FFmpeg
sbgdec.c
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1 /*
2  * SBG (SBaGen) file format decoder
3  * Copyright (c) 2011 Nicolas George
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <time.h>
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/opt.h"
29 #include "avformat.h"
30 #include "internal.h"
31 
32 #define SBG_SCALE (1 << 16)
33 #define DAY (24 * 60 * 60)
34 #define DAY_TS ((int64_t)DAY * AV_TIME_BASE)
35 
36 struct sbg_demuxer {
37  AVClass *class;
41 };
42 
43 struct sbg_string {
44  char *s;
45  char *e;
46 };
47 
52 };
53 
54 struct sbg_fade {
55  int8_t in, out, slide;
56 };
57 
65 };
66 
67 /* bell: freq constant, ampl decreases exponentially, can be approx lin */
68 
69 struct sbg_timestamp {
70  int64_t t;
71  char type; /* 0 for relative, 'N' for now, 'T' for absolute */
72 };
73 
75  char *name;
76  int name_len;
78  char type; /* 'S' or 'B' */
79 };
80 
82  int carrier;
83  int beat;
84  int vol;
86  struct {
87  int l, r;
88  } ref;
89 };
90 
92  struct sbg_timestamp ts;
93  char *name;
94  int name_len;
95  int lock;
96  struct sbg_fade fade;
97 };
98 
100  int64_t ts;
103  struct sbg_fade fade;
104 };
105 
106 struct sbg_script {
112  int nb_def;
113  int nb_tseq;
115  int nb_synth;
116  int64_t start_ts;
117  int64_t end_ts;
118  int64_t opt_fade_time;
119  int64_t opt_duration;
120  char *opt_mix;
124 };
125 
126 struct sbg_parser {
127  void *log;
128  char *script, *end;
129  char *cursor;
130  struct sbg_script scs;
134  int line_no;
135  char err_msg[128];
136 };
137 
139  WS_SINE = MKTAG('S','I','N','E'),
140  WS_NOISE = MKTAG('N','O','I','S'),
141 };
142 
143 struct ws_interval {
144  int64_t ts1, ts2;
145  enum ws_interval_type type;
146  uint32_t channels;
149  uint32_t phi;
150 };
151 
152 struct ws_intervals {
154  int nb_inter;
156 };
157 
158 static void *alloc_array_elem(void **array, size_t elsize,
159  int *size, int *max_size)
160 {
161  void *ret;
162 
163  if (*size == *max_size) {
164  int m = FFMAX(32, FFMIN(*max_size, INT_MAX / 2) * 2);
165  if (*size >= m)
166  return NULL;
167  *array = av_realloc_f(*array, m, elsize);
168  if (!*array)
169  return NULL;
170  *max_size = m;
171  }
172  ret = (char *)*array + elsize * *size;
173  memset(ret, 0, elsize);
174  (*size)++;
175  return ret;
176 }
177 
178 static int str_to_time(const char *str, int64_t *rtime)
179 {
180  const char *cur = str;
181  char *end;
182  int hours, minutes;
183  double seconds = 0;
184  int64_t ts = 0;
185 
186  if (*cur < '0' || *cur > '9')
187  return 0;
188  hours = strtol(cur, &end, 10);
189  if (end == cur || *end != ':' || end[1] < '0' || end[1] > '9')
190  return 0;
191  cur = end + 1;
192  minutes = strtol(cur, &end, 10);
193  if (end == cur)
194  return 0;
195  cur = end;
196  if (*end == ':'){
197  seconds = strtod(cur + 1, &end);
198  if (end > cur + 1)
199  cur = end;
200  ts = av_clipd(seconds * AV_TIME_BASE, INT64_MIN/2, INT64_MAX/2);
201  }
202  *rtime = (hours * 3600LL + minutes * 60LL) * AV_TIME_BASE + ts;
203  return cur - str;
204 }
205 
206 static inline int is_space(char c)
207 {
208  return c == ' ' || c == '\t' || c == '\r';
209 }
210 
211 static inline int scale_double(void *log, double d, double m, int *r)
212 {
213  m *= d * SBG_SCALE;
214  if (m < INT_MIN || m >= INT_MAX) {
215  if (log)
216  av_log(log, AV_LOG_ERROR, "%g is too large\n", d);
217  return AVERROR(EDOM);
218  }
219  *r = m;
220  return 0;
221 }
222 
223 static int lex_space(struct sbg_parser *p)
224 {
225  char *c = p->cursor;
226 
227  while (p->cursor < p->end && is_space(*p->cursor))
228  p->cursor++;
229  return p->cursor > c;
230 }
231 
232 static int lex_char(struct sbg_parser *p, char c)
233 {
234  int r = p->cursor < p->end && *p->cursor == c;
235 
236  p->cursor += r;
237  return r;
238 }
239 
240 static int lex_double(struct sbg_parser *p, double *r)
241 {
242  double d;
243  char *end;
244 
245  if (p->cursor == p->end || is_space(*p->cursor) || *p->cursor == '\n')
246  return 0;
247  d = strtod(p->cursor, &end);
248  if (end > p->cursor) {
249  *r = d;
250  p->cursor = end;
251  return 1;
252  }
253  return 0;
254 }
255 
256 static int lex_fixed(struct sbg_parser *p, const char *t, int l)
257 {
258  if (p->end - p->cursor < l || memcmp(p->cursor, t, l))
259  return 0;
260  p->cursor += l;
261  return 1;
262 }
263 
264 static int lex_line_end(struct sbg_parser *p)
265 {
266  if (p->cursor < p->end && *p->cursor == '#') {
267  p->cursor++;
268  while (p->cursor < p->end && *p->cursor != '\n')
269  p->cursor++;
270  }
271  if (p->cursor == p->end)
272  /* simulate final LF for files lacking it */
273  return 1;
274  if (*p->cursor != '\n')
275  return 0;
276  p->cursor++;
277  p->line_no++;
278  lex_space(p);
279  return 1;
280 }
281 
282 static int lex_wsword(struct sbg_parser *p, struct sbg_string *rs)
283 {
284  char *s = p->cursor, *c = s;
285 
286  if (s == p->end || *s == '\n')
287  return 0;
288  while (c < p->end && *c != '\n' && !is_space(*c))
289  c++;
290  rs->s = s;
291  rs->e = p->cursor = c;
292  lex_space(p);
293  return 1;
294 }
295 
296 static int lex_name(struct sbg_parser *p, struct sbg_string *rs)
297 {
298  char *s = p->cursor, *c = s;
299 
300  while (c < p->end && ((*c >= 'a' && *c <= 'z') || (*c >= 'A' && *c <= 'Z')
301  || (*c >= '0' && *c <= '9') || *c == '_' || *c == '-'))
302  c++;
303  if (c == s)
304  return 0;
305  rs->s = s;
306  rs->e = p->cursor = c;
307  return 1;
308 }
309 
310 static int lex_time(struct sbg_parser *p, int64_t *rt)
311 {
312  int r = str_to_time(p->cursor, rt);
313  p->cursor += r;
314  return r > 0;
315 }
316 
317 #define FORWARD_ERROR(c) \
318  do { \
319  int errcode = c; \
320  if (errcode <= 0) \
321  return errcode ? errcode : AVERROR_INVALIDDATA; \
322  } while (0)
323 
324 static int parse_immediate(struct sbg_parser *p)
325 {
326  snprintf(p->err_msg, sizeof(p->err_msg),
