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AEC3: Make RenderSignalAnalyzer multi-channel

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In this CL:
 - Render signal analyzer considers a frequency bin a narrow band
(peak) if any channel exhibits narrowband (-peak) behavior.
 - The unit tests have to fill frames with noise because small
inaccuracies in the FFT spectrum lead to consistent "narrow bands"
despite spectrum being essentially flat.

Bug: webrtc:10913
Change-Id: I8fa181412c0ee1beeacfda37ffef18251d5f0cd7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/151912
Reviewed-by: Per Åhgren <peah@webrtc.org>
Commit-Queue: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29176}
This commit is contained in:
Sam Zackrisson
2019-09-12 12:32:44 +02:00
committed by Commit Bot
parent b5a4ae8a57
commit 3f17221d98
5 changed files with 178 additions and 111 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
modules/audio_processing/test/echo_canceller_test_tools.cc
View File

@ -15,8 +15,15 @@
namespace webrtc {
void RandomizeSampleVector(Random* random_generator, rtc::ArrayView<float> v) {
RandomizeSampleVector(random_generator, v,
/*amplitude=*/32767.f);
}
void RandomizeSampleVector(Random* random_generator,
rtc::ArrayView<float> v,
float amplitude) {
for (auto& v_k : v) {
v_k = 2 * 32767.f * random_generator->Rand<float>() - 32767.f;
v_k = 2 * amplitude * random_generator->Rand<float>() - amplitude;
}
}

5
modules/audio_processing/test/echo_canceller_test_tools.h
View File

@ -23,6 +23,11 @@ namespace webrtc {
// Randomizes the elements in a vector with values -32767.f:32767.f.
void RandomizeSampleVector(Random* random_generator, rtc::ArrayView<float> v);
// Randomizes the elements in a vector with values -amplitude:amplitude.
void RandomizeSampleVector(Random* random_generator,
rtc::ArrayView<float> v,
float amplitude);
// Class for delaying a signal a fixed number of samples.
template <typename T>
class DelayBuffer {

11
modules/audio_processing/test/echo_canceller_test_tools_unittest.cc
View File

@ -68,4 +68,15 @@ TEST(EchoCancellerTestTools, RandomizeSampleVector) {
EXPECT_NE(v, v_ref);
}
TEST(EchoCancellerTestTools, RandomizeSampleVectorWithAmplitude) {
Random random_generator(42U);
std::vector<float> v(50, 0.f);
RandomizeSampleVector(&random_generator, v, 1000.f);
EXPECT_GE(1000.f, *std::max_element(v.begin(), v.end()));
EXPECT_LE(-1000.f, *std::min_element(v.begin(), v.end()));
RandomizeSampleVector(&random_generator, v, 100.f);
EXPECT_GE(100.f, *std::max_element(v.begin(), v.end()));
EXPECT_LE(-100.f, *std::min_element(v.begin(), v.end()));
}
} // namespace webrtc