1/* 2 * DSP utils 3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard 4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23/** 24 * @file 25 * DSP utils. 26 * Note, many functions in here may use MMX which trashes the FPU state, it is 27 * absolutely necessary to call emms_c() between DSP & float/double code. 28 */ 29 30#ifndef AVCODEC_DSPUTIL_H 31#define AVCODEC_DSPUTIL_H 32 33#include "avcodec.h" 34 35extern uint32_t ff_square_tab[512]; 36 37 38/* minimum alignment rules ;) 39 * If you notice errors in the align stuff, need more alignment for some ASM code 40 * for some CPU or need to use a function with less aligned data then send a mail 41 * to the ffmpeg-devel mailing list, ... 42 * 43 * !warning These alignments might not match reality, (missing attribute((align)) 44 * stuff somewhere possible). 45 * I (Michael) did not check them, these are just the alignments which I think 46 * could be reached easily ... 47 * 48 * !future video codecs might need functions with less strict alignment 49 */ 50 51struct MpegEncContext; 52/* Motion estimation: 53 * h is limited to { width / 2, width, 2 * width }, 54 * but never larger than 16 and never smaller than 2. 55 * Although currently h < 4 is not used as functions with 56 * width < 8 are neither used nor implemented. */ 57typedef int (*me_cmp_func)(struct MpegEncContext *c, 58 uint8_t *blk1 /* align width (8 or 16) */, 59 uint8_t *blk2 /* align 1 */, int line_size, int h); 60 61/** 62 * DSPContext. 63 */ 64typedef struct DSPContext { 65 int (*sum_abs_dctelem)(int16_t *block /* align 16 */); 66 67 me_cmp_func sad[6]; /* identical to pix_absAxA except additional void * */ 68 me_cmp_func sse[6]; 69 me_cmp_func hadamard8_diff[6]; 70 me_cmp_func dct_sad[6]; 71 me_cmp_func quant_psnr[6]; 72 me_cmp_func bit[6]; 73 me_cmp_func rd[6]; 74 me_cmp_func vsad[6]; 75 me_cmp_func vsse[6]; 76 me_cmp_func nsse[6]; 77 me_cmp_func w53[6]; 78 me_cmp_func w97[6]; 79 me_cmp_func dct_max[6]; 80 me_cmp_func dct264_sad[6]; 81 82 me_cmp_func me_pre_cmp[6]; 83 me_cmp_func me_cmp[6]; 84 me_cmp_func me_sub_cmp[6]; 85 me_cmp_func mb_cmp[6]; 86 me_cmp_func ildct_cmp[6]; // only width 16 used 87 me_cmp_func frame_skip_cmp[6]; // only width 8 used 88 89 me_cmp_func pix_abs[2][4]; 90} DSPContext; 91 92void ff_dsputil_static_init(void); 93void ff_dsputil_init(DSPContext *p, AVCodecContext *avctx); 94void avpriv_dsputil_init(DSPContext* p, AVCodecContext *avctx); 95attribute_deprecated void dsputil_init(DSPContext* c, AVCodecContext *avctx); 96 97int ff_check_alignment(void); 98 99void ff_set_cmp(DSPContext *c, me_cmp_func *cmp, int type); 100 101void ff_dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx); 102void ff_dsputil_init_arm(DSPContext *c, AVCodecContext *avctx); 103void ff_dsputil_init_ppc(DSPContext *c, AVCodecContext *avctx); 104void ff_dsputil_init_x86(DSPContext *c, AVCodecContext *avctx); 105 106void ff_dsputil_init_dwt(DSPContext *c); 107 108#endif /* AVCODEC_DSPUTIL_H */ 109