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 Libav.
9 * Libav 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 * Libav 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 Libav; 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 Libav
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/attributes.h"
60 union AVVDPAUPictureInfo {
61 VdpPictureInfoH264 h264;
62 VdpPictureInfoMPEG1Or2 mpeg;
63 VdpPictureInfoVC1 vc1;
64 VdpPictureInfoMPEG4Part2 mpeg4;
69 * This structure is used to share data between the libavcodec library and
70 * the client video application.
71 * The user shall zero-allocate the structure 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;
98 * VDPAU picture information
103 union AVVDPAUPictureInfo info;
106 * Allocated size of the bitstream_buffers table.
111 int bitstream_buffers_allocated;
114 * Useful bitstream buffers in the bitstream buffers table.
119 int bitstream_buffers_used;
122 * Table of bitstream buffers.
123 * The user is responsible for freeing this buffer using av_freep().
128 VdpBitstreamBuffer *bitstream_buffers;
133 * Associate a VDPAU device with a codec context for hardware acceleration.
134 * This function is meant to be called from the get_format() codec callback,
135 * or earlier. It can also be called after avcodec_flush_buffers() to change
136 * the underlying VDPAU device mid-stream (e.g. to recover from non-transparent
137 * display preemption).
139 * @note get_format() must return AV_PIX_FMT_VDPAU if this function completes
142 * @param avctx decoding context whose get_format() callback is invoked
143 * @param device VDPAU device handle to use for hardware acceleration
144 * @param get_proc_address VDPAU device driver
145 * @param flags zero of more OR'd AV_HWACCEL_FLAG_* flags
147 * @return 0 on success, an AVERROR code on failure.
149 int av_vdpau_bind_context(AVCodecContext *avctx, VdpDevice device,
150 VdpGetProcAddress *get_proc_address, unsigned flags);
153 * Gets the parameters to create an adequate VDPAU video surface for the codec
154 * context using VDPAU hardware decoding acceleration.
156 * @note Behavior is undefined if the context was not successfully bound to a
157 * VDPAU device using av_vdpau_bind_context().
159 * @param avctx the codec context being used for decoding the stream
160 * @param type storage space for the VDPAU video surface chroma type
161 * (or NULL to ignore)
162 * @param width storage space for the VDPAU video surface pixel width
163 * (or NULL to ignore)
164 * @param height storage space for the VDPAU video surface pixel height
165 * (or NULL to ignore)
167 * @return 0 on success, a negative AVERROR code on failure.
169 int av_vdpau_get_surface_parameters(AVCodecContext *avctx, VdpChromaType *type,
170 uint32_t *width, uint32_t *height);
173 * Allocate an AVVDPAUContext.
175 * @return Newly-allocated AVVDPAUContext or NULL on failure.
177 AVVDPAUContext *av_vdpau_alloc_context(void);
179 #if FF_API_VDPAU_PROFILE
181 * Get a decoder profile that should be used for initializing a VDPAU decoder.
182 * Should be called from the AVCodecContext.get_format() callback.
184 * @deprecated Use av_vdpau_bind_context() instead.
186 * @param avctx the codec context being used for decoding the stream
187 * @param profile a pointer into which the result will be written on success.
188 * The contents of profile are undefined if this function returns
191 * @return 0 on success (non-negative), a negative AVERROR on failure.
194 int av_vdpau_get_profile(AVCodecContext *avctx, VdpDecoderProfile *profile);
198 /** @brief The videoSurface is used for rendering. */
199 #define FF_VDPAU_STATE_USED_FOR_RENDER 1
202 * @brief The videoSurface is needed for reference/prediction.
203 * The codec manipulates this.
205 #define FF_VDPAU_STATE_USED_FOR_REFERENCE 2
208 * @brief This structure is used as a callback between the Libav
209 * decoder (vd_) and presentation (vo_) module.
210 * This is used for defining a video frame containing surface,
211 * picture parameter, bitstream information etc which are passed
212 * between the Libav decoder and its clients.
214 struct vdpau_render_state {
215 VdpVideoSurface surface; ///< Used as rendered surface, never changed.
217 int state; ///< Holds FF_VDPAU_STATE_* values.
219 /** picture parameter information for all supported codecs */
220 union AVVDPAUPictureInfo info;
222 /** Describe size/location of the compressed video data.
223 Set to 0 when freeing bitstream_buffers. */
224 int bitstream_buffers_allocated;
225 int bitstream_buffers_used;
226 /** The user is responsible for freeing this buffer using av_freep(). */
227 VdpBitstreamBuffer *bitstream_buffers;
233 #endif /* AVCODEC_VDPAU_H */