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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 
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  * Associate a VDPAU device with a codec context for hardware acceleration.
154  * This function is meant to be called from the get_format() codec callback,
155  * or earlier. It can also be called after avcodec_flush_buffers() to change
156  * the underlying VDPAU device mid-stream (e.g. to recover from non-transparent
157  * display preemption).
158  *
159  * @note get_format() must return AV_PIX_FMT_VDPAU if this function completes
160  * successfully.
161  *
162  * @param avctx decoding context whose get_format() callback is invoked
163  * @param device VDPAU device handle to use for hardware acceleration
164  * @param get_proc_address VDPAU device driver
165  * @param flags zero of more OR'd AV_HWACCEL_FLAG_* flags
166  *
167  * @return 0 on success, an AVERROR code on failure.
168  */
169 int av_vdpau_bind_context(AVCodecContext *avctx, VdpDevice device,
170  VdpGetProcAddress *get_proc_address, unsigned flags);
171 
172 /**
173  * Gets the parameters to create an adequate VDPAU video surface for the codec
174  * context using VDPAU hardware decoding acceleration.
175  *
176  * @note Behavior is undefined if the context was not successfully bound to a
177  * VDPAU device using av_vdpau_bind_context().
178  *
179  * @param avctx the codec context being used for decoding the stream
180  * @param type storage space for the VDPAU video surface chroma type
181  * (or NULL to ignore)
182  * @param width storage space for the VDPAU video surface pixel width
183  * (or NULL to ignore)
184  * @param height storage space for the VDPAU video surface pixel height
185  * (or NULL to ignore)
186  *
187  * @return 0 on success, a negative AVERROR code on failure.
188  */
189 int av_vdpau_get_surface_parameters(AVCodecContext *avctx, VdpChromaType *type,
190  uint32_t *width, uint32_t *height);
191 
192 /**
193  * Allocate an AVVDPAUContext.
194  *
195  * @return Newly-allocated AVVDPAUContext or NULL on failure.
196  */
198 
199 #if FF_API_VDPAU_PROFILE
200 /**
201  * Get a decoder profile that should be used for initializing a VDPAU decoder.
202  * Should be called from the AVCodecContext.get_format() callback.
203  *
204  * @deprecated Use av_vdpau_bind_context() instead.
205  *
206  * @param avctx the codec context being used for decoding the stream
207  * @param profile a pointer into which the result will be written on success.
208  * The contents of profile are undefined if this function returns
209  * an error.
210  *
211  * @return 0 on success (non-negative), a negative AVERROR on failure.
212  */
214 int av_vdpau_get_profile(AVCodecContext *avctx, VdpDecoderProfile *profile);
215 #endif
216 
217 #if FF_API_CAP_VDPAU
218 /** @brief The videoSurface is used for rendering. */
219 #define FF_VDPAU_STATE_USED_FOR_RENDER 1
220 
221 /**
222  * @brief The videoSurface is needed for reference/prediction.
223  * The codec manipulates this.
224  */
225 #define FF_VDPAU_STATE_USED_FOR_REFERENCE 2
226 
227 /**
228  * @brief This structure is used as a callback between the FFmpeg
229  * decoder (vd_) and presentation (vo_) module.
230  * This is used for defining a video frame containing surface,
231  * picture parameter, bitstream information etc which are passed
232  * between the FFmpeg decoder and its clients.
233  */
235  VdpVideoSurface surface; ///< Used as rendered surface, never changed.
236 
237  int state; ///< Holds FF_VDPAU_STATE_* values.
238 
239  /** picture parameter information for all supported codecs */
241 
242  /** Describe size/location of the compressed video data.
243  Set to 0 when freeing bitstream_buffers. */
246  /** The user is responsible for freeing this buffer using av_freep(). */
247  VdpBitstreamBuffer *bitstream_buffers;
248 };
249 #endif
250 
251 /* @}*/
252 
253 #endif /* AVCODEC_VDPAU_H */
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
VdpPictureInfoMPEG1Or2 mpeg
Definition: vdpau.h:63
attribute_deprecated VdpBitstreamBuffer * bitstream_buffers
Table of bitstream buffers.
Definition: vdpau.h:137
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:82
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:769
AVVDPAUContext * av_vdpau_alloc_context(void)
Allocate an AVVDPAUContext.
Definition: vdpau.c:817
attribute_deprecated int bitstream_buffers_used
Useful bitstream buffers in the bitstream buffers table.
Definition: vdpau.h:128
#define height
static int flags
Definition: log.c:57
VdpDecoder decoder
VDPAU decoder handle.
Definition: vdpau.h:96
Libavcodec version macros.
attribute_deprecated union AVVDPAUPictureInfo info
VDPAU picture information.
Definition: vdpau.h:112
VdpBitstreamBuffer * bitstream_buffers
The user is responsible for freeing this buffer using av_freep().
Definition: vdpau.h:247
This structure is used to share data between the libavcodec library and the client video application...
Definition: vdpau.h:90
uint16_t width
Definition: gdv.c:47
attribute_deprecated int bitstream_buffers_allocated
Allocated size of the bitstream_buffers table.
Definition: vdpau.h:120
union AVVDPAUPictureInfo info
picture parameter information for all supported codecs
Definition: vdpau.h:240
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:822
void av_vdpau_hwaccel_set_render2(AVVDPAUContext *, AVVDPAU_Render2)
VdpPictureInfoMPEG4Part2 mpeg4
Definition: vdpau.h:65
Libavcodec external API header.
AVVDPAUContext * av_alloc_vdpaucontext(void)
allocation function for AVVDPAUContext
Definition: vdpau.c:75
main external API structure.
Definition: avcodec.h:1761
int bitstream_buffers_used
Definition: vdpau.h:245
GLint GLenum type
Definition: opengl_enc.c:105
int bitstream_buffers_allocated
Describe size/location of the compressed video data.
Definition: vdpau.h:244
VdpDecoderRender * render
VDPAU decoder render callback.
Definition: vdpau.h:103
int state
Holds FF_VDPAU_STATE_* values.
Definition: vdpau.h:237
int(* AVVDPAU_Render2)(struct AVCodecContext *, struct AVFrame *, const VdpPictureInfo *, uint32_t, const VdpBitstreamBuffer *)
Definition: vdpau.h:72
mfxU16 profile
Definition: qsvenc.c:44
#define attribute_deprecated
Definition: attributes.h:94
int
AVVDPAU_Render2 render2
Definition: vdpau.h:139
VdpPictureInfoH264 h264
Definition: vdpau.h:62
This structure is used as a callback between the FFmpeg decoder (vd_) and presentation (vo_) module...
Definition: vdpau.h:234
VdpPictureInfoVC1 vc1
Definition: vdpau.h:64
VdpVideoSurface surface
Used as rendered surface, never changed.
Definition: vdpau.h:235