| /* |
| * libjingle |
| * Copyright 2004--2010, Google Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "talk/sound/nullsoundsystem.h" |
| |
| #include "talk/base/logging.h" |
| #include "talk/sound/sounddevicelocator.h" |
| #include "talk/sound/soundinputstreaminterface.h" |
| #include "talk/sound/soundoutputstreaminterface.h" |
| |
| namespace talk_base { |
| |
| class Thread; |
| |
| } |
| |
| namespace cricket { |
| |
| // Name used for the single device and the sound system itself. |
| static const char kNullName[] = "null"; |
| |
| class NullSoundDeviceLocator : public SoundDeviceLocator { |
| public: |
| NullSoundDeviceLocator() : SoundDeviceLocator(kNullName, kNullName) {} |
| |
| virtual SoundDeviceLocator *Copy() const { |
| return new NullSoundDeviceLocator(); |
| } |
| }; |
| |
| class NullSoundInputStream : public SoundInputStreamInterface { |
| public: |
| virtual bool StartReading() { |
| return true; |
| } |
| |
| virtual bool StopReading() { |
| return true; |
| } |
| |
| virtual bool GetVolume(int *volume) { |
| *volume = SoundSystemInterface::kMinVolume; |
| return true; |
| } |
| |
| virtual bool SetVolume(int volume) { |
| return false; |
| } |
| |
| virtual bool Close() { |
| return true; |
| } |
| |
| virtual int LatencyUsecs() { |
| return 0; |
| } |
| }; |
| |
| class NullSoundOutputStream : public SoundOutputStreamInterface { |
| public: |
| virtual bool EnableBufferMonitoring() { |
| return true; |
| } |
| |
| virtual bool DisableBufferMonitoring() { |
| return true; |
| } |
| |
| virtual bool WriteSamples(const void *sample_data, |
| size_t size) { |
| LOG(LS_VERBOSE) << "Got " << size << " bytes of playback samples"; |
| return true; |
| } |
| |
| virtual bool GetVolume(int *volume) { |
| *volume = SoundSystemInterface::kMinVolume; |
| return true; |
| } |
| |
| virtual bool SetVolume(int volume) { |
| return false; |
| } |
| |
| virtual bool Close() { |
| return true; |
| } |
| |
| virtual int LatencyUsecs() { |
| return 0; |
| } |
| }; |
| |
| NullSoundSystem::~NullSoundSystem() { |
| } |
| |
| bool NullSoundSystem::Init() { |
| return true; |
| } |
| |
| void NullSoundSystem::Terminate() { |
| // Nothing to do. |
| } |
| |
| bool NullSoundSystem::EnumeratePlaybackDevices( |
| SoundSystemInterface::SoundDeviceLocatorList *devices) { |
| ClearSoundDeviceLocatorList(devices); |
| SoundDeviceLocator *device; |
| GetDefaultPlaybackDevice(&device); |
| devices->push_back(device); |
| return true; |
| } |
| |
| bool NullSoundSystem::EnumerateCaptureDevices( |
| SoundSystemInterface::SoundDeviceLocatorList *devices) { |
| ClearSoundDeviceLocatorList(devices); |
| SoundDeviceLocator *device; |
| GetDefaultCaptureDevice(&device); |
| devices->push_back(device); |
| return true; |
| } |
| |
| bool NullSoundSystem::GetDefaultPlaybackDevice( |
| SoundDeviceLocator **device) { |
| *device = new NullSoundDeviceLocator(); |
| return true; |
| } |
| |
| bool NullSoundSystem::GetDefaultCaptureDevice( |
| SoundDeviceLocator **device) { |
| *device = new NullSoundDeviceLocator(); |
| return true; |
| } |
| |
| SoundOutputStreamInterface *NullSoundSystem::OpenPlaybackDevice( |
| const SoundDeviceLocator *device, |
| const OpenParams ¶ms) { |
| return new NullSoundOutputStream(); |
| } |
| |
| SoundInputStreamInterface *NullSoundSystem::OpenCaptureDevice( |
| const SoundDeviceLocator *device, |
| const OpenParams ¶ms) { |
| return new NullSoundInputStream(); |
| } |
| |
| const char *NullSoundSystem::GetName() const { |
| return kNullName; |
| } |
| |
| } // namespace cricket |