf[13] = 0xf8 | stuffing;
1536 for (i = 0; i < stuffing; ++i )
1539 fwrite64(stream, buf, 14 + stuffing );
1542 static void pad_buffer(hb_stream_t* stream, int pad)
1554 fwrite64(stream, buf, 6);
1557 while ( --pad >= 0 )
1559 fwrite64(stream, buf, 1);
1563 static void make_pes_header(hb_stream_t* stream, int len, uint8_t streamid)
1567 memset(buf, 0, sizeof(buf) );
1570 buf[4] = ( len + 3 ) >> 8;
1574 fwrite64(stream, buf, 9);
1577 static void generate_output_data(hb_stream_t *stream, int curstream)
1579 uint8_t *tdat = stream->ts_buf[curstream];
1582 // we always ship a PACK header plus all the data in our demux buf.
1583 // AC3 audio also always needs it substream header.
1584 len = 14 + stream->ts_pos[curstream];
1585 if ( stream->ts_audio_stream_type[curstream] == 0x81)
1590 if ( ! stream->ts_start[curstream] )
1592 // we're in the middle of a chunk of PES data - we need to add
1593 // a 'continuation' PES header after the PACK header.
1597 // Write out pack header
1598 // If we don't have 2048 bytes we need to pad to 2048. We can
1599 // add a padding frame after our data but we need at least 7
1600 // bytes of space to do it (6 bytes of header & 1 of pad). If
1601 // we have fewer than 7 bytes left we need to fill the excess
1602 // space with stuffing bytes added to the pack header.
1604 if ( len > HB_DVD_READ_BUFFER_SIZE )
1606 hb_log( "stream ts length botch %d", len );
1608 if ( HB_DVD_READ_BUFFER_SIZE - len < 8)
1610 stuffing = HB_DVD_READ_BUFFER_SIZE - len;
1612 write_pack(stream, stream->ts_nextpcr, stuffing );
1613 stream->ts_nextpcr += 10;
1615 if ( stream->ts_start[curstream] )
1617 // Start frames already have a PES header but we have modify it
1618 // to map from TS PID to PS stream id. Also, if the stream is AC3
1619 // audio we have to insert an AC3 stream header between the end of
1620 // the PES header and the start of the stream data.
1622 stream->ts_start[curstream] = 0;
1623 tdat[3] = stream->ts_streamid[curstream];
1625 uint16_t plen = stream->ts_pos[curstream] - 6;
1626 if ( stream->ts_audio_stream_type[curstream] == 0x81)
1628 // We have to add an AC3 header in front of the data. Add its
1629 // size to the PES packet length.
1631 tdat[4] = plen >> 8;
1634 // Write out the PES header
1635 int hdrsize = 9 + tdat[8];
1636 fwrite64(stream, tdat, hdrsize);
1638 // add a four byte DVD ac3 stream header
1639 uint8_t ac3_substream_id[4];
1640 int ssid = (curstream - stream->ts_number_video_pids) & 0xf;
1641 ac3_substream_id[0] = 0x80 | ssid; // substream id
1642 ac3_substream_id[1] = 0x01; // number of sync words
1643 ac3_substream_id[2] = 0x00; // first offset (16 bits)
1644 ac3_substream_id[3] = 0x02;
1645 fwrite64(stream, ac3_substream_id, 4);
1647 // add the rest of the data
1648 fwrite64(stream, tdat + hdrsize, stream->ts_pos[curstream] - hdrsize);
1652 // not audio - don't need to modify the stream so write what we've got
1653 tdat[4] = plen >> 8;
1655 fwrite64( stream, tdat, stream->ts_pos[curstream] );
1660 // data without a PES start header needs a simple 'continuation'
1661 // PES header. AC3 audio also needs its substream header.
