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libswscale/swscale-test.c

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00001 /*
00002  * Copyright (C) 2003-2011 Michael Niedermayer <michaelni@gmx.at>
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #include <stdio.h>
00022 #include <stdlib.h>
00023 #include <string.h>
00024 #include <inttypes.h>
00025 #include <stdarg.h>
00026 
00027 #undef HAVE_AV_CONFIG_H
00028 #include "libavutil/imgutils.h"
00029 #include "libavutil/mem.h"
00030 #include "libavutil/avutil.h"
00031 #include "libavutil/crc.h"
00032 #include "libavutil/pixdesc.h"
00033 #include "libavutil/lfg.h"
00034 #include "swscale.h"
00035 
00036 /* HACK Duplicated from swscale_internal.h.
00037  * Should be removed when a cleaner pixel format system exists. */
00038 #define isGray(x)                      \
00039     ((x) == PIX_FMT_GRAY8       ||     \
00040      (x) == PIX_FMT_Y400A       ||     \
00041      (x) == PIX_FMT_GRAY16BE    ||     \
00042      (x) == PIX_FMT_GRAY16LE)
00043 #define hasChroma(x)                   \
00044     (!(isGray(x)                ||     \
00045        (x) == PIX_FMT_MONOBLACK ||     \
00046        (x) == PIX_FMT_MONOWHITE))
00047 #define isALPHA(x)                     \
00048     ((x) == PIX_FMT_BGR32   ||         \
00049      (x) == PIX_FMT_BGR32_1 ||         \
00050      (x) == PIX_FMT_RGB32   ||         \
00051      (x) == PIX_FMT_RGB32_1 ||         \
00052      (x) == PIX_FMT_YUVA420P)
00053 
00054 static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1,
00055                        int stride2, int w, int h)
00056 {
00057     int x, y;
00058     uint64_t ssd = 0;
00059 
00060     for (y = 0; y < h; y++) {
00061         for (x = 0; x < w; x++) {
00062             int d = src1[x + y * stride1] - src2[x + y * stride2];
00063             ssd += d * d;
00064         }
00065     }
00066     return ssd;
00067 }
00068 
00069 struct Results {
00070     uint64_t ssdY;
00071     uint64_t ssdU;
00072     uint64_t ssdV;
00073     uint64_t ssdA;
00074     uint32_t crc;
00075 };
00076 
00077 // test by ref -> src -> dst -> out & compare out against ref
00078 // ref & out are YV12
00079 static int doTest(uint8_t *ref[4], int refStride[4], int w, int h,
00080                   enum PixelFormat srcFormat, enum PixelFormat dstFormat,
00081                   int srcW, int srcH, int dstW, int dstH, int flags,
00082                   struct Results *r)
00083 {
00084     static enum PixelFormat cur_srcFormat;
00085     static int cur_srcW, cur_srcH;
00086     static uint8_t *src[4];
00087     static int srcStride[4];
00088     uint8_t *dst[4] = { 0 };
00089     uint8_t *out[4] = { 0 };
00090     int dstStride[4] = {0};
00091     int i;
00092     uint64_t ssdY, ssdU = 0, ssdV = 0, ssdA = 0;
00093     struct SwsContext *dstContext = NULL, *outContext = NULL;
00094     uint32_t crc = 0;
00095     int res      = 0;
00096 
00097     if (cur_srcFormat != srcFormat || cur_srcW != srcW || cur_srcH != srcH) {
00098         struct SwsContext *srcContext = NULL;
00099         int p;
00100 
00101         for (p = 0; p < 4; p++)
00102             av_freep(&src[p]);
00103 
00104         av_image_fill_linesizes(srcStride, srcFormat, srcW);
00105         for (p = 0; p < 4; p++) {
00106             srcStride[p] = FFALIGN(srcStride[p], 16);
00107             if (srcStride[p])
00108                 src[p] = av_mallocz(srcStride[p] * srcH + 16);
00109             if (srcStride[p] && !src[p]) {
00110                 perror("Malloc");
00111                 res = -1;
00112                 goto end;
00113             }
00114         }
00115         srcContext = sws_getContext(w, h, PIX_FMT_YUVA420P, srcW, srcH,
00116                                     srcFormat, SWS_BILINEAR, NULL, NULL, NULL);
00117         if (!srcContext) {
