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parseutils.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /**
20  * @file
21  * misc parsing utilities
22  */
23 
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 #include "time.h"
35 
36 #ifdef TEST
37 
38 #define av_get_random_seed av_get_random_seed_deterministic
39 static uint32_t av_get_random_seed_deterministic(void);
40 
41 #define av_gettime() 1331972053200000
42 
43 #endif
44 
45 int av_parse_ratio(AVRational *q, const char *str, int max,
46  int log_offset, void *log_ctx)
47 {
48  char c;
49  int ret;
50 
51  if (sscanf(str, "%d:%d%c", &q->num, &q->den, &c) != 2) {
52  double d;
53  ret = av_expr_parse_and_eval(&d, str, NULL, NULL,
54  NULL, NULL, NULL, NULL,
55  NULL, log_offset, log_ctx);
56  if (ret < 0)
57  return ret;
58  *q = av_d2q(d, max);
59  } else {
60  av_reduce(&q->num, &q->den, q->num, q->den, max);
61  }
62 
63  return 0;
64 }
65 
66 typedef struct VideoSizeAbbr {
67  const char *abbr;
68  int width, height;
70 
71 typedef struct VideoRateAbbr {
72  const char *abbr;
75 
76 static const VideoSizeAbbr video_size_abbrs[] = {
77  { "ntsc", 720, 480 },
78  { "pal", 720, 576 },
79  { "qntsc", 352, 240 }, /* VCD compliant NTSC */
80  { "qpal", 352, 288 }, /* VCD compliant PAL */
81  { "sntsc", 640, 480 }, /* square pixel NTSC */
82  { "spal", 768, 576 }, /* square pixel PAL */
83  { "film", 352, 240 },
84  { "ntsc-film", 352, 240 },
85  { "sqcif", 128, 96 },
86  { "qcif", 176, 144 },
87  { "cif", 352, 288 },
88  { "4cif", 704, 576 },
89  { "16cif", 1408,1152 },
90  { "qqvga", 160, 120 },
91  { "qvga", 320, 240 },
92  { "vga", 640, 480 },
93  { "svga", 800, 600 },
94  { "xga", 1024, 768 },
95  { "uxga", 1600,1200 },
96  { "qxga", 2048,1536 },
97  { "sxga", 1280,1024 },
98  { "qsxga", 2560,2048 },
99  { "hsxga", 5120,4096 },
100  { "wvga", 852, 480 },
101  { "wxga", 1366, 768 },
102  { "wsxga", 1600,1024 },
103  { "wuxga", 1920,1200 },
104  { "woxga", 2560,1600 },
105  { "wqsxga", 3200,2048 },
106  { "wquxga", 3840,2400 },
107  { "whsxga", 6400,4096 },
108  { "whuxga", 7680,4800 },
109  { "cga", 320, 200 },
110  { "ega", 640, 350 },
111  { "hd480", 852, 480 },
112  { "hd720", 1280, 720 },
113  { "hd1080", 1920,1080 },
114  { "2k", 2048,1080 }, /* Digital Cinema System Specification */
115  { "2kdci", 2048,1080 },
116  { "2kflat", 1998,1080 },
117  { "2kscope", 2048, 858 },
118  { "4k", 4096,2160 }, /* Digital Cinema System Specification */
119  { "4kdci", 4096,2160 },
120  { "4kflat", 3996,2160 },
121  { "4kscope", 4096,1716 },
122  { "nhd", 640,360 },
123  { "hqvga", 240,160 },
124  { "wqvga", 400,240 },
125  { "fwqvga", 432,240 },
126  { "hvga", 480,320 },
127  { "qhd", 960,540 },
128  { "uhd2160", 3840,2160 },
129  { "uhd4320", 7680,4320 },
130 };
131 
133  { "ntsc", { 30000, 1001 } },
134  { "pal", { 25, 1 } },
135  { "qntsc", { 30000, 1001 } }, /* VCD compliant NTSC */
