[BackgroundSync] Clean up some tests
[chromium-blink-merge.git] / media / base / media_switches.cc
blob05a04b713f5d7b5d3eb479484f653a055c6b12b0
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "media/base/media_switches.h"
7 namespace switches {
9 // Allow users to specify a custom buffer size for debugging purpose.
10 const char kAudioBufferSize[] = "audio-buffer-size";
12 // Disables the new vsync driven video renderering path.
13 const char kDisableNewVideoRenderer[] = "disable-new-video-renderer";
15 // Set number of threads to use for video decoding.
16 const char kVideoThreads[] = "video-threads";
18 #if defined(OS_ANDROID)
19 // Disables the infobar popup for accessing protected media identifier.
20 const char kDisableInfobarForProtectedMediaIdentifier[] =
21 "disable-infobar-for-protected-media-identifier";
23 // Sets the MediaSource player that uses the separate media thread
24 const char kEnableMediaThreadForMediaPlayback[] =
25 "enable-media-thread-for-media-playback";
26 #endif
28 #if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_SOLARIS)
29 // The Alsa device to use when opening an audio input stream.
30 const char kAlsaInputDevice[] = "alsa-input-device";
31 // The Alsa device to use when opening an audio stream.
32 const char kAlsaOutputDevice[] = "alsa-output-device";
33 #endif
35 #if defined(OS_MACOSX)
36 // AVFoundation is available in versions 10.7 and onwards, and is to be used
37 // http://crbug.com/288562 for both audio and video device monitoring and for
38 // video capture. Being a dynamically loaded NSBundle and library, it hits the
39 // Chrome startup time (http://crbug.com/311325 and http://crbug.com/311437);
40 // for experimentation purposes, in particular library load time issue, the
41 // usage of this library can be enabled by using this flag.
42 const char kEnableAVFoundation[] = "enable-avfoundation";
44 // QTKit is the media capture API predecessor to AVFoundation, available up and
45 // until Mac OS X 10.9 (despite being deprecated in this last one). This flag
46 // is used for troubleshooting and testing, and forces QTKit in builds and
47 // configurations where AVFoundation would be used otherwise.
48 const char kForceQTKit[] = "force-qtkit";
49 #endif
51 #if defined(OS_WIN)
52 // Use exclusive mode audio streaming for Windows Vista and higher.
53 // Leads to lower latencies for audio streams which uses the
54 // AudioParameters::AUDIO_PCM_LOW_LATENCY audio path.
55 // See http://msdn.microsoft.com/en-us/library/windows/desktop/dd370844.aspx
56 // for details.
57 const char kEnableExclusiveAudio[] = "enable-exclusive-audio";
59 // Used to troubleshoot problems with different video capture implementations
60 // on Windows. By default we use the Media Foundation API on Windows 7 and up,
61 // but specifying this switch will force use of DirectShow always.
62 // See bug: http://crbug.com/268412
63 const char kForceDirectShowVideoCapture[] = "force-directshow";
65 // Force the use of MediaFoundation for video capture. This is only supported in
66 // Windows 7 and above. Used, like |kForceDirectShowVideoCapture|, to
67 // troubleshoot problems in Windows platforms.
68 const char kForceMediaFoundationVideoCapture[] = "force-mediafoundation";
70 // Use Windows WaveOut/In audio API even if Core Audio is supported.
71 const char kForceWaveAudio[] = "force-wave-audio";
73 // Instead of always using the hardware channel layout, check if a driver
74 // supports the source channel layout. Avoids outputting empty channels and
75 // permits drivers to enable stereo to multichannel expansion. Kept behind a
76 // flag since some drivers lie about supported layouts and hang when used. See
77 // http://crbug.com/259165 for more details.
78 const char kTrySupportedChannelLayouts[] = "try-supported-channel-layouts";
80 // Number of buffers to use for WaveOut.
81 const char kWaveOutBuffers[] = "waveout-buffers";
82 #endif
84 #if defined(USE_CRAS)
85 // Use CRAS, the ChromeOS audio server.
86 const char kUseCras[] = "use-cras";
87 #endif
89 // Enables the audio thread hang monitor. Allows us to find users in the field
90 // who have stuck audio threads. See crbug.com/422522 and crbug.com/478932.
91 // TODO(dalecurtis): This should be removed once those issues are resolved.
92 const char kEnableAudioHangMonitor[] = "enable-audio-hang-monitor";
94 // Use fake device for Media Stream to replace actual camera and microphone.
95 const char kUseFakeDeviceForMediaStream[] = "use-fake-device-for-media-stream";
97 // Use an .y4m file to play as the webcam. See the comments in
98 // media/video/capture/file_video_capture_device.h for more details.
99 const char kUseFileForFakeVideoCapture[] = "use-file-for-fake-video-capture";
101 // Play a .wav file as the microphone. Note that for WebRTC calls we'll treat
102 // the bits as if they came from the microphone, which means you should disable
103 // audio processing (lest your audio file will play back distorted). The input
104 // file is converted to suit Chrome's audio buses if necessary, so most sane
105 // .wav files should work.
106 const char kUseFileForFakeAudioCapture[] = "use-file-for-fake-audio-capture";
108 // Enables support for inband text tracks in media content.
109 const char kEnableInbandTextTracks[] = "enable-inband-text-tracks";
111 // When running tests on a system without the required hardware or libraries,
112 // this flag will cause the tests to fail. Otherwise, they silently succeed.
113 const char kRequireAudioHardwareForTesting[] =
114 "require-audio-hardware-for-testing";
116 // Allows clients to override the threshold for when the media renderer will
117 // declare the underflow state for the video stream when audio is present.
118 // TODO(dalecurtis): Remove once experiments for http://crbug.com/470940 finish.
119 const char kVideoUnderflowThresholdMs[] = "video-underflow-threshold-ms";
121 } // namespace switches