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[FFmpeg Decoder] Better handle Matroska tags 

Matroska files use the "TITLE" field for the album when there are
chapters. Also, Matroska container uses shorter gain field names for
album and track gain, differentiating them by either being global or
specific to each chapter.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
xcode15
Christopher Snowhill 2022-07-05 17:40:57 -07:00
parent a474b469fa
commit de72631ea5
1 changed files with 16 additions and 1 deletions
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17
Plugins/FFMPEG/FFMPEGDecoder.m
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@ -585,7 +585,12 @@ static uint8_t reverse_bits[0x100];
} else if(!strcasecmp(tag->key, "artist")) {
_artist = guess_encoding_of_string(tag->value);
} else if(!strcasecmp(tag->key, "title")) {
_title = guess_encoding_of_string(tag->value);
NSString *_tag = guess_encoding_of_string(tag->value);
if(i == 0 && formatCtx->nb_chapters > 1) {
_album = _tag;
} else {
_title = _tag;
}
} else if(!strcasecmp(tag->key, "date")) {
NSString *dateString = guess_encoding_of_string(tag->value);
_year = @([dateString intValue]);
@ -607,6 +612,16 @@ static uint8_t reverse_bits[0x100];
} else if(!strcasecmp(tag->key, "replaygain_track_peak")) {
NSString *rgValue = guess_encoding_of_string(tag->value);
_replayGainTrackPeak = [rgValue floatValue];
} else if(!strcasecmp(tag->key, "replaygain_gain")) {
// global or chapter gain
NSString *rgValue = guess_encoding_of_string(tag->value);
if(i == 0) _replayGainAlbumGain = [rgValue floatValue];
else _replayGainTrackGain = [rgValue floatValue];
} else if(!strcasecmp(tag->key, "replaygain_peak")) {
// global or chapter peak
NSString *rgValue = guess_encoding_of_string(tag->value);
if(i == 0) _replayGainAlbumPeak = [rgValue floatValue];
else _replayGainTrackPeak = [rgValue floatValue];
} else if(!strcasecmp(tag->key, "iTunNORM")) {
NSString *tagString = guess_encoding_of_string(tag->value);
NSArray *tag = [tagString componentsSeparatedByString:@" "];