136  { "qpal", { 25, 1 } }, /* VCD compliant PAL */
137  { "sntsc", { 30000, 1001 } }, /* square pixel NTSC */
138  { "spal", { 25, 1 } }, /* square pixel PAL */
139  { "film", { 24, 1 } },
140  { "ntsc-film", { 24000, 1001 } },
141 };
142 
143 static const char *months[12] = {
144  "january", "february", "march", "april", "may", "june", "july", "august",
145  "september", "october", "november", "december"
146 };
147 
148 int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
149 {
150  int i;
151  int n = FF_ARRAY_ELEMS(video_size_abbrs);
152  const char *p;
153  int width = 0, height = 0;
154 
155  for (i = 0; i < n; i++) {
156  if (!strcmp(video_size_abbrs[i].abbr, str)) {
157  width = video_size_abbrs[i].width;
158  height = video_size_abbrs[i].height;
159  break;
160  }
161  }
162  if (i == n) {
163  width = strtol(str, (void*)&p, 10);
164  if (*p)
165  p++;
166  height = strtol(p, (void*)&p, 10);
167 
168  /* trailing extraneous data detected, like in 123x345foobar */
169  if (*p)
170  return AVERROR(EINVAL);
171  }
172  if (width <= 0 || height <= 0)
173  return AVERROR(EINVAL);
174  *width_ptr = width;
175  *height_ptr = height;
176  return 0;
177 }
178 
179 int av_parse_video_rate(AVRational *rate, const char *arg)
180 {
181  int i, ret;
182  int n = FF_ARRAY_ELEMS(video_rate_abbrs);
183 
184  /* First, we check our abbreviation table */
185  for (i = 0; i < n; ++i)
186  if (!strcmp(video_rate_abbrs[i].abbr, arg)) {
187  *rate = video_rate_abbrs[i].rate;
188  return 0;
189  }
190 
191  /* Then, we try to parse it as fraction */
192  if ((ret = av_parse_ratio_quiet(rate, arg, 1001000)) < 0)
193  return ret;
194  if (rate->num <= 0 || rate->den <= 0)
195  return AVERROR(EINVAL);
196  return 0;
197 }
198 
199 typedef struct ColorEntry {
200  const char *name; ///< a string representing the name of the color
201  uint8_t rgb_color[3]; ///< RGB values for the color
202 } ColorEntry;
203 
204 static const ColorEntry color_table[] = {
205  { "AliceBlue", { 0xF0, 0xF8, 0xFF } },
206  { "AntiqueWhite", { 0xFA, 0xEB, 0xD7 } },
207  { "Aqua", { 0x00, 0xFF, 0xFF } },
208  { "Aquamarine", { 0x7F, 0xFF, 0xD4 } },
209  { "Azure", { 0xF0, 0xFF, 0xFF } },
210  { "Beige", { 0xF5, 0xF5, 0xDC } },
211  { "Bisque", { 0xFF, 0xE4, 0xC4 } },
212  { "Black", { 0x00, 0x00, 0x00 } },
213  { "BlanchedAlmond", { 0xFF, 0xEB, 0xCD } },
214  { "Blue", { 0x00, 0x00, 0xFF } },
215  { "BlueViolet", { 0x8A, 0x2B, 0xE2 } },
216  { "Brown", { 0xA5, 0x2A, 0x2A } },
217  { "BurlyWood", { 0xDE, 0xB8, 0x87 } },
218  { "CadetBlue", { 0x5F, 0x9E, 0xA0 } },
219  { "Chartreuse", { 0x7F, 0xFF, 0x00 } },
220  { "Chocolate", { 0xD2, 0x69, 0x1E } },
221  { "Coral", { 0xFF, 0x7F, 0x50 } },
222  { "CornflowerBlue", { 0x64, 0x95, 0xED } },
223  { "Cornsilk", { 0xFF, 0xF8, 0xDC } },
224  { "Crimson", { 0xDC, 0x14, 0x3C } },
225  { "Cyan", { 0x00, 0xFF, 0xFF } },
226  { "DarkBlue", { 0x00, 0x00, 0x8B } },
