2 * thirdpel DSP functions
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.
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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
23 * thirdpel DSP functions
26 #ifndef AVCODEC_TPELDSP_H
27 #define AVCODEC_TPELDSP_H
31 /* add and put pixel (decoding) */
32 // blocksizes for hpel_pixels_func are 8x4,8x8 16x8 16x16
33 // h for hpel_pixels_func is limited to {width/2, width} but never larger
34 // than 16 and never smaller than 4
35 typedef void (*tpel_mc_func)(uint8_t *block /* align width (8 or 16) */,
36 const uint8_t *pixels /* align 1 */,
37 int line_size, int w, int h);
40 * thirdpel DSP context
42 typedef struct TpelDSPContext {
44 * Thirdpel motion compensation with rounding (a + b + 1) >> 1.
45 * this is an array[12] of motion compensation functions for the
46 * 9 thirdpel positions<br>
47 * *pixels_tab[xthirdpel + 4 * ythirdpel]
48 * @param block destination where the result is stored
49 * @param pixels source
50 * @param line_size number of bytes in a horizontal line of block
53 tpel_mc_func put_tpel_pixels_tab[11]; // FIXME individual func ptr per width?
54 tpel_mc_func avg_tpel_pixels_tab[11]; // FIXME individual func ptr per width?
57 void ff_tpeldsp_init(TpelDSPContext *c);
59 #endif /* AVCODEC_TPELDSP_H */