libavcodec/fmtconvert.h

   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 <stdint.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     /**
  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 } FmtConvertContext;
  58
  59 void ff_fmt_convert_init(FmtConvertContext *c);
  60
  61 void ff_fmt_convert_init_aarch64(FmtConvertContext *c);
  62 void ff_fmt_convert_init_arm(FmtConvertContext *c);
  63 void ff_fmt_convert_init_ppc(FmtConvertContext *c);
  64 void ff_fmt_convert_init_riscv(FmtConvertContext *c);
  65 void ff_fmt_convert_init_x86(FmtConvertContext *c);
  66 void ff_fmt_convert_init_mips(FmtConvertContext *c);
  67
  68 #endif /* AVCODEC_FMTCONVERT_H */