src/ppapi/shared_impl/ppb_video_decoder_shared.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef PPAPI_SHARED_IMPL_PPB_VIDEO_DECODER_SHARED_H_
   6 #define PPAPI_SHARED_IMPL_PPB_VIDEO_DECODER_SHARED_H_
   7
   8 #include <map>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "ppapi/c/dev/ppb_video_decoder_dev.h"
  14 #include "ppapi/shared_impl/resource.h"
  15 #include "ppapi/shared_impl/tracked_callback.h"
  16 #include "ppapi/thunk/ppb_video_decoder_dev_api.h"
  17
  18 namespace gpu {
  19 namespace gles2 {
  20 class GLES2Implementation;
  21 }  // namespace gles2
  22 }  // namespace gpu
  23
  24 namespace ppapi {
  25
  26 // Implements the logic to set and run callbacks for various video decoder
  27 // events. Both the proxy and the renderer implementation share this code.
  28 class PPAPI_SHARED_EXPORT PPB_VideoDecoder_Shared
  29     : public Resource,
  30       NON_EXPORTED_BASE(public thunk::PPB_VideoDecoder_Dev_API) {
  31  public:
  32   explicit PPB_VideoDecoder_Shared(PP_Instance instance);
  33   explicit PPB_VideoDecoder_Shared(const HostResource& host_resource);
  34   virtual ~PPB_VideoDecoder_Shared();
  35
  36   // Resource overrides.
  37   virtual thunk::PPB_VideoDecoder_Dev_API* AsPPB_VideoDecoder_Dev_API()
  38       OVERRIDE;
  39
  40   // PPB_VideoDecoder_Dev_API implementation.
  41   virtual void Destroy() OVERRIDE;
  42
  43  protected:
  44   bool SetFlushCallback(scoped_refptr<TrackedCallback> callback);
  45   bool SetResetCallback(scoped_refptr<TrackedCallback> callback);
  46   bool SetBitstreamBufferCallback(int32 bitstream_buffer_id,
  47                                   scoped_refptr<TrackedCallback> callback);
  48
  49   void RunFlushCallback(int32 result);
  50   void RunResetCallback(int32 result);
  51   void RunBitstreamBufferCallback(int32 bitstream_buffer_id, int32 result);
  52
  53   // Tell command buffer to process all commands it has received so far.
  54   void FlushCommandBuffer();
  55
  56   // Initialize the underlying decoder.
  57   void InitCommon(PP_Resource graphics_context,
  58                   gpu::gles2::GLES2Implementation* gles2_impl);
  59
  60  private:
  61   // Key: bitstream_buffer_id, value: callback to run when bitstream decode is
  62   // done.
  63   typedef std::map<int32, scoped_refptr<TrackedCallback> > CallbackById;
  64
  65   scoped_refptr<TrackedCallback> flush_callback_;
  66   scoped_refptr<TrackedCallback> reset_callback_;
  67   CallbackById bitstream_buffer_callbacks_;
  68
  69   // The resource ID of the underlying Graphics3D object being used.  Used only
  70   // for reference counting to keep it alive for the lifetime of |*this|.
  71   PP_Resource graphics_context_;
  72
  73   // Reference to the GLES2Implementation owned by |graphics_context_|.
  74   // Graphics3D is guaranteed to be alive for the lifetime of this class.
  75   // In the out-of-process case, Graphics3D's gles2_impl() exists in the plugin
  76   // process only, so gles2_impl_ is NULL in that case.
  77   gpu::gles2::GLES2Implementation* gles2_impl_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(PPB_VideoDecoder_Shared);
  80 };
  81
  82 }  // namespace ppapi
  83
  84 #endif  // PPAPI_SHARED_IMPL_PPB_VIDEO_DECODER_SHARED_H_