/* create AudioSpecificConfig as memory block from summary, and set it into that summary itself */
int lsmash_setup_AudioSpecificConfig( lsmash_audio_summary_t *summary )
{
if( !summary || !summary->opaque )
return LSMASH_ERR_FUNCTION_PARAM;
/* Remove an old one. */
for( lsmash_entry_t *entry = summary->opaque->list.head; entry; entry = entry->next )
{
lsmash_codec_specific_t *cs = (lsmash_codec_specific_t *)entry->data;
if( !cs || cs->type != LSMASH_CODEC_SPECIFIC_DATA_TYPE_MP4SYS_DECODER_CONFIG )
continue;
lsmash_remove_entry_direct( &summary->opaque->list, entry, lsmash_destroy_codec_specific_data );
}
/* Create and add a new one. */
uint32_t data_length;
uint8_t *data = mp4a_export_AudioSpecificConfig( summary->aot,
summary->frequency,
summary->channels,
summary->sbr_mode,
NULL, /* FIXME */
0, /* FIXME */
&data_length );
if( !data )
return LSMASH_ERR_NAMELESS;
lsmash_codec_specific_t *cs = lsmash_create_codec_specific_data( LSMASH_CODEC_SPECIFIC_DATA_TYPE_MP4SYS_DECODER_CONFIG,
LSMASH_CODEC_SPECIFIC_FORMAT_STRUCTURED );
if( !cs )
{
lsmash_free( data );
return LSMASH_ERR_MEMORY_ALLOC;
}
lsmash_mp4sys_decoder_parameters_t *param = (lsmash_mp4sys_decoder_parameters_t *)cs->data.structured;
param->objectTypeIndication = MP4SYS_OBJECT_TYPE_Audio_ISO_14496_3;
param->streamType = MP4SYS_STREAM_TYPE_AudioStream;
int err = lsmash_set_mp4sys_decoder_specific_info( param, data, data_length );
lsmash_free( data );
if( err < 0 || (err = lsmash_add_entry( &summary->opaque->list, cs )) < 0 )
{
lsmash_destroy_codec_specific_data( cs );
return err;
}
return 0;
}
int lsmash_create_reference_chapter_track( lsmash_root_t *root, uint32_t track_ID, char *file_name )
{
if( !root || !root->moov || !root->moov->mvhd || !root->moov->trak_list )
goto error_message;
if( !root->qt_compatible && !root->itunes_movie )
{
lsmash_log( LSMASH_LOG_ERROR, "reference chapter is not available for this file.\n" );
goto error_message;
}
FILE *chapter = NULL; /* shut up 'uninitialized' warning */
/* Create a Track Reference Box. */
isom_trak_entry_t *trak = isom_get_trak( root, track_ID );
if( !trak )
{
lsmash_log( LSMASH_LOG_ERROR, "the specified track ID to apply the chapter doesn't exist.\n" );
goto error_message;
}
if( isom_add_tref( trak ) )
goto error_message;
/* Create a track_ID for a new chapter track. */
uint32_t *id = (uint32_t *)malloc( sizeof(uint32_t) );
if( !id )
goto error_message;
uint32_t chapter_track_ID = *id = root->moov->mvhd->next_track_ID;
/* Create a Track Reference Type Box. */
isom_tref_type_t *chap = isom_add_track_reference_type( trak->tref, QT_TREF_TYPE_CHAP, 1, id );
if( !chap )
goto error_message; /* no need to free id */
/* Create a reference chapter track. */
if( chapter_track_ID != lsmash_create_track( root, ISOM_MEDIA_HANDLER_TYPE_TEXT_TRACK ) )
goto error_message;
/* Set track parameters. */
lsmash_track_parameters_t track_param;
lsmash_initialize_track_parameters( &track_param );
track_param.mode = ISOM_TRACK_IN_MOVIE | ISOM_TRACK_IN_PREVIEW;
if( lsmash_set_track_parameters( root, chapter_track_ID, &track_param ) )
goto fail;
/* Set media parameters. */
uint64_t media_timescale = lsmash_get_media_timescale( root, track_ID );
if( !media_timescale )
goto fail;
lsmash_media_parameters_t media_param;
