388 lines
11 KiB
Objective-C
388 lines
11 KiB
Objective-C
//
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// VGMDecoder.m
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// vgmstream
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//
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// Created by Christopher Snowhill on 02/25/14.
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// Copyright 2014 __NoWork, Inc__. All rights reserved.
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//
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#import "VGMDecoder.h"
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#import "VGMInterface.h"
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#import "PlaylistController.h"
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static NSString* get_description_tag(const char* description, const char *tag, char delimiter) {
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// extract a "tag" from the description string
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const char* pos = strstr(description, tag);
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const char* eos = NULL;
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if (pos != NULL) {
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pos += strlen(tag);
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eos = strchr(pos, delimiter);
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if (eos == NULL) eos = pos + strlen(pos);
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NSMutableData* data = [NSData dataWithBytes:pos length:(eos - pos + 1)];
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((char *)[data mutableBytes])[eos - pos] = '\0';
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return [NSString stringWithUTF8String:[data bytes]];
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}
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return nil;
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}
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@implementation VGMInfoCache
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+(id)sharedCache {
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static VGMInfoCache *sharedMyCache = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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sharedMyCache = [[self alloc] init];
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});
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return sharedMyCache;
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}
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-(id)init {
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if (self = [super init]) {
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storage = [[NSMutableDictionary alloc] init];
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}
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return self;
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}
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-(void)stuffURL:(NSURL *)url stream:(VGMSTREAM *)stream {
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vgmstream_cfg_t vcfg = {0};
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vcfg.allow_play_forever = 1;
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vcfg.play_forever = 0;
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vcfg.loop_count = 2;
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vcfg.fade_time = 10;
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vcfg.fade_delay = 0;
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vcfg.ignore_loop = 0;
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vgmstream_apply_config(stream, &vcfg);
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int track_num = [[url fragment] intValue];
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int sampleRate = stream->sample_rate;
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int channels = stream->channels;
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long totalFrames = vgmstream_get_samples(stream);
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int bitrate = get_vgmstream_average_bitrate(stream);
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char description[1024];
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describe_vgmstream(stream, description, 1024);
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NSString * path = [url absoluteString];
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NSRange fragmentRange = [path rangeOfString:@"#" options:NSBackwardsSearch];
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if (fragmentRange.location != NSNotFound) {
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path = [path substringToIndex:fragmentRange.location];
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}
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NSURL *urlTrimmed = [NSURL fileURLWithPath:[path stringByRemovingPercentEncoding]];
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NSURL *folder = [urlTrimmed URLByDeletingLastPathComponent];
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NSURL *tagurl = [folder URLByAppendingPathComponent:@"!tags.m3u" isDirectory:NO];
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NSString *filename = [urlTrimmed lastPathComponent];
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NSString *album = @"";
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NSString *artist = @"";
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NSNumber *year = [NSNumber numberWithInt:0];
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NSNumber *track = [NSNumber numberWithInt:0];
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NSString *title = @"";
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NSString *codec;
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NSNumber *rgTrackGain = [NSNumber numberWithInt:0];
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NSNumber *rgTrackPeak = [NSNumber numberWithInt:0];
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NSNumber *rgAlbumGain = [NSNumber numberWithInt:0];
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NSNumber *rgAlbumPeak = [NSNumber numberWithInt:0];
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codec = get_description_tag(description, "encoding: ", 0);
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STREAMFILE *tagFile = cogsf_create_from_url(tagurl);
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if (tagFile) {
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VGMSTREAM_TAGS *tags;
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const char *tag_key, *tag_val;
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tags = vgmstream_tags_init(&tag_key, &tag_val);
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vgmstream_tags_reset(tags, [filename UTF8String]);
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while (vgmstream_tags_next_tag(tags, tagFile)) {
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NSString *value = [NSString stringWithUTF8String:tag_val];
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if (!strncasecmp(tag_key, "REPLAYGAIN_", strlen("REPLAYGAIN_"))) {
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if (!strncasecmp(tag_key+strlen("REPLAYGAIN_"), "TRACK_", strlen("TRACK_"))) {
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if (!strcasecmp(tag_key+strlen("REPLAYGAIN_TRACK_"), "GAIN")) {
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rgTrackGain = [NSNumber numberWithFloat:[value floatValue]];
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}
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else if (!strcasecmp(tag_key+strlen("REPLAYGAIN_TRACK_"), "PEAK")) {
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rgTrackPeak = [NSNumber numberWithFloat:[value floatValue]];
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}
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}
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else if (!strncasecmp(tag_key+strlen("REPLAYGAIN_"), "ALBUM_", strlen("ALBUM_"))) {
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if (!strcasecmp(tag_key+strlen("REPLAYGAIN_ALBUM_"), "GAIN")) {
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rgAlbumGain = [NSNumber numberWithFloat:[value floatValue]];
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}
