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68 lines
2.2 KiB
68 lines
2.2 KiB
/* |
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* Format Conversion Utils |
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* Copyright (c) 2000, 2001 Fabrice Bellard |
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avcodec.h" |
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#include "fmtconvert.h" |
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static void int32_to_float_fmul_scalar_c(float *dst, const int *src, float mul, int len){ |
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int i; |
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for(i=0; i<len; i++) |
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dst[i] = src[i] * mul; |
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} |
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static av_always_inline int float_to_int16_one(const float *src){ |
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return av_clip_int16(lrintf(*src)); |
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} |
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static void float_to_int16_c(int16_t *dst, const float *src, long len) |
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{ |
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int i; |
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for(i=0; i<len; i++) |
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dst[i] = float_to_int16_one(src+i); |
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} |
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static void float_to_int16_interleave_c(int16_t *dst, const float **src, |
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long len, int channels) |
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{ |
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int i,j,c; |
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if(channels==2){ |
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for(i=0; i<len; i++){ |
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dst[2*i] = float_to_int16_one(src[0]+i); |
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dst[2*i+1] = float_to_int16_one(src[1]+i); |
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} |
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}else{ |
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for(c=0; c<channels; c++) |
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for(i=0, j=c; i<len; i++, j+=channels) |
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dst[j] = float_to_int16_one(src[c]+i); |
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} |
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} |
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av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx) |
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{ |
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c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_c; |
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c->float_to_int16 = float_to_int16_c; |
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c->float_to_int16_interleave = float_to_int16_interleave_c; |
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if (ARCH_ARM) ff_fmt_convert_init_arm(c, avctx); |
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if (HAVE_ALTIVEC) ff_fmt_convert_init_ppc(c, avctx); |
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if (HAVE_MMX) ff_fmt_convert_init_x86(c, avctx); |
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}
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