added CONFIG_AC3, CONFIG_MPGLIB, CONFIG_DECODERS and CONFIG_ENCODERS (Arpi: don't...
[libav.git] / libav / utils.c
CommitLineData
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1/*
2 * Various utilities for ffmpeg system
3 * Copyright (c) 2000,2001 Gerard Lantau
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19#include <stdlib.h>
20#include <stdio.h>
21#include <string.h>
22#include <unistd.h>
23#include <fcntl.h>
24#include <errno.h>
25#include <sys/time.h>
26#include <time.h>
27
28#include "avformat.h"
29
30AVFormat *first_format;
31
32void register_avformat(AVFormat *format)
33{
34 AVFormat **p;
35 p = &first_format;
36 while (*p != NULL) p = &(*p)->next;
37 *p = format;
38 format->next = NULL;
39}
40
41int match_ext(const char *filename, const char *extensions)
42{
43 const char *ext, *p;
44 char ext1[32], *q;
45
46 ext = strrchr(filename, '.');
47 if (ext) {
48 ext++;
49 p = extensions;
50 for(;;) {
51 q = ext1;
52 while (*p != '\0' && *p != ',')
53 *q++ = *p++;
54 *q = '\0';
55 if (!strcasecmp(ext1, ext))
56 return 1;
57 if (*p == '\0')
58 break;
59 p++;
60 }
61 }
62 return 0;
63}
64
65AVFormat *guess_format(const char *short_name, const char *filename, const char *mime_type)
66{
67 AVFormat *fmt, *fmt_found;
68 int score_max, score;
69
70 /* find the proper file type */
71 fmt_found = NULL;
72 score_max = 0;
73 fmt = first_format;
74 while (fmt != NULL) {
75 score = 0;
76 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
77 score += 100;
78 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
79 score += 10;
80 if (filename && fmt->extensions &&
81 match_ext(filename, fmt->extensions)) {
82 score += 5;
83 }
84 if (score > score_max) {
85 score_max = score;
86 fmt_found = fmt;
87 }
88 fmt = fmt->next;
89 }
90 return fmt_found;
91}
92
93/* return TRUE if val is a prefix of str. If it returns TRUE, ptr is
94 set to the next character in 'str' after the prefix */
95int strstart(const char *str, const char *val, const char **ptr)
96{
97 const char *p, *q;
98 p = str;
99 q = val;
100 while (*q != '\0') {
101 if (*p != *q)
102 return 0;
103 p++;
104 q++;
105 }
106 if (ptr)
107 *ptr = p;
108 return 1;
109}
110
111void nstrcpy(char *buf, int buf_size, const char *str)
112{
113 int c;
114 char *q = buf;
115
116 for(;;) {
117 c = *str++;
118 if (c == 0 || q >= buf + buf_size - 1)
119 break;
120 *q++ = c;
121 }
122 *q = '\0';
123}
124
125void register_all(void)
126{
127 avcodec_init();
128 avcodec_register_all();
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129
130 register_avformat(&mp2_format);
131 register_avformat(&ac3_format);
132 register_avformat(&mpeg_mux_format);
133 register_avformat(&mpeg1video_format);
134 register_avformat(&h263_format);
135 register_avformat(&rm_format);
136 register_avformat(&asf_format);
137 register_avformat(&avi_format);
138 register_avformat(&mpjpeg_format);
139 register_avformat(&jpeg_format);
140 register_avformat(&swf_format);
141 register_avformat(&wav_format);
142 register_avformat(&pcm_format);
143 register_avformat(&rawvideo_format);
144 register_avformat(&ffm_format);
145 register_avformat(&pgm_format);
146 register_avformat(&pgmyuv_format);
147 register_avformat(&imgyuv_format);
148 register_avformat(&pgmpipe_format);
149
150 register_protocol(&file_protocol);
151 register_protocol(&pipe_protocol);
152 register_protocol(&audio_protocol);
153 register_protocol(&video_protocol);
154 register_protocol(&udp_protocol);
155 register_protocol(&http_protocol);
156}
157
158/* memory handling */
159
160int av_new_packet(AVPacket *pkt, int size)
161{
162 pkt->data = malloc(size);
163 if (!pkt->data)
164 return -ENOMEM;
165 pkt->size = size;
166 /* sane state */
167 pkt->pts = 0;
168 pkt->stream_index = 0;
169 pkt->flags = 0;
170 return 0;
171}
172
