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_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_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_API* AsPPB_VideoDecoder_API() OVERRIDE;
  38
  39   // PPB_VideoDecoder_API implementation.
  40   virtual void Destroy() OVERRIDE;
  41
  42  protected:
  43   bool SetFlushCallback(scoped_refptr<TrackedCallback> callback);
  44   bool SetResetCallback(scoped_refptr<TrackedCallback> callback);
  45   bool SetBitstreamBufferCallback(int32 bitstream_buffer_id,
  46                                   scoped_refptr<TrackedCallback> callback);
  47
  48   void RunFlushCallback(int32 result);
  49   void RunResetCallback(int32 result);
  50   void RunBitstreamBufferCallback(int32 bitstream_buffer_id, int32 result);
  51
  52   // Tell command buffer to process all commands it has received so far.
  53   void FlushCommandBuffer();
  54
  55   // Initialize the underlying decoder.
  56   void InitCommon(PP_Resource graphics_context,
  57                   gpu::gles2::GLES2Implementation* gles2_impl);
  58
  59  private:
  60   // Key: bitstream_buffer_id, value: callback to run when bitstream decode is
  61   // done.
  62   typedef std::map<int32, scoped_refptr<TrackedCallback> > CallbackById;
  63
  64   scoped_refptr<TrackedCallback> flush_callback_;
  65   scoped_refptr<TrackedCallback> reset_callback_;
  66   CallbackById bitstream_buffer_callbacks_;
  67
  68   // The resource ID of the underlying Graphics3D object being used.  Used only
  69   // for reference counting to keep it alive for the lifetime of |*this|.
  70   PP_Resource graphics_context_;
  71
  72   // Reference to the GLES2Implementation owned by |graphics_context_|.
  73   // Graphics3D is guaranteed to be alive for the lifetime of this class.
  74   // In the out-of-process case, Graphics3D's gles2_impl() exists in the plugin
  75   // process only, so gles2_impl_ is NULL in that case.
  76   gpu::gles2::GLES2Implementation* gles2_impl_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(PPB_VideoDecoder_Shared);
  79 };
  80
  81 }  // namespace ppapi
  82
  83 #endif  // PPAPI_SHARED_IMPL_PPB_VIDEO_DECODER_SHARED_H_