Remove redundant &.
[libav.git] / libswscale / swscale-example.c
CommitLineData
c9b99ea6 1/*
d026b45e
DB
2 * Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * 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 */
c9b99ea6
MN
20
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <inttypes.h>
25#include <stdarg.h>
26
e9e12f0e
LA
27#undef HAVE_AV_CONFIG_H
28#include "avutil.h"
c9b99ea6 29#include "swscale.h"
632d8739
DB
30#include "swscale_internal.h"
31#include "rgb2rgb.h"
c9b99ea6 32
c9b99ea6 33static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h){
221b804f
DB
34 int x,y;
35 uint64_t ssd=0;
c9b99ea6
MN
36
37//printf("%d %d\n", w, h);
6a4970ab 38
221b804f
DB
39 for (y=0; y<h; y++){
40 for (x=0; x<w; x++){
41 int d= src1[x + y*stride1] - src2[x + y*stride2];
42 ssd+= d*d;
c9b99ea6 43//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );
221b804f 44 }
c9b99ea6 45//printf("\n");
221b804f
DB
46 }
47 return ssd;
c9b99ea6
MN
48}
49
50// test by ref -> src -> dst -> out & compare out against ref
51// ref & out are YV12
6a4970ab 52static int doTest(uint8_t *ref[3], int refStride[3], int w, int h, int srcFormat, int dstFormat,
221b804f
DB
53 int srcW, int srcH, int dstW, int dstH, int flags){
54 uint8_t *src[3];
55 uint8_t *dst[3];
56 uint8_t *out[3];
57 int srcStride[3], dstStride[3];
58 int i;
59 uint64_t ssdY, ssdU, ssdV;
60 struct SwsContext *srcContext, *dstContext, *outContext;
61 int res;
62
63 res = 0;
64 for (i=0; i<3; i++){
65 // avoid stride % bpp != 0
66 if (srcFormat==PIX_FMT_RGB24 || srcFormat==PIX_FMT_BGR24)
67 srcStride[i]= srcW*3;
68 else
69 srcStride[i]= srcW*4;
70
71 if (dstFormat==PIX_FMT_RGB24 || dstFormat==PIX_FMT_BGR24)
72 dstStride[i]= dstW*3;
73 else
74 dstStride[i]= dstW*4;
75
76 src[i]= (uint8_t*) malloc(srcStride[i]*srcH);
77 dst[i]= (uint8_t*) malloc(dstStride[i]*dstH);
78 out[i]= (uint8_t*) malloc(refStride[i]*h);
1b0a4572 79 if (!src[i] || !dst[i] || !out[i]) {
221b804f
DB
80 perror("Malloc");
81 res = -1;
82
83 goto end;
84 }
85 }
86
87 dstContext = outContext = NULL;
88 srcContext= sws_getContext(w, h, PIX_FMT_YUV420P, srcW, srcH, srcFormat, flags, NULL, NULL, NULL);
1b0a4572 89 if (!srcContext) {
221b804f
DB
90 fprintf(stderr, "Failed to get %s ---> %s\n",
91 sws_format_name(PIX_FMT_YUV420P),
92 sws_format_name(srcFormat));
93 res = -1;
94
95 goto end;
96 }
97 dstContext= sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, NULL, NULL, NULL);
1b0a4572 98 if (!dstContext) {
221b804f
DB
99 fprintf(stderr, "Failed to get %s ---> %s\n",
100 sws_format_name(srcFormat),
101 sws_format_name(dstFormat));
102 res = -1;
103
104 goto end;
105 }
106 outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUV420P, flags, NULL, NULL, NULL);
1b0a4572 107 if (!outContext) {
221b804f
DB
108 fprintf(stderr, "Failed to get %s ---> %s\n",
109 sws_format_name(dstFormat),
110 sws_format_name(PIX_FMT_YUV420P));
111 res = -1;
112
113 goto end;
114 }
115// printf("test %X %X %X -> %X %X %X\n", (int)ref[0], (int)ref[1], (int)ref[2],
116// (int)src[0], (int)src[1], (int)src[2]);
117
118 sws_scale(srcContext, ref, refStride, 0, h , src, srcStride);
119 sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
