Description: 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 "third_party/openmax/il/OMX_Component.h"
 #include "third_party/openmax/il/OMX_Core.h"
 #include "third_party/openmax/il/OMX_Video.h"
 
+class Gles2TextureToEglImageTranslator;
+
 // 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
 // thread to maintain this invariant.  The only exception to thread-unsafety is
 // that references can be added from any thread (practically used only by the
 // OMX thread).
 class OmxVideoDecodeAccelerator : public media::VideoDecodeAccelerator {
@@ skipping 42 matching lines @@
   };
   typedef std::map<int32, OutputPicture> OutputPictureById;
 
   MessageLoop* message_loop_;
   OMX_HANDLETYPE component_handle_;
 
   // Create the Component for OMX. Handles all OMX initialization.
   bool CreateComponent();
   // Buffer allocation/free methods for input and output buffers.
   bool AllocateInputBuffers();
+  bool AllocateFakeOutputBuffers();
   bool AllocateOutputBuffers();
   void FreeInputBuffers();
   void FreeOutputBuffers();
 
   // Methods to handle OMX state transitions.  See section 3.1.1.2 of the spec.
   // Request transitioning OMX component to some other state.
   void BeginTransitionToState(OMX_STATETYPE new_state);
   // The callback received when the OMX component has transitioned.
   void DispatchStateReached(OMX_STATETYPE reached);
   // Callbacks handling transitioning to specific states during state changes.
@@ skipping 41 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_;
 
+  gfx::Size last_requested_picture_buffer_dimensions_;
+
   // 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_;
 
-  // These two members are only used during Initialization.
+  scoped_ptr<Gles2TextureToEglImageTranslator> texture_to_egl_image_translator_;
+
+  // These members are only used during Initialization.
   // OMX_AVCProfile requested during Initialization.
   uint32 profile_;
   bool component_name_is_nvidia_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
@@ skipping 16 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_