OLD | NEW |
---|---|
(Empty) | |
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 PPAPI_PROXY_VIDEO_DECODER_RESOURCE_H_ | |
6 #define PPAPI_PROXY_VIDEO_DECODER_RESOURCE_H_ | |
7 | |
8 #include <queue> | |
9 | |
10 #include "base/containers/hash_tables.h" | |
11 #include "base/memory/ref_counted.h" | |
12 #include "base/memory/scoped_ptr.h" | |
13 #include "base/memory/scoped_vector.h" | |
14 #include "ppapi/proxy/connection.h" | |
15 #include "ppapi/proxy/plugin_resource.h" | |
16 #include "ppapi/proxy/ppapi_proxy_export.h" | |
17 #include "ppapi/shared_impl/resource.h" | |
18 #include "ppapi/shared_impl/scoped_pp_resource.h" | |
19 #include "ppapi/thunk/ppb_video_decoder_api.h" | |
20 | |
21 namespace gpu { | |
22 namespace gles2 { | |
23 class GLES2Implementation; | |
24 } | |
25 } | |
26 | |
27 namespace ppapi { | |
28 | |
29 class PPB_Graphics3D_Shared; | |
30 class TrackedCallback; | |
31 | |
32 namespace proxy { | |
33 | |
34 class PPAPI_PROXY_EXPORT VideoDecoderResource | |
35 : public PluginResource, | |
36 public thunk::PPB_VideoDecoder_API { | |
37 public: | |
38 VideoDecoderResource(Connection connection, PP_Instance instance); | |
39 virtual ~VideoDecoderResource(); | |
40 | |
41 // Resource overrides. | |
42 virtual thunk::PPB_VideoDecoder_API* AsPPB_VideoDecoder_API() OVERRIDE; | |
43 | |
44 // PPB_VideoDecoder_API implementation. | |
45 virtual int32_t Initialize(PP_Resource graphics_context, | |
46 PP_VideoProfile profile, | |
47 PP_Bool allow_software_fallback, | |
48 scoped_refptr<TrackedCallback> callback) OVERRIDE; | |
49 virtual int32_t Decode(uint32_t decode_id, | |
50 uint32_t size, | |
51 const void* buffer, | |
52 scoped_refptr<TrackedCallback> callback) OVERRIDE; | |
53 virtual int32_t GetPicture(PP_VideoPicture* picture, | |
54 scoped_refptr<TrackedCallback> callback) OVERRIDE; | |
55 virtual void RecyclePicture(const PP_VideoPicture* picture) OVERRIDE; | |
56 virtual int32_t Flush(scoped_refptr<TrackedCallback> callback) OVERRIDE; | |
57 virtual int32_t Reset(scoped_refptr<TrackedCallback> callback) OVERRIDE; | |
58 | |
59 // PluginResource implementation. | |
60 virtual void OnReplyReceived(const ResourceMessageReplyParams& params, | |
61 const IPC::Message& msg) OVERRIDE; | |
62 | |
63 // Called only by unit tests. This bypasses Graphics3D setup, which doesn't | |
64 // work in ppapi::proxy::PluginProxyTest. | |
65 void SetForTest(); | |
66 | |
67 private: | |
68 // Struct to hold a shared memory buffer. | |
69 struct ShmBuffer { | |
70 ShmBuffer(scoped_ptr<base::SharedMemory> shm, | |
71 uint32_t size, | |
72 uint32_t shm_id); | |
73 ~ShmBuffer(); | |
74 | |
75 scoped_ptr<base::SharedMemory> shm; | |
76 void* addr; | |
77 // Index into shm_buffers_ vector, used as an id. This should map 1:1 to | |
78 // the index on the host side of the proxy. | |
79 uint32_t shm_id; | |
80 }; | |
81 | |
82 // Struct to hold texture information. | |
83 struct Texture { | |
84 Texture(uint32_t texture_target, const PP_Size& size); | |
85 ~Texture(); | |
86 | |
87 uint32_t texture_target; | |
88 PP_Size size; | |
89 }; | |
90 | |
91 // Struct to hold a picture received from the decoder. | |
92 struct Picture { | |
93 Picture(int32_t decode_id, uint32_t texture_id); | |
94 ~Picture(); | |
95 | |
96 uint32_t decode_id; | |
97 uint32_t texture_id; | |
98 }; | |
99 | |
100 int32_t InitializeInternal(PP_Resource graphics_context, | |
101 PP_VideoProfile profile, | |
102 PP_Bool allow_software_fallback, | |
103 scoped_refptr<TrackedCallback> callback, | |
