828 lines
25 KiB
C
828 lines
25 KiB
C
/*
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* High quality image resampling with polyphase filters
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* Copyright (c) 2001 Fabrice Bellard.
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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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/**
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* @file imgresample.c
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* High quality image resampling with polyphase filters .
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*/
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#include "avcodec.h"
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#include "swscale.h"
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#include "dsputil.h"
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#ifdef HAVE_ALTIVEC
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#include "ppc/imgresample_altivec.h"
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#endif
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#define NB_COMPONENTS 3
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#define PHASE_BITS 4
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#define NB_PHASES (1 << PHASE_BITS)
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#define NB_TAPS 4
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#define FCENTER 1 /* index of the center of the filter */
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//#define TEST 1 /* Test it */
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#define POS_FRAC_BITS 16
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#define POS_FRAC (1 << POS_FRAC_BITS)
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/* 6 bits precision is needed for MMX */
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#define FILTER_BITS 8
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#define LINE_BUF_HEIGHT (NB_TAPS * 4)
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struct SwsContext {
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AVClass *av_class;
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struct ImgReSampleContext *resampling_ctx;
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enum PixelFormat src_pix_fmt, dst_pix_fmt;
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};
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struct ImgReSampleContext {
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int iwidth, iheight, owidth, oheight;
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int topBand, bottomBand, leftBand, rightBand;
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int padtop, padbottom, padleft, padright;
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int pad_owidth, pad_oheight;
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int h_incr, v_incr;
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DECLARE_ALIGNED_8(int16_t, h_filters[NB_PHASES][NB_TAPS]); /* horizontal filters */
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DECLARE_ALIGNED_8(int16_t, v_filters[NB_PHASES][NB_TAPS]); /* vertical filters */
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uint8_t *line_buf;
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};
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void av_build_filter(int16_t *filter, double factor, int tap_count, int phase_count, int scale, int type);
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static inline int get_phase(int pos)
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{
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return ((pos) >> (POS_FRAC_BITS - PHASE_BITS)) & ((1 << PHASE_BITS) - 1);
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}
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/* This function must be optimized */
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static void h_resample_fast(uint8_t *dst, int dst_width, const uint8_t *src,
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int src_width, int src_start, int src_incr,
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int16_t *filters)
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{
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int src_pos, phase, sum, i;
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const uint8_t *s;
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int16_t *filter;
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src_pos = src_start;
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for(i=0;i<dst_width;i++) {
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#ifdef TEST
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/* test */
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if ((src_pos >> POS_FRAC_BITS) < 0 ||
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(src_pos >> POS_FRAC_BITS) > (src_width - NB_TAPS))
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av_abort();
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#endif
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s = src + (src_pos >> POS_FRAC_BITS);
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phase = get_phase(src_pos);
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filter = filters + phase * NB_TAPS;
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#if NB_TAPS == 4
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sum = s[0] * filter[0] +
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s[1] * filter[1] +
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s[2] * filter[2] +
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s[3] * filter[3];
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#else
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{
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int j;
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sum = 0;
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for(j=0;j<NB_TAPS;j++)
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sum += s[j] * filter[j];
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}
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#endif
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sum = sum >> FILTER_BITS;
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if (sum < 0)
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sum = 0;
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else if (sum > 255)
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sum = 255;
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dst[0] = sum;
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src_pos += src_incr;
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dst++;
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}
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}
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/* This function must be optimized */
