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.m0k.org/>.
5 It may be used under the terms of the GNU General Public License. */
12 void AddIPodUUID(MP4FileHandle, MP4TrackId);
14 struct hb_mux_object_s
23 /* Cumulated durations so far, in timescale units (see MP4Mux) */
26 /* Chapter state information for muxing */
27 MP4TrackId chapter_track;
29 uint64_t chapter_duration;
37 struct hb_text_sample_s
44 /**********************************************************************
46 **********************************************************************
47 * Creates a buffer for a text track sample
48 *********************************************************************/
49 static struct hb_text_sample_s *MP4CreateTextSample( char *textString, uint64_t duration )
51 struct hb_text_sample_s *sample = NULL;
52 int stringLength = strlen(textString);
55 if( stringLength < 1024 )
57 sample = malloc( sizeof( struct hb_text_sample_s ) );
59 //textLength = (stringLength; // Account for BOM
60 sample->length = stringLength + 2 + 12; // Account for text length code and other marker
61 sample->duration = (MP4Duration)duration;
63 // 2-byte length marker
64 sample->sample[0] = (stringLength >> 8) & 0xff;
65 sample->sample[1] = stringLength & 0xff;
67 strncpy( (char *)&(sample->sample[2]), textString, stringLength );
71 // Modifier Length Marker
72 sample->sample[x] = 0x00;
73 sample->sample[x+1] = 0x00;
74 sample->sample[x+2] = 0x00;
75 sample->sample[x+3] = 0x0C;
78 sample->sample[x+4] = 'e';
79 sample->sample[x+5] = 'n';
80 sample->sample[x+6] = 'c';
81 sample->sample[x+7] = 'd';
84 sample->sample[x+8] = 0x00;
85 sample->sample[x+9] = 0x00;
86 sample->sample[x+10] = (256 >> 8) & 0xff;
87 sample->sample[x+11] = 256 & 0xff;
93 /**********************************************************************
94 * MP4GenerateChapterSample
95 **********************************************************************
96 * Creates a buffer for a text track sample
97 *********************************************************************/
98 static struct hb_text_sample_s *MP4GenerateChapterSample( hb_mux_object_t * m, uint64_t duration )
100 int chapter = m->current_chapter;
101 hb_chapter_t *chapter_data = hb_list_item( m->job->title->list_chapter, chapter - 1 );
102 char tmp_buffer[1024];
103 char *string = tmp_buffer;
105 tmp_buffer[0] = '\0';
107 if( chapter_data != NULL )
109 string = chapter_data->title;
112 if( strlen(string) == 0 || strlen(string) >= 1024 )
114 snprintf( tmp_buffer, 1023, "Chapter %03i", chapter );
118 return MP4CreateTextSample( string, duration );
122 /**********************************************************************
124 **********************************************************************
125 * Allocates hb_mux_data_t structures, create file and write headers
126 *********************************************************************/
127 static int MP4Init( hb_mux_object_t * m )
129 hb_job_t * job = m->job;
130 hb_title_t * title = job->title;
133 hb_mux_data_t * mux_data;
135 u_int16_t language_code;
137 /* Flags for enabling/disabling tracks in an MP4. */
138 typedef enum { TRACK_DISABLED = 0x0, TRACK_ENABLED = 0x1, TRACK_IN_MOVIE = 0x2, TRACK_IN_PREVIEW = 0x4, TRACK_IN_POSTER = 0x8} track_header_flags;
141 /* Create an empty mp4 file */
142 if (job->largeFileSize)
143 /* Use 64-bit MP4 file */
145 m->file = MP4Create( job->file, MP4_DETAILS_ERROR, MP4_CREATE_64BIT_DATA );
146 hb_log("Using 64-bit MP4 formatting.");
149 /* Limit MP4s to less than 4 GB */
151 m->file = MP4Create( job->file, MP4_DETAILS_ERROR, 0 );
154 if (m->file == MP4_INVALID_FILE_HANDLE)
156 hb_error("muxmp4.c: MP4Create failed!");
162 mux_data = malloc( sizeof( hb_mux_data_t ) );
163 job->mux_data = mux_data;
165 /* When using the standard 90000 timescale, QuickTime tends to have
166 synchronization issues (audio not playing at the correct speed).
