H264 HW encode using MediaFoundation

media/base/media_switches.cc

 // 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 "build/build_config.h"
 #include "media/base/media_switches.h"
 
 namespace switches {
 
 // Allow users to specify a custom buffer size for debugging purpose.
@@ skipping 37 matching lines @@
     "use-gpu-memory-buffers-for-capture";
 
 #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";
 
+// Enables H264 HW encode acceleration for Win.
+const char kEnableWinHWH264Encoding[] = "enable-win-hw-h264-encoding";

[sandersd (OOO until July 31), 2016/07/14 22:38:04]

Probably better to remove 'win' from the name.

It's probably also a good idea to swap 'hw' for 'mf'/'mediafoundation', but of
course that makes it a platform-specific flag again.

[emircan, 2016/07/15 04:58:30]

Done.

+
 // 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
@@ skipping 76 matching lines @@
 
 // Use new audio rendering mixer.
 const base::Feature kNewAudioRenderingMixingStrategy{
     "NewAudioRenderingMixingStrategy", base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Use shared block-based buffering for media.
 const base::Feature kUseNewMediaCache{"use-new-media-cache",
                                       base::FEATURE_ENABLED_BY_DEFAULT};
 
 }  // namespace media