62edb39761
Rewrite attempt number two. Now using array lists of audio chunks, with each chunk having its format and optionally losslessness stashed along with it. This replaces the old virtual ring buffer method. As a result of this, the HRIR toggle now works instantaneously. Signed-off-by: Christopher Snowhill <kode54@gmail.com>
96 lines
2 KiB
Objective-C
96 lines
2 KiB
Objective-C
//
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// ChunkList.m
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// CogAudio Framework
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//
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// Created by Christopher Snowhill on 2/5/22.
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//
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#import "ChunkList.h"
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@implementation ChunkList
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@synthesize listDuration;
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@synthesize maxDuration;
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- (id) initWithMaximumDuration:(double)duration {
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self = [super init];
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if (self) {
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chunkList = [[NSMutableArray alloc] init];
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listDuration = 0.0;
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maxDuration = duration;
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inAdder = NO;
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inRemover = NO;
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stopping = NO;
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}
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return self;
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}
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- (void) dealloc {
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stopping = YES;
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while (inAdder || inRemover) {
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usleep(500);
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}
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}
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- (void) reset {
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@synchronized (chunkList) {
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[chunkList removeAllObjects];
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listDuration = 0.0;
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}
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}
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- (BOOL) isEmpty {
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@synchronized (chunkList) {
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return [chunkList count] == 0;
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}
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}
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- (BOOL) isFull {
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return listDuration >= maxDuration;
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}
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- (void) addChunk:(AudioChunk *)chunk {
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if (stopping) return;
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inAdder = YES;
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const double chunkDuration = [chunk duration];
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@synchronized(chunkList) {
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[chunkList addObject:chunk];
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listDuration += chunkDuration;
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}
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inAdder = NO;
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}
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- (AudioChunk *) removeSamples:(size_t)maxFrameCount {
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if (stopping) {
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return [[AudioChunk alloc] init];
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}
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@synchronized (chunkList) {
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inRemover = YES;
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if (![chunkList count])
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return [[AudioChunk alloc] init];
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AudioChunk * chunk = [chunkList objectAtIndex:0];
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if ([chunk frameCount] <= maxFrameCount) {
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[chunkList removeObjectAtIndex:0];
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listDuration -= [chunk duration];
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inRemover = NO;
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return chunk;
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}
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NSData * removedData = [chunk removeSamples:maxFrameCount];
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AudioChunk * ret = [[AudioChunk alloc] init];
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[ret setFormat:[chunk format]];
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[ret assignSamples:[removedData bytes] frameCount:maxFrameCount];
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listDuration -= [ret duration];
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inRemover = NO;
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return ret;
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}
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}
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@end
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