327  "immediate sequences not yet implemented");
328  return AVERROR_PATCHWELCOME;
329 }
330 
331 static int parse_preprogrammed(struct sbg_parser *p)
332 {
333  snprintf(p->err_msg, sizeof(p->err_msg),
334  "preprogrammed sequences not yet implemented");
335  return AVERROR_PATCHWELCOME;
336 }
337 
338 static int parse_optarg(struct sbg_parser *p, char o, struct sbg_string *r)
339 {
340  if (!lex_wsword(p, r)) {
341  snprintf(p->err_msg, sizeof(p->err_msg),
342  "option '%c' requires an argument", o);
343  return AVERROR_INVALIDDATA;
344  }
345  return 1;
346 }
347 
348 static int parse_options(struct sbg_parser *p)
349 {
350  struct sbg_string ostr, oarg;
351  char mode = 0;
352  int r;
353  char *tptr;
354  double v;
355 
356  if (p->cursor == p->end || *p->cursor != '-')
357  return 0;
358  while (lex_char(p, '-') && lex_wsword(p, &ostr)) {
359  for (; ostr.s < ostr.e; ostr.s++) {
360  char opt = *ostr.s;
361  switch (opt) {
362  case 'S':
363  p->scs.opt_start_at_first = 1;
364  break;
365  case 'E':
366  p->scs.opt_end_at_last = 1;
367  break;
368  case 'i':
369  mode = 'i';
370  break;
371  case 'p':
372  mode = 'p';
373  break;
374  case 'F':
375  FORWARD_ERROR(parse_optarg(p, opt, &oarg));
376  v = strtod(oarg.s, &tptr);
377  if (oarg.e != tptr) {
378  snprintf(p->err_msg, sizeof(p->err_msg),
379  "syntax error for option -F");
380  return AVERROR_INVALIDDATA;
381  }
382  p->scs.opt_fade_time = v * AV_TIME_BASE / 1000;
383  break;
384  case 'L':
385  FORWARD_ERROR(parse_optarg(p, opt, &oarg));
386  r = str_to_time(oarg.s, &p->scs.opt_duration);
387  if (oarg.e != oarg.s + r) {
388  snprintf(p->err_msg, sizeof(p->err_msg),
389  "syntax error for option -L");
390  return AVERROR_INVALIDDATA;
391  }
392  break;
393  case 'T':
394  FORWARD_ERROR(parse_optarg(p, opt, &oarg));
395  r = str_to_time(oarg.s, &p->scs.start_ts);
396  if (oarg.e != oarg.s + r) {
397  snprintf(p->err_msg, sizeof(p->err_msg),
398  "syntax error for option -T");
399  return AVERROR_INVALIDDATA;
400  }
401  break;
402  case 'm':
403  FORWARD_ERROR(parse_optarg(p, opt, &oarg));
404  tptr = av_malloc(oarg.e - oarg.s + 1);
405  if (!tptr)
406  return AVERROR(ENOMEM);
407  memcpy(tptr, oarg.s, oarg.e - oarg.s);
408  tptr[oarg.e - oarg.s] = 0;
409  av_free(p->scs.opt_mix);
410  p->scs.opt_mix = tptr;
411  break;
412  case 'q':
413  FORWARD_ERROR(parse_optarg(p, opt, &oarg));
414  v = strtod(oarg.s, &tptr);
415  if (oarg.e != tptr) {
416  snprintf(p->err_msg, sizeof(p->err_msg),
417  "syntax error for option -q");
418  return AVERROR_INVALIDDATA;
419  }
420  if (v != 1) {
421  snprintf(p->err_msg, sizeof(p->err_msg),
422  "speed factor other than 1 not supported");
423  return AVERROR_PATCHWELCOME;
424  }
425  break;
426  case 'r':
427  FORWARD_ERROR(parse_optarg(p, opt, &oarg));
428  r = strtol(oarg.s, &tptr, 10);
429  if (oarg.e != tptr) {
430  snprintf(p->err_msg, sizeof(p->err_msg),
431  "syntax error for option -r");
432  return AVERROR_INVALIDDATA;
433  }
434  if (r < 40) {
435  snprintf(p->err_msg, sizeof(p->err_msg),
436  "invalid sample rate");
437  return AVERROR_PATCHWELCOME;
438  }
439  p->scs.sample_rate = r;
440  break;
441  default:
442  snprintf(p->err_msg, sizeof(p->err_msg),
443  "unknown option: '%c'", *ostr.s);
444  return AVERROR_INVALIDDATA;
445  }
446  }
447  }
448  switch (mode) {
449  case 'i':
450  return parse_immediate(p);
451  case 'p':
452  return parse_preprogrammed(p);
453  case 0:
454  if (!lex_line_end(p))
455  return AVERROR_INVALIDDATA;
456  return 1;
457  }
458  return AVERROR_BUG;
459 }
460 
461 static int parse_timestamp(struct sbg_parser *p,
462  struct sbg_timestamp *rts, int64_t *rrel)
463 {
464  int64_t abs = 0, rel = 0, dt;
465  char type = 0;
466  int r;
467 
468  if (lex_fixed(p, "NOW", 3)) {
469  type = 'N';
470  r = 1;
471  } else {
472  r = lex_time(p, &abs);
473  if (r)
474  type = 'T';
475  }
476  while (lex_char(p, '+')) {
477  if (!lex_time(p, &dt))
478  return AVERROR_INVALIDDATA;
479  rel += dt;
480  r = 1;
481  }
482  if (r) {
483  if (!lex_space(p))
484  return AVERROR_INVALIDDATA;
485  rts->type = type;
486  rts->t = abs;
487  *rrel = rel;
488  }
489  return r;
490 }
491 
492 static int parse_fade(struct sbg_parser *p, struct sbg_fade *fr)
493 {
494  struct sbg_fade f = {0};
495 
496  if (lex_char(p, '<'))
497  f.in = SBG_FADE_SILENCE;
498  else if (lex_char(p, '-'))
499  f.in = SBG_FADE_SAME;
500  else if (lex_char(p, '='))
501  f.in = SBG_FADE_ADAPT;
502  else
503  return 0;
504  if (lex_char(p, '>'))
505  f.out = SBG_FADE_SILENCE;
506  else if (lex_char(p, '-'))
507  f.out = SBG_FADE_SAME;
508  else if (lex_char(p, '='))
509  f.out = SBG_FADE_ADAPT;
510  else
511  return AVERROR_INVALIDDATA;
512  *fr = f;
513  return 1;
514 }
515 
516 static int parse_time_sequence(struct sbg_parser *p, int inblock)
517 {
518  struct sbg_timestamp ts;
519  int64_t rel_ts;
520  int r;
521  struct sbg_fade fade = { SBG_FADE_SAME, SBG_FADE_SAME, 0 };
522  struct sbg_string name;
523  struct sbg_script_tseq *tseq;
524 
525  r = parse_timestamp(p, &ts, &rel_ts);
526  if (!r)
527  return 0;
528  if (r < 0)
529  return r;
530  if (ts.type) {
531  if (inblock)
532  return AVERROR_INVALIDDATA;
533  p->current_time.type = ts.type;
534  p->current_time.t = ts.t;
535  } else if(!inblock && !p->current_time.type) {
536  snprintf(p->err_msg, sizeof(p->err_msg),
537  "relative time without previous absolute time");
538  return AVERROR_INVALIDDATA;
539  }
540  ts.type = p->current_time.type;
541  ts.t = p->current_time.t + rel_ts;
542  r = parse_fade(p, &fade);
543  if (r < 0)
544  return r;
545  lex_space(p);
546  if (!lex_name(p, &name))
547  return AVERROR_INVALIDDATA;
548  lex_space(p);
549  if (lex_fixed(p, "->", 2)) {
550  fade.slide = SBG_FADE_ADAPT;
551  lex_space(p);
552  }
553  if (!lex_line_end(p))
554  return AVERROR_INVALIDDATA;
555  tseq = inblock ?
