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vdpau.h
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1 /*
2  * The Video Decode and Presentation API for UNIX (VDPAU) is used for
3  * hardware-accelerated decoding of MPEG-1/2, H.264 and VC-1.
4  *
5  * Copyright (C) 2008 NVIDIA
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_VDPAU_H
25 #define AVCODEC_VDPAU_H
26 
27 /**
28  * @file
29  * @ingroup lavc_codec_hwaccel_vdpau
30  * Public libavcodec VDPAU header.
31  */
32 
33 
34 /**
35  * @defgroup lavc_codec_hwaccel_vdpau VDPAU Decoder and Renderer
36  * @ingroup lavc_codec_hwaccel
37  *
38  * VDPAU hardware acceleration has two modules
39  * - VDPAU decoding
40  * - VDPAU presentation
41  *
42  * The VDPAU decoding module parses all headers using FFmpeg
43  * parsing mechanisms and uses VDPAU for the actual decoding.
44  *
45  * As per the current implementation, the actual decoding
46  * and rendering (API calls) are done as part of the VDPAU
47  * presentation (vo_vdpau.c) module.
48  *
49  * @{
50  */
51 
52 #include <vdpau/vdpau.h>
53 #include <vdpau/vdpau_x11.h>
54 #include "libavutil/avconfig.h"
55 #include "libavutil/attributes.h"
56 
57 #include "avcodec.h"
58 #include "version.h"
59 
60 #if FF_API_BUFS_VDPAU
62  VdpPictureInfoH264 h264;
63  VdpPictureInfoMPEG1Or2 mpeg;
64  VdpPictureInfoVC1 vc1;
65  VdpPictureInfoMPEG4Part2 mpeg4;
66 };
67 #endif
68 
69 struct AVCodecContext;
70 struct AVFrame;
71 
72 typedef int (*AVVDPAU_Render2)(struct AVCodecContext *, struct AVFrame *,
73  const VdpPictureInfo *, uint32_t,
74  const VdpBitstreamBuffer *);
75 
76 /**
77  * This structure is used to share data between the libavcodec library and
78  * the client video application.
79  * The user shall allocate the structure via the av_alloc_vdpau_hwaccel
80  * function and make it available as
81  * AVCodecContext.hwaccel_context. Members can be set by the user once
82  * during initialization or through each AVCodecContext.get_buffer()
83  * function call. In any case, they must be valid prior to calling
84  * decoding functions.
85  *
86  * The size of this structure is not a part of the public ABI and must not
87  * be used outside of libavcodec. Use av_vdpau_alloc_context() to allocate an
88  * AVVDPAUContext.
89  */
90 typedef struct AVVDPAUContext {
91  /**
92  * VDPAU decoder handle
93  *
94  * Set by user.
95  */
96  VdpDecoder decoder;
97 
98  /**
99  * VDPAU decoder render callback
100  *
101  * Set by the user.
102  */
103  VdpDecoderRender *render;
104 
105 #if FF_API_BUFS_VDPAU
106  /**
107  * VDPAU picture information
108  *
109  * Set by libavcodec.
110  */
113 
114  /**
115  * Allocated size of the bitstream_buffers table.
116  *
117  * Set by libavcodec.
118  */
121 
122  /**
123  * Useful bitstream buffers in the bitstream buffers table.
124  *
125  * Set by libavcodec.
126  */
129 
130  /**
131  * Table of bitstream buffers.
132  * The user is responsible for freeing this buffer using av_freep().
133  *
134  * Set by libavcodec.
135  */
137  VdpBitstreamBuffer *bitstream_buffers;
138 #endif
141 
142 /**
143  * @brief allocation function for AVVDPAUContext
144  *
145  * Allows extending the struct without breaking API/ABI
146  */
148 
151 
152 /**
153  * Allocate an AVVDPAUContext.
154  *
155  * @return Newly-allocated AVVDPAUContext or NULL on failure.
156  */
158 
159 /**
160  * Get a decoder profile that should be used for initializing a VDPAU decoder.
161  * Should be called from the AVCodecContext.get_format() callback.
162  *
163  * @param avctx the codec context being used for decoding the stream
164  * @param profile a pointer into which the result will be written on success.
165  * The contents of profile are undefined if this function returns
166  * an error.
167  *
168  * @return 0 on success (non-negative), a negative AVERROR on failure.
169  */
170 int av_vdpau_get_profile(AVCodecContext *avctx, VdpDecoderProfile *profile);
171 
172 #if FF_API_CAP_VDPAU
173 /** @brief The videoSurface is used for rendering. */
174 #define FF_VDPAU_STATE_USED_FOR_RENDER 1
175 
176 /**
177  * @brief The videoSurface is needed for reference/prediction.
178  * The codec manipulates this.
179  */
180 #define FF_VDPAU_STATE_USED_FOR_REFERENCE 2
181 
182 /**
183  * @brief This structure is used as a callback between the FFmpeg
184  * decoder (vd_) and presentation (vo_) module.
185  * This is used for defining a video frame containing surface,
186  * picture parameter, bitstream information etc which are passed
187  * between the FFmpeg decoder and its clients.
188  */
190  VdpVideoSurface surface; ///< Used as rendered surface, never changed.
191 
192  int state; ///< Holds FF_VDPAU_STATE_* values.
193 
194 #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI
195  /** picture parameter information for all supported codecs */
196  union AVVDPAUPictureInfo info;
197 #endif
198 
199  /** Describe size/location of the compressed video data.
200  Set to 0 when freeing bitstream_buffers. */
203  /** The user is responsible for freeing this buffer using av_freep(). */
204  VdpBitstreamBuffer *bitstream_buffers;
205 
206 #if !AV_HAVE_INCOMPATIBLE_LIBAV_ABI
207  /** picture parameter information for all supported codecs */
209 #endif
210 };
211 #endif
212 
213 /* @}*/
214 
215 #endif /* AVCODEC_VDPAU_H */