227  { "DarkCyan", { 0x00, 0x8B, 0x8B } },
228  { "DarkGoldenRod", { 0xB8, 0x86, 0x0B } },
229  { "DarkGray", { 0xA9, 0xA9, 0xA9 } },
230  { "DarkGreen", { 0x00, 0x64, 0x00 } },
231  { "DarkKhaki", { 0xBD, 0xB7, 0x6B } },
232  { "DarkMagenta", { 0x8B, 0x00, 0x8B } },
233  { "DarkOliveGreen", { 0x55, 0x6B, 0x2F } },
234  { "Darkorange", { 0xFF, 0x8C, 0x00 } },
235  { "DarkOrchid", { 0x99, 0x32, 0xCC } },
236  { "DarkRed", { 0x8B, 0x00, 0x00 } },
237  { "DarkSalmon", { 0xE9, 0x96, 0x7A } },
238  { "DarkSeaGreen", { 0x8F, 0xBC, 0x8F } },
239  { "DarkSlateBlue", { 0x48, 0x3D, 0x8B } },
240  { "DarkSlateGray", { 0x2F, 0x4F, 0x4F } },
241  { "DarkTurquoise", { 0x00, 0xCE, 0xD1 } },
242  { "DarkViolet", { 0x94, 0x00, 0xD3 } },
243  { "DeepPink", { 0xFF, 0x14, 0x93 } },
244  { "DeepSkyBlue", { 0x00, 0xBF, 0xFF } },
245  { "DimGray", { 0x69, 0x69, 0x69 } },
246  { "DodgerBlue", { 0x1E, 0x90, 0xFF } },
247  { "FireBrick", { 0xB2, 0x22, 0x22 } },
248  { "FloralWhite", { 0xFF, 0xFA, 0xF0 } },
249  { "ForestGreen", { 0x22, 0x8B, 0x22 } },
250  { "Fuchsia", { 0xFF, 0x00, 0xFF } },
251  { "Gainsboro", { 0xDC, 0xDC, 0xDC } },
252  { "GhostWhite", { 0xF8, 0xF8, 0xFF } },
253  { "Gold", { 0xFF, 0xD7, 0x00 } },
254  { "GoldenRod", { 0xDA, 0xA5, 0x20 } },
255  { "Gray", { 0x80, 0x80, 0x80 } },
256  { "Green", { 0x00, 0x80, 0x00 } },
257  { "GreenYellow", { 0xAD, 0xFF, 0x2F } },
258  { "HoneyDew", { 0xF0, 0xFF, 0xF0 } },
259  { "HotPink", { 0xFF, 0x69, 0xB4 } },
260  { "IndianRed", { 0xCD, 0x5C, 0x5C } },
261  { "Indigo", { 0x4B, 0x00, 0x82 } },
262  { "Ivory", { 0xFF, 0xFF, 0xF0 } },
263  { "Khaki", { 0xF0, 0xE6, 0x8C } },
264  { "Lavender", { 0xE6, 0xE6, 0xFA } },
265  { "LavenderBlush", { 0xFF, 0xF0, 0xF5 } },
266  { "LawnGreen", { 0x7C, 0xFC, 0x00 } },
267  { "LemonChiffon", { 0xFF, 0xFA, 0xCD } },
268  { "LightBlue", { 0xAD, 0xD8, 0xE6 } },
269  { "LightCoral", { 0xF0, 0x80, 0x80 } },
270  { "LightCyan", { 0xE0, 0xFF, 0xFF } },
271  { "LightGoldenRodYellow", { 0xFA, 0xFA, 0xD2 } },
272  { "LightGreen", { 0x90, 0xEE, 0x90 } },
273  { "LightGrey", { 0xD3, 0xD3, 0xD3 } },
274  { "LightPink", { 0xFF, 0xB6, 0xC1 } },
275  { "LightSalmon", { 0xFF, 0xA0, 0x7A } },
276  { "LightSeaGreen", { 0x20, 0xB2, 0xAA } },
277  { "LightSkyBlue", { 0x87, 0xCE, 0xFA } },
278  { "LightSlateGray", { 0x77, 0x88, 0x99 } },
279  { "LightSteelBlue", { 0xB0, 0xC4, 0xDE } },
280  { "LightYellow", { 0xFF, 0xFF, 0xE0 } },
281  { "Lime", { 0x00, 0xFF, 0x00 } },
282  { "LimeGreen", { 0x32, 0xCD, 0x32 } },
283  { "Linen", { 0xFA, 0xF0, 0xE6 } },
284  { "Magenta", { 0xFF, 0x00, 0xFF } },
285  { "Maroon", { 0x80, 0x00, 0x00 } },
286  { "MediumAquaMarine", { 0x66, 0xCD, 0xAA } },
287  { "MediumBlue", { 0x00, 0x00, 0xCD } },
288  { "MediumOrchid", { 0xBA, 0x55, 0xD3 } },
289  { "MediumPurple", { 0x93, 0x70, 0xD8 } },
290  { "MediumSeaGreen", { 0x3C, 0xB3, 0x71 } },
291  { "MediumSlateBlue", { 0x7B, 0x68, 0xEE } },
