Libav
parseutils.c
Go to the documentation of this file.
1 /*
2  * This file is part of Libav.
3  *
4  * Libav is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * Libav is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with Libav; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
24 #include <time.h>
25 
26 #include "avstring.h"
27 #include "avutil.h"
28 #include "common.h"
29 #include "eval.h"
30 #include "log.h"
31 #include "random_seed.h"
32 #include "time_internal.h"
33 #include "parseutils.h"
34 
35 typedef struct VideoSizeAbbr {
36  const char *abbr;
37  int width, height;
39 
40 typedef struct VideoRateAbbr {
41  const char *abbr;
44 
45 static const VideoSizeAbbr video_size_abbrs[] = {
46  { "ntsc", 720, 480 },
47  { "pal", 720, 576 },
48  { "qntsc", 352, 240 }, /* VCD compliant NTSC */
49  { "qpal", 352, 288 }, /* VCD compliant PAL */
50  { "sntsc", 640, 480 }, /* square pixel NTSC */
51  { "spal", 768, 576 }, /* square pixel PAL */
52  { "film", 352, 240 },
53  { "ntsc-film", 352, 240 },
54  { "sqcif", 128, 96 },
55  { "qcif", 176, 144 },
56  { "cif", 352, 288 },
57  { "4cif", 704, 576 },
58  { "16cif", 1408,1152 },
59  { "qqvga", 160, 120 },
60  { "qvga", 320, 240 },
61  { "vga", 640, 480 },
62  { "svga", 800, 600 },
63  { "xga", 1024, 768 },
64  { "uxga", 1600,1200 },
65  { "qxga", 2048,1536 },
66  { "sxga", 1280,1024 },
67  { "qsxga", 2560,2048 },
68  { "hsxga", 5120,4096 },
69  { "wvga", 852, 480 },
70  { "wxga", 1366, 768 },
71  { "wsxga", 1600,1024 },
72  { "wuxga", 1920,1200 },
73  { "woxga", 2560,1600 },
74  { "wqsxga", 3200,2048 },
75  { "wquxga", 3840,2400 },
76  { "whsxga", 6400,4096 },
77  { "whuxga", 7680,4800 },
78  { "cga", 320, 200 },
79  { "ega", 640, 350 },
80  { "hd480", 852, 480 },
81  { "hd720", 1280, 720 },
82  { "hd1080", 1920,1080 },
83  { "2kdci", 2048,1080 },
84  { "4kdci", 4096,2160 },
85  { "uhd2160", 3840,2160 },
86  { "uhd4320", 7680,4320 },
87 };
88 
90  { "ntsc", { 30000, 1001 } },
91  { "pal", { 25, 1 } },
92  { "qntsc", { 30000, 1001 } }, /* VCD compliant NTSC */
93  { "qpal", { 25, 1 } }, /* VCD compliant PAL */
94  { "sntsc", { 30000, 1001 } }, /* square pixel NTSC */
95  { "spal", { 25, 1 } }, /* square pixel PAL */
96  { "film", { 24, 1 } },
97  { "ntsc-film", { 24000, 1001 } },
98 };
99 
100 int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
101 {
102  int i;
103  int n = FF_ARRAY_ELEMS(video_size_abbrs);
104  char *p;
105  int width = 0, height = 0;
106 
107  for (i = 0; i < n; i++) {
108  if (!strcmp(video_size_abbrs[i].abbr, str)) {
109  width = video_size_abbrs[i].width;
110  height = video_size_abbrs[i].height;
111  break;
112  }
113  }
114  if (i == n) {
115  width = strtol(str, &p, 10);
116  if (*p)
117  p++;
118  height = strtol(p, &p, 10);
119  }
120  if (width <= 0 || height <= 0)
121  return AVERROR(EINVAL);
122  *width_ptr = width;
123  *height_ptr = height;
124  return 0;
125 }
