101 lines
1.7 KiB
Objective-C
101 lines
1.7 KiB
Objective-C
//
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// SilenceDecoder.m
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// Cog
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//
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// Created by Christopher Snowhill on 2/8/15.
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// Copyright 2015 __NoWork, LLC__. All rights reserved.
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//
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#import "SilenceDecoder.h"
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#import "Logging.h"
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#import "PlaylistController.h"
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@implementation SilenceDecoder
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enum { sample_rate = 44100 };
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enum { channels = 2 };
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- (BOOL)open:(id<CogSource>)s {
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[self setSource:s];
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NSString *path = [[[s url] relativeString] substringFromIndex:10];
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int seconds = [path intValue];
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if(!seconds) seconds = 10;
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length = seconds * sample_rate;
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remain = length;
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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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return @{@"bitrate": [NSNumber numberWithInt:0],
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@"sampleRate": [NSNumber numberWithFloat:sample_rate],
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@"totalFrames": [NSNumber numberWithDouble:length],
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@"bitsPerSample": [NSNumber numberWithInt:32],
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@"floatingPoint": [NSNumber numberWithBool:YES],
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@"channels": [NSNumber numberWithInt:channels],
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@"seekable": [NSNumber numberWithBool:YES],
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@"endian": @"host",
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@"encoding": @"synthesized"};
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}
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- (int)readAudio:(void *)buf frames:(UInt32)frames {
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int total = frames;
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if(!IsRepeatOneSet()) {
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if(total > remain)
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total = (int)remain;
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remain -= total;
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}
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memset(buf, 0, sizeof(float) * total * channels);
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return total;
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}
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- (long)seek:(long)frame {
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if(frame > length)
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frame = length;
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remain = length - 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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- (void)setSource:(id<CogSource>)s {
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source = s;
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}
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- (id<CogSource>)source {
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return source;
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}
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+ (NSArray *)fileTypes {
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return @[];
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}
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+ (NSArray *)mimeTypes {
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return @[@"audio/x-silence"];
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}
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+ (float)priority {
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return 1.0;
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}
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+ (NSArray *)fileTypeAssociations {
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return @[];
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}
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@end
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