libswscale/swscale-test.c

   1 /*
   2  * Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * This file is part of Libav.
   5  *
   6  * Libav 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  * Libav 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 Libav; 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/imgutils.h"
  29 #include "libavutil/mem.h"
  30 #include "libavutil/avutil.h"
  31 #include "libavutil/crc.h"
  32 #include "libavutil/pixdesc.h"
  33 #include "libavutil/lfg.h"
  34 #include "swscale.h"
  35
  36 /* HACK Duplicated from swscale_internal.h.
  37  * Should be removed when a cleaner pixel format system exists. */
  38 #define isGray(x)                      \
  39     ((x) == AV_PIX_FMT_GRAY8       ||     \
  40      (x) == AV_PIX_FMT_Y400A       ||     \
  41      (x) == AV_PIX_FMT_GRAY16BE    ||     \
  42      (x) == AV_PIX_FMT_GRAY16LE)
  43 #define hasChroma(x)                   \
  44     (!(isGray(x)                ||     \
  45        (x) == AV_PIX_FMT_MONOBLACK ||     \
  46        (x) == AV_PIX_FMT_MONOWHITE))
  47 #define isALPHA(x)                     \
  48     ((x) == AV_PIX_FMT_BGR32   ||         \
  49      (x) == AV_PIX_FMT_BGR32_1 ||         \
  50      (x) == AV_PIX_FMT_RGB32   ||         \
  51      (x) == AV_PIX_FMT_RGB32_1 ||         \
  52      (x) == AV_PIX_FMT_YUVA420P)
  53
  54 static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1,
  55                        int stride2, int w, int h)
  56 {
  57     int x, y;
  58     uint64_t ssd = 0;
  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         }
  65     }
  66     return ssd;
  67 }
  68
  69 struct Results {
  70     uint64_t ssdY;
  71     uint64_t ssdU;
  72     uint64_t ssdV;
  73     uint64_t ssdA;
  74     uint32_t crc;
  75 };
  76
  77 // test by ref -> src -> dst -> out & compare out against ref
  78 // ref & out are YV12
  79 static int doTest(uint8_t *ref[4], int refStride[4], int w, int h,
  80                   enum AVPixelFormat srcFormat, enum AVPixelFormat dstFormat,
  81                   int srcW, int srcH, int dstW, int dstH, int flags,
  82                   struct Results *r)
  83 {
  84     const AVPixFmtDescriptor *desc_yuva420p = av_pix_fmt_desc_get(AV_PIX_FMT_YUVA420P);
  85     const AVPixFmtDescriptor *desc_src      = av_pix_fmt_desc_get(srcFormat);
  86     const AVPixFmtDescriptor *desc_dst      = av_pix_fmt_desc_get(dstFormat);
  87     static enum AVPixelFormat cur_srcFormat;
  88     static int cur_srcW, cur_srcH;
  89     static uint8_t *src[4];
  90     static int srcStride[4];
  91     uint8_t *dst[4] = { 0 };
  92     uint8_t *out[4] = { 0 };
  93     int dstStride[4];
  94     int i;
  95     uint64_t ssdY, ssdU = 0, ssdV = 0, ssdA = 0;
  96     struct SwsContext *dstContext = NULL, *outContext = NULL;
  97     uint32_t crc = 0;
  98     int res      = 0;
  99
 100     if (cur_srcFormat != srcFormat || cur_srcW != srcW || cur_srcH != srcH) {
 101         struct SwsContext *srcContext = NULL;
 102         int p;
 103
 104         for (p = 0; p < 4; p++)
 105             av_freep(&src[p]);
 106
 107         av_image_fill_linesizes(srcStride, srcFormat, srcW);
 108         for (p = 0; p < 4; p++) {
 109             if (srcStride[p])
 110                 src[p] = av_mallocz(srcStride[p] * srcH + 16);
 111             if (srcStride[p] && !src[p]) {
 112                 perror("Malloc");
 113                 res = -1;
 114                 goto end;
 115             }
 116         }
 117         srcContext = sws_getContext(w, h, AV_PIX_FMT_YUVA420P, srcW, srcH,
 118                                     srcFormat, SWS_BILINEAR, NULL, NULL, NULL);
