Add CDM video decoder.

webkit/media/crypto/decoders/ffmpeg_util.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 "base/logging.h"
+#include "webkit/media/crypto/decoders/ffmpeg_util.h"
+#include "webkit/media/crypto/ppapi/content_decryption_module.h"
+
+namespace webkit_media {
+
+using cdm::VideoFrame;
+
+VideoFrame::ColorFormat PixelFormatToVideoFormat(PixelFormat pixel_format) {
+  switch (pixel_format) {
+    case PIX_FMT_YUV420P:
+      return VideoFrame::kFormatYv12;
+    default:
+      DVLOG(1) << "Unsupported PixelFormat: " << pixel_format;
+  }
+  return VideoFrame::kFormatInvalid;
+}
+
+}  // namespace webkit_media