00118             fprintf(stderr, "Failed to get %s ---> %s\n",
00119                     av_pix_fmt_descriptors[PIX_FMT_YUVA420P].name,
00120                     av_pix_fmt_descriptors[srcFormat].name);
00121             res = -1;
00122             goto end;
00123         }
00124         sws_scale(srcContext, ref, refStride, 0, h, src, srcStride);
00125         sws_freeContext(srcContext);
00126 
00127         cur_srcFormat = srcFormat;
00128         cur_srcW      = srcW;
00129         cur_srcH      = srcH;
00130     }
00131 
00132     av_image_fill_linesizes(dstStride, dstFormat, dstW);
00133     for (i = 0; i < 4; i++) {
00134         /* Image buffers passed into libswscale can be allocated any way you
00135          * prefer, as long as they're aligned enough for the architecture, and
00136          * they're freed appropriately (such as using av_free for buffers
00137          * allocated with av_malloc). */
00138         /* An extra 16 bytes is being allocated because some scalers may write
00139          * out of bounds. */
00140         dstStride[i] = FFALIGN(dstStride[i], 16);
00141         if (dstStride[i])
00142             dst[i] = av_mallocz(dstStride[i] * dstH + 16);
00143         if (dstStride[i] && !dst[i]) {
00144             perror("Malloc");
00145             res = -1;
00146 
00147             goto end;
00148         }
00149     }
00150 
00151     dstContext = sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat,
00152                                 flags, NULL, NULL, NULL);
00153     if (!dstContext) {
00154         fprintf(stderr, "Failed to get %s ---> %s\n",
00155                 av_pix_fmt_descriptors[srcFormat].name,
00156                 av_pix_fmt_descriptors[dstFormat].name);
00157         res = -1;
00158         goto end;
00159     }
00160 
00161     printf(" %s %dx%d -> %s %3dx%3d flags=%2d",
00162            av_pix_fmt_descriptors[srcFormat].name, srcW, srcH,
00163            av_pix_fmt_descriptors[dstFormat].name, dstW, dstH,
00164            flags);
00165     fflush(stdout);
00166 
00167     sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
00168 
00169     for (i = 0; i < 4 && dstStride[i]; i++)
00170         crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), crc, dst[i],
00171                      dstStride[i] * dstH);
00172 
00173     if (r && crc == r->crc) {
00174         ssdY = r->ssdY;
00175         ssdU = r->ssdU;
00176         ssdV = r->ssdV;
00177         ssdA = r->ssdA;
00178     } else {
00179         for (i = 0; i < 4; i++) {
00180             refStride[i] = FFALIGN(refStride[i], 16);
00181             if (refStride[i])
00182                 out[i] = av_mallocz(refStride[i] * h);
00183             if (refStride[i] && !out[i]) {
00184                 perror("Malloc");
00185                 res = -1;
00186                 goto end;
00187             }
00188         }
00189         outContext = sws_getContext(dstW, dstH, dstFormat, w, h,
00190                                     PIX_FMT_YUVA420P, SWS_BILINEAR,
00191                                     NULL, NULL, NULL);
00192         if (!outContext) {
00193             fprintf(stderr, "Failed to get %s ---> %s\n",
00194                     av_pix_fmt_descriptors[dstFormat].name,
00195                     av_pix_fmt_descriptors[PIX_FMT_YUVA420P].name);
00196             res = -1;
00197             goto end;
00198         }
00199         sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
00200 
00201         ssdY = getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
00202         if (hasChroma(srcFormat) && hasChroma(dstFormat)) {
00203             //FIXME check that output is really gray
00204             ssdU = getSSD(ref[1], out[1], refStride[1], refStride[1],
00205                           (w + 1) >> 1, (h + 1) >> 1);
