| // 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_ALSA_AUDIO_MANAGER_ALSA_H_ |
| #define MEDIA_AUDIO_ALSA_AUDIO_MANAGER_ALSA_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/compiler_specific.h" |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/threading/thread.h" |
| #include "media/audio/audio_manager_base.h" |
| |
| namespace media { |
| |
| class AlsaWrapper; |
| |
| class MEDIA_EXPORT AudioManagerAlsa : public AudioManagerBase { |
| public: |
| AudioManagerAlsa(std::unique_ptr<AudioThread> audio_thread, |
| AudioLogFactory* audio_log_factory); |
| |
| AudioManagerAlsa(const AudioManagerAlsa&) = delete; |
| AudioManagerAlsa& operator=(const AudioManagerAlsa&) = delete; |
| |
| ~AudioManagerAlsa() override; |
| |
| // Implementation of AudioManager. |
| bool HasAudioOutputDevices() override; |
| bool HasAudioInputDevices() override; |
| void GetAudioInputDeviceNames(AudioDeviceNames* device_names) override; |
| void GetAudioOutputDeviceNames(AudioDeviceNames* device_names) override; |
| AudioParameters GetInputStreamParameters( |
| const std::string& device_id) override; |
| const char* GetName() override; |
| |
| // Implementation of AudioManagerBase. |
| AudioOutputStream* MakeLinearOutputStream( |
| const AudioParameters& params, |
| const LogCallback& log_callback) override; |
| AudioOutputStream* MakeLowLatencyOutputStream( |
| const AudioParameters& params, |
| const std::string& device_id, |
| const LogCallback& log_callback) override; |
| AudioInputStream* MakeLinearInputStream( |
| const AudioParameters& params, |
| const std::string& device_id, |
| const LogCallback& log_callback) override; |
| AudioInputStream* MakeLowLatencyInputStream( |
| const AudioParameters& params, |
| const std::string& device_id, |
| const LogCallback& log_callback) override; |
| |
| protected: |
| AudioParameters GetPreferredOutputStreamParameters( |
| const std::string& output_device_id, |
| const AudioParameters& input_params) override; |
| |
| private: |
| enum StreamType { |
| kStreamPlayback = 0, |
| kStreamCapture, |
| }; |
| |
| // Gets a list of available ALSA devices. |
| void GetAlsaAudioDevices(StreamType type, AudioDeviceNames* device_names); |
| |
| // Gets the ALSA devices' names and ids that support streams of the |
| // given type. |
| void GetAlsaDevicesInfo(StreamType type, |
| void** hint, |
| AudioDeviceNames* device_names); |
| |
| // Checks if the specific ALSA device is available. |
| static bool IsAlsaDeviceAvailable(StreamType type, |
| const char* device_name); |
| |
| static const char* UnwantedDeviceTypeWhenEnumerating( |
| StreamType wanted_type); |
| |
| // Returns true if a device is present for the given stream type. |
| bool HasAnyAlsaAudioDevice(StreamType stream); |
| |
| // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream. |
| AudioOutputStream* MakeOutputStream(const AudioParameters& params); |
| |
| // Called by MakeLinearInputStream and MakeLowLatencyInputStream. |
| AudioInputStream* MakeInputStream(const AudioParameters& params, |
| const std::string& device_id); |
| |
| std::unique_ptr<AlsaWrapper> wrapper_; |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_AUDIO_ALSA_AUDIO_MANAGER_ALSA_H_ |