/* * 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 */