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AEC3: Fix filter output transition when input and output is the same array

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This CL fixes a bug in the filter output transition when the 'from' input
points to the same array as the output. It also includes a slight
improvement to the transition by starting one sample earlier than
previously.

Bug: webrtc:9741,chromium:882789
Change-Id: Ifd5f16c1ac88a74d93499e7f4b4c0e5cb3e4976f
Reviewed-on: https://webrtc-review.googlesource.com/99540
Reviewed-by: Per Åhgren <peah@webrtc.org>
Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24683}
This commit is contained in:
Gustaf Ullberg
2018-09-11 12:55:23 +02:00
committed by Commit Bot
parent 7255fef258
commit ddb82a6b5f
1 changed files with 3 additions and 3 deletions
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6
modules/audio_processing/aec3/echo_remover.cc
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@ -62,15 +62,15 @@ void SignalTransition(rtc::ArrayView<const float> from,
rtc::ArrayView<const float> to,
rtc::ArrayView<float> out) {
constexpr size_t kTransitionSize = 30;
constexpr float kOneByTransitionSize = 1.f / kTransitionSize;
constexpr float kOneByTransitionSizePlusOne = 1.f / (kTransitionSize + 1);
RTC_DCHECK_EQ(from.size(), to.size());
RTC_DCHECK_EQ(from.size(), out.size());
RTC_DCHECK_LE(kTransitionSize, out.size());
for (size_t k = 0; k < kTransitionSize; ++k) {
out[k] = k * kOneByTransitionSize * to[k];
out[k] += (kTransitionSize - k) * kOneByTransitionSize * from[k];
float a = (k + 1) * kOneByTransitionSizePlusOne;
out[k] = a * to[k] + (1.f - a) * from[k];
}
std::copy(to.begin() + kTransitionSize, to.end(),