| /* |
| * Format Conversion Utils |
| * Copyright (c) 2000, 2001 Fabrice Bellard |
| * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; 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 int *src, 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 an array of interleaved float to multiple arrays of float. |
| */ |
| 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_altivec(FmtConvertContext *c, AVCodecContext *avctx); |
| void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx); |
| |
| /* ffdshow custom code */ |
| void float_interleave(float *dst, const float **src, long len, int channels); |
| void float_interleave_noscale(float *dst, const float **src, long len, int channels); |
| |
| #endif /* AVCODEC_FMTCONVERT_H */ |