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static void v_resample(uint8_t *dst, int dst_width, const uint8_t *src,
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int wrap, int16_t *filter)
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{
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int sum, i;
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const uint8_t *s;
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s = src;
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for(i=0;i<dst_width;i++) {
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#if NB_TAPS == 4
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sum = s[0 * wrap] * filter[0] +
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s[1 * wrap] * filter[1] +
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s[2 * wrap] * filter[2] +
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s[3 * wrap] * filter[3];
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#else
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{
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int j;
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uint8_t *s1 = s;
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sum = 0;
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for(j=0;j<NB_TAPS;j++) {
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sum += s1[0] * filter[j];
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s1 += wrap;
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}
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}
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#endif
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sum = sum >> FILTER_BITS;
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if (sum < 0)
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sum = 0;
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else if (sum > 255)
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sum = 255;
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dst[0] = sum;
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dst++;
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s++;
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}
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}
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#ifdef HAVE_MMX
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#include "i386/mmx.h"
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#define FILTER4(reg) \
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{\
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s = src + (src_pos >> POS_FRAC_BITS);\
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phase = get_phase(src_pos);\
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filter = filters + phase * NB_TAPS;\
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movq_m2r(*s, reg);\
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punpcklbw_r2r(mm7, reg);\
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movq_m2r(*filter, mm6);\
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pmaddwd_r2r(reg, mm6);\
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movq_r2r(mm6, reg);\
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psrlq_i2r(32, reg);\
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paddd_r2r(mm6, reg);\
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psrad_i2r(FILTER_BITS, reg);\
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src_pos += src_incr;\
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}
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#define DUMP(reg) movq_r2m(reg, tmp); printf(#reg "=%016"PRIx64"\n", tmp.uq);
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/* XXX: do four pixels at a time */
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static void h_resample_fast4_mmx(uint8_t *dst, int dst_width,
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const uint8_t *src, int src_width,
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int src_start, int src_incr, int16_t *filters)
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{
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int src_pos, phase;
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const uint8_t *s;
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int16_t *filter;
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mmx_t tmp;
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src_pos = src_start;
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pxor_r2r(mm7, mm7);
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while (dst_width >= 4) {
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FILTER4(mm0);
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FILTER4(mm1);
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FILTER4(mm2);
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FILTER4(mm3);
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packuswb_r2r(mm7, mm0);
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packuswb_r2r(mm7, mm1);
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packuswb_r2r(mm7, mm3);
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packuswb_r2r(mm7, mm2);
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movq_r2m(mm0, tmp);
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dst[0] = tmp.ub[0];
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movq_r2m(mm1, tmp);
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dst[1] = tmp.ub[0];
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movq_r2m(mm2, tmp);
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dst[2] = tmp.ub[0];
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movq_r2m(mm3, tmp);
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dst[3] = tmp.ub[0];
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dst += 4;
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dst_width -= 4;
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}
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while (dst_width > 0) {
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FILTER4(mm0);
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packuswb_r2r(mm7, mm0);
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movq_r2m(mm0, tmp);
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dst[0] = tmp.ub[0];
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dst++;
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dst_width--;
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}
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emms();
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}
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static void v_resample4_mmx(uint8_t *dst, int dst_width, const uint8_t *src,
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int wrap, int16_t *filter)
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{
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int sum, i, v;
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const uint8_t *s;
