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
av_parse_ratio(AVRational *q, const char *str, int max, int log_offset, void *log_ctx)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;
69 } VideoSizeAbbr;
70
71 typedef struct VideoRateAbbr {
72 const char *abbr;
73 AVRational rate;
74 } VideoRateAbbr;
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 { "wqhd", 2560,1440 },
106 { "wqsxga", 3200,2048 },
107 { "wquxga", 3840,2400 },
108 { "whsxga", 6400,4096 },
109 { "whuxga", 7680,4800 },
110 { "cga", 320, 200 },
111 { "ega", 640, 350 },
112 { "hd480", 852, 480 },
113 { "hd720", 1280, 720 },
114 { "hd1080", 1920,1080 },
115 { "quadhd", 2560,1440 },
116 { "2k", 2048,1080 }, /* Digital Cinema System Specification */
117 { "2kdci", 2048,1080 },
118 { "2kflat", 1998,1080 },
119 { "2kscope", 2048, 858 },
120 { "4k", 4096,2160 }, /* Digital Cinema System Specification */
121 { "4kdci", 4096,2160 },
122 { "4kflat", 3996,2160 },
123 { "4kscope", 4096,1716 },
124 { "nhd", 640,360 },
125 { "hqvga", 240,160 },
126 { "wqvga", 400,240 },
127 { "fwqvga", 432,240 },
128 { "hvga", 480,320 },
129 { "qhd", 960,540 },
130 { "uhd2160", 3840,2160 },
131 { "uhd4320", 7680,4320 },
132 };
133
134 static const VideoRateAbbr video_rate_abbrs[]= {
135 { "ntsc", { 30000, 1001 } },
136 { "pal", { 25, 1 } },
137 { "qntsc", { 30000, 1001 } }, /* VCD compliant NTSC */
138 { "qpal", { 25, 1 } }, /* VCD compliant PAL */
139 { "sntsc", { 30000, 1001 } }, /* square pixel NTSC */
140 { "spal", { 25, 1 } }, /* square pixel PAL */
141 { "film", { 24, 1 } },
142 { "ntsc-film", { 24000, 1001 } },
143 };
144
145 static const char *months[12] = {
146 "january", "february", "march", "april", "may", "june", "july", "august",
147 "september", "october", "november", "december"
148 };
149
av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)150 int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
151 {
152 int i;
153 int n = FF_ARRAY_ELEMS(video_size_abbrs);
154 const char *p;
155 int width = 0, height = 0;
156
157 for (i = 0; i < n; i++) {
158 if (!strcmp(video_size_abbrs[i].abbr, str)) {
159 width = video_size_abbrs[i].width;
160 height = video_size_abbrs[i].height;
161 break;
162 }
163 }
164 if (i == n) {
165 width = strtol(str, (void*)&p, 10);
166 if (*p)
167 p++;
168 height = strtol(p, (void*)&p, 10);
169
170 /* trailing extraneous data detected, like in 123x345foobar */
171 if (*p)
172 return AVERROR(EINVAL);
173 }
174 if (width <= 0 || height <= 0)
175 return AVERROR(EINVAL);
176 *width_ptr = width;
177 *height_ptr = height;
178 return 0;
179 }
180
av_parse_video_rate(AVRational *rate, const char *arg)181 int av_parse_video_rate(AVRational *rate, const char *arg)
182 {
183 int i, ret;
184 int n = FF_ARRAY_ELEMS(video_rate_abbrs);
185
186 /* First, we check our abbreviation table */
187 for (i = 0; i < n; ++i)
