blob: a08b108c57d32ed9be5f2be2ef1f725b569ce26d [file] [log] [blame]
// Copyright (c) 2012 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 <vector>
#include "base/callback.h"
#include "media/base/audio_converter.h"
#include "media/base/audio_renderer_sink.h"
namespace media {
class AudioRendererMixer;
class MEDIA_EXPORT AudioRendererMixerInput
: NON_EXPORTED_BASE(public AudioRendererSink),
public AudioConverter::InputCallback {
typedef base::Callback<AudioRendererMixer*(
const AudioParameters& params)> GetMixerCB;
typedef base::Callback<void(const AudioParameters& params)> RemoveMixerCB;
const GetMixerCB& get_mixer_cb, const RemoveMixerCB& remove_mixer_cb);
// AudioRendererSink implementation.
virtual void Start() OVERRIDE;
virtual void Stop() OVERRIDE;
virtual void Play() OVERRIDE;
virtual void Pause(bool flush) OVERRIDE;
virtual bool SetVolume(double volume) OVERRIDE;
virtual void Initialize(const AudioParameters& params,
AudioRendererSink::RenderCallback* renderer) OVERRIDE;
// Called by AudioRendererMixer when new delay information is available.
void set_audio_delay_milliseconds(int audio_delay_milliseconds) {
current_audio_delay_milliseconds_ = audio_delay_milliseconds;
// Called by AudioRendererMixer when an error occurs.
void OnRenderError();
virtual ~AudioRendererMixerInput();
friend class AudioRendererMixerInputTest;
bool playing_;
bool initialized_;
double volume_;
// AudioConverter::InputCallback implementation.
virtual double ProvideInput(AudioBus* audio_bus,
base::TimeDelta buffer_delay) OVERRIDE;
// Callbacks provided during construction which allow AudioRendererMixerInput
// to retrieve a mixer during Initialize() and notify when it's done with it.
GetMixerCB get_mixer_cb_;
RemoveMixerCB remove_mixer_cb_;
// AudioParameters received during Initialize().
AudioParameters params_;
// AudioRendererMixer provided through |get_mixer_cb_| during Initialize(),
// guaranteed to live (at least) until |remove_mixer_cb_| is called.
AudioRendererMixer* mixer_;
// Source of audio data which is provided to the mixer.
AudioRendererSink::RenderCallback* callback_;
// The current audio delay as last provided by AudioRendererMixer.
int current_audio_delay_milliseconds_;
} // namespace media