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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Half-pel DSP functions. |
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| 3 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
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| 4 | * Copyright (c) 2002-2004 Michael Niedermayer |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | /** |
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| 24 | * @file |
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| 25 | * Half-pel DSP functions. |
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| 26 | */ |
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| 27 | |||
| 28 | #ifndef AVCODEC_HPELDSP_H |
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| 29 | #define AVCODEC_HPELDSP_H |
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| 30 | |||
| 31 | #include |
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| 32 | #include |
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| 33 | |||
| 34 | /* add and put pixel (decoding) */ |
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| 35 | // blocksizes for hpel_pixels_func are 8x4,8x8 16x8 16x16 |
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| 36 | // h for hpel_pixels_func is limited to {width/2, width} but never larger |
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| 37 | // than 16 and never smaller than 4 |
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| 38 | typedef void (*op_pixels_func)(uint8_t *block /*align width (8 or 16)*/, |
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| 39 | const uint8_t *pixels /*align 1*/, |
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| 40 | ptrdiff_t line_size, int h); |
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| 41 | |||
| 42 | /** |
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| 43 | * Half-pel DSP context. |
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| 44 | */ |
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| 45 | typedef struct HpelDSPContext { |
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| 46 | /** |
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| 47 | * Halfpel motion compensation with rounding (a+b+1)>>1. |
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| 48 | * this is an array[4][4] of motion compensation functions for 4 |
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| 49 | * horizontal blocksizes (8,16) and the 4 halfpel positions |
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| 50 | * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ] |
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| 51 | * @param block destination where the result is stored |
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| 52 | * @param pixels source |
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| 53 | * @param line_size number of bytes in a horizontal line of block |
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| 54 | * @param h height |
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| 55 | */ |
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| 56 | op_pixels_func put_pixels_tab[4][4]; |
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| 57 | |||
| 58 | /** |
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| 59 | * Halfpel motion compensation with rounding (a+b+1)>>1. |
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| 60 | * This is an array[4][4] of motion compensation functions for 4 |
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| 61 | * horizontal blocksizes (8,16) and the 4 halfpel positions |
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| 62 | * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ] |
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| 63 | * @param block destination into which the result is averaged (a+b+1)>>1 |
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| 64 | * @param pixels source |
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| 65 | * @param line_size number of bytes in a horizontal line of block |
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| 66 | * @param h height |
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| 67 | */ |
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| 68 | op_pixels_func avg_pixels_tab[4][4]; |
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| 69 | |||
| 70 | /** |
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| 71 | * Halfpel motion compensation with no rounding (a+b)>>1. |
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| 72 | * this is an array[4][4] of motion compensation functions for 2 |
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| 73 | * horizontal blocksizes (8,16) and the 4 halfpel positions |
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| 74 | * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ] |
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| 75 | * @param block destination where the result is stored |
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| 76 | * @param pixels source |
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| 77 | * @param line_size number of bytes in a horizontal line of block |
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| 78 | * @param h height |
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| 79 | */ |
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| 80 | op_pixels_func put_no_rnd_pixels_tab[4][4]; |
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| 81 | |||
| 82 | /** |
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| 83 | * Halfpel motion compensation with no rounding (a+b)>>1. |
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| 84 | * this is an array[4] of motion compensation functions for 1 |
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| 85 | * horizontal blocksize (16) and the 4 halfpel positions |
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| 86 | * *pixels_tab[0][ xhalfpel + 2*yhalfpel ] |
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| 87 | * @param block destination into which the result is averaged (a+b)>>1 |
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| 88 | * @param pixels source |
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| 89 | * @param line_size number of bytes in a horizontal line of block |
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| 90 | * @param h height |
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| 91 | */ |
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| 92 | op_pixels_func avg_no_rnd_pixels_tab[4]; |
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| 93 | } HpelDSPContext; |
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| 94 | |||
| 95 | void ff_hpeldsp_init(HpelDSPContext *c, int flags); |
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| 96 | |||
| 97 | void ff_hpeldsp_init_alpha(HpelDSPContext *c, int flags); |
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| 98 | void ff_hpeldsp_init_arm(HpelDSPContext *c, int flags); |
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| 99 | void ff_hpeldsp_init_bfin(HpelDSPContext *c, int flags); |
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| 100 | void ff_hpeldsp_init_ppc(HpelDSPContext *c, int flags); |
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| 101 | void ff_hpeldsp_init_vis(HpelDSPContext *c, int flags); |
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| 102 | void ff_hpeldsp_init_x86(HpelDSPContext *c, int flags); |
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| 103 | |||
| 104 | #endif /* AVCODEC_HPELDSP_H */ |