188 if (!strcmp(video_rate_abbrs[i].abbr, arg)) {
189 *rate = video_rate_abbrs[i].rate;
190 return 0;
191 }
192
193 /* Then, we try to parse it as fraction */
194 if ((ret = av_parse_ratio_quiet(rate, arg, 1001000)) < 0)
195 return ret;
196 if (rate->num <= 0 || rate->den <= 0)
197 return AVERROR(EINVAL);
198 return 0;
199 }
200
201 typedef struct ColorEntry {
202 const char *name; ///< a string representing the name of the color
203 uint8_t rgb_color[3]; ///< RGB values for the color
204 } ColorEntry;
205
206 static const ColorEntry color_table[] = {
207 { "AliceBlue", { 0xF0, 0xF8, 0xFF } },
208 { "AntiqueWhite", { 0xFA, 0xEB, 0xD7 } },
209 { "Aqua", { 0x00, 0xFF, 0xFF } },
210 { "Aquamarine", { 0x7F, 0xFF, 0xD4 } },
211 { "Azure", { 0xF0, 0xFF, 0xFF } },
212 { "Beige", { 0xF5, 0xF5, 0xDC } },
213 { "Bisque", { 0xFF, 0xE4, 0xC4 } },
214 { "Black", { 0x00, 0x00, 0x00 } },
215 { "BlanchedAlmond", { 0xFF, 0xEB, 0xCD } },
216 { "Blue", { 0x00, 0x00, 0xFF } },
217 { "BlueViolet", { 0x8A, 0x2B, 0xE2 } },
218 { "Brown", { 0xA5, 0x2A, 0x2A } },
219 { "BurlyWood", { 0xDE, 0xB8, 0x87 } },
220 { "CadetBlue", { 0x5F, 0x9E, 0xA0 } },
221 { "Chartreuse", { 0x7F, 0xFF, 0x00 } },
222 { "Chocolate", { 0xD2, 0x69, 0x1E } },
223 { "Coral", { 0xFF, 0x7F, 0x50 } },
224 { "CornflowerBlue", { 0x64, 0x95, 0xED } },
225 { "Cornsilk", { 0xFF, 0xF8, 0xDC } },
226 { "Crimson", { 0xDC, 0x14, 0x3C } },
227 { "Cyan", { 0x00, 0xFF, 0xFF } },
228 { "DarkBlue", { 0x00, 0x00, 0x8B } },
229 { "DarkCyan", { 0x00, 0x8B, 0x8B } },
230 { "DarkGoldenRod", { 0xB8, 0x86, 0x0B } },
231 { "DarkGray", { 0xA9, 0xA9, 0xA9 } },
232 { "DarkGreen", { 0x00, 0x64, 0x00 } },
233 { "DarkKhaki", { 0xBD, 0xB7, 0x6B } },
234 { "DarkMagenta", { 0x8B, 0x00, 0x8B } },
235 { "DarkOliveGreen", { 0x55, 0x6B, 0x2F } },
236 { "Darkorange", { 0xFF, 0x8C, 0x00 } },
237 { "DarkOrchid", { 0x99, 0x32, 0xCC } },
238 { "DarkRed", { 0x8B, 0x00, 0x00 } },
239 { "DarkSalmon", { 0xE9, 0x96, 0x7A } },
240 { "DarkSeaGreen", { 0x8F, 0xBC, 0x8F } },
241 { "DarkSlateBlue", { 0x48, 0x3D, 0x8B } },
242 { "DarkSlateGray", { 0x2F, 0x4F, 0x4F } },
243 { "DarkTurquoise", { 0x00, 0xCE, 0xD1 } },
244 { "DarkViolet", { 0x94, 0x00, 0xD3 } },
245 { "DeepPink", { 0xFF, 0x14, 0x93 } },
246 { "DeepSkyBlue", { 0x00, 0xBF, 0xFF } },
247 { "DimGray", { 0x69, 0x69, 0x69 } },
248 { "DodgerBlue", { 0x1E, 0x90, 0xFF } },
249 { "FireBrick", { 0xB2, 0x22, 0x22 } },
250 { "FloralWhite", { 0xFF, 0xFA, 0xF0 } },
251 { "ForestGreen", { 0x22, 0x8B, 0x22 } },
252 { "Fuchsia", { 0xFF, 0x00, 0xFF } },
253 { "Gainsboro", { 0xDC, 0xDC, 0xDC } },
254 { "GhostWhite", { 0xF8, 0xF8, 0xFF } },
255 { "Gold", { 0xFF, 0xD7, 0x00 } },
256 { "GoldenRod", { 0xDA, 0xA5, 0x20 } },
257 { "Gray", { 0x80, 0x80, 0x80 } },
258 { "Green", { 0x00, 0x80, 0x00 } },
259 { "GreenYellow", { 0xAD, 0xFF, 0x2F } },
