static int isom_read_minimum_chapter( FILE *chapter, isom_chapter_entry_t *data )
{
char buff[CHAPTER_BUFSIZE];
if( isom_lumber_line( buff, CHAPTER_BUFSIZE, chapter ) < 0 ) /* read newline */
return LSMASH_ERR_NAMELESS;
char *p_buff = &buff[ !memcmp( buff, UTF8_BOM, UTF8_BOM_LENGTH ) ? UTF8_BOM_LENGTH : 0 ]; /* BOM detection */
if( isom_get_start_time( p_buff, data ) < 0 ) /* get start_time */
return LSMASH_ERR_INVALID_DATA;
/* get chapter_name */
char *chapter_name = strchr( buff, ' ' ); /* find separator */
if( !chapter_name++ )
return LSMASH_ERR_INVALID_DATA;
int len = LSMASH_MIN( 255, strlen( chapter_name ) ); /* We support length of chapter_name up to 255 */
data->chapter_name = (char *)lsmash_malloc( len + 1 );
if( !data->chapter_name )
return LSMASH_ERR_MEMORY_ALLOC;
memcpy( data->chapter_name, chapter_name, len );
data->chapter_name[len] = '\0';
return 0;
}
static int isom_read_minimum_chapter( FILE *chapter, isom_chapter_entry_t *data )
{
char buff[CHAPTER_BUFSIZE];
int len;
if( isom_lumber_line( buff, CHAPTER_BUFSIZE, chapter ) ) /* read newline */
return -1;
char *p_buff = !memcmp( buff, UTF8_BOM, UTF8_BOM_LENGTH ) ? &buff[UTF8_BOM_LENGTH] : &buff[0]; /* BOM detection */
if( isom_get_start_time( p_buff, data ) ) /* get start_time */
return -1;
/* get chapter_name */
char *chapter_name = strchr( buff, ' ' ); /* find separator */
if( !chapter_name++ )
return -1;
len = LSMASH_MIN( 255, strlen( chapter_name ) ); /* We support length of chapter_name up to 255 */
data->chapter_name = (char *)malloc( len + 1 );
if( !data->chapter_name )
return -1;
memcpy( data->chapter_name, chapter_name, len );
data->chapter_name[len] = '\0';
return 0;
}
static int isom_read_simple_chapter( FILE *chapter, isom_chapter_entry_t *data )
{
char buff[CHAPTER_BUFSIZE];
/* get start_time */
if( isom_lumber_line( buff, CHAPTER_BUFSIZE, chapter ) < 0 )
return LSMASH_ERR_NAMELESS;
char *chapter_time = strchr( buff, '=' ); /* find separator */
if( !chapter_time++ )
return LSMASH_ERR_INVALID_DATA;
if( isom_get_start_time( chapter_time, data ) < 0 )
return LSMASH_ERR_INVALID_DATA;
if( isom_lumber_line( buff, CHAPTER_BUFSIZE, chapter ) < 0 ) /* get chapter_name */
return LSMASH_ERR_NAMELESS;
char *chapter_name = strchr( buff, '=' ); /* find separator */
if( !chapter_name++ )
return LSMASH_ERR_INVALID_DATA;
int len = LSMASH_MIN( 255, strlen( chapter_name ) ); /* We support length of chapter_name up to 255 */
data->chapter_name = (char *)lsmash_malloc( len + 1 );
if( !data->chapter_name )
return LSMASH_ERR_MEMORY_ALLOC;
memcpy( data->chapter_name, chapter_name, len );
data->chapter_name[len] = '\0';
return 0;
}
static int isom_read_simple_chapter( FILE *chapter, isom_chapter_entry_t *data )
{
char buff[CHAPTER_BUFSIZE];
int len;
/* get start_time */
if( isom_lumber_line( buff, CHAPTER_BUFSIZE, chapter ) )
return -1;
char *chapter_time = strchr( buff, '=' ); /* find separator */
if( !chapter_time++
|| isom_get_start_time( chapter_time, data )
|| isom_lumber_line( buff, CHAPTER_BUFSIZE, chapter ) ) /* get chapter_name */
