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Bug 1286644: cherry-pick AEC fix from Chromium Issue 576624 r=pkerr

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This commit is contained in:
Randell Jesup 2016-07-13 17:47:00 -04:00
parent c97cce853d
commit ae674679d8
1 changed files with 20 additions and 3 deletions
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23
media/webrtc/trunk/webrtc/modules/audio_processing/utility/delay_estimator.c
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@ -615,16 +615,33 @@ int WebRtc_ProcessBinarySpectrum(BinaryDelayEstimator* self,
((value_best_candidate < self->minimum_probability) ||
(value_best_candidate < self->last_delay_probability)));
if (self->robust_validation_enabled) {
int is_histogram_valid = 0;
// Check for nonstationary farend signal.
int non_stationary_farend = 0;
for (i = 0; i < self->history_size; ++i) {
if (self->farend->far_bit_counts[i] > 0) {
non_stationary_farend = 1;
break;
}
}
if (non_stationary_farend) {
// Only update the validation statistics when the farend is nonstationary
// as the underlying estimates are otherwise frozen.
UpdateRobustValidationStatistics(self, candidate_delay, valley_depth,
value_best_candidate);
}
if (self->robust_validation_enabled) {
int is_histogram_valid = 0;
is_histogram_valid = HistogramBasedValidation(self, candidate_delay);
valid_candidate = RobustValidation(self, candidate_delay, valid_candidate,
is_histogram_valid);
}
if (valid_candidate) {
// Only update the delay estimate when the farend is nonstationary and when
// a valid delay candidate is available.
if (non_stationary_farend && valid_candidate) {
if (candidate_delay != self->last_delay) {
self->last_delay_histogram =
(self->histogram[candidate_delay] > kLastHistogramMax ?