Annotation of multiplexer/splicets.c, revision 1.14
1.1 oskar 1: /*
2: * ISO 13818 stream multiplexer
3: * Copyright (C) 2001 Convergence Integrated Media GmbH Berlin
4: * Author: Oskar Schirmer (oskar@convergence.de)
5: */
6:
7: /*
8: * Module: Splice TS
9: * Purpose: Generate transport stream.
10: *
11: * This module generates from the available input stream data (as
12: * seperated by the split functions) the complete output stream.
13: * It provides functions to handle programs for the resulting stream,
14: * as these are output format dependent. Further, it accepts PSI data
15: * just in time, validating it not earlier than with the arrival of
16: * the corresponding payload at this stage.
17: */
18:
19: #include "global.h"
20: #include "crc.h"
21: #include "error.h"
22: #include "input.h"
23: #include "output.h"
24: #include "descref.h"
1.6 oskar 25: #include "splitts.h"
1.1 oskar 26: #include "pes.h"
27: #include "ts.h"
28: #include "splice.h"
29: #include "splicets.h"
30:
31: const boolean splice_multipleprograms = TRUE;
32:
33: static boolean changed_pat;
34: static int pat_section;
35: static const int last_patsection = 0;
36: static byte nextpat_version;
37: static byte pat_conticnt;
38:
39: static int transportstreamid;
40:
41: static int psi_size;
42: static int psi_done;
43: static byte psi_data [MAX_PSI_SIZE];
44:
45: static byte unit_start;
46: static byte *conticnt;
47: static int psi_pid;
48:
49: static int progs;
50: static prog_descr *prog [MAX_OUTPROG];
51:
52: static int nextpid;
53: static stream_descr *outs [MAX_STRPERTS];
54:
1.13 oskar 55: static stump_descr *globalstumps;
56:
1.9 oskar 57: boolean splice_specific_init (void)
1.1 oskar 58: {
59: progs = 0;
60: nextpid = 0;
61: memset (outs,0,sizeof(outs));
62: changed_pat = TRUE;
63: pat_section = 0;
64: nextpat_version = 0;
65: pat_conticnt = 0;
66: psi_size = psi_done = 0;
67: unit_start = TS_UNIT_START;
68: transportstreamid = 0x4227;
1.13 oskar 69: globalstumps = NULL;
1.1 oskar 70: return (TRUE);
71: }
72:
73: void splice_settransportstreamid (int tsid)
74: {
75: transportstreamid = tsid;
76: }
77:
1.11 oskar 78: void splice_setpsifrequency (t_msec freq)
1.1 oskar 79: {
80: psi_frequency_msec = freq;
81: psi_frequency_changed = TRUE;
82: }
83:
84: static int findapid (stream_descr *s)
85: {
1.13 oskar 86: byte okness = 2;
87: int h;
1.1 oskar 88: do {
1.2 oskar 89: if ((nextpid < TS_PID_SPLICELO) || (nextpid >= TS_PID_SPLICEHI)) {
1.13 oskar 90: warn (LDEB,"Next PID",ETSC,1,okness,nextpid);
91: if (okness == 0) {
1.1 oskar 92: warn (LERR,"No PID found",ETSC,2,1,0);
93: return (0);
94: }
1.13 oskar 95: okness -= 1;
1.2 oskar 96: nextpid = TS_PID_SPLICELO;
1.1 oskar 97: } else {
1.13 oskar 98: warn (LDEB,"Next PID",ETSC,2,okness,nextpid);
1.1 oskar 99: nextpid += 1;
100: }
1.13 oskar 101: if (okness != 0) {
102: h = input_tssiinafilerange (nextpid);
103: warn (LDEB,"Next PID",ETSC,3,h,nextpid);
104: if (h >= 0) {
105: nextpid = h;
106: }
107: } else {
108: h = -1;
109: }
110: } while ((h >= 0)
111: || (outs[nextpid] != NULL));
1.1 oskar 112: outs[nextpid] = s;
113: warn (LDEB,"Next PID",ETSC,2,2,nextpid);
114: return (nextpid);
115: }
116:
1.9 oskar 117: void splice_all_configuration (void)
118: {
119: int i;
120: if (configuration_on && configuration_changed) {
121: i = progs;
122: fprintf (stderr, configuration_total, i);
123: while (--i >= 0) {
124: splice_one_configuration (prog[i]);
125: }
126: configuration_changed = FALSE;
127: }
128: }
129:
1.13 oskar 130: void splice_addsirange (file_descr *f,
131: int lower,
132: int upper)
133: {
134: int i, r;
135: tssi_descr *tssi;
136: prog_descr *p;
137: tssi = malloc (sizeof (tssi_descr));
138: if (tssi != NULL) {
139: if (ts_file_stream (f,TS_UNPARSED_SI) == NULL) {