556  alloc_array_elem((void **)&p->scs.block_tseq, sizeof(*tseq),
557  &p->nb_block_tseq, &p->nb_block_tseq_max) :
558  alloc_array_elem((void **)&p->scs.tseq, sizeof(*tseq),
559  &p->scs.nb_tseq, &p->nb_tseq_max);
560  if (!tseq)
561  return AVERROR(ENOMEM);
562  tseq->ts = ts;
563  tseq->name = name.s;
564  tseq->name_len = name.e - name.s;
565  tseq->fade = fade;
566  return 1;
567 }
568 
569 static int parse_wave_def(struct sbg_parser *p, int wavenum)
570 {
571  snprintf(p->err_msg, sizeof(p->err_msg),
572  "waveform definitions not yet implemented");
573  return AVERROR_PATCHWELCOME;
574 }
575 
576 static int parse_block_def(struct sbg_parser *p,
577  struct sbg_script_definition *def)
578 {
579  int r, tseq;
580 
581  lex_space(p);
582  if (!lex_line_end(p))
583  return AVERROR_INVALIDDATA;
584  tseq = p->nb_block_tseq;
585  while (1) {
586  r = parse_time_sequence(p, 1);
587  if (r < 0)
588  return r;
589  if (!r)
590  break;
591  }
592  if (!lex_char(p, '}'))
593  return AVERROR_INVALIDDATA;
594  lex_space(p);
595  if (!lex_line_end(p))
596  return AVERROR_INVALIDDATA;
597  def->type = 'B';
598  def->elements = tseq;
599  def->nb_elements = p->nb_block_tseq - tseq;
600  if (!def->nb_elements)
601  return AVERROR_INVALIDDATA;
602  return 1;
603 }
604 
605 static int parse_volume(struct sbg_parser *p, int *vol)
606 {
607  double v;
608 
609  if (!lex_char(p, '/'))
610  return 0;
611  if (!lex_double(p, &v))
612  return AVERROR_INVALIDDATA;
613  if (scale_double(p->log, v, 0.01, vol))
614  return AVERROR(ERANGE);
615  return 1;
616 }
617 
619  struct sbg_script_synth *synth)
620 {
621  double carrierf, beatf;
622  int carrier, beat, vol;
623 
624  if (!lex_double(p, &carrierf))
625  return 0;
626  if (!lex_double(p, &beatf))
627  beatf = 0;
628  FORWARD_ERROR(parse_volume(p, &vol));
629  if (scale_double(p->log, carrierf, 1, &carrier) < 0 ||
630  scale_double(p->log, beatf, 1, &beat) < 0)
631  return AVERROR(EDOM);
632  synth->type = SBG_TYPE_SINE;
633  synth->carrier = carrier;
634  synth->beat = beat;
635  synth->vol = vol;
636  return 1;
637 }
638 
640  struct sbg_script_synth *synth)
641 {
642  int vol;
643 
644  if (!lex_fixed(p, "pink", 4))
645  return 0;
646  FORWARD_ERROR(parse_volume(p, &vol));
647  synth->type = SBG_TYPE_NOISE;
648  synth->vol = vol;
649  return 1;
650 }
651 
653  struct sbg_script_synth *synth)
654 {
655  double carrierf;
656  int carrier, vol;
657 
658  if (!lex_fixed(p, "bell", 4))
659  return 0;
660  if (!lex_double(p, &carrierf))
661  return AVERROR_INVALIDDATA;
662  FORWARD_ERROR(parse_volume(p, &vol));
663  if (scale_double(p->log, carrierf, 1, &carrier) < 0)
664  return AVERROR(EDOM);
665  synth->type = SBG_TYPE_BELL;
666  synth->carrier = carrier;
667  synth->vol = vol;
668  return 1;
669 }
670 
671 static int parse_synth_channel_mix(struct sbg_parser *p,
672  struct sbg_script_synth *synth)
673 {
674  int vol;
675 
676  if (!lex_fixed(p, "mix", 3))
677  return 0;
678  FORWARD_ERROR(parse_volume(p, &vol));
679  synth->type = SBG_TYPE_MIX;
680  synth->vol = vol;
681  return 1;
682 }
683 
685  struct sbg_script_synth *synth)
686 {
687  double carrierf, beatf;
688  int carrier, beat, vol;
689 
690  if (!lex_fixed(p, "spin:", 5))
691  return 0;
692  if (!lex_double(p, &carrierf))
693  return AVERROR_INVALIDDATA;
694  if (!lex_double(p, &beatf))
695  return AVERROR_INVALIDDATA;
696  FORWARD_ERROR(parse_volume(p, &vol));
697  if (scale_double(p->log, carrierf, 1, &carrier) < 0 ||
698  scale_double(p->log, beatf, 1, &beat) < 0)
699  return AVERROR(EDOM);
700  synth->type = SBG_TYPE_SPIN;
701  synth->carrier = carrier;
702  synth->beat = beat;
703  synth->vol = vol;
704  return 1;
705 }
706 
707 static int parse_synth_channel(struct sbg_parser *p)
708 {
709  int r;
710  struct sbg_script_synth *synth;
711 
712  synth = alloc_array_elem((void **)&p->scs.synth, sizeof(*synth),
713  &p->scs.nb_synth, &p->nb_synth_max);
714  if (!synth)
715  return AVERROR(ENOMEM);
716  r = lex_char(p, '-');
717  if (!r)
718  r = parse_synth_channel_pink(p, synth);
719  if (!r)
720  r = parse_synth_channel_bell(p, synth);
721  if (!r)
722  r = parse_synth_channel_mix(p, synth);
723  if (!r)
724  r = parse_synth_channel_spin(p, synth);
725  /* Unimplemented: wave%d:%f%f/vol (carrier, beat) */
726  if (!r)
727  r = parse_synth_channel_sine(p, synth);
728  if (r <= 0)
729  p->scs.nb_synth--;
730  return r;
731 }
732 
733 static int parse_synth_def(struct sbg_parser *p,
734  struct sbg_script_definition *def)
735 {
736  int r, synth;
737 
738  synth = p->scs.nb_synth;
739  while (1) {
740  r = parse_synth_channel(p);
741  if (r < 0)
742  return r;
743  if (!r || !lex_space(p))
744  break;
745  }
746  lex_space(p);
747  if (synth == p->scs.nb_synth)
748  return AVERROR_INVALIDDATA;
749  if (!lex_line_end(p))
750  return AVERROR_INVALIDDATA;
751  def->type = 'S';
752  def->elements = synth;
753  def->nb_elements = p->scs.nb_synth - synth;
754  return 1;
755 }
756 
757 static int parse_named_def(struct sbg_parser *p)
758 {
759  char *cursor_save = p->cursor;
760  struct sbg_string name;
761  struct sbg_script_definition *def;
762 
763  if (!lex_name(p, &name) || !lex_char(p, ':') || !lex_space(p)) {
764  p->cursor = cursor_save;
765  return 0;
766  }
767  if (name.e - name.s == 6 && !memcmp(name.s, "wave", 4) &&
768  name.s[4] >= '0' && name.s[4] <= '9' &&
769  name.s[5] >= '0' && name.s[5] <= '9') {
770  int wavenum = (name.s[4] - '0') * 10 + (name.s[5] - '0');
771  return parse_wave_def(p, wavenum);
772  }
773  def = alloc_array_elem((void **)&p->scs.def, sizeof(*def),
774  &p->scs.nb_def, &p->nb_def_max);
775  if (!def)
776  return AVERROR(ENOMEM);
777  def->name = name.s;
778  def->name_len = name.e - name.s;
779  if (lex_char(p, '{'))
780  return parse_block_def(p, def);
781  return parse_synth_def(p, def);
782 }
783 
784 static void free_script(struct sbg_script *s)
785 {
786  av_freep(&s->def);
787  av_freep(&s->synth);
788  av_freep(&s->tseq);
789  av_freep(&s->block_tseq);
790  av_freep(&s->events);
791  av_freep(&s->opt_mix);
792 }
793 
794 static int parse_script(void *log, char *script, int script_len,
795  struct sbg_script *rscript)
796 {
797  struct sbg_parser sp = {
798  .log = log,
799  .script = script,
800  .end = script + script_len,
801  .cursor = script,
802  .line_no = 1,
803  .err_msg = "",
804  .scs = {
805  /* default values */
806  .start_ts = AV_NOPTS_VALUE,
807  .sample_rate = 44100,
808  .opt_fade_time = 60 * AV_TIME_BASE,
809  },
810  };
811  int r;
812 
813  lex_space(&sp);
814  while (sp.cursor < sp.end) {
815  r = parse_options(&sp);
816  if (r < 0)
817  goto fail;
818  if (!r && !lex_line_end(&sp))
819  break;
820  }
821  while (sp.cursor < sp.end) {
822  r = parse_named_def(&sp);
823  if (!r)
824  r = parse_time_sequence(&sp, 0);
825  if (!r)
827  if (r < 0)
828  goto fail;
829  }
830  *rscript = sp.scs;
831  return 1;
832 fail:
833  free_script(&sp.scs);
834  if (!*sp.err_msg)
835  if (r == AVERROR_INVALIDDATA)
836  snprintf(sp.err_msg, sizeof(sp.err_msg), "syntax error");
837  if (log && *sp.err_msg) {
838  const char *ctx = sp.cursor;
839  const char *ectx = av_x_if_null(memchr(ctx, '\n', sp.end - sp.cursor),
840  sp.end);
841  int lctx = ectx - ctx;
842  const char *quote = "\"";
843  if (lctx > 0 && ctx[lctx - 1] == '\r')
844  lctx--;
845  if (lctx == 0) {
846  ctx = "the end of line";
847  lctx = strlen(ctx);
848  quote = "";
849  }
850  av_log(log, AV_LOG_ERROR, "Error line %d: %s near %s%.*s%s.\n",
851  sp.line_no, sp.err_msg, quote, lctx, ctx, quote);
852  }
853  return r;
854 }
855 
856 static int read_whole_file(AVIOContext *io, int max_size, char **rbuf)
857 {
858  char *buf = NULL;
859  int size = 0, bufsize = 0, r;
860 
861  while (1) {
862  if (bufsize - size < 1024) {