260 { "HoneyDew", { 0xF0, 0xFF, 0xF0 } },
261 { "HotPink", { 0xFF, 0x69, 0xB4 } },
262 { "IndianRed", { 0xCD, 0x5C, 0x5C } },
263 { "Indigo", { 0x4B, 0x00, 0x82 } },
264 { "Ivory", { 0xFF, 0xFF, 0xF0 } },
265 { "Khaki", { 0xF0, 0xE6, 0x8C } },
266 { "Lavender", { 0xE6, 0xE6, 0xFA } },
267 { "LavenderBlush", { 0xFF, 0xF0, 0xF5 } },
268 { "LawnGreen", { 0x7C, 0xFC, 0x00 } },
269 { "LemonChiffon", { 0xFF, 0xFA, 0xCD } },
270 { "LightBlue", { 0xAD, 0xD8, 0xE6 } },
271 { "LightCoral", { 0xF0, 0x80, 0x80 } },
272 { "LightCyan", { 0xE0, 0xFF, 0xFF } },
273 { "LightGoldenRodYellow", { 0xFA, 0xFA, 0xD2 } },
274 { "LightGreen", { 0x90, 0xEE, 0x90 } },
275 { "LightGrey", { 0xD3, 0xD3, 0xD3 } },
276 { "LightPink", { 0xFF, 0xB6, 0xC1 } },
277 { "LightSalmon", { 0xFF, 0xA0, 0x7A } },
278 { "LightSeaGreen", { 0x20, 0xB2, 0xAA } },
279 { "LightSkyBlue", { 0x87, 0xCE, 0xFA } },
280 { "LightSlateGray", { 0x77, 0x88, 0x99 } },
281 { "LightSteelBlue", { 0xB0, 0xC4, 0xDE } },
282 { "LightYellow", { 0xFF, 0xFF, 0xE0 } },
283 { "Lime", { 0x00, 0xFF, 0x00 } },
284 { "LimeGreen", { 0x32, 0xCD, 0x32 } },
285 { "Linen", { 0xFA, 0xF0, 0xE6 } },
286 { "Magenta", { 0xFF, 0x00, 0xFF } },
287 { "Maroon", { 0x80, 0x00, 0x00 } },
288 { "MediumAquaMarine", { 0x66, 0xCD, 0xAA } },
289 { "MediumBlue", { 0x00, 0x00, 0xCD } },
290 { "MediumOrchid", { 0xBA, 0x55, 0xD3 } },
291 { "MediumPurple", { 0x93, 0x70, 0xD8 } },
292 { "MediumSeaGreen", { 0x3C, 0xB3, 0x71 } },
293 { "MediumSlateBlue", { 0x7B, 0x68, 0xEE } },
294 { "MediumSpringGreen", { 0x00, 0xFA, 0x9A } },
295 { "MediumTurquoise", { 0x48, 0xD1, 0xCC } },
296 { "MediumVioletRed", { 0xC7, 0x15, 0x85 } },
297 { "MidnightBlue", { 0x19, 0x19, 0x70 } },
298 { "MintCream", { 0xF5, 0xFF, 0xFA } },
299 { "MistyRose", { 0xFF, 0xE4, 0xE1 } },
300 { "Moccasin", { 0xFF, 0xE4, 0xB5 } },
301 { "NavajoWhite", { 0xFF, 0xDE, 0xAD } },
302 { "Navy", { 0x00, 0x00, 0x80 } },
303 { "OldLace", { 0xFD, 0xF5, 0xE6 } },
304 { "Olive", { 0x80, 0x80, 0x00 } },
305 { "OliveDrab", { 0x6B, 0x8E, 0x23 } },
306 { "Orange", { 0xFF, 0xA5, 0x00 } },
307 { "OrangeRed", { 0xFF, 0x45, 0x00 } },
308 { "Orchid", { 0xDA, 0x70, 0xD6 } },
309 { "PaleGoldenRod", { 0xEE, 0xE8, 0xAA } },
310 { "PaleGreen", { 0x98, 0xFB, 0x98 } },
311 { "PaleTurquoise", { 0xAF, 0xEE, 0xEE } },
312 { "PaleVioletRed", { 0xD8, 0x70, 0x93 } },
313 { "PapayaWhip", { 0xFF, 0xEF, 0xD5 } },
314 { "PeachPuff", { 0xFF, 0xDA, 0xB9 } },
315 { "Peru", { 0xCD, 0x85, 0x3F } },
316 { "Pink", { 0xFF, 0xC0, 0xCB } },
317 { "Plum", { 0xDD, 0xA0, 0xDD } },
318 { "PowderBlue", { 0xB0, 0xE0, 0xE6 } },
319 { "Purple", { 0x80, 0x00, 0x80 } },
320 { "Red", { 0xFF, 0x00, 0x00 } },
321 { "RosyBrown", { 0xBC, 0x8F, 0x8F } },
322 { "RoyalBlue", { 0x41, 0x69, 0xE1 } },
323 { "SaddleBrown", { 0x8B, 0x45, 0x13 } },
324 { "Salmon", { 0xFA, 0x80, 0x72 } },
325 { "SandyBrown", { 0xF4, 0xA4, 0x60 } },