292  { "MediumSpringGreen", { 0x00, 0xFA, 0x9A } },
293  { "MediumTurquoise", { 0x48, 0xD1, 0xCC } },
294  { "MediumVioletRed", { 0xC7, 0x15, 0x85 } },
295  { "MidnightBlue", { 0x19, 0x19, 0x70 } },
296  { "MintCream", { 0xF5, 0xFF, 0xFA } },
297  { "MistyRose", { 0xFF, 0xE4, 0xE1 } },
298  { "Moccasin", { 0xFF, 0xE4, 0xB5 } },
299  { "NavajoWhite", { 0xFF, 0xDE, 0xAD } },
300  { "Navy", { 0x00, 0x00, 0x80 } },
301  { "OldLace", { 0xFD, 0xF5, 0xE6 } },
302  { "Olive", { 0x80, 0x80, 0x00 } },
303  { "OliveDrab", { 0x6B, 0x8E, 0x23 } },
304  { "Orange", { 0xFF, 0xA5, 0x00 } },
305  { "OrangeRed", { 0xFF, 0x45, 0x00 } },
306  { "Orchid", { 0xDA, 0x70, 0xD6 } },
307  { "PaleGoldenRod", { 0xEE, 0xE8, 0xAA } },
308  { "PaleGreen", { 0x98, 0xFB, 0x98 } },
309  { "PaleTurquoise", { 0xAF, 0xEE, 0xEE } },
310  { "PaleVioletRed", { 0xD8, 0x70, 0x93 } },
311  { "PapayaWhip", { 0xFF, 0xEF, 0xD5 } },
312  { "PeachPuff", { 0xFF, 0xDA, 0xB9 } },
313  { "Peru", { 0xCD, 0x85, 0x3F } },
314  { "Pink", { 0xFF, 0xC0, 0xCB } },
315  { "Plum", { 0xDD, 0xA0, 0xDD } },
316  { "PowderBlue", { 0xB0, 0xE0, 0xE6 } },
317  { "Purple", { 0x80, 0x00, 0x80 } },
318  { "Red", { 0xFF, 0x00, 0x00 } },
319  { "RosyBrown", { 0xBC, 0x8F, 0x8F } },
320  { "RoyalBlue", { 0x41, 0x69, 0xE1 } },
321  { "SaddleBrown", { 0x8B, 0x45, 0x13 } },
322  { "Salmon", { 0xFA, 0x80, 0x72 } },
323  { "SandyBrown", { 0xF4, 0xA4, 0x60 } },
324  { "SeaGreen", { 0x2E, 0x8B, 0x57 } },
325  { "SeaShell", { 0xFF, 0xF5, 0xEE } },
326  { "Sienna", { 0xA0, 0x52, 0x2D } },
327  { "Silver", { 0xC0, 0xC0, 0xC0 } },
328  { "SkyBlue", { 0x87, 0xCE, 0xEB } },
329  { "SlateBlue", { 0x6A, 0x5A, 0xCD } },
330  { "SlateGray", { 0x70, 0x80, 0x90 } },
331  { "Snow", { 0xFF, 0xFA, 0xFA } },
332  { "SpringGreen", { 0x00, 0xFF, 0x7F } },
333  { "SteelBlue", { 0x46, 0x82, 0xB4 } },
334  { "Tan", { 0xD2, 0xB4, 0x8C } },
335  { "Teal", { 0x00, 0x80, 0x80 } },
336  { "Thistle", { 0xD8, 0xBF, 0xD8 } },
337  { "Tomato", { 0xFF, 0x63, 0x47 } },
338  { "Turquoise", { 0x40, 0xE0, 0xD0 } },
339  { "Violet", { 0xEE, 0x82, 0xEE } },
340  { "Wheat", { 0xF5, 0xDE, 0xB3 } },
341  { "White", { 0xFF, 0xFF, 0xFF } },
342  { "WhiteSmoke", { 0xF5, 0xF5, 0xF5 } },
343  { "Yellow", { 0xFF, 0xFF, 0x00 } },
344  { "YellowGreen", { 0x9A, 0xCD, 0x32 } },
345 };
346 
347 static int color_table_compare(const void *lhs, const void *rhs)
348 {
349  return av_strcasecmp(lhs, ((const ColorEntry *)rhs)->name);
350 }
351 
352 #define ALPHA_SEP '@'
353 
354 int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
355  void *log_ctx)
356 {
357  char *tail, color_string2[128];
358  const ColorEntry *entry;
359  int len, hex_offset = 0;
360 
361  if (color_string[0] == '#') {
362  hex_offset = 1;
363  } else if (!strncmp(color_string, "0x", 2))
364  hex_offset = 2;
365 
366  if (slen < 0)
367  slen = strlen(color_string);
368  av_strlcpy(color_string2, color_string + hex_offset,
