ffmpeg / libavcodec / fmtconvert.h @ 0e09997f
History | View | Annotate | Download (3.17 KB)
| 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 int *src, float mul, int len); |
| 39 |
|
| 40 |
/**
|
| 41 |
* Convert an array of float to an array of int16_t.
|
| 42 |
*
|
| 43 |
* Convert floats from in the range [-32768.0,32767.0] to ints
|
| 44 |
* without rescaling
|
| 45 |
*
|
| 46 |
* @param dst destination array of int16_t.
|
| 47 |
* constraints: 16-byte aligned
|
| 48 |
* @param src source array of float.
|
| 49 |
* constraints: 16-byte aligned
|
| 50 |
* @param len number of elements to convert.
|
| 51 |
* constraints: multiple of 8
|
| 52 |
*/
|
| 53 |
void (*float_to_int16)(int16_t *dst, const float *src, long len); |
| 54 |
|
| 55 |
/**
|
| 56 |
* Convert multiple arrays of float to an interleaved array of int16_t.
|
| 57 |
*
|
| 58 |
* Convert floats from in the range [-32768.0,32767.0] to ints
|
| 59 |
* without rescaling
|
| 60 |
*
|
| 61 |
* @param dst destination array of interleaved int16_t.
|
| 62 |
* constraints: 16-byte aligned
|
| 63 |
* @param src source array of float arrays, one for each channel.
|
| 64 |
* constraints: 16-byte aligned
|
| 65 |
* @param len number of elements to convert.
|
| 66 |
* constraints: multiple of 8
|
| 67 |
* @param channels number of channels
|
| 68 |
*/
|
| 69 |
void (*float_to_int16_interleave)(int16_t *dst, const float **src, |
| 70 |
long len, int channels); |
| 71 |
} FmtConvertContext; |
| 72 |
|
| 73 |
void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx);
|
| 74 |
|
| 75 |
void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx);
|
| 76 |
void ff_fmt_convert_init_altivec(FmtConvertContext *c, AVCodecContext *avctx);
|
| 77 |
void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx);
|
| 78 |
|
| 79 |
/* ffdshow custom code */
|
| 80 |
void float_interleave(float *dst, const float **src, long len, int channels); |
| 81 |
void float_interleave_noscale(float *dst, const float **src, long len, int channels); |
| 82 |
|
| 83 |
#endif /* AVCODEC_FMTCONVERT_H */ |