126 
127 int av_parse_video_rate(AVRational *rate, const char *arg)
128 {
129  int i, ret;
130  int n = FF_ARRAY_ELEMS(video_rate_abbrs);
131  double res;
132 
133  /* First, we check our abbreviation table */
134  for (i = 0; i < n; ++i)
135  if (!strcmp(video_rate_abbrs[i].abbr, arg)) {
136  *rate = video_rate_abbrs[i].rate;
137  return 0;
138  }
139 
140  /* Then, we try to parse it as fraction */
141  if ((ret = av_expr_parse_and_eval(&res, arg, NULL, NULL, NULL, NULL, NULL, NULL,
142  NULL, 0, NULL)) < 0)
143  return ret;
144  *rate = av_d2q(res, 1001000);
145  if (rate->num <= 0 || rate->den <= 0)
146  return AVERROR(EINVAL);
147  return 0;
148 }
149 
150 typedef struct ColorEntry {
151  const char *name;
152  uint8_t rgb_color[3];
153 } ColorEntry;
154 
156  { "AliceBlue", { 0xF0, 0xF8, 0xFF } },
157  { "AntiqueWhite", { 0xFA, 0xEB, 0xD7 } },
158  { "Aqua", { 0x00, 0xFF, 0xFF } },
159  { "Aquamarine", { 0x7F, 0xFF, 0xD4 } },
160  { "Azure", { 0xF0, 0xFF, 0xFF } },
161  { "Beige", { 0xF5, 0xF5, 0xDC } },
162  { "Bisque", { 0xFF, 0xE4, 0xC4 } },
163  { "Black", { 0x00, 0x00, 0x00 } },
164  { "BlanchedAlmond", { 0xFF, 0xEB, 0xCD } },
165  { "Blue", { 0x00, 0x00, 0xFF } },
166  { "BlueViolet", { 0x8A, 0x2B, 0xE2 } },
167  { "Brown", { 0xA5, 0x2A, 0x2A } },
168  { "BurlyWood", { 0xDE, 0xB8, 0x87 } },
169  { "CadetBlue", { 0x5F, 0x9E, 0xA0 } },
170  { "Chartreuse", { 0x7F, 0xFF, 0x00 } },
171  { "Chocolate", { 0xD2, 0x69, 0x1E } },
172  { "Coral", { 0xFF, 0x7F, 0x50 } },
173  { "CornflowerBlue", { 0x64, 0x95, 0xED } },
174  { "Cornsilk", { 0xFF, 0xF8, 0xDC } },
175  { "Crimson", { 0xDC, 0x14, 0x3C } },
176  { "Cyan", { 0x00, 0xFF, 0xFF } },
177  { "DarkBlue", { 0x00, 0x00, 0x8B } },
178  { "DarkCyan", { 0x00, 0x8B, 0x8B } },
179  { "DarkGoldenRod", { 0xB8, 0x86, 0x0B } },
180  { "DarkGray", { 0xA9, 0xA9, 0xA9 } },
181  { "DarkGreen", { 0x00, 0x64, 0x00 } },
182  { "DarkKhaki", { 0xBD, 0xB7, 0x6B } },
183  { "DarkMagenta", { 0x8B, 0x00, 0x8B } },
184  { "DarkOliveGreen", { 0x55, 0x6B, 0x2F } },
185  { "Darkorange", { 0xFF, 0x8C, 0x00 } },
186  { "DarkOrchid", { 0x99, 0x32, 0xCC } },
187  { "DarkRed", { 0x8B, 0x00, 0x00 } },
188  { "DarkSalmon", { 0xE9, 0x96, 0x7A } },
189  { "DarkSeaGreen", { 0x8F, 0xBC, 0x8F } },
190  { "DarkSlateBlue", { 0x48, 0x3D, 0x8B } },
191  { "DarkSlateGray", { 0x2F, 0x4F, 0x4F } },
192  { "DarkTurquoise", { 0x00, 0xCE, 0xD1 } },
193  { "DarkViolet", { 0x94, 0x00, 0xD3 } },
194  { "DeepPink", { 0xFF, 0x14, 0x93 } },
195  { "DeepSkyBlue", { 0x00, 0xBF, 0xFF } },
196  { "DimGray", { 0x69, 0x69, 0x69 } },
197  { "DodgerBlue", { 0x1E, 0x90, 0xFF } },
198  { "FireBrick", { 0xB2, 0x22, 0x22 } },
199  { "FloralWhite", { 0xFF, 0xFA, 0xF0 } },
200  { "ForestGreen", { 0x22, 0x8B, 0x22 } },
201  { "Fuchsia", { 0xFF, 0x00, 0xFF } },
202  { "Gainsboro", { 0xDC, 0xDC, 0xDC } },
203  { "GhostWhite", { 0xF8, 0xF8, 0xFF } },
204  { "Gold", { 0xFF, 0xD7, 0x00 } },
