## ffmpeg / libavcodec / fmtconvert.h @ c73d99e6

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1 | c73d99e6 | Justin Ruggles | ```
/*
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2 | ```
* Format Conversion Utils
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3 | ```
* Copyright (c) 2000, 2001 Fabrice Bellard
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4 | ```
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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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 | ```
#ifndef AVCODEC_FMTCONVERT_H
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24 | ```
#define AVCODEC_FMTCONVERT_H
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25 | |||

26 | #include "avcodec.h" |
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27 | |||

28 | typedef struct FmtConvertContext { |
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29 | ```
/**
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30 | ```
* Convert an array of int32_t to float and multiply by a float value.
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31 | ```
* @param dst destination array of float.
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32 | ```
* constraints: 16-byte aligned
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33 | ```
* @param src source array of int32_t.
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34 | ```
* constraints: 16-byte aligned
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35 | ```
* @param len number of elements to convert.
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36 | ```
* constraints: multiple of 8
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37 | ```
*/
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38 | void (*int32_to_float_fmul_scalar)(float *dst, const int *src, float mul, int len); |
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39 | |||

40 | ```
/**
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41 | ```
* Convert an array of float to an array of int16_t.
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42 | ```
*
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43 | ```
* Convert floats from in the range [-32768.0,32767.0] to ints
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44 | ```
* without rescaling
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45 | ```
*
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46 | ```
* @param dst destination array of int16_t.
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47 | ```
* constraints: 16-byte aligned
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48 | ```
* @param src source array of float.
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49 | ```
* constraints: 16-byte aligned
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50 | ```
* @param len number of elements to convert.
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51 | ```
* constraints: multiple of 8
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52 | ```
*/
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53 | void (*float_to_int16)(int16_t *dst, const float *src, long len); |
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54 | |||

55 | ```
/**
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56 | ```
* Convert multiple arrays of float to an interleaved array of int16_t.
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57 | ```
*
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58 | ```
* Convert floats from in the range [-32768.0,32767.0] to ints
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59 | ```
* without rescaling
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60 | ```
*
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61 | ```
* @param dst destination array of interleaved int16_t.
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62 | ```
* constraints: 16-byte aligned
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63 | ```
* @param src source array of float arrays, one for each channel.
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64 | ```
* constraints: 16-byte aligned
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65 | ```
* @param len number of elements to convert.
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66 | ```
* constraints: multiple of 8
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67 | ```
* @param channels number of channels
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68 | ```
*/
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69 | void (*float_to_int16_interleave)(int16_t *dst, const float **src, |
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70 | long len, int channels); |
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71 | } FmtConvertContext; |
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72 | |||

73 | ```
void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx);
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74 | |||

75 | ```
void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx);
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76 | ```
void ff_fmt_convert_init_ppc(FmtConvertContext *c, AVCodecContext *avctx);
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77 | ```
void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx);
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78 | |||

79 | #endif /* AVCODEC_FMTCONVERT_H */ |