00206             ssdV = getSSD(ref[2], out[2], refStride[2], refStride[2],
00207                           (w + 1) >> 1, (h + 1) >> 1);
00208         }
00209         if (isALPHA(srcFormat) && isALPHA(dstFormat))
00210             ssdA = getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);
00211 
00212         ssdY /= w * h;
00213         ssdU /= w * h / 4;
00214         ssdV /= w * h / 4;
00215         ssdA /= w * h;
00216 
00217         sws_freeContext(outContext);
00218 
00219         for (i = 0; i < 4; i++)
00220             if (refStride[i])
00221                 av_free(out[i]);
00222     }
00223 
00224     printf(" CRC=%08x SSD=%5"PRId64 ",%5"PRId64 ",%5"PRId64 ",%5"PRId64 "\n",
00225            crc, ssdY, ssdU, ssdV, ssdA);
00226 
00227 end:
00228     sws_freeContext(dstContext);
00229 
00230     for (i = 0; i < 4; i++)
00231         if (dstStride[i])
00232             av_free(dst[i]);
00233 
00234     return res;
00235 }
00236 
00237 static void selfTest(uint8_t *ref[4], int refStride[4], int w, int h,
00238                      enum PixelFormat srcFormat_in,
00239                      enum PixelFormat dstFormat_in)
00240 {
00241     const int flags[] = { SWS_FAST_BILINEAR, SWS_BILINEAR, SWS_BICUBIC,
00242                           SWS_X, SWS_POINT, SWS_AREA, 0 };
00243     const int srcW   = w;
00244     const int srcH   = h;
00245     const int dstW[] = { srcW - srcW / 3, srcW, srcW + srcW / 3, 0 };
00246     const int dstH[] = { srcH - srcH / 3, srcH, srcH + srcH / 3, 0 };
00247     enum PixelFormat srcFormat, dstFormat;
00248 
00249     for (srcFormat = srcFormat_in != PIX_FMT_NONE ? srcFormat_in : 0;
00250          srcFormat < PIX_FMT_NB; srcFormat++) {
00251         if (!sws_isSupportedInput(srcFormat) ||
00252             !sws_isSupportedOutput(srcFormat))
00253             continue;
00254 
00255         for (dstFormat = dstFormat_in != PIX_FMT_NONE ? dstFormat_in : 0;
00256              dstFormat < PIX_FMT_NB; dstFormat++) {
00257             int i, j, k;
00258             int res = 0;
00259 
00260             if (!sws_isSupportedInput(dstFormat) ||
00261                 !sws_isSupportedOutput(dstFormat))
00262                 continue;
00263 
00264             printf("%s -> %s\n",
00265                    av_pix_fmt_descriptors[srcFormat].name,
00266                    av_pix_fmt_descriptors[dstFormat].name);
00267             fflush(stdout);
00268 
00269             for (k = 0; flags[k] && !res; k++)
00270                 for (i = 0; dstW[i] && !res; i++)
00271                     for (j = 0; dstH[j] && !res; j++)
00272                         res = doTest(ref, refStride, w, h,
00273                                      srcFormat, dstFormat,
00274                                      srcW, srcH, dstW[i], dstH[j], flags[k],
00275                                      NULL);
00276             if (dstFormat_in != PIX_FMT_NONE)
00277                 break;
00278         }
00279         if (srcFormat_in != PIX_FMT_NONE)
00280             break;
00281     }
00282 }
00283 
00284 static int fileTest(uint8_t *ref[4], int refStride[4], int w, int h, FILE *fp,
00285                     enum PixelFormat srcFormat_in,
00286                     enum PixelFormat dstFormat_in)
00287 {
00288     char buf[256];
00289 
00290     while (fgets(buf, sizeof(buf), fp)) {
00291         struct Results r;
00292         enum PixelFormat srcFormat;
00293         char srcStr[12];
00294         int srcW, srcH;
00295         enum PixelFormat dstFormat;
00296         char dstStr[12];
00297         int dstW, dstH;
00298         int flags;
00299         int ret;
00300 
00301         ret = sscanf(buf,
00302                      " %12s %dx%d -> %12s %dx%d flags=%d CRC=%x"
00303                      " SSD=%"PRId64 ", %"PRId64 ", %"PRId64 ", %"PRId64 "\n",
00304                      srcStr, &srcW, &srcH, dstStr, &dstW, &dstH,
