Only allow webrtc HW offload for H264 encode for extension process.

content/renderer/media/rtc_video_encoder_factory.cc

 // Copyright 2013 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 "content/renderer/media/rtc_video_encoder_factory.h"
 
+#include "base/command_line.h"
 #include "content/common/gpu/client/gpu_video_encode_accelerator_host.h"
+#include "content/public/common/content_switches.h"
 #include "content/renderer/media/rtc_video_encoder.h"
 #include "media/filters/gpu_video_accelerator_factories.h"
 #include "media/video/video_encode_accelerator.h"
 
 namespace content {
 
 namespace {
 
 // Translate from media::VideoEncodeAccelerator::SupportedProfile to
 // one or more instances of cricket::WebRtcVideoEncoderFactory::VideoCodec
 void VEAToWebRTCCodecs(
     std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec>* codecs,
     const media::VideoEncodeAccelerator::SupportedProfile& profile) {
   int width = profile.max_resolution.width();
   int height = profile.max_resolution.height();
   int fps = profile.max_framerate.numerator;
   DCHECK_EQ(profile.max_framerate.denominator, 1U);
 
+  const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
   if (profile.profile >= media::VP8PROFILE_MIN &&
       profile.profile <= media::VP8PROFILE_MAX) {
-    codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
-        webrtc::kVideoCodecVP8, "VP8", width, height, fps));
+    if (cmd_line->HasSwitch(switches::kEnableWebRtcHWVp8Encoding)) {
+      codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
+          webrtc::kVideoCodecVP8, "VP8", width, height, fps));
+    }
   } else if (profile.profile >= media::H264PROFILE_MIN &&
              profile.profile <= media::H264PROFILE_MAX) {
+    if (cmd_line->HasSwitch(switches::kEnableWebRtcHWH264Encoding)) {
+      codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
+          webrtc::kVideoCodecH264, "H264", width, height, fps));
+    }
+    // TODO(hshi): remove the generic codec type after CASTv1 deprecation.
     codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
         webrtc::kVideoCodecGeneric, "CAST1", width, height, fps));
-    codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
-        webrtc::kVideoCodecH264, "H264", width, height, fps));
   }
 }
 
 // Translate from cricket::WebRtcVideoEncoderFactory::VideoCodec to
 // media::VideoCodecProfile.  Pick a default profile for each codec type.
 media::VideoCodecProfile WebRTCCodecToVideoCodecProfile(
     webrtc::VideoCodecType type) {
   switch (type) {
     case webrtc::kVideoCodecVP8:
       return media::VP8PROFILE_ANY;
@@ skipping 44 matching lines @@
 RTCVideoEncoderFactory::codecs() const {
   return codecs_;
 }
 
 void RTCVideoEncoderFactory::DestroyVideoEncoder(
     webrtc::VideoEncoder* encoder) {
   delete encoder;
 }
 
 }  // namespace content