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swscale-test.c
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1 /*
2  * Copyright (C) 2003-2011 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/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(const uint8_t *src1, const 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] = {0};
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  srcStride[p] = FFALIGN(srcStride[p], 16);
110  if (srcStride[p])
111  src[p] = av_mallocz(srcStride[p] * srcH + 16);
112  if (srcStride[p] && !src[p]) {
113  perror("Malloc");
114  res = -1;
115  goto end;
116  }
117  }
118  srcContext = sws_getContext(w, h, AV_PIX_FMT_YUVA420P, srcW, srcH,
119  srcFormat, SWS_BILINEAR, NULL, NULL, NULL);
120  if (!srcContext) {
121  fprintf(stderr, "Failed to get %s ---> %s\n",
122  desc_yuva420p->name,
123  desc_src->name);
124  res = -1;
125  goto end;
126  }
127  sws_scale(srcContext, ref, refStride, 0, h, src, srcStride);
128  sws_freeContext(srcContext);
129 
130  cur_srcFormat = srcFormat;
131  cur_srcW = srcW;
132  cur_srcH = srcH;
133  }
134 
135  av_image_fill_linesizes(dstStride, dstFormat, dstW);
136  for (i = 0; i < 4; i++) {
137  /* Image buffers passed into libswscale can be allocated any way you
138  * prefer, as long as they're aligned enough for the architecture, and
139  * they're freed appropriately (such as using av_free for buffers
140  * allocated with av_malloc). */
141  /* An extra 16 bytes is being allocated because some scalers may write
142  * out of bounds. */
143  dstStride[i] = FFALIGN(dstStride[i], 16);
144  if (dstStride[i])
145  dst[i] = av_mallocz(dstStride[i] * dstH + 16);
146  if (dstStride[i] && !dst[i]) {
147  perror("Malloc");
148  res = -1;
149 
150  goto end;
151  }
152  }
153 
154  dstContext = sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat,
155  flags, NULL, NULL, NULL);
156  if (!dstContext) {
157  fprintf(stderr, "Failed to get %s ---> %s\n",
158  desc_src->name, desc_dst->name);
159  res = -1;
160  goto end;
161  }
162 
163  printf(" %s %dx%d -> %s %3dx%3d flags=%2d",
164  desc_src->name, srcW, srcH,
165  desc_dst->name, dstW, dstH,
166  flags);
167  fflush(stdout);
168 
169  sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
170 
171  for (i = 0; i < 4 && dstStride[i]; i++)
172  crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), crc, dst[i],
173  dstStride[i] * dstH);
174 
175  if (r && crc == r->crc) {
176  ssdY = r->ssdY;
177  ssdU = r->ssdU;
178  ssdV = r->ssdV;
179  ssdA = r->ssdA;
180  } else {
181  for (i = 0; i < 4; i++) {
182  refStride[i] = FFALIGN(refStride[i], 16);
183  if (refStride[i])
184  out[i] = av_mallocz(refStride[i] * h);
185  if (refStride[i] && !out[i]) {
186  perror("Malloc");
187  res = -1;
188  goto end;
189  }
190  }
191  outContext = sws_getContext(dstW, dstH, dstFormat, w, h,
193  NULL, NULL, NULL);
194  if (!outContext) {
195  fprintf(stderr, "Failed to get %s ---> %s\n",
196  desc_dst->name,
197  desc_yuva420p->name);
198  res = -1;
199  goto end;
200  }
