Change license headers to say 'FFmpeg' instead of 'this program/this library'
[libav.git] / libswscale / swscale-example.c
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1/*
2 Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
660204c6 16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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17*/
18
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22#include <inttypes.h>
23#include <stdarg.h>
24
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25#undef HAVE_AV_CONFIG_H
26#include "avutil.h"
c9b99ea6 27#include "swscale.h"
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28#include "swscale_internal.h"
29#include "rgb2rgb.h"
c9b99ea6 30
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31static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h){
32 int x,y;
33 uint64_t ssd=0;
34
35//printf("%d %d\n", w, h);
36
37 for(y=0; y<h; y++){
38 for(x=0; x<w; x++){
39 int d= src1[x + y*stride1] - src2[x + y*stride2];
40 ssd+= d*d;
41//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );
42 }
43//printf("\n");
44 }
45 return ssd;
46}
47
48// test by ref -> src -> dst -> out & compare out against ref
49// ref & out are YV12
87656472 50static int doTest(uint8_t *ref[3], int refStride[3], int w, int h, int srcFormat, int dstFormat,
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51 int srcW, int srcH, int dstW, int dstH, int flags){
52 uint8_t *src[3];
53 uint8_t *dst[3];
54 uint8_t *out[3];
55 int srcStride[3], dstStride[3];
56 int i;
57 uint64_t ssdY, ssdU, ssdV;
58 struct SwsContext *srcContext, *dstContext, *outContext;
87656472 59 int res;
c9b99ea6 60
87656472 61 res = 0;
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62 for(i=0; i<3; i++){
63 // avoid stride % bpp != 0
e9e12f0e 64 if(srcFormat==PIX_FMT_RGB24 || srcFormat==PIX_FMT_BGR24)
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65 srcStride[i]= srcW*3;
66 else
67 srcStride[i]= srcW*4;
68
e9e12f0e 69 if(dstFormat==PIX_FMT_RGB24 || dstFormat==PIX_FMT_BGR24)
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70 dstStride[i]= dstW*3;
71 else
72 dstStride[i]= dstW*4;
73
74 src[i]= (uint8_t*) malloc(srcStride[i]*srcH);
75 dst[i]= (uint8_t*) malloc(dstStride[i]*dstH);
76 out[i]= (uint8_t*) malloc(refStride[i]*h);
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77 if ((src[i] == NULL) || (dst[i] == NULL) || (out[i] == NULL)) {
78 perror("Malloc");
87656472 79 res = -1;
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80
81 goto end;
82 }
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83 }
84
87656472 85 dstContext = outContext = NULL;
e9e12f0e 86 srcContext= sws_getContext(w, h, PIX_FMT_YUV420P, srcW, srcH, srcFormat, flags, NULL, NULL, NULL);
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87 if (srcContext == NULL) {
88 fprintf(stderr, "Failed to get %s ---> %s\n",
89 sws_format_name(PIX_FMT_YUV420P),
90 sws_format_name(srcFormat));
91 res = -1;
92
93 goto end;
94 }
999bbe83 95 dstContext= sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, NULL, NULL, NULL);
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96 if (dstContext == NULL) {
97 fprintf(stderr, "Failed to get %s ---> %s\n",
98 sws_format_name(srcFormat),
99 sws_format_name(dstFormat));
100 res = -1;
101
102 goto end;
103 }
e9e12f0e 104 outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUV420P, flags, NULL, NULL, NULL);
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105 if (outContext == NULL) {
106 fprintf(stderr, "Failed to get %s ---> %s\n",
107 sws_format_name(dstFormat),
108 sws_format_name(PIX_FMT_YUV420P));
109 res = -1;
110
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111 goto end;
112 }
113// printf("test %X %X %X -> %X %X %X\n", (int)ref[0], (int)ref[1], (int)ref[2],
114// (int)src[0], (int)src[1], (int)src[2]);
115
116 sws_scale(srcContext, ref, refStride, 0, h , src, srcStride);
