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[FFmpeg Input] Implement SoundCheck tag support 

Implement support for the Sound Check tag format.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
xcode15
Christopher Snowhill 2022-07-02 04:21:28 -07:00
parent bf1afd1923
commit e9f580cfbc
2 changed files with 28 additions and 2 deletions
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1
Plugins/FFMPEG/FFMPEGDecoder.h
View File

@ -72,6 +72,7 @@ int64_t ffmpeg_seek(void *opaque, int64_t offset, int whence);
float replayGainAlbumPeak;
float replayGainTrackGain;
float replayGainTrackPeak;
float volumeScale;
int attachedPicIndex;
NSData *albumArt;

29
Plugins/FFMPEG/FFMPEGDecoder.m
View File

@ -477,6 +477,7 @@ static uint8_t reverse_bits[0x100];
replayGainAlbumPeak = 0.0;
replayGainTrackGain = 0.0;
replayGainTrackPeak = 0.0;
volumeScale = 1.0;
albumArt = [NSData data];
id3Metadata = @{};
metadataUpdated = NO;
@ -547,6 +548,7 @@ static uint8_t reverse_bits[0x100];
float _replayGainAlbumPeak = replayGainAlbumPeak;
float _replayGainTrackGain = replayGainTrackGain;
float _replayGainTrackPeak = replayGainTrackPeak;
float _volumeScale = volumeScale;
for(size_t i = 0; i < 2; ++i) {
AVDictionary *metadata;
if(i == 0) {
@ -605,6 +607,27 @@ 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, "iTunNORM")) {
NSString *tagString = guess_encoding_of_string(tag->value);
NSArray *tag = [tagString componentsSeparatedByString:@" "];
NSMutableArray *wantedTag = [[NSMutableArray alloc] init];
for(size_t i = 0; i < [tag count]; ++i) {
NSString *tagValue = tag[i];
if([tagValue length] == 8) {
[wantedTag addObject:tagValue];
}
}
if([wantedTag count] >= 10) {
NSScanner *scanner1 = [NSScanner scannerWithString:wantedTag[0]];
NSScanner *scanner2 = [NSScanner scannerWithString:wantedTag[1]];
unsigned int hexvalue1 = 0, hexvalue2 = 0;
[scanner1 scanHexInt:&hexvalue1];
[scanner2 scanHexInt:&hexvalue2];
float volume1 = -log10((double)(hexvalue1) / 1000) * 10;
float volume2 = -log10((double)(hexvalue2) / 1000) * 10;
float volumeToUse = MIN(volume1, volume2);
_volumeScale = pow(10, volumeToUse / 20);
}
}
}
}
@ -632,7 +655,8 @@ static uint8_t reverse_bits[0x100];
_replayGainAlbumGain != replayGainAlbumGain ||
_replayGainAlbumPeak != replayGainAlbumPeak ||
_replayGainTrackGain != replayGainTrackGain ||
_replayGainTrackPeak != replayGainTrackPeak) {
_replayGainTrackPeak != replayGainTrackPeak ||
_volumeScale != volumeScale) {
artist = _artist;
albumartist = _albumartist;
album = _album;
@ -645,6 +669,7 @@ static uint8_t reverse_bits[0x100];
replayGainAlbumPeak = _replayGainAlbumPeak;
replayGainTrackGain = _replayGainTrackGain;
replayGainTrackPeak = _replayGainTrackPeak;
volumeScale = _volumeScale;
if(![source seekable]) {
[self willChangeValueForKey:@"metadata"];
[self didChangeValueForKey:@"metadata"];
@ -969,7 +994,7 @@ static uint8_t reverse_bits[0x100];
}
- (NSDictionary *)metadata {
return [NSDictionary dictionaryByMerging:@{ @"artist": artist, @"albumartist": albumartist, @"album": album, @"title": title, @"genre": genre, @"year": year, @"track": track, @"disc": disc, @"replayGainAlbumGain": @(replayGainAlbumGain), @"replayGainAlbumPeak": @(replayGainAlbumPeak), @"replayGainTrackGain": @(replayGainTrackGain), @"replayGainTrackPeak": @(replayGainTrackPeak), @"albumArt": albumArt } with:id3Metadata];
return [NSDictionary dictionaryByMerging:@{ @"artist": artist, @"albumartist": albumartist, @"album": album, @"title": title, @"genre": genre, @"year": year, @"track": track, @"disc": disc, @"replayGainAlbumGain": @(replayGainAlbumGain), @"replayGainAlbumPeak": @(replayGainAlbumPeak), @"replayGainTrackGain": @(replayGainTrackGain), @"replayGainTrackPeak": @(replayGainTrackPeak), @"volume": @(volumeScale), @"albumArt": albumArt } with:id3Metadata];
}
+ (NSArray *)fileTypes {