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b=924286 handle non-unit mVolume in BiquadFilterNode r=ehsan

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--HG--
extra : transplant_source : %E5%9E%3E%5D%F2%E5%99%7B%88%DB%21%7D%1C%82%1A.q%26%F0%EA
This commit is contained in:
Karl Tomlinson 2013-10-09 15:33:02 +13:00
parent 75f5a8dca9
commit bca3f10dd4
1 changed files with 15 additions and 8 deletions
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23
content/media/webaudio/BiquadFilterNode.cpp
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@ -25,13 +25,14 @@ NS_INTERFACE_MAP_END_INHERITING(AudioNode)
NS_IMPL_ADDREF_INHERITED(BiquadFilterNode, AudioNode)
NS_IMPL_RELEASE_INHERITED(BiquadFilterNode, AudioNode)
void SetParamsOnBiquad(WebCore::Biquad& aBiquad,
float aSampleRate,
BiquadFilterType aType,
double aFrequency,
double aQ,
double aGain,
double aDetune)
static void
SetParamsOnBiquad(WebCore::Biquad& aBiquad,
float aSampleRate,
BiquadFilterType aType,
double aFrequency,
double aQ,
double aGain,
double aDetune)
{
const double nyquist = aSampleRate * 0.5;
double normalizedFrequency = aFrequency / nyquist;
@ -158,10 +159,16 @@ public:
double gain = mGain.GetValueAtTime(pos);
double detune = mDetune.GetValueAtTime(pos);
float inputBuffer[WEBAUDIO_BLOCK_SIZE];
for (uint32_t i = 0; i < numberOfChannels; ++i) {
auto input = static_cast<const float*>(aInput.mChannelData[i]);
if (aInput.mVolume != 1.0) {
AudioBlockCopyChannelWithScale(input, aInput.mVolume, inputBuffer);
input = inputBuffer;
}
SetParamsOnBiquad(mBiquads[i], aStream->SampleRate(), mType, freq, q, gain, detune);
mBiquads[i].process(static_cast<const float*>(aInput.mChannelData[i]),
mBiquads[i].process(input,
static_cast<float*>(const_cast<void*>(aOutput->mChannelData[i])),
aInput.GetDuration());
}