2 * Copyright (C) 2003 Ivan Kalvachev
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_XVMC_H
22 #define AVCODEC_XVMC_H
24 #include <X11/extensions/XvMC.h>
28 #if LIBAVCODEC_VERSION_MAJOR < 53
29 #define AV_XVMC_STATE_DISPLAY_PENDING 1 /** the surface should be shown, the video driver manipulates this */
30 #define AV_XVMC_STATE_PREDICTION 2 /** the surface is needed for prediction, the codec manipulates this */
31 #define AV_XVMC_STATE_OSD_SOURCE 4 /** the surface is needed for subpicture rendering */
33 #define AV_XVMC_ID 0x1DC711C0 /**< special value to ensure that regular pixel routines haven't corrupted the struct
34 the number is 1337 speak for the letters IDCT MCo (motion compensation) */
37 /** Set by the calling application.
38 Once set these values are not supposed to be modified.
41 /** The field contains the special constant value AV_XVMC_ID.
42 It is used as a test that the application correctly uses the API,
43 and that there is no corruption caused by pixel routines.
44 - application - set during initialization
45 - libavcodec - unchanged
49 /** Pointer to the block array allocated by XvMCCreateBlocks()
50 it contains differential pixel data (in MoCo mode)
51 or coefficients for IDCT.
52 - application - set during initialization
53 - libavcodec - unchanged
57 /** Pointer to the macroblock description array allocated by
58 XvMCCreateMacroBlocks().
59 - application - set during initialization
60 - libavcodec - unchanged
62 XvMCMacroBlock* mv_blocks;
64 /** Number of macroblock descriptions that can be stored in the mv_blocks
66 - application - set during initialization
67 - libavcodec - unchanged
69 int allocated_mv_blocks;
71 /** Number of blocks that can be stored at once in the data_blocks array.
72 - application - set during initialization
73 - libavcodec - unchanged
75 int allocated_data_blocks;
77 /** Indicates that the hardware would interpret data_blocks as IDCT
78 coefficients and perform IDCT on them.
79 - application - set during initialization
80 - libavcodec - unchanged
84 /** In MoCo mode it indicates that intra macroblocks are assumed to be in
85 unsigned format; same as the XVMC_INTRA_UNSIGNED flag.
86 - application - set during initialization
87 - libavcodec - unchanged
91 /** Pointer to the surface allocated by XvMCCreateSurface().
92 It identifies the frame and its state on the video hardware.
93 - application - set during initialization
94 - libavcodec - unchanged
96 XvMCSurface* p_surface;
99 /** Set by the decoder before calling ff_draw_horiz_band(),
100 needed by the XvMCRenderSurface function. */
102 /** Pointer to the surface used as past reference
103 - application - unchanged
106 XvMCSurface* p_past_surface;
108 /** Pointer to the surface used as future reference
109 - application - unchanged
112 XvMCSurface* p_future_surface;
114 /** top/bottom field or frame
115 - application - unchanged
118 unsigned int picture_structure;
120 /** XVMC_SECOND_FIELD - 1st or 2nd field in the sequence
121 - application - unchanged
127 /** Offset in the mv array for the current slice.
128 Macroblocks described before that offset are assumed to have already
129 been passed to the hardware.
130 - application - zeroes it on get_buffer().
131 A successful ff_draw_horiz_band() may increment it
132 with filled_mb_block_num or zero both.
133 - libavcodec - unchanged
135 int start_mv_blocks_num;
137 /** Number of mv blocks that are filled by libavcodec and have to be
138 passed to the hardware.
139 - application - zeroes it on get_buffer() or after successful
140 ff_draw_horiz_band().
141 - libavcodec - increment with one of each stored MB
143 int filled_mv_blocks_num;
145 /** Offset to the next free data block. The mv_blocks field holds a number
146 pointing to the data blocks.
147 - application - zeroes it on get_buffer() and after successful
148 ff_draw_horiz_band().
149 - libavcodec - each macroblock increases it with the number
150 of coded blocks it contains.
152 int next_free_data_block_num;
154 /** extensions may be placed here */
155 #if LIBAVCODEC_VERSION_MAJOR < 53
157 /** State - used to work around limitations in the MPlayer video system.
158 0 - Surface is not used.
159 1 - Surface is still held in application to be displayed or is
161 2 - Surface is still held in libavcodec buffer for prediction.
165 /** pointer to the surface where the subpicture is rendered */
166 void* p_osd_target_surface_render;
171 #endif /* AVCODEC_XVMC_H */