140: ts_file_stream (f,TS_UNPARSED_SI) = input_openstream (f,
141: TS_UNPARSED_SI,0,0,sd_unparsedsi,NULL);
142: }
143: if (ts_file_stream (f,TS_UNPARSED_SI) != NULL) {
144: tssi->next = f->u.ts.tssi;
145: tssi->pid_low = lower;
146: tssi->pid_high = upper;
147: f->u.ts.tssi = tssi;
148: r = upper; /* check for collision against existing PIDs, first sd_data */
149: while (r >= lower) {
150: stream_descr *s;
151: s = outs[r];
152: if ((s != NULL)
153: && (s != PMT_STREAM)) {
154: if (s->streamdata == sd_data) {
155: i = findapid (s);
156: if (input_tssiinafilerange (i) >= 0) { /* none free! */
157: outs[i] = NULL;
158: } else {
159: int j;
160: s->u.d.pid = i;
161: j = s->u.d.progs;
162: while (--j >= 0) {
163: p = s->u.d.pdescr[j];
164: p->changed = TRUE;
165: if (p->pcr_pid == r) {
166: p->pcr_pid = i;
167: }
168: }
169: configuration_changed = TRUE;
170: outs[r] = NULL;
171: }
172: } else {
173: warn (LERR,"Bad PID",ETSC,11,s->streamdata,r);
174: }
175: }
176: r -= 1;
177: }
178: i = progs; /* ...then sd_map */
179: while (--i >= 0) {
180: p = prog[i];
181: r = p->pmt_pid;
182: if ((r >= lower)
183: && (r <= upper)) {
184: int q;
185: q = findapid (PMT_STREAM);
186: if (input_tssiinafilerange (q) >= 0) { /* none free! */
187: outs[q] = NULL;
188: } else {
189: int j;
190: outs[r] = NULL;
191: j = i;
192: while (--j >= 0) {
193: if (prog[j]->pmt_pid == r) {
194: prog[j]->pmt_pid = q;
195: }
196: }
197: p->pmt_pid = q;
198: changed_pat = TRUE;
199: configuration_changed = TRUE;
200: }
201: }
202: }
203: } else {
204: free (tssi);
205: }
206: }
207: }
208:
209: void splice_createstump (int programnb,
210: short pid,
211: byte styp)
212: {
213: prog_descr *p;
214: stump_descr **pst;
215: stump_descr *st;
216: p = splice_getprog (programnb);
217: if (p != NULL) {
218: configuration_changed = TRUE;
219: p->changed = TRUE;
220: pst = &(p->stump);
221: } else {
222: pst = &globalstumps;
223: }
224: st = *pst;
225: while ((st != NULL)
226: && ((st->pid != pid)
227: || (st->program_number != programnb))) {
228: st = st->next;
229: }
230: if (st == NULL) {
231: st = malloc (sizeof(stump_descr));
232: st->next = *pst;
233: st->program_number = programnb;
234: st->pid = pid;
235: *pst = st;
236: }
237: st->stream_type = styp;
238: clear_descrdescr (&(st->manudescr));
239: }
240:
241: stump_descr *splice_getstumps (int programnb,
242: short pid)
243: {
244: prog_descr *p;
245: stump_descr **pst;
246: stump_descr *rl;
247: rl = NULL;
248: p = splice_getprog (programnb);
249: if (p != NULL) {
250: pst = &(p->stump);
251: } else {
252: pst = &globalstumps;
253: }
254: while (*pst != NULL) {
255: stump_descr *st;
256: st = *pst;
257: if ((st->program_number == programnb)
258: && ((pid < 0)
259: || (pid == st->pid))) {
260: st = *pst;
261: *pst = st->next;
262: st->next = rl;
263: rl = st;
264: if (p != NULL) {
265: configuration_changed = TRUE;
266: p->changed = TRUE;
267: }
268: } else {
269: pst = &((*pst)->next);
270: }
271: }
272: return (rl);
273: }
274:
1.3 oskar 275: prog_descr *splice_getprog (int programnb)
276: {
277: int i;
278: i = progs;
279: while (--i >= 0) {
280: if (prog[i]->program_number == programnb) {
281: return (prog[i]);
282: }
283: }
284: return (NULL);
285: }
286:
1.1 oskar 287: prog_descr *splice_openprog (int programnb)
288: {
289: prog_descr *p;
290: int pid;
291: warn (LIMP,"Open prog",ETSC,1,0,programnb);
1.3 oskar 292: p = splice_getprog (programnb);
1.1 oskar 293: if (p == NULL) {
294: if (progs < MAX_OUTPROG) {
295: if ((pid = findapid (PMT_STREAM)) > 0) {
296: if ((p = malloc(sizeof(prog_descr))) != NULL) {
297: p->program_number = programnb;
298: p->pcr_pid = -1;
299: p->pmt_pid = pid;
300: p->pmt_conticnt = 0;
301: p->pmt_version = 0;
302: p->changed = TRUE;
303: p->pat_section = 0; /* more ? */