lsmash_initialize_media_parameters( &media_param );
media_param.timescale = media_timescale;
media_param.ISO_language = root->max_3gpp_version >= 6 || root->itunes_movie ? ISOM_LANGUAGE_CODE_UNDEFINED : 0;
media_param.MAC_language = 0;
if( lsmash_set_media_parameters( root, chapter_track_ID, &media_param ) )
goto fail;
/* Create a sample description. */
lsmash_codec_type_t sample_type = root->max_3gpp_version >= 6 || root->itunes_movie
? ISOM_CODEC_TYPE_TX3G_TEXT
: QT_CODEC_TYPE_TEXT_TEXT;
lsmash_summary_t summary = { .sample_type = sample_type };
uint32_t sample_entry = lsmash_add_sample_entry( root, chapter_track_ID, &summary );
if( !sample_entry )
goto fail;
/* Check each line format. */
fn_get_chapter_data fnc = isom_check_chap_line( file_name );
if( !fnc )
goto fail;
/* Open chapter format file. */
chapter = fopen( file_name, "rb" );
if( !chapter )
{
lsmash_log( LSMASH_LOG_ERROR, "failed to open the chapter file \"%s\".\n", file_name );
goto fail;
}
/* Parse the file and write text samples. */
isom_chapter_entry_t data;
while( !fnc( chapter, &data ) )
{
/* set start_time */
data.start_time = data.start_time * 1e-9 * media_timescale + 0.5;
/* write a text sample here */
int is_qt_text = lsmash_check_codec_type_identical( sample_type, QT_CODEC_TYPE_TEXT_TEXT );
uint16_t name_length = strlen( data.chapter_name );
lsmash_sample_t *sample = lsmash_create_sample( 2 + name_length + 12 * is_qt_text );
if( !sample )
{
free( data.chapter_name );
goto fail;
}
sample->data[0] = (name_length >> 8) & 0xff;
sample->data[1] = name_length & 0xff;
memcpy( sample->data + 2, data.chapter_name, name_length );
if( is_qt_text )
{
/* QuickTime Player requires Text Encoding Attribute Box ('encd') if media language is ISO language codes : undefined.
* Also this box can avoid garbling if the QuickTime text sample is encoded by Unicode characters.
* Note: 3GPP Timed Text supports only UTF-8 or UTF-16, so this box isn't needed. */
static const uint8_t encd[12] =
{
0x00, 0x00, 0x00, 0x0C, /* size: 12 */
0x65, 0x6E, 0x63, 0x64, /* type: 'encd' */
0x00, 0x00, 0x01, 0x00 /* Unicode Encoding */
};
memcpy( sample->data + 2 + name_length, encd, 12 );
}
sample->dts = sample->cts = data.start_time;
sample->prop.ra_flags = ISOM_SAMPLE_RANDOM_ACCESS_FLAG_SYNC;
sample->index = sample_entry;
if( lsmash_append_sample( root, chapter_track_ID, sample ) )
{
free( data.chapter_name );
goto fail;
}
free( data.chapter_name );
data.chapter_name = NULL;
}
if( lsmash_flush_pooled_samples( root, chapter_track_ID, 0 ) )
goto fail;
isom_trak_entry_t *chapter_trak = isom_get_trak( root, chapter_track_ID );
if( !chapter_trak )
goto fail;
fclose( chapter );
chapter_trak->is_chapter = 1;
chapter_trak->related_track_ID = track_ID;
return 0;
fail:
if( chapter )
fclose( chapter );
/* Remove chapter track reference. */
lsmash_remove_entry_direct( trak->tref->ref_list, trak->tref->ref_list->tail, isom_remove_track_reference_type );
if( trak->tref->ref_list->entry_count == 0 )
isom_remove_tref( trak->tref );
/* Remove the reference chapter track attached at tail of the list. */
lsmash_remove_entry_direct( root->moov->trak_list, root->moov->trak_list->tail, isom_remove_trak );
error_message:
lsmash_log( LSMASH_LOG_ERROR, "failed to set reference chapter.\n" );
return -1;
}