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mmx_t tmp;
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mmx_t coefs[4];
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for(i=0;i<4;i++) {
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v = filter[i];
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coefs[i].uw[0] = v;
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coefs[i].uw[1] = v;
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coefs[i].uw[2] = v;
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coefs[i].uw[3] = v;
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}
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pxor_r2r(mm7, mm7);
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s = src;
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while (dst_width >= 4) {
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movq_m2r(s[0 * wrap], mm0);
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punpcklbw_r2r(mm7, mm0);
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movq_m2r(s[1 * wrap], mm1);
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punpcklbw_r2r(mm7, mm1);
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movq_m2r(s[2 * wrap], mm2);
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punpcklbw_r2r(mm7, mm2);
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movq_m2r(s[3 * wrap], mm3);
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punpcklbw_r2r(mm7, mm3);
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pmullw_m2r(coefs[0], mm0);
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pmullw_m2r(coefs[1], mm1);
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pmullw_m2r(coefs[2], mm2);
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pmullw_m2r(coefs[3], mm3);
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paddw_r2r(mm1, mm0);
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paddw_r2r(mm3, mm2);
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paddw_r2r(mm2, mm0);
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psraw_i2r(FILTER_BITS, mm0);
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packuswb_r2r(mm7, mm0);
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movq_r2m(mm0, tmp);
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*(uint32_t *)dst = tmp.ud[0];
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dst += 4;
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s += 4;
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dst_width -= 4;
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}
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while (dst_width > 0) {
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sum = s[0 * wrap] * filter[0] +
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s[1 * wrap] * filter[1] +
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s[2 * wrap] * filter[2] +
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s[3 * wrap] * filter[3];
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sum = sum >> FILTER_BITS;
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if (sum < 0)
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sum = 0;
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else if (sum > 255)
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sum = 255;
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dst[0] = sum;
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dst++;
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s++;
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dst_width--;
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}
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emms();
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}
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#endif /* HAVE_MMX */
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/* slow version to handle limit cases. Does not need optimisation */
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static void h_resample_slow(uint8_t *dst, int dst_width,
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const uint8_t *src, int src_width,
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int src_start, int src_incr, int16_t *filters)
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{
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int src_pos, phase, sum, j, v, i;
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const uint8_t *s, *src_end;
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int16_t *filter;
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src_end = src + src_width;
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src_pos = src_start;
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for(i=0;i<dst_width;i++) {
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s = src + (src_pos >> POS_FRAC_BITS);
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phase = get_phase(src_pos);
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filter = filters + phase * NB_TAPS;
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sum = 0;
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for(j=0;j<NB_TAPS;j++) {
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if (s < src)
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v = src[0];
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else if (s >= src_end)
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v = src_end[-1];
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else
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v = s[0];
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sum += v * filter[j];
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s++;
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}
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sum = sum >> FILTER_BITS;
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if (sum < 0)
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sum = 0;
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else if (sum > 255)
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sum = 255;
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dst[0] = sum;
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src_pos += src_incr;
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dst++;
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}
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}
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static void h_resample(uint8_t *dst, int dst_width, const uint8_t *src,
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int src_width, int src_start, int src_incr,
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int16_t *filters)
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{
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int n, src_end;
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if (src_start < 0) {
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n = (0 - src_start + src_incr - 1) / src_incr;