 119         if (!srcContext) {
 120             fprintf(stderr, "Failed to get %s ---> %s\n",
 121                     desc_yuva420p->name,
 122                     desc_src->name);
 123             res = -1;
 124             goto end;
 125         }
 126         sws_scale(srcContext, ref, refStride, 0, h, src, srcStride);
 127         sws_freeContext(srcContext);
 128
 129         cur_srcFormat = srcFormat;
 130         cur_srcW      = srcW;
 131         cur_srcH      = srcH;
 132     }
 133
 134     av_image_fill_linesizes(dstStride, dstFormat, dstW);
 135     for (i = 0; i < 4; i++) {
 136         /* Image buffers passed into libswscale can be allocated any way you
 137          * prefer, as long as they're aligned enough for the architecture, and
 138          * they're freed appropriately (such as using av_free for buffers
 139          * allocated with av_malloc). */
 140         /* An extra 16 bytes is being allocated because some scalers may write
 141          * out of bounds. */
 142         if (dstStride[i])
 143             dst[i] = av_mallocz(dstStride[i] * dstH + 16);
 144         if (dstStride[i] && !dst[i]) {
 145             perror("Malloc");
 146             res = -1;
 147
 148             goto end;
 149         }
 150     }
 151
 152     dstContext = sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat,
 153                                 flags, NULL, NULL, NULL);
 154     if (!dstContext) {
 155         fprintf(stderr, "Failed to get %s ---> %s\n",
 156                 desc_src->name, desc_dst->name);
 157         res = -1;
 158         goto end;
 159     }
 160
 161     printf(" %s %dx%d -> %s %3dx%3d flags=%2d",
 162            desc_src->name, srcW, srcH,
 163            desc_dst->name, dstW, dstH,
 164            flags);
 165     fflush(stdout);
 166
 167     sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
 168
 169     for (i = 0; i < 4 && dstStride[i]; i++)
 170         crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), crc, dst[i],
 171                      dstStride[i] * dstH);
 172
 173     if (r && crc == r->crc) {
 174         ssdY = r->ssdY;
 175         ssdU = r->ssdU;
 176         ssdV = r->ssdV;
 177         ssdA = r->ssdA;
 178     } else {
 179         for (i = 0; i < 4; i++) {
 180             if (refStride[i])
 181                 out[i] = av_mallocz(refStride[i] * h);
 182             if (refStride[i] && !out[i]) {
 183                 perror("Malloc");
 184                 res = -1;
 185                 goto end;
 186             }
 187         }
 188         outContext = sws_getContext(dstW, dstH, dstFormat, w, h,
 189                                     AV_PIX_FMT_YUVA420P, SWS_BILINEAR,
 190                                     NULL, NULL, NULL);
 191         if (!outContext) {
 192             fprintf(stderr, "Failed to get %s ---> %s\n",
 193                     desc_dst->name,
 194                     desc_yuva420p->name);
 195             res = -1;
 196             goto end;
 197         }
 198         sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
 199
 200         ssdY = getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
 201         if (hasChroma(srcFormat) && hasChroma(dstFormat)) {
 202             //FIXME check that output is really gray
 203             ssdU = getSSD(ref[1], out[1], refStride[1], refStride[1],
 204                           (w + 1) >> 1, (h + 1) >> 1);
 205             ssdV = getSSD(ref[2], out[2], refStride[2], refStride[2],
 206                           (w + 1) >> 1, (h + 1) >> 1);
 207         }
 208         if (isALPHA(srcFormat) && isALPHA(dstFormat))
