Integrate VDA with WebRTC.

content/renderer/media/rtc_video_decoder_factory.cc

+// Copyright (c) 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_decoder_factory.h"
+
+#include "content/renderer/media/rtc_video_decoder.h"
+
+namespace content {
+
+RTCVideoDecoderFactory::RTCVideoDecoderFactory(
+    const scoped_refptr<base::MessageLoopProxy>& decoder_message_loop,
+    const scoped_refptr<media::GpuVideoDecoder::Factories>& gpu_factories)
+    : decoder_message_loop_(decoder_message_loop),
+      gpu_factories_(gpu_factories) {
+}
+
+webrtc::VideoDecoder* RTCVideoDecoderFactory::CreateVideoDecoder(
+    webrtc::VideoCodecType type) {
+  if (type == webrtc::kVideoCodecVP8) {

[Pawel Osciak, 2013/05/15 17:26:32]

Is there a chance this could be moved to actual decoder to make this decision at
some point? Perhaps a TODO at least?

[wuchengli, 2013/05/16 16:05:45]

From my understanding of the code, I think CreateVideoDecoder should return NULL
if the codec is not supported. It seems WebRTC will register the codec as the
supported one. Maybe I can ask webrtc eng about this.
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/libjin...

I was thinking to move GpuVideoDecoder::Initialize here but we don't have video
frame size here. Initialize has a DCHECK against (0,0) size in
VideoDecoderConfig.

All VideoCodecType values are kVideoCodecVP8, kVideoCodecI420, kVideoCodecRED,
kVideoCodecULPFEC, kVideoCodecGeneric, and kVideoCodecUnknown. It is very
different from media::VideoCodecProfile. The only value can be mapped to
VideoCodecProfile is kVideoCodecVP8.

[wuchengli, 2013/05/23 16:50:47]

The decision is moved to actual decoder now.

+    media::VideoDecoder* gpu_video_decoder =
+        new media::GpuVideoDecoder(decoder_message_loop_, gpu_factories_);
+    return new RTCVideoDecoder(gpu_video_decoder, decoder_message_loop_);
+  }
+  return NULL;
+}
+
+void RTCVideoDecoderFactory::DestroyVideoDecoder(
+    webrtc::VideoDecoder* decoder) {
+  delete decoder;
+}
+
+}  // namespace content