00305                      &flags, &r.crc, &r.ssdY, &r.ssdU, &r.ssdV, &r.ssdA);
00306         if (ret != 12) {
00307             srcStr[0] = dstStr[0] = 0;
00308             ret       = sscanf(buf, "%12s -> %12s\n", srcStr, dstStr);
00309         }
00310 
00311         srcFormat = av_get_pix_fmt(srcStr);
00312         dstFormat = av_get_pix_fmt(dstStr);
00313 
00314         if (srcFormat == PIX_FMT_NONE || dstFormat == PIX_FMT_NONE) {
00315             fprintf(stderr, "malformed input file\n");
00316             return -1;
00317         }
00318         if ((srcFormat_in != PIX_FMT_NONE && srcFormat_in != srcFormat) ||
00319             (dstFormat_in != PIX_FMT_NONE && dstFormat_in != dstFormat))
00320             continue;
00321         if (ret != 12) {
00322             printf("%s", buf);
00323             continue;
00324         }
00325 
00326         doTest(ref, refStride, w, h,
00327                srcFormat, dstFormat,
00328                srcW, srcH, dstW, dstH, flags,
00329                &r);
00330     }
00331 
00332     return 0;
00333 }
00334 
00335 #define W 96
00336 #define H 96
00337 
00338 int main(int argc, char **argv)
00339 {
00340     enum PixelFormat srcFormat = PIX_FMT_NONE;
00341     enum PixelFormat dstFormat = PIX_FMT_NONE;
00342     uint8_t *rgb_data   = av_malloc(W * H * 4);
00343     uint8_t *rgb_src[4] = { rgb_data, NULL, NULL, NULL };
00344     int rgb_stride[4]   = { 4 * W, 0, 0, 0 };
00345     uint8_t *data       = av_malloc(4 * W * H);
00346     uint8_t *src[4]     = { data, data + W * H, data + W * H * 2, data + W * H * 3 };
00347     int stride[4]       = { W, W, W, W };
00348     int x, y;
00349     struct SwsContext *sws;
00350     AVLFG rand;
00351     int res = -1;
00352     int i;
00353 
00354     if (!rgb_data || !data)
00355         return -1;
00356 
00357     sws = sws_getContext(W / 12, H / 12, PIX_FMT_RGB32, W, H,
00358                          PIX_FMT_YUVA420P, SWS_BILINEAR, NULL, NULL, NULL);
00359 
00360     av_lfg_init(&rand, 1);
00361 
00362     for (y = 0; y < H; y++)
00363         for (x = 0; x < W * 4; x++)
00364             rgb_data[ x + y * 4 * W] = av_lfg_get(&rand);
00365     sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
00366     sws_freeContext(sws);
00367     av_free(rgb_data);
00368 
00369     for (i = 1; i < argc; i += 2) {
00370         if (argv[i][0] != '-' || i + 1 == argc)
00371             goto bad_option;
00372         if (!strcmp(argv[i], "-ref")) {
00373             FILE *fp = fopen(argv[i + 1], "r");
00374             if (!fp) {
00375                 fprintf(stderr, "could not open '%s'\n", argv[i + 1]);
00376                 goto error;
00377             }
00378             res = fileTest(src, stride, W, H, fp, srcFormat, dstFormat);
00379             fclose(fp);
00380             goto end;
00381         } else if (!strcmp(argv[i], "-src")) {
00382             srcFormat = av_get_pix_fmt(argv[i + 1]);
00383             if (srcFormat == PIX_FMT_NONE) {
00384                 fprintf(stderr, "invalid pixel format %s\n", argv[i + 1]);
00385                 return -1;
00386             }
00387         } else if (!strcmp(argv[i], "-dst")) {
00388             dstFormat = av_get_pix_fmt(argv[i + 1]);
00389             if (dstFormat == PIX_FMT_NONE) {
00390                 fprintf(stderr, "invalid pixel format %s\n", argv[i + 1]);
00391                 return -1;
00392             }
00393         } else {
00394 bad_option:
00395             fprintf(stderr, "bad option or argument missing (%s)\n", argv[i]);
00396             goto error;
00397         }
00398     }
00399 
00400     selfTest(src, stride, W, H, srcFormat, dstFormat);
00401 end:
00402     res = 0;
00403 error:
00404     av_free(data);
00405 
00406     return res;
00407 }
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