Libav
swscale-test.c
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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 {
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,
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 {
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 };
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,
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 }