1 /* $Id: muxmp4.c,v 1.24 2005/11/04 13:09:41 titer Exp $
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. */
7 #include "mp4v2/mp4v2.h"
8 #include "a52dec/a52.h"
12 void AddIPodUUID(MP4FileHandle, MP4TrackId);
14 struct hb_mux_object_s
23 /* Cumulated durations so far, in output & input timescale units (see MP4Mux) */
24 int64_t sum_dur; // duration in output timescale units
25 int64_t sum_dur_in; // duration in input 90KHz timescale units
27 // bias to keep render offsets in ctts atom positive (set up by encx264)
30 /* Chapter state information for muxing */
31 MP4TrackId chapter_track;
33 uint64_t chapter_duration;
35 /* Sample rate of the first audio track.
36 * Used for the timescale
47 /**********************************************************************
49 **********************************************************************
50 * Allocates hb_mux_data_t structures, create file and write headers
51 *********************************************************************/
52 static int MP4Init( hb_mux_object_t * m )
54 hb_job_t * job = m->job;
55 hb_title_t * title = job->title;
58 hb_mux_data_t * mux_data;
60 uint16_t language_code;
62 /* Flags for enabling/disabling tracks in an MP4. */
63 typedef enum { TRACK_DISABLED = 0x0, TRACK_ENABLED = 0x1, TRACK_IN_MOVIE = 0x2, TRACK_IN_PREVIEW = 0x4, TRACK_IN_POSTER = 0x8} track_header_flags;
65 if( (audio = hb_list_item(title->list_audio, 0)) != NULL )
67 /* Need the sample rate of the first audio track to use as the timescale. */
68 m->samplerate = audio->config.out.samplerate;
73 m->samplerate = 90000;
76 /* Create an empty mp4 file */
77 if (job->largeFileSize)
78 /* Use 64-bit MP4 file */
80 m->file = MP4Create( job->file, MP4_DETAILS_ERROR, MP4_CREATE_64BIT_DATA );
81 hb_deep_log( 2, "muxmp4: using 64-bit MP4 formatting.");
84 /* Limit MP4s to less than 4 GB */
86 m->file = MP4Create( job->file, MP4_DETAILS_ERROR, 0 );
89 if (m->file == MP4_INVALID_FILE_HANDLE)
91 hb_error("muxmp4.c: MP4Create failed!");
97 mux_data = malloc( sizeof( hb_mux_data_t ) );
98 job->mux_data = mux_data;
100 /* When using the standard 90000 timescale, QuickTime tends to have
101 synchronization issues (audio not playing at the correct speed).
102 To workaround this, we use the audio samplerate as the
104 if (!(MP4SetTimeScale( m->file, m->samplerate )))
106 hb_error("muxmp4.c: MP4SetTimeScale failed!");
111 if( job->vcodec == HB_VCODEC_X264 )
113 /* Stolen from mp4creator */
114 MP4SetVideoProfileLevel( m->file, 0x7F );
115 mux_data->track = MP4AddH264VideoTrack( m->file, m->samplerate,
116 MP4_INVALID_DURATION, job->width, job->height,
117 job->config.h264.sps[1], /* AVCProfileIndication */
118 job->config.h264.sps[2], /* profile_compat */
119 job->config.h264.sps[3], /* AVCLevelIndication */
120 3 ); /* 4 bytes length before each NAL unit */
123 MP4AddH264SequenceParameterSet( m->file, mux_data->track,
124 job->config.h264.sps, job->config.h264.sps_length );
125 MP4AddH264PictureParameterSet( m->file, mux_data->track,
126 job->config.h264.pps, job->config.h264.pps_length );
128 if( job->h264_level == 30 || job->ipod_atom)
130 hb_deep_log( 2, "muxmp4: adding iPod atom");
131 MP4AddIPodUUID(m->file, mux_data->track);
134 m->init_delay = job->config.h264.init_delay;
136 else /* FFmpeg or XviD */
138 MP4SetVideoProfileLevel( m->file, MPEG4_SP_L3 );
139 mux_data->track = MP4AddVideoTrack( m->file, m->samplerate,
140 MP4_INVALID_DURATION, job->width, job->height,
141 MP4_MPEG4_VIDEO_TYPE );
142 if (mux_data->track == MP4_INVALID_TRACK_ID)
144 hb_error("muxmp4.c: MP4AddVideoTrack failed!");
150 /* VOL from FFmpeg or XviD */
151 if (!(MP4SetTrackESConfiguration( m->file, mux_data->track,
152 job->config.mpeg4.bytes, job->config.mpeg4.length )))
154 hb_error("muxmp4.c: MP4SetTrackESConfiguration failed!");
160 // COLR atom for color and gamma correction.
