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Move the Config DelayCorrection struct to audio_processing.h.

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TBR=bjornv

Review URL: https://webrtc-codereview.appspot.com/2304005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4849 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
andrew@webrtc.org 2013-09-25 23:46:20 +00:00
parent 1760a17b8e
commit 6b1e21924a
3 changed files with 24 additions and 25 deletions
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24
webrtc/modules/audio_processing/echo_cancellation_impl.h
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@ -15,30 +15,6 @@
namespace webrtc {
// Use to enable the delay correction feature. This now engages an extended
// filter mode in the AEC, along with robustness measures around the reported
// system delays. It comes with a significant increase in AEC complexity, but is
// much more robust to unreliable reported delays.
//
// Detailed changes to the algorithm:
// - The filter length is changed from 48 to 128 ms. This comes with tuning of
// several parameters: i) filter adaptation stepsize and error threshold;
// ii) non-linear processing smoothing and overdrive.
// - Option to ignore the reported delays on platforms which we deem
// sufficiently unreliable. See WEBRTC_UNTRUSTED_DELAY in echo_cancellation.c.
// - Faster startup times by removing the excessive "startup phase" processing
// of reported delays.
// - Much more conservative adjustments to the far-end read pointer. We smooth
// the delay difference more heavily, and back off from the difference more.
// Adjustments force a readaptation of the filter, so they should be avoided
// except when really necessary.
struct DelayCorrection {
DelayCorrection() : enabled(false) {}
DelayCorrection(bool enabled) : enabled(enabled) {}
bool enabled;
};
class AudioProcessingImpl;
class AudioBuffer;

1
webrtc/modules/audio_processing/echo_cancellation_impl_unittest.cc
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@ -12,7 +12,6 @@
extern "C" {
#include "webrtc/modules/audio_processing/aec/aec_core.h"
}
#include "webrtc/modules/audio_processing/echo_cancellation_impl.h"
#include "webrtc/modules/audio_processing/include/audio_processing.h"
#include "webrtc/system_wrappers/interface/scoped_ptr.h"

24
webrtc/modules/audio_processing/include/audio_processing.h
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@ -30,6 +30,30 @@ class LevelEstimator;
class NoiseSuppression;
class VoiceDetection;
// Use to enable the delay correction feature. This now engages an extended
// filter mode in the AEC, along with robustness measures around the reported
// system delays. It comes with a significant increase in AEC complexity, but is
// much more robust to unreliable reported delays.
//
// Detailed changes to the algorithm:
// - The filter length is changed from 48 to 128 ms. This comes with tuning of
// several parameters: i) filter adaptation stepsize and error threshold;
// ii) non-linear processing smoothing and overdrive.
// - Option to ignore the reported delays on platforms which we deem
// sufficiently unreliable. See WEBRTC_UNTRUSTED_DELAY in echo_cancellation.c.
// - Faster startup times by removing the excessive "startup phase" processing
// of reported delays.
// - Much more conservative adjustments to the far-end read pointer. We smooth
// the delay difference more heavily, and back off from the difference more.
// Adjustments force a readaptation of the filter, so they should be avoided
// except when really necessary.
struct DelayCorrection {
DelayCorrection() : enabled(false) {}
DelayCorrection(bool enabled) : enabled(enabled) {}
bool enabled;
};
// The Audio Processing Module (APM) provides a collection of voice processing
// components designed for real-time communications software.
//