yading@10: /*
yading@10:  * Format Conversion Utils
yading@10:  * Copyright (c) 2000, 2001 Fabrice Bellard
yading@10:  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_FMTCONVERT_H
yading@10: #define AVCODEC_FMTCONVERT_H
yading@10: 
yading@10: #include "avcodec.h"
yading@10: 
yading@10: typedef struct FmtConvertContext {
yading@10:     /**
yading@10:      * Convert an array of int32_t to float and multiply by a float value.
yading@10:      * @param dst destination array of float.
yading@10:      *            constraints: 16-byte aligned
yading@10:      * @param src source array of int32_t.
yading@10:      *            constraints: 16-byte aligned
yading@10:      * @param len number of elements to convert.
yading@10:      *            constraints: multiple of 8
yading@10:      */
yading@10:     void (*int32_to_float_fmul_scalar)(float *dst, const int *src, float mul, int len);
yading@10: 
yading@10:     /**
yading@10:      * Convert an array of float to an array of int16_t.
yading@10:      *
yading@10:      * Convert floats from in the range [-32768.0,32767.0] to ints
yading@10:      * without rescaling
yading@10:      *
yading@10:      * @param dst destination array of int16_t.
yading@10:      *            constraints: 16-byte aligned
yading@10:      * @param src source array of float.
yading@10:      *            constraints: 16-byte aligned
yading@10:      * @param len number of elements to convert.
yading@10:      *            constraints: multiple of 8
yading@10:      */
yading@10:     void (*float_to_int16)(int16_t *dst, const float *src, long len);
yading@10: 
yading@10:     /**
yading@10:      * Convert multiple arrays of float to an interleaved array of int16_t.
yading@10:      *
yading@10:      * Convert floats from in the range [-32768.0,32767.0] to ints
yading@10:      * without rescaling
yading@10:      *
yading@10:      * @param dst destination array of interleaved int16_t.
yading@10:      *            constraints: 16-byte aligned
yading@10:      * @param src source array of float arrays, one for each channel.
yading@10:      *            constraints: 16-byte aligned
yading@10:      * @param len number of elements to convert.
yading@10:      *            constraints: multiple of 8
yading@10:      * @param channels number of channels
yading@10:      */
yading@10:     void (*float_to_int16_interleave)(int16_t *dst, const float **src,
yading@10:                                       long len, int channels);
yading@10: 
yading@10:     /**
yading@10:      * Convert multiple arrays of float to an array of interleaved float.
yading@10:      *
yading@10:      * @param dst destination array of interleaved float.
yading@10:      *            constraints: 16-byte aligned
yading@10:      * @param src source array of float arrays, one for each channel.
yading@10:      *            constraints: 16-byte aligned
yading@10:      * @param len number of elements to convert.
yading@10:      *            constraints: multiple of 8
yading@10:      * @param channels number of channels
yading@10:      */
yading@10:     void (*float_interleave)(float *dst, const float **src, unsigned int len,
yading@10:                              int channels);
yading@10: } FmtConvertContext;
yading@10: 
yading@10: void ff_float_interleave_c(float *dst, const float **src, unsigned int len,
yading@10:                            int channels);
yading@10: 
yading@10: void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx);
yading@10: 
yading@10: void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx);
yading@10: void ff_fmt_convert_init_altivec(FmtConvertContext *c, AVCodecContext *avctx);
yading@10: void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx);
yading@10: void ff_fmt_convert_init_mips(FmtConvertContext *c);
yading@10: 
yading@10: /* ffdshow custom code */
yading@10: void float_interleave(float *dst, const float **src, long len, int channels);
yading@10: void float_interleave_noscale(float *dst, const float **src, long len, int channels);
yading@10: 
yading@10: #endif /* AVCODEC_FMTCONVERT_H */