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fix(audio): apply gain to both audio channels

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Fix #5039
This commit is contained in:
Anthony Bilinski 2018-04-09 22:51:09 -07:00
parent 5d0f9509a8
commit f6622e4092
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GPG Key ID: 2AA8E0DA1B31FB3C
1 changed files with 5 additions and 5 deletions
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10
src/audio/backend/openal.cpp
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@ -313,7 +313,9 @@ bool OpenAL::initInput(const QString& deviceName, uint32_t channels)
int stereoFlag = channels == 1 ? AL_FORMAT_MONO16 : AL_FORMAT_STEREO16;
const uint32_t sampleRate = AUDIO_SAMPLE_RATE;
const uint16_t frameDuration = AUDIO_FRAME_DURATION;
const ALCsizei bufSize = (frameDuration * sampleRate * 4) / 1000 * channels;
const int bytesPerSample = 2;
const int safetyFactor = 2;
const ALCsizei bufSize = AUDIO_FRAME_SAMPLE_COUNT * channels * bytesPerSample * safetyFactor;
const QByteArray qDevName = deviceName.toUtf8();
const ALchar* tmpDevName = qDevName.isEmpty() ? nullptr : qDevName.constData();
@ -585,13 +587,11 @@ void OpenAL::doInput()
return;
}
for (quint32 i = 0; i < AUDIO_FRAME_SAMPLE_COUNT; ++i) {
for (quint32 i = 0; i < AUDIO_FRAME_SAMPLE_COUNT * channels; ++i) {
// gain amplification with clipping to 16-bit boundaries
int ampPCM = qBound<int>(std::numeric_limits<int16_t>::min(),
inputBuffer[i] = qBound<int16_t>(std::numeric_limits<int16_t>::min(),
qRound(inputBuffer[i] * OpenAL::inputGainFactor()),
std::numeric_limits<int16_t>::max());
inputBuffer[i] = static_cast<int16_t>(ampPCM);
}
emit Audio::frameAvailable(inputBuffer, AUDIO_FRAME_SAMPLE_COUNT, channels, AUDIO_SAMPLE_RATE);