205  { "GoldenRod", { 0xDA, 0xA5, 0x20 } },
206  { "Gray", { 0x80, 0x80, 0x80 } },
207  { "Green", { 0x00, 0x80, 0x00 } },
208  { "GreenYellow", { 0xAD, 0xFF, 0x2F } },
209  { "HoneyDew", { 0xF0, 0xFF, 0xF0 } },
210  { "HotPink", { 0xFF, 0x69, 0xB4 } },
211  { "IndianRed", { 0xCD, 0x5C, 0x5C } },
212  { "Indigo", { 0x4B, 0x00, 0x82 } },
213  { "Ivory", { 0xFF, 0xFF, 0xF0 } },
214  { "Khaki", { 0xF0, 0xE6, 0x8C } },
215  { "Lavender", { 0xE6, 0xE6, 0xFA } },
216  { "LavenderBlush", { 0xFF, 0xF0, 0xF5 } },
217  { "LawnGreen", { 0x7C, 0xFC, 0x00 } },
218  { "LemonChiffon", { 0xFF, 0xFA, 0xCD } },
219  { "LightBlue", { 0xAD, 0xD8, 0xE6 } },
220  { "LightCoral", { 0xF0, 0x80, 0x80 } },
221  { "LightCyan", { 0xE0, 0xFF, 0xFF } },
222  { "LightGoldenRodYellow", { 0xFA, 0xFA, 0xD2 } },
223  { "LightGrey", { 0xD3, 0xD3, 0xD3 } },
224  { "LightGreen", { 0x90, 0xEE, 0x90 } },
225  { "LightPink", { 0xFF, 0xB6, 0xC1 } },
226  { "LightSalmon", { 0xFF, 0xA0, 0x7A } },
227  { "LightSeaGreen", { 0x20, 0xB2, 0xAA } },
228  { "LightSkyBlue", { 0x87, 0xCE, 0xFA } },
229  { "LightSlateGray", { 0x77, 0x88, 0x99 } },
230  { "LightSteelBlue", { 0xB0, 0xC4, 0xDE } },
231  { "LightYellow", { 0xFF, 0xFF, 0xE0 } },
232  { "Lime", { 0x00, 0xFF, 0x00 } },
233  { "LimeGreen", { 0x32, 0xCD, 0x32 } },
234  { "Linen", { 0xFA, 0xF0, 0xE6 } },
235  { "Magenta", { 0xFF, 0x00, 0xFF } },
236  { "Maroon", { 0x80, 0x00, 0x00 } },
237  { "MediumAquaMarine", { 0x66, 0xCD, 0xAA } },
238  { "MediumBlue", { 0x00, 0x00, 0xCD } },
239  { "MediumOrchid", { 0xBA, 0x55, 0xD3 } },
240  { "MediumPurple", { 0x93, 0x70, 0xD8 } },
241  { "MediumSeaGreen", { 0x3C, 0xB3, 0x71 } },
242  { "MediumSlateBlue", { 0x7B, 0x68, 0xEE } },
243  { "MediumSpringGreen", { 0x00, 0xFA, 0x9A } },
244  { "MediumTurquoise", { 0x48, 0xD1, 0xCC } },
245  { "MediumVioletRed", { 0xC7, 0x15, 0x85 } },
246  { "MidnightBlue", { 0x19, 0x19, 0x70 } },
247  { "MintCream", { 0xF5, 0xFF, 0xFA } },
248  { "MistyRose", { 0xFF, 0xE4, 0xE1 } },
249  { "Moccasin", { 0xFF, 0xE4, 0xB5 } },
250  { "NavajoWhite", { 0xFF, 0xDE, 0xAD } },
251  { "Navy", { 0x00, 0x00, 0x80 } },
252  { "OldLace", { 0xFD, 0xF5, 0xE6 } },
253  { "Olive", { 0x80, 0x80, 0x00 } },
254  { "OliveDrab", { 0x6B, 0x8E, 0x23 } },
255  { "Orange", { 0xFF, 0xA5, 0x00 } },
256  { "OrangeRed", { 0xFF, 0x45, 0x00 } },
257  { "Orchid", { 0xDA, 0x70, 0xD6 } },
258  { "PaleGoldenRod", { 0xEE, 0xE8, 0xAA } },
259  { "PaleGreen", { 0x98, 0xFB, 0x98 } },
260  { "PaleTurquoise", { 0xAF, 0xEE, 0xEE } },
261  { "PaleVioletRed", { 0xD8, 0x70, 0x93 } },
262  { "PapayaWhip", { 0xFF, 0xEF, 0xD5 } },
263  { "PeachPuff", { 0xFF, 0xDA, 0xB9 } },
264  { "Peru", { 0xCD, 0x85, 0x3F } },
265  { "Pink", { 0xFF, 0xC0, 0xCB } },
266  { "Plum", { 0xDD, 0xA0, 0xDD } },
267  { "PowderBlue", { 0xB0, 0xE0, 0xE6 } },
268  { "Purple", { 0x80, 0x00, 0x80 } },
269  { "Red", { 0xFF, 0x00, 0x00 } },