162 // http://developer.apple.com/quicktime/icefloe/dispatch019.html#colr
163 // http://forum.doom9.org/showthread.php?t=133982#post1090068
164 // the user can set it from job->color_matrix, otherwise by default
165 // we say anything that's likely to be HD content is ITU BT.709 and
166 // DVD, SD TV & other content is ITU BT.601. We look at the title height
167 // rather than the job height here to get uncropped input dimensions.
168 if( job->color_matrix == 1 )
170 // ITU BT.601 DVD or SD TV content
171 MP4AddColr(m->file, mux_data->track, 6, 1, 6);
173 else if( job->color_matrix == 2 )
175 // ITU BT.709 HD content
176 MP4AddColr(m->file, mux_data->track, 1, 1, 1);
178 else if ( job->title->width >= 1280 || job->title->height >= 720 )
180 // we guess that 720p or above is ITU BT.709 HD content
181 MP4AddColr(m->file, mux_data->track, 1, 1, 1);
185 // ITU BT.601 DVD or SD TV content
186 MP4AddColr(m->file, mux_data->track, 6, 1, 6);
189 if( job->pixel_ratio )
191 /* PASP atom for anamorphic video */
194 width = job->pixel_aspect_width;
196 height = job->pixel_aspect_height;
198 MP4AddPixelAspectRatio(m->file, mux_data->track, (uint32_t)width, (uint32_t)height);
200 MP4SetTrackFloatProperty(m->file, mux_data->track, "tkhd.width", job->width * (width / height));
203 /* add the audio tracks */
204 for( i = 0; i < hb_list_count( title->list_audio ); i++ )
206 static uint8_t reserved2[16] = {
207 0x00, 0x00, 0x00, 0x00,
208 0x00, 0x00, 0x00, 0x00,
209 0x00, 0x02, 0x00, 0x10,
210 0x00, 0x00, 0x00, 0x00,
213 audio = hb_list_item( title->list_audio, i );
214 mux_data = malloc( sizeof( hb_mux_data_t ) );
215 audio->priv.mux_data = mux_data;
217 if( audio->config.out.codec == HB_ACODEC_AC3 )
220 uint8_t bsid = audio->config.in.version;
221 uint8_t bsmod = audio->config.in.mode;
222 uint8_t acmod = audio->config.flags.ac3 & 0x7;
223 uint8_t lfeon = (audio->config.flags.ac3 & A52_LFE) ? 1 : 0;
224 uint8_t bit_rate_code = 0;
227 * Rewrite AC3 information into correct format for dac3 atom
229 switch( audio->config.in.samplerate )
242 * Error value, tells decoder to not decode this audio.
