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/*
* Format Conversion Utils
* Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_FMTCONVERT_H
#define AVCODEC_FMTCONVERT_H
#include "avcodec.h"
typedef struct FmtConvertContext {
/**
* Convert an array of int32_t to float and multiply by a float value.
* @param dst destination array of float.
* constraints: 16-byte aligned
* @param src source array of int32_t.
* constraints: 16-byte aligned
* @param len number of elements to convert.
* constraints: multiple of 8
*/
void (*int32_to_float_fmul_scalar)(float *dst, const int32_t *src,
float mul, int len);
/**
* Convert an array of int32_t to float and multiply by a float value from another array,
* stepping along the float array once for each 8 integers.
* @param c pointer to FmtConvertContext.
* @param dst destination array of float.
* constraints: 16-byte aligned
* @param src source array of int32_t.
* constraints: 16-byte aligned
* @param mul source array of float multipliers.
* @param len number of elements to convert.
* constraints: multiple of 8
*/
void (*int32_to_float_fmul_array8)(struct FmtConvertContext *c,
float *dst, const int32_t *src,
const float *mul, int len);
/**
* Convert an array of float to an array of int16_t.
*
* Convert floats from in the range [-32768.0,32767.0] to ints
* without rescaling
*
* @param dst destination array of int16_t.
* constraints: 16-byte aligned
* @param src source array of float.
* constraints: 16-byte aligned
* @param len number of elements to convert.
* constraints: multiple of 8
*/
void (*float_to_int16)(int16_t *dst, const float *src, long len);
/**
* Convert multiple arrays of float to an interleaved array of int16_t.
*
* Convert floats from in the range [-32768.0,32767.0] to ints
* without rescaling
*
* @param dst destination array of interleaved int16_t.
* constraints: 16-byte aligned
* @param src source array of float arrays, one for each channel.
* constraints: 16-byte aligned
* @param len number of elements to convert.
* constraints: multiple of 8
* @param channels number of channels
*/
void (*float_to_int16_interleave)(int16_t *dst, const float **src,
long len, int channels);
/**
* Convert multiple arrays of float to an array of interleaved float.
*
* @param dst destination array of interleaved float.
* constraints: 16-byte aligned
* @param src source array of float arrays, one for each channel.
* constraints: 16-byte aligned
* @param len number of elements to convert.
* constraints: multiple of 8
* @param channels number of channels
*/
void (*float_interleave)(float *dst, const float **src, unsigned int len,
int channels);
} FmtConvertContext;
void ff_float_interleave_c(float *dst, const float **src, unsigned int len,
int channels);
void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx);
void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx);
void ff_fmt_convert_init_ppc(FmtConvertContext *c, AVCodecContext *avctx);
void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx);
#endif /* AVCODEC_FMTCONVERT_H */
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