270  { "RosyBrown", { 0xBC, 0x8F, 0x8F } },
271  { "RoyalBlue", { 0x41, 0x69, 0xE1 } },
272  { "SaddleBrown", { 0x8B, 0x45, 0x13 } },
273  { "Salmon", { 0xFA, 0x80, 0x72 } },
274  { "SandyBrown", { 0xF4, 0xA4, 0x60 } },
275  { "SeaGreen", { 0x2E, 0x8B, 0x57 } },
276  { "SeaShell", { 0xFF, 0xF5, 0xEE } },
277  { "Sienna", { 0xA0, 0x52, 0x2D } },
278  { "Silver", { 0xC0, 0xC0, 0xC0 } },
279  { "SkyBlue", { 0x87, 0xCE, 0xEB } },
280  { "SlateBlue", { 0x6A, 0x5A, 0xCD } },
281  { "SlateGray", { 0x70, 0x80, 0x90 } },
282  { "Snow", { 0xFF, 0xFA, 0xFA } },
283  { "SpringGreen", { 0x00, 0xFF, 0x7F } },
284  { "SteelBlue", { 0x46, 0x82, 0xB4 } },
285  { "Tan", { 0xD2, 0xB4, 0x8C } },
286  { "Teal", { 0x00, 0x80, 0x80 } },
287  { "Thistle", { 0xD8, 0xBF, 0xD8 } },
288  { "Tomato", { 0xFF, 0x63, 0x47 } },
289  { "Turquoise", { 0x40, 0xE0, 0xD0 } },
290  { "Violet", { 0xEE, 0x82, 0xEE } },
291  { "Wheat", { 0xF5, 0xDE, 0xB3 } },
292  { "White", { 0xFF, 0xFF, 0xFF } },
293  { "WhiteSmoke", { 0xF5, 0xF5, 0xF5 } },
294  { "Yellow", { 0xFF, 0xFF, 0x00 } },
295  { "YellowGreen", { 0x9A, 0xCD, 0x32 } },
296 };
297 
298 static int color_table_compare(const void *lhs, const void *rhs)
299 {
300  return av_strcasecmp(lhs, ((const ColorEntry *)rhs)->name);
301 }
302 
303 #define ALPHA_SEP '@'
304 
305 int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
306  void *log_ctx)
307 {
308  char *tail, color_string2[128];
309  const ColorEntry *entry;
310  int len, hex_offset = 0;
311 
312  if (color_string[0] == '#') {
313  hex_offset = 1;
314  } else if (!strncmp(color_string, "0x", 2))
315  hex_offset = 2;
316 
317  if (slen < 0)
318  slen = strlen(color_string);
319  av_strlcpy(color_string2, color_string + hex_offset,
320  FFMIN(slen-hex_offset+1, sizeof(color_string2)));
321  if ((tail = strchr(color_string2, ALPHA_SEP)))
322  *tail++ = 0;
323  len = strlen(color_string2);
324  rgba_color[3] = 255;
325 
326  if (!av_strcasecmp(color_string2, "random") || !av_strcasecmp(color_string2, "bikeshed")) {
327  int rgba = av_get_random_seed();
328  rgba_color[0] = rgba >> 24;
329  rgba_color[1] = rgba >> 16;
330  rgba_color[2] = rgba >> 8;
331  rgba_color[3] = rgba;
332  } else if (hex_offset ||
333  strspn(color_string2, "0123456789ABCDEFabcdef") == len) {
334  char *tail;
335  unsigned int rgba = strtoul(color_string2, &tail, 16);
336 
337  if (*tail || (len != 6 && len != 8)) {
338  av_log(log_ctx, AV_LOG_ERROR, "Invalid 0xRRGGBB[AA] color string: '%s'\n", color_string2);
339  return AVERROR(EINVAL);
340  }
341  if (len == 8) {
342  rgba_color[3] = rgba;
343  rgba >>= 8;
344  }
345  rgba_color[0] = rgba >> 16;
346  rgba_color[1] = rgba >> 8;
347  rgba_color[2] = rgba;
348  } else {
349  entry = bsearch(color_string2,
350  color_table,
351  FF_ARRAY_ELEMS(color_table),
352  sizeof(ColorEntry),
354  if (!entry) {
355  av_log(log_ctx, AV_LOG_ERROR, "Cannot find color '%s'\n", color_string2);