248 switch( audio->config.in.bitrate )
308 hb_error("Unknown AC3 bitrate");
313 mux_data->track = MP4AddAC3AudioTrack(
323 if (audio->config.out.name == NULL) {
324 MP4SetTrackBytesProperty(
325 m->file, mux_data->track,
327 (const uint8_t*)"Surround", strlen("Surround"));
330 MP4SetTrackBytesProperty(
331 m->file, mux_data->track,
333 (const uint8_t*)(audio->config.out.name),
334 strlen(audio->config.out.name));
337 mux_data->track = MP4AddAudioTrack(
339 m->samplerate, 1024, MP4_MPEG4_AUDIO_TYPE );
340 if (audio->config.out.name == NULL) {
341 MP4SetTrackBytesProperty(
342 m->file, mux_data->track,
344 (const uint8_t*)"Stereo", strlen("Stereo"));
347 MP4SetTrackBytesProperty(
348 m->file, mux_data->track,
350 (const uint8_t*)(audio->config.out.name),
351 strlen(audio->config.out.name));
354 MP4SetAudioProfileLevel( m->file, 0x0F );
355 MP4SetTrackESConfiguration(
356 m->file, mux_data->track,
357 audio->priv.config.aac.bytes, audio->priv.config.aac.length );
359 /* Set the correct number of channels for this track */
360 MP4SetTrackIntegerProperty(m->file, mux_data->track, "mdia.minf.stbl.stsd.mp4a.channels", (uint16_t)HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(audio->config.out.mixdown));
363 /* Set the language for this track */
364 MP4SetTrackLanguage(m->file, mux_data->track, audio->config.lang.iso639_2);
366 if( hb_list_count( title->list_audio ) > 1 )
368 /* Set the audio track alternate group */
369 MP4SetTrackIntegerProperty(m->file, mux_data->track, "tkhd.alternate_group", 1);
373 /* Enable the first audio track */
374 MP4SetTrackIntegerProperty(m->file, mux_data->track, "tkhd.flags", (TRACK_ENABLED | TRACK_IN_MOVIE));
377 /* Disable the other audio tracks so QuickTime doesn't play
380 MP4SetTrackIntegerProperty(m->file, mux_data->track, "tkhd.flags", (TRACK_DISABLED | TRACK_IN_MOVIE));
381 hb_deep_log( 2, "muxp4: disabled extra audio track %i", mux_data->track-1);
386 if (job->chapter_markers)
388 /* add a text track for the chapters. We add the 'chap' atom to track
389 one which is usually the video track & should never be disabled.
390 The Quicktime spec says it doesn't matter which media track the
391 chap atom is on but it has to be an enabled track. */
392 MP4TrackId textTrack;
393 textTrack = MP4AddChapterTextTrack(m->file, 1, 0);
395 m->chapter_track = textTrack;
396 m->chapter_duration = 0;
397 m->current_chapter = job->chapter_start;
400 /* Add encoded-by metadata listing version and build date */
402 tool_string = (char *)malloc(80);
403 snprintf( tool_string, 80, "HandBrake %s %i", HB_VERSION, HB_BUILD);
404 MP4SetMetadataTool(m->file, tool_string);
410 static int MP4Mux( hb_mux_object_t * m, hb_mux_data_t * mux_data,
413 hb_job_t * job = m->job;
417 if( mux_data == job->mux_data )
421 // if there are b-frames compute the render offset
422 // (we'll need it for both the video frame & the chapter track)
425 offset = ( buf->start + m->init_delay ) * m->samplerate / 90000 -
429 /* Add the sample before the new frame.
430 It is important that this be calculated prior to the duration
431 of the new video sample, as we want to sync to right after it.
432 (This is because of how durations for text tracks work in QT) */
433 if( job->chapter_markers && buf->new_chap )
435 hb_chapter_t *chapter = NULL;
437 // this chapter is postioned by writing out the previous chapter.
438 // the duration of the previous chapter is the duration up to but
439 // not including the current frame minus the duration of all
440 // chapters up to the previous.
441 duration = m->sum_dur - m->chapter_duration + offset;
444 /* The initial & final chapters can have very short durations
445 * (less than the error in our total duration estimate) so
446 * the duration calc above can result in a negative number.
447 * when this happens give the chapter a short duration (1/3
448 * of an ntsc frame time). */
449 duration = 1000 * m->samplerate / 90000;
452 chapter = hb_list_item( m->job->title->list_chapter,
455 MP4AddChapter( m->file,
458 (chapter != NULL) ? chapter->title : NULL);
460 m->current_chapter = buf->new_chap;
461 m->chapter_duration += duration;
464 // since we're changing the sample rate we need to keep track of
465 // the truncation bias so that the audio and video don't go out
466 // of sync. m->sum_dur_in is the sum of the input durations so far.