201  sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
202 
203  ssdY = getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
204  if (hasChroma(srcFormat) && hasChroma(dstFormat)) {
205  //FIXME check that output is really gray
206  ssdU = getSSD(ref[1], out[1], refStride[1], refStride[1],
207  (w + 1) >> 1, (h + 1) >> 1);
208  ssdV = getSSD(ref[2], out[2], refStride[2], refStride[2],
209  (w + 1) >> 1, (h + 1) >> 1);
210  }
211  if (isALPHA(srcFormat) && isALPHA(dstFormat))
212  ssdA = getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);
213 
214  ssdY /= w * h;
215  ssdU /= w * h / 4;
216  ssdV /= w * h / 4;
217  ssdA /= w * h;
218 
219  sws_freeContext(outContext);
220 
221  for (i = 0; i < 4; i++)
222  if (refStride[i])
223  av_free(out[i]);
224  }
225 
226  printf(" CRC=%08x SSD=%5"PRId64 ",%5"PRId64 ",%5"PRId64 ",%5"PRId64 "\n",
227  crc, ssdY, ssdU, ssdV, ssdA);
228 
229 end:
230  sws_freeContext(dstContext);
231 
232  for (i = 0; i < 4; i++)
233  if (dstStride[i])
234  av_free(dst[i]);
235 
236  return res;
237 }
238 
239 static void selfTest(uint8_t *ref[4], int refStride[4], int w, int h,
240  enum AVPixelFormat srcFormat_in,
241  enum AVPixelFormat dstFormat_in)
242 {
244  SWS_X, SWS_POINT, SWS_AREA, 0 };
245  const int srcW = w;
246  const int srcH = h;
247  const int dstW[] = { srcW - srcW / 3, srcW, srcW + srcW / 3, 0 };
248  const int dstH[] = { srcH - srcH / 3, srcH, srcH + srcH / 3, 0 };
250  const AVPixFmtDescriptor *desc_src, *desc_dst;
251 
252  for (srcFormat = srcFormat_in != AV_PIX_FMT_NONE ? srcFormat_in : 0;
253  srcFormat < AV_PIX_FMT_NB; srcFormat++) {
254  if (!sws_isSupportedInput(srcFormat) ||
255  !sws_isSupportedOutput(srcFormat))
256  continue;
257 
258  desc_src = av_pix_fmt_desc_get(srcFormat);
259 
260  for (dstFormat = dstFormat_in != AV_PIX_FMT_NONE ? dstFormat_in : 0;
261  dstFormat < AV_PIX_FMT_NB; dstFormat++) {
262  int i, j, k;
263  int res = 0;
264 
265  if (!sws_isSupportedInput(dstFormat) ||
266  !sws_isSupportedOutput(dstFormat))
267  continue;
268 
269  desc_dst = av_pix_fmt_desc_get(dstFormat);
270 
271  printf("%s -> %s\n", desc_src->name, desc_dst->name);
272  fflush(stdout);
273 
274  for (k = 0; flags[k] && !res; k++)
275  for (i = 0; dstW[i] && !res; i++)
276  for (j = 0; dstH[j] && !res; j++)
277  res = doTest(ref, refStride, w, h,
278  srcFormat, dstFormat,
279  srcW, srcH, dstW[i], dstH[j], flags[k],
280  NULL);
281  if (dstFormat_in != AV_PIX_FMT_NONE)
282  break;
283  }
284  if (srcFormat_in != AV_PIX_FMT_NONE)
285  break;
286  }
287 }
288 
289 static int fileTest(uint8_t *ref[4], int refStride[4], int w, int h, FILE *fp,
290  enum AVPixelFormat srcFormat_in,
291  enum AVPixelFormat dstFormat_in)
292 {
293  char buf[256];
294 
295  while (fgets(buf, sizeof(buf), fp)) {
296  struct Results r;
297  enum AVPixelFormat srcFormat;
298  char srcStr[12];
299  int srcW, srcH;
300  enum AVPixelFormat dstFormat;
301  char dstStr[12];
302  int dstW, dstH;
303  int flags;
304  int ret;
305 
306  ret = sscanf(buf,
307  " %12s %dx%d -> %12s %dx%d flags=%d CRC=%x"
