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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/fake_audio_renderer_sink.h"
#include "base/logging.h"
namespace media {
FakeAudioRendererSink::FakeAudioRendererSink()
: state_(kUninitialized),
callback_(NULL) {
}
FakeAudioRendererSink::~FakeAudioRendererSink() {
DCHECK(!callback_);
}
void FakeAudioRendererSink::Initialize(const AudioParameters& params,
RenderCallback* callback) {
DCHECK_EQ(state_, kUninitialized);
DCHECK(!callback_);
DCHECK(callback);
callback_ = callback;
ChangeState(kInitialized);
}
void FakeAudioRendererSink::Start() {
DCHECK_EQ(state_, kInitialized);
ChangeState(kStarted);
}
void FakeAudioRendererSink::Stop() {
callback_ = NULL;
ChangeState(kStopped);
}
void FakeAudioRendererSink::Pause() {
DCHECK(state_ == kStarted || state_ == kPlaying) << "state_ " << state_;
ChangeState(kPaused);
}
void FakeAudioRendererSink::Play() {
DCHECK(state_ == kStarted || state_ == kPaused) << "state_ " << state_;
DCHECK_EQ(state_, kPaused);
ChangeState(kPlaying);
}
bool FakeAudioRendererSink::SetVolume(double volume) {
return true;
}
bool FakeAudioRendererSink::Render(AudioBus* dest, int audio_delay_milliseconds,
int* frames_written) {
if (state_ != kPlaying)
return false;
*frames_written = callback_->Render(dest, audio_delay_milliseconds);
return true;
}
void FakeAudioRendererSink::OnRenderError() {
DCHECK_NE(state_, kUninitialized);
DCHECK_NE(state_, kStopped);
callback_->OnRenderError();
}
void FakeAudioRendererSink::ChangeState(State new_state) {
static const char* kStateNames[] = {
"kUninitialized",
"kInitialized",
"kStarted",
"kPaused",
"kPlaying",
"kStopped"
};
DVLOG(1) << __FUNCTION__ << " : "
<< kStateNames[state_] << " -> " << kStateNames[new_state];
state_ = new_state;
}
} // namespace media
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