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/*
* Copyright (c) 2015 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 "audio/audio_state.h"
#include <algorithm>
#include <utility>
#include <vector>
#include "audio/audio_receive_stream.h"
#include "modules/audio_device/include/audio_device.h"
#include "rtc_base/atomicops.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "rtc_base/ptr_util.h"
#include "rtc_base/thread.h"
namespace webrtc {
namespace internal {
AudioState::AudioState(const AudioState::Config& config)
: config_(config),
audio_transport_(config_.audio_mixer, config_.audio_processing.get()) {
process_thread_checker_.DetachFromThread();
RTC_DCHECK(config_.audio_mixer);
RTC_DCHECK(config_.audio_device_module);
}
AudioState::~AudioState() {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
RTC_DCHECK(receiving_streams_.empty());
RTC_DCHECK(sending_streams_.empty());
}
bool AudioState::typing_noise_detected() const {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
return audio_transport_.typing_noise_detected();
}
void AudioState::AddReceivingStream(webrtc::AudioReceiveStream* stream) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
RTC_DCHECK_EQ(0, receiving_streams_.count(stream));
receiving_streams_.insert(stream);
if (!config_.audio_mixer->AddSource(
static_cast<internal::AudioReceiveStream*>(stream))) {
RTC_DLOG(LS_ERROR) << "Failed to add source to mixer.";
}
// Make sure playback is initialized; start playing if enabled.
auto* adm = config_.audio_device_module.get();
if (!adm->Playing()) {
if (adm->InitPlayout() == 0) {
if (playout_enabled_) {
adm->StartPlayout();
}
} else {
RTC_DLOG_F(LS_ERROR) << "Failed to initialize playout.";
}
}
}
void AudioState::RemoveReceivingStream(webrtc::AudioReceiveStream* stream) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
auto count = receiving_streams_.erase(stream);
RTC_DCHECK_EQ(1, count);
config_.audio_mixer->RemoveSource(
static_cast<internal::AudioReceiveStream*>(stream));
if (receiving_streams_.empty()) {
config_.audio_device_module->StopPlayout();
}
}
void AudioState::AddSendingStream(webrtc::AudioSendStream* stream,
int sample_rate_hz,
size_t num_channels) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
auto& properties = sending_streams_[stream];
properties.sample_rate_hz = sample_rate_hz;
properties.num_channels = num_channels;
UpdateAudioTransportWithSendingStreams();
// Make sure recording is initialized; start recording if enabled.
auto* adm = config_.audio_device_module.get();
if (!adm->Recording()) {
if (adm->InitRecording() == 0) {
if (recording_enabled_) {
adm->StartRecording();
}
} else {
RTC_DLOG_F(LS_ERROR) << "Failed to initialize recording.";
}
}
}
void AudioState::RemoveSendingStream(webrtc::AudioSendStream* stream) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
auto count = sending_streams_.erase(stream);
RTC_DCHECK_EQ(1, count);
UpdateAudioTransportWithSendingStreams();
if (sending_streams_.empty()) {
config_.audio_device_module->StopRecording();
}
}
void AudioState::SetPlayout(bool enabled) {
RTC_LOG(INFO) << "SetPlayout(" << enabled << ")";
RTC_DCHECK(thread_checker_.CalledOnValidThread());
if (playout_enabled_ != enabled) {
playout_enabled_ = enabled;
if (enabled) {
null_audio_poller_.reset();
if (!receiving_streams_.empty()) {
config_.audio_device_module->StartPlayout();
}
} else {
config_.audio_device_module->StopPlayout();
null_audio_poller_ = rtc::MakeUnique<NullAudioPoller>(&audio_transport_);
}
}
}
void AudioState::SetRecording(bool enabled) {
RTC_LOG(INFO) << "SetRecording(" << enabled << ")";
RTC_DCHECK(thread_checker_.CalledOnValidThread());
if (recording_enabled_ != enabled) {
recording_enabled_ = enabled;
if (enabled) {
if (!sending_streams_.empty()) {
config_.audio_device_module->StartRecording();
}
} else {
config_.audio_device_module->StopRecording();
}
}
}
AudioState::Stats AudioState::GetAudioInputStats() const {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
const voe::AudioLevel& audio_level = audio_transport_.audio_level();
Stats result;
result.audio_level = audio_level.LevelFullRange();
RTC_DCHECK_LE(0, result.audio_level);
RTC_DCHECK_GE(32767, result.audio_level);
result.total_energy = audio_level.TotalEnergy();
result.total_duration = audio_level.TotalDuration();
return result;
}
void AudioState::SetStereoChannelSwapping(bool enable) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
audio_transport_.SetStereoChannelSwapping(enable);
}
// Reference count; implementation copied from rtc::RefCountedObject.
void AudioState::AddRef() const {
rtc::AtomicOps::Increment(&ref_count_);
}
// Reference count; implementation copied from rtc::RefCountedObject.
rtc::RefCountReleaseStatus AudioState::Release() const {
if (rtc::AtomicOps::Decrement(&ref_count_) == 0) {
delete this;
return rtc::RefCountReleaseStatus::kDroppedLastRef;
}
return rtc::RefCountReleaseStatus::kOtherRefsRemained;
}
void AudioState::UpdateAudioTransportWithSendingStreams() {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
std::vector<webrtc::AudioSendStream*> sending_streams;
int max_sample_rate_hz = 8000;
size_t max_num_channels = 1;
for (const auto& kv : sending_streams_) {
sending_streams.push_back(kv.first);
max_sample_rate_hz = std::max(max_sample_rate_hz, kv.second.sample_rate_hz);
max_num_channels = std::max(max_num_channels, kv.second.num_channels);
}
audio_transport_.UpdateSendingStreams(std::move(sending_streams),
max_sample_rate_hz, max_num_channels);
}
} // namespace internal
rtc::scoped_refptr<AudioState> AudioState::Create(
const AudioState::Config& config) {
return rtc::scoped_refptr<AudioState>(new internal::AudioState(config));
}
} // namespace webrtc