Statistics
| Branch: | Revision:

ffmpeg / libswscale / swscale-example.c @ 591e465a

History | View | Annotate | Download (7.71 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

    
32
/* HACK Duplicated from swscale_internal.h.
33
 * Should be removed when a cleaner pixel format system exists. */
34
const char *sws_format_name(enum PixelFormat format);
35
#define isGray(x)       (           \
36
           (x)==PIX_FMT_GRAY8       \
37
        || (x)==PIX_FMT_GRAY16BE    \
38
        || (x)==PIX_FMT_GRAY16LE    \
39
    )
40
#define hasChroma(x)   (!(          \
41
            isGray(x)               \
42
        || (x)==PIX_FMT_MONOBLACK   \
43
        || (x)==PIX_FMT_MONOWHITE   \
44
    ))
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
    )
52

    
53
static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h)
54
{
55
    int x,y;
56
    uint64_t ssd=0;
57

    
58
//printf("%d %d\n", w, h);
59

    
60
    for (y=0; y<h; y++) {
61
        for (x=0; x<w; x++) {
62
            int d= src1[x + y*stride1] - src2[x + y*stride2];
63
            ssd+= d*d;
64
//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );
65
        }
66
//printf("\n");
67
    }
68
    return ssd;
69
}
70

    
71
// test by ref -> src -> dst -> out & compare out against ref
72
// ref & out are YV12
73
static int doTest(uint8_t *ref[4], int refStride[4], int w, int h, enum PixelFormat srcFormat, enum PixelFormat dstFormat,
74
                  int srcW, int srcH, int dstW, int dstH, int flags)
75
{
76
    uint8_t *src[4] = {0};
77
    uint8_t *dst[4] = {0};
78
    uint8_t *out[4] = {0};
79
    int srcStride[4], dstStride[4];
80
    int i;
81
    uint64_t ssdY, ssdU=0, ssdV=0, ssdA=0;
82
    struct SwsContext *srcContext = NULL, *dstContext = NULL,
83
                      *outContext = NULL;
84
    int res;
85

    
86
    res = 0;
87
    for (i=0; i<4; i++) {
88
        // avoid stride % bpp != 0
89
        if (srcFormat==PIX_FMT_RGB24 || srcFormat==PIX_FMT_BGR24)
90
            srcStride[i]= srcW*3;
91
        else if (srcFormat==PIX_FMT_RGB48BE || srcFormat==PIX_FMT_RGB48LE)
92
            srcStride[i]= srcW*6;
93
        else
94
            srcStride[i]= srcW*4;
95

    
96
        if (dstFormat==PIX_FMT_RGB24 || dstFormat==PIX_FMT_BGR24)
97
            dstStride[i]= dstW*3;
98
        else if (dstFormat==PIX_FMT_RGB48BE || dstFormat==PIX_FMT_RGB48LE)
99
            dstStride[i]= dstW*6;
100
        else
101
            dstStride[i]= dstW*4;
102

    
103
        src[i]= malloc(srcStride[i]*srcH);
104
        dst[i]= malloc(dstStride[i]*dstH);
105
        out[i]= malloc(refStride[i]*h);
106
        if (!src[i] || !dst[i] || !out[i]) {
107
            perror("Malloc");
108
            res = -1;
109

    
110
            goto end;
111
        }
112
    }
113

    
114
    srcContext= sws_getContext(w, h, PIX_FMT_YUVA420P, srcW, srcH, srcFormat, flags, NULL, NULL, NULL);
115
    if (!srcContext) {
116
        fprintf(stderr, "Failed to get %s ---> %s\n",
117
                sws_format_name(PIX_FMT_YUVA420P),
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);
124
    if (!dstContext) {
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
    }
132
    outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUVA420P, flags, NULL, NULL, NULL);
133
    if (!outContext) {
134
        fprintf(stderr, "Failed to get %s ---> %s\n",
135
                sws_format_name(dstFormat),
136
                sws_format_name(PIX_FMT_YUVA420P));
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);
147

    
148
    ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
149
    if (hasChroma(srcFormat) && hasChroma(dstFormat)) {
150
        //FIXME check that output is really gray
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);
153
    }
154
    if (isALPHA(srcFormat) && isALPHA(dstFormat))
155
        ssdA= getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);
156

    
157
    ssdY/= w*h;
158
    ssdU/= w*h/4;
159
    ssdV/= w*h/4;
160
    ssdA/= w*h;
161

    
162
    printf(" %s %dx%d -> %s %4dx%4d flags=%2d SSD=%5"PRId64",%5"PRId64",%5"PRId64",%5"PRId64"\n",
163
           sws_format_name(srcFormat), srcW, srcH,
164
           sws_format_name(dstFormat), dstW, dstH,
165
           flags, ssdY, ssdU, ssdV, ssdA);
166
    fflush(stdout);
167

    
168
end:
169

    
170
    sws_freeContext(srcContext);
171
    sws_freeContext(dstContext);
172
    sws_freeContext(outContext);
173

    
174
    for (i=0; i<4; i++) {
175
        free(src[i]);
176
        free(dst[i]);
177
        free(out[i]);
178
    }
179

    
180
    return res;
181
}
182

    
183
static void selfTest(uint8_t *ref[4], int refStride[4], int w, int h)
184
{
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 };
192
    enum PixelFormat srcFormat, dstFormat;
193

    
194
    for (srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {
195
        for (dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {
196
            int i, j, k;
197
            int res = 0;
198

    
199
            printf("%s -> %s\n",
200
                   sws_format_name(srcFormat),
201
                   sws_format_name(dstFormat));
202
            fflush(stdout);
203

    
204
            for (i = 0; dstW[i] && !res; i++)
205
                for (j = 0; dstH[j] && !res; j++)
206
                    for (k = 0; flags[k] && !res; k++)
207
                        res = doTest(ref, refStride, w, h, srcFormat, dstFormat,
208
                                     srcW, srcH, dstW[i], dstH[j], flags[k]);
209
        }
210
    }
211
}
212

    
213
#define W 96
214
#define H 96
215

    
216
int main(int argc, char **argv)
217
{
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};
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};
224
    int x, y;
225
    struct SwsContext *sws;
226
    AVLFG rand;
227

    
228
    if (!rgb_data || !data)
229
        return -1;
230

    
231
    sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUVA420P, SWS_BILINEAR, NULL, NULL, NULL);
232

    
233
    av_lfg_init(&rand, 1);
234

    
235
    for (y=0; y<H; y++) {
236
        for (x=0; x<W*4; x++) {
237
            rgb_data[ x + y*4*W]= av_lfg_get(&rand);
238
        }
239
    }
240
    sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
241
    sws_freeContext(sws);
242
    free(rgb_data);
243

    
244
    selfTest(src, stride, W, H);
245
    free(data);
246

    
247
    return 0;
248
}