104 bool testing); | |
105 | |
106 // Unsolicited reply message handlers. | |
107 void OnPluginMsgRequestTextures(const ResourceMessageReplyParams& params, | |
108 uint32_t num_textures, | |
109 const PP_Size& size, | |
110 uint32_t texture_target); | |
111 void OnPluginMsgPictureReady(const ResourceMessageReplyParams& params, | |
112 uint32_t decode_id, | |
113 uint32_t texture_id); | |
114 void OnPluginMsgDismissPicture(const ResourceMessageReplyParams& params, | |
115 uint32_t texture_id); | |
116 void OnPluginMsgNotifyError(const ResourceMessageReplyParams& params, | |
117 int32_t error); | |
118 | |
119 // Reply message handlers for operations that are done in the host. | |
120 void OnPluginMsgInitializeComplete(const ResourceMessageReplyParams& params); | |
121 void OnPluginMsgDecodeComplete(const ResourceMessageReplyParams& params, | |
122 uint32_t shm_id); | |
123 void OnPluginMsgFlushComplete(const ResourceMessageReplyParams& params); | |
124 void OnPluginMsgResetComplete(const ResourceMessageReplyParams& params); | |
125 | |
126 void RunDecodeCallback(int32_t result); | |
127 void DeleteGLTexture(uint32_t texture_id); | |
128 void WriteNextPicture(PP_VideoPicture* picture); | |
129 | |
130 // ScopedVector to own the shared memory buffers. | |
131 ScopedVector<ShmBuffer> shm_buffers_; | |
132 | |
133 // List of available shared memory buffers. | |
134 typedef std::vector<ShmBuffer*> ShmBufferList; | |
135 ShmBufferList available_shm_buffers_; | |
136 | |
137 // Map of GL texture id to texture info. | |
138 typedef base::hash_map<uint32_t, Texture> TextureMap; | |
139 TextureMap textures_; | |
140 | |
141 // Queue of received pictures. | |
142 typedef std::queue<Picture> PictureQueue; | |
143 PictureQueue received_pictures_; | |
144 | |
145 // Pending callbacks. | |
146 scoped_refptr<TrackedCallback> initialize_callback_; | |
147 scoped_refptr<TrackedCallback> decode_callback_; | |
148 scoped_refptr<TrackedCallback> get_picture_callback_; | |
149 scoped_refptr<TrackedCallback> flush_callback_; | |
150 scoped_refptr<TrackedCallback> reset_callback_; | |
151 | |
152 // The maximum delay (in Decode calls) before we receive a picture. If we | |
153 // haven't received a picture from a Decode call after this many successive | |
154 // calls to Decode, then we will never receive a picture from the call. | |
155 // Note that this isn't guaranteed by H264 or other codecs. In practice, this | |
156 // number is less than 16. We make it much larger just to be safe. | |
piman
2014/05/23 20:07:27
I think this has more to do with how pipelining wo
bbudge
2014/05/23 20:57:05
I chatted with Ami. Chrome uses this number to dea
| |
157 static const int kMaximumPictureDelay = 128; | |
158 // Number of Decode calls made so far. This is in sync with a counter in the | |
159 // host, and generates a uid for each decode. This number will overflow after | |
160 // 414 days, assuming 60Hz decodes. | |
161 int32_t num_decodes_; | |
162 uint32_t decode_ids_[kMaximumPictureDelay]; | |
163 | |
164 // State for pending get_picture_callback_. | |
165 PP_VideoPicture* get_picture_; | |
166 | |
167 ScopedPPResource graphics3d_; | |
168 gpu::gles2::GLES2Implementation* gles2_impl_; | |
169 | |
170 bool initialized_; | |
171 bool testing_; | |
172 int32_t decoder_last_error_; | |
173 | |
174 DISALLOW_COPY_AND_ASSIGN(VideoDecoderResource); | |
175 }; | |
176 | |
177 } // namespace proxy | |
178 } // namespace ppapi | |
179 | |
180 #endif // PPAPI_PROXY_VIDEO_DECODER_RESOURCE_H_ | |
OLD | NEW |