167 To workaround this, we use the audio samplerate as the
169 if (!(MP4SetTimeScale( m->file, job->arate )))
171 hb_error("muxmp4.c: MP4SetTimeScale failed!");
176 if( job->vcodec == HB_VCODEC_X264 )
178 /* Stolen from mp4creator */
179 if(!(MP4SetVideoProfileLevel( m->file, 0x7F )))
181 hb_error("muxmp4.c: MP4SetVideoProfileLevel failed!");
186 mux_data->track = MP4AddH264VideoTrack( m->file, job->arate,
187 MP4_INVALID_DURATION, job->width, job->height,
188 job->config.h264.sps[1], /* AVCProfileIndication */
189 job->config.h264.sps[2], /* profile_compat */
190 job->config.h264.sps[3], /* AVCLevelIndication */
191 3 ); /* 4 bytes length before each NAL unit */
194 MP4AddH264SequenceParameterSet( m->file, mux_data->track,
195 job->config.h264.sps, job->config.h264.sps_length );
196 MP4AddH264PictureParameterSet( m->file, mux_data->track,
197 job->config.h264.pps, job->config.h264.pps_length );
199 if( job->h264_level == 30 || job->ipod_atom)
201 hb_log("About to add iPod atom");
202 AddIPodUUID(m->file, mux_data->track);
206 else /* FFmpeg or XviD */
208 if(!(MP4SetVideoProfileLevel( m->file, MPEG4_SP_L3 )))
210 hb_error("muxmp4.c: MP4SetVideoProfileLevel failed!");
214 mux_data->track = MP4AddVideoTrack( m->file, job->arate,
215 MP4_INVALID_DURATION, job->width, job->height,
216 MP4_MPEG4_VIDEO_TYPE );
217 if (mux_data->track == MP4_INVALID_TRACK_ID)
219 hb_error("muxmp4.c: MP4AddVideoTrack failed!");
225 /* VOL from FFmpeg or XviD */
226 if (!(MP4SetTrackESConfiguration( m->file, mux_data->track,
227 job->config.mpeg4.bytes, job->config.mpeg4.length )))
229 hb_error("muxmp4.c: MP4SetTrackESConfiguration failed!");
235 /* apply the anamorphic transformation matrix if needed */
237 if( job->pixel_ratio ) {
241 uint32_t *ptr32 = (uint32_t*) (nval + 2);
244 MP4GetBytesProperty(m->file, "moov.trak.tkhd.reserved3", &val, &size);
248 memcpy(nval, val, size);
251 width = job->pixel_aspect_width;
252 height = job->pixel_aspect_height;
254 uint32_t pixelRatioInt;
257 pixelRatioInt = (uint32_t)((width / height) * 0x10000);
259 #ifdef WORDS_BIGENDIAN
260 ptr32[0] = pixelRatioInt;
262 /* we need to switch the endianness, as the file format expects big endian */
263 ptr32[0] = ((pixelRatioInt & 0x000000FF) << 24) + ((pixelRatioInt & 0x0000FF00) << 8) + ((pixelRatioInt & 0x00FF0000) >> 8) + ((pixelRatioInt & 0xFF000000) >> 24);
269 pixelRatioInt = (uint32_t)((height / width) * 0x10000);
270 #ifdef WORDS_BIGENDIAN
271 ptr32[4] = pixelRatioInt;
273 /* we need to switch the endianness, as the file format expects big endian */
274 ptr32[4] = ((pixelRatioInt & 0x000000FF) << 24) + ((pixelRatioInt & 0x0000FF00) << 8) + ((pixelRatioInt & 0x00FF0000) >> 8) + ((pixelRatioInt & 0xFF000000) >> 24);
279 if(!MP4SetBytesProperty(m->file, "moov.trak.tkhd.reserved3", nval, size)) {
280 hb_log("Problem setting transform matrix");
287 /* end of transformation matrix */
289 /* firstAudioTrack will be used to reference the first audio track when we add a chapter track */
290 MP4TrackId firstAudioTrack = 0;
292 /* add the audio tracks */
293 for( i = 0; i < hb_list_count( title->list_audio ); i++ )
295 static u_int8_t reserved2[16] = {
296 0x00, 0x00, 0x00, 0x00,
297 0x00, 0x00, 0x00, 0x00,
298 0x00, 0x02, 0x00, 0x10,
299 0x00, 0x00, 0x00, 0x00,
302 audio = hb_list_item( title->list_audio, i );
303 mux_data = malloc( sizeof( hb_mux_data_t ) );
304 audio->mux_data = mux_data;
306 mux_data->track = MP4AddAudioTrack( m->file,
307 job->arate, 1024, MP4_MPEG4_AUDIO_TYPE );
308 MP4SetAudioProfileLevel( m->file, 0x0F );
309 MP4SetTrackESConfiguration( m->file, mux_data->track,
310 audio->config.aac.bytes, audio->config.aac.length );
312 /* Set the language for this track */
313 /* The language is stored as 5-bit text - 0x60 */
314 language_code = audio->iso639_2[0] - 0x60; language_code <<= 5;
315 language_code |= audio->iso639_2[1] - 0x60; language_code <<= 5;
316 language_code |= audio->iso639_2[2] - 0x60;
317 MP4SetTrackIntegerProperty(m->file, mux_data->track, "mdia.mdhd.language", language_code);
319 /* Set the correct number of channels for this track */
320 reserved2[9] = (u_int8_t)HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(audio->amixdown);
321 MP4SetTrackBytesProperty(m->file, mux_data->track, "mdia.minf.stbl.stsd.mp4a.reserved2", reserved2, sizeof(reserved2));
323 /* If we ever upgrade mpeg4ip, the line above should be replaced with the line below.*/
324 // MP4SetTrackIntegerProperty(m->file, mux_data->track, "mdia.minf.stbl.stsd.mp4a.channels", (u_int16_t)HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(audio->amixdown));
326 /* store a reference to the first audio track,
327 so we can use it to feed the chapter text track's sample rate */
329 firstAudioTrack = mux_data->track;
331 /* Enable the first audio track */
332 MP4SetTrackIntegerProperty(m->file, mux_data->track, "tkhd.flags", (TRACK_ENABLED | TRACK_IN_MOVIE));
336 /* Disable the other audio tracks so QuickTime doesn't play
339 MP4SetTrackIntegerProperty(m->file, mux_data->track, "tkhd.flags", (TRACK_DISABLED | TRACK_IN_MOVIE));
340 hb_log("Disabled extra audio track %i", mux_data->track-1);
345 if (job->chapter_markers)
347 /* add a text track for the chapters */
348 MP4TrackId textTrack;
349 textTrack = MP4AddChapterTextTrack(m->file, firstAudioTrack);
351 m->chapter_track = textTrack;
352 m->chapter_duration = 0;
353 m->current_chapter = job->chapter_start;
356 /* Add encoded-by metadata listing version and build date */
358 tool_string = (char *)malloc(80);
359 snprintf( tool_string, 80, "HandBrake %s %i", HB_VERSION, HB_BUILD);
360 MP4SetMetadataTool(m->file, tool_string);
366 static int MP4Mux( hb_mux_object_t * m, hb_mux_data_t * mux_data,
369 hb_job_t * job = m->job;
373 if( mux_data == job->mux_data )
375 /* Add the sample before the new frame.
