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vaapi.h
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1 /*
2  * Video Acceleration API (shared data between FFmpeg and the video player)
3  * HW decode acceleration for MPEG-2, MPEG-4, H.264 and VC-1
4  *
5  * Copyright (C) 2008-2009 Splitted-Desktop Systems
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #ifndef AVCODEC_VAAPI_H
25 #define AVCODEC_VAAPI_H
26 
27 /**
28  * @file
29  * @ingroup lavc_codec_hwaccel_vaapi
30  * Public libavcodec VA API header.
31  */
32 
33 #include <stdint.h>
34 
35 /**
36  * @defgroup lavc_codec_hwaccel_vaapi VA API Decoding
37  * @ingroup lavc_codec_hwaccel
38  * @{
39  */
40 
41 /**
42  * This structure is used to share data between the FFmpeg library and
43  * the client video application.
44  * This shall be zero-allocated and available as
45  * AVCodecContext.hwaccel_context. All user members can be set once
46  * during initialization or through each AVCodecContext.get_buffer()
47  * function call. In any case, they must be valid prior to calling
48  * decoding functions.
49  */
50 struct vaapi_context {
51  /**
52  * Window system dependent data
53  *
54  * - encoding: unused
55  * - decoding: Set by user
56  */
57  void *display;
58 
59  /**
60  * Configuration ID
61  *
62  * - encoding: unused
63  * - decoding: Set by user
64  */
65  uint32_t config_id;
66 
67  /**
68  * Context ID (video decode pipeline)
69  *
70  * - encoding: unused
71  * - decoding: Set by user
72  */
73  uint32_t context_id;
74 
75  /**
76  * VAPictureParameterBuffer ID
77  *
78  * - encoding: unused
79  * - decoding: Set by libavcodec
80  */
81  uint32_t pic_param_buf_id;
82 
83  /**
84  * VAIQMatrixBuffer ID
85  *
86  * - encoding: unused
87  * - decoding: Set by libavcodec
88  */
89  uint32_t iq_matrix_buf_id;
90 
91  /**
92  * VABitPlaneBuffer ID (for VC-1 decoding)
93  *
94  * - encoding: unused
95  * - decoding: Set by libavcodec
96  */
97  uint32_t bitplane_buf_id;
98 
99  /**
100  * Slice parameter/data buffer IDs
101  *
102  * - encoding: unused
103  * - decoding: Set by libavcodec
104  */
105  uint32_t *slice_buf_ids;
106 
107  /**
108  * Number of effective slice buffer IDs to send to the HW
109  *
110  * - encoding: unused
111  * - decoding: Set by libavcodec
112  */
113  unsigned int n_slice_buf_ids;
114 
115  /**
116  * Size of pre-allocated slice_buf_ids
117  *
118  * - encoding: unused
119  * - decoding: Set by libavcodec
120  */
121  unsigned int slice_buf_ids_alloc;
122 
123  /**
124  * Pointer to VASliceParameterBuffers
125  *
126  * - encoding: unused
127  * - decoding: Set by libavcodec
128  */
130 
131  /**
132  * Size of a VASliceParameterBuffer element
133  *
134  * - encoding: unused
135  * - decoding: Set by libavcodec
136  */
137  unsigned int slice_param_size;
138 
139  /**
140  * Size of pre-allocated slice_params
141  *
142  * - encoding: unused
143  * - decoding: Set by libavcodec
144  */
145  unsigned int slice_params_alloc;
146 
147  /**
148  * Number of slices currently filled in
149  *
150  * - encoding: unused
151  * - decoding: Set by libavcodec
152  */
153  unsigned int slice_count;
154 
155  /**
156  * Pointer to slice data buffer base
157  * - encoding: unused
158  * - decoding: Set by libavcodec
159  */
161 
162  /**
163  * Current size of slice data
164  *
165  * - encoding: unused
166  * - decoding: Set by libavcodec
167  */
168  uint32_t slice_data_size;
169 };
170 
171 /* @} */
172 
173 #endif /* AVCODEC_VAAPI_H */