1 /* 2 * Copyright (C) 2003 Ivan Kalvachev 3 * 4 * This file is part of FFmpeg. 5 * 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. 10 * 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. 15 * 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 19 */ 20 21 #ifndef AVCODEC_XVMC_H 22 #define AVCODEC_XVMC_H 23 24 /** 25 * @file 26 * @ingroup lavc_codec_hwaccel_xvmc 27 * Public libavcodec XvMC header. 28 */ 29 30 #include <X11/extensions/XvMC.h> 31 32 #include "libavutil/attributes.h" 33 #include "version.h" 34 #include "avcodec.h" 35 36 /** 37 * @defgroup lavc_codec_hwaccel_xvmc XvMC 38 * @ingroup lavc_codec_hwaccel 39 * 40 * @{ 41 */ 42 43 #define AV_XVMC_ID 0x1DC711C0 /**< special value to ensure that regular pixel routines haven't corrupted the struct 44 the number is 1337 speak for the letters IDCT MCo (motion compensation) */ 45 46 struct attribute_deprecated xvmc_pix_fmt { 47 /** The field contains the special constant value AV_XVMC_ID. 48 It is used as a test that the application correctly uses the API, 49 and that there is no corruption caused by pixel routines. 50 - application - set during initialization 51 - libavcodec - unchanged 52 */ 53 int xvmc_id; 54 55 /** Pointer to the block array allocated by XvMCCreateBlocks(). 56 The array has to be freed by XvMCDestroyBlocks(). 57 Each group of 64 values represents one data block of differential 58 pixel information (in MoCo mode) or coefficients for IDCT. 59 - application - set the pointer during initialization 60 - libavcodec - fills coefficients/pixel data into the array 61 */ 62 short* data_blocks; 63 64 /** Pointer to the macroblock description array allocated by 65 XvMCCreateMacroBlocks() and freed by XvMCDestroyMacroBlocks(). 66 - application - set the pointer during initialization 67 - libavcodec - fills description data into the array 68 */ 69 XvMCMacroBlock* mv_blocks; 70 71 /** Number of macroblock descriptions that can be stored in the mv_blocks 72 array. 73 - application - set during initialization 74 - libavcodec - unchanged 75 */ 76 int allocated_mv_blocks; 77 78 /** Number of blocks that can be stored at once in the data_blocks array. 79 - application - set during initialization 80 - libavcodec - unchanged 81 */ 82 int allocated_data_blocks; 83 84 /** Indicate that the hardware would interpret data_blocks as IDCT 85 coefficients and perform IDCT on them. 86 - application - set during initialization 87 - libavcodec - unchanged 88 */ 89 int idct; 90 91 /** In MoCo mode it indicates that intra macroblocks are assumed to be in 92 unsigned format; same as the XVMC_INTRA_UNSIGNED flag. 93 - application - set during initialization 94 - libavcodec - unchanged 95 */ 96 int unsigned_intra; 97 98 /** Pointer to the surface allocated by XvMCCreateSurface(). 99 It has to be freed by XvMCDestroySurface() on application exit. 100 It identifies the frame and its state on the video hardware. 101 - application - set during initialization 102 - libavcodec - unchanged 103 */ 104 XvMCSurface* p_surface; 105 106 /** Set by the decoder before calling ff_draw_horiz_band(), 107 needed by the XvMCRenderSurface function. */ 108 //@{ 109 /** Pointer to the surface used as past reference 110 - application - unchanged 111 - libavcodec - set 112 */ 113 XvMCSurface* p_past_surface; 114 115 /** Pointer to the surface used as future reference 116 - application - unchanged 117 - libavcodec - set 118 */ 119 XvMCSurface* p_future_surface; 120 121 /** top/bottom field or frame 122 - application - unchanged 123 - libavcodec - set 124 */ 125 unsigned int picture_structure; 126 127 /** XVMC_SECOND_FIELD - 1st or 2nd field in the sequence 128 - application - unchanged 129 - libavcodec - set 130 */ 131 unsigned int flags; 132 //}@ 133 134 /** Number of macroblock descriptions in the mv_blocks array 135 that have already been passed to the hardware. 136 - application - zeroes it on get_buffer(). 137 A successful ff_draw_horiz_band() may increment it 138 with filled_mb_block_num or zero both. 139 - libavcodec - unchanged 140 */ 141 int start_mv_blocks_num; 142 143 /** Number of new macroblock descriptions in the mv_blocks array (after 144 start_mv_blocks_num) that are filled by libavcodec and have to be 145 passed to the hardware. 146 - application - zeroes it on get_buffer() or after successful 147 ff_draw_horiz_band(). 148 - libavcodec - increment with one of each stored MB 149 */ 150 int filled_mv_blocks_num; 151 152 /** Number of the next free data block; one data block consists of 153 64 short values in the data_blocks array. 154 All blocks before this one have already been claimed by placing their 155 position into the corresponding block description structure field, 156 that are part of the mv_blocks array. 157 - application - zeroes it on get_buffer(). 158 A successful ff_draw_horiz_band() may zero it together 159 with start_mb_blocks_num. 160 - libavcodec - each decoded macroblock increases it by the number 161 of coded blocks it contains. 162 */ 163 int next_free_data_block_num; 164 }; 165 166 /** 167 * @} 168 */ 169 170 #endif /* AVCODEC_XVMC_H */ 171