Statistics
| Branch: | Revision:

ffmpeg / libswscale / swscale-example.c @ 5d5a8813

History | View | Annotate | Download (6.91 KB)

1
/*
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
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.
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 GNU
14
 * Lesser General Public License for more details.
15
 *
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
18
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19
 */
20

    
21
#include <stdio.h>
22
#include <stdlib.h>
23
#include <string.h>
24
#include <inttypes.h>
25
#include <stdarg.h>
26

    
27
#undef HAVE_AV_CONFIG_H
28
#include "libavutil/avutil.h"
29
#include "libavutil/lfg.h"
30
#include "swscale.h"
31
#include "swscale_internal.h"
32

    
33
static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h){
34
    int x,y;
35
    uint64_t ssd=0;
36

    
37
//printf("%d %d\n", w, h);
38

    
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;
43
//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );
44
        }
45
//printf("\n");
46
    }
47
    return ssd;
48
}
49

    
50
// test by ref -> src -> dst -> out & compare out against ref
51
// ref & out are YV12
52
static int doTest(uint8_t *ref[4], int refStride[4], int w, int h, int srcFormat, int dstFormat,
53
                  int srcW, int srcH, int dstW, int dstH, int flags){
54
    uint8_t *src[4] = {0};
55
    uint8_t *dst[4] = {0};
56
    uint8_t *out[4] = {0};
57
    int srcStride[4], dstStride[4];
58
    int i;
59
    uint64_t ssdY, ssdU, ssdV, ssdA=0;
60
    struct SwsContext *srcContext = NULL, *dstContext = NULL,
61
                      *outContext = NULL;
62
    int res;
63

    
64
    res = 0;
65
    for (i=0; i<4; i++){
66
        // avoid stride % bpp != 0
67
        if (srcFormat==PIX_FMT_RGB24 || srcFormat==PIX_FMT_BGR24)
68
            srcStride[i]= srcW*3;
69
        else if (srcFormat==PIX_FMT_RGB48BE || srcFormat==PIX_FMT_RGB48LE)
70
            srcStride[i]= srcW*6;
71
        else
72
            srcStride[i]= srcW*4;
73

    
74
        if (dstFormat==PIX_FMT_RGB24 || dstFormat==PIX_FMT_BGR24)
75
            dstStride[i]= dstW*3;
76
        else if (dstFormat==PIX_FMT_RGB48BE || dstFormat==PIX_FMT_RGB48LE)
77
            dstStride[i]= dstW*6;
78
        else
79
            dstStride[i]= dstW*4;
80

    
81
        src[i]= (uint8_t*) malloc(srcStride[i]*srcH);
82
        dst[i]= (uint8_t*) malloc(dstStride[i]*dstH);
83
        out[i]= (uint8_t*) malloc(refStride[i]*h);
84
        if (!src[i] || !dst[i] || !out[i]) {
85
            perror("Malloc");
86
            res = -1;
87

    
88
            goto end;
89
        }
90
    }
91

    
92
    srcContext= sws_getContext(w, h, PIX_FMT_YUVA420P, srcW, srcH, srcFormat, flags, NULL, NULL, NULL);
93
    if (!srcContext) {
94
        fprintf(stderr, "Failed to get %s ---> %s\n",
95
                sws_format_name(PIX_FMT_YUVA420P),
96
                sws_format_name(srcFormat));
97
        res = -1;
98

    
99
        goto end;
100
    }
101
    dstContext= sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, NULL, NULL, NULL);
102
    if (!dstContext) {
103
        fprintf(stderr, "Failed to get %s ---> %s\n",
104
                sws_format_name(srcFormat),
105
                sws_format_name(dstFormat));
106
        res = -1;
107

    
108
        goto end;
109
    }
110
    outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUVA420P, flags, NULL, NULL, NULL);
111
    if (!outContext) {
112
        fprintf(stderr, "Failed to get %s ---> %s\n",
113
                sws_format_name(dstFormat),
114
                sws_format_name(PIX_FMT_YUVA420P));
115
        res = -1;
116

    
117
        goto end;
118
    }
119
//    printf("test %X %X %X -> %X %X %X\n", (int)ref[0], (int)ref[1], (int)ref[2],
120
//        (int)src[0], (int)src[1], (int)src[2]);
121

    
122
    sws_scale(srcContext, ref, refStride, 0, h   , src, srcStride);
123
    sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
124
    sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
125

    
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);
129
    if (isALPHA(srcFormat) && isALPHA(dstFormat))
130
        ssdA= getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);
131

    
132
    if (srcFormat == PIX_FMT_GRAY8 || dstFormat==PIX_FMT_GRAY8) ssdU=ssdV=0; //FIXME check that output is really gray
133

    
134
    ssdY/= w*h;
135
    ssdU/= w*h/4;
136
    ssdV/= w*h/4;
137
    ssdA/= w*h;
138

    
139
    printf(" %s %dx%d -> %s %4dx%4d flags=%2d SSD=%5"PRId64",%5"PRId64",%5"PRId64",%5"PRId64"\n",
140
           sws_format_name(srcFormat), srcW, srcH,
141
           sws_format_name(dstFormat), dstW, dstH,
142
           flags, ssdY, ssdU, ssdV, ssdA);
143
    fflush(stdout);
144

    
145
    end:
146

    
147
    sws_freeContext(srcContext);
148
    sws_freeContext(dstContext);
149
    sws_freeContext(outContext);
150

    
151
    for (i=0; i<4; i++){
152
        free(src[i]);
153
        free(dst[i]);
154
        free(out[i]);
155
    }
156

    
157
    return res;
158
}
159

    
160
static void selfTest(uint8_t *src[4], int stride[4], int w, int h){
161
    enum PixelFormat srcFormat, dstFormat;
162
    int srcW, srcH, dstW, dstH;
163
    int flags;
164

    
165
    for (srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {
166
        for (dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {
167
            printf("%s -> %s\n",
168
                   sws_format_name(srcFormat),
169
                   sws_format_name(dstFormat));
170
            fflush(stdout);
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){
176
                    for (flags=1; flags<33; flags*=2) {
177
                        int res;
178

    
179
                        res = doTest(src, stride, w, h, srcFormat, dstFormat,
180
                                     srcW, srcH, dstW, dstH, flags);
181
                        if (res < 0) {
182
                            dstW = 4 * w / 3;
183
                            dstH = 4 * h / 3;
184
                            flags = 33;
185
                        }
186
                    }
187
                }
188
            }
189
        }
190
    }
191
}
192

    
193
#define W 96
194
#define H 96
195

    
196
int main(int argc, char **argv){
197
    uint8_t *rgb_data = malloc (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 = malloc (4*W*H);
201
    uint8_t *src[4]= {data, data+W*H, data+W*H*2, data+W*H*3};
202
    int stride[4]={W, W, W, W};
203
    int x, y;
204
    struct SwsContext *sws;
205
    AVLFG rand;
206

    
207
    sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUVA420P, 2, NULL, NULL, NULL);
208

    
209
    av_lfg_init(&rand, 1);
210

    
211
    for (y=0; y<H; y++){
212
        for (x=0; x<W*4; x++){
213
            rgb_data[ x + y*4*W]= av_lfg_get(&rand);
214
        }
215
    }
216
    sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
217

    
218
    selfTest(src, stride, W, H);
219

    
220
    return 123;
221
}