1 /* 2 * Format Conversion Utils 3 * Copyright (c) 2000, 2001 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 #ifndef AVCODEC_FMTCONVERT_H 24 #define AVCODEC_FMTCONVERT_H 25 26 #include "avcodec.h" 27 28 typedef struct FmtConvertContext { 29 /** 30 * Convert an array of int32_t to float and multiply by a float value. 31 * @param dst destination array of float. 32 * constraints: 16-byte aligned 33 * @param src source array of int32_t. 34 * constraints: 16-byte aligned 35 * @param len number of elements to convert. 36 * constraints: multiple of 8 37 */ 38 void (*int32_to_float_fmul_scalar)(float *dst, const int32_t *src, 39 float mul, int len); 40 /** 41 * Convert an array of int32_t to float. 42 * @param dst destination array of float. 43 * constraints: 32-byte aligned 44 * @param src source array of int32_t. 45 * constraints: 32-byte aligned 46 * @param len number of elements to convert. 47 * constraints: multiple of 8 48 */ 49 void (*int32_to_float)(float *dst, const int32_t *src, intptr_t len); 50 51 /** 52 * Convert an array of int32_t to float and multiply by a float value from another array, 53 * stepping along the float array once for each 8 integers. 54 * @param c pointer to FmtConvertContext. 55 * @param dst destination array of float. 56 * constraints: 16-byte aligned 57 * @param src source array of int32_t. 58 * constraints: 16-byte aligned 59 * @param mul source array of float multipliers. 60 * @param len number of elements to convert. 61 * constraints: multiple of 8 62 */ 63 void (*int32_to_float_fmul_array8)(struct FmtConvertContext *c, 64 float *dst, const int32_t *src, 65 const float *mul, int len); 66 67 } FmtConvertContext; 68 69 void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx); 70 71 void ff_fmt_convert_init_aarch64(FmtConvertContext *c, AVCodecContext *avctx); 72 void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx); 73 void ff_fmt_convert_init_ppc(FmtConvertContext *c, AVCodecContext *avctx); 74 void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx); 75 void ff_fmt_convert_init_mips(FmtConvertContext *c); 76 77 #endif /* AVCODEC_FMTCONVERT_H */ 78