173void av_free_packet(AVPacket *pkt)
174{
175 free(pkt->data);
176 /* fail safe */
177 pkt->data = NULL;
178 pkt->size = 0;
179}
180
181/* fifo handling */
182
183int fifo_init(FifoBuffer *f, int size)
184{
185 f->buffer = malloc(size);
186 if (!f->buffer)
187 return -1;
188 f->end = f->buffer + size;
189 f->wptr = f->rptr = f->buffer;
190 return 0;
191}
192
193void fifo_free(FifoBuffer *f)
194{
195 free(f->buffer);
196}
197
198int fifo_size(FifoBuffer *f, UINT8 *rptr)
199{
200 int size;
201
202 if (f->wptr >= rptr) {
203 size = f->wptr - rptr;
204 } else {
205 size = (f->end - rptr) + (f->wptr - f->buffer);
206 }
207 return size;
208}
209
210/* get data from the fifo (return -1 if not enough data) */
211int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr)
212{
213 UINT8 *rptr = *rptr_ptr;
214 int size, len;
215
216 if (f->wptr >= rptr) {
217 size = f->wptr - rptr;
218 } else {
219 size = (f->end - rptr) + (f->wptr - f->buffer);
220 }
221
222 if (size < buf_size)
223 return -1;
224 while (buf_size > 0) {
225 len = f->end - rptr;
226 if (len > buf_size)
227 len = buf_size;
228 memcpy(buf, rptr, len);
229 buf += len;
230 rptr += len;
231 if (rptr >= f->end)
232 rptr = f->buffer;
233 buf_size -= len;
234 }
235 *rptr_ptr = rptr;
236 return 0;
237}
238
239void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr)
240{
241 int len;
242 UINT8 *wptr;
243 wptr = *wptr_ptr;
244 while (size > 0) {
245 len = f->end - wptr;
246 if (len > size)
247 len = size;
248 memcpy(wptr, buf, len);
249 wptr += len;
250 if (wptr >= f->end)
251 wptr = f->buffer;
252 buf += len;
253 size -= len;
254 }
255 *wptr_ptr = wptr;
256}
257
258/* media file handling */
259
260AVFormatContext *av_open_input_file(const char *filename, int buf_size)
261{
262 AVFormatParameters params, *ap;
263 AVFormat *fmt;
264 AVFormatContext *ic = NULL;
265 URLFormat url_format;
266 int err;
267
268 ic = av_mallocz(sizeof(AVFormatContext));
269 if (!ic)
270 goto fail;
271 if (url_fopen(&ic->pb, filename, URL_RDONLY) < 0)
272 goto fail;
273
274 if (buf_size > 0) {
275 url_setbufsize(&ic->pb, buf_size);
276 }
277
278 /* find format */
279 err = url_getformat(url_fileno(&ic->pb), &url_format);
280 if (err >= 0) {
281 fmt = guess_format(url_format.format_name, NULL, NULL);
282 ap = &params;
283 ap->sample_rate = url_format.sample_rate;
284 ap->frame_rate = url_format.frame_rate;
285 ap->channels = url_format.channels;
286 ap->width = url_format.width;
287 ap->height = url_format.height;
288 ap->pix_fmt = url_format.pix_fmt;
289 } else {
290 fmt = guess_format(NULL, filename, NULL);
291 ap = NULL;
292 }
293 if (!fmt || !fmt->read_header) {
294 return NULL;
295 }
296 ic->format = fmt;
297
298 err = ic->format->read_header(ic, ap);
299 if (err < 0) {
300 url_fclose(&ic->pb);
301 goto fail;
302 }
303
304 return ic;
305
306 fail:
307 if (ic)
308 free(ic);
309 return NULL;
310}
311
312int av_read_packet(AVFormatContext *s, AVPacket *pkt)
313{
314 AVPacketList *pktl;
315
316 pktl = s->packet_buffer;
317 if (pktl) {
318 /* read packet from packet buffer, if there is data */
319 *pkt = pktl->pkt;
320 s->packet_buffer = pktl->next;
321 free(pktl);
322 return 0;
323 } else {
324 return s->format->read_packet(s, pkt);
325 }
326}
327
328void av_close_input_file(AVFormatContext *s)
329{
330 int i;
331
332 if (s->format->read_close)
333 s->format->read_close(s);
334 for(i=0;i<s->nb_streams;i++) {
335 free(s->streams[i]);
336 }
337 if (s->packet_buffer) {
338 AVPacketList *p, *p1;
339 p = s->packet_buffer;
340 while (p != NULL) {
341 p1 = p->next;
342 av_free_packet(&p->pkt);
343 free(p);
344 p = p1;
345 }
346 s->packet_buffer = NULL;
347 }
348 url_fclose(&s->pb);
349 free(s);
350}
351
352
353int av_write_packet(AVFormatContext *s, AVPacket *pkt)
354{