369  FFMIN(slen-hex_offset+1, sizeof(color_string2)));
370  if ((tail = strchr(color_string2, ALPHA_SEP)))
371  *tail++ = 0;
372  len = strlen(color_string2);
373  rgba_color[3] = 255;
374 
375  if (!av_strcasecmp(color_string2, "random") || !av_strcasecmp(color_string2, "bikeshed")) {
376  int rgba = av_get_random_seed();
377  rgba_color[0] = rgba >> 24;
378  rgba_color[1] = rgba >> 16;
379  rgba_color[2] = rgba >> 8;
380  rgba_color[3] = rgba;
381  } else if (hex_offset ||
382  strspn(color_string2, "0123456789ABCDEFabcdef") == len) {
383  char *tail;
384  unsigned int rgba = strtoul(color_string2, &tail, 16);
385 
386  if (*tail || (len != 6 && len != 8)) {
387  av_log(log_ctx, AV_LOG_ERROR, "Invalid 0xRRGGBB[AA] color string: '%s'\n", color_string2);
388  return AVERROR(EINVAL);
389  }
390  if (len == 8) {
391  rgba_color[3] = rgba;
392  rgba >>= 8;
393  }
394  rgba_color[0] = rgba >> 16;
395  rgba_color[1] = rgba >> 8;
396  rgba_color[2] = rgba;
397  } else {
398  entry = bsearch(color_string2,
399  color_table,
400  FF_ARRAY_ELEMS(color_table),
401  sizeof(ColorEntry),
403  if (!entry) {
404  av_log(log_ctx, AV_LOG_ERROR, "Cannot find color '%s'\n", color_string2);
405  return AVERROR(EINVAL);
406  }
407  memcpy(rgba_color, entry->rgb_color, 3);
408  }
409 
410  if (tail) {
411  double alpha;
412  const char *alpha_string = tail;
413  if (!strncmp(alpha_string, "0x", 2)) {
414  alpha = strtoul(alpha_string, &tail, 16);
415  } else {
416  double norm_alpha = strtod(alpha_string, &tail);
417  if (norm_alpha < 0.0 || norm_alpha > 1.0)
418  alpha = 256;
419  else
420  alpha = 255 * norm_alpha;
421  }
422 
423  if (tail == alpha_string || *tail || alpha > 255 || alpha < 0) {
424  av_log(log_ctx, AV_LOG_ERROR, "Invalid alpha value specifier '%s' in '%s'\n",
425  alpha_string, color_string);
426  return AVERROR(EINVAL);
427  }
428  rgba_color[3] = alpha;
429  }
430 
431  return 0;
432 }
433 
434 const char *av_get_known_color_name(int color_idx, const uint8_t **rgbp)
435 {
436  const ColorEntry *color;
437 
438  if ((unsigned)color_idx >= FF_ARRAY_ELEMS(color_table))
439  return NULL;
440 
441  color = &color_table[color_idx];
442  if (rgbp)
443  *rgbp = color->rgb_color;
444 
445  return color->name;
446 }
447 
448 /* get a positive number between n_min and n_max, for a maximum length
449  of len_max. Return -1 if error. */
450 static int date_get_num(const char **pp,
451  int n_min, int n_max, int len_max)
452 {
453  int i, val, c;
454  const char *p;
455 
456  p = *pp;
457  val = 0;
458  for(i = 0; i < len_max; i++) {
459  c = *p;
460  if (!av_isdigit(c))
461  break;
462  val = (val * 10) + c - '0';
463  p++;
464  }
465  /* no number read ? */
466  if (p == *pp)
467  return -1;
468  if (val < n_min || val > n_max)
469  return -1;
470  *pp = p;
471  return val;
472 }
473 
474 static int date_get_month(const char **pp) {
475  int i = 0;