return -1;
char *chapter_name = strchr( buff, '=' ); /* find separator */
if( !chapter_name++ )
return -1;
len = LSMASH_MIN( 255, strlen( chapter_name ) ); /* We support length of chapter_name up to 255 */
data->chapter_name = (char *)malloc( len + 1 );
if( !data->chapter_name )
return -1;
memcpy( data->chapter_name, chapter_name, len );
data->chapter_name[len] = '\0';
return 0;
}
int isom_check_compatibility
(
lsmash_file_t *file
)
{
if( !file )
return LSMASH_ERR_FUNCTION_PARAM;
isom_clear_compat_flags( file );
/* Get the brand container. */
isom_ftyp_t *ftyp = file->ftyp ? file->ftyp : (isom_ftyp_t *)lsmash_get_entry_data( &file->styp_list, 1 );
/* Check brand to decide mandatory boxes. */
if( !ftyp )
{
/* No brand declaration means this file is a MP4 version 1 or QuickTime file format. */
if( file->moov
&& file->moov->iods )
{
file->mp4_version1 = 1;
file->isom_compatible = 1;
}
else
{
file->qt_compatible = 1;
file->undefined_64_ver = 1;
}
return 0;
}
for( uint32_t i = 0; i <= ftyp->brand_count; i++ )
{
uint32_t brand = (i == ftyp->brand_count ? ftyp->major_brand : ftyp->compatible_brands[i]);
switch( brand )
{
case ISOM_BRAND_TYPE_QT :
file->qt_compatible = 1;
break;
case ISOM_BRAND_TYPE_MP41 :
file->mp4_version1 = 1;
break;
case ISOM_BRAND_TYPE_MP42 :
file->mp4_version2 = 1;
break;
case ISOM_BRAND_TYPE_AVC1 :
case ISOM_BRAND_TYPE_ISOM :
file->max_isom_version = LSMASH_MAX( file->max_isom_version, 1 );
file->min_isom_version = LSMASH_MIN( file->min_isom_version, 1 );
break;
case ISOM_BRAND_TYPE_ISO2 :
file->max_isom_version = LSMASH_MAX( file->max_isom_version, 2 );
file->min_isom_version = LSMASH_MIN( file->min_isom_version, 2 );
break;
case ISOM_BRAND_TYPE_ISO3 :
file->max_isom_version = LSMASH_MAX( file->max_isom_version, 3 );
file->min_isom_version = LSMASH_MIN( file->min_isom_version, 3 );
break;
case ISOM_BRAND_TYPE_ISO4 :
file->max_isom_version = LSMASH_MAX( file->max_isom_version, 4 );
file->min_isom_version = LSMASH_MIN( file->min_isom_version, 4 );
break;
case ISOM_BRAND_TYPE_ISO5 :
file->max_isom_version = LSMASH_MAX( file->max_isom_version, 5 );
file->min_isom_version = LSMASH_MIN( file->min_isom_version, 5 );
break;
case ISOM_BRAND_TYPE_ISO6 :
file->max_isom_version = LSMASH_MAX( file->max_isom_version, 6 );
file->min_isom_version = LSMASH_MIN( file->min_isom_version, 6 );
break;
case ISOM_BRAND_TYPE_ISO7 :
file->max_isom_version = LSMASH_MAX( file->max_isom_version, 7 );
file->min_isom_version = LSMASH_MIN( file->min_isom_version, 7 );
break;
case ISOM_BRAND_TYPE_M4A :
case ISOM_BRAND_TYPE_M4B :
case ISOM_BRAND_TYPE_M4P :
case ISOM_BRAND_TYPE_M4V :
file->itunes_movie = 1;
break;
case ISOM_BRAND_TYPE_3GP4 :
file->max_3gpp_version = LSMASH_MAX( file->max_3gpp_version, 4 );
break;
case ISOM_BRAND_TYPE_3GP5 :
file->max_3gpp_version = LSMASH_MAX( file->max_3gpp_version, 5 );
break;
case ISOM_BRAND_TYPE_3GE6 :
case ISOM_BRAND_TYPE_3GG6 :
case ISOM_BRAND_TYPE_3GP6 :
case ISOM_BRAND_TYPE_3GR6 :
case ISOM_BRAND_TYPE_3GS6 :
