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add FLAC__metadata_get_tags(), FLAC::Metadata::get_tags()

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This commit is contained in:
Josh Coalson
2004-07-30 01:54:29 +00:00
parent 9645dddaad
commit 1aca6b114b
7 changed files with 164 additions and 18 deletions
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84
src/libFLAC/metadata_iterators.c
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@@ -153,8 +153,8 @@ static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecode
typedef struct {
FLAC__bool got_error;
FLAC__bool got_streaminfo;
FLAC__StreamMetadata *streaminfo;
FLAC__bool got_object;
FLAC__StreamMetadata *object;
} level0_client_data;
FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
@@ -171,8 +171,8 @@ FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__St
return false;
cd.got_error = false;
cd.got_streaminfo = false;
cd.streaminfo = streaminfo;
cd.got_object = false;
cd.object = 0;
FLAC__file_decoder_set_md5_checking(decoder, false);
FLAC__file_decoder_set_filename(decoder, filename);
@@ -189,17 +189,77 @@ FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__St
return false;
}
/* the first thing decoded must be the STREAMINFO block: */
if(!FLAC__file_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
FLAC__file_decoder_finish(decoder);
FLAC__file_decoder_delete(decoder);
if(0 != cd.object)
FLAC__metadata_object_delete(cd.object);
return false;
}
FLAC__file_decoder_finish(decoder);
FLAC__file_decoder_delete(decoder);
return !cd.got_error && cd.got_streaminfo;
if(cd.got_object) {
/* can just copy the contents since STREAMINFO has no internal structure */
*streaminfo = *(cd.object);
}
if(0 != cd.object)
FLAC__metadata_object_delete(cd.object);
return cd.got_object;
}
FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
{
level0_client_data cd;
FLAC__FileDecoder *decoder;
FLAC__ASSERT(0 != filename);
FLAC__ASSERT(0 != tags);
decoder = FLAC__file_decoder_new();
if(0 == decoder)
return false;
*tags = 0;
cd.got_error = false;
cd.got_object = false;
cd.object = 0;
FLAC__file_decoder_set_md5_checking(decoder, false);
FLAC__file_decoder_set_filename(decoder, filename);
FLAC__file_decoder_set_metadata_ignore_all(decoder);
FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__file_decoder_set_write_callback(decoder, write_callback_);
FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
FLAC__file_decoder_set_error_callback(decoder, error_callback_);
FLAC__file_decoder_set_client_data(decoder, &cd);
if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK || cd.got_error) {
FLAC__file_decoder_finish(decoder);
FLAC__file_decoder_delete(decoder);
return false;
}
if(!FLAC__file_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
FLAC__file_decoder_finish(decoder);
FLAC__file_decoder_delete(decoder);
if(0 != cd.object)
FLAC__metadata_object_delete(cd.object);
return false;
}
FLAC__file_decoder_finish(decoder);
FLAC__file_decoder_delete(decoder);
if(cd.got_object)
*tags = cd.object;
return cd.got_object;
}
FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
@@ -214,9 +274,15 @@ void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMeta
level0_client_data *cd = (level0_client_data *)client_data;
(void)decoder;
if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO && 0 != cd->streaminfo) {
*(cd->streaminfo) = *metadata;
cd->got_streaminfo = true;
/*
* we assume we only get here when the one metadata block we were
* looking for was passed to us
*/
if(!cd->got_object) {
if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
cd->got_error = true;
else
cd->got_object = true;
}
}