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else if (!strcasecmp(tag_key+strlen("REPLAYGAIN_ALBUM_"), "PEAK")) {
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rgAlbumPeak = [NSNumber numberWithFloat:[value floatValue]];
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}
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}
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}
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else if (!strcasecmp(tag_key, "ALBUM")) {
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album = value;
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}
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else if (!strcasecmp(tag_key, "ARTIST")) {
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artist = value;
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}
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else if (!strcasecmp(tag_key, "DATE")) {
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year = [NSNumber numberWithInt:[value intValue]];
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}
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else if (!strcasecmp(tag_key, "TRACK") ||
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!strcasecmp(tag_key, "TRACKNUMBER")) {
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track = [NSNumber numberWithInt:[value intValue]];
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}
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else if (!strcasecmp(tag_key, "TITLE")) {
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title = value;
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}
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}
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vgmstream_tags_close(tags);
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close_streamfile(tagFile);
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}
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NSDictionary * properties =
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[NSDictionary dictionaryWithObjectsAndKeys:
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[NSNumber numberWithInt:bitrate / 1000], @"bitrate",
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[NSNumber numberWithInt:sampleRate], @"sampleRate",
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[NSNumber numberWithDouble:totalFrames], @"totalFrames",
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[NSNumber numberWithInt:16], @"bitsPerSample",
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[NSNumber numberWithBool:NO], @"floatingPoint",
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[NSNumber numberWithInt:channels], @"channels",
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[NSNumber numberWithBool:YES], @"seekable",
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rgAlbumGain, @"replayGainAlbumGain",
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rgAlbumPeak, @"replayGainAlbumPeak",
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rgTrackGain, @"replayGainTrackGain",
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rgTrackPeak, @"replayGainTrackPeak",
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codec, @"codec",
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@"host", @"endian",
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nil];
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if ( [title isEqualToString:@""] ) {
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if ( stream->num_streams > 1 ) {
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title = [NSString stringWithFormat:@"%@ - %s", [[urlTrimmed URLByDeletingPathExtension] lastPathComponent], stream->stream_name];
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} else {
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title = [[urlTrimmed URLByDeletingPathExtension] lastPathComponent];
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}
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}
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if ( [track isEqualToNumber:[NSNumber numberWithInt:0]] )
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track = [NSNumber numberWithInt:track_num];
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NSMutableDictionary * mutableMetadata =
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[NSMutableDictionary dictionaryWithObjectsAndKeys:
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title, @"title",
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track, @"track",
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nil];
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if ( ![album isEqualToString:@""] )
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[mutableMetadata setValue:album forKey:@"album"];
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if ( ![artist isEqualToString:@""] )
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[mutableMetadata setValue:artist forKey:@"artist"];
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if ( ![year isEqualToNumber:[NSNumber numberWithInt:0]] )
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[mutableMetadata setValue:year forKey:@"year"];
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NSDictionary * metadata = mutableMetadata;
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NSDictionary * package =
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[NSDictionary dictionaryWithObjectsAndKeys:
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properties, @"properties",
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metadata, @"metadata",
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nil];
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@synchronized (self) {
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[storage setValue:package forKey:[url absoluteString]];
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}
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}
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-(NSDictionary*)getPropertiesForURL:(NSURL *)url {
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NSDictionary *properties = nil;
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@synchronized (self) {
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NSDictionary * package = [storage objectForKey:[url absoluteString]];
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if (package) {
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properties = [package objectForKey:@"properties"];
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}
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}
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return properties;
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}
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-(NSDictionary*)getMetadataForURL:(NSURL *)url {
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NSDictionary *metadata = nil;
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@synchronized (self) {
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NSDictionary * package = [storage objectForKey:[url absoluteString]];
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if (package) {
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metadata = [package objectForKey:@"metadata"];
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}
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}
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return metadata;
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}
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@end
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@implementation VGMDecoder
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+ (void)initialize
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{
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register_log_callback();
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}
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- (BOOL)open:(id<CogSource>)s
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{
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int track_num = [[[s url] fragment] intValue];
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NSString * path = [[s url] absoluteString];
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NSRange fragmentRange = [path rangeOfString:@"#" options:NSBackwardsSearch];
