static void bs_alloc( lsmash_bs_t *bs, size_t alloc )
{
if( (bs->buffer.alloc >= alloc) || bs->error )
return;
if( !bs->buffer.internal )
{
/* We cannot re-allocate the memory block. */
bs->error = 1;
return;
}
alloc += (1 << 16);
alloc = LSMASH_MAX( alloc, bs->buffer.max_size );
uint8_t *data;
if( !bs->buffer.data )
data = lsmash_malloc( alloc );
else
data = lsmash_realloc( bs->buffer.data, alloc );
if( !data )
{
bs_buffer_free( bs );
bs->error = 1;
return;
}
bs->buffer.internal = 1;
bs->buffer.data = data;
bs->buffer.alloc = alloc;
}
/* TODO: Support offset > INT64_MAX */
int64_t lsmash_bs_read_seek( lsmash_bs_t *bs, int64_t offset, int whence )
{
if( whence != SEEK_SET && whence != SEEK_CUR && whence != SEEK_END )
return LSMASH_ERR_FUNCTION_PARAM;
if( whence == SEEK_CUR )
offset -= lsmash_bs_get_remaining_buffer_size( bs );
/* Check whether we can seek on the buffer. */
if( !bs->buffer.unseekable )
{
assert( bs->offset >= bs->buffer.store );
uint64_t dst_offset = bs_estimate_seek_offset( bs, offset, whence );
uint64_t offset_s = bs->offset - bs->buffer.store;
uint64_t offset_e = bs->offset;
if( bs->unseekable || (dst_offset >= offset_s && dst_offset < offset_e) )
{
/* OK, we can. So, seek on the buffer. */
bs->buffer.pos = dst_offset - offset_s;
bs->eob = 0;
return lsmash_bs_get_stream_pos( bs );
}
}
if( bs->unseekable )
return LSMASH_ERR_NAMELESS;
/* Try to seek the stream. */
int64_t ret = bs->seek( bs->stream, offset, whence );
if( ret < 0 )
return ret;
bs->offset = ret;
bs->written = LSMASH_MAX( bs->written, bs->offset );
bs->eof = 0;
bs->eob = 0;
/* The data on the buffer is invalid. */
lsmash_bs_empty( bs );
return ret;
}
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;
}
lsmash_file_t *lsmash_set_file
(
lsmash_root_t *root,
lsmash_file_parameters_t *param
)
{
if( !root || !param )
return NULL;
lsmash_file_t *file = isom_add_file( root );
if( !file )
return NULL;
lsmash_bs_t *bs = lsmash_bs_create();
if( !bs )
goto fail;
file->bs = bs;
file->flags = param->mode;
file->bs->stream = param->opaque;
file->bs->read = param->read;
file->bs->write = param->write;
file->bs->seek = param->seek;
file->bs->unseekable = (param->seek == NULL);
file->bs->buffer.max_size = param->max_read_size;
file->max_chunk_duration = param->max_chunk_duration;
file->max_async_tolerance = LSMASH_MAX( param->max_async_tolerance, 2 * param->max_chunk_duration );
file->max_chunk_size = param->max_chunk_size;
if( (file->flags & LSMASH_FILE_MODE_WRITE)
&& (file->flags & LSMASH_FILE_MODE_BOX) )
{
/* Construction of Segment Index Box requires seekability at our current implementation.
