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
22namespace base {
23class SharedMemory;
24}
25
26namespace content {
27
28class PPB_Graphics3D_Impl;
29class RendererPpapiHost;
30class RenderViewImpl;
31class VideoDecoderShim;
32
33class 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_
129