Video decode in hardware on ARM platform.

content/common/gpu/media/omx_video_decode_accelerator.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_OMX_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_OMX_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <dlfcn.h>
 #include <map>
 #include <queue>
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/shared_memory.h"
 #include "media/video/video_decode_accelerator.h"
-#include "third_party/angle/include/EGL/egl.h"
-#include "third_party/angle/include/EGL/eglext.h"
+#include "content/common/gpu/media/gles2_texture_to_egl_image_translator.h"

[Ami GONE FROM CHROMIUM, 2012/02/18 00:00:25]

Since only a pointer to the translator is held by this class, you can
fwd-declare it and avoid the extra header inclusions.

 #include "third_party/openmax/il/OMX_Component.h"
 #include "third_party/openmax/il/OMX_Core.h"
 #include "third_party/openmax/il/OMX_Video.h"
 
 // Class to wrap OpenMAX IL accelerator behind VideoDecodeAccelerator interface.
 // The implementation assumes an OpenMAX IL 1.1.2 implementation conforming to
 // http://www.khronos.org/registry/omxil/specs/OpenMAX_IL_1_1_2_Specification.pdf
 //
 // This class lives on a single thread and DCHECKs that it is never accessed
 // from any other.  OMX callbacks are trampolined from the OMX component's
@@ skipping 107 matching lines @@
   // Following are input port related variables.
   int input_buffer_count_;
   int input_buffer_size_;
   OMX_U32 input_port_;
   int input_buffers_at_component_;
 
   // Following are output port related variables.
   OMX_U32 output_port_;
   int output_buffers_at_component_;
 
+  int width_ ;

[Ami GONE FROM CHROMIUM, 2012/02/18 00:00:25]

prefix both this and the next member to indicate their relevance:
int last_requested_picture_buffer_width_;
int last_requested_picture_buffer_height_;

Although I'd use a gfx::Size instead:
gfx::Size last_requested_picture_buffer_dimensions_;
and also pass a 
const gfx::Size&
to the translator's method instead of independent width/height params.

(using a single variable ensures the order is not confused, and ensures that
both width & height are always set and neither is forgotten)

+  int height_;
+
   // NOTE: someday there may be multiple contexts for a single decoder.  But not
   // today.
   // TODO(fischman,vrk): handle lost contexts?
   EGLDisplay egl_display_;
   EGLContext egl_context_;
 
   // Free input OpenMAX buffers that can be used to take bitstream from demuxer.
   std::queue<OMX_BUFFERHEADERTYPE*> free_input_buffers_;
 
   // For output buffer recycling cases.
@@ skipping 11 matching lines @@
   BitstreamBufferList queued_bitstream_buffers_;
   // Available output picture buffers released during Reset() and awaiting
   // re-use once Reset is done.  Is empty most of the time and drained right
   // before NotifyResetDone is sent.
   std::vector<int> queued_picture_buffer_ids_;
 
   // To expose client callbacks from VideoDecodeAccelerator.
   // NOTE: all calls to this object *MUST* be executed in message_loop_.
   Client* client_;
 
+  Gles2TextureToEglImageTranslator* texture2eglImage_translator_;

[Ami GONE FROM CHROMIUM, 2012/02/18 00:00:25]

we don't use '2' as a synonym for 'to', and what we don't use camelCase for
class members.
texture_to_egl_image_translator_

+
   // These two members are only used during Initialization.

[Ami GONE FROM CHROMIUM, 2012/02/18 00:00:25]

s/two //

   // OMX_AVCProfile requested during Initialization.
   uint32 profile_;
   bool component_name_is_nvidia_h264ext_;
+  bool component_name_is_sec_h264ext_;
 
   // Method to handle events
   void EventHandlerCompleteTask(OMX_EVENTTYPE event,
                                 OMX_U32 data1,
                                 OMX_U32 data2);
 
   // Method to receive buffers from component's input port
   void EmptyBufferDoneTask(OMX_BUFFERHEADERTYPE* buffer);
 
   // Method to receive buffers from component's output port
@@ skipping 13 matching lines @@
                                     OMX_PTR event_data);
   static OMX_ERRORTYPE EmptyBufferCallback(OMX_HANDLETYPE component,
                                            OMX_PTR priv_data,
                                            OMX_BUFFERHEADERTYPE* buffer);
   static OMX_ERRORTYPE FillBufferCallback(OMX_HANDLETYPE component,
                                           OMX_PTR priv_data,
                                           OMX_BUFFERHEADERTYPE* buffer);
 };
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_OMX_VIDEO_DECODE_ACCELERATOR_H_