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 28typedef 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 /** 42 * Convert an array of int32_t to float and multiply by a float value from another array, 43 * stepping along the float array once for each 8 integers. 44 * @param c pointer to FmtConvertContext. 45 * @param dst destination array of float. 46 * constraints: 16-byte aligned 47 * @param src source array of int32_t. 48 * constraints: 16-byte aligned 49 * @param mul source array of float multipliers. 50 * @param len number of elements to convert. 51 * constraints: multiple of 8 52 */ 53 void (*int32_to_float_fmul_array8)(struct FmtConvertContext *c, 54 float *dst, const int32_t *src, 55 const float *mul, int len); 56 57 /** 58 * Convert an array of float to an array of int16_t. 59 * 60 * Convert floats from in the range [-32768.0,32767.0] to ints 61 * without rescaling 62 * 63 * @param dst destination array of int16_t. 64 * constraints: 16-byte aligned 65 * @param src source array of float. 66 * constraints: 16-byte aligned 67 * @param len number of elements to convert. 68 * constraints: multiple of 8 69 */ 70 void (*float_to_int16)(int16_t *dst, const float *src, long len); 71 72 /** 73 * Convert multiple arrays of float to an interleaved array of int16_t. 74 * 75 * Convert floats from in the range [-32768.0,32767.0] to ints 76 * without rescaling 77 * 78 * @param dst destination array of interleaved int16_t. 79 * constraints: 16-byte aligned 80 * @param src source array of float arrays, one for each channel. 81 * constraints: 16-byte aligned 82 * @param len number of elements to convert. 83 * constraints: multiple of 8 84 * @param channels number of channels 85 */ 86 void (*float_to_int16_interleave)(int16_t *dst, const float **src, 87 long len, int channels); 88 89 /** 90 * Convert multiple arrays of float to an array of interleaved float. 91 * 92 * @param dst destination array of interleaved float. 93 * constraints: 16-byte aligned 94 * @param src source array of float arrays, one for each channel. 95 * constraints: 16-byte aligned 96 * @param len number of elements to convert. 97 * constraints: multiple of 8 98 * @param channels number of channels 99 */ 100 void (*float_interleave)(float *dst, const float **src, unsigned int len, 101 int channels); 102} FmtConvertContext; 103 104void ff_float_interleave_c(float *dst, const float **src, unsigned int len, 105 int channels); 106 107void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx); 108 109void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx); 110void ff_fmt_convert_init_ppc(FmtConvertContext *c, AVCodecContext *avctx); 111void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx); 112void ff_fmt_convert_init_mips(FmtConvertContext *c); 113 114/* ffdshow custom code */ 115void float_interleave(float *dst, const float **src, long len, int channels); 116void float_interleave_noscale(float *dst, const float **src, long len, int channels); 117 118#endif /* AVCODEC_FMTCONVERT_H */ 119