| // Copyright 2013 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SERVICES_AUDIO_PUBLIC_CPP_SOUNDS_AUDIO_STREAM_HANDLER_H_ |
| #define SERVICES_AUDIO_PUBLIC_CPP_SOUNDS_AUDIO_STREAM_HANDLER_H_ |
| |
| #include <stddef.h> |
| #include <memory> |
| |
| #include "base/compiler_specific.h" |
| #include "base/memory/scoped_refptr.h" |
| #include "base/sequence_checker.h" |
| #include "base/strings/string_piece.h" |
| #include "base/time/time.h" |
| #include "media/audio/audio_io.h" |
| #include "media/base/audio_parameters.h" |
| #include "media/base/audio_renderer_sink.h" |
| #include "media/base/media_export.h" |
| #include "services/audio/public/cpp/sounds/sounds_manager.h" |
| |
| namespace audio { |
| |
| // This class sends a sound to the audio output device. |
| class AudioStreamHandler { |
| public: |
| class TestObserver { |
| public: |
| virtual ~TestObserver() {} |
| |
| // Following methods will be called only from the audio thread. |
| |
| // Called when AudioStreamContainer was successfully created. |
| virtual void Initialize(media::AudioRendererSink::RenderCallback* callback, |
| media::AudioParameters params) = 0; |
| |
| // 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 output device. |
| explicit AudioStreamHandler( |
| SoundsManager::StreamFactoryBinder stream_factory_binder, |
| const base::StringPiece& wav_data); |
| |
| AudioStreamHandler(const AudioStreamHandler&) = delete; |
| AudioStreamHandler& operator=(const AudioStreamHandler&) = delete; |
| |
| virtual ~AudioStreamHandler(); |
| |
| // Returns true iff AudioStreamHandler is correctly initialized; |
| bool IsInitialized() const; |
| |
| // Plays sound. Volume level will be set according to current settings |
| // and won't be changed during playback. Returns true iff new playback |
| // was successfully started. |
| // |
| // NOTE: if current playback isn't at end of stream, playback request |
| // is dropped, but true is returned. |
| bool Play(); |
| |
| // Stops current playback. |
| void Stop(); |
| |
| // Get the duration of the WAV data passed in. |
| base::TimeDelta duration() const; |
| |
| static void SetObserverForTesting(TestObserver* observer); |
| |
| private: |
| friend class AudioStreamHandlerTest; |
| friend class SoundsManagerTest; |
| |
| class AudioStreamContainer; |
| |
| base::TimeDelta duration_; |
| std::unique_ptr<AudioStreamContainer> stream_; |
| scoped_refptr<base::SequencedTaskRunner> task_runner_; |
| }; |
| |
| } // namespace audio |
| |
| #endif // SERVICES_AUDIO_PUBLIC_CPP_SOUNDS_AUDIO_STREAM_HANDLER_H_ |