| // 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"; |
| |
| // Enables the new vsync driven video renderering path. |
| const char kEnableNewVideoRenderer[] = "enable-new-video-renderer"; |
| |
| // Set number of threads to use for video decoding. |
| const char kVideoThreads[] = "video-threads"; |
| |
| // Bypass autodetection of the upper limit on resolution of streams that can |
| // be hardware decoded. |
| const char kIgnoreResolutionLimitsForAcceleratedVideoDecode[] = |
| "ignore-resolution-limits-for-accelerated-video-decode"; |
| |
| #if defined(OS_ANDROID) |
| // Disables the infobar popup for accessing protected media identifier. |
| const char kDisableInfobarForProtectedMediaIdentifier[] = |
| "disable-infobar-for-protected-media-identifier"; |
| #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) |
| // 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); |
| // for experimentation purposes, in particular library load time issue, the |
| // usage of this library can be enabled by using this flag. |
| const char kEnableAVFoundation[] = "enable-avfoundation"; |
| |
| // QTKit is the media capture API predecessor to AVFoundation, available up and |
| // until Mac OS X 10.9 (despite being deprecated in this last one). This flag |
| // is used for troubleshooting and testing, and forces QTKit in builds and |
| // configurations where AVFoundation would be used otherwise. |
| const char kForceQTKit[] = "force-qtkit"; |
| #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"; |
| |
| // Force the use of MediaFoundation for video capture. This is only supported in |
| // Windows 7 and above. Used, like |kForceDirectShowVideoCapture|, to |
| // troubleshoot problems in Windows platforms. |
| const char kForceMediaFoundationVideoCapture[] = "force-mediafoundation"; |
| |
| // 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 |
| |
| // Enables the audio thread hang monitor. Allows us to find users in the field |
| // who have stuck audio threads. See crbug.com/422522 and crbug.com/478932. |
| // TODO(dalecurtis): This should be removed once those issues are resolved. |
| const char kEnableAudioHangMonitor[] = "enable-audio-hang-monitor"; |
| |
| // Use fake device for Media Stream to replace actual camera and microphone. |
| const char kUseFakeDeviceForMediaStream[] = "use-fake-device-for-media-stream"; |
| |
| // Use an .y4m file to play as the webcam. See the comments in |
| // media/video/capture/file_video_capture_device.h for more details. |
| const char kUseFileForFakeVideoCapture[] = "use-file-for-fake-video-capture"; |
| |
| // Play a .wav file as the microphone. Note that for WebRTC calls we'll treat |
| // the bits as if they came from the microphone, which means you should disable |
| // audio processing (lest your audio file will play back distorted). The input |
| // file is converted to suit Chrome's audio buses if necessary, so most sane |
| // .wav files should work. |
| const char kUseFileForFakeAudioCapture[] = "use-file-for-fake-audio-capture"; |
| |
| // Enables support for inband text tracks in media content. |
| const char kEnableInbandTextTracks[] = "enable-inband-text-tracks"; |
| |
| // When running tests on a system without the required hardware or libraries, |
| // this flag will cause the tests to fail. Otherwise, they silently succeed. |
| const char kRequireAudioHardwareForTesting[] = |
| "require-audio-hardware-for-testing"; |
| |
| // Allows clients to override the threshold for when the media renderer will |
| // declare the underflow state for the video stream when audio is present. |
| // TODO(dalecurtis): Remove once experiments for http://crbug.com/470940 finish. |
| const char kVideoUnderflowThresholdMs[] = "video-underflow-threshold-ms"; |
| |
| } // namespace switches |