swscale-example: Use SWS_BILINEAR instead of hardcoded value.
[libav.git] / libswscale / swscale-example.c
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c9b99ea6 1/*
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2 * Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
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6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
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10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
d026b45e 15 *
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16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
b19bcbaa 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
d026b45e 19 */
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20
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <inttypes.h>
25#include <stdarg.h>
26
e9e12f0e 27#undef HAVE_AV_CONFIG_H
83da2c6f 28#include "libavutil/avutil.h"
9a034dde 29#include "libavutil/lfg.h"
c9b99ea6 30#include "swscale.h"
c9b99ea6 31
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32/* HACK Duplicated from swscale_internal.h.
33 * Should be removed when a cleaner pixel format system exists. */
34const char *sws_format_name(enum PixelFormat format);
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35#define isGray(x) ( \
36 (x)==PIX_FMT_GRAY8 \
37 || (x)==PIX_FMT_GRAY16BE \
38 || (x)==PIX_FMT_GRAY16LE \
39 )
a48ce2c3 40#define hasChroma(x) (!( \
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41 isGray(x) \
42 || (x)==PIX_FMT_MONOBLACK \
43 || (x)==PIX_FMT_MONOWHITE \
44 ))
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45#define isALPHA(x) ( \
46 (x)==PIX_FMT_BGR32 \
47 || (x)==PIX_FMT_BGR32_1 \
48 || (x)==PIX_FMT_RGB32 \
49 || (x)==PIX_FMT_RGB32_1 \
50 || (x)==PIX_FMT_YUVA420P \
51 )
dc822901 52
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53static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h)
54{
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55 int x,y;
56 uint64_t ssd=0;
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57
58//printf("%d %d\n", w, h);
6a4970ab 59
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60 for (y=0; y<h; y++) {
61 for (x=0; x<w; x++) {
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62 int d= src1[x + y*stride1] - src2[x + y*stride2];
63 ssd+= d*d;
c9b99ea6 64//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );
221b804f 65 }
c9b99ea6 66//printf("\n");
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67 }
68 return ssd;
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69}
70
71// test by ref -> src -> dst -> out & compare out against ref
72// ref & out are YV12
110f147a 73static int doTest(uint8_t *ref[4], int refStride[4], int w, int h, int srcFormat, int dstFormat,
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74 int srcW, int srcH, int dstW, int dstH, int flags)
75{
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76 uint8_t *src[4] = {0};
77 uint8_t *dst[4] = {0};
78 uint8_t *out[4] = {0};
110f147a 79 int srcStride[4], dstStride[4];
221b804f 80 int i;
f5a9c4ee 81 uint64_t ssdY, ssdU=0, ssdV=0, ssdA=0;
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82 struct SwsContext *srcContext = NULL, *dstContext = NULL,
83 *outContext = NULL;
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84 int res;
85
86 res = 0;
dd68318c 87 for (i=0; i<4; i++) {
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88 // avoid stride % bpp != 0
89 if (srcFormat==PIX_FMT_RGB24 || srcFormat==PIX_FMT_BGR24)
90 srcStride[i]= srcW*3;
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91 else if (srcFormat==PIX_FMT_RGB48BE || srcFormat==PIX_FMT_RGB48LE)
92 srcStride[i]= srcW*6;
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93 else
94 srcStride[i]= srcW*4;
95
96 if (dstFormat==PIX_FMT_RGB24 || dstFormat==PIX_FMT_BGR24)
97 dstStride[i]= dstW*3;
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98 else if (dstFormat==PIX_FMT_RGB48BE || dstFormat==PIX_FMT_RGB48LE)
99 dstStride[i]= dstW*6;
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100 else
101 dstStride[i]= dstW*4;
102
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103 src[i]= malloc(srcStride[i]*srcH);
104 dst[i]= malloc(dstStride[i]*dstH);
105 out[i]= malloc(refStride[i]*h);
1b0a4572 106 if (!src[i] || !dst[i] || !out[i]) {
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107 perror("Malloc");
108 res = -1;
109
110 goto end;
111 }
112 }
113
110f147a 114 srcContext= sws_getContext(w, h, PIX_FMT_YUVA420P, srcW, srcH, srcFormat, flags, NULL, NULL, NULL);
1b0a4572 115 if (!srcContext) {
221b804f 116 fprintf(stderr, "Failed to get %s ---> %s\n",
110f147a 117 sws_format_name(PIX_FMT_YUVA420P),
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118 sws_format_name(srcFormat));
119 res = -1;
120
121 goto end;
122 }
123 dstContext= sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, NULL, NULL, NULL);
1b0a4572 124 if (!dstContext) {
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125 fprintf(stderr, "Failed to get %s ---> %s\n",