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h_resample_slow(dst, n, src, src_width, src_start, src_incr, filters);
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dst += n;
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dst_width -= n;
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src_start += n * src_incr;
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}
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src_end = src_start + dst_width * src_incr;
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if (src_end > ((src_width - NB_TAPS) << POS_FRAC_BITS)) {
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n = (((src_width - NB_TAPS + 1) << POS_FRAC_BITS) - 1 - src_start) /
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src_incr;
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} else {
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n = dst_width;
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}
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#ifdef HAVE_MMX
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if ((mm_flags & MM_MMX) && NB_TAPS == 4)
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h_resample_fast4_mmx(dst, n,
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src, src_width, src_start, src_incr, filters);
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else
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#endif
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h_resample_fast(dst, n,
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src, src_width, src_start, src_incr, filters);
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if (n < dst_width) {
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dst += n;
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dst_width -= n;
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src_start += n * src_incr;
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h_resample_slow(dst, dst_width,
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src, src_width, src_start, src_incr, filters);
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}
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}
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static void component_resample(ImgReSampleContext *s,
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uint8_t *output, int owrap, int owidth, int oheight,
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uint8_t *input, int iwrap, int iwidth, int iheight)
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{
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int src_y, src_y1, last_src_y, ring_y, phase_y, y1, y;
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uint8_t *new_line, *src_line;
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last_src_y = - FCENTER - 1;
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/* position of the bottom of the filter in the source image */
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src_y = (last_src_y + NB_TAPS) * POS_FRAC;
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ring_y = NB_TAPS; /* position in ring buffer */
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for(y=0;y<oheight;y++) {
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/* apply horizontal filter on new lines from input if needed */
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src_y1 = src_y >> POS_FRAC_BITS;
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while (last_src_y < src_y1) {
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if (++ring_y >= LINE_BUF_HEIGHT + NB_TAPS)
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ring_y = NB_TAPS;
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last_src_y++;
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/* handle limit conditions : replicate line (slightly
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inefficient because we filter multiple times) */
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y1 = last_src_y;
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if (y1 < 0) {
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y1 = 0;
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} else if (y1 >= iheight) {
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y1 = iheight - 1;
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}
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src_line = input + y1 * iwrap;
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new_line = s->line_buf + ring_y * owidth;
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/* apply filter and handle limit cases correctly */
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h_resample(new_line, owidth,
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src_line, iwidth, - FCENTER * POS_FRAC, s->h_incr,
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&s->h_filters[0][0]);
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/* handle ring buffer wraping */
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if (ring_y >= LINE_BUF_HEIGHT) {
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memcpy(s->line_buf + (ring_y - LINE_BUF_HEIGHT) * owidth,
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new_line, owidth);
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}
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}
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/* apply vertical filter */
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phase_y = get_phase(src_y);
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#ifdef HAVE_MMX
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/* desactivated MMX because loss of precision */
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if ((mm_flags & MM_MMX) && NB_TAPS == 4 && 0)
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v_resample4_mmx(output, owidth,
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s->line_buf + (ring_y - NB_TAPS + 1) * owidth, owidth,
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&s->v_filters[phase_y][0]);
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else
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#endif
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#ifdef HAVE_ALTIVEC
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if ((mm_flags & MM_ALTIVEC) && NB_TAPS == 4 && FILTER_BITS <= 6)
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v_resample16_altivec(output, owidth,
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s->line_buf + (ring_y - NB_TAPS + 1) * owidth, owidth,
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&s->v_filters[phase_y][0]);
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else
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#endif
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v_resample(output, owidth,
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s->line_buf + (ring_y - NB_TAPS + 1) * owidth, owidth,
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&s->v_filters[phase_y][0]);
