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>
53 #include <vdpau/vdpau_x11.h>
54 #include "libavutil/avconfig.h"
55 #include "libavutil/attributes.h"
61 union AVVDPAUPictureInfo {
62 VdpPictureInfoH264 h264;
63 VdpPictureInfoMPEG1Or2 mpeg;
64 VdpPictureInfoVC1 vc1;
65 VdpPictureInfoMPEG4Part2 mpeg4;
69 struct AVCodecContext;
72 typedef int (*AVVDPAU_Render2)(struct AVCodecContext *, struct AVFrame *,
73 const VdpPictureInfo *, uint32_t,
74 const VdpBitstreamBuffer *);
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
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
90 typedef struct AVVDPAUContext {
92 * VDPAU decoder handle
99 * VDPAU decoder render callback
103 VdpDecoderRender *render;
105 #if FF_API_BUFS_VDPAU
107 * VDPAU picture information
112 union AVVDPAUPictureInfo info;
115 * Allocated size of the bitstream_buffers table.
120 int bitstream_buffers_allocated;
123 * Useful bitstream buffers in the bitstream buffers table.
128 int bitstream_buffers_used;
131 * Table of bitstream buffers.
132 * The user is responsible for freeing this buffer using av_freep().
137 VdpBitstreamBuffer *bitstream_buffers;
139 AVVDPAU_Render2 render2;
143 * @brief allocation function for AVVDPAUContext
145 * Allows extending the struct without breaking API/ABI
147 AVVDPAUContext *av_alloc_vdpaucontext(void);
149 AVVDPAU_Render2 av_vdpau_hwaccel_get_render2(const AVVDPAUContext *);
150 void av_vdpau_hwaccel_set_render2(AVVDPAUContext *, AVVDPAU_Render2);
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).
159 * @note get_format() must return AV_PIX_FMT_VDPAU if this function completes
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
167 * @return 0 on success, an AVERROR code on failure.
169 int av_vdpau_bind_context(AVCodecContext *avctx, VdpDevice device,
170 VdpGetProcAddress *get_proc_address, unsigned flags);
173 * Gets the parameters to create an adequate VDPAU video surface for the codec
174 * context using VDPAU hardware decoding acceleration.
176 * @note Behavior is undefined if the context was not successfully bound to a
177 * VDPAU device using av_vdpau_bind_context().
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)
187 * @return 0 on success, a negative AVERROR code on failure.
189 int av_vdpau_get_surface_parameters(AVCodecContext *avctx, VdpChromaType *type,
190 uint32_t *width, uint32_t *height);
193 * Allocate an AVVDPAUContext.
195 * @return Newly-allocated AVVDPAUContext or NULL on failure.
197 AVVDPAUContext *av_vdpau_alloc_context(void);
200 * Get a decoder profile that should be used for initializing a VDPAU decoder.
201 * Should be called from the AVCodecContext.get_format() callback.
203 * @param avctx the codec context being used for decoding the stream
204 * @param profile a pointer into which the result will be written on success.
205 * The contents of profile are undefined if this function returns
208 * @return 0 on success (non-negative), a negative AVERROR on failure.
210 int av_vdpau_get_profile(AVCodecContext *avctx, VdpDecoderProfile *profile);
213 /** @brief The videoSurface is used for rendering. */
214 #define FF_VDPAU_STATE_USED_FOR_RENDER 1
217 * @brief The videoSurface is needed for reference/prediction.
218 * The codec manipulates this.
220 #define FF_VDPAU_STATE_USED_FOR_REFERENCE 2
223 * @brief This structure is used as a callback between the FFmpeg
224 * decoder (vd_) and presentation (vo_) module.
225 * This is used for defining a video frame containing surface,
226 * picture parameter, bitstream information etc which are passed
227 * between the FFmpeg decoder and its clients.
229 struct vdpau_render_state {
230 VdpVideoSurface surface; ///< Used as rendered surface, never changed.
232 int state; ///< Holds FF_VDPAU_STATE_* values.
234 #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI
235 /** picture parameter information for all supported codecs */
236 union AVVDPAUPictureInfo info;
239 /** Describe size/location of the compressed video data.
240 Set to 0 when freeing bitstream_buffers. */
241 int bitstream_buffers_allocated;
242 int bitstream_buffers_used;
243 /** The user is responsible for freeing this buffer using av_freep(). */
244 VdpBitstreamBuffer *bitstream_buffers;
246 #if !AV_HAVE_INCOMPATIBLE_LIBAV_ABI
247 /** picture parameter information for all supported codecs */
248 union AVVDPAUPictureInfo info;
255 #endif /* AVCODEC_VDPAU_H */