aboutsummaryrefslogtreecommitdiffstats
path: root/libswscale/swscale-example.c
blob: e53c0b3ebfe8bbd098a55bf36848e9760e67ddc0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
/*
 * Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <stdarg.h>

#undef HAVE_AV_CONFIG_H
#include "avutil.h"
#include "swscale.h"
#include "swscale_internal.h"
#include "rgb2rgb.h"

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

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

    for (y=0; y<h; y++){
        for (x=0; x<w; x++){
            int d= src1[x + y*stride1] - src2[x + y*stride2];
            ssd+= d*d;
//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );
        }
//printf("\n");
    }
    return ssd;
}

// test by ref -> src -> dst -> out & compare out against ref
// ref & out are YV12
static int doTest(uint8_t *ref[3], int refStride[3], int w, int h, int srcFormat, int dstFormat,
                  int srcW, int srcH, int dstW, int dstH, int flags){
    uint8_t *src[3];
    uint8_t *dst[3];
    uint8_t *out[3];
    int srcStride[3], dstStride[3];
    int i;
    uint64_t ssdY, ssdU, ssdV;
    struct SwsContext *srcContext, *dstContext, *outContext;
    int res;

    res = 0;
    for (i=0; i<3; i++){
        // avoid stride % bpp != 0
        if (srcFormat==PIX_FMT_RGB24 || srcFormat==PIX_FMT_BGR24)
            srcStride[i]= srcW*3;
        else
            srcStride[i]= srcW*4;

        if (dstFormat==PIX_FMT_RGB24 || dstFormat==PIX_FMT_BGR24)
            dstStride[i]= dstW*3;
        else
            dstStride[i]= dstW*4;

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

            goto end;
        }
    }

    dstContext = outContext = NULL;
    srcContext= sws_getContext(w, h, PIX_FMT_YUV420P, srcW, srcH, srcFormat, flags, NULL, NULL, NULL);
    if (!srcContext) {
        fprintf(stderr, "Failed to get %s ---> %s\n",
                sws_format_name(PIX_FMT_YUV420P),
                sws_format_name(srcFormat));
        res = -1;

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

        goto end;
    }
    outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUV420P, flags, NULL, NULL, NULL);
    if (!outContext) {
        fprintf(stderr, "Failed to get %s ---> %s\n",
                sws_format_name(dstFormat),
                sws_format_name(PIX_FMT_YUV420P));
        res = -1;

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

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

#if defined(ARCH_X86)
    asm volatile ("emms\n\t");
#endif

    ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
    ssdU= getSSD(ref[1], out[1], refStride[1], refStride[1], (w+1)>>1, (h+1)>>1);
    ssdV= getSSD(ref[2], out[2], refStride[2], refStride[2], (w+1)>>1, (h+1)>>1);

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

    ssdY/= w*h;
    ssdU/= w*h/4;
    ssdV/= w*h/4;

    if (ssdY>100 || ssdU>100 || ssdV>100){
        printf(" %s %dx%d -> %s %4dx%4d flags=%2d SSD=%5lld,%5lld,%5lld\n",
               sws_format_name(srcFormat), srcW, srcH,
               sws_format_name(dstFormat), dstW, dstH,
               flags,
               ssdY, ssdU, ssdV);
    }

    end:

    sws_freeContext(srcContext);
    sws_freeContext(dstContext);
    sws_freeContext(outContext);

    for (i=0; i<3; i++){
        free(src[i]);
        free(dst[i]);
        free(out[i]);
    }

    return res;
}

void fast_memcpy(void *a, void *b, int s){ //FIXME
    memcpy(a, b, s);
}

static void selfTest(uint8_t *src[3], int stride[3], int w, int h){
    enum PixelFormat srcFormat, dstFormat;
    int srcW, srcH, dstW, dstH;
    int flags;

    for (srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {
        for (dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {
            printf("%s -> %s\n",
                   sws_format_name(srcFormat),
                   sws_format_name(dstFormat));

            srcW= w;
            srcH= h;
            for (dstW=w - w/3; dstW<= 4*w/3; dstW+= w/3){
                for (dstH=h - h/3; dstH<= 4*h/3; dstH+= h/3){
                    for (flags=1; flags<33; flags*=2) {
                        int res;

                        res = doTest(src, stride, w, h, srcFormat, dstFormat,
                                     srcW, srcH, dstW, dstH, flags);
                        if (res < 0) {
                            dstW = 4 * w / 3;
                            dstH = 4 * h / 3;
                            flags = 33;
                        }
                    }
                }
            }
        }
    }
}

#define W 96
#define H 96

int main(int argc, char **argv){
    uint8_t *rgb_data = malloc (W*H*4);
    uint8_t *rgb_src[3]= {rgb_data, NULL, NULL};
    int rgb_stride[3]={4*W, 0, 0};
    uint8_t *data = malloc (3*W*H);
    uint8_t *src[3]= {data, data+W*H, data+W*H*2};
    int stride[3]={W, W, W};
    int x, y;
    struct SwsContext *sws;

    sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUV420P, 2, NULL, NULL, NULL);

    for (y=0; y<H; y++){
        for (x=0; x<W*4; x++){
            rgb_data[ x + y*4*W]= random();
        }
    }
#if defined(ARCH_X86)
    sws_rgb2rgb_init(SWS_CPU_CAPS_MMX*0);
#else
    sws_rgb2rgb_init(0);
#endif
    sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);

#if defined(ARCH_X86)
    asm volatile ("emms\n\t");
#endif

    selfTest(src, stride, W, H);

    return 123;
}