326 { "SeaGreen", { 0x2E, 0x8B, 0x57 } },
327 { "SeaShell", { 0xFF, 0xF5, 0xEE } },
328 { "Sienna", { 0xA0, 0x52, 0x2D } },
329 { "Silver", { 0xC0, 0xC0, 0xC0 } },
330 { "SkyBlue", { 0x87, 0xCE, 0xEB } },
331 { "SlateBlue", { 0x6A, 0x5A, 0xCD } },
332 { "SlateGray", { 0x70, 0x80, 0x90 } },
333 { "Snow", { 0xFF, 0xFA, 0xFA } },
334 { "SpringGreen", { 0x00, 0xFF, 0x7F } },
335 { "SteelBlue", { 0x46, 0x82, 0xB4 } },
336 { "Tan", { 0xD2, 0xB4, 0x8C } },
337 { "Teal", { 0x00, 0x80, 0x80 } },
338 { "Thistle", { 0xD8, 0xBF, 0xD8 } },
339 { "Tomato", { 0xFF, 0x63, 0x47 } },
340 { "Turquoise", { 0x40, 0xE0, 0xD0 } },
341 { "Violet", { 0xEE, 0x82, 0xEE } },
342 { "Wheat", { 0xF5, 0xDE, 0xB3 } },
343 { "White", { 0xFF, 0xFF, 0xFF } },
344 { "WhiteSmoke", { 0xF5, 0xF5, 0xF5 } },
345 { "Yellow", { 0xFF, 0xFF, 0x00 } },
346 { "YellowGreen", { 0x9A, 0xCD, 0x32 } },
347 };
348
color_table_compare(const void *lhs, const void *rhs)349 static int color_table_compare(const void *lhs, const void *rhs)
350 {
351 return av_strcasecmp(lhs, ((const ColorEntry *)rhs)->name);
352 }
353
354 #define ALPHA_SEP '@'
355
av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx)356 int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
357 void *log_ctx)
358 {
359 char *tail, color_string2[128];
360 const ColorEntry *entry;
361 int len, hex_offset = 0;
362
363 if (color_string[0] == '#') {
364 hex_offset = 1;
365 } else if (!strncmp(color_string, "0x", 2))
366 hex_offset = 2;
367
368 if (slen < 0)
369 slen = strlen(color_string);
370 av_strlcpy(color_string2, color_string + hex_offset,
371 FFMIN(slen-hex_offset+1, sizeof(color_string2)));
372 if ((tail = strchr(color_string2, ALPHA_SEP)))
373 *tail++ = 0;
374 len = strlen(color_string2);
375 rgba_color[3] = 255;
376
377 if (!av_strcasecmp(color_string2, "random") || !av_strcasecmp(color_string2, "bikeshed")) {
378 int rgba = av_get_random_seed();
379 rgba_color[0] = rgba >> 24;
380 rgba_color[1] = rgba >> 16;
381 rgba_color[2] = rgba >> 8;
382 rgba_color[3] = rgba;
383 } else if (hex_offset ||
384 strspn(color_string2, "0123456789ABCDEFabcdef") == len) {
385 char *tail;
386 unsigned int rgba = strtoul(color_string2, &tail, 16);
387
388 if (*tail || (len != 6 && len != 8)) {
389 av_log(log_ctx, AV_LOG_ERROR, "Invalid 0xRRGGBB[AA] color string: '%s'\n", color_string2);
390 return AVERROR(EINVAL);
391 }
392 if (len == 8) {
393 rgba_color[3] = rgba;
394 rgba >>= 8;
395 }
396 rgba_color[0] = rgba >> 16;
397 rgba_color[1] = rgba >> 8;
398 rgba_color[2] = rgba;
399 } else {
400 entry = bsearch(color_string2,
401 color_table,
402 FF_ARRAY_ELEMS(color_table),
403 sizeof(ColorEntry),
404 color_table_compare);
405 if (!entry) {
406 av_log(log_ctx, AV_LOG_ERROR, "Cannot find color '%s'\n", color_string2);
407 return AVERROR(EINVAL);
408 }
409 memcpy(rgba_color, entry->rgb_color, 3);