1662 if ( stream->ts_audio_stream_type[curstream] != 0x81)
1664 make_pes_header(stream, stream->ts_pos[curstream],
1665 stream->ts_streamid[curstream]);
1669 make_pes_header(stream, stream->ts_pos[curstream] + 4,
1670 stream->ts_streamid[curstream]);
1672 // add a four byte DVD ac3 stream header
1673 uint8_t ac3_substream_id[4];
1674 int ssid = (curstream - stream->ts_number_video_pids) & 0xf;
1675 ac3_substream_id[0] = 0x80 | ssid; // substream id
1676 ac3_substream_id[1] = 0x01; // number of sync words
1677 ac3_substream_id[2] = 0x00; // first offset (16 bits)
1678 ac3_substream_id[3] = 0x02;
1679 fwrite64(stream, ac3_substream_id, 4);
1681 fwrite64( stream, tdat, stream->ts_pos[curstream] );
1685 int left = HB_DVD_READ_BUFFER_SIZE - len;
1688 pad_buffer(stream, left);
1691 stream->ts_pos[curstream] = 0;
1694 static void ts_warn_helper( hb_stream_t *stream, char *log, va_list args )
1696 // limit error printing to at most one per minute of video (at 30fps)
1698 if ( stream->frames - stream->last_error_frame >= 30*60 )
1702 vsnprintf( msg, sizeof(msg), log, args );
1704 if ( stream->errors - stream->last_error_count < 10 )
1706 hb_log( "stream: error near frame %d: %s", stream->frames, msg );
1710 int Edelta = stream->errors - stream->last_error_count;
1711 double Epcnt = (double)Edelta * 100. /
1712 (stream->frames - stream->last_error_frame);
1713 hb_log( "stream: %d new errors (%.0f%%) up to frame %d: %s",
1714 Edelta, Epcnt, stream->frames, msg );
1716 stream->last_error_frame = stream->frames;
1717 stream->last_error_count = stream->errors;
1721 static void ts_warn( hb_stream_t *stream, char *log, ... )
1724 va_start( args, log );
1725 ts_warn_helper( stream, log, args );
1729 static void ts_err( hb_stream_t *stream, int curstream, char *log, ... )
1732 va_start( args, log );
1733 ts_warn_helper( stream, log, args );
1736 stream->ts_skipbad[curstream] = 1;
1737 stream->ts_pos[curstream] = 0;
1738 stream->ts_streamcont[curstream] = -1;
1741 static int isIframe( const uint8_t *buf, int adapt_len )
1743 // Look for the Group of Pictures packet
1747 for (i = 4 + adapt_len; i < 188; i++)
1749 strid = (strid << 8) | buf[i];
1752 case 0x000001B8: // group_start_code (GOP header)
1753 case 0x000001B3: // sequence_header code
1756 case 0x00000100: // picture_start_code
1757 // picture_header, let's see if it's an I-frame
1760 // check if picture_coding_type == 1
1761 if ((buf[i+2] & (0x7 << 3)) == (1 << 3))
1763 // found an I-frame picture
1770 // didn't find an I frame
1774 /***********************************************************************
1775 * hb_ts_stream_decode
1776 ***********************************************************************
1778 **********************************************************************/
1779 static int hb_ts_stream_decode( hb_stream_t *stream, uint8_t *obuf )
1781 int64_t pcr = stream->ts_lastpcr;
1786 * stash the output buffer pointer in our stream so we don't have to
1787 * pass it & its original value to everything we call.
1789 stream->fwrite_buf = obuf;
1790 stream->fwrite_buf_orig = obuf;
1792 // spin until we get a packet of data from some stream or hit eof
1795 if ((fread(buf, 188, 1, stream->file_handle)) != 1)
1797 // end of file - we didn't finish filling our ps write buffer
1798 // so just discard the remainder (the partial buffer is useless)
1799 hb_log("hb_ts_stream_decode - eof");
1803 /* This next section validates the packet */
1806 if ((buf[0] != 0x47) && (buf[0] != 0x72) && (buf[0] != 0x29))
1808 // lost sync - back up to where we started then try to
1809 // re-establish sync.
1810 off_t pos = ftello(stream->file_handle) - 188;
1811 off_t pos2 = align_to_next_packet(stream->file_handle);
1814 hb_log( "hb_ts_stream_decode: eof while re-establishing sync @ %lld",
1818 ts_warn( stream, "hb_ts_stream_decode: sync lost @%lld, "
1819 "regained after %lld bytes", pos, pos2 );
1823 // Get pid and use it to find stream state.
1824 int pid = ((buf[1] & 0x1F) << 8) | buf[2];
1825 if ( ( curstream = index_of_pid( pid, stream ) ) < 0 )
1829 int errorbit = (buf[1] & 0x80) != 0;
1832 ts_err( stream, curstream, "packet error bit set");
1836 // Get adaption header info
1837 int adaption = (buf[3] & 0x30) >> 4;
1841 ts_err( stream, curstream, "adaptation code 0");
1844 else if (adaption == 0x2)
1846 else if (adaption == 0x3)
1848 adapt_len = buf[4] + 1;
1849 if (adapt_len > 184)
1851 ts_err( stream, curstream, "invalid adapt len %d", adapt_len);
1856 // if there's an adaptation header & PCR_flag is set
1857 // get the PCR (Program Clock Reference)
1858 if ( adapt_len > 7 && ( buf[5] & 0x10 ) != 0 )
1860 pcr = ( (uint64_t)buf[6] << (33 - 8) ) |
1861 ( (uint64_t)buf[7] << (33 - 16) ) |
1862 ( (uint64_t)buf[8] << (33 - 24) ) |
1863 ( (uint64_t)buf[9] << (33 - 32) ) |
1865 stream->ts_nextpcr = pcr;
1867 // remember the pcr across calls to this routine
1868 stream->ts_lastpcr = pcr;
1873 // don't accumulate data until we get a pcr
1878 // Continuity only increments for adaption values of 0x3 or 0x01
1879 // and is not checked for start packets.
