我正在寻找修改aurioTouch以将通过麦克风录制的录音保存为以后可以使用AVAudioPlayer播放的文件格式。但我对如何使用来自数据缓冲区的PCM数据创建此文件感到有点迷茫。例如,在PerformThru中,我也保存到保存缓冲区:
SInt8 *data_ptr = (SInt8 *)(ioData->mBuffers[0].mData);
NSString * s = [NSString stringWithFormat:@"%d", data_ptr[2]];
for (i=0; i<inNumberFrames; i++)
{
if ((i+drawBufferIdx) >= drawBufferLen)
{
//cycleOscilloscopeLines();
drawBufferIdx = -i;
}
drawBuffers[0][i + drawBufferIdx] = data_ptr[2];
if ( saveBuffer ) { saveBuffer[ saveBufferIdx++ ] = ( data_ptr[ 2 ] ); }
data_ptr += 4;
}
稍后我将saveBuffer写入文件
std::ofstream bufferOut;
bufferOut.open( "myaudio.wav" );
for ( UInt64 i = 0; i < saveBufferIdx; i++ )
{
bufferOut << saveBuffer[ i ];
}
bufferOut.close();
free( saveBuffer );
这肯定是错误的(不玩)。有谁知道如何捕获PCM并正确保存到文件中?