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05aec7bb87
This moves the DWT functions from snow.c and dsputil.c to a file of their own. A new struct, DWTContext, holds the function pointers previously part of DSPContext. Originally committed as revision 22522 to svn://svn.ffmpeg.org/ffmpeg/trunk
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/*
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* Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net>
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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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#ifndef AVCODEC_SNOW_H
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#define AVCODEC_SNOW_H
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#include "dsputil.h"
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#include "dwt.h"
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#define MID_STATE 128
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#define MAX_PLANES 4
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#define QSHIFT 5
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#define QROOT (1<<QSHIFT)
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#define LOSSLESS_QLOG -128
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#define FRAC_BITS 4
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#define MAX_REF_FRAMES 8
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#define LOG2_OBMC_MAX 8
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#define OBMC_MAX (1<<(LOG2_OBMC_MAX))
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/* C bits used by mmx/sse2/altivec */
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static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){
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(*i) = (width) - 2;
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if (width & 1){
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low[(*i)+1] = low[((*i)+1)>>1];
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(*i)--;
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}
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}
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static av_always_inline void snow_interleave_line_footer(int * i, IDWTELEM * low, IDWTELEM * high){
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for (; (*i)>=0; (*i)-=2){
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low[(*i)+1] = high[(*i)>>1];
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low[*i] = low[(*i)>>1];
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}
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}
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static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){
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for(; i<w; i++){
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dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
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}
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if((width^lift_high)&1){
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dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
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}
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}
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static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){
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for(; i<w; i++){
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dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
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}
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if(width&1){
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dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
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}
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}
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#endif /* AVCODEC_SNOW_H */
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