ee7aae922d
Audio Chunks now have full timestamp accounting, including DSP playback speed ratio for the one DSP that can change play ratio, Rubber Band. Inputs which support looping and actually reporting the absolute play position now do so. Signed-off-by: Christopher Snowhill <kode54@gmail.com>
122 lines
2 KiB
Objective-C
122 lines
2 KiB
Objective-C
//
|
|
// SilenceDecoder.m
|
|
// Cog
|
|
//
|
|
// Created by Christopher Snowhill on 2/8/15.
|
|
// Copyright 2015 __NoWork, LLC__. All rights reserved.
|
|
//
|
|
|
|
#import "SilenceDecoder.h"
|
|
|
|
#import "Logging.h"
|
|
|
|
#import "PlaylistController.h"
|
|
|
|
@implementation SilenceDecoder
|
|
|
|
enum { sample_rate = 44100 };
|
|
enum { channels = 2 };
|
|
|
|
- (BOOL)open:(id<CogSource>)s {
|
|
[self setSource:s];
|
|
|
|
NSString *path = [[[s url] relativeString] substringFromIndex:10];
|
|
|
|
int seconds = [path intValue];
|
|
if(!seconds) seconds = 10;
|
|
|
|
length = seconds * sample_rate;
|
|
remain = length;
|
|
seconds = 0.0;
|
|
|
|
buffer = (float *) calloc(sizeof(float), 1024 * channels);
|
|
if(!buffer) {
|
|
ALog(@"Out of memory!");
|
|
return NO;
|
|
}
|
|
|
|
[self willChangeValueForKey:@"properties"];
|
|
[self didChangeValueForKey:@"properties"];
|
|
|
|
return YES;
|
|
}
|
|
|
|
- (NSDictionary *)properties {
|
|
return @{ @"bitrate": @(0),
|
|
@"sampleRate": @(sample_rate),
|
|
@"totalFrames": @(length),
|
|
@"bitsPerSample": @(32),
|
|
@"floatingPoint": @(YES),
|
|
@"channels": @(channels),
|
|
@"seekable": @(YES),
|
|
@"endian": @"host",
|
|
@"encoding": @"synthesized" };
|
|
}
|
|
|
|
- (NSDictionary *)metadata {
|
|
return @{};
|
|
}
|
|
|
|
- (AudioChunk *)readAudio {
|
|
int frames = 1024;
|
|
|
|
if(!IsRepeatOneSet()) {
|
|
if(frames > remain)
|
|
frames = (int)remain;
|
|
|
|
remain -= frames;
|
|
}
|
|
|
|
id audioChunkClass = NSClassFromString(@"AudioChunk");
|
|
AudioChunk *chunk = [[audioChunkClass alloc] initWithProperties:[self properties]];
|
|
[chunk setStreamTimestamp:seconds];
|
|
[chunk assignSamples:buffer frameCount:frames];
|
|
|
|
seconds += [chunk duration];
|
|
|
|
return chunk;
|
|
}
|
|
|
|
- (long)seek:(long)frame {
|
|
if(frame > length)
|
|
frame = length;
|
|
|
|
remain = length - frame;
|
|
|
|
seconds = (double)(frame) / sample_rate;
|
|
|
|
return frame;
|
|
}
|
|
|
|
- (void)close {
|
|
}
|
|
|
|
- (void)setSource:(id<CogSource>)s {
|
|
source = s;
|
|
}
|
|
|
|
- (id<CogSource>)source {
|
|
return source;
|
|
}
|
|
|
|
- (BOOL)isSilence {
|
|
return YES;
|
|
}
|
|
|
|
+ (NSArray *)fileTypes {
|
|
return @[];
|
|
}
|
|
|
|
+ (NSArray *)mimeTypes {
|
|
return @[@"audio/x-silence"];
|
|
}
|
|
|
|
+ (float)priority {
|
|
return 1.0;
|
|
}
|
|
|
|
+ (NSArray *)fileTypeAssociations {
|
|
return @[];
|
|
}
|
|
|
|
@end
|