863  bufsize = FFMIN(FFMAX(2 * bufsize, 8192), max_size);
864  if (bufsize - size < 2) {
865  size = AVERROR(EFBIG);
866  goto fail;
867  }
868  buf = av_realloc_f(buf, bufsize, 1);
869  if (!buf) {
870  size = AVERROR(ENOMEM);
871  goto fail;
872  }
873  }
874  r = avio_read(io, buf, bufsize - size - 1);
875  if (r == AVERROR_EOF)
876  break;
877  if (r < 0)
878  goto fail;
879  size += r;
880  }
881  buf[size] = 0;
882  *rbuf = buf;
883  return size;
884 fail:
885  av_free(buf);
886  return size;
887 }
888 
889 static void expand_timestamps(void *log, struct sbg_script *s)
890 {
891  int i, nb_rel = 0;
892  int64_t now, cur_ts, delta = 0;
893 
894  for (i = 0; i < s->nb_tseq; i++)
895  nb_rel += s->tseq[i].ts.type == 'N';
896  if (nb_rel == s->nb_tseq) {
897  /* All ts are relative to NOW: consider NOW = 0 */
898  now = 0;
899  if (s->start_ts != AV_NOPTS_VALUE)
901  "Start time ignored in a purely relative script.\n");
902  } else if (nb_rel == 0 && s->start_ts != AV_NOPTS_VALUE ||
903  s->opt_start_at_first) {
904  /* All ts are absolute and start time is specified */
905  if (s->start_ts == AV_NOPTS_VALUE)
906  s->start_ts = s->tseq[0].ts.t;
907  now = s->start_ts;
908  } else {
909  /* Mixed relative/absolute ts: expand */
910  time_t now0;
911  struct tm *tm, tmpbuf;
912 
913  av_log(log, AV_LOG_WARNING,
914  "Scripts with mixed absolute and relative timestamps can give "
915  "unexpected results (pause, seeking, time zone change).\n");
916 #undef time
917  time(&now0);
918  tm = localtime_r(&now0, &tmpbuf);
919  now = tm ? tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec :
920  now0 % DAY;
921  av_log(log, AV_LOG_INFO, "Using %02d:%02d:%02d as NOW.\n",
922  (int)(now / 3600), (int)(now / 60) % 60, (int)now % 60);
923  now *= AV_TIME_BASE;
924  for (i = 0; i < s->nb_tseq; i++) {
925  if (s->tseq[i].ts.type == 'N') {
926  s->tseq[i].ts.t += now;
927  s->tseq[i].ts.type = 'T'; /* not necessary */
928  }
929  }
930  }
931  if (s->start_ts == AV_NOPTS_VALUE)
932  s->start_ts = (s->opt_start_at_first && s->tseq) ? s->tseq[0].ts.t : now;
933  s->end_ts = s->opt_duration ? s->start_ts + s->opt_duration :
934  AV_NOPTS_VALUE; /* may be overridden later by -E option */
935  cur_ts = now;
936  for (i = 0; i < s->nb_tseq; i++) {
937  if (s->tseq[i].ts.t + delta < cur_ts)
938  delta += DAY_TS;
939  cur_ts = s->tseq[i].ts.t += delta;
940  }
941 }
942 
943 static int expand_tseq(void *log, struct sbg_script *s, int *nb_ev_max,
944  int64_t t0, struct sbg_script_tseq *tseq)
945 {
946  int i, r;
947  struct sbg_script_definition *def;
948  struct sbg_script_tseq *be;
949  struct sbg_script_event *ev;
950 
951  if (tseq->lock++) {
952  av_log(log, AV_LOG_ERROR, "Recursion loop on \"%.*s\"\n",
953  tseq->name_len, tseq->name);
954  return AVERROR(EINVAL);
955  }
956  t0 += tseq->ts.t;
957  for (i = 0; i < s->nb_def; i++) {
958  if (s->def[i].name_len == tseq->name_len &&
959  !memcmp(s->def[i].name, tseq->name, tseq->name_len))
960  break;
961  }
962  if (i >= s->nb_def) {
963  av_log(log, AV_LOG_ERROR, "Tone-set \"%.*s\" not defined\n",
964  tseq->name_len, tseq->name);
965  return AVERROR(EINVAL);
966  }
967  def = &s->def[i];
968  if (def->type == 'B') {
969  be = s->block_tseq + def->elements;
970  for (i = 0; i < def->nb_elements; i++) {
971  r = expand_tseq(log, s, nb_ev_max, t0, &be[i]);
972  if (r < 0)
973  return r;
974  }
975  } else {
976  ev = alloc_array_elem((void **)&s->events, sizeof(*ev),
977  &s->nb_events, nb_ev_max);
978  if (!ev)
979  return AVERROR(ENOMEM);
980  ev->ts = tseq->ts.t;
981  ev->elements = def->elements;
982  ev->nb_elements = def->nb_elements;
983  ev->fade = tseq->fade;
984  }
985  tseq->lock--;
986  return 0;
987 }
988 
989 static int expand_script(void *log, struct sbg_script *s)
990 {
991  int i, r, nb_events_max = 0;
992 
993  expand_timestamps(log, s);
994  for (i = 0; i < s->nb_tseq; i++) {
995  r = expand_tseq(log, s, &nb_events_max, 0, &s->tseq[i]);
996  if (r < 0)
997  return r;
998  }
999  if (!s->nb_events) {
1000  av_log(log, AV_LOG_ERROR, "No events in script\n");
1001  return AVERROR_INVALIDDATA;
1002  }
1003  if (s->opt_end_at_last)
1004  s->end_ts = s->events[s->nb_events - 1].ts;
1005  return 0;
1006 }
1007 
1008 static int add_interval(struct ws_intervals *inter,
1009  enum ws_interval_type type, uint32_t channels, int ref,
1010  int64_t ts1, int32_t f1, int32_t a1,
1011  int64_t ts2, int32_t f2, int32_t a2)
1012 {
1013  struct ws_interval *i, *ri;
1014 
1015  if (ref >= 0) {
1016  ri = &inter->inter[ref];
1017  /* ref and new intervals are constant, identical and adjacent */
1018  if (ri->type == type && ri->channels == channels &&
1019  ri->f1 == ri->f2 && ri->f2 == f1 && f1 == f2 &&
1020  ri->a1 == ri->a2 && ri->a2 == a1 && a1 == a2 &&
1021  ri->ts2 == ts1) {
1022  ri->ts2 = ts2;
1023  return ref;
1024  }
1025  }
1026  i = alloc_array_elem((void **)&inter->inter, sizeof(*i),
1027  &inter->nb_inter, &inter->max_inter);
1028  if (!i)
1029  return AVERROR(ENOMEM);
1030  i->ts1 = ts1;
1031  i->ts2 = ts2;
1032  i->type = type;
1033  i->channels = channels;
1034  i->f1 = f1;
1035  i->f2 = f2;
1036  i->a1 = a1;
1037  i->a2 = a2;
1038  i->phi = ref >= 0 ? ref | 0x80000000 : 0;
1039  return i - inter->inter;
1040 }
1041 
1042 static int add_bell(struct ws_intervals *inter, struct sbg_script *s,
1043  int64_t ts1, int64_t ts2, int32_t f, int32_t a)
1044 {
1045  /* SBaGen uses an exponential decrease every 50ms.
1046  We approximate it with piecewise affine segments. */
1047  int32_t cpoints[][2] = {
1048  { 2, a },
1049  { 4, a - a / 4 },
1050  { 8, a / 2 },
1051  { 16, a / 4 },
1052  { 25, a / 10 },
1053  { 50, a / 80 },
1054  { 75, 0 },
1055  };
1056  int i, r;
1057  int64_t dt = s->sample_rate / 20, ts3 = ts1, ts4;
1058  for (i = 0; i < FF_ARRAY_ELEMS(cpoints); i++) {
1059  ts4 = FFMIN(ts2, ts1 + cpoints[i][0] * dt);
1060  r = add_interval(inter, WS_SINE, 3, -1,
1061  ts3, f, a, ts4, f, cpoints[i][1]);
1062  if (r < 0)
1063  return r;
1064  ts3 = ts4;
1065  a = cpoints[i][1];
1066  }
1067  return 0;
1068 }
1069 
1070 static int generate_interval(void *log, struct sbg_script *s,
1071  struct ws_intervals *inter,
1072  int64_t ts1, int64_t ts2,
1073  struct sbg_script_synth *s1,
1074  struct sbg_script_synth *s2,
1075  int transition)
1076 {
1077  int r;
1078 
1079  if (ts2 <= ts1 || (s1->vol == 0 && s2->vol == 0))
1080  return 0;
1081  switch (s1->type) {
1082  case SBG_TYPE_NONE:
1083  break;
1084  case SBG_TYPE_SINE:
1085  if (s1->beat == 0 && s2->beat == 0) {
1086  r = add_interval(inter, WS_SINE, 3, s1->ref.l,
1087  ts1, s1->carrier, s1->vol,
1088  ts2, s2->carrier, s2->vol);
1089  if (r < 0)
1090  return r;
1091  s2->ref.l = s2->ref.r = r;
1092  } else {
1093  r = add_interval(inter, WS_SINE, 1, s1->ref.l,
1094  ts1, s1->carrier + s1->beat / 2, s1->vol,
1095  ts2, s2->carrier + s2->beat / 2, s2->vol);
1096  if (r < 0)
1097  return r;
1098  s2->ref.l = r;
1099  r = add_interval(inter, WS_SINE, 2, s1->ref.r,
1100  ts1, s1->carrier - s1->beat / 2, s1->vol,
1101  ts2, s2->carrier - s2->beat / 2, s2->vol);
1102  if (r < 0)
1103  return r;
1104  s2->ref.r = r;
1105  }
1106  break;
1107 
1108  case SBG_TYPE_BELL:
1109  if (transition == 2) {
1110  r = add_bell(inter, s, ts1, ts2, s1->carrier, s2->vol);
1111  if (r < 0)
1112  return r;
1113  }
1114  break;
1115 
1116  case SBG_TYPE_SPIN:
1117  av_log(log, AV_LOG_WARNING, "Spinning noise not implemented, "
1118  "using pink noise instead.\n");
1119  /* fall through */
1120  case SBG_TYPE_NOISE:
1121  /* SBaGen's pink noise generator uses:
1122  - 1 band of white noise, mean square: 1/3;
1123  - 9 bands of subsampled white noise with linear
1124  interpolation, mean square: 2/3 each;
1125  with 1/10 weight each: the total mean square is 7/300.