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if (fragmentRange.location != NSNotFound) {
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path = [path substringToIndex:fragmentRange.location];
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}
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NSLog(@"Opening %@ subsong %d", path, track_num);
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stream = init_vgmstream_from_cogfile([[path stringByRemovingPercentEncoding] UTF8String], track_num);
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if ( !stream )
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return NO;
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vgmstream_mixing_autodownmix(stream, 6);
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canPlayForever = stream->loop_flag;
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if (canPlayForever) {
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playForever = IsRepeatOneSet();
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}
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else {
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playForever = NO;
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}
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vgmstream_cfg_t vcfg = {0};
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vcfg.allow_play_forever = 1;
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vcfg.play_forever = playForever;
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vcfg.loop_count = 2;
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vcfg.fade_time = 10;
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vcfg.fade_delay = 0;
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vcfg.ignore_loop = 0;
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vgmstream_apply_config(stream, &vcfg);
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sampleRate = stream->sample_rate;
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channels = stream->channels;
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totalFrames = vgmstream_get_samples(stream);
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framesRead = 0;
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bitrate = get_vgmstream_average_bitrate(stream);
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[self willChangeValueForKey:@"properties"];
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[self didChangeValueForKey:@"properties"];
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return YES;
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}
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- (NSDictionary *)properties
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{
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return [NSDictionary dictionaryWithObjectsAndKeys:
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[NSNumber numberWithInt:bitrate / 1000], @"bitrate",
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[NSNumber numberWithInt:sampleRate], @"sampleRate",
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[NSNumber numberWithDouble:totalFrames], @"totalFrames",
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[NSNumber numberWithInt:16], @"bitsPerSample",
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[NSNumber numberWithBool:NO], @"floatingPoint",
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[NSNumber numberWithInt:channels], @"channels",
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[NSNumber numberWithBool:YES], @"seekable",
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@"host", @"endian",
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nil];
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}
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- (int)readAudio:(void *)buf frames:(UInt32)frames
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{
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UInt32 framesMax = frames;
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if (canPlayForever) {
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BOOL repeatone = IsRepeatOneSet();
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if (repeatone != playForever) {
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playForever = repeatone;
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vgmstream_set_play_forever(stream, repeatone);
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}
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}
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if (framesRead + frames > totalFrames && !playForever)
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frames = totalFrames - framesRead;
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if (frames > framesMax)
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frames = 0; // integer overflow?
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if (frames) {
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sample * sbuf = (sample *) buf;
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render_vgmstream( sbuf, frames, stream );
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framesRead += frames;
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}
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return frames;
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}
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- (long)seek:(long)frame
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{
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if (canPlayForever) {
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BOOL repeatone = IsRepeatOneSet();
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if (repeatone != playForever) {
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playForever = repeatone;
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vgmstream_set_play_forever(stream, repeatone);
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}
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}
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if (frame > totalFrames)
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frame = totalFrames;
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seek_vgmstream(stream, frame);
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framesRead = frame;
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return frame;
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}
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- (void)close
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{
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close_vgmstream( stream );
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stream = NULL;
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}
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- (void)dealloc
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{
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[self close];
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}
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+ (NSArray *)fileTypes
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{
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NSMutableArray *array = [[NSMutableArray alloc] init];
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size_t count;
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const char ** formats = vgmstream_get_formats(&count);
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for (size_t i = 0; i < count; ++i)
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{
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[array addObject:[NSString stringWithUTF8String:formats[i]]];
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}
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return array;
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}
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+ (NSArray *)mimeTypes
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{
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return nil;
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}
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+ (float)priority
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{
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return 0.0;
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}
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@end
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