blob: c502184aeaa80f893bd35056927147fd487be163 [file] [log] [blame]
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/modules/audio_processing/vad/common.h"
#include "webrtc/modules/audio_processing/vad/gmm.h"
#include "webrtc/typedefs.h"
namespace webrtc {
class AudioFrame;
class VadCircularBuffer;
// Computes the probability of the input audio frame to be active given
// the corresponding pitch-gain and lag of the frame.
class PitchBasedVad {
// Compute pitch-based voicing probability, given the features.
// features: a structure containing features required for computing voicing
// probabilities.
// p_combined: an array which contains the combined activity probabilities
// computed prior to the call of this function. The method,
// then, computes the voicing probabilities and combine them
// with the given values. The result are returned in |p|.
int VoicingProbability(const AudioFeatures& features, double* p_combined);
int UpdatePrior(double p);
// TODO(turajs): maybe defining this at a higher level (maybe enum) so that
// all the code recognize it as "no-error."
static const int kNoError = 0;
GmmParameters noise_gmm_;
GmmParameters voice_gmm_;
double p_prior_;
rtc::scoped_ptr<VadCircularBuffer> circular_buffer_;
} // namespace webrtc