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/*
* 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/noise_suppression_impl.h"
#include <assert.h>
#include "webrtc/modules/audio_processing/audio_buffer.h"
#if defined(WEBRTC_NS_FLOAT)
#include "webrtc/modules/audio_processing/ns/include/noise_suppression.h"
#elif defined(WEBRTC_NS_FIXED)
#include "webrtc/modules/audio_processing/ns/include/noise_suppression_x.h"
#endif
#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
namespace webrtc {
#if defined(WEBRTC_NS_FLOAT)
typedef NsHandle Handle;
#elif defined(WEBRTC_NS_FIXED)
typedef NsxHandle Handle;
#endif
namespace {
int MapSetting(NoiseSuppression::Level level) {
switch (level) {
case NoiseSuppression::kLow:
return 0;
case NoiseSuppression::kModerate:
return 1;
case NoiseSuppression::kHigh:
return 2;
case NoiseSuppression::kVeryHigh:
return 3;
}
assert(false);
return -1;
}
} // namespace
NoiseSuppressionImpl::NoiseSuppressionImpl(const AudioProcessing* apm,
CriticalSectionWrapper* crit)
: ProcessingComponent(),
apm_(apm),
crit_(crit),
level_(kModerate) {}
NoiseSuppressionImpl::~NoiseSuppressionImpl() {}
int NoiseSuppressionImpl::AnalyzeCaptureAudio(AudioBuffer* audio) {
#if defined(WEBRTC_NS_FLOAT)
if (!is_component_enabled()) {
return apm_->kNoError;
}
assert(audio->samples_per_split_channel() <= 160);
assert(audio->num_channels() == num_handles());
for (int i = 0; i < num_handles(); ++i) {
Handle* my_handle = static_cast<Handle*>(handle(i));
WebRtcNs_Analyze(my_handle, audio->split_bands_const_f(i)[kBand0To8kHz]);
}
#endif
return apm_->kNoError;
}
int NoiseSuppressionImpl::ProcessCaptureAudio(AudioBuffer* audio) {
if (!is_component_enabled()) {
return apm_->kNoError;
}
assert(audio->samples_per_split_channel() <= 160);
assert(audio->num_channels() == num_handles());
for (int i = 0; i < num_handles(); ++i) {
Handle* my_handle = static_cast<Handle*>(handle(i));
#if defined(WEBRTC_NS_FLOAT)
WebRtcNs_Process(my_handle,
audio->split_bands_const_f(i),
audio->num_bands(),
audio->split_bands_f(i));
#elif defined(WEBRTC_NS_FIXED)
WebRtcNsx_Process(my_handle,
audio->split_bands_const(i),
audio->num_bands(),
audio->split_bands(i));
#endif
}
return apm_->kNoError;
}
int NoiseSuppressionImpl::Enable(bool enable) {
CriticalSectionScoped crit_scoped(crit_);
return EnableComponent(enable);
}
bool NoiseSuppressionImpl::is_enabled() const {
return is_component_enabled();
}
int NoiseSuppressionImpl::set_level(Level level) {
CriticalSectionScoped crit_scoped(crit_);
if (MapSetting(level) == -1) {
return apm_->kBadParameterError;
}
level_ = level;
return Configure();
}
NoiseSuppression::Level NoiseSuppressionImpl::level() const {
return level_;
}
float NoiseSuppressionImpl::speech_probability() const {
#if defined(WEBRTC_NS_FLOAT)
float probability_average = 0.0f;
for (int i = 0; i < num_handles(); i++) {
Handle* my_handle = static_cast<Handle*>(handle(i));
probability_average += WebRtcNs_prior_speech_probability(my_handle);
}
return probability_average / num_handles();
#elif defined(WEBRTC_NS_FIXED)
// Currently not available for the fixed point implementation.
return apm_->kUnsupportedFunctionError;
#endif
}
void* NoiseSuppressionImpl::CreateHandle() const {
Handle* handle = NULL;
#if defined(WEBRTC_NS_FLOAT)
if (WebRtcNs_Create(&handle) != apm_->kNoError)
#elif defined(WEBRTC_NS_FIXED)
if (WebRtcNsx_Create(&handle) != apm_->kNoError)
#endif
{
handle = NULL;
} else {
assert(handle != NULL);
}
return handle;
}
void NoiseSuppressionImpl::DestroyHandle(void* handle) const {
#if defined(WEBRTC_NS_FLOAT)
WebRtcNs_Free(static_cast<Handle*>(handle));
#elif defined(WEBRTC_NS_FIXED)
WebRtcNsx_Free(static_cast<Handle*>(handle));
#endif
}
int NoiseSuppressionImpl::InitializeHandle(void* handle) const {
#if defined(WEBRTC_NS_FLOAT)
return WebRtcNs_Init(static_cast<Handle*>(handle),
apm_->proc_sample_rate_hz());
#elif defined(WEBRTC_NS_FIXED)
return WebRtcNsx_Init(static_cast<Handle*>(handle),
apm_->proc_sample_rate_hz());
#endif
}
int NoiseSuppressionImpl::ConfigureHandle(void* handle) const {
#if defined(WEBRTC_NS_FLOAT)
return WebRtcNs_set_policy(static_cast<Handle*>(handle),
MapSetting(level_));
#elif defined(WEBRTC_NS_FIXED)
return WebRtcNsx_set_policy(static_cast<Handle*>(handle),
MapSetting(level_));
#endif
}
int NoiseSuppressionImpl::num_handles_required() const {
return apm_->num_output_channels();
}
int NoiseSuppressionImpl::GetHandleError(void* handle) const {
// The NS has no get_error() function.
assert(handle != NULL);
return apm_->kUnspecifiedError;
}
} // namespace webrtc
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