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Optimize the three band filter bank.

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Reducing pointer following. This will allow the compiler to optimize more efficiently with the "-fno-strict-aliasing" flag.

Bug: None
Change-Id: I8e2d841fa543b28c59eb08c654a2b0515ab39d69
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/241780
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Commit-Queue: Christian Schuldt <cschuldt@google.com>
Cr-Commit-Position: refs/heads/main@{#35548}
This commit is contained in:
cschuldt
2021-12-16 09:01:54 +01:00
committed by WebRTC LUCI CQ
parent 8d87c463d9
commit 4b92af786e
1 changed files with 4 additions and 2 deletions
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6
modules/audio_processing/three_band_filter_bank.cc
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@ -211,8 +211,9 @@ void ThreeBandFilterBank::Analysis(
// Band and modulate the output.
for (int band = 0; band < ThreeBandFilterBank::kNumBands; ++band) {
float* out_band = out[band].data();
for (int n = 0; n < kSplitBandSize; ++n) {
out[band][n] += dct_modulation[band] * out_subsampled[n];
out_band[n] += dct_modulation[band] * out_subsampled[n];
}
}
}
@ -254,8 +255,9 @@ void ThreeBandFilterBank::Synthesis(
std::fill(in_subsampled.begin(), in_subsampled.end(), 0.f);
for (int band = 0; band < ThreeBandFilterBank::kNumBands; ++band) {
RTC_DCHECK_EQ(in[band].size(), kSplitBandSize);
const float* in_band = in[band].data();
for (int n = 0; n < kSplitBandSize; ++n) {
in_subsampled[n] += dct_modulation[band] * in[band][n];
in_subsampled[n] += dct_modulation[band] * in_band[n];
}
}