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/*
* Copyright 2013 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/api/localaudiosource.h"
#include <vector>
#include "webrtc/api/mediaconstraintsinterface.h"
#include "webrtc/media/base/mediaengine.h"
using webrtc::MediaConstraintsInterface;
using webrtc::MediaSourceInterface;
namespace webrtc {
namespace {
// Convert constraints to audio options. Return false if constraints are
// invalid.
void FromConstraints(const MediaConstraintsInterface::Constraints& constraints,
cricket::AudioOptions* options) {
// This design relies on the fact that all the audio constraints are actually
// "options", i.e. boolean-valued and always satisfiable. If the constraints
// are extended to include non-boolean values or actual format constraints,
// a different algorithm will be required.
struct {
const char* name;
rtc::Optional<bool>& value;
} key_to_value[] = {
{MediaConstraintsInterface::kGoogEchoCancellation,
options->echo_cancellation},
{MediaConstraintsInterface::kExtendedFilterEchoCancellation,
options->extended_filter_aec},
{MediaConstraintsInterface::kDAEchoCancellation,
options->delay_agnostic_aec},
{MediaConstraintsInterface::kAutoGainControl, options->auto_gain_control},
{MediaConstraintsInterface::kExperimentalAutoGainControl,
options->experimental_agc},
{MediaConstraintsInterface::kNoiseSuppression,
options->noise_suppression},
{MediaConstraintsInterface::kExperimentalNoiseSuppression,
options->experimental_ns},
{MediaConstraintsInterface::kHighpassFilter, options->highpass_filter},
{MediaConstraintsInterface::kTypingNoiseDetection,
options->typing_detection},
{MediaConstraintsInterface::kAudioMirroring, options->stereo_swapping}
};
for (const auto& constraint : constraints) {
bool value = false;
if (!rtc::FromString(constraint.value, &value))
continue;
for (auto& entry : key_to_value) {
if (constraint.key.compare(entry.name) == 0)
entry.value = rtc::Optional<bool>(value);
}
}
}
} // namespace
rtc::scoped_refptr<LocalAudioSource> LocalAudioSource::Create(
const PeerConnectionFactoryInterface::Options& options,
const MediaConstraintsInterface* constraints) {
rtc::scoped_refptr<LocalAudioSource> source(
new rtc::RefCountedObject<LocalAudioSource>());
source->Initialize(options, constraints);
return source;
}
rtc::scoped_refptr<LocalAudioSource> LocalAudioSource::Create(
const PeerConnectionFactoryInterface::Options& options,
const cricket::AudioOptions* audio_options) {
rtc::scoped_refptr<LocalAudioSource> source(
new rtc::RefCountedObject<LocalAudioSource>());
source->Initialize(options, audio_options);
return source;
}
void LocalAudioSource::Initialize(
const PeerConnectionFactoryInterface::Options& options,
const MediaConstraintsInterface* constraints) {
if (!constraints)
return;
// Apply optional constraints first, they will be overwritten by mandatory
// constraints.
FromConstraints(constraints->GetOptional(), &options_);
cricket::AudioOptions mandatory_options;
FromConstraints(constraints->GetMandatory(), &mandatory_options);
options_.SetAll(mandatory_options);
}
void LocalAudioSource::Initialize(
const PeerConnectionFactoryInterface::Options& options,
const cricket::AudioOptions* audio_options) {
if (!audio_options)
return;
options_ = *audio_options;
}
} // namespace webrtc
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