file->max_3gpp_version = LSMASH_MAX( file->max_3gpp_version, 6 );
break;
case ISOM_BRAND_TYPE_3GP7 :
file->max_3gpp_version = LSMASH_MAX( file->max_3gpp_version, 7 );
break;
case ISOM_BRAND_TYPE_3GP8 :
file->max_3gpp_version = LSMASH_MAX( file->max_3gpp_version, 8 );
break;
case ISOM_BRAND_TYPE_3GE9 :
case ISOM_BRAND_TYPE_3GF9 :
case ISOM_BRAND_TYPE_3GG9 :
case ISOM_BRAND_TYPE_3GH9 :
case ISOM_BRAND_TYPE_3GM9 :
case ISOM_BRAND_TYPE_3GP9 :
case ISOM_BRAND_TYPE_3GR9 :
case ISOM_BRAND_TYPE_3GS9 :
case ISOM_BRAND_TYPE_3GT9 :
file->max_3gpp_version = LSMASH_MAX( file->max_3gpp_version, 9 );
break;
default :
break;
}
switch( brand )
{
case ISOM_BRAND_TYPE_AVC1 :
case ISOM_BRAND_TYPE_ISO2 :
case ISOM_BRAND_TYPE_ISO3 :
case ISOM_BRAND_TYPE_ISO4 :
case ISOM_BRAND_TYPE_ISO5 :
case ISOM_BRAND_TYPE_ISO6 :
file->avc_extensions = 1;
break;
case ISOM_BRAND_TYPE_3GP4 :
case ISOM_BRAND_TYPE_3GP5 :
case ISOM_BRAND_TYPE_3GP6 :
case ISOM_BRAND_TYPE_3GP7 :
case ISOM_BRAND_TYPE_3GP8 :
case ISOM_BRAND_TYPE_3GP9 :
file->forbid_tref = 1;
break;
case ISOM_BRAND_TYPE_3GH9 :
case ISOM_BRAND_TYPE_3GM9 :
case ISOM_BRAND_TYPE_DASH :
case ISOM_BRAND_TYPE_DSMS :
case ISOM_BRAND_TYPE_LMSG :
case ISOM_BRAND_TYPE_MSDH :
case ISOM_BRAND_TYPE_MSIX :
case ISOM_BRAND_TYPE_SIMS :
file->media_segment = 1;
break;
default :
break;
}
}
file->isom_compatible = !file->qt_compatible
|| file->mp4_version1
|| file->mp4_version2
|| file->itunes_movie
|| file->max_3gpp_version;
file->undefined_64_ver = file->qt_compatible || file->itunes_movie;
if( file->flags & LSMASH_FILE_MODE_WRITE )
{
/* Media Segment is incompatible with ISO Base Media File Format version 4 or former must be compatible with
* version 6 or later since it requires default-base-is-moof and Track Fragment Base Media Decode Time Box. */
if( file->media_segment && (file->min_isom_version < 5 || (file->max_isom_version && file->max_isom_version < 6)) )
return LSMASH_ERR_INVALID_DATA;
file->allow_moof_base = (file->max_isom_version >= 5 && file->min_isom_version >= 5)
|| (file->max_isom_version == 0 && file->min_isom_version == UINT8_MAX && file->media_segment);
}
return 0;
}
static int dts_importer_get_next_accessunit_internal( importer_t *importer )
{
int au_completed = 0;
dts_importer_t *dts_imp = (dts_importer_t *)importer->info;
dts_info_t *info = &dts_imp->info;
lsmash_bs_t *bs = info->bits->bs;
while( !au_completed )
{
/* Read data from the stream if needed. */
dts_imp->next_frame_pos += info->frame_size;
lsmash_bs_read_seek( bs, dts_imp->next_frame_pos, SEEK_SET );
uint64_t remain_size = lsmash_bs_get_remaining_buffer_size( bs );
if( remain_size < DTS_MAX_EXSS_SIZE )
{
int err = lsmash_bs_read( bs, bs->buffer.max_size );
if( err < 0 )
{
lsmash_log( importer, LSMASH_LOG_ERROR, "failed to read data from the stream.\n" );
return err;
}
remain_size = lsmash_bs_get_remaining_buffer_size( bs );
}
memcpy( dts_imp->buffer, lsmash_bs_get_buffer_data( bs ), LSMASH_MIN( remain_size, DTS_MAX_EXSS_SIZE ) );
/* Check the remainder length of the buffer.