355 /* XXX: currently, an emulation because internal API must change */
356 return s->format->write_packet(s, pkt->stream_index, pkt->data, pkt->size);
357}
358
359/* "user interface" functions */
360
361void dump_format(AVFormatContext *ic,
362 int index,
363 const char *url,
364 int is_output)
365{
366 int i;
367 char buf[256];
368
369 fprintf(stderr, "%s #%d, %s, %s '%s':\n",
370 is_output ? "Output" : "Input",
371 index, ic->format->name,
372 is_output ? "to" : "from", url);
373 for(i=0;i<ic->nb_streams;i++) {
374 AVStream *st = ic->streams[i];
375 avcodec_string(buf, sizeof(buf), &st->codec, is_output);
376 fprintf(stderr, " Stream #%d.%d: %s\n", index, i, buf);
377 }
378}
379
380typedef struct {
381 const char *str;
382 int width, height;
383} SizeEntry;
384
385static SizeEntry sizes[] = {
386 { "sqcif", 128, 96 },
387 { "qcif", 176, 144 },
388 { "cif", 352, 288 },
389 { "4cif", 704, 576 },
390};
391
392int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
393{
394 int i;
395 int n = sizeof(sizes) / sizeof(SizeEntry);
396 const char *p;
397 int frame_width = 0, frame_height = 0;
398
399 for(i=0;i<n;i++) {
400 if (!strcmp(sizes[i].str, str)) {
401 frame_width = sizes[i].width;
402 frame_height = sizes[i].height;
403 break;
404 }
405 }
406 if (i == n) {
407 p = str;
408 frame_width = strtol(p, (char **)&p, 10);
409 if (*p)
410 p++;
411 frame_height = strtol(p, (char **)&p, 10);
412 }
413 if (frame_width <= 0 || frame_height <= 0)
414 return -1;
415 *width_ptr = frame_width;
416 *height_ptr = frame_height;
417 return 0;
418}
419
420INT64 gettime(void)
421{
422 struct timeval tv;
423 gettimeofday(&tv,NULL);
424 return (INT64)tv.tv_sec * 1000000 + tv.tv_usec;
425}
426
427/* syntax: [YYYY-MM-DD ][[HH:]MM:]SS[.m...] . Return the date in micro seconds since 1970 */
428INT64 parse_date(const char *datestr, int duration)
429{
430 const char *p;
431 INT64 t;
432 int sec;
433
434 p = datestr;
435 if (!duration) {
436 static const UINT8 months[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
437 int year, month, day, i;
438
439 if (strlen(p) >= 5 && p[4] == '-') {
440
441 year = strtol(p, (char **)&p, 10);
442 if (*p)
443 p++;
444 month = strtol(p, (char **)&p, 10) - 1;
445 if (*p)
446 p++;
447 day = strtol(p, (char **)&p, 10) - 1;
448 if (*p)
449 p++;
450 day += (year - 1970) * 365;
451 /* if >= March, take February of current year into account too */
452 if (month >= 2)
453 year++;
454 for(i=1970;i<year;i++) {
455 if ((i % 100) == 0) {
456 if ((i % 400) == 0) day++;
457 } else if ((i % 4) == 0) {
458 day++;
459 }
460 }
461 for(i=0;i<month;i++)
462 day += months[i];
463 } else {
464 day = (time(NULL) / (3600 * 24));
465 }
466 t = day * (3600 * 24);
467 } else {
468 t = 0;
469 }
470
471 sec = 0;
472 for(;;) {
473 int val;
474 val = strtol(p, (char **)&p, 10);
475 sec = sec * 60 + val;
476 if (*p != ':')
477 break;
478 p++;
479 }
480 t = (t + sec) * 1000000;
481 if (*p == '.') {
482 int val, n;
483 p++;
484 n = strlen(p);
485 if (n > 6)
486 n = 6;
487 val = strtol(p, NULL, 10);
488 while (n < 6) {
489 val = val * 10;
490 n++;
491 }
492 t += val;
493 }
494 return t;
495}
496
497/* syntax: '?tag1=val1&tag2=val2...'. No URL decoding is done. Return
498 1 if found */
499int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
500{
501 const char *p;
502 char tag[128], *q;
503
504 p = info;
505 if (*p == '?')
506 p++;
507 for(;;) {
508 q = tag;
509 while (*p != '\0' && *p != '=' && *p != '&') {
510 if ((q - tag) < sizeof(tag) - 1)
511 *q++ = *p;
512 p++;
513 }
514 *q = '\0';
515 q = arg;
516 if (*p == '=') {
517 p++;
518 while (*p != '&' && *p != '\0') {
519 if ((q - arg) < arg_size - 1)
520 *q++ = *p;
521 p++;
522 }
523 *q = '\0';
524 }
525 if (!strcmp(tag, tag1))
526 return 1;
527 if (*p != '&')
528 break;
529 }
530 return 0;
531}
532