410 }
411
412 if (tail) {
413 double alpha;
414 const char *alpha_string = tail;
415 if (!strncmp(alpha_string, "0x", 2)) {
416 alpha = strtoul(alpha_string, &tail, 16);
417 } else {
418 double norm_alpha = strtod(alpha_string, &tail);
419 if (norm_alpha < 0.0 || norm_alpha > 1.0)
420 alpha = 256;
421 else
422 alpha = 255 * norm_alpha;
423 }
424
425 if (tail == alpha_string || *tail || alpha > 255 || alpha < 0) {
426 av_log(log_ctx, AV_LOG_ERROR, "Invalid alpha value specifier '%s' in '%s'\n",
427 alpha_string, color_string);
428 return AVERROR(EINVAL);
429 }
430 rgba_color[3] = alpha;
431 }
432
433 return 0;
434 }
435
av_get_known_color_name(int color_idx, const uint8_t **rgbp)436 const char *av_get_known_color_name(int color_idx, const uint8_t **rgbp)
437 {
438 const ColorEntry *color;
439
440 if ((unsigned)color_idx >= FF_ARRAY_ELEMS(color_table))
441 return NULL;
442
443 color = &color_table[color_idx];
444 if (rgbp)
445 *rgbp = color->rgb_color;
446
447 return color->name;
448 }
449
450 /* get a positive number between n_min and n_max, for a maximum length
451 of len_max. Return -1 if error. */
date_get_num(const char **pp, int n_min, int n_max, int len_max)452 static int date_get_num(const char **pp,
453 int n_min, int n_max, int len_max)
454 {
455 int i, val, c;
456 const char *p;
457
458 p = *pp;
459 val = 0;
460 for(i = 0; i < len_max; i++) {
461 c = *p;
462 if (!av_isdigit(c))
463 break;
464 val = (val * 10) + c - '0';
465 p++;
466 }
467 /* no number read ? */
468 if (p == *pp)
469 return -1;
470 if (val < n_min || val > n_max)
471 return -1;
472 *pp = p;
473 return val;
474 }
475
date_get_month(const char **pp)476 static int date_get_month(const char **pp) {
477 int i = 0;
478 for (; i < 12; i++) {
479 if (!av_strncasecmp(*pp, months[i], 3)) {
480 const char *mo_full = months[i] + 3;
481 int len = strlen(mo_full);
482 *pp += 3;
483 if (len > 0 && !av_strncasecmp(*pp, mo_full, len))
484 *pp += len;
485 return i;
486 }
487 }
488 return -1;
489 }
490
av_small_strptime(const char *p, const char *fmt, struct tm *dt)491 char *av_small_strptime(const char *p, const char *fmt, struct tm *dt)
492 {
493 int c, val;
494
495 while((c = *fmt++)) {
496 if (c != '%') {
497 if (av_isspace(c))
498 for (; *p && av_isspace(*p); p++);
499 else if (*p != c)
500 return NULL;
501 else p++;
502 continue;
503 }
504
505 c = *fmt++;
506 switch(c) {
507 case 'H':
508 case 'J':
509 val = date_get_num(&p, 0, c == 'H' ? 23 : INT_MAX, c == 'H' ? 2 : 4);
510
511 if (val == -1)
512 return NULL;
513 dt->tm_hour = val;
514 break;
515 case 'M':
516 val = date_get_num(&p, 0, 59, 2);
517 if (val == -1)
518 return NULL;
519 dt->tm_min = val;
520 break;
521 case 'S':
522 val = date_get_num(&p, 0, 59, 2);
523 if (val == -1)
524 return NULL;
525 dt->tm_sec = val;
526 break;
527 case 'Y':
