Support for H264 HW offload for webRTC.

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 "content/common/gpu/client/gpu_video_encode_accelerator_host.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
-// cricket::WebRtcVideoEncoderFactory::VideoCodec
-cricket::WebRtcVideoEncoderFactory::VideoCodec VEAToWebRTCCodec(
+// one or more instances of cricket::WebRtcVideoEncoderFactory::VideoCodec
+void VEAToWebRTCCodecs(
+    std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec>* codecs,
     const media::VideoEncodeAccelerator::SupportedProfile& profile) {
-  webrtc::VideoCodecType type = webrtc::kVideoCodecUnknown;
-  std::string name;
-  int width = 0, height = 0, fps = 0;
+  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);
 
   if (profile.profile >= media::VP8PROFILE_MIN &&
       profile.profile <= media::VP8PROFILE_MAX) {
-    type = webrtc::kVideoCodecVP8;
-    name = "VP8";
+    codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
+        webrtc::kVideoCodecVP8, "VP8", width, height, fps));
   } else if (profile.profile >= media::H264PROFILE_MIN &&
              profile.profile <= media::H264PROFILE_MAX) {
-    type = webrtc::kVideoCodecGeneric;
-    name = "CAST1";
+    codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
+        webrtc::kVideoCodecGeneric, "CAST1", width, height, fps));
+    codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
+        webrtc::kVideoCodecH264, "H264", width, height, fps));
   }
-
-  if (type != webrtc::kVideoCodecUnknown) {
-    width = profile.max_resolution.width();
-    height = profile.max_resolution.height();
-    fps = profile.max_framerate.numerator;
-    DCHECK_EQ(profile.max_framerate.denominator, 1U);
-  }
-
-  return cricket::WebRtcVideoEncoderFactory::VideoCodec(
-      type, name, 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;
+    case webrtc::kVideoCodecH264:
     case webrtc::kVideoCodecGeneric:
       return media::H264PROFILE_MAIN;
     default:
       return media::VIDEO_CODEC_PROFILE_UNKNOWN;
   }
 }
 
 }  // anonymous namespace
 
 RTCVideoEncoderFactory::RTCVideoEncoderFactory(
     const scoped_refptr<media::GpuVideoAcceleratorFactories>& gpu_factories)
     : gpu_factories_(gpu_factories) {
   // Query media::VideoEncodeAccelerator (statically) for our supported codecs.
   std::vector<media::VideoEncodeAccelerator::SupportedProfile> profiles =
       GpuVideoEncodeAcceleratorHost::GetSupportedProfiles();
-  for (size_t i = 0; i < profiles.size(); ++i) {
-    VideoCodec codec = VEAToWebRTCCodec(profiles[i]);
-    if (codec.type != webrtc::kVideoCodecUnknown)
-      codecs_.push_back(codec);
-  }
+  for (size_t i = 0; i < profiles.size(); ++i)
+    VEAToWebRTCCodecs(&codecs_, profiles[i]);
 }
 
 RTCVideoEncoderFactory::~RTCVideoEncoderFactory() {}
 
 webrtc::VideoEncoder* RTCVideoEncoderFactory::CreateVideoEncoder(
     webrtc::VideoCodecType type) {
   bool found = false;
   for (size_t i = 0; i < codecs_.size(); ++i) {
     if (codecs_[i].type == type) {
       found = true;
@@ skipping 16 matching lines @@
 RTCVideoEncoderFactory::codecs() const {
   return codecs_;
 }
 
 void RTCVideoEncoderFactory::DestroyVideoEncoder(
     webrtc::VideoEncoder* encoder) {
   delete encoder;
 }
 
 }  // namespace content