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src_y += s->v_incr;
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output += owrap;
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}
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}
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ImgReSampleContext *img_resample_init(int owidth, int oheight,
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int iwidth, int iheight)
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{
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return img_resample_full_init(owidth, oheight, iwidth, iheight,
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0, 0, 0, 0, 0, 0, 0, 0);
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}
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ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
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int iwidth, int iheight,
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int topBand, int bottomBand,
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int leftBand, int rightBand,
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int padtop, int padbottom,
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int padleft, int padright)
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{
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ImgReSampleContext *s;
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if (!owidth || !oheight || !iwidth || !iheight)
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return NULL;
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s = av_mallocz(sizeof(ImgReSampleContext));
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if (!s)
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return NULL;
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if((unsigned)owidth >= UINT_MAX / (LINE_BUF_HEIGHT + NB_TAPS))
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return NULL;
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s->line_buf = av_mallocz(owidth * (LINE_BUF_HEIGHT + NB_TAPS));
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if (!s->line_buf)
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goto fail;
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s->owidth = owidth;
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s->oheight = oheight;
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s->iwidth = iwidth;
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s->iheight = iheight;
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s->topBand = topBand;
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s->bottomBand = bottomBand;
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s->leftBand = leftBand;
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s->rightBand = rightBand;
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s->padtop = padtop;
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s->padbottom = padbottom;
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s->padleft = padleft;
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s->padright = padright;
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s->pad_owidth = owidth - (padleft + padright);
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s->pad_oheight = oheight - (padtop + padbottom);
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s->h_incr = ((iwidth - leftBand - rightBand) * POS_FRAC) / s->pad_owidth;
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s->v_incr = ((iheight - topBand - bottomBand) * POS_FRAC) / s->pad_oheight;
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av_build_filter(&s->h_filters[0][0], (float) s->pad_owidth /
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(float) (iwidth - leftBand - rightBand), NB_TAPS, NB_PHASES, 1<<FILTER_BITS, 0);
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av_build_filter(&s->v_filters[0][0], (float) s->pad_oheight /
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(float) (iheight - topBand - bottomBand), NB_TAPS, NB_PHASES, 1<<FILTER_BITS, 0);
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return s;
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fail:
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av_free(s);
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return NULL;
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}
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|
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void img_resample(ImgReSampleContext *s,
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AVPicture *output, const AVPicture *input)
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{
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int i, shift;
|
|
uint8_t* optr;
|
|
|
|
for (i=0;i<3;i++) {
|
|
shift = (i == 0) ? 0 : 1;
|
|
|
|
optr = output->data[i] + (((output->linesize[i] *
|
|
s->padtop) + s->padleft) >> shift);
|
|
|
|
component_resample(s, optr, output->linesize[i],
|
|
s->pad_owidth >> shift, s->pad_oheight >> shift,
|
|
input->data[i] + (input->linesize[i] *
|
|
(s->topBand >> shift)) + (s->leftBand >> shift),
|
|
input->linesize[i], ((s->iwidth - s->leftBand -
|
|
s->rightBand) >> shift),
|
|
(s->iheight - s->topBand - s->bottomBand) >> shift);
|
|
}
|
|
}
|
|
|
|
void img_resample_close(ImgReSampleContext *s)
|
|
{
|
|
av_free(s->line_buf);
|
|
av_free(s);
|
|
}
|
|
|
|
struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat,
|
|
int dstW, int dstH, int dstFormat,
|
|
int flags, SwsFilter *srcFilter,
|
|
SwsFilter *dstFilter, double *param)
|
|
{
|
|
struct SwsContext *ctx;
|
|
|
|
ctx = av_malloc(sizeof(struct SwsContext));
|
|
if (ctx)
|
|
ctx->av_class = av_mallocz(sizeof(AVClass));
|
|
if (!ctx || !ctx->av_class) {
|
|
av_log(NULL, AV_LOG_ERROR, "Cannot allocate a resampling context!\n");
|
|
|
|
return NULL;
|
|
}
|
|
|
|
if ((srcH != dstH) || (srcW != dstW)) {
|
|
if ((srcFormat != PIX_FMT_YUV420P) || (dstFormat != PIX_FMT_YUV420P)) {
|
|
av_log(NULL, AV_LOG_INFO, "PIX_FMT_YUV420P will be used as an intermediate format for rescaling\n");
|
|
}
|
|
ctx->resampling_ctx = img_resample_init(dstW, dstH, srcW, srcH);
|
|
} else {
|
|
ctx->resampling_ctx = av_malloc(sizeof(ImgReSampleContext));
|
|
ctx->resampling_ctx->iheight = srcH;
|
|
ctx->resampling_ctx->iwidth = srcW;
|
|
ctx->resampling_ctx->oheight = dstH;
|
|
ctx->resampling_ctx->owidth = dstW;
|
|
}
|
|
ctx->src_pix_fmt = srcFormat;
|
|
ctx->dst_pix_fmt = dstFormat;
|
|
|
|
return ctx;
|
|
}
|
|
|
|
void sws_freeContext(struct SwsContext *ctx)
|
|
{
|
|
if (!ctx)
|
|
return;
|
|
if ((ctx->resampling_ctx->iwidth != ctx->resampling_ctx->owidth) ||
|
|
(ctx->resampling_ctx->iheight != ctx->resampling_ctx->oheight)) {
|
|
img_resample_close(ctx->resampling_ctx);
|
|
} else {
|
|
av_free(ctx->resampling_ctx);
|
|
}
|
|
av_free(ctx->av_class);
|
|
av_free(ctx);
|
|
}
|
|
|
|
|
|
/**
|
|
* Checks if context is valid or reallocs a new one instead.
|
|
* If context is NULL, just calls sws_getContext() to get a new one.
