/* * 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 */ #include "avcodec.h" #include "fmtconvert.h" #include "libavutil/common.h" static void int32_to_float_fmul_scalar_c(float *dst, const int *src, float mul, int len){ int i; for(i=0; i<len; i++) dst[i] = src[i] * mul; } static av_always_inline int float_to_int16_one(const float *src){ return av_clip_int16(lrintf(*src)); } static void float_to_int16_c(int16_t *dst, const float *src, long len) { int i; for(i=0; i<len; i++) dst[i] = float_to_int16_one(src+i); } static void float_to_int16_interleave_c(int16_t *dst, const float **src, long len, int channels) { int i,j,c; if(channels==2){ for(i=0; i<len; i++){ dst[2*i] = float_to_int16_one(src[0]+i); dst[2*i+1] = float_to_int16_one(src[1]+i); } }else{ for(c=0; c<channels; c++) for(i=0, j=c; i<len; i++, j+=channels) dst[j] = float_to_int16_one(src[c]+i); } } void ff_float_interleave_c(float *dst, const float **src, unsigned int len, int channels) { int j, c; unsigned int i; if (channels == 2) { for (i = 0; i < len; i++) { dst[2*i] = src[0][i]; dst[2*i+1] = src[1][i]; } } else if (channels == 1 && len < INT_MAX / sizeof(float)) { memcpy(dst, src[0], len * sizeof(float)); } else { for (c = 0; c < channels; c++) for (i = 0, j = c; i < len; i++, j += channels) dst[j] = src[c][i]; } } av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx) { c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_c; c->float_to_int16 = float_to_int16_c; c->float_to_int16_interleave = float_to_int16_interleave_c; c->float_interleave = ff_float_interleave_c; if (ARCH_ARM) ff_fmt_convert_init_arm(c, avctx); if (HAVE_ALTIVEC) ff_fmt_convert_init_altivec(c, avctx); if (HAVE_MMX) ff_fmt_convert_init_x86(c, avctx); if (HAVE_MIPSFPU) ff_fmt_convert_init_mips(c); } /* ffdshow custom code */ void float_interleave(float *dst, const float **src, long len, int channels) { int i,j,c; if(channels==2){ for(i=0; i<len; i++){ dst[2*i] = src[0][i] / 32768.0f; dst[2*i+1] = src[1][i] / 32768.0f; } }else{ for(c=0; c<channels; c++) for(i=0, j=c; i<len; i++, j+=channels) dst[j] = src[c][i] / 32768.0f; } } void float_interleave_noscale(float *dst, const float **src, long len, int channels) { int i,j,c; if(channels==2){ for(i=0; i<len; i++){ dst[2*i] = src[0][i]; dst[2*i+1] = src[1][i]; } }else{ for(c=0; c<channels; c++) for(i=0, j=c; i<len; i++, j+=channels) dst[j] = src[c][i]; } }