476  for (; i < 12; i++) {
477  if (!av_strncasecmp(*pp, months[i], 3)) {
478  const char *mo_full = months[i] + 3;
479  int len = strlen(mo_full);
480  *pp += 3;
481  if (len > 0 && !av_strncasecmp(*pp, mo_full, len))
482  *pp += len;
483  return i;
484  }
485  }
486  return -1;
487 }
488 
489 char *av_small_strptime(const char *p, const char *fmt, struct tm *dt)
490 {
491  int c, val;
492 
493  while((c = *fmt++)) {
494  if (c != '%') {
495  if (av_isspace(c))
496  for (; *p && av_isspace(*p); p++);
497  else if (*p != c)
498  return NULL;
499  else p++;
500  continue;
501  }
502 
503  c = *fmt++;
504  switch(c) {
505  case 'H':
506  case 'J':
507  val = date_get_num(&p, 0, c == 'H' ? 23 : INT_MAX, 2);
508 
509  if (val == -1)
510  return NULL;
511  dt->tm_hour = val;
512  break;
513  case 'M':
514  val = date_get_num(&p, 0, 59, 2);
515  if (val == -1)
516  return NULL;
517  dt->tm_min = val;
518  break;
519  case 'S':
520  val = date_get_num(&p, 0, 59, 2);
521  if (val == -1)
522  return NULL;
523  dt->tm_sec = val;
524  break;
525  case 'Y':
526  val = date_get_num(&p, 0, 9999, 4);
527  if (val == -1)
528  return NULL;
529  dt->tm_year = val - 1900;
530  break;
531  case 'm':
532  val = date_get_num(&p, 1, 12, 2);
533  if (val == -1)
534  return NULL;
535  dt->tm_mon = val - 1;
536  break;
537  case 'd':
538  val = date_get_num(&p, 1, 31, 2);
539  if (val == -1)
540  return NULL;
541  dt->tm_mday = val;
542  break;
543  case 'T':
544  p = av_small_strptime(p, "%H:%M:%S", dt);
545  if (!p)
546  return NULL;
547  break;
548  case 'b':
549  case 'B':
550  case 'h':
551  val = date_get_month(&p);
552  if (val == -1)
553  return NULL;
554  dt->tm_mon = val;
555  break;
556  case '%':
557  if (*p++ != '%')
558  return NULL;
559  break;
560  default:
561  return NULL;
562  }
563  }
564 
565  return (char*)p;
566 }
567 
568 time_t av_timegm(struct tm *tm)
569 {
570  time_t t;
571 
572  int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
573 
574  if (m < 3) {
575  m += 12;
576  y--;
577  }
578 
579  t = 86400LL *
580  (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + y / 400 - 719469);
581 
582  t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
583 
584  return t;
585 }
586 
587 int av_parse_time(int64_t *timeval, const char *timestr, int duration)
588 {
589  const char *p, *q;
590  int64_t t, now64;
591  time_t now;
592  struct tm dt = { 0 }, tmbuf;
593  int today = 0, negative = 0, microseconds = 0;
594  int i;
595  static const char * const date_fmt[] = {
596  "%Y - %m - %d",
597  "%Y%m%d",
598  };
599  static const char * const time_fmt[] = {
600  "%H:%M:%S",
601  "%H%M%S",
602  };
603  static const char * const tz_fmt[] = {
604  "%H:%M",
605  "%H%M",
606  "%H",
607  };
608 
609  p = timestr;
610  q = NULL;
611  *timeval = INT64_MIN;
612  if (!duration) {
613  now64 = av_gettime();
614  now = now64 / 1000000;
615 
616  if (!av_strcasecmp(timestr, "now")) {