467 // m->sum_dur is the sum of the output durations. Their difference
468 // (in output sample rate units) is the accumulated truncation bias.
469 int64_t bias = ( m->sum_dur_in * m->samplerate / 90000 ) - m->sum_dur;
470 int64_t dur_in = buf->stop - buf->start;
471 duration = dur_in * m->samplerate / 90000 + bias;
474 /* We got an illegal mp4/h264 duration. This shouldn't
475 be possible and usually indicates a bug in the upstream code.
476 Complain in the hope that someone will go find the bug but
477 try to fix the error so that the file will still be playable. */
478 hb_log("MP4Mux: illegal duration %lld, bias %lld, start %lld (%lld),"
479 "stop %lld (%lld), sum_dur %lld",
480 duration, bias, buf->start * m->samplerate / 90000, buf->start,
481 buf->stop * m->samplerate / 90000, buf->stop, m->sum_dur );
482 /* we don't know when the next frame starts so we can't pick a
483 valid duration for this one so we pick something "short"
484 (roughly 1/3 of an NTSC frame time) and rely on the bias calc
485 for the next frame to correct things (a duration underestimate
486 just results in a large bias on the next frame). */
487 duration = 1000 * m->samplerate / 90000;
489 m->sum_dur += duration;
490 m->sum_dur_in += dur_in;
495 duration = MP4_INVALID_DURATION;
498 // Here's where the sample actually gets muxed.
499 if( !MP4WriteSample( m->file,
505 ((buf->frametype & HB_FRAME_KEY) != 0) ) )
507 hb_error("Failed to write to output file, disk full?");
514 static int MP4End( hb_mux_object_t * m )
516 hb_job_t * job = m->job;
517 hb_title_t * title = job->title;
519 /* Write our final chapter marker */
520 if( m->job->chapter_markers )
522 hb_chapter_t *chapter = NULL;
523 int64_t duration = m->sum_dur - m->chapter_duration;
524 /* The final chapter can have a very short duration - if it's less
525 * than a second just skip it. */
526 if ( duration >= m->samplerate )
529 chapter = hb_list_item( m->job->title->list_chapter,
530 m->current_chapter - 1 );
532 MP4AddChapter( m->file,
535 (chapter != NULL) ? chapter->title : NULL);
541 // Insert track edit to get A/V back in sync. The edit amount is
543 int64_t edit_amt = m->init_delay * m->samplerate / 90000;
544 MP4AddTrackEdit(m->file, 1, MP4_INVALID_EDIT_ID, edit_amt,
545 MP4GetTrackDuration(m->file, 1), 0);
546 if ( m->job->chapter_markers )
548 // apply same edit to chapter track to keep it in sync with video
549 MP4AddTrackEdit(m->file, m->chapter_track, MP4_INVALID_EDIT_ID,
551 MP4GetTrackDuration(m->file, m->chapter_track), 0);
556 * Write the MP4 iTunes metadata if we have any metadata
558 if( title->metadata )
560 hb_metadata_t *md = title->metadata;
562 hb_deep_log( 2, "Writing Metadata to output file...");
564 MP4SetMetadataName( m->file, md->name );
565 MP4SetMetadataArtist( m->file, md->artist );
566 MP4SetMetadataComposer( m->file, md->composer );
567 MP4SetMetadataComment( m->file, md->comment );
568 MP4SetMetadataReleaseDate( m->file, md->release_date );
569 MP4SetMetadataAlbum( m->file, md->album );
570 MP4SetMetadataGenre( m->file, md->genre );
573 MP4SetMetadataCoverArt( m->file, md->coverart, md->coverart_size);
579 if ( job->mp4_optimize )
581 hb_log( "muxmp4: optimizing file" );
582 char filename[1024]; memset( filename, 0, 1024 );
583 snprintf( filename, 1024, "%s.tmp", job->file );
584 MP4Optimize( job->file, filename, MP4_DETAILS_ERROR );
586 rename( filename, job->file );
592 hb_mux_object_t * hb_mux_mp4_init( hb_job_t * job )
594 hb_mux_object_t * m = calloc( sizeof( hb_mux_object_t ), 1 );