356  return AVERROR(EINVAL);
357  }
358  memcpy(rgba_color, entry->rgb_color, 3);
359  }
360 
361  if (tail) {
362  double alpha;
363  const char *alpha_string = tail;
364  if (!strncmp(alpha_string, "0x", 2)) {
365  alpha = strtoul(alpha_string, &tail, 16);
366  } else {
367  alpha = 255 * strtod(alpha_string, &tail);
368  }
369 
370  if (tail == alpha_string || *tail || alpha > 255 || alpha < 0) {
371  av_log(log_ctx, AV_LOG_ERROR, "Invalid alpha value specifier '%s' in '%s'\n",
372  alpha_string, color_string);
373  return AVERROR(EINVAL);
374  }
375  rgba_color[3] = alpha;
376  }
377 
378  return 0;
379 }
380 
381 /* get a positive number between n_min and n_max, for a maximum length
382  of len_max. Return -1 if error. */
383 static int date_get_num(const char **pp,
384  int n_min, int n_max, int len_max)
385 {
386  int i, val, c;
387  const char *p;
388 
389  p = *pp;
390  val = 0;
391  for(i = 0; i < len_max; i++) {
392  c = *p;
393  if (!av_isdigit(c))
394  break;
395  val = (val * 10) + c - '0';
396  p++;
397  }
398  /* no number read ? */
399  if (p == *pp)
400  return -1;
401  if (val < n_min || val > n_max)
402  return -1;
403  *pp = p;
404  return val;
405 }
406 
407 const char *av_small_strptime(const char *p, const char *fmt, struct tm *dt)
408 {
409  int c, val;
410 
411  while((c = *fmt++)) {
412  if (c != '%') {
413  if (av_isspace(c))
414  for (; *p && av_isspace(*p); p++);
415  else if (*p != c)
416  return NULL;
417  else p++;
418  continue;
419  }
420 
421  c = *fmt++;
422  switch(c) {
423  case 'H':
424  val = date_get_num(&p, 0, 23, 2);
425  if (val == -1)
426  return NULL;
427  dt->tm_hour = val;
428  break;
429  case 'M':
430  val = date_get_num(&p, 0, 59, 2);
431  if (val == -1)
432  return NULL;
433  dt->tm_min = val;
434  break;
435  case 'S':
436  val = date_get_num(&p, 0, 59, 2);
437  if (val == -1)
438  return NULL;
439  dt->tm_sec = val;
440  break;
441  case 'Y':
442  val = date_get_num(&p, 0, 9999, 4);
443  if (val == -1)
444  return NULL;
445  dt->tm_year = val - 1900;
446  break;
447  case 'm':
448  val = date_get_num(&p, 1, 12, 2);
449  if (val == -1)
450  return NULL;
451  dt->tm_mon = val - 1;
452  break;
453  case 'd':
454  val = date_get_num(&p, 1, 31, 2);
455  if (val == -1)
456  return NULL;
457  dt->tm_mday = val;
458  break;
459  case 'T':
460  p = av_small_strptime(p, "%H:%M:%S", dt);
461  if (!p)
462  return NULL;
463  break;
464  case '%':
465  if (*p++ != '%')
466  return NULL;
467  break;
468  default:
469  return NULL;
470  }
471  }
472 
473  return p;
474 }
475 
476 time_t av_timegm(struct tm *tm)
477 {
478  time_t t;
479 
480  int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
481 
482  if (m < 3) {
483  m += 12;
484  y--;
485  }
486 
487  t = 86400 *
488  (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + y / 400 - 719469);
489 
490  t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
491 
492  return t;