617  *timeval = now64;
618  return 0;
619  }
620 
621  /* parse the year-month-day part */
622  for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) {
623  q = av_small_strptime(p, date_fmt[i], &dt);
624  if (q)
625  break;
626  }
627 
628  /* if the year-month-day part is missing, then take the
629  * current year-month-day time */
630  if (!q) {
631  today = 1;
632  q = p;
633  }
634  p = q;
635 
636  if (*p == 'T' || *p == 't')
637  p++;
638  else
639  while (av_isspace(*p))
640  p++;
641 
642  /* parse the hour-minute-second part */
643  for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) {
644  q = av_small_strptime(p, time_fmt[i], &dt);
645  if (q)
646  break;
647  }
648  } else {
649  /* parse timestr as a duration */
650  if (p[0] == '-') {
651  negative = 1;
652  ++p;
653  }
654  /* parse timestr as HH:MM:SS */
655  q = av_small_strptime(p, "%J:%M:%S", &dt);
656  if (!q) {
657  /* parse timestr as MM:SS */
658  q = av_small_strptime(p, "%M:%S", &dt);
659  dt.tm_hour = 0;
660  }
661  if (!q) {
662  char *o;
663  /* parse timestr as S+ */
664  dt.tm_sec = strtol(p, &o, 10);
665  if (o == p) /* the parsing didn't succeed */
666  return AVERROR(EINVAL);
667  dt.tm_min = 0;
668  dt.tm_hour = 0;
669  q = o;
670  }
671  }
672 
673  /* Now we have all the fields that we can get */
674  if (!q)
675  return AVERROR(EINVAL);
676 
677  /* parse the .m... part */
678  if (*q == '.') {
679  int n;
680  q++;
681  for (n = 100000; n >= 1; n /= 10, q++) {
682  if (!av_isdigit(*q))
683  break;
684  microseconds += n * (*q - '0');
685  }
686  while (av_isdigit(*q))
687  q++;
688  }
689 
690  if (duration) {
691  t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
692  } else {
693  int is_utc = *q == 'Z' || *q == 'z';
694  int tzoffset = 0;
695  q += is_utc;
696  if (!today && !is_utc && (*q == '+' || *q == '-')) {
697  struct tm tz = { 0 };
698  int sign = (*q == '+' ? -1 : 1);
699  q++;
700  p = q;
701  for (i = 0; i < FF_ARRAY_ELEMS(tz_fmt); i++) {
702  q = av_small_strptime(p, tz_fmt[i], &tz);
703  if (q)
704  break;
705  }
706  if (!q)
707  return AVERROR(EINVAL);
708  tzoffset = sign * (tz.tm_hour * 60 + tz.tm_min) * 60;
709  is_utc = 1;
710  }
711  if (today) { /* fill in today's date */
712  struct tm dt2 = is_utc ? *gmtime_r(&now, &tmbuf) : *localtime_r(&now, &tmbuf);
713  dt2.tm_hour = dt.tm_hour;
714  dt2.tm_min = dt.tm_min;
715  dt2.tm_sec = dt.tm_sec;
716  dt = dt2;
717  }
718  dt.tm_isdst = is_utc ? 0 : -1;
719  t = is_utc ? av_timegm(&dt) : mktime(&dt);
720  t += tzoffset;
721  }
722 
723  /* Check that we are at the end of the string */
724  if (*q)
725  return AVERROR(EINVAL);
726 
727  t *= 1000000;
728  t += microseconds;
729  *timeval = negative ? -t : t;
730  return 0;
731 }
732 
733 int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
734 {
735  const char *p;
736  char tag[128], *q;
737 
738  p = info;
739  if (*p == '?')
