28e2075280
trunk/talk git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d
121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
/*
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* libjingle
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* Copyright 2004--2010, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_SOUND_ALSASOUNDSYSTEM_H_
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#define TALK_SOUND_ALSASOUNDSYSTEM_H_
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#include "talk/base/constructormagic.h"
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#include "talk/sound/alsasymboltable.h"
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#include "talk/sound/soundsysteminterface.h"
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namespace cricket {
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class AlsaStream;
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class AlsaInputStream;
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class AlsaOutputStream;
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// Sound system implementation for ALSA, the predominant sound device API on
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// Linux (but typically not used directly by applications anymore).
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class AlsaSoundSystem : public SoundSystemInterface {
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friend class AlsaStream;
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friend class AlsaInputStream;
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friend class AlsaOutputStream;
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public:
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static SoundSystemInterface *Create() {
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return new AlsaSoundSystem();
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}
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AlsaSoundSystem();
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virtual ~AlsaSoundSystem();
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virtual bool Init();
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virtual void Terminate();
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virtual bool EnumeratePlaybackDevices(SoundDeviceLocatorList *devices);
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virtual bool EnumerateCaptureDevices(SoundDeviceLocatorList *devices);
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virtual bool GetDefaultPlaybackDevice(SoundDeviceLocator **device);
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virtual bool GetDefaultCaptureDevice(SoundDeviceLocator **device);
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virtual SoundOutputStreamInterface *OpenPlaybackDevice(
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const SoundDeviceLocator *device,
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const OpenParams ¶ms);
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virtual SoundInputStreamInterface *OpenCaptureDevice(
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const SoundDeviceLocator *device,
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const OpenParams ¶ms);
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virtual const char *GetName() const;
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private:
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bool IsInitialized() { return initialized_; }
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bool EnumerateDevices(SoundDeviceLocatorList *devices,
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bool capture_not_playback);
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bool GetDefaultDevice(SoundDeviceLocator **device);
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static size_t FrameSize(const OpenParams ¶ms);
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template <typename StreamInterface>
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StreamInterface *OpenDevice(
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const SoundDeviceLocator *device,
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const OpenParams ¶ms,
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snd_pcm_stream_t type,
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StreamInterface *(AlsaSoundSystem::*start_fn)(
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snd_pcm_t *handle,
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size_t frame_size,
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int wait_timeout_ms,
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int flags,
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int freq));
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SoundOutputStreamInterface *StartOutputStream(
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snd_pcm_t *handle,
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size_t frame_size,
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int wait_timeout_ms,
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int flags,
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int freq);
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SoundInputStreamInterface *StartInputStream(
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snd_pcm_t *handle,
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size_t frame_size,
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int wait_timeout_ms,
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int flags,
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int freq);
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const char *GetError(int err);
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bool initialized_;
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AlsaSymbolTable symbol_table_;
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DISALLOW_COPY_AND_ASSIGN(AlsaSoundSystem);
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};
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} // namespace cricket
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#endif // TALK_SOUND_ALSASOUNDSYSTEM_H_
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