| // 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. |
| |
| #ifndef CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_OUTPUT_H_ |
| #define CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_OUTPUT_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "media/audio/audio_output_ipc.h" |
| |
| namespace media { |
| class AudioParameters; |
| } |
| |
| namespace base { |
| class SingleThreadTaskRunner; |
| } |
| |
| namespace content { |
| class AudioHelper; |
| |
| class PepperPlatformAudioOutput |
| : public media::AudioOutputIPCDelegate, |
| public base::RefCountedThreadSafe<PepperPlatformAudioOutput> { |
| public: |
| // Factory function, returns NULL on failure. StreamCreated() will be called |
| // when the stream is created. |
| static PepperPlatformAudioOutput* Create(int sample_rate, |
| int frames_per_buffer, |
| int source_render_frame_id, |
| AudioHelper* client); |
| |
| // The following three methods are all called on main thread. |
| |
| // Starts the playback. Returns false on error or if called before the |
| // stream is created or after the stream is closed. |
| bool StartPlayback(); |
| |
| // Stops the playback. Returns false on error or if called before the stream |
| // is created or after the stream is closed. |
| bool StopPlayback(); |
| |
| // Sets the volume. Returns false on error or if called before the stream |
| // is created or after the stream is closed. |
| bool SetVolume(double volume); |
| |
| // Closes the stream. Make sure to call this before the object is |
| // destructed. |
| void ShutDown(); |
| |
| // media::AudioOutputIPCDelegate implementation. |
| void OnError() override; |
| void OnDeviceAuthorized(media::OutputDeviceStatus device_status, |
| const media::AudioParameters& output_params, |
| const std::string& matched_device_id) override; |
| void OnStreamCreated(base::UnsafeSharedMemoryRegion shared_memory_region, |
| base::SyncSocket::Handle socket_handle, |
| bool playing_automatically) override; |
| void OnIPCClosed() override; |
| |
| protected: |
| ~PepperPlatformAudioOutput() override; |
| |
| private: |
| friend class base::RefCountedThreadSafe<PepperPlatformAudioOutput>; |
| |
| PepperPlatformAudioOutput(); |
| |
| bool Initialize(int sample_rate, |
| int frames_per_buffer, |
| int source_render_frame_id, |
| AudioHelper* client); |
| |
| // I/O thread backends to above functions. |
| void InitializeOnIOThread(const media::AudioParameters& params); |
| void StartPlaybackOnIOThread(); |
| void StopPlaybackOnIOThread(); |
| void SetVolumeOnIOThread(double volume); |
| void ShutDownOnIOThread(); |
| |
| // The client to notify when the stream is created. THIS MUST ONLY BE |
| // ACCESSED ON THE MAIN THREAD. |
| AudioHelper* client_; |
| |
| // Used to send/receive IPC. THIS MUST ONLY BE ACCESSED ON THE |
| // I/O thread except to send messages and get the message loop. |
| std::unique_ptr<media::AudioOutputIPC> ipc_; |
| |
| scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_; |
| scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PepperPlatformAudioOutput); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_OUTPUT_H_ |