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AEC3: Add fallback to mono processing if no stereo is detected for some time

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If playout audio is temporarily stereo, the AEC will currently enter stereo processing mode indefinitely. To save CPU and improve AEC performance, this CL adds support for falling back to mono after a period of no stereo.

The feature is enabled by default in the AEC3 config.

Bug: chromium:1295710
Change-Id: I690b5b22f8407f950bf41f3bcaa9ca0138452157
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258421
Reviewed-by: Per Åhgren <peah@webrtc.org>
Commit-Queue: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36502}
This commit is contained in:
Sam Zackrisson
2022-04-08 15:28:45 +02:00
committed by WebRTC LUCI CQ
parent 13fe3674ff
commit fa07b43074
8 changed files with 171 additions and 41 deletions
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1
api/audio/echo_canceller3_config.h
View File

@ -240,6 +240,7 @@ struct RTC_EXPORT EchoCanceller3Config {
struct MultiChannel {
bool detect_stereo_content = true;
float stereo_detection_threshold = 0.0f;
int stereo_detection_timeout_threshold_seconds = 300;
} multi_channel;
};
} // namespace webrtc

6
api/audio/echo_canceller3_config_json.cc
View File

@ -421,6 +421,8 @@ void Aec3ConfigFromJsonString(absl::string_view json_string,
&cfg.multi_channel.detect_stereo_content);
ReadParam(section, "stereo_detection_threshold",
&cfg.multi_channel.stereo_detection_threshold);
ReadParam(section, "stereo_detection_timeout_threshold_seconds",
&cfg.multi_channel.stereo_detection_timeout_threshold_seconds);
}
}
@ -750,7 +752,9 @@ std::string Aec3ConfigToJsonString(const EchoCanceller3Config& config) {
ost << "\"detect_stereo_content\": "
<< (config.multi_channel.detect_stereo_content ? "true" : "false") << ",";
ost << "\"stereo_detection_threshold\": "
<< config.multi_channel.stereo_detection_threshold;
<< config.multi_channel.stereo_detection_threshold << ",";
ost << "\"stereo_detection_timeout_threshold_seconds\": "
<< config.multi_channel.stereo_detection_timeout_threshold_seconds;
ost << "}";
ost << "}";

7
api/audio/test/echo_canceller3_config_json_unittest.cc
View File

@ -33,8 +33,8 @@ TEST(EchoCanceller3JsonHelpers, ToStringAndParseJson) {
cfg.suppressor.subband_nearend_detection.snr_threshold = 100.f;
cfg.multi_channel.detect_stereo_content =
!cfg.multi_channel.detect_stereo_content;
cfg.multi_channel.stereo_detection_threshold =
cfg.multi_channel.stereo_detection_threshold + 1.0f;
cfg.multi_channel.stereo_detection_threshold += 1.0f;
cfg.multi_channel.stereo_detection_timeout_threshold_seconds += 1;
std::string json_string = Aec3ConfigToJsonString(cfg);
EchoCanceller3Config cfg_transformed = Aec3ConfigFromJsonString(json_string);
@ -83,5 +83,8 @@ TEST(EchoCanceller3JsonHelpers, ToStringAndParseJson) {
cfg_transformed.multi_channel.detect_stereo_content);
EXPECT_EQ(cfg.multi_channel.stereo_detection_threshold,
cfg_transformed.multi_channel.stereo_detection_threshold);
EXPECT_EQ(
cfg.multi_channel.stereo_detection_timeout_threshold_seconds,
cfg_transformed.multi_channel.stereo_detection_timeout_threshold_seconds);
}
} // namespace webrtc