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.
5 * Copyright (C) 2008 NVIDIA
7 * This file is part of FFmpeg.
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.
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.
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
24 #ifndef AVCODEC_VDPAU_H
25 #define AVCODEC_VDPAU_H
29 * @ingroup lavc_codec_hwaccel_vdpau
30 * Public libavcodec VDPAU header.
35 * @defgroup lavc_codec_hwaccel_vdpau VDPAU Decoder and Renderer
36 * @ingroup lavc_codec_hwaccel
38 * VDPAU hardware acceleration has two modules
40 * - VDPAU presentation
42 * The VDPAU decoding module parses all headers using FFmpeg
43 * parsing mechanisms and uses VDPAU for the actual decoding.
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.
52 #include <vdpau/vdpau.h>
54 #include "libavutil/avconfig.h"
55 #include "libavutil/attributes.h"
60 struct AVCodecContext;
63 typedef int (*AVVDPAU_Render2)(struct AVCodecContext *, struct AVFrame *,
64 const VdpPictureInfo *, uint32_t,
65 const VdpBitstreamBuffer *);
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
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
81 typedef struct AVVDPAUContext {
83 * VDPAU decoder handle
90 * VDPAU decoder render callback
94 VdpDecoderRender *render;
96 AVVDPAU_Render2 render2;
100 * @brief allocation function for AVVDPAUContext
102 * Allows extending the struct without breaking API/ABI
104 AVVDPAUContext *av_alloc_vdpaucontext(void);
106 AVVDPAU_Render2 av_vdpau_hwaccel_get_render2(const AVVDPAUContext *);
107 void av_vdpau_hwaccel_set_render2(AVVDPAUContext *, AVVDPAU_Render2);
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).
116 * @note get_format() must return AV_PIX_FMT_VDPAU if this function completes
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
124 * @return 0 on success, an AVERROR code on failure.
126 int av_vdpau_bind_context(AVCodecContext *avctx, VdpDevice device,
127 VdpGetProcAddress *get_proc_address, unsigned flags);
130 * Gets the parameters to create an adequate VDPAU video surface for the codec
131 * context using VDPAU hardware decoding acceleration.
133 * @note Behavior is undefined if the context was not successfully bound to a
134 * VDPAU device using av_vdpau_bind_context().
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)
144 * @return 0 on success, a negative AVERROR code on failure.
146 int av_vdpau_get_surface_parameters(AVCodecContext *avctx, VdpChromaType *type,
147 uint32_t *width, uint32_t *height);
150 * Allocate an AVVDPAUContext.
152 * @return Newly-allocated AVVDPAUContext or NULL on failure.
154 AVVDPAUContext *av_vdpau_alloc_context(void);
156 #if FF_API_VDPAU_PROFILE
158 * Get a decoder profile that should be used for initializing a VDPAU decoder.
159 * Should be called from the AVCodecContext.get_format() callback.
161 * @deprecated Use av_vdpau_bind_context() instead.
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
168 * @return 0 on success (non-negative), a negative AVERROR on failure.
171 int av_vdpau_get_profile(AVCodecContext *avctx, VdpDecoderProfile *profile);
176 #endif /* AVCODEC_VDPAU_H */