60 lines
2 KiB
C
60 lines
2 KiB
C
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/*
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* thirdpel DSP functions
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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/**
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* @file
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* thirdpel DSP functions
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*/
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#ifndef AVCODEC_TPELDSP_H
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#define AVCODEC_TPELDSP_H
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#include <stdint.h>
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/* add and put pixel (decoding) */
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// blocksizes for hpel_pixels_func are 8x4,8x8 16x8 16x16
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// h for hpel_pixels_func is limited to {width/2, width} but never larger
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// than 16 and never smaller than 4
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typedef void (*tpel_mc_func)(uint8_t *block /* align width (8 or 16) */,
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const uint8_t *pixels /* align 1 */,
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int line_size, int w, int h);
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/**
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* thirdpel DSP context
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*/
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typedef struct TpelDSPContext {
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/**
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* Thirdpel motion compensation with rounding (a + b + 1) >> 1.
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* this is an array[12] of motion compensation functions for the
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* 9 thirdpel positions<br>
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* *pixels_tab[xthirdpel + 4 * ythirdpel]
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* @param block destination where the result is stored
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* @param pixels source
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* @param line_size number of bytes in a horizontal line of block
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* @param h height
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*/
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tpel_mc_func put_tpel_pixels_tab[11]; // FIXME individual func ptr per width?
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tpel_mc_func avg_tpel_pixels_tab[11]; // FIXME individual func ptr per width?
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} TpelDSPContext;
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void ff_tpeldsp_init(TpelDSPContext *c);
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#endif /* AVCODEC_TPELDSP_H */
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