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add more checks to PICTURE metadata: at most one type=1 and type=2 blocks, type=1 block must be 32x32 pixel PNG

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This commit is contained in:
Josh Coalson
2006-09-24 16:25:42 +00:00
parent 6e94c90e60
commit 3957c47022
1 changed files with 32 additions and 9 deletions
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41
src/libFLAC/stream_encoder.c
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@@ -633,7 +633,7 @@ FLAC_API void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder)
FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_stream(FLAC__StreamEncoder *encoder, FLAC__StreamEncoderWriteCallback write_callback, FLAC__StreamEncoderSeekCallback seek_callback, FLAC__StreamEncoderTellCallback tell_callback, FLAC__StreamEncoderMetadataCallback metadata_callback, void *client_data)
{
unsigned i;
FLAC__bool metadata_has_seektable, metadata_has_vorbis_comment;
FLAC__bool metadata_has_seektable, metadata_has_vorbis_comment, metadata_picture_has_type1, metadata_picture_has_type2;
FLAC__ASSERT(0 != encoder);
@@ -754,28 +754,51 @@ FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_stream(FLAC__St
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_has_seektable = false;
metadata_has_vorbis_comment = false;
metadata_picture_has_type1 = false;
metadata_picture_has_type2 = false;
for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_STREAMINFO)
const FLAC__StreamMetadata *m = encoder->protected_->metadata[i];
if(m->type == FLAC__METADATA_TYPE_STREAMINFO)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
else if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_SEEKTABLE) {
else if(m->type == FLAC__METADATA_TYPE_SEEKTABLE) {
if(metadata_has_seektable) /* only one is allowed */
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_has_seektable = true;
if(!FLAC__format_seektable_is_legal(&encoder->protected_->metadata[i]->data.seek_table))
if(!FLAC__format_seektable_is_legal(&m->data.seek_table))
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
}
else if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
else if(m->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
if(metadata_has_vorbis_comment) /* only one is allowed */
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_has_vorbis_comment = true;
}
else if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_CUESHEET) {
if(!FLAC__format_cuesheet_is_legal(&encoder->protected_->metadata[i]->data.cue_sheet, encoder->protected_->metadata[i]->data.cue_sheet.is_cd, /*violation=*/0))
else if(m->type == FLAC__METADATA_TYPE_CUESHEET) {
if(!FLAC__format_cuesheet_is_legal(&m->data.cue_sheet, m->data.cue_sheet.is_cd, /*violation=*/0))
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
}
else if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_PICTURE) {
if(!FLAC__format_picture_is_legal(&encoder->protected_->metadata[i]->data.picture, /*violation=*/0))
else if(m->type == FLAC__METADATA_TYPE_PICTURE) {
if(!FLAC__format_picture_is_legal(&m->data.picture, /*violation=*/0))
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) {
if(metadata_picture_has_type1) /* there should only be 1 per stream */
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_picture_has_type1 = true;
/* standard icon must be 32x32 pixel PNG */
if(
m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD &&
(
(strcmp(m->data.picture.mime_type, "image/png") && strcmp(m->data.picture.mime_type, "-->")) ||
m->data.picture.width != 32 ||
m->data.picture.height != 32
)
)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
}
else if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) {
if(metadata_picture_has_type2) /* there should only be 1 per stream */
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_picture_has_type2 = true;
}
}
}