120 sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
27161c06 121
3d6a30d9 122#if defined(ARCH_X86)
221b804f 123 asm volatile ("emms\n\t");
27161c06 124#endif
6a4970ab 125
221b804f
DB
126 ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
127 ssdU= getSSD(ref[1], out[1], refStride[1], refStride[1], (w+1)>>1, (h+1)>>1);
128 ssdV= getSSD(ref[2], out[2], refStride[2], refStride[2], (w+1)>>1, (h+1)>>1);
6a4970ab 129
221b804f 130 if (srcFormat == PIX_FMT_GRAY8 || dstFormat==PIX_FMT_GRAY8) ssdU=ssdV=0; //FIXME check that output is really gray
6a4970ab 131
221b804f
DB
132 ssdY/= w*h;
133 ssdU/= w*h/4;
134 ssdV/= w*h/4;
6a4970ab 135
221b804f
DB
136 if (ssdY>100 || ssdU>100 || ssdV>100){
137 printf(" %s %dx%d -> %s %4dx%4d flags=%2d SSD=%5lld,%5lld,%5lld\n",
138 sws_format_name(srcFormat), srcW, srcH,
139 sws_format_name(dstFormat), dstW, dstH,
140 flags,
141 ssdY, ssdU, ssdV);
142 }
c9b99ea6 143
221b804f 144 end:
6a4970ab 145
221b804f
DB
146 sws_freeContext(srcContext);
147 sws_freeContext(dstContext);
148 sws_freeContext(outContext);
c9b99ea6 149
221b804f
DB
150 for (i=0; i<3; i++){
151 free(src[i]);
152 free(dst[i]);
153 free(out[i]);
154 }
c9b99ea6 155
221b804f 156 return res;
c9b99ea6
MN
157}
158
c9b99ea6
MN
159void fast_memcpy(void *a, void *b, int s){ //FIXME
160 memcpy(a, b, s);
161}
162
163static void selfTest(uint8_t *src[3], int stride[3], int w, int h){
221b804f
DB
164 enum PixelFormat srcFormat, dstFormat;
165 int srcW, srcH, dstW, dstH;
166 int flags;
167
168 for (srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {
169 for (dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {
170 printf("%s -> %s\n",
171 sws_format_name(srcFormat),
172 sws_format_name(dstFormat));
173
174 srcW= w;
175 srcH= h;
176 for (dstW=w - w/3; dstW<= 4*w/3; dstW+= w/3){
177 for (dstH=h - h/3; dstH<= 4*h/3; dstH+= h/3){
178 for (flags=1; flags<33; flags*=2) {
179 int res;
180
181 res = doTest(src, stride, w, h, srcFormat, dstFormat,
182 srcW, srcH, dstW, dstH, flags);
183 if (res < 0) {
184 dstW = 4 * w / 3;
185 dstH = 4 * h / 3;
186 flags = 33;
187 }
188 }
189 }
190 }
191 }
192 }
c9b99ea6
MN
193}
194
195#define W 96
196#define H 96
197
198int main(int argc, char **argv){
221b804f
DB
199 uint8_t *rgb_data = malloc (W*H*4);
200 uint8_t *rgb_src[3]= {rgb_data, NULL, NULL};
201 int rgb_stride[3]={4*W, 0, 0};
202 uint8_t *data = malloc (3*W*H);
203 uint8_t *src[3]= {data, data+W*H, data+W*H*2};
204 int stride[3]={W, W, W};
205 int x, y;
206 struct SwsContext *sws;
207
208 sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUV420P, 2, NULL, NULL, NULL);
209
210 for (y=0; y<H; y++){
211 for (x=0; x<W*4; x++){
212 rgb_data[ x + y*4*W]= random();
213 }
214 }
3d6a30d9 215#if defined(ARCH_X86)
221b804f 216 sws_rgb2rgb_init(SWS_CPU_CAPS_MMX*0);
27161c06 217#else
221b804f 218 sws_rgb2rgb_init(0);
27161c06 219#endif
e5091488 220 sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
27161c06 221
3d6a30d9 222#if defined(ARCH_X86)
221b804f 223 asm volatile ("emms\n\t");
27161c06
AB
224#endif
225
e5091488 226 selfTest(src, stride, W, H);
516b1f82 227
221b804f 228 return 123;
c9b99ea6 229}