1881 int start = (buf[1] & 0x40) != 0;
1883 if ( (adaption & 0x01) != 0 )
1885 int continuity = (buf[3] & 0xF);
1886 if ( continuity == stream->ts_streamcont[curstream] )
1888 // we got a duplicate packet (usually used to introduce
1889 // a PCR when one is needed). The only thing that can
1890 // change in the dup is the PCR which we grabbed above
1891 // so ignore the rest.
1894 if ( !start && (stream->ts_streamcont[curstream] != -1) &&
1895 (continuity != ( (stream->ts_streamcont[curstream] + 1) & 0xf ) ) )
1897 ts_err( stream, curstream, "continuity error: got %d expected %d",
1899 (stream->ts_streamcont[curstream] + 1) & 0xf );
1900 stream->ts_streamcont[curstream] = continuity;
1903 stream->ts_streamcont[curstream] = continuity;
1906 /* If we get here the packet is valid - process its data */
1910 // Found a random access point (now we can start a frame/audio packet..)
1912 // If we were skipping a bad packet, start fresh on this new PES packet..
1913 if (stream->ts_skipbad[curstream] == 1)
1915 // video skips to an iframe after a bad packet to minimize
1916 // screen corruption
1917 if ( curstream == 0 && !isIframe( buf, adapt_len ) )
1921 stream->ts_skipbad[curstream] = 0;
1924 // If we don't have video yet, check to see if this is an
1925 // i_frame (group of picture start)
1926 if ( curstream == 0 )
1928 if ( !stream->ts_foundfirst[0] )
1930 if ( !isIframe( buf, adapt_len ) )
1932 // didn't find an I frame
1935 stream->ts_foundfirst[0] = 1;
1939 else if ( ! stream->ts_foundfirst[curstream] )
1941 // start other streams only after first video frame found.
1942 if ( ! stream->ts_foundfirst[0] )
1946 stream->ts_foundfirst[curstream] = 1;
1949 // If we have some data already on this stream, turn it into
1950 // a program stream packet. Then add the payload for this
1951 // packet to the current pid's buffer.
1952 if ( stream->ts_pos[curstream] )
1954 generate_output_data(stream, curstream);
1955 stream->ts_start[curstream] = 1;
1956 memcpy(stream->ts_buf[curstream],
1957 buf + 4 + adapt_len, 184 - adapt_len);
1958 stream->ts_pos[curstream] = 184 - adapt_len;
1961 stream->ts_start[curstream] = 1;
1964 // Add the payload for this packet to the current buffer
1965 if (!stream->ts_skipbad[curstream] && stream->ts_foundfirst[curstream] &&
1966 (184 - adapt_len) > 0)
1968 memcpy(stream->ts_buf[curstream] + stream->ts_pos[curstream],
1969 buf + 4 + adapt_len, 184 - adapt_len);
1970 stream->ts_pos[curstream] += 184 - adapt_len;
1972 // if the next TS packet could possibly overflow our 2K output buffer
1973 // we need to generate a packet now. Overflow would be 184 bytes of
1974 // data + the 9 byte PES hdr + the 14 byte PACK hdr = 211 bytes.
1975 if ( stream->ts_pos[curstream] >= (HB_DVD_READ_BUFFER_SIZE - 216) )
1977 // we have enough data to make a PS packet
1978 generate_output_data(stream, curstream);
1985 /***********************************************************************
1986 * hb_ts_stream_reset
1987 ***********************************************************************
1989 **********************************************************************/
1990 static void hb_ts_stream_reset(hb_stream_t *stream)
1994 for (i=0; i < kMaxNumberDecodeStreams; i++)
1996 stream->ts_pos[i] = 0;
1997 stream->ts_foundfirst[i] = 0;
1998 stream->ts_skipbad[i] = 0;
1999 stream->ts_streamcont[i] = -1;
2000 stream->ts_start[i] = 0;
2003 stream->ts_lastpcr = -1;
2004 stream->ts_nextpcr = -1;
2008 stream->last_error_frame = -10000;
2009 stream->last_error_count = 0;
2011 align_to_next_packet(stream->file_handle);