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求助: AudioQueue 播放 pcm 流,缓冲区(AudioQueueBufferRef)小于某个值时播放没有声音
laobaozi · 2019-01-13 14:38:23 +08:00 · 4331 次点击这是一个创建于 2176 天前的主题，其中的信息可能已经有所发展或是发生改变。
相关代码如下
//缓冲区个数
const static NSUInteger kQueueBufferNumber = 3;
//配置 AudioStreamBasicDescription
_audioDescription.mBytesPerFrame = 2; //每一个帧包含 2 字节
_audioDescription.mFramesPerPacket = 1;//每一个 packet 一帧数据
_audioDescription.mBytesPerPacket = 2; //每一个 packet 包含 2 个字节的数据
//计算每个缓冲区大小,只有大于 2^15 时播放才有声音
_everyBufferSize = (NSUInteger) pow(_audioDescription.mBytesPerPacket, 15);
for (int i = 0; i < kQueueBufferNumber; i++) {
OSStatus allocResult = AudioQueueAllocateBuffer(_audioQueue, _everyBufferSize, &_audioQueueBuffers[i]);
if (allocResult != noErr) {
NSLog(@"SSTAudioQueuePlayer AudioQueueAllocateBuffer 失败");
return nil;
}
}
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