WIP: Add hardware jpeg decode on tegra platform

content/common/gpu/media/jpeg_codec.h

+// Copyright (c) 2011 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 CONTENT_COMMON_GPU_MEDIA_JPEG_CODEC_H_
+#define CONTENT_COMMON_GPU_MEDIA_JPEG_CODEC_H_
+
+#include <stddef.h>
+#include "base/memory/scoped_ptr.h"
+
+namespace content {
+
+// Interface for encoding/decoding JPEG data. This is a wrapper around libjpeg,
+// which has an inconvenient interface for callers. This is only used for UI
+// elements, WebKit has its own more complicated JPEG decoder which handles,
+// among other things, partially downloaded data.
+class JPEGCodec {
+ public:
+
+ enum Type {
+      kDecoder,
+      kEncoder,
+      kImageProcessor,
+ };
+
+ virtual ~JPEGCodec();
+
+ static scoped_ptr<JPEGCodec> Create(Type type);
+
+  virtual bool Initialize() = 0;
+
+  // Decodes the JPEG data contained in input of length input_size. The
+  // decoded data will be placed in *output with the dimensions in *w and *h
+  // on success (returns true). This data will be written in the'format'
+  // format. On failure, the values of these output variables is undefined.
+  virtual bool Decode(const unsigned char* input, size_t input_size,
+                    unsigned char** output, unsigned * w, unsigned * h,
+                    unsigned* row_bytes) = 0;
+
+  // Decodes the JPEG data contained in input of length input_size. If
+  // successful, a SkBitmap is created and returned. It is up to the caller
+  // to delete the returned bitmap.
+  //static SkBitmap* Decode(const unsigned char* input, size_t input_size);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_MEDIA_JPEG_CODEC_H_