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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.
#ifndef MEDIA_AUDIO_SOUNDS_AUDIO_STREAM_HANDLER_H_
#define MEDIA_AUDIO_SOUNDS_AUDIO_STREAM_HANDLER_H_
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/strings/string_piece.h"
#include "base/threading/non_thread_safe.h"
#include "media/audio/audio_io.h"
#include "media/audio/audio_parameters.h"
#include "media/audio/sounds/wav_audio_handler.h"
#include "media/base/media_export.h"
namespace media {
class AudioManager;
// This class sends a sound to the audio manager.
class MEDIA_EXPORT AudioStreamHandler : public base::NonThreadSafe {
public:
class TestObserver {
public:
virtual ~TestObserver() {}
// Following methods will be called only from the audio thread.
// Called when AudioOutputStreamProxy::Start() was successfully called.
virtual void OnPlay() = 0;
// Called when AudioOutputStreamProxy::Stop() was successfully called.
virtual void OnStop(size_t cursor) = 0;
};
// C-tor for AudioStreamHandler. |wav_data| should be a raw
// uncompressed WAVE data which will be sent to the audio manager.
explicit AudioStreamHandler(const base::StringPiece& wav_data);
virtual ~AudioStreamHandler();
// Returns true iff AudioStreamHandler is correctly initialized;
bool IsInitialized() const;
// Stops any previous playback if it's still not completed and
// starts new playback. Volume level will be set according to
// current settings and won't be changed during playback. Returns
// true iff new playback was successfully started.
bool Play();
// Stops current playback.
void Stop();
const WavAudioHandler& wav_audio_handler() const { return wav_audio_; }
private:
friend class AudioStreamHandlerTest;
friend class SoundsManagerTest;
class AudioStreamContainer;
static void SetObserverForTesting(TestObserver* observer);
static void SetAudioSourceForTesting(
AudioOutputStream::AudioSourceCallback* source);
WavAudioHandler wav_audio_;
scoped_ptr<AudioStreamContainer> stream_;
bool initialized_;
DISALLOW_COPY_AND_ASSIGN(AudioStreamHandler);
};
} // namespace media
#endif // MEDIA_AUDIO_SOUNDS_AUDIO_STREAM_HANDLER_H_
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