1126  Our pink noise generator uses 8 bands of white noise with
1127  rectangular subsampling: the total mean square is 1/24.
1128  Therefore, to match SBaGen's volume, we must multiply vol by
1129  sqrt((7/300) / (1/24)) = sqrt(14/25) =~ 0.748
1130  */
1131  r = add_interval(inter, WS_NOISE, 3, s1->ref.l,
1132  ts1, 0, s1->vol - s1->vol / 4,
1133  ts2, 0, s2->vol - s2->vol / 4);
1134  if (r < 0)
1135  return r;
1136  s2->ref.l = s2->ref.r = r;
1137  break;
1138 
1139  case SBG_TYPE_MIX:
1140  /* Unimplemented: silence; warning present elsewhere */
1141  default:
1142  av_log(log, AV_LOG_ERROR,
1143  "Type %d is not implemented\n", s1->type);
1144  return AVERROR_PATCHWELCOME;
1145  }
1146  return 0;
1147 }
1148 
1149 static int generate_plateau(void *log, struct sbg_script *s,
1150  struct ws_intervals *inter,
1151  struct sbg_script_event *ev1)
1152 {
1153  int64_t ts1 = ev1->ts_int, ts2 = ev1->ts_trans;
1154  int i, r;
1155  struct sbg_script_synth *s1;
1156 
1157  for (i = 0; i < ev1->nb_elements; i++) {
1158  s1 = &s->synth[ev1->elements + i];
1159  r = generate_interval(log, s, inter, ts1, ts2, s1, s1, 0);
1160  if (r < 0)
1161  return r;
1162  }
1163  return 0;
1164 }
1165 
1166 /*
1167 
1168  ts1 ts2 ts1 tsmid ts2
1169  | | | | |
1170  v v v | v
1171 ____ ____ v ____
1172  ''''.... ''.. ..''
1173  ''''....____ ''....''
1174 
1175  compatible transition incompatible transition
1176  */
1177 
1178 static int generate_transition(void *log, struct sbg_script *s,
1179  struct ws_intervals *inter,
1180  struct sbg_script_event *ev1,
1181  struct sbg_script_event *ev2)
1182 {
1183  int64_t ts1 = ev1->ts_trans, ts2 = ev1->ts_next;
1184  /* (ts1 + ts2) / 2 without overflow */
1185  int64_t tsmid = (ts1 >> 1) + (ts2 >> 1) + (ts1 & ts2 & 1);
1186  enum sbg_fade_type type = ev1->fade.slide | (ev1->fade.out & ev2->fade.in);
1187  int nb_elements = FFMAX(ev1->nb_elements, ev2->nb_elements);
1188  struct sbg_script_synth *s1, *s2, s1mod, s2mod, smid;
1189  int pass, i, r;
1190 
1191  for (pass = 0; pass < 2; pass++) {
1192  /* pass = 0 -> compatible and first half of incompatible
1193  pass = 1 -> second half of incompatible
1194  Using two passes like that ensures that the intervals are generated
1195  in increasing order according to their start timestamp.
1196  Otherwise it would be necessary to sort them
1197  while keeping the mutual references.
1198  */
1199  for (i = 0; i < nb_elements; i++) {
1200  s1 = i < ev1->nb_elements ? &s->synth[ev1->elements + i] : &s1mod;
1201  s2 = i < ev2->nb_elements ? &s->synth[ev2->elements + i] : &s2mod;
1202  s1mod = s1 != &s1mod ? *s1 : (struct sbg_script_synth){ 0 };
1203  s2mod = s2 != &s2mod ? *s2 : (struct sbg_script_synth){ 0 };
1204  if (ev1->fade.slide) {
1205  /* for slides, and only for slides, silence ("-") is equivalent
1206  to anything with volume 0 */
1207  if (s1mod.type == SBG_TYPE_NONE) {
1208  s1mod = s2mod;
1209  s1mod.vol = 0;
1210  } else if (s2mod.type == SBG_TYPE_NONE) {
1211  s2mod = s1mod;
1212  s2mod.vol = 0;
1213  }
1214  }
1215  if (s1mod.type == s2mod.type &&
1216  s1mod.type != SBG_TYPE_BELL &&
1217  (type == SBG_FADE_ADAPT ||
1218  (s1mod.carrier == s2mod.carrier &&
1219  s1mod.beat == s2mod.beat))) {
1220  /* compatible: single transition */
1221  if (!pass) {
1222  r = generate_interval(log, s, inter,
1223  ts1, ts2, &s1mod, &s2mod, 3);
1224  if (r < 0)
1225  return r;
1226  s2->ref = s2mod.ref;
1227  }
1228  } else {
1229  /* incompatible: silence at midpoint */
1230  if (!pass) {
1231  smid = s1mod;
1232  smid.vol = 0;
1233  r = generate_interval(log, s, inter,
1234  ts1, tsmid, &s1mod, &smid, 1);
1235  if (r < 0)
1236  return r;
1237  } else {
1238  smid = s2mod;
1239  smid.vol = 0;
1240  r = generate_interval(log, s, inter,
1241  tsmid, ts2, &smid, &s2mod, 2);
1242  if (r < 0)
1243  return r;
1244  s2->ref = s2mod.ref;
1245  }
1246  }
1247  }
1248  }
1249  return 0;
1250 }
1251 
1252 /*
1253  ev1 trats ev2 intts endts ev3
1254  | | | | | |
1255  v v v v v v
1256  ________________
1257 .... .... ....
1258  '''....________________....''' '''...._______________
1259 
1260 \_________/\______________/\_________/\______________/\_________/\_____________/
1261  tr x->1 int1 tr 1->2 int2 tr 2->3 int3
1262  */
1263 
1264 static int generate_intervals(void *log, struct sbg_script *s, int sample_rate,
1265  struct ws_intervals *inter)
1266 {
1267  int64_t trans_time = s->opt_fade_time / 2;
1268  struct sbg_script_event ev0, *ev1, *ev2;
1269  int64_t period;
1270  int i, r;
1271 
1272  /* SBaGen handles the time before and after the extremal events,
1273  and the corresponding transitions, as if the sequence were cyclic
1274  with a 24-hours period. */
1275  period = s->events[s->nb_events - 1].ts - s->events[0].ts;
1276  period = (period + (DAY_TS - 1)) / DAY_TS * DAY_TS;
1277  period = FFMAX(period, DAY_TS);
1278 
1279  /* Prepare timestamps for transitions */
1280  for (i = 0; i < s->nb_events; i++) {
1281  ev1 = &s->events[i];
1282  ev2 = &s->events[(i + 1) % s->nb_events];
1283  ev1->ts_int = ev1->ts;
1284 
1285  if (!ev1->fade.slide && ev1 >= ev2 && ev2->ts > INT64_MAX - period)
1286  return AVERROR_INVALIDDATA;
1287 
1288  ev1->ts_trans = ev1->fade.slide ? ev1->ts
1289  : ev2->ts + (ev1 < ev2 ? 0 : period);
1290  }
1291  for (i = 0; i < s->nb_events; i++) {
1292  ev1 = &s->events[i];
1293  ev2 = &s->events[(i + 1) % s->nb_events];
1294  if (!ev1->fade.slide) {
1295  ev1->ts_trans = FFMAX(ev1->ts_int, ev1->ts_trans - trans_time);
1296  ev2->ts_int = FFMIN(ev2->ts_trans, ev2->ts_int + trans_time);
1297  }
1298  ev1->ts_next = ev2->ts_int + (ev1 < ev2 ? 0 : period);
1299  }
1300 
1301  /* Pseudo event before the first one */
1302  ev0 = s->events[s->nb_events - 1];
1303  ev0.ts_int -= period;
1304  ev0.ts_trans -= period;
1305  ev0.ts_next -= period;
1306 
1307  /* Convert timestamps */
1308  for (i = -1; i < s->nb_events; i++) {
1309  ev1 = i < 0 ? &ev0 : &s->events[i];
1313  }
1314 
1315  /* Generate intervals */
1316  for (i = 0; i < s->nb_synth; i++)
1317  s->synth[i].ref.l = s->synth[i].ref.r = -1;
1318  for (i = -1; i < s->nb_events; i++) {
1319  ev1 = i < 0 ? &ev0 : &s->events[i];
1320  ev2 = &s->events[(i + 1) % s->nb_events];
1321  r = generate_plateau(log, s, inter, ev1);
1322  if (r < 0)
1323  return r;
1324  r = generate_transition(log, s, inter, ev1, ev2);
1325  if (r < 0)
1326  return r;
1327  }
1328  if (!inter->nb_inter)
1329  av_log(log, AV_LOG_WARNING, "Completely silent script.\n");
1330  return 0;
1331 }
1332 
1334  struct ws_intervals *inter)
1335 {
1336  int i, edata_size = 4;
1337  uint8_t *edata;
1338 
1339  for (i = 0; i < inter->nb_inter; i++) {
1340  edata_size += inter->inter[i].type == WS_SINE ? 44 :
1341  inter->inter[i].type == WS_NOISE ? 32 : 0;
1342  if (edata_size < 0)
1343  return AVERROR(ENOMEM);
1344  }
1345  if (ff_alloc_extradata(par, edata_size))
1346  return AVERROR(ENOMEM);
1347  edata = par->extradata;
1348 
1349 #define ADD_EDATA32(v) do { AV_WL32(edata, (v)); edata += 4; } while(0)
1350 #define ADD_EDATA64(v) do { AV_WL64(edata, (v)); edata += 8; } while(0)
1351  ADD_EDATA32(inter->nb_inter);
1352  for (i = 0; i < inter->nb_inter; i++) {
1353  ADD_EDATA64(inter->inter[i].ts1);
1354  ADD_EDATA64(inter->inter[i].ts2);
1355  ADD_EDATA32(inter->inter[i].type);