* If segment is not so large, data rearrangement can be avoided by buffering i.e. the
* seekability is not essential, but at present we don't support buffering of all materials
* within segment. */
if( (file->flags & LSMASH_FILE_MODE_INDEX) && file->bs->unseekable )
goto fail;
/* Establish the fragment handler if required. */
if( file->flags & LSMASH_FILE_MODE_FRAGMENTED )
{
file->fragment = lsmash_malloc_zero( sizeof(isom_fragment_manager_t) );
if( !file->fragment )
goto fail;
file->fragment->first_moof_pos = FIRST_MOOF_POS_UNDETERMINED;
file->fragment->pool = lsmash_create_entry_list();
if( !file->fragment->pool )
goto fail;
}
else if( file->bs->unseekable )
/* For unseekable output operations, LSMASH_FILE_MODE_FRAGMENTED shall be set. */
goto fail;
/* Establish file types. */
if( isom_set_brands( file, param->major_brand,
param->minor_version,
param->brands, param->brand_count ) < 0 )
goto fail;
/* Create the movie header if the initialization of the streams is required. */
if( (file->flags & LSMASH_FILE_MODE_INITIALIZATION) && !isom_movie_create( file ) )
goto fail;
}
if( !root->file )
root->file = file;
return file;
fail:
isom_remove_box_by_itself( file );
return NULL;
}
static int vc1_analyze_whole_stream
(
importer_t *importer
)
{
/* Parse all EBDU in the stream for preparation of calculating timestamps. */
uint32_t cts_alloc = (1 << 12) * sizeof(uint64_t);
uint64_t *cts = lsmash_malloc( cts_alloc );
if( !cts )
return LSMASH_ERR_MEMORY_ALLOC; /* Failed to allocate CTS list */
uint32_t num_access_units = 0;
uint32_t num_consecutive_b = 0;
lsmash_class_t *logger = &(lsmash_class_t){ "VC-1" };
lsmash_log( &logger, LSMASH_LOG_INFO, "Analyzing stream as VC-1\r" );
vc1_importer_t *vc1_imp = (vc1_importer_t *)importer->info;
vc1_info_t *info = &vc1_imp->info;
importer->status = IMPORTER_OK;
int err;
while( importer->status != IMPORTER_EOF )
{
#if 0
lsmash_log( &logger, LSMASH_LOG_INFO, "Analyzing stream as VC-1: %"PRIu32"\n", num_access_units + 1 );
#endif
if( (err = vc1_importer_get_access_unit_internal( importer, 1 )) < 0 )
goto fail;
vc1_importer_check_eof( importer, &info->access_unit );
/* In the case where B-pictures exist
* Decode order
* I[0]P[1]P[2]B[3]B[4]P[5]...
* DTS
* 0 1 2 3 4 5 ...
* Composition order
* I[0]P[1]B[3]B[4]P[2]P[5]...
* CTS
* 1 2 3 4 5 6 ...
* We assumes B or BI-pictures always be present in the stream here. */
if( !info->access_unit.disposable )
{
/* Apply CTS of the last B-picture plus 1 to the last non-B-picture. */
if( num_access_units > num_consecutive_b )
cts[ num_access_units - num_consecutive_b - 1 ] = num_access_units;
num_consecutive_b = 0;
}
else /* B or BI-picture */
{
/* B and BI-pictures shall be output or displayed in the same order as they are encoded. */
cts[ num_access_units ] = num_access_units;
++num_consecutive_b;
info->dvc1_param.bframe_present = 1;
}
if( cts_alloc <= num_access_units * sizeof(uint64_t) )
{
uint32_t alloc = 2 * num_access_units * sizeof(uint64_t);
uint64_t *temp = lsmash_realloc( cts, alloc );
if( !temp )
{
err = LSMASH_ERR_MEMORY_ALLOC;
goto fail; /* Failed to re-allocate CTS list */
}
cts = temp;
cts_alloc = alloc;
}
vc1_imp->max_au_length = LSMASH_MAX( info->access_unit.data_length, vc1_imp->max_au_length );
++num_access_units;
}
if( num_access_units > num_consecutive_b )
cts[ num_access_units - num_consecutive_b - 1 ] = num_access_units;
else
{
err = LSMASH_ERR_INVALID_DATA;
goto fail;
}
/* Construct timestamps. */
lsmash_media_ts_t *timestamp = lsmash_malloc( num_access_units * sizeof(lsmash_media_ts_t) );
if( !timestamp )
{
err = LSMASH_ERR_MEMORY_ALLOC;
goto fail; /* Failed to allocate timestamp list */
}
for( uint32_t i = 1; i < num_access_units; i++ )
if( cts[i] < cts[i - 1] )
{
vc1_imp->composition_reordering_present = 1;
break;
}
if( vc1_imp->composition_reordering_present )
for( uint32_t i = 0; i < num_access_units; i++ )
{
timestamp[i].cts = cts[i];
timestamp[i].dts = i;
}
else
for( uint32_t i = 0; i < num_access_units; i++ )
timestamp[i].cts = timestamp[i].dts = i;
lsmash_free( cts );
lsmash_log_refresh_line( &logger );
#if 0
for( uint32_t i = 0; i < num_access_units; i++ )
fprintf( stderr, "Timestamp[%"PRIu32"]: DTS=%"PRIu64", CTS=%"PRIu64"\n", i, timestamp[i].dts, timestamp[i].cts );
#endif
vc1_imp->ts_list.sample_count = num_access_units;
vc1_imp->ts_list.timestamp = timestamp;
return 0;
fail:
lsmash_log_refresh_line( &logger );
lsmash_free( cts );
return err;
}