|
|
* Otherwise, checks if the parameters are the same already saved in context.
|
|
* If that is the case, returns the current context.
|
|
* Otherwise, frees context and gets a new one.
|
|
*
|
|
* Be warned that srcFilter, dstFilter are not checked, they are
|
|
* asumed to remain valid.
|
|
*/
|
|
struct SwsContext *sws_getCachedContext(struct SwsContext *ctx,
|
|
int srcW, int srcH, int srcFormat,
|
|
int dstW, int dstH, int dstFormat, int flags,
|
|
SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)
|
|
{
|
|
if (ctx != NULL) {
|
|
if ((ctx->resampling_ctx->iwidth != srcW) ||
|
|
(ctx->resampling_ctx->iheight != srcH) ||
|
|
(ctx->src_pix_fmt != srcFormat) ||
|
|
(ctx->resampling_ctx->owidth != dstW) ||
|
|
(ctx->resampling_ctx->oheight != dstH) ||
|
|
(ctx->dst_pix_fmt != dstFormat))
|
|
{
|
|
sws_freeContext(ctx);
|
|
ctx = NULL;
|
|
}
|
|
}
|
|
if (ctx == NULL) {
|
|
return sws_getContext(srcW, srcH, srcFormat,
|
|
dstW, dstH, dstFormat, flags,
|
|
srcFilter, dstFilter, param);
|
|
}
|
|
return ctx;
|
|
}
|
|
|
|
int sws_scale(struct SwsContext *ctx, uint8_t* src[], int srcStride[],
|
|
int srcSliceY, int srcSliceH, uint8_t* dst[], int dstStride[])
|
|
{
|
|
AVPicture src_pict, dst_pict;
|
|
int i, res = 0;
|
|
AVPicture picture_format_temp;
|
|
AVPicture picture_resample_temp, *formatted_picture, *resampled_picture;
|
|
uint8_t *buf1 = NULL, *buf2 = NULL;
|
|
enum PixelFormat current_pix_fmt;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
src_pict.data[i] = src[i];
|
|
src_pict.linesize[i] = srcStride[i];
|
|
dst_pict.data[i] = dst[i];
|
|
dst_pict.linesize[i] = dstStride[i];
|
|
}
|
|
if ((ctx->resampling_ctx->iwidth != ctx->resampling_ctx->owidth) ||
|
|
(ctx->resampling_ctx->iheight != ctx->resampling_ctx->oheight)) {
|
|
/* We have to rescale the picture, but only YUV420P rescaling is supported... */
|
|
|
|
if (ctx->src_pix_fmt != PIX_FMT_YUV420P) {
|
|
int size;
|
|
|
|
/* create temporary picture for rescaling input*/
|
|
size = avpicture_get_size(PIX_FMT_YUV420P, ctx->resampling_ctx->iwidth, ctx->resampling_ctx->iheight);
|
|
buf1 = av_malloc(size);
|
|
if (!buf1) {
|
|
res = -1;
|
|
goto the_end;
|
|
}
|
|
formatted_picture = &picture_format_temp;
|
|
avpicture_fill((AVPicture*)formatted_picture, buf1,
|
|
PIX_FMT_YUV420P, ctx->resampling_ctx->iwidth, ctx->resampling_ctx->iheight);
|
|
|
|
if (img_convert((AVPicture*)formatted_picture, PIX_FMT_YUV420P,
|
|
&src_pict, ctx->src_pix_fmt,
|
|
