FFmpeg
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 
54 #include "libavutil/avconfig.h"
55 #include "libavutil/attributes.h"
56 
57 #include "avcodec.h"
58 #include "version.h"
59 
60 struct AVCodecContext;
61 struct AVFrame;
62 
63 typedef int (*AVVDPAU_Render2)(struct AVCodecContext *, struct AVFrame *,
64  const VdpPictureInfo *, uint32_t,
65  const VdpBitstreamBuffer *);
66 
67 /**
68  * This structure is used to share data between the libavcodec library and
69  * the client video application.
70  * The user shall allocate the structure via the av_alloc_vdpau_hwaccel
71  * function and make it available as
72  * AVCodecContext.hwaccel_context. Members can be set by the user once
73  * during initialization or through each AVCodecContext.get_buffer()
74  * function call. In any case, they must be valid prior to calling
75  * decoding functions.
76  *
77  * The size of this structure is not a part of the public ABI and must not
78  * be used outside of libavcodec. Use av_vdpau_alloc_context() to allocate an
79  * AVVDPAUContext.
80  */
81 typedef struct AVVDPAUContext {
82  /**
83  * VDPAU decoder handle
84  *
85  * Set by user.
86  */
87  VdpDecoder decoder;
88 
89  /**
90  * VDPAU decoder render callback
91  *
92  * Set by the user.
93  */
94  VdpDecoderRender *render;
95 
98 
99 /**
100  * @brief allocation function for AVVDPAUContext
101  *
102  * Allows extending the struct without breaking API/ABI
103  */
105 
108 
109 /**
110  * Associate a VDPAU device with a codec context for hardware acceleration.
111  * This function is meant to be called from the get_format() codec callback,
112  * or earlier. It can also be called after avcodec_flush_buffers() to change
113  * the underlying VDPAU device mid-stream (e.g. to recover from non-transparent
114  * display preemption).
115  *
116  * @note get_format() must return AV_PIX_FMT_VDPAU if this function completes
117  * successfully.
118  *
119  * @param avctx decoding context whose get_format() callback is invoked
120  * @param device VDPAU device handle to use for hardware acceleration
121  * @param get_proc_address VDPAU device driver
122  * @param flags zero of more OR'd AV_HWACCEL_FLAG_* flags
123  *
124  * @return 0 on success, an AVERROR code on failure.
125  */
126 int av_vdpau_bind_context(AVCodecContext *avctx, VdpDevice device,
127  VdpGetProcAddress *get_proc_address, unsigned flags);
128 
129 /**
130  * Gets the parameters to create an adequate VDPAU video surface for the codec
131  * context using VDPAU hardware decoding acceleration.
132  *
133  * @note Behavior is undefined if the context was not successfully bound to a
134  * VDPAU device using av_vdpau_bind_context().
135  *
136  * @param avctx the codec context being used for decoding the stream
137  * @param type storage space for the VDPAU video surface chroma type
138  * (or NULL to ignore)
139  * @param width storage space for the VDPAU video surface pixel width
140  * (or NULL to ignore)
141  * @param height storage space for the VDPAU video surface pixel height
142  * (or NULL to ignore)
143  *
144  * @return 0 on success, a negative AVERROR code on failure.
145  */
146 int av_vdpau_get_surface_parameters(AVCodecContext *avctx, VdpChromaType *type,
147  uint32_t *width, uint32_t *height);
148 
149 /**
150  * Allocate an AVVDPAUContext.
151  *
152  * @return Newly-allocated AVVDPAUContext or NULL on failure.
153  */
155 
156 #if FF_API_VDPAU_PROFILE
157 /**
158  * Get a decoder profile that should be used for initializing a VDPAU decoder.
159  * Should be called from the AVCodecContext.get_format() callback.
160  *
161  * @deprecated Use av_vdpau_bind_context() instead.
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  */
171 int av_vdpau_get_profile(AVCodecContext *avctx, VdpDecoderProfile *profile);
172 #endif
173 
174 /* @}*/
175 
176 #endif /* AVCODEC_VDPAU_H */
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
GLint GLenum type
Definition: opengl_enc.c:104
Macro definitions for various function/variable attributes.
int av_vdpau_get_surface_parameters(AVCodecContext *avctx, VdpChromaType *type, uint32_t *width, uint32_t *height)
Gets the parameters to create an adequate VDPAU video surface for the codec context using VDPAU hardw...
Definition: vdpau.c:74
AVVDPAU_Render2 av_vdpau_hwaccel_get_render2(const AVVDPAUContext *)
attribute_deprecated int av_vdpau_get_profile(AVCodecContext *avctx, VdpDecoderProfile *profile)
Get a decoder profile that should be used for initializing a VDPAU decoder.
Definition: vdpau.c:397
AVVDPAUContext * av_vdpau_alloc_context(void)
Allocate an AVVDPAUContext.
Definition: vdpau.c:445
#define height
VdpDecoder decoder
VDPAU decoder handle.
Definition: vdpau.h:87
Libavcodec version macros.
int(* AVVDPAU_Render2)(struct AVCodecContext *, struct AVFrame *, const VdpPictureInfo *, uint32_t, const VdpBitstreamBuffer *)
Definition: vdpau.h:63
This structure is used to share data between the libavcodec library and the client video application...
Definition: vdpau.h:81
#define width
int av_vdpau_bind_context(AVCodecContext *avctx, VdpDevice device, VdpGetProcAddress *get_proc_address, unsigned flags)
Associate a VDPAU device with a codec context for hardware acceleration.
Definition: vdpau.c:450
void av_vdpau_hwaccel_set_render2(AVVDPAUContext *, AVVDPAU_Render2)
Libavcodec external API header.
AVVDPAUContext * av_alloc_vdpaucontext(void)
allocation function for AVVDPAUContext
Definition: vdpau.c:67
main external API structure.
Definition: avcodec.h:1568
VdpDecoderRender * render
VDPAU decoder render callback.
Definition: vdpau.h:94
mfxU16 profile
Definition: qsvenc.c:44
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define attribute_deprecated
Definition: attributes.h:94
int
AVVDPAU_Render2 render2
Definition: vdpau.h:96