493 }
494 
495 int av_parse_time(int64_t *timeval, const char *timestr, int duration)
496 {
497  const char *p;
498  int64_t t;
499  struct tm dt = { 0 }, tmbuf;
500  int i;
501  static const char * const date_fmt[] = {
502  "%Y-%m-%d",
503  "%Y%m%d",
504  };
505  static const char * const time_fmt[] = {
506  "%H:%M:%S",
507  "%H%M%S",
508  };
509  const char *q;
510  int is_utc, len;
511  char lastch;
512  int negative = 0;
513 
514  time_t now = time(0);
515 
516  len = strlen(timestr);
517  if (len > 0)
518  lastch = timestr[len - 1];
519  else
520  lastch = '\0';
521  is_utc = (lastch == 'z' || lastch == 'Z');
522 
523  p = timestr;
524  q = NULL;
525  if (!duration) {
526  if (!av_strncasecmp(timestr, "now", len)) {
527  *timeval = (int64_t) now * 1000000;
528  return 0;
529  }
530 
531  /* parse the year-month-day part */
532  for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) {
533  q = av_small_strptime(p, date_fmt[i], &dt);
534  if (q) {
535  break;
536  }
537  }
538 
539  /* if the year-month-day part is missing, then take the
540  * current year-month-day time */
541  if (!q) {
542  if (is_utc) {
543  dt = *gmtime_r(&now, &tmbuf);
544  } else {
545  dt = *localtime_r(&now, &tmbuf);
546  }
547  dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
548  } else {
549  p = q;
550  }
551 
552  if (*p == 'T' || *p == 't' || *p == ' ')
553  p++;
554 
555  /* parse the hour-minute-second part */
556  for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) {
557  q = av_small_strptime(p, time_fmt[i], &dt);
558  if (q) {
559  break;
560  }
561  }
562  } else {
563  /* parse timestr as a duration */
564  if (p[0] == '-') {
565  negative = 1;
566  ++p;
567  }
568  /* parse timestr as HH:MM:SS */
569  q = av_small_strptime(p, time_fmt[0], &dt);
570  if (!q) {
571  char *o;
572  /* parse timestr as S+ */
573  dt.tm_sec = strtol(p, &o, 10);
574  if (o == p) {
575  /* the parsing didn't succeed */
576  *timeval = INT64_MIN;
577  return AVERROR(EINVAL);
578  }
579  dt.tm_min = 0;
580  dt.tm_hour = 0;
581  q = o;
582  }
583  }
584 
585  /* Now we have all the fields that we can get */
586  if (!q) {
587  *timeval = INT64_MIN;
588  return AVERROR(EINVAL);
589  }
590 
591  if (duration) {
592  t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
593  } else {
594  dt.tm_isdst = -1; /* unknown */
595  if (is_utc) {
596  t = av_timegm(&dt);
597  } else {
598  t = mktime(&dt);
599  }
600  }
601 
602  t *= 1000000;
603 
604  /* parse the .m... part */
605  if (*q == '.') {
606  int val, n;
607  q++;
608  for (val = 0, n = 100000; n >= 1; n /= 10, q++) {
609  if (!av_isdigit(*q))
610  break;
611  val += n * (*q - '0');
612  }
613  t += val;
614  }
615  *timeval = negative ? -t : t;
616  return 0;
617 }
618 
619 int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
620 {
621  const char *p;
622  char tag[128], *q;
623 
624  p = info;
625  if (*p == '?')