 209             ssdA = getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);
 210
 211         ssdY /= w * h;
 212         ssdU /= w * h / 4;
 213         ssdV /= w * h / 4;
 214         ssdA /= w * h;
 215
 216         sws_freeContext(outContext);
 217
 218         for (i = 0; i < 4; i++)
 219             if (refStride[i])
 220                 av_free(out[i]);
 221     }
 222
 223     printf(" CRC=%08x SSD=%5"PRId64 ",%5"PRId64 ",%5"PRId64 ",%5"PRId64 "\n",
 224            crc, ssdY, ssdU, ssdV, ssdA);
 225
 226 end:
 227     sws_freeContext(dstContext);
 228
 229     for (i = 0; i < 4; i++)
 230         if (dstStride[i])
 231             av_free(dst[i]);
 232
 233     return res;
 234 }
 235
 236 static void selfTest(uint8_t *ref[4], int refStride[4], int w, int h,
 237                      enum AVPixelFormat srcFormat_in,
 238                      enum AVPixelFormat dstFormat_in)
 239 {
 240     const int flags[] = { SWS_FAST_BILINEAR, SWS_BILINEAR, SWS_BICUBIC,
 241                           SWS_X, SWS_POINT, SWS_AREA, 0 };
 242     const int srcW   = w;
 243     const int srcH   = h;
 244     const int dstW[] = { srcW - srcW / 3, srcW, srcW + srcW / 3, 0 };
 245     const int dstH[] = { srcH - srcH / 3, srcH, srcH + srcH / 3, 0 };
 246     enum AVPixelFormat srcFormat, dstFormat;
 247     const AVPixFmtDescriptor *desc_src, *desc_dst;
 248
 249     for (srcFormat = srcFormat_in != AV_PIX_FMT_NONE ? srcFormat_in : 0;
 250          srcFormat < AV_PIX_FMT_NB; srcFormat++) {
 251         if (!sws_isSupportedInput(srcFormat) ||
 252             !sws_isSupportedOutput(srcFormat))
 253             continue;
 254
 255         desc_src = av_pix_fmt_desc_get(srcFormat);
 256
 257         for (dstFormat = dstFormat_in != AV_PIX_FMT_NONE ? dstFormat_in : 0;
 258              dstFormat < AV_PIX_FMT_NB; dstFormat++) {
 259             int i, j, k;
 260             int res = 0;
 261
 262             if (!sws_isSupportedInput(dstFormat) ||
 263                 !sws_isSupportedOutput(dstFormat))
 264                 continue;
 265
 266             desc_dst = av_pix_fmt_desc_get(dstFormat);
 267
 268             printf("%s -> %s\n", desc_src->name, desc_dst->name);
 269             fflush(stdout);
 270
 271             for (k = 0; flags[k] && !res; k++)
 272                 for (i = 0; dstW[i] && !res; i++)
 273                     for (j = 0; dstH[j] && !res; j++)
 274                         res = doTest(ref, refStride, w, h,
 275                                      srcFormat, dstFormat,
 276                                      srcW, srcH, dstW[i], dstH[j], flags[k],
 277                                      NULL);
 278             if (dstFormat_in != AV_PIX_FMT_NONE)
 279                 break;
 280         }
 281         if (srcFormat_in != AV_PIX_FMT_NONE)
 282             break;
 283     }
 284 }
 285
 286 static int fileTest(uint8_t *ref[4], int refStride[4], int w, int h, FILE *fp,
 287                     enum AVPixelFormat srcFormat_in,
 288                     enum AVPixelFormat dstFormat_in)
 289 {
 290     char buf[256];
 291
 292     while (fgets(buf, sizeof(buf), fp)) {
 293         struct Results r;
 294         enum AVPixelFormat srcFormat;
 295         char srcStr[12];
 296         int srcW, srcH;
 297         enum AVPixelFormat dstFormat;
 298         char dstStr[12];
 299         int dstW, dstH;
 300         int flags;
 301         int ret;
 302
 303         ret = sscanf(buf,
 304                      " %12s %dx%d -> %12s %dx%d flags=%d CRC=%x"
 305                      " SSD=%"PRId64 ", %"PRId64 ", %"PRId64 ", %"PRId64 "\n",
 306                      srcStr, &srcW, &srcH, dstStr, &dstW, &dstH,