1356  ADD_EDATA32(inter->inter[i].channels);
1357  switch (inter->inter[i].type) {
1358  case WS_SINE:
1359  ADD_EDATA32(inter->inter[i].f1);
1360  ADD_EDATA32(inter->inter[i].f2);
1361  ADD_EDATA32(inter->inter[i].a1);
1362  ADD_EDATA32(inter->inter[i].a2);
1363  ADD_EDATA32(inter->inter[i].phi);
1364  break;
1365  case WS_NOISE:
1366  ADD_EDATA32(inter->inter[i].a1);
1367  ADD_EDATA32(inter->inter[i].a2);
1368  break;
1369  }
1370  }
1371  if (edata != par->extradata + edata_size)
1372  return AVERROR_BUG;
1373  return 0;
1374 }
1375 
1376 static av_cold int sbg_read_probe(const AVProbeData *p)
1377 {
1378  int r, score;
1379  struct sbg_script script = { 0 };
1380 
1381  r = parse_script(NULL, p->buf, p->buf_size, &script);
1382  score = r < 0 || !script.nb_def || !script.nb_tseq ? 0 :
1383  AVPROBE_SCORE_MAX / 3;
1384  free_script(&script);
1385  return score;
1386 }
1387 
1389 {
1390  struct sbg_demuxer *sbg = avf->priv_data;
1391  int r;
1392  char *buf = NULL;
1393  struct sbg_script script = { 0 };
1394  AVStream *st;
1395  struct ws_intervals inter = { 0 };
1396 
1397  r = read_whole_file(avf->pb, sbg->max_file_size, &buf);
1398  if (r < 0)
1399  goto fail;
1400  r = parse_script(avf, buf, r, &script);
1401  if (r < 0)
1402  goto fail;
1403  if (!sbg->sample_rate)
1404  sbg->sample_rate = script.sample_rate;
1405  else
1406  script.sample_rate = sbg->sample_rate;
1407  if (!sbg->frame_size)
1408  sbg->frame_size = FFMAX(1, sbg->sample_rate / 10);
1409  if (script.opt_mix)
1410  av_log(avf, AV_LOG_WARNING, "Mix feature not implemented: "
1411  "-m is ignored and mix channels will be silent.\n");
1412  r = expand_script(avf, &script);
1413  if (r < 0)
1414  goto fail;
1415  av_freep(&buf);
1416  r = generate_intervals(avf, &script, sbg->sample_rate, &inter);
1417  if (r < 0)
1418  goto fail;
1419 
1420  if (script.end_ts != AV_NOPTS_VALUE && script.end_ts < script.start_ts) {
1422  goto fail;
1423  }
1424 
1425  st = avformat_new_stream(avf, NULL);
1426  if (!st)
1427  return AVERROR(ENOMEM);
1430  st->codecpar->channels = 2;
1432  st->codecpar->sample_rate = sbg->sample_rate;
1433  st->codecpar->frame_size = sbg->frame_size;
1434  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
1435  st->probe_packets = 0;
1436  st->start_time = av_rescale(script.start_ts,
1437  sbg->sample_rate, AV_TIME_BASE);
1438  st->duration = script.end_ts == AV_NOPTS_VALUE ? AV_NOPTS_VALUE :
1439  av_rescale(script.end_ts - script.start_ts,
1440  sbg->sample_rate, AV_TIME_BASE);
1441  st->cur_dts = st->start_time;
1442  r = encode_intervals(&script, st->codecpar, &inter);
1443  if (r < 0)
1444  goto fail;
1445 
1446  av_free(inter.inter);
1447  free_script(&script);
1448  return 0;
1449 
1450 fail:
1451  av_free(inter.inter);
1452  free_script(&script);
1453  av_free(buf);
1454  return r;
1455 }
1456 
1457 static int sbg_read_packet(AVFormatContext *avf, AVPacket *packet)
1458 {
1459  int64_t ts, end_ts;
1460 
1461  ts = avf->streams[0]->cur_dts;
1462  end_ts = ts + avf->streams[0]->codecpar->frame_size;
1463  if (avf->streams[0]->duration != AV_NOPTS_VALUE)
1464  end_ts = FFMIN(avf->streams[0]->start_time + avf->streams[0]->duration,
1465  end_ts);
1466  if (end_ts <= ts)
1467  return AVERROR_EOF;
1468  if (av_new_packet(packet, 12) < 0)
1469  return AVERROR(ENOMEM);
1470  packet->dts = packet->pts = ts;
1471  packet->duration = end_ts - ts;
1472  AV_WL64(packet->data + 0, ts);
1473  AV_WL32(packet->data + 8, packet->duration);
1474  return packet->size;
1475 }
1476 
1477 static int sbg_read_seek2(AVFormatContext *avf, int stream_index,
1478  int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1479 {
1480  if (flags || stream_index > 0)
1481  return AVERROR(EINVAL);
1482  if (stream_index < 0)
1483  ts = av_rescale_q(ts, AV_TIME_BASE_Q, avf->streams[0]->time_base);
1484  avf->streams[0]->cur_dts = ts;
1485  return 0;
1486 }
1487 
1488 static int sbg_read_seek(AVFormatContext *avf, int stream_index,
1489  int64_t ts, int flags)
1490 {
1491  return sbg_read_seek2(avf, stream_index, ts, ts, ts, 0);
1492 }
1493 
1494 static const AVOption sbg_options[] = {
1495  { "sample_rate", "", offsetof(struct sbg_demuxer, sample_rate),
1496  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX,
1498  { "frame_size", "", offsetof(struct sbg_demuxer, frame_size),
1499  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX,
1501  { "max_file_size", "", offsetof(struct sbg_demuxer, max_file_size),
1502  AV_OPT_TYPE_INT, { .i64 = 5000000 }, 0, INT_MAX,
1504  { NULL },
1505 };
1506 
1507 static const AVClass sbg_demuxer_class = {
1508  .class_name = "sbg_demuxer",
1509  .item_name = av_default_item_name,
1510  .option = sbg_options,
1511  .version = LIBAVUTIL_VERSION_INT,
1512 };
1513 
1515  .name = "sbg",
1516  .long_name = NULL_IF_CONFIG_SMALL("SBaGen binaural beats script"),
1517  .priv_data_size = sizeof(struct sbg_demuxer),
1519  .read_header = sbg_read_header,
1520  .read_packet = sbg_read_packet,
1521  .read_seek = sbg_read_seek,
1522  .read_seek2 = sbg_read_seek2,
1523  .extensions = "sbg",
1524  .priv_class = &sbg_demuxer_class,
1525 };
ws_interval::phi
uint64_t phi
Definition: ffwavesynth.c:86
sbg_script_synth::beat
int beat
Definition: sbgdec.c:83
be
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it be(in the first position) for now. Options ------- Then comes the options array. This is what will define the user accessible options. For example
sbg_parser::script
char * script
Definition: sbgdec.c:128
ws_interval::type
enum ws_interval_type type
Definition: ffwavesynth.c:88
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
parse_synth_channel
static int parse_synth_channel(struct sbg_parser *p)
Definition: sbgdec.c:707
r
const char * r
Definition: vf_curves.c:114
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4480
scale_double
static int scale_double(void *log, double d, double m, int *r)
Definition: sbgdec.c:211
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
str_to_time
static int str_to_time(const char *str, int64_t *rtime)
Definition: sbgdec.c:178
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3949
sbg_parser::nb_block_tseq
int nb_block_tseq
Definition: sbgdec.c:132
strtod
double strtod(const char *, char **)
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:366
sbg_script::nb_tseq
int nb_tseq
Definition: sbgdec.c:113
SBG_TYPE_NONE
@ SBG_TYPE_NONE
Definition: sbgdec.c:59
sbg_script_synth::carrier
int carrier
Definition: sbgdec.c:82
sbg_script_event::ts_next
int64_t ts_next
Definition: sbgdec.c:101
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
sbg_script_tseq::ts
struct sbg_timestamp ts
Definition: sbgdec.c:92
lex_char
static int lex_char(struct sbg_parser *p, char c)
Definition: sbgdec.c:232
parse_synth_channel_pink
static int parse_synth_channel_pink(struct sbg_parser *p, struct sbg_script_synth *synth)
Definition: sbgdec.c:639
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
sbg_script::block_tseq
struct sbg_script_tseq * block_tseq
Definition: sbgdec.c:110
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1410
name
const char * name
Definition: avisynth_c.h:867
AVPacket::data
uint8_t * data
Definition: avcodec.h:1477
sbg_script::end_ts
int64_t end_ts
Definition: sbgdec.c:117
AVOption
AVOption.