376 It is important that this be calculated prior to the duration
377 of the new video sample, as we want to sync to right after it.
378 (This is because of how durations for text tracks work in QT) */
379 if( job->chapter_markers && buf->new_chap )
381 struct hb_text_sample_s *sample;
383 /* If this is an x264 encode with bframes the IDR frame we're
384 trying to mark will be displayed offset by its renderOffset
385 so we need to offset the chapter by the same amount.
386 MP4 render offsets don't seem to work for text tracks so
387 we have to fudge the duration instead. */
388 duration = m->sum_dur - m->chapter_duration;
390 if ( job->areBframes )
392 duration += buf->renderOffset * job->arate / 90000;
395 sample = MP4GenerateChapterSample( m, duration );
397 if( !MP4WriteSample(m->file,
404 hb_error("Failed to write to output file, disk full?");
408 m->current_chapter++;
409 m->chapter_duration += duration;
413 /* Because we use the audio samplerate as the timescale,
414 we have to use potentially variable durations so the video
415 doesn't go out of sync */
418 duration = ( ( buf->stop * job->arate / 90000 ) - ( buf->start * job->arate / 90000 ) );
422 duration = ( buf->stop * job->arate / 90000 ) - m->sum_dur;
424 m->sum_dur += duration;
429 duration = MP4_INVALID_DURATION;
432 /* Here's where the sample actually gets muxed.
433 If it's an audio sample, don't offset the sample's playback.
434 If it's a video sample and there are no b-frames, ditto.
435 If there are b-frames, offset by the initDelay plus the
436 difference between the presentation time stamp x264 gives
437 and the decoding time stamp from the buffer data. */
438 if( !MP4WriteSample( m->file,
443 ((mux_data->track != 1) ||
444 (job->areBframes==0) ||
445 (job->vcodec != HB_VCODEC_X264)) ? 0 : ( buf->renderOffset * job->arate / 90000),
446 ((buf->frametype & HB_FRAME_KEY) != 0) ) )
448 hb_error("Failed to write to output file, disk full?");
455 static int MP4End( hb_mux_object_t * m )
457 hb_job_t * job = m->job;
459 /* Write our final chapter marker */
460 if( m->job->chapter_markers )
462 struct hb_text_sample_s *sample = MP4GenerateChapterSample( m, (m->sum_dur - m->chapter_duration) );
464 if( !MP4WriteSample(m->file,
471 hb_error("Failed to write to output file, disk full?");
479 // Insert track edit to get A/V back in sync. The edit amount is
480 // the rendering offset of the first sample.
481 MP4AddTrackEdit(m->file, 1, MP4_INVALID_EDIT_ID, MP4GetSampleRenderingOffset(m->file,1,1),
482 MP4GetTrackDuration(m->file, 1), 0);
483 if ( m->job->chapter_markers )
485 // apply same edit to chapter track to keep it in sync with video
486 MP4AddTrackEdit(m->file, m->chapter_track, MP4_INVALID_EDIT_ID,
487 MP4GetSampleRenderingOffset(m->file,1,1),
488 MP4GetTrackDuration(m->file, m->chapter_track), 0);
494 if ( job->mp4_optimize )
496 hb_log( "muxmp4: optimizing file" );
497 char filename[1024]; memset( filename, 0, 1024 );
498 snprintf( filename, 1024, "%s.tmp", job->file );
499 MP4Optimize( job->file, filename, MP4_DETAILS_ERROR );
501 rename( filename, job->file );
507 hb_mux_object_t * hb_mux_mp4_init( hb_job_t * job )
509 hb_mux_object_t * m = calloc( sizeof( hb_mux_object_t ), 1 );