ctx->resampling_ctx->iwidth, ctx->resampling_ctx->iheight) < 0) {
|
|
|
|
av_log(NULL, AV_LOG_ERROR, "pixel format conversion not handled\n");
|
|
res = -1;
|
|
goto the_end;
|
|
}
|
|
} else {
|
|
formatted_picture = &src_pict;
|
|
}
|
|
|
|
if (ctx->dst_pix_fmt != PIX_FMT_YUV420P) {
|
|
int size;
|
|
|
|
/* create temporary picture for rescaling output*/
|
|
size = avpicture_get_size(PIX_FMT_YUV420P, ctx->resampling_ctx->owidth, ctx->resampling_ctx->oheight);
|
|
buf2 = av_malloc(size);
|
|
if (!buf2) {
|
|
res = -1;
|
|
goto the_end;
|
|
}
|
|
resampled_picture = &picture_resample_temp;
|
|
avpicture_fill((AVPicture*)resampled_picture, buf2,
|
|
PIX_FMT_YUV420P, ctx->resampling_ctx->owidth, ctx->resampling_ctx->oheight);
|
|
|
|
} else {
|
|
resampled_picture = &dst_pict;
|
|
}
|
|
|
|
/* ...and finally rescale!!! */
|
|
img_resample(ctx->resampling_ctx, resampled_picture, formatted_picture);
|
|
current_pix_fmt = PIX_FMT_YUV420P;
|
|
} else {
|
|
resampled_picture = &src_pict;
|
|
current_pix_fmt = ctx->src_pix_fmt;
|
|
}
|
|
|
|
if (current_pix_fmt != ctx->dst_pix_fmt) {
|
|
if (img_convert(&dst_pict, ctx->dst_pix_fmt,
|
|
resampled_picture, current_pix_fmt,
|
|
ctx->resampling_ctx->owidth, ctx->resampling_ctx->oheight) < 0) {
|
|
|
|
av_log(NULL, AV_LOG_ERROR, "pixel format conversion not handled\n");
|
|
|
|
res = -1;
|
|
goto the_end;
|
|
}
|
|
} else if (resampled_picture != &dst_pict) {
|
|
av_picture_copy(&dst_pict, resampled_picture, current_pix_fmt,
|
|
ctx->resampling_ctx->owidth, ctx->resampling_ctx->oheight);
|
|
}
|
|
|
|
the_end:
|
|
av_free(buf1);
|
|
av_free(buf2);
|
|
return res;
|
|
}
|
|
|
|
|
|
#ifdef TEST
|
|
#include <stdio.h>
|
|
#undef exit
|
|
|
|
/* input */
|
|
#define XSIZE 256
|
|
#define YSIZE 256
|
|
uint8_t img[XSIZE * YSIZE];
|
|
|
|
/* output */
|
|
#define XSIZE1 512
|
|
#define YSIZE1 512
|
|
uint8_t img1[XSIZE1 * YSIZE1];
|
|
uint8_t img2[XSIZE1 * YSIZE1];
|
|
|
|
void save_pgm(const char *filename, uint8_t *img, int xsize, int ysize)
|
|
{
|
|
#undef fprintf
|
|
FILE *f;
|
|
f=fopen(filename,"w");
|
|
fprintf(f,"P5\n%d %d\n%d\n", xsize, ysize, 255);
|
|
fwrite(img,1, xsize * ysize,f);
|
|
fclose(f);
|
|
#define fprintf please_use_av_log
|
|
}
|
|
|
|
static void dump_filter(int16_t *filter)
|
|
{
|
|
int i, ph;
|
|
|
|
for(ph=0;ph<NB_PHASES;ph++) {
|
|
av_log(NULL, AV_LOG_INFO, "%2d: ", ph);
|
|
for(i=0;i<NB_TAPS;i++) {
|
|
av_log(NULL, AV_LOG_INFO, " %5.2f", filter[ph * NB_TAPS + i] / 256.0);
|
|
}
|
|
av_log(NULL, AV_LOG_INFO, "\n");