528 val = date_get_num(&p, 0, 9999, 4);
529 if (val == -1)
530 return NULL;
531 dt->tm_year = val - 1900;
532 break;
533 case 'm':
534 val = date_get_num(&p, 1, 12, 2);
535 if (val == -1)
536 return NULL;
537 dt->tm_mon = val - 1;
538 break;
539 case 'd':
540 val = date_get_num(&p, 1, 31, 2);
541 if (val == -1)
542 return NULL;
543 dt->tm_mday = val;
544 break;
545 case 'T':
546 p = av_small_strptime(p, "%H:%M:%S", dt);
547 if (!p)
548 return NULL;
549 break;
550 case 'b':
551 case 'B':
552 case 'h':
553 val = date_get_month(&p);
554 if (val == -1)
555 return NULL;
556 dt->tm_mon = val;
557 break;
558 case '%':
559 if (*p++ != '%')
560 return NULL;
561 break;
562 default:
563 return NULL;
564 }
565 }
566
567 return (char*)p;
568 }
569
av_timegm(struct tm *tm)570 time_t av_timegm(struct tm *tm)
571 {
572 time_t t;
573
574 int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
575
576 if (m < 3) {
577 m += 12;
578 y--;
579 }
580
581 t = 86400LL *
582 (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + y / 400 - 719469);
583
584 t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
585
586 return t;
587 }
588
av_parse_time(int64_t *timeval, const char *timestr, int duration)589 int av_parse_time(int64_t *timeval, const char *timestr, int duration)
590 {
591 const char *p, *q;
592 int64_t t, now64;
593 time_t now;
594 struct tm dt = { 0 }, tmbuf;
595 int today = 0, negative = 0, microseconds = 0, suffix = 1000000;
596 int i;
597 static const char * const date_fmt[] = {
598 "%Y - %m - %d",
599 "%Y%m%d",
600 };
601 static const char * const time_fmt[] = {
602 "%H:%M:%S",
603 "%H%M%S",
604 };
605 static const char * const tz_fmt[] = {
606 "%H:%M",
607 "%H%M",
608 "%H",
609 };
610
611 p = timestr;
612 q = NULL;
613 *timeval = INT64_MIN;
614 if (!duration) {
615 now64 = av_gettime();
616 now = now64 / 1000000;
617
618 if (!av_strcasecmp(timestr, "now")) {
619 *timeval = now64;
620 return 0;
621 }
622
623 /* parse the year-month-day part */
624 for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) {
625 q = av_small_strptime(p, date_fmt[i], &dt);
626 if (q)
627 break;
628 }
629
630 /* if the year-month-day part is missing, then take the
631 * current year-month-day time */
632 if (!q) {
633 today = 1;
634 q = p;
635 }
636 p = q;
637
638 if (*p == 'T' || *p == 't')
639 p++;
640 else
641 while (av_isspace(*p))
642 p++;
643
644 /* parse the hour-minute-second part */
645 for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) {
646 q = av_small_strptime(p, time_fmt[i], &dt);
647 if (q)
648 break;
649 }
650 } else {
651 /* parse timestr as a duration */
652 if (p[0] == '-') {
653 negative = 1;
654 ++p;
655 }
656 /* parse timestr as HH:MM:SS */
657 q = av_small_strptime(p, "%J:%M:%S", &dt);
658 if (!q) {
659 /* parse timestr as MM:SS */
660 q = av_small_strptime(p, "%M:%S", &dt);
661 dt.tm_hour = 0;
662 }
