de4703c5d1
Changed the WebRtcVad_Create() function to the more conventional format of returning the handle directly instead of an error code to take care of. In addition NULL was changed to nullptr in the files where it applied. Affected components: * AGC * VAD * NetEQ BUG=441, 3347 TESTED=locally on Linux and trybots R=kwiberg@webrtc.org Review URL: https://webrtc-codereview.appspot.com/51919004 Cr-Commit-Position: refs/heads/master@{#9291}
97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
/*
|
|
* 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/modules/audio_processing/agc/standalone_vad.h"
|
|
|
|
#include <assert.h>
|
|
|
|
#include "webrtc/modules/interface/module_common_types.h"
|
|
#include "webrtc/modules/utility/interface/audio_frame_operations.h"
|
|
#include "webrtc/typedefs.h"
|
|
|
|
namespace webrtc {
|
|
|
|
static const int kDefaultStandaloneVadMode = 3;
|
|
|
|
StandaloneVad::StandaloneVad(VadInst* vad)
|
|
: vad_(vad),
|
|
buffer_(),
|
|
index_(0),
|
|
mode_(kDefaultStandaloneVadMode) {}
|
|
|
|
StandaloneVad::~StandaloneVad() {
|
|
WebRtcVad_Free(vad_);
|
|
}
|
|
|
|
StandaloneVad* StandaloneVad::Create() {
|
|
VadInst* vad = WebRtcVad_Create();
|
|
if (!vad)
|
|
return nullptr;
|
|
|
|
int err = WebRtcVad_Init(vad);
|
|
err |= WebRtcVad_set_mode(vad, kDefaultStandaloneVadMode);
|
|
if (err != 0) {
|
|
WebRtcVad_Free(vad);
|
|
return nullptr;
|
|
}
|
|
return new StandaloneVad(vad);
|
|
}
|
|
|
|
int StandaloneVad::AddAudio(const int16_t* data, int length) {
|
|
if (length != kLength10Ms)
|
|
return -1;
|
|
|
|
if (index_ + length > kLength10Ms * kMaxNum10msFrames)
|
|
// Reset the buffer if it's full.
|
|
// TODO(ajm): Instead, consider just processing every 10 ms frame. Then we
|
|
// can forgo the buffering.
|
|
index_ = 0;
|
|
|
|
memcpy(&buffer_[index_], data, sizeof(int16_t) * length);
|
|
index_ += length;
|
|
return 0;
|
|
}
|
|
|
|
int StandaloneVad::GetActivity(double* p, int length_p) {
|
|
if (index_ == 0)
|
|
return -1;
|
|
|
|
const int num_frames = index_ / kLength10Ms;
|
|
if (num_frames > length_p)
|
|
return -1;
|
|
assert(WebRtcVad_ValidRateAndFrameLength(kSampleRateHz, index_) == 0);
|
|
|
|
int activity = WebRtcVad_Process(vad_, kSampleRateHz, buffer_, index_);
|
|
if (activity < 0)
|
|
return -1;
|
|
else if (activity == 0)
|
|
p[0] = 0.01; // Arbitrary but small and non-zero.
|
|
else
|
|
p[0] = 0.5; // 0.5 is neutral values when combinned by other probabilities.
|
|
for (int n = 1; n < num_frames; n++)
|
|
p[n] = p[0];
|
|
// Reset the buffer to start from the beginning.
|
|
index_ = 0;
|
|
return activity;
|
|
}
|
|
|
|
int StandaloneVad::set_mode(int mode) {
|
|
if (mode < 0 || mode > 3)
|
|
return -1;
|
|
if (WebRtcVad_set_mode(vad_, mode) != 0)
|
|
return -1;
|
|
|
|
mode_ = mode;
|
|
return 0;
|
|
}
|
|
|
|
} // namespace webrtc
|
|
|