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_MMX
|
|
int mm_flags;
|
|
#endif
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int x, y, v, i, xsize, ysize;
|
|
ImgReSampleContext *s;
|
|
float fact, factors[] = { 1/2.0, 3.0/4.0, 1.0, 4.0/3.0, 16.0/9.0, 2.0 };
|
|
char buf[256];
|
|
|
|
/* build test image */
|
|
for(y=0;y<YSIZE;y++) {
|
|
for(x=0;x<XSIZE;x++) {
|
|
if (x < XSIZE/2 && y < YSIZE/2) {
|
|
if (x < XSIZE/4 && y < YSIZE/4) {
|
|
if ((x % 10) <= 6 &&
|
|
(y % 10) <= 6)
|
|
v = 0xff;
|
|
else
|
|
v = 0x00;
|
|
} else if (x < XSIZE/4) {
|
|
if (x & 1)
|
|
v = 0xff;
|
|
else
|
|
v = 0;
|
|
} else if (y < XSIZE/4) {
|
|
if (y & 1)
|
|
v = 0xff;
|
|
else
|
|
v = 0;
|
|
} else {
|
|
if (y < YSIZE*3/8) {
|
|
if ((y+x) & 1)
|
|
v = 0xff;
|
|
else
|
|
v = 0;
|
|
} else {
|
|
if (((x+3) % 4) <= 1 &&
|
|
((y+3) % 4) <= 1)
|
|
v = 0xff;
|
|
else
|
|
v = 0x00;
|
|
}
|
|
}
|
|
} else if (x < XSIZE/2) {
|
|
v = ((x - (XSIZE/2)) * 255) / (XSIZE/2);
|
|
} else if (y < XSIZE/2) {
|
|
v = ((y - (XSIZE/2)) * 255) / (XSIZE/2);
|
|
} else {
|
|
v = ((x + y - XSIZE) * 255) / XSIZE;
|
|
}
|
|
img[(YSIZE - y) * XSIZE + (XSIZE - x)] = v;
|
|
}
|
|
}
|
|
save_pgm("/tmp/in.pgm", img, XSIZE, YSIZE);
|
|
for(i=0;i<sizeof(factors)/sizeof(float);i++) {
|
|
fact = factors[i];
|
|
xsize = (int)(XSIZE * fact);
|
|
ysize = (int)((YSIZE - 100) * fact);
|
|
s = img_resample_full_init(xsize, ysize, XSIZE, YSIZE, 50 ,50, 0, 0, 0, 0, 0, 0);
|
|
av_log(NULL, AV_LOG_INFO, "Factor=%0.2f\n", fact);
|
|
dump_filter(&s->h_filters[0][0]);
|
|
component_resample(s, img1, xsize, xsize, ysize,
|
|
img + 50 * XSIZE, XSIZE, XSIZE, YSIZE - 100);
|
|
img_resample_close(s);
|
|
|
|
snprintf(buf, sizeof(buf), "/tmp/out%d.pgm", i);
|
|
save_pgm(buf, img1, xsize, ysize);
|
|
}
|
|
|
|
/* mmx test */
|
|
#ifdef HAVE_MMX
|
|
av_log(NULL, AV_LOG_INFO, "MMX test\n");
|
|
fact = 0.72;
|
|
xsize = (int)(XSIZE * fact);
|
|
ysize = (int)(YSIZE * fact);
|
|
mm_flags = MM_MMX;
|
|
s = img_resample_init(xsize, ysize, XSIZE, YSIZE);
|
|
component_resample(s, img1, xsize, xsize, ysize,
|
|
img, XSIZE, XSIZE, YSIZE);
|
|
|
|
mm_flags = 0;
|
|
s = img_resample_init(xsize, ysize, XSIZE, YSIZE);
|
|
component_resample(s, img2, xsize, xsize, ysize,
|
|
img, XSIZE, XSIZE, YSIZE);
|
|
if (memcmp(img1, img2, xsize * ysize) != 0) {
|
|
av_log(NULL, AV_LOG_ERROR, "mmx error\n");
|
|
exit(1);
|
|
}
|
|
av_log(NULL, AV_LOG_INFO, "MMX OK\n");
|
|
#endif /* HAVE_MMX */
|
|
return 0;
|
|
}
|
|
|
|
#endif /* TEST */
|