| // 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. |
| |
| #include "media/base/media_switches.h" |
| |
| namespace switches { |
| |
| // Allow users to specify a custom buffer size for debugging purpose. |
| const char kAudioBufferSize[] = "audio-buffer-size"; |
| |
| // Enable EAC3 playback in MSE. |
| const char kEnableEac3Playback[] = "enable-eac3-playback"; |
| |
| // Disables Opus playback in media elements. |
| const char kDisableOpusPlayback[] = "disable-opus-playback"; |
| |
| // Disables VP8 Alpha playback in media elements. |
| const char kDisableVp8AlphaPlayback[] = "disable-vp8-alpha-playback"; |
| |
| // Set number of threads to use for video decoding. |
| const char kVideoThreads[] = "video-threads"; |
| |
| // Enables MP3 stream parser for Media Source Extensions. |
| const char kEnableMP3StreamParser[] = "enable-mp3-stream-parser"; |
| |
| #if defined(OS_ANDROID) |
| // Disables the infobar popup for accessing protected media identifier. |
| const char kDisableInfobarForProtectedMediaIdentifier[] = |
| "disable-infobar-for-protected-media-identifier"; |
| |
| // Enables use of non-compositing MediaDrm decoding by default for Encrypted |
| // Media Extensions implementation. |
| const char kMediaDrmEnableNonCompositing[] = "mediadrm-enable-non-compositing"; |
| #endif |
| |
| #if defined(GOOGLE_TV) |
| // Use external video surface for video with more than or equal pixels to |
| // specified value. For example, value of 0 will enable external video surface |
| // for all videos, and value of 921600 (=1280*720) will enable external video |
| // surface for 720p video and larger. |
| const char kUseExternalVideoSurfaceThresholdInPixels[] = |
| "use-external-video-surface-threshold-in-pixels"; |
| #endif |
| |
| #if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_SOLARIS) |
| // The Alsa device to use when opening an audio input stream. |
| const char kAlsaInputDevice[] = "alsa-input-device"; |
| // The Alsa device to use when opening an audio stream. |
| const char kAlsaOutputDevice[] = "alsa-output-device"; |
| #endif |
| |
| #if defined(OS_MACOSX) |
| // Unlike other platforms, OSX requires CoreAudio calls to happen on the main |
| // thread of the process. Provide a way to disable this until support is well |
| // tested. See http://crbug.com/158170. |
| // TODO(dalecurtis): Remove this once we're sure nothing has exploded. |
| const char kDisableMainThreadAudio[] = "disable-main-thread-audio"; |
| // AVFoundation is available in versions 10.7 and onwards, and is to be used |
| // http://crbug.com/288562 for both audio and video device monitoring and for |
| // video capture. Being a dynamically loaded NSBundle and library, it hits the |
| // Chrome startup time (http://crbug.com/311325 and http://crbug.com/311437); |
| // until development is finished and the library load time issue is solved, the |
| // usage of this library is hidden behind this flag. |
| const char kEnableAVFoundation[] = "enable-avfoundation"; |
| #endif |
| |
| #if defined(OS_WIN) |
| // Use exclusive mode audio streaming for Windows Vista and higher. |
| // Leads to lower latencies for audio streams which uses the |
| // AudioParameters::AUDIO_PCM_LOW_LATENCY audio path. |
| // See http://msdn.microsoft.com/en-us/library/windows/desktop/dd370844.aspx |
| // for details. |
| const char kEnableExclusiveAudio[] = "enable-exclusive-audio"; |
| |
| // Used to troubleshoot problems with different video capture implementations |
| // on Windows. By default we use the Media Foundation API on Windows 7 and up, |
| // but specifying this switch will force use of DirectShow always. |
| // See bug: http://crbug.com/268412 |
| const char kForceDirectShowVideoCapture[] = "force-directshow"; |
| |
| // Use Windows WaveOut/In audio API even if Core Audio is supported. |
| const char kForceWaveAudio[] = "force-wave-audio"; |
| |
| // Instead of always using the hardware channel layout, check if a driver |
| // supports the source channel layout. Avoids outputting empty channels and |
| // permits drivers to enable stereo to multichannel expansion. Kept behind a |
| // flag since some drivers lie about supported layouts and hang when used. See |
| // http://crbug.com/259165 for more details. |
| const char kTrySupportedChannelLayouts[] = "try-supported-channel-layouts"; |
| |
| // Number of buffers to use for WaveOut. |
| const char kWaveOutBuffers[] = "waveout-buffers"; |
| #endif |
| |
| #if defined(USE_CRAS) |
| // Use CRAS, the ChromeOS audio server. |
| const char kUseCras[] = "use-cras"; |
| #endif |
| |
| // Disables system sounds manager. |
| const char kDisableSystemSoundsManager[] = "disable-system-sounds-manager"; |
| |
| // Use a raw video file as fake video capture device. |
| const char kUseFileForFakeVideoCapture[] = "use-file-for-fake-video-capture"; |
| |
| } // namespace switches |