117 sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
118 sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
27161c06 119
6e1c66bc 120#if defined(ARCH_X86) || defined(ARCH_X86_64)
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121 asm volatile ("emms\n\t");
122#endif
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123
124 ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
125 ssdU= getSSD(ref[1], out[1], refStride[1], refStride[1], (w+1)>>1, (h+1)>>1);
126 ssdV= getSSD(ref[2], out[2], refStride[2], refStride[2], (w+1)>>1, (h+1)>>1);
127
e9e12f0e 128 if(srcFormat == PIX_FMT_GRAY8 || dstFormat==PIX_FMT_GRAY8) ssdU=ssdV=0; //FIXME check that output is really gray
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129
130 ssdY/= w*h;
131 ssdU/= w*h/4;
132 ssdV/= w*h/4;
133
134 if(ssdY>100 || ssdU>100 || ssdV>100){
135 printf(" %s %dx%d -> %s %4dx%4d flags=%2d SSD=%5lld,%5lld,%5lld\n",
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136 sws_format_name(srcFormat), srcW, srcH,
137 sws_format_name(dstFormat), dstW, dstH,
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138 flags,
139 ssdY, ssdU, ssdV);
140 }
141
142 end:
143
144 sws_freeContext(srcContext);
145 sws_freeContext(dstContext);
146 sws_freeContext(outContext);
147
148 for(i=0; i<3; i++){
149 free(src[i]);
150 free(dst[i]);
151 free(out[i]);
152 }
c9b99ea6 153
87656472 154 return res;
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155}
156
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157void fast_memcpy(void *a, void *b, int s){ //FIXME
158 memcpy(a, b, s);
159}
160
161static void selfTest(uint8_t *src[3], int stride[3], int w, int h){
87656472 162 enum PixelFormat srcFormat, dstFormat;
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163 int srcW, srcH, dstW, dstH;
164 int flags;
165
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166 for(srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {
167 for(dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {
168 printf("%s -> %s\n",
169 sws_format_name(srcFormat),
170 sws_format_name(dstFormat));
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171
172 srcW= w;
173 srcH= h;
174 for(dstW=w - w/3; dstW<= 4*w/3; dstW+= w/3){
175 for(dstH=h - h/3; dstH<= 4*h/3; dstH+= h/3){
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176 for(flags=1; flags<33; flags*=2) {
177 int res;
178
179 res = doTest(src, stride, w, h, srcFormat, dstFormat,
c9b99ea6 180 srcW, srcH, dstW, dstH, flags);
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181 if (res < 0) {
182 dstW = 4 * w / 3;
183 dstH = 4 * h / 3;
184 flags = 33;
185 }
186 }
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187 }
188 }
189 }
190 }
191}
192
193#define W 96
194#define H 96
195
196int main(int argc, char **argv){
197 uint8_t rgb_data[W*H*4];
198 uint8_t *rgb_src[3]= {rgb_data, NULL, NULL};
199 int rgb_stride[3]={4*W, 0, 0};
200 uint8_t data[3][W*H];
201 uint8_t *src[3]= {data[0], data[1], data[2]};
202 int stride[3]={W, W, W};
203 int x, y;
204 struct SwsContext *sws;
c9b99ea6 205
e9e12f0e 206 sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUV420P, 2, NULL, NULL, NULL);
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207
208 for(y=0; y<H; y++){
209 for(x=0; x<W*4; x++){
210 rgb_data[ x + y*4*W]= random();
211 }
212 }
6e1c66bc 213#if defined(ARCH_X86) || defined(ARCH_X86_64)
700490a4 214 sws_rgb2rgb_init(SWS_CPU_CAPS_MMX*0);
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215#else
216 sws_rgb2rgb_init(0);
217#endif
c9b99ea6 218 sws_scale(sws, rgb_src, rgb_stride, 0, H , src, stride);
27161c06 219
6e1c66bc 220#if defined(ARCH_X86) || defined(ARCH_X86_64)
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221 asm volatile ("emms\n\t");
222#endif
223
c9b99ea6 224 selfTest(src, stride, W, H);
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225
226 return 123;
c9b99ea6 227}