* If there is enough length, then parse the frame in it.
* The length 10 is the required byte length to get frame size. */
if( bs->eob || (bs->eof && remain_size < 10) )
{
/* Reached the end of stream. */
importer->status = IMPORTER_EOF;
au_completed = !!dts_imp->incomplete_au_length;
if( !au_completed )
{
/* No more access units in the stream. */
if( lsmash_bs_get_remaining_buffer_size( bs ) )
{
lsmash_log( importer, LSMASH_LOG_WARNING, "the stream is truncated at the end.\n" );
return LSMASH_ERR_INVALID_DATA;
}
return 0;
}
if( !info->ddts_param_initialized )
dts_update_specific_param( info );
}
else
{
/* Parse substream frame. */
dts_substream_type prev_substream_type = info->substream_type;
info->substream_type = dts_get_substream_type( info );
int err;
int (*dts_parse_frame)( dts_info_t * ) = NULL;
switch( info->substream_type )
{
/* Decide substream frame parser and check if this frame and the previous frame belong to the same AU. */
case DTS_SUBSTREAM_TYPE_CORE :
if( prev_substream_type != DTS_SUBSTREAM_TYPE_NONE )
au_completed = 1;
dts_parse_frame = dts_parse_core_substream;
break;
case DTS_SUBSTREAM_TYPE_EXTENSION :
{
uint8_t prev_exss_index = info->exss_index;
if( (err = dts_get_exss_index( info, &info->exss_index )) < 0 )
{
lsmash_log( importer, LSMASH_LOG_ERROR, "failed to get the index of an extension substream.\n" );
return err;
}
if( prev_substream_type == DTS_SUBSTREAM_TYPE_EXTENSION
&& info->exss_index <= prev_exss_index )
au_completed = 1;
dts_parse_frame = dts_parse_extension_substream;
break;
}
default :
lsmash_log( importer, LSMASH_LOG_ERROR, "unknown substream type is detected.\n" );
return LSMASH_ERR_NAMELESS;
}
if( !info->ddts_param_initialized && au_completed )
dts_update_specific_param( info );
info->frame_size = 0;
if( (err = dts_parse_frame( info )) < 0 )
{
lsmash_log( importer, LSMASH_LOG_ERROR, "failed to parse a frame.\n" );
return err;
}
}
if( au_completed )
{
memcpy( dts_imp->au, dts_imp->incomplete_au, dts_imp->incomplete_au_length );
dts_imp->au_length = dts_imp->incomplete_au_length;
dts_imp->incomplete_au_length = 0;
info->exss_count = (info->substream_type == DTS_SUBSTREAM_TYPE_EXTENSION);
if( importer->status == IMPORTER_EOF )
break;
}
/* Increase buffer size to store AU if short. */
if( dts_imp->incomplete_au_length + info->frame_size > dts_imp->au_buffers->buffer_size )
{
lsmash_multiple_buffers_t *temp = lsmash_resize_multiple_buffers( dts_imp->au_buffers,
dts_imp->au_buffers->buffer_size + DTS_MAX_EXSS_SIZE );
if( !temp )
return LSMASH_ERR_MEMORY_ALLOC;
dts_imp->au_buffers = temp;
dts_imp->au = lsmash_withdraw_buffer( dts_imp->au_buffers, 1 );
dts_imp->incomplete_au = lsmash_withdraw_buffer( dts_imp->au_buffers, 2 );
}
/* Append frame data. */
memcpy( dts_imp->incomplete_au + dts_imp->incomplete_au_length, dts_imp->buffer, info->frame_size );
dts_imp->incomplete_au_length += info->frame_size;
}
return bs->error ? LSMASH_ERR_NAMELESS : 0;
}
