author | Wuzzy <almikes@aol.com> |
Sat, 15 Apr 2017 06:52:14 +0200 | |
changeset 12256 | 789277d46784 |
parent 7813 | 7ac83d79b897 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2003 Ivan Kalvachev |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_XVMC_H |
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#define AVCODEC_XVMC_H |
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/** |
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* @file |
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* @ingroup lavc_codec_hwaccel_xvmc |
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* Public libavcodec XvMC header. |
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*/ |
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#include <X11/extensions/XvMC.h> |
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#include "avcodec.h" |
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/** |
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* @defgroup lavc_codec_hwaccel_xvmc XvMC |
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* @ingroup lavc_codec_hwaccel |
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* |
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* @{ |
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*/ |
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#define AV_XVMC_ID 0x1DC711C0 /**< special value to ensure that regular pixel routines haven't corrupted the struct |
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the number is 1337 speak for the letters IDCT MCo (motion compensation) */ |
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struct xvmc_pix_fmt { |
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/** The field contains the special constant value AV_XVMC_ID. |
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It is used as a test that the application correctly uses the API, |
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and that there is no corruption caused by pixel routines. |
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- application - set during initialization |
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- libavcodec - unchanged |
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*/ |
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int xvmc_id; |
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/** Pointer to the block array allocated by XvMCCreateBlocks(). |
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The array has to be freed by XvMCDestroyBlocks(). |
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Each group of 64 values represents one data block of differential |
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pixel information (in MoCo mode) or coefficients for IDCT. |
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- application - set the pointer during initialization |
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- libavcodec - fills coefficients/pixel data into the array |
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*/ |
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short* data_blocks; |
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/** Pointer to the macroblock description array allocated by |
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XvMCCreateMacroBlocks() and freed by XvMCDestroyMacroBlocks(). |
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- application - set the pointer during initialization |
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- libavcodec - fills description data into the array |
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*/ |
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XvMCMacroBlock* mv_blocks; |
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/** Number of macroblock descriptions that can be stored in the mv_blocks |
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array. |
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- application - set during initialization |
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- libavcodec - unchanged |
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*/ |
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int allocated_mv_blocks; |
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/** Number of blocks that can be stored at once in the data_blocks array. |
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- application - set during initialization |
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- libavcodec - unchanged |
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*/ |
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int allocated_data_blocks; |
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/** Indicate that the hardware would interpret data_blocks as IDCT |
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coefficients and perform IDCT on them. |
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- application - set during initialization |
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- libavcodec - unchanged |
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*/ |
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int idct; |
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/** In MoCo mode it indicates that intra macroblocks are assumed to be in |
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unsigned format; same as the XVMC_INTRA_UNSIGNED flag. |
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- application - set during initialization |
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- libavcodec - unchanged |
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*/ |
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int unsigned_intra; |
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/** Pointer to the surface allocated by XvMCCreateSurface(). |
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It has to be freed by XvMCDestroySurface() on application exit. |
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It identifies the frame and its state on the video hardware. |
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- application - set during initialization |
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- libavcodec - unchanged |
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*/ |
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XvMCSurface* p_surface; |
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/** Set by the decoder before calling ff_draw_horiz_band(), |
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needed by the XvMCRenderSurface function. */ |
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//@{ |
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/** Pointer to the surface used as past reference |
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- application - unchanged |
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- libavcodec - set |
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*/ |
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XvMCSurface* p_past_surface; |
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/** Pointer to the surface used as future reference |
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- application - unchanged |
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- libavcodec - set |
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*/ |
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XvMCSurface* p_future_surface; |
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/** top/bottom field or frame |
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- application - unchanged |
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- libavcodec - set |
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*/ |
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unsigned int picture_structure; |
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/** XVMC_SECOND_FIELD - 1st or 2nd field in the sequence |
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- application - unchanged |
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- libavcodec - set |
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*/ |
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unsigned int flags; |
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//}@ |
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/** Number of macroblock descriptions in the mv_blocks array |
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that have already been passed to the hardware. |
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- application - zeroes it on get_buffer(). |
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A successful ff_draw_horiz_band() may increment it |
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with filled_mb_block_num or zero both. |
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- libavcodec - unchanged |
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*/ |
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int start_mv_blocks_num; |
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/** Number of new macroblock descriptions in the mv_blocks array (after |
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start_mv_blocks_num) that are filled by libavcodec and have to be |
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passed to the hardware. |
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- application - zeroes it on get_buffer() or after successful |
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ff_draw_horiz_band(). |
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- libavcodec - increment with one of each stored MB |
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*/ |
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int filled_mv_blocks_num; |
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/** Number of the next free data block; one data block consists of |
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64 short values in the data_blocks array. |
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All blocks before this one have already been claimed by placing their |
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position into the corresponding block description structure field, |
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that are part of the mv_blocks array. |
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- application - zeroes it on get_buffer(). |
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A successful ff_draw_horiz_band() may zero it together |
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with start_mb_blocks_num. |
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- libavcodec - each decoded macroblock increases it by the number |
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of coded blocks it contains. |
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*/ |
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int next_free_data_block_num; |
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}; |
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/** |
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* @} |
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*/ |
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#endif /* AVCODEC_XVMC_H */ |