Definition: opt.h:246
t0
#define t0
Definition: regdef.h:28
sbg_parser::current_time
struct sbg_timestamp current_time
Definition: sbgdec.c:131
AVStream::cur_dts
int64_t cur_dts
Definition: avformat.h:1073
sbg_parser::log
void * log
Definition: sbgdec.c:127
lex_time
static int lex_time(struct sbg_parser *p, int64_t *rt)
Definition: sbgdec.c:310
sbg_fade::in
int8_t in
Definition: sbgdec.c:55
sbg_read_seek2
static int sbg_read_seek2(AVFormatContext *avf, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Definition: sbgdec.c:1477
channels
channels
Definition: aptx.c:30
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
ws_intervals::nb_inter
int nb_inter
Definition: sbgdec.c:154
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
ws_intervals::inter
struct ws_interval * inter
Definition: sbgdec.c:153
sbg_script_definition::name
char * name
Definition: sbgdec.c:75
is_space
static int is_space(char c)
Definition: sbgdec.c:206
sample_rate
sample_rate
Definition: ffmpeg_filter.c:191
sbg_script_event
Definition: sbgdec.c:99
sbg_string
Definition: sbgdec.c:43
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
SBG_TYPE_NOISE
@ SBG_TYPE_NOISE
Definition: sbgdec.c:61
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:4063
sbg_parser
Definition: sbgdec.c:126
SBG_TYPE_SINE
@ SBG_TYPE_SINE
Definition: sbgdec.c:60
fail
#define fail()
Definition: checkasm.h:120
sbg_parser::err_msg
char err_msg[128]
Definition: sbgdec.c:135
sbg_script_tseq
Definition: sbgdec.c:91
sbg_read_packet
static int sbg_read_packet(AVFormatContext *avf, AVPacket *packet)
Definition: sbgdec.c:1457
sbg_script::opt_duration
int64_t opt_duration
Definition: sbgdec.c:119
sbg_script::nb_events
int nb_events
Definition: sbgdec.c:114
sbg_script_synth::r
int r
Definition: sbgdec.c:87
ws_interval::ts2
int64_t ts2
Definition: sbgdec.c:144
sbg_script_definition::type
char type
Definition: sbgdec.c:78
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
sbg_timestamp::type
char type
Definition: sbgdec.c:71
sbg_fade
Definition: sbgdec.c:54
sbg_demuxer::max_file_size
int max_file_size
Definition: sbgdec.c:40
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:919
ws_interval::phi
uint32_t phi
Definition: sbgdec.c:149
AV_CODEC_ID_FFWAVESYNTH
@ AV_CODEC_ID_FFWAVESYNTH
Definition: avcodec.h:633
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:86
sbg_script::nb_def
int nb_def
Definition: sbgdec.c:112
sbg_script::synth
struct sbg_script_synth * synth
Definition: sbgdec.c:108
a1
#define a1
Definition: regdef.h:47
sbg_script_synth
Definition: sbgdec.c:81
lex_space
static int lex_space(struct sbg_parser *p)
Definition: sbgdec.c:223
add_interval
static int add_interval(struct ws_intervals *inter, enum ws_interval_type type, uint32_t channels, int ref, int64_t ts1, int32_t f1, int32_t a1, int64_t ts2, int32_t f2, int32_t a2)
Definition: sbgdec.c:1008
read_whole_file
static int read_whole_file(AVIOContext *io, int max_size, char **rbuf)
Definition: sbgdec.c:856
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
buf
void * buf
Definition: avisynth_c.h:766
AVInputFormat
Definition: avformat.h:640
av_cold
#define av_cold
Definition: attributes.h:84
generate_plateau
static int generate_plateau(void *log, struct sbg_script *s, struct ws_intervals *inter, struct sbg_script_event *ev1)
Definition: sbgdec.c:1149
AVCodecParameters::frame_size
int frame_size
Audio only.
Definition: avcodec.h:4078
expand_tseq
static int expand_tseq(void *log, struct sbg_script *s, int *nb_ev_max, int64_t t0, struct sbg_script_tseq *tseq)
Definition: sbgdec.c:943
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
ws_interval::f2
int32_t f2
Definition: sbgdec.c:147
parse_wave_def
static int parse_wave_def(struct sbg_parser *p, int wavenum)
Definition: sbgdec.c:569
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
sbg_script_definition
Definition: sbgdec.c:74
sbg_script_synth::type
enum sbg_synth_type type
Definition: sbgdec.c:85
FORWARD_ERROR
#define FORWARD_ERROR(c)
Definition: sbgdec.c:317
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
frame_size
int frame_size
Definition: mxfenc.c:2215
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
s1
#define s1
Definition: regdef.h:38
sbg_script::opt_fade_time
int64_t opt_fade_time
Definition: sbgdec.c:118
lex_name
static int lex_name(struct sbg_parser *p, struct sbg_string *rs)
Definition: sbgdec.c:296
sbg_fade::out
int8_t out
Definition: sbgdec.c:55
ctx
AVFormatContext * ctx
Definition: movenc.c:48
parse_optarg
static int parse_optarg(struct sbg_parser *p, char o, struct sbg_string *r)
Definition: sbgdec.c:338
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
sbg_options
static const AVOption sbg_options[]
Definition: sbgdec.c:1494
lex_fixed
static int lex_fixed(struct sbg_parser *p, const char *t, int l)
Definition: sbgdec.c:256
sbg_script_event::ts_trans
int64_t ts_trans
Definition: sbgdec.c:101
sbg_script::tseq
struct sbg_script_tseq * tseq
Definition: sbgdec.c:109
f
#define f(width, name)
Definition: cbs_vp9.c:255
pass
#define pass
Definition: fft_template.c:619
sbg_script_definition::nb_elements
int nb_elements
Definition: sbgdec.c:77
int32_t
int32_t
Definition: audio_convert.c:194
SBG_TYPE_BELL
@ SBG_TYPE_BELL
Definition: sbgdec.c:62
sbg_read_seek
static int sbg_read_seek(AVFormatContext *avf, int stream_index, int64_t ts, int flags)
Definition: sbgdec.c:1488
time_internal.h
if
if(ret)
Definition: filter_design.txt:179
ws_interval::a2
int32_t a2
Definition: sbgdec.c:148
AVFormatContext
Format I/O context.
Definition: avformat.h:1342
av_realloc_f
#define av_realloc_f(p, o, n)
Definition: tableprint_vlc.h:33
parse_synth_channel_sine
static int parse_synth_channel_sine(struct sbg_parser *p, struct sbg_script_synth *synth)
Definition: sbgdec.c:618
internal.h
parse_synth_channel_spin
static int parse_synth_channel_spin(struct sbg_parser *p, struct sbg_script_synth *synth)
Definition: sbgdec.c:684
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1017
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
sbg_demuxer
Definition: sbgdec.c:36
generate_intervals
static int generate_intervals(void *log, struct sbg_script *s, int sample_rate, struct ws_intervals *inter)
Definition: sbgdec.c:1264
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:899
WS_NOISE
@ WS_NOISE
Definition: sbgdec.c:140
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
sbg_script::def
struct sbg_script_definition * def
Definition: sbgdec.c:107
sbg_script_tseq::lock
int lock
Definition: sbgdec.c:95
SBG_TYPE_SPIN
@ SBG_TYPE_SPIN
Definition: sbgdec.c:64
period
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are in without period
Definition: writing_filters.txt:89
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1384
lex_wsword
static int lex_wsword(struct sbg_parser *p, struct sbg_string *rs)
Definition: sbgdec.c:282
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
parse_script
static int parse_script(void *log, char *script, int script_len, struct sbg_script *rscript)
Definition: sbgdec.c:794
sbg_demuxer_class
static const AVClass sbg_demuxer_class
Definition: sbgdec.c:1507
sbg_script::events
struct sbg_script_event * events
Definition: sbgdec.c:111
time.h
ff_sbg_demuxer
AVInputFormat ff_sbg_demuxer
Definition: sbgdec.c:1514
abs
#define abs(x)
Definition: cuda_runtime.h:35
sbg_script_event::fade
struct sbg_fade fade
Definition: sbgdec.c:103
parse_fade
static int parse_fade(struct sbg_parser *p, struct sbg_fade *fr)
Definition: sbgdec.c:492
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:4067
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
s2
#define s2
Definition: regdef.h:39
parse_named_def
static int parse_named_def(struct sbg_parser *p)
Definition: sbgdec.c:757
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVPacket::size
int size
Definition: avcodec.h:1478
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:188
sbg_fade_type
sbg_fade_type
Definition: sbgdec.c:48
localtime_r
#define localtime_r
Definition: time_internal.h:46
sbg_script::nb_synth
int nb_synth
Definition: sbgdec.c:115
parse_synth_channel_bell
static int parse_synth_channel_bell(struct sbg_parser *p, struct sbg_script_synth *synth)
Definition: sbgdec.c:652
sp
#define sp
Definition: regdef.h:63
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4910
sbg_script::opt_mix
char * opt_mix
Definition: sbgdec.c:120
AVStream::probe_packets
int probe_packets
Number of packets to buffer for codec probing.