626  p++;
627  for(;;) {
628  q = tag;
629  while (*p != '\0' && *p != '=' && *p != '&') {
630  if ((q - tag) < sizeof(tag) - 1)
631  *q++ = *p;
632  p++;
633  }
634  *q = '\0';
635  q = arg;
636  if (*p == '=') {
637  p++;
638  while (*p != '&' && *p != '\0') {
639  if ((q - arg) < arg_size - 1) {
640  if (*p == '+')
641  *q++ = ' ';
642  else
643  *q++ = *p;
644  }
645  p++;
646  }
647  }
648  *q = '\0';
649  if (!strcmp(tag, tag1))
650  return 1;
651  if (*p != '&')
652  break;
653  p++;
654  }
655  return 0;
656 }
time_t av_timegm(struct tm *tm)
Convert the decomposed UTC time in tm to a time_t value.
Definition: parseutils.c:476
const char * name
a string representing the name of the color
Definition: parseutils.c:151
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.h:157
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
Definition: parseutils.c:127
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
Parse str and put in width_ptr and height_ptr the detected values.
Definition: parseutils.c:100
const char * abbr
Definition: parseutils.c:36
static ColorEntry color_table[]
Definition: parseutils.c:155
int av_parse_time(int64_t *timeval, const char *timestr, int duration)
Parse timestr and return in *time a corresponding number of microseconds.
Definition: parseutils.c:495
const char * abbr
Definition: parseutils.c:41
#define ALPHA_SEP
Definition: parseutils.c:303
int num
numerator
Definition: rational.h:44
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
static av_const int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.h:173
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:166
external API header
#define FF_ARRAY_ELEMS(a)
uint8_t
AVRational rate
Definition: parseutils.c:42
int64_t duration
Definition: movenc.c:63
double strtod(const char *, char **)
uint32_t tag
Definition: movenc.c:854
int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
Attempt to find a specific tag in a URL.
Definition: parseutils.c:619
uint8_t rgb_color[3]
RGB values for the color.
Definition: parseutils.c:152
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx)
Put the RGBA values that correspond to color_string in rgba_color.
Definition: parseutils.c:305
int av_expr_parse_and_eval(double *d, const char *s, const char *const *const_names, const double *const_values, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), void *opaque, int log_offset, void *log_ctx)
Parse and evaluate an expression.
Definition: eval.c:551
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
#define AVERROR(e)
Definition: error.h:43
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:81
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
const char * name
Definition: qsvenc.c:44
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:105
#define FFMIN(a, b)
Definition: common.h:66
int av_strcasecmp(const char *a, const char *b)
Definition: avstring.c:156
static struct tm * localtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:37
const char * av_small_strptime(const char *p, const char *fmt, struct tm *dt)
Simplified version of strptime.
Definition: parseutils.c:407
static int color_table_compare(const void *lhs, const void *rhs)
Definition: parseutils.c:298
NULL
Definition: eval.c:55
static const VideoRateAbbr video_rate_abbrs[]
Definition: parseutils.c:89
static int date_get_num(const char **pp, int n_min, int n_max, int len_max)
Definition: parseutils.c:383
rational number numerator/denominator
Definition: rational.h:43
misc parsing utilities
static const VideoSizeAbbr video_size_abbrs[]
Definition: parseutils.c:45
common internal and external API header
int den
denominator
Definition: rational.h:45
int len
uint32_t av_get_random_seed(void)
Get random data.
Definition: random_seed.c:95
simple arithmetic expression evaluator