Ask about the "mac pro sound rendering" question

[qidong liang]

Reading the audio_device_mac.cc code of webrtc mac, I don’t understand why this is done? The code is as follows:

if (&& _macBookProPanRight

&& (_playChannels == 2)) {

// Mix entirely into the right channel and zero the left channel.

SInt32 sampleInt32 = 0;

for (uint32_t sampleIdx = 0; sampleIdx < nOutSamples; sampleIdx += 2) {

sampleInt32 = pPlayBuffer[sampleIdx];

sampleInt32 += pPlayBuffer[sampleIdx + 1];

sampleInt32 /= 2;

if (sampleInt32 > 32767) {

sampleInt32 = 32767;

} else if (sampleInt32 < -32768) {

sampleInt32 = -32768;

}

pPlayBuffer[sampleIdx] = 0;

pPlayBuffer[sampleIdx + 1] = static_cast<SInt16>(sampleInt32);

}

}