Definition: avformat.h:1080
add_bell
static int add_bell(struct ws_intervals *inter, struct sbg_script *s, int64_t ts1, int64_t ts2, int32_t f, int32_t a)
Definition: sbgdec.c:1042
ADD_EDATA64
#define ADD_EDATA64(v)
size
int size
Definition: twinvq_data.h:11134
ws_interval::channels
uint32_t channels
Definition: ffwavesynth.c:87
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
WS_SINE
@ WS_SINE
Definition: sbgdec.c:139
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: avcodec.h:1476
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
AV_WL64
#define AV_WL64(p, v)
Definition: intreadwrite.h:440
sbg_fade::slide
int8_t slide
Definition: sbgdec.c:55
parse_time_sequence
static int parse_time_sequence(struct sbg_parser *p, int inblock)
Definition: sbgdec.c:516
sbg_parser::end
char * end
Definition: sbgdec.c:128
sbg_string::s
char * s
Definition: sbgdec.c:44
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
sbg_timestamp
Definition: sbgdec.c:69
sbg_read_header
static av_cold int sbg_read_header(AVFormatContext *avf)
Definition: sbgdec.c:1388
parse_block_def
static int parse_block_def(struct sbg_parser *p, struct sbg_script_definition *def)
Definition: sbgdec.c:576
log.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
sbg_synth_type
sbg_synth_type
Definition: sbgdec.c:58
sbg_script_definition::name_len
int name_len
Definition: sbgdec.c:76
sbg_parser::cursor
char * cursor
Definition: sbgdec.c:129
sbg_script_event::ts
int64_t ts
Definition: sbgdec.c:100
a2
#define a2
Definition: regdef.h:48
delta
float delta
Definition: vorbis_enc_data.h:457
AV_OPT_FLAG_DECODING_PARAM
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:277
SBG_FADE_SILENCE
@ SBG_FADE_SILENCE
Definition: sbgdec.c:49
uint8_t
uint8_t
Definition: audio_convert.c:194
sbg_demuxer::frame_size
int frame_size
Definition: sbgdec.c:39
sbg_script_synth::vol
int vol
Definition: sbgdec.c:84
parse_options
static int parse_options(struct sbg_parser *p)
Definition: sbgdec.c:348
ws_interval
Definition: ffwavesynth.c:82
parse_volume
static int parse_volume(struct sbg_parser *p, int *vol)
Definition: sbgdec.c:605
fade
static void fade(uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, int width, int height, int alpha, int beta)
Definition: vp8.c:488
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
sbg_parser::nb_block_tseq_max
int nb_block_tseq_max
Definition: sbgdec.c:133
sbg_script_event::nb_elements
int nb_elements
Definition: sbgdec.c:102
expand_timestamps
static void expand_timestamps(void *log, struct sbg_script *s)
Definition: sbgdec.c:889
parse_immediate
static int parse_immediate(struct sbg_parser *p)
Definition: sbgdec.c:324
ws_intervals::max_inter
int max_inter
Definition: sbgdec.c:155
sbg_demuxer::sample_rate
int sample_rate
Definition: sbgdec.c:38
ws_interval::f1
int32_t f1
Definition: sbgdec.c:147
array
static int array[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:106
parse_timestamp
static int parse_timestamp(struct sbg_parser *p, struct sbg_timestamp *rts, int64_t *rrel)
Definition: sbgdec.c:461
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:870
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
parse_synth_def
static int parse_synth_def(struct sbg_parser *p, struct sbg_script_definition *def)
Definition: sbgdec.c:733
avformat.h
sbg_parser::line_no
int line_no
Definition: sbgdec.c:134
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:38
sbg_read_probe
static av_cold int sbg_read_probe(const AVProbeData *p)
Definition: sbgdec.c:1376
sbg_parser::nb_def_max
int nb_def_max
Definition: sbgdec.c:133
sbg_parser::nb_tseq_max
int nb_tseq_max
Definition: sbgdec.c:133
generate_transition
static int generate_transition(void *log, struct sbg_script *s, struct ws_intervals *inter, struct sbg_script_event *ev1, struct sbg_script_event *ev2)
Definition: sbgdec.c:1178
sbg_script_tseq::name
char * name
Definition: sbgdec.c:93
sbg_script_event::ts_int
int64_t ts_int
Definition: sbgdec.c:101
sbg_script_synth::l
int l
Definition: sbgdec.c:87
mode
mode
Definition: ebur128.h:83
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:223
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:647
DAY
#define DAY
Definition: sbgdec.c:33
DAY_TS
#define DAY_TS
Definition: sbgdec.c:34
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
sbg_script
Definition: sbgdec.c:106
sbg_script_definition::elements
int elements
Definition: sbgdec.c:77
SBG_SCALE
#define SBG_SCALE
Definition: sbgdec.c:32
SBG_FADE_ADAPT
@ SBG_FADE_ADAPT
Definition: sbgdec.c:51
sbg_script::opt_start_at_first
uint8_t opt_start_at_first
Definition: sbgdec.c:122
ws_intervals
Definition: sbgdec.c:152
sbg_script::opt_end_at_last
uint8_t opt_end_at_last
Definition: sbgdec.c:123
sbg_parser::scs
struct sbg_script scs
Definition: sbgdec.c:130
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
free_script
static void free_script(struct sbg_script *s)
Definition: sbgdec.c:784
sbg_script_event::elements
int elements
Definition: sbgdec.c:102
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
alloc_array_elem
static void * alloc_array_elem(void **array, size_t elsize, int *size, int *max_size)
Definition: sbgdec.c:158
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1454
sbg_script_tseq::name_len
int name_len
Definition: sbgdec.c:94
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4059
sbg_parser::nb_synth_max
int nb_synth_max
Definition: sbgdec.c:133
sbg_string::e
char * e
Definition: sbgdec.c:45
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:565
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
parse_preprogrammed
static int parse_preprogrammed(struct sbg_parser *p)
Definition: sbgdec.c:331
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
ws_interval::a1
int32_t a1
Definition: sbgdec.c:148
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:909
SBG_TYPE_MIX
@ SBG_TYPE_MIX
Definition: sbgdec.c:63
SBG_FADE_SAME
@ SBG_FADE_SAME
Definition: sbgdec.c:50
ws_interval::ts1
int64_t ts1
Definition: sbgdec.c:144
ADD_EDATA32
#define ADD_EDATA32(v)
sbg_script::start_ts
int64_t start_ts
Definition: sbgdec.c:116
encode_intervals
static int encode_intervals(struct sbg_script *s, AVCodecParameters *par, struct ws_intervals *inter)
Definition: sbgdec.c:1333
sbg_timestamp::t
int64_t t
Definition: sbgdec.c:70
snprintf
#define snprintf
Definition: snprintf.h:34
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1370
sbg_script_synth::ref
struct sbg_script_synth::@280 ref
lex_line_end
static int lex_line_end(struct sbg_parser *p)
Definition: sbgdec.c:264
lex_double
static int lex_double(struct sbg_parser *p, double *r)
Definition: sbgdec.c:240
parse_synth_channel_mix
static int parse_synth_channel_mix(struct sbg_parser *p, struct sbg_script_synth *synth)
Definition: sbgdec.c:671
sbg_script::sample_rate
int sample_rate
Definition: sbgdec.c:121
av_x_if_null
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:308
ws_interval_type
ws_interval_type
Definition: ffwavesynth.c:77
sbg_script_tseq::fade
struct sbg_fade fade
Definition: sbgdec.c:96
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:3309
expand_script
static int expand_script(void *log, struct sbg_script *s)
Definition: sbgdec.c:989
generate_interval
static int generate_interval(void *log, struct sbg_script *s, struct ws_intervals *inter, int64_t ts1, int64_t ts2, struct sbg_script_synth *s1, struct sbg_script_synth *s2, int transition)
Definition: sbgdec.c:1070