 307                      &flags, &r.crc, &r.ssdY, &r.ssdU, &r.ssdV, &r.ssdA);
 308         if (ret != 12) {
 309             srcStr[0] = dstStr[0] = 0;
 310             ret       = sscanf(buf, "%12s -> %12s\n", srcStr, dstStr);
 311         }
 312
 313         srcFormat = av_get_pix_fmt(srcStr);
 314         dstFormat = av_get_pix_fmt(dstStr);
 315
 316         if (srcFormat == AV_PIX_FMT_NONE || dstFormat == AV_PIX_FMT_NONE) {
 317             fprintf(stderr, "malformed input file\n");
 318             return -1;
 319         }
 320         if ((srcFormat_in != AV_PIX_FMT_NONE && srcFormat_in != srcFormat) ||
 321             (dstFormat_in != AV_PIX_FMT_NONE && dstFormat_in != dstFormat))
 322             continue;
 323         if (ret != 12) {
 324             printf("%s", buf);
 325             continue;
 326         }
 327
 328         doTest(ref, refStride, w, h,
 329                srcFormat, dstFormat,
 330                srcW, srcH, dstW, dstH, flags,
 331                &r);
 332     }
 333
 334     return 0;
 335 }
 336
 337 #define W 96
 338 #define H 96
 339
 340 int main(int argc, char **argv)
 341 {
 342     enum AVPixelFormat srcFormat = AV_PIX_FMT_NONE;
 343     enum AVPixelFormat dstFormat = AV_PIX_FMT_NONE;
 344     uint8_t *rgb_data   = av_malloc(W * H * 4);
 345     uint8_t *rgb_src[4] = { rgb_data, NULL, NULL, NULL };
 346     int rgb_stride[4]   = { 4 * W, 0, 0, 0 };
 347     uint8_t *data       = av_malloc(4 * W * H);
 348     uint8_t *src[4]     = { data, data + W * H, data + W * H * 2, data + W * H * 3 };
 349     int stride[4]       = { W, W, W, W };
 350     int x, y;
 351     struct SwsContext *sws;
 352     AVLFG rand;
 353     int res = -1;
 354     int i;
 355
 356     if (!rgb_data || !data)
 357         return -1;
 358
 359     sws = sws_getContext(W / 12, H / 12, AV_PIX_FMT_RGB32, W, H,
 360                          AV_PIX_FMT_YUVA420P, SWS_BILINEAR, NULL, NULL, NULL);
 361
 362     av_lfg_init(&rand, 1);
 363
 364     for (y = 0; y < H; y++)
 365         for (x = 0; x < W * 4; x++)
 366             rgb_data[ x + y * 4 * W] = av_lfg_get(&rand);
 367     sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
 368     sws_freeContext(sws);
 369     av_free(rgb_data);
 370
 371     for (i = 1; i < argc; i += 2) {
 372         if (argv[i][0] != '-' || i + 1 == argc)
 373             goto bad_option;
 374         if (!strcmp(argv[i], "-ref")) {
 375             FILE *fp = fopen(argv[i + 1], "r");
 376             if (!fp) {
 377                 fprintf(stderr, "could not open '%s'\n", argv[i + 1]);
 378                 goto error;
 379             }
 380             res = fileTest(src, stride, W, H, fp, srcFormat, dstFormat);
 381             fclose(fp);
 382             goto end;
 383         } else if (!strcmp(argv[i], "-src")) {
 384             srcFormat = av_get_pix_fmt(argv[i + 1]);
 385             if (srcFormat == AV_PIX_FMT_NONE) {
 386                 fprintf(stderr, "invalid pixel format %s\n", argv[i + 1]);
 387                 return -1;
 388             }
 389         } else if (!strcmp(argv[i], "-dst")) {
 390             dstFormat = av_get_pix_fmt(argv[i + 1]);
 391             if (dstFormat == AV_PIX_FMT_NONE) {
 392                 fprintf(stderr, "invalid pixel format %s\n", argv[i + 1]);
 393                 return -1;
 394             }
 395         } else {
 396 bad_option:
 397             fprintf(stderr, "bad option or argument missing (%s)\n", argv[i]);
 398             goto error;
 399         }
 400     }
 401
 402     selfTest(src, stride, W, H, srcFormat, dstFormat);
 403 end:
 404     res = 0;
 405 error:
 406     av_free(data);
 407
 408     return res;
 409 }