663 if (!q) {
664 char *o;
665 /* parse timestr as S+ */
666 errno = 0;
667 t = strtoll(p, &o, 10);
668 if (o == p) /* the parsing didn't succeed */
669 return AVERROR(EINVAL);
670 if (errno == ERANGE)
671 return AVERROR(ERANGE);
672 q = o;
673 } else {
674 t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
675 }
676 }
677
678 /* Now we have all the fields that we can get */
679 if (!q)
680 return AVERROR(EINVAL);
681
682 /* parse the .m... part */
683 if (*q == '.') {
684 int n;
685 q++;
686 for (n = 100000; n >= 1; n /= 10, q++) {
687 if (!av_isdigit(*q))
688 break;
689 microseconds += n * (*q - '0');
690 }
691 while (av_isdigit(*q))
692 q++;
693 }
694
695 if (duration) {
696 if (q[0] == 'm' && q[1] == 's') {
697 suffix = 1000;
698 microseconds /= 1000;
699 q += 2;
700 } else if (q[0] == 'u' && q[1] == 's') {
701 suffix = 1;
702 microseconds = 0;
703 q += 2;
704 } else if (*q == 's')
705 q++;
706 } else {
707 int is_utc = *q == 'Z' || *q == 'z';
708 int tzoffset = 0;
709 q += is_utc;
710 if (!today && !is_utc && (*q == '+' || *q == '-')) {
711 struct tm tz = { 0 };
712 int sign = (*q == '+' ? -1 : 1);
713 q++;
714 p = q;
715 for (i = 0; i < FF_ARRAY_ELEMS(tz_fmt); i++) {
716 q = av_small_strptime(p, tz_fmt[i], &tz);
717 if (q)
718 break;
719 }
720 if (!q)
721 return AVERROR(EINVAL);
722 tzoffset = sign * (tz.tm_hour * 60 + tz.tm_min) * 60;
723 is_utc = 1;
724 }
725 if (today) { /* fill in today's date */
726 struct tm dt2 = is_utc ? *gmtime_r(&now, &tmbuf) : *localtime_r(&now, &tmbuf);
727 dt2.tm_hour = dt.tm_hour;
728 dt2.tm_min = dt.tm_min;
729 dt2.tm_sec = dt.tm_sec;
730 dt = dt2;
731 }
732 dt.tm_isdst = is_utc ? 0 : -1;
733 t = is_utc ? av_timegm(&dt) : mktime(&dt);
734 t += tzoffset;
735 }
736
737 /* Check that we are at the end of the string */
738 if (*q)
739 return AVERROR(EINVAL);
740
741 if (INT64_MAX / suffix < t || t < INT64_MIN / suffix)
742 return AVERROR(ERANGE);
743 t *= suffix;
744 if (INT64_MAX - microseconds < t)
745 return AVERROR(ERANGE);
746 t += microseconds;
747 if (t == INT64_MIN && negative)
748 return AVERROR(ERANGE);
749 *timeval = negative ? -t : t;
750 return 0;
751 }
752
av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)753 int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
754 {
755 const char *p;
756 char tag[128], *q;
757
758 p = info;
759 if (*p == '?')
760 p++;
761 for(;;) {
762 q = tag;
763 while (*p != '\0' && *p != '=' && *p != '&') {
764 if ((q - tag) < sizeof(tag) - 1)
765 *q++ = *p;
766 p++;
767 }
768 *q = '\0';
769 q = arg;
770 if (*p == '=') {
771 p++;
772 while (*p != '&' && *p != '\0') {
773 if ((q - arg) < arg_size - 1) {
774 if (*p == '+')
775 *q++ = ' ';
776 else
777 *q++ = *p;
778 }
779 p++;
780 }
781 }
782 *q = '\0';
783 if (!strcmp(tag, tag1))
784 return 1;
785 if (*p != '&')
786 break;
787 p++;
788 }
789 return 0;
790 }
791