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107 lines
3.1 KiB
Objective-C
Executable File
107 lines
3.1 KiB
Objective-C
Executable File
//
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// TDAudioQueueBuffer.m
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// TDAudioStreamer
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//
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// Created by Tony DiPasquale on 10/11/13.
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// Copyright (c) 2013 Tony DiPasquale. The MIT License (MIT).
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//
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#import "TDAudioQueueBuffer.h"
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const NSUInteger kTDMaxPacketDescriptions = 512;
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@interface TDAudioQueueBuffer ()
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@property (assign, nonatomic) AudioQueueBufferRef audioQueueBuffer;
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@property (assign, nonatomic) UInt32 size;
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@property (assign, nonatomic) UInt32 fillPosition;
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@property (assign, nonatomic) AudioStreamPacketDescription *packetDescriptions;
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@property (assign, nonatomic) UInt32 numberOfPacketDescriptions;
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@end
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@implementation TDAudioQueueBuffer
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- (instancetype)initWithAudioQueue:(AudioQueueRef)audioQueue size:(UInt32)size
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{
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self = [super init];
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if (!self) return nil;
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self.size = size;
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self.fillPosition = 0;
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self.packetDescriptions = malloc(sizeof(AudioStreamPacketDescription) * kTDMaxPacketDescriptions);
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self.numberOfPacketDescriptions = 0;
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OSStatus err = AudioQueueAllocateBuffer(audioQueue, self.size, &_audioQueueBuffer);
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if (err) return nil;
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return self;
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}
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- (NSInteger)fillWithData:(const void *)data length:(UInt32)length offset:(UInt32)offset
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{
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if (self.fillPosition + length <= self.size)
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{
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memcpy((char *)(self.audioQueueBuffer->mAudioData + self.fillPosition), (const char *)(data + offset), length);
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self.fillPosition += length;
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}
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else
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{
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NSUInteger availableSpace = self.size - self.fillPosition;
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memcpy((char *)(self.audioQueueBuffer->mAudioData + self.fillPosition), (const char *)data, availableSpace);
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self.fillPosition = self.size;
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return length - availableSpace;
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}
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if (self.fillPosition == self.size) {
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return -1;
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}
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return 0;
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}
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- (BOOL)fillWithData:(const void *)data length:(UInt32)length packetDescription:(AudioStreamPacketDescription)packetDescription
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{
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if (self.fillPosition + packetDescription.mDataByteSize > self.size || self.numberOfPacketDescriptions == kTDMaxPacketDescriptions) return NO;
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memcpy((char *)(self.audioQueueBuffer->mAudioData + self.fillPosition), (const char *)(data + packetDescription.mStartOffset), packetDescription.mDataByteSize);
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self.packetDescriptions[self.numberOfPacketDescriptions] = packetDescription;
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self.packetDescriptions[self.numberOfPacketDescriptions].mStartOffset = self.fillPosition;
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self.numberOfPacketDescriptions++;
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self.fillPosition += packetDescription.mDataByteSize;
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return YES;
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}
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- (void)enqueueWithAudioQueue:(AudioQueueRef)audioQueue
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{
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self.audioQueueBuffer->mAudioDataByteSize = self.fillPosition;
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AudioQueueEnqueueBuffer(audioQueue, self.audioQueueBuffer, self.numberOfPacketDescriptions, self.packetDescriptions);
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}
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- (void)reset
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{
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self.fillPosition = 0;
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self.numberOfPacketDescriptions = 0;
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}
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- (BOOL)isEqual:(AudioQueueBufferRef)audioQueueBuffer
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{
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return audioQueueBuffer == self.audioQueueBuffer;
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}
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- (void)freeFromAudioQueue:(AudioQueueRef)audioQueue
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{
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AudioQueueFreeBuffer(audioQueue, self.audioQueueBuffer);
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}
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- (void)dealloc
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{
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free(_packetDescriptions);
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}
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@end
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