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comparison lib/libavcodec/vdpau.h @ 2134:992d2e6f907d

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preparation for libavcodec
author zipi
date Tue, 31 Dec 2013 14:52:14 +0000
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2133:e378232bfd36 2134:992d2e6f907d
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
56 union FFVdpPictureInfo {
57 VdpPictureInfoH264 h264;
58 VdpPictureInfoMPEG1Or2 mpeg;
59 VdpPictureInfoVC1 vc1;
60 VdpPictureInfoMPEG4Part2 mpeg4;
61 };
62
63 /**
64 * This structure is used to share data between the libavcodec library and
65 * the client video application.
66 * The user shall zero-allocate the structure and make it available as
67 * AVCodecContext.hwaccel_context. Members can be set by the user once
68 * during initialization or through each AVCodecContext.get_buffer()
69 * function call. In any case, they must be valid prior to calling
70 * decoding functions.
71 */
72 typedef struct AVVDPAUContext {
73 /**
74 * VDPAU decoder handle
75 *
76 * Set by user.
77 */
78 VdpDecoder decoder;
79
80 /**
81 * VDPAU decoder render callback
82 *
83 * Set by the user.
84 */
85 VdpDecoderRender *render;
86
87 /**
88 * VDPAU picture information
89 *
90 * Set by libavcodec.
91 */
92 union FFVdpPictureInfo info;
93
94 /**
95 * Allocated size of the bitstream_buffers table.
96 *
97 * Set by libavcodec.
98 */
99 int bitstream_buffers_allocated;
100
101 /**
102 * Useful bitstream buffers in the bitstream buffers table.
103 *
104 * Set by libavcodec.
105 */
106 int bitstream_buffers_used;
107
108 /**
109 * Table of bitstream buffers.
110 * The user is responsible for freeing this buffer using av_freep().
111 *
112 * Set by libavcodec.
113 */
114 VdpBitstreamBuffer *bitstream_buffers;
115 } AVVDPAUContext;
116
117
118 /** @brief The videoSurface is used for rendering. */
119 #define FF_VDPAU_STATE_USED_FOR_RENDER 1
120
121 /**
122 * @brief The videoSurface is needed for reference/prediction.
123 * The codec manipulates this.
124 */
125 #define FF_VDPAU_STATE_USED_FOR_REFERENCE 2
126
127 /**
128 * @brief This structure is used as a callback between the FFmpeg
129 * decoder (vd_) and presentation (vo_) module.
130 * This is used for defining a video frame containing surface,
131 * picture parameter, bitstream information etc which are passed
132 * between the FFmpeg decoder and its clients.
133 */
134 struct vdpau_render_state {
135 VdpVideoSurface surface; ///< Used as rendered surface, never changed.
136
137 int state; ///< Holds FF_VDPAU_STATE_* values.
138
139 #if AV_HAVE_INCOMPATIBLE_FORK_ABI
140 /** picture parameter information for all supported codecs */
141 union FFVdpPictureInfo info;
142 #endif
143
144 /** Describe size/location of the compressed video data.
145 Set to 0 when freeing bitstream_buffers. */
146 int bitstream_buffers_allocated;
147 int bitstream_buffers_used;
148 /** The user is responsible for freeing this buffer using av_freep(). */
149 VdpBitstreamBuffer *bitstream_buffers;
150
151 #if !AV_HAVE_INCOMPATIBLE_FORK_ABI
152 /** picture parameter information for all supported codecs */
153 union FFVdpPictureInfo info;
154 #endif
155 };
156
157 /* @}*/
158
159 #endif /* AVCODEC_VDPAU_H */