126 sws_format_name(srcFormat),
127 sws_format_name(dstFormat));
128 res = -1;
129
130 goto end;
131 }
110f147a 132 outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUVA420P, flags, NULL, NULL, NULL);
1b0a4572 133 if (!outContext) {
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134 fprintf(stderr, "Failed to get %s ---> %s\n",
135 sws_format_name(dstFormat),
110f147a 136 sws_format_name(PIX_FMT_YUVA420P));
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137 res = -1;
138
139 goto end;
140 }
141// printf("test %X %X %X -> %X %X %X\n", (int)ref[0], (int)ref[1], (int)ref[2],
142// (int)src[0], (int)src[1], (int)src[2]);
143
144 sws_scale(srcContext, ref, refStride, 0, h , src, srcStride);
145 sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
146 sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
27161c06 147
221b804f 148 ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
d426ea20 149 if (hasChroma(srcFormat) && hasChroma(dstFormat)) {
f5a9c4ee 150 //FIXME check that output is really gray
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151 ssdU= getSSD(ref[1], out[1], refStride[1], refStride[1], (w+1)>>1, (h+1)>>1);
152 ssdV= getSSD(ref[2], out[2], refStride[2], refStride[2], (w+1)>>1, (h+1)>>1);
f5a9c4ee 153 }
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154 if (isALPHA(srcFormat) && isALPHA(dstFormat))
155 ssdA= getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);
6a4970ab 156
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157 ssdY/= w*h;
158 ssdU/= w*h/4;
159 ssdV/= w*h/4;
110f147a 160 ssdA/= w*h;
6a4970ab 161
4ed88643 162 printf(" %s %dx%d -> %s %4dx%4d flags=%2d SSD=%5"PRId64",%5"PRId64",%5"PRId64",%5"PRId64"\n",
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163 sws_format_name(srcFormat), srcW, srcH,
164 sws_format_name(dstFormat), dstW, dstH,
110f147a 165 flags, ssdY, ssdU, ssdV, ssdA);
ed2164f3 166 fflush(stdout);
c9b99ea6 167
a48ce2c3 168end:
6a4970ab 169
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170 sws_freeContext(srcContext);
171 sws_freeContext(dstContext);
172 sws_freeContext(outContext);
c9b99ea6 173
dd68318c 174 for (i=0; i<4; i++) {
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175 free(src[i]);
176 free(dst[i]);
177 free(out[i]);
178 }
c9b99ea6 179
221b804f 180 return res;
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181}
182
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183static void selfTest(uint8_t *src[4], int stride[4], int w, int h)
184{
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185 const int flags[] = { SWS_FAST_BILINEAR,
186 SWS_BILINEAR, SWS_BICUBIC,
187 SWS_X , SWS_POINT , SWS_AREA, 0 };
188 const int srcW = w;
189 const int srcH = h;
190 const int dstW[] = { srcW - srcW/3, srcW, srcW + srcW/3, 0 };
191 const int dstH[] = { srcH - srcH/3, srcH, srcH + srcH/3, 0 };
221b804f 192 enum PixelFormat srcFormat, dstFormat;
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193
194 for (srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {
195 for (dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {
6b052ba8 196 int i, j, k;
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197 int res = 0;
198
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199 printf("%s -> %s\n",
200 sws_format_name(srcFormat),
201 sws_format_name(dstFormat));
ae9e0e83 202 fflush(stdout);
221b804f 203
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204 for (i = 0; dstW[i] && !res; i++)
205 for (j = 0; dstH[j] && !res; j++)
206 for (k = 0; flags[k] && !res; k++)
221b804f 207 res = doTest(src, stride, w, h, srcFormat, dstFormat,
6b052ba8 208 srcW, srcH, dstW[i], dstH[j], flags[k]);
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209 }
210 }
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211}
212
213#define W 96
214#define H 96
215
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216int main(int argc, char **argv)
217{
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218 uint8_t *rgb_data = malloc (W*H*4);
219 uint8_t *rgb_src[3]= {rgb_data, NULL, NULL};
220 int rgb_stride[3]={4*W, 0, 0};
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221 uint8_t *data = malloc (4*W*H);
222 uint8_t *src[4]= {data, data+W*H, data+W*H*2, data+W*H*3};
223 int stride[4]={W, W, W, W};
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224 int x, y;
225 struct SwsContext *sws;
9a034dde 226 AVLFG rand;
221b804f 227
7da35acd 228 sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUVA420P, SWS_BILINEAR, NULL, NULL, NULL);
221b804f 229
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230 av_lfg_init(&rand, 1);
231
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232 for (y=0; y<H; y++) {
233 for (x=0; x<W*4; x++) {
9a034dde 234 rgb_data[ x + y*4*W]= av_lfg_get(&rand);
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235 }
236 }
e5091488 237 sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
64d39b7c 238 sws_freeContext(sws);
27161c06 239
e5091488 240 selfTest(src, stride, W, H);
516b1f82 241
d7cf0a6f 242 return 0;
c9b99ea6 243}