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/*
* libjingle
* Copyright 2013 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "talk/app/webrtc/localaudiosource.h"
#include <vector>
#include "talk/app/webrtc/mediaconstraintsinterface.h"
#include "talk/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},
{MediaConstraintsInterface::kAecDump, options->aec_dump}
};
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;
}
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);
source_state_ = kLive;
}
} // namespace webrtc
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