Add CDM video decoder.

webkit/media/crypto/decoders/video_decoder.h

+// 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.
+
+#ifndef WEBKIT_MEDIA_CRYPTO_DECODERS_VIDEO_DECODER_H_
+#define WEBKIT_MEDIA_CRYPTO_DECODERS_VIDEO_DECODER_H_
+
+#include "base/basictypes.h"
+#include "webkit/media/crypto/ppapi/content_decryption_module.h"
+
+namespace webkit_media {
+
+class VideoDecoder {

[xhwang, 2012/09/04 14:50:21]

Media code try to avoid defining interface classes if there's only one
implementation. Other CDMs may not want to implement this interface if they want
to protect the decrypted compressed frames.

+ public:
+  virtual bool Initialize(const cdm::VideoDecoderConfig& config) = 0;
+  virtual bool DecodeFrame(const cdm::VideoFrame& compressed_frame,
+                           cdm::VideoFrame* decompressed_frame) = 0;
+
+ protected:
+  VideoDecoder() {}
+  virtual ~VideoDecoder() {}
+

[ddorwin, 2012/09/02 21:39:08]

private:

+  DISALLOW_COPY_AND_ASSIGN(VideoDecoder);
+};
+
+}  // namespace webkit_media
+
+#endif  // WEBKIT_MEDIA_CRYPTO_DECODERS_VIDEO_DECODER_H_