740  p++;
741  for(;;) {
742  q = tag;
743  while (*p != '\0' && *p != '=' && *p != '&') {
744  if ((q - tag) < sizeof(tag) - 1)
745  *q++ = *p;
746  p++;
747  }
748  *q = '\0';
749  q = arg;
750  if (*p == '=') {
751  p++;
752  while (*p != '&' && *p != '\0') {
753  if ((q - arg) < arg_size - 1) {
754  if (*p == '+')
755  *q++ = ' ';
756  else
757  *q++ = *p;
758  }
759  p++;
760  }
761  }
762  *q = '\0';
763  if (!strcmp(tag, tag1))
764  return 1;
765  if (*p != '&')
766  break;
767  p++;
768  }
769  return 0;
770 }
time_t av_timegm(struct tm *tm)
Convert the decomposed UTC time in tm to a time_t value.
Definition: parseutils.c:568
int av_parse_ratio(AVRational *q, const char *str, int max, int log_offset, void *log_ctx)
Parse str and store the parsed ratio in q.
Definition: parseutils.c:45
static uint32_t av_get_random_seed_deterministic(void)
Definition: parseutils.c:31
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.h:206
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
Definition: parseutils.c:179
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:148
const char * fmt
Definition: avisynth_c.h:769
const char * abbr
Definition: parseutils.c:67
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:587
static int date_get_month(const char **pp)
Definition: parseutils.c:474
const char * abbr
Definition: parseutils.c:72
#define ALPHA_SEP
Definition: parseutils.c:352
int num
Numerator.
Definition: rational.h:59
static av_const int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.h:222
const char * name
a string representing the name of the color
Definition: xpmdec.c:35
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
Convenience header that includes libavutil's core.
uint8_t
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
AVRational rate
Definition: parseutils.c:73
int64_t duration
Definition: movenc.c:63
char * av_small_strptime(const char *p, const char *fmt, struct tm *dt)
Simplified version of strptime.
Definition: parseutils.c:489
double strtod(const char *, char **)
#define height
uint32_t tag
Definition: movenc.c:1413
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:733
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
#define av_log(a,...)
uint32_t rgb_color
RGB values for the color.
Definition: xpmdec.c:36
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:354
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:726
static double alpha(void *priv, double x, double y)
Definition: vf_geq.c:99
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
const char * arg
Definition: jacosubdec.c:66
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:83
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
const char * av_get_known_color_name(int color_idx, const uint8_t **rgbp)
Get the name of a color from the internal table of hard-coded named colors.
Definition: parseutils.c:434
#define FFMIN(a, b)
Definition: common.h:96
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
static struct tm * localtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:37
#define width
int n
Definition: avisynth_c.h:684
#define FF_ARRAY_ELEMS(a)
static int color_table_compare(const void *lhs, const void *rhs)
Definition: parseutils.c:347
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
static const ColorEntry color_table[]
Definition: parseutils.c:204
static const VideoRateAbbr video_rate_abbrs[]
Definition: parseutils.c:132
static int date_get_num(const char **pp, int n_min, int n_max, int len_max)
Definition: parseutils.c:450
Rational number (pair of numerator and denominator).
Definition: rational.h:58
misc parsing utilities
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:106
static const char * months[12]
Definition: parseutils.c:143
static const VideoSizeAbbr video_size_abbrs[]
Definition: parseutils.c:76
common internal and external API header
static double c[64]
int den
Denominator.
Definition: rational.h:60
int len
uint32_t av_get_random_seed(void)
Get a seed to use in conjunction with random functions.
Definition: random_seed.c:120
#define av_parse_ratio_quiet(rate, str, max)
Definition: parseutils.h:52
simple arithmetic expression evaluator
const char * name
Definition: opengl_enc.c:103