content/renderer/pepper/pepper_video_decoder_host.h

   1 // Copyright (c) 2014 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 CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_DECODER_HOST_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_DECODER_HOST_H_
   7
   8 #include <map>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/containers/hash_tables.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/memory/scoped_vector.h"
  15 #include "content/common/content_export.h"
  16 #include "media/video/video_decode_accelerator.h"
  17 #include "ppapi/c/pp_codecs.h"
  18 #include "ppapi/host/host_message_context.h"
  19 #include "ppapi/host/resource_host.h"
  20 #include "ppapi/proxy/resource_message_params.h"
  21
  22 namespace base {
  23 class SharedMemory;
  24 }
  25
  26 namespace content {
  27
  28 class PPB_Graphics3D_Impl;
  29 class RendererPpapiHost;
  30 class RenderViewImpl;
  31 class VideoDecoderShim;
  32
  33 class CONTENT_EXPORT PepperVideoDecoderHost
  34     : public ppapi::host::ResourceHost,
  35       public media::VideoDecodeAccelerator::Client {
  36  public:
  37   PepperVideoDecoderHost(RendererPpapiHost* host,
  38                          PP_Instance instance,
  39                          PP_Resource resource);
  40   virtual ~PepperVideoDecoderHost();
  41
  42  private:
  43   struct PendingDecode {
  44     PendingDecode(uint32_t shm_id,
  45                   const ppapi::host::ReplyMessageContext& reply_context);
  46     ~PendingDecode();
  47
  48     const uint32_t shm_id;
  49     const ppapi::host::ReplyMessageContext reply_context;
  50   };
  51
  52   friend class VideoDecoderShim;
  53
  54   // ResourceHost implementation.
  55   virtual int32_t OnResourceMessageReceived(
  56       const IPC::Message& msg,
  57       ppapi::host::HostMessageContext* context) OVERRIDE;
  58
  59   // media::VideoDecodeAccelerator::Client implementation.
  60   virtual void ProvidePictureBuffers(uint32 requested_num_of_buffers,
  61                                      const gfx::Size& dimensions,
  62                                      uint32 texture_target) OVERRIDE;
  63   virtual void DismissPictureBuffer(int32 picture_buffer_id) OVERRIDE;
  64   virtual void PictureReady(const media::Picture& picture) OVERRIDE;
  65   virtual void NotifyEndOfBitstreamBuffer(int32 bitstream_buffer_id) OVERRIDE;
  66   virtual void NotifyFlushDone() OVERRIDE;
  67   virtual void NotifyResetDone() OVERRIDE;
  68   virtual void NotifyError(media::VideoDecodeAccelerator::Error error) OVERRIDE;
  69
  70   int32_t OnHostMsgInitialize(ppapi::host::HostMessageContext* context,
  71                               const ppapi::HostResource& graphics_context,
  72                               PP_VideoProfile profile,
  73                               PP_HardwareAcceleration acceleration);
  74   int32_t OnHostMsgGetShm(ppapi::host::HostMessageContext* context,
  75                           uint32_t shm_id,
  76                           uint32_t shm_size);
  77   int32_t OnHostMsgDecode(ppapi::host::HostMessageContext* context,
  78                           uint32_t shm_id,
  79                           uint32_t size,
  80                           int32_t decode_id);
  81   int32_t OnHostMsgAssignTextures(ppapi::host::HostMessageContext* context,
  82                                   const PP_Size& size,
  83                                   const std::vector<uint32_t>& texture_ids);
  84   int32_t OnHostMsgRecyclePicture(ppapi::host::HostMessageContext* context,
  85                                   uint32_t picture_id);
  86   int32_t OnHostMsgFlush(ppapi::host::HostMessageContext* context);
  87   int32_t OnHostMsgReset(ppapi::host::HostMessageContext* context);
  88
  89   // These methods are needed by VideoDecodeShim, to look like a
  90   // VideoDecodeAccelerator.
  91   void OnInitializeComplete(int32_t result);
  92   const uint8_t* DecodeIdToAddress(uint32_t decode_id);
  93   void RequestTextures(uint32 requested_num_of_buffers,
  94                        const gfx::Size& dimensions,
  95                        uint32 texture_target,
  96                        const std::vector<gpu::Mailbox>& mailboxes);
  97
  98   // Non-owning pointer.
  99   RendererPpapiHost* renderer_ppapi_host_;
 100
 101   scoped_ptr<media::VideoDecodeAccelerator> decoder_;
 102
 103   // A vector holding our shm buffers, in sync with a similar vector in the
 104   // resource. We use a buffer's index in these vectors as its id on both sides
 105   // of the proxy. Only add buffers or update them in place so as not to
 106   // invalidate these ids.
 107   ScopedVector<base::SharedMemory> shm_buffers_;
 108   // A vector of true/false indicating if a shm buffer is in use by the decoder.
 109   // This is parallel to |shm_buffers_|.
 110   std::vector<uint8_t> shm_buffer_busy_;
 111
 112   // Maps decode uid to PendingDecode info.
 113   typedef base::hash_map<int32_t, PendingDecode> PendingDecodeMap;
 114   PendingDecodeMap pending_decodes_;
 115
 116   ppapi::host::ReplyMessageContext flush_reply_context_;
 117   ppapi::host::ReplyMessageContext reset_reply_context_;
 118   // Only used when in software fallback mode.
 119   ppapi::host::ReplyMessageContext initialize_reply_context_;
 120
 121   bool initialized_;
 122
 123   DISALLOW_COPY_AND_ASSIGN(PepperVideoDecoderHost);
 124 };
 125
 126 }  // namespace content
 127
 128 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_DECODER_HOST_H_