public static void generateMixPCMData(short[] mixPCMData, int mixDataCount, short channelCount, byte[] dataBuffer, int bufferSize)
{
// 如果单声道,则直接将mDataBuffer的数据拷贝到mMixPCMData中
if (channelCount == 1)
{
for (int i = 0; i < mixDataCount; ++i)
{
byte[] byteData0 = new byte[2];
byteData0[0] = (byte)dataBuffer[2 * i + 0];
byteData0[1] = (byte)dataBuffer[2 * i + 1];
mixPCMData[i] = BinaryUtility.bytesToShort(byteData0);
}
}
// 如果有两个声道,则将左右两个声道的平均值赋值到mMixPCMData中
else if (channelCount == 2)
{
for (int i = 0; i < mixDataCount; ++i)
{
byte[] byteData0 = new byte[2];
byteData0[0] = (byte)dataBuffer[4 * i + 0];
byteData0[1] = (byte)dataBuffer[4 * i + 1];
short shortData0 = BinaryUtility.bytesToShort(byteData0);
byte[] byteData1 = new byte[2];
byteData1[0] = (byte)dataBuffer[4 * i + 2];
byteData1[1] = (byte)dataBuffer[4 * i + 3];
short shortData1 = BinaryUtility.bytesToShort(byteData1);
mixPCMData[i] = (short)((shortData0 + shortData1) * 0.5f);
}
}
}
public void read(ref short value)
{
int readLen = sizeof(short);
if (!readCheck(readLen))
{
return;
}
byte[] dest = BinaryUtility.toBytes(value);
BinaryUtility.memcpy(dest, mBuffer, 0, mIndex, readLen);
value = BinaryUtility.bytesToShort(dest);
mIndex += readLen;
}