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/*
* libjingle
* Copyright 2004--2011 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/audiotrack.h"
#include "webrtc/base/checks.h"
using rtc::scoped_refptr;
namespace webrtc {
const char MediaStreamTrackInterface::kAudioKind[] = "audio";
// static
scoped_refptr<AudioTrack> AudioTrack::Create(
const std::string& id,
const scoped_refptr<AudioSourceInterface>& source) {
return new rtc::RefCountedObject<AudioTrack>(id, source);
}
AudioTrack::AudioTrack(const std::string& label,
const scoped_refptr<AudioSourceInterface>& source)
: MediaStreamTrack<AudioTrackInterface>(label), audio_source_(source) {
if (audio_source_) {
audio_source_->RegisterObserver(this);
OnChanged();
}
}
AudioTrack::~AudioTrack() {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
set_state(MediaStreamTrackInterface::kEnded);
if (audio_source_)
audio_source_->UnregisterObserver(this);
}
std::string AudioTrack::kind() const {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
return kAudioKind;
}
AudioSourceInterface* AudioTrack::GetSource() const {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
return audio_source_.get();
}
void AudioTrack::AddSink(AudioTrackSinkInterface* sink) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
if (audio_source_)
audio_source_->AddSink(sink);
}
void AudioTrack::RemoveSink(AudioTrackSinkInterface* sink) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
if (audio_source_)
audio_source_->RemoveSink(sink);
}
void AudioTrack::OnChanged() {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
if (state() == kFailed)
return; // We can't recover from this state (do we ever set it?).
TrackState new_state = kInitializing;
// |audio_source_| must be non-null if we ever get here.
switch (audio_source_->state()) {
case MediaSourceInterface::kLive:
case MediaSourceInterface::kMuted:
new_state = kLive;
break;
case MediaSourceInterface::kEnded:
new_state = kEnded;
break;
case MediaSourceInterface::kInitializing:
default:
// use kInitializing.
break;
}
set_state(new_state);
}
} // namespace webrtc
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