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Unified Diff: third_party/WebKit/Source/platform/audio/DownSampler.cpp

Issue 2384073002: reflow comments in platform/audio (Closed)
Patch Set: comments (heh!) Created 4 years, 2 months ago
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Index: third_party/WebKit/Source/platform/audio/DownSampler.cpp
diff --git a/third_party/WebKit/Source/platform/audio/DownSampler.cpp b/third_party/WebKit/Source/platform/audio/DownSampler.cpp
index 6abc9dc2831c7ac1affe9e9335a5209cdd548bae..1f2b0e05097914e62962864e3eca93c244adcb5a 100644
--- a/third_party/WebKit/Source/platform/audio/DownSampler.cpp
+++ b/third_party/WebKit/Source/platform/audio/DownSampler.cpp
@@ -56,9 +56,9 @@ void DownSampler::initializeKernel() {
// Half-band filter.
double sincScaleFactor = 0.5;
- // Compute only the odd terms because the even ones are zero, except
- // right in the middle at halfSize, which is 0.5 and we'll handle specially during processing
- // after doing the main convolution using m_reducedKernel.
+ // Compute only the odd terms because the even ones are zero, except right in
+ // the middle at halfSize, which is 0.5 and we'll handle specially during
+ // processing after doing the main convolution using m_reducedKernel.
for (int i = 1; i < n; i += 2) {
// Compute the sinc() with offset.
double s = sincScaleFactor * piDouble * (i - halfSize);
@@ -72,7 +72,8 @@ void DownSampler::initializeKernel() {
// Window the sinc() function.
// Then store only the odd terms in the kernel.
- // In a sense, this is shifting forward in time by one sample-frame at the destination sample-rate.
+ // In a sense, this is shifting forward in time by one sample-frame at the
+ // destination sample-rate.
m_reducedKernel[(i - 1) / 2] = sinc * window;
}
}
@@ -109,20 +110,22 @@ void DownSampler::process(const float* sourceP,
float* inputP = m_inputBuffer.data() + sourceFramesToProcess;
memcpy(inputP, sourceP, sizeof(float) * sourceFramesToProcess);
- // Copy the odd sample-frames from sourceP, delayed by one sample-frame (destination sample-rate)
- // to match shifting forward in time in m_reducedKernel.
+ // Copy the odd sample-frames from sourceP, delayed by one sample-frame
+ // (destination sample-rate) to match shifting forward in time in
+ // m_reducedKernel.
float* oddSamplesP = m_tempBuffer.data();
for (unsigned i = 0; i < destFramesToProcess; ++i)
oddSamplesP[i] = *((inputP - 1) + i * 2);
// Actually process oddSamplesP with m_reducedKernel for efficiency.
- // The theoretical kernel is double this size with 0 values for even terms (except center).
+ // The theoretical kernel is double this size with 0 values for even terms
+ // (except center).
m_convolver.process(&m_reducedKernel, oddSamplesP, destP,
destFramesToProcess);
// Now, account for the 0.5 term right in the middle of the kernel.
- // This amounts to a delay-line of length halfSize (at the source sample-rate),
- // scaled by 0.5.
+ // This amounts to a delay-line of length halfSize (at the source
+ // sample-rate), scaled by 0.5.
// Sum into the destination.
for (unsigned i = 0; i < destFramesToProcess; ++i)
@@ -138,7 +141,8 @@ void DownSampler::reset() {
}
size_t DownSampler::latencyFrames() const {
- // Divide by two since this is a linear phase kernel and the delay is at the center of the kernel.
+ // Divide by two since this is a linear phase kernel and the delay is at the
+ // center of the kernel.
return m_reducedKernel.size() / 2;
}
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