308  " SSD=%"PRId64 ", %"PRId64 ", %"PRId64 ", %"PRId64 "\n",
309  srcStr, &srcW, &srcH, dstStr, &dstW, &dstH,
310  &flags, &r.crc, &r.ssdY, &r.ssdU, &r.ssdV, &r.ssdA);
311  if (ret != 12) {
312  srcStr[0] = dstStr[0] = 0;
313  ret = sscanf(buf, "%12s -> %12s\n", srcStr, dstStr);
314  }
315 
316  srcFormat = av_get_pix_fmt(srcStr);
317  dstFormat = av_get_pix_fmt(dstStr);
318 
319  if (srcFormat == AV_PIX_FMT_NONE || dstFormat == AV_PIX_FMT_NONE ||
320  srcW > 8192U || srcH > 8192U || dstW > 8192U || dstH > 8192U) {
321  fprintf(stderr, "malformed input file\n");
322  return -1;
323  }
324  if ((srcFormat_in != AV_PIX_FMT_NONE && srcFormat_in != srcFormat) ||
325  (dstFormat_in != AV_PIX_FMT_NONE && dstFormat_in != dstFormat))
326  continue;
327  if (ret != 12) {
328  printf("%s", buf);
329  continue;
330  }
331 
332  doTest(ref, refStride, w, h,
333  srcFormat, dstFormat,
334  srcW, srcH, dstW, dstH, flags,
335  &r);
336  }
337 
338  return 0;
339 }
340 
341 #define W 96
342 #define H 96
343 
344 int main(int argc, char **argv)
345 {
346  enum AVPixelFormat srcFormat = AV_PIX_FMT_NONE;
347  enum AVPixelFormat dstFormat = AV_PIX_FMT_NONE;
348  uint8_t *rgb_data = av_malloc(W * H * 4);
349  const uint8_t * const rgb_src[4] = { rgb_data, NULL, NULL, NULL };
350  int rgb_stride[4] = { 4 * W, 0, 0, 0 };
351  uint8_t *data = av_malloc(4 * W * H);
352  uint8_t *src[4] = { data, data + W * H, data + W * H * 2, data + W * H * 3 };
353  int stride[4] = { W, W, W, W };
354  int x, y;
355  struct SwsContext *sws;
356  AVLFG rand;
357  int res = -1;
358  int i;
359  FILE *fp = NULL;
360 
361  if (!rgb_data || !data)
362  return -1;
363 
364  for (i = 1; i < argc; i += 2) {
365  if (argv[i][0] != '-' || i + 1 == argc)
366  goto bad_option;
367  if (!strcmp(argv[i], "-ref")) {
368  fp = fopen(argv[i + 1], "r");
369  if (!fp) {
370  fprintf(stderr, "could not open '%s'\n", argv[i + 1]);
371  goto error;
372  }
373  } else if (!strcmp(argv[i], "-src")) {
374  srcFormat = av_get_pix_fmt(argv[i + 1]);
375  if (srcFormat == AV_PIX_FMT_NONE) {
376  fprintf(stderr, "invalid pixel format %s\n", argv[i + 1]);
377  return -1;
378  }
379  } else if (!strcmp(argv[i], "-dst")) {
380  dstFormat = av_get_pix_fmt(argv[i + 1]);
381  if (dstFormat == AV_PIX_FMT_NONE) {
382  fprintf(stderr, "invalid pixel format %s\n", argv[i + 1]);
383  return -1;
384  }
385  } else {
386 bad_option:
387  fprintf(stderr, "bad option or argument missing (%s)\n", argv[i]);
388  goto error;
389  }
390  }
391 
392  sws = sws_getContext(W / 12, H / 12, AV_PIX_FMT_RGB32, W, H,
394 
395  av_lfg_init(&rand, 1);
396 
397  for (y = 0; y < H; y++)
398  for (x = 0; x < W * 4; x++)
399  rgb_data[ x + y * 4 * W] = av_lfg_get(&rand);
400  sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
401  sws_freeContext(sws);
402  av_free(rgb_data);
403 
404  if(fp) {
405  res = fileTest(src, stride, W, H, fp, srcFormat, dstFormat);
406  fclose(fp);
407  } else {
408  selfTest(src, stride, W, H, srcFormat, dstFormat);
409  res = 0;
410  }
411 error:
412  av_free(data);
413 
414  return res;
415 }