henrike@webrtc.org | 91bac04 | 2014-08-26 22:04:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #ifndef WEBRTC_SOUND_ALSASOUNDSYSTEM_H_ |
| 12 | #define WEBRTC_SOUND_ALSASOUNDSYSTEM_H_ |
| 13 | |
| 14 | #include "webrtc/sound/alsasymboltable.h" |
| 15 | #include "webrtc/sound/soundsysteminterface.h" |
| 16 | #include "webrtc/base/constructormagic.h" |
| 17 | |
| 18 | namespace rtc { |
| 19 | |
| 20 | class AlsaStream; |
| 21 | class AlsaInputStream; |
| 22 | class AlsaOutputStream; |
| 23 | |
| 24 | // Sound system implementation for ALSA, the predominant sound device API on |
| 25 | // Linux (but typically not used directly by applications anymore). |
| 26 | class AlsaSoundSystem : public SoundSystemInterface { |
| 27 | friend class AlsaStream; |
| 28 | friend class AlsaInputStream; |
| 29 | friend class AlsaOutputStream; |
| 30 | public: |
| 31 | static SoundSystemInterface *Create() { |
| 32 | return new AlsaSoundSystem(); |
| 33 | } |
| 34 | |
| 35 | AlsaSoundSystem(); |
| 36 | |
| 37 | virtual ~AlsaSoundSystem(); |
| 38 | |
| 39 | virtual bool Init(); |
| 40 | virtual void Terminate(); |
| 41 | |
| 42 | virtual bool EnumeratePlaybackDevices(SoundDeviceLocatorList *devices); |
| 43 | virtual bool EnumerateCaptureDevices(SoundDeviceLocatorList *devices); |
| 44 | |
| 45 | virtual bool GetDefaultPlaybackDevice(SoundDeviceLocator **device); |
| 46 | virtual bool GetDefaultCaptureDevice(SoundDeviceLocator **device); |
| 47 | |
| 48 | virtual SoundOutputStreamInterface *OpenPlaybackDevice( |
| 49 | const SoundDeviceLocator *device, |
| 50 | const OpenParams ¶ms); |
| 51 | virtual SoundInputStreamInterface *OpenCaptureDevice( |
| 52 | const SoundDeviceLocator *device, |
| 53 | const OpenParams ¶ms); |
| 54 | |
| 55 | virtual const char *GetName() const; |
| 56 | |
| 57 | private: |
| 58 | bool IsInitialized() { return initialized_; } |
| 59 | |
| 60 | bool EnumerateDevices(SoundDeviceLocatorList *devices, |
| 61 | bool capture_not_playback); |
| 62 | |
| 63 | bool GetDefaultDevice(SoundDeviceLocator **device); |
| 64 | |
| 65 | static size_t FrameSize(const OpenParams ¶ms); |
| 66 | |
| 67 | template <typename StreamInterface> |
| 68 | StreamInterface *OpenDevice( |
| 69 | const SoundDeviceLocator *device, |
| 70 | const OpenParams ¶ms, |
| 71 | snd_pcm_stream_t type, |
| 72 | StreamInterface *(AlsaSoundSystem::*start_fn)( |
| 73 | snd_pcm_t *handle, |
| 74 | size_t frame_size, |
| 75 | int wait_timeout_ms, |
| 76 | int flags, |
| 77 | int freq)); |
| 78 | |
| 79 | SoundOutputStreamInterface *StartOutputStream( |
| 80 | snd_pcm_t *handle, |
| 81 | size_t frame_size, |
| 82 | int wait_timeout_ms, |
| 83 | int flags, |
| 84 | int freq); |
| 85 | |
| 86 | SoundInputStreamInterface *StartInputStream( |
| 87 | snd_pcm_t *handle, |
| 88 | size_t frame_size, |
| 89 | int wait_timeout_ms, |
| 90 | int flags, |
| 91 | int freq); |
| 92 | |
| 93 | const char *GetError(int err); |
| 94 | |
| 95 | bool initialized_; |
| 96 | AlsaSymbolTable symbol_table_; |
| 97 | |
| 98 | DISALLOW_COPY_AND_ASSIGN(AlsaSoundSystem); |
| 99 | }; |
| 100 | |
| 101 | } // namespace rtc |
| 102 | |
| 103 | #endif // WEBRTC_SOUND_ALSASOUNDSYSTEM_H_ |