Swift中的AudioBufferList
Swift中的AudioBufferList
提问于 2014-11-09 14:03:16
我正在尝试将以下代码转换为Swift：
CMSampleBufferRef sampleBuffer = [assetOutput copyNextSampleBuffer];
CMBlockBufferRef blockBuffer;
AudioBufferList audioBufferList;
CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer(sampleBuffer, NULL, &audioBufferList, sizeof(AudioBufferList), NULL, NULL, kCMSampleBufferFlag_AudioBufferList_Assure16ByteAlignment, &blockBuffer);
for (NSUInteger i = 0; i < audioBufferList.mNumberBuffers; i++) {
AudioBuffer audioBuffer = audioBufferList.mBuffers[i];
[audioStream writeData:audioBuffer.mData maxLength:audioBuffer.mDataByteSize];
}
CFRelease(blockBuffer);
CFRelease(sampleBuffer);不管我怎么尝试，似乎都不能遍历audioBuffer列表。有谁有答案吗？
Stack Overflow用户
发布于 2017-07-12 20:14:40
Swift-3中的代码转换
var sampleBuffer: CMSampleBuffer? = assetOutput.copyNextSampleBuffer()
let audioStream = OutputStream()
var blockBuffer: CMBlockBuffer?
var audioBufferList = AudioBufferList()
CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer(sampleBuffer, nil, &audioBufferList, MemoryLayout<AudioBufferList>.size, nil, nil, kCMSampleBufferFlag_AudioBufferList_Assure16ByteAlignment, &blockBuffer)
let buffers = UnsafeBufferPointer<AudioBuffer>(start: &audioBufferList.mBuffers, count: Int(audioBufferList.mNumberBuffers))
for audioBuffer in buffers {
let frame = audioBuffer.mData?.assumingMemoryBound(to: UInt8.self)
audioStream.write(frame!, maxLength: Int(audioBuffer.mDataByteSize))
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/26825498
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