304: p->streams = 0;
1.13 oskar 305: p->stump = splice_getstumps (programnb,-1);
1.1 oskar 306: prog[progs++] = p;
307: changed_pat = TRUE;
1.9 oskar 308: configuration_changed = TRUE;
1.1 oskar 309: } else {
310: outs[pid] = NULL;
311: warn (LERR,"Open prog",ETSC,1,1,0);
312: }
313: }
314: } else {
315: warn (LERR,"Max prog open",ETSC,1,2,0);
316: }
317: }
318: return (p);
319: }
320:
321: void splice_closeprog (prog_descr *p)
322: {
323: int i, n;
324: warn (LIMP,"Close prog",ETSC,3,0,p->program_number);
1.9 oskar 325: configuration_changed = TRUE;
1.1 oskar 326: while (p->streams > 0) {
1.3 oskar 327: unlink_streamprog (p->stream[0],p);
1.1 oskar 328: }
1.13 oskar 329: releasechain (stump_descr,p->stump);
1.1 oskar 330: n = -1;
331: if (p->pmt_pid >= 0) {
332: i = progs;
333: while (--i >= 0) {
334: if (prog[i]->pmt_pid == p->pmt_pid) {
335: n += 1;
336: }
337: }
338: }
339: i = progs;
340: while (--i >= 0) {
341: if (prog[i] == p) {
342: prog[i] = prog[--progs];
343: if (n == 0) {
344: outs[p->pmt_pid] = NULL;
345: }
346: free (p);
347: changed_pat = TRUE;
348: return;
349: }
350: }
351: warn (LERR,"Close lost prog",ETSC,3,1,progs);
352: }
353:
354: int splice_addstream (prog_descr *p,
355: stream_descr *s,
356: boolean force_sid)
357: {
358: int pid = 0;
359: warn (LIMP,"Add stream",ETSC,4,force_sid,s->stream_id);
360: if (p->streams < MAX_STRPERPRG) {
361: if ((pid = findapid (s)) > 0) {
362: if (!force_sid) {
1.3 oskar 363: s->stream_id = splice_findfreestreamid (p,s->stream_id);
1.1 oskar 364: }
365: p->stream[p->streams++] = s;
366: p->changed = TRUE;
367: s->u.d.pid = pid;
1.9 oskar 368: configuration_changed = TRUE;
1.1 oskar 369: }
370: }
371: return (pid);
372: }
373:
374: boolean splice_delstream (prog_descr *p,
375: stream_descr *s)
376: {
377: int i;
378: warn (LIMP,"Del stream",ETSC,5,0,s->u.d.pid);
1.9 oskar 379: configuration_changed = TRUE;
1.1 oskar 380: i = p->streams;
381: while (--i >= 0) {
382: if (p->stream[i] == s) {
383: outs[s->u.d.pid] = NULL;
384: p->stream[i] = p->stream[--(p->streams)];
385: p->changed = TRUE;
386: if (p->pcr_pid == s->u.d.pid) {
387: p->pcr_pid = -1;
388: }
389: s->u.d.pid = 0;
390: return (TRUE);
391: }
392: }
393: warn (LERR,"Del lost stream",ETSC,5,1,p->streams);
394: return (FALSE);
395: }
396:
1.7 oskar 397: void process_finish (void)
398: {
399: warn (LIMP,"Finish",ETSC,6,0,0);
400: }
401:
1.1 oskar 402: static int make_patsection (int section,
403: byte *dest)
404: {
405: int i;
406: byte *d;
407: d = dest;
408: *d++ = TS_TABLEID_PAT;
409: d += 2;
410: *d++ = transportstreamid >> 8;
411: *d++ = (byte)transportstreamid;
412: *d++ = 0xC0 | 0x01 | (nextpat_version << 1);
413: *d++ = section;
414: *d++ = last_patsection;
415: i = progs;
416: while (--i >= 0) {
417: if (prog[i]->pat_section == section) {
418: int x;
419: x = prog[i]->program_number;
420: *d++ = (x >> 8);
421: *d++ = x;
422: x = prog[i]->pmt_pid;
423: *d++ = 0xE0 | (x >> 8);
424: *d++ = x;
425: }
426: }
427: i = d + CRC_SIZE - dest - TS_TRANSPORTID;
428: dest[TS_SECTIONLEN] = 0xB0 | (i >> 8);
429: dest[TS_SECTIONLEN+1] = i;
430: crc32_calc (dest,i + TS_TRANSPORTID - CRC_SIZE,d);
431: return (i + TS_TRANSPORTID);
432: }
433:
434: static int make_pmtsection (stream_descr *s,
435: prog_descr *p,
436: byte *dest)
437: {
438: int i;
439: byte *d;
1.13 oskar 440: stump_descr *st;
1.1 oskar 441: p->changed = FALSE;
442: d = dest;
443: *d++ = TS_TABLEID_PMT;
444: d += 2;
445: i = p->program_number;
446: *d++ = (i >> 8);
447: *d++ = i;
448: *d++ = 0xC0 | 0x01 | (p->pmt_version << 1);
449: p->pmt_version = (p->pmt_version+1) & 0x1F;
450: *d++ = 0;
451: *d++ = 0;
452: if (p->pcr_pid < 0) {
453: stream_descr *pcrs;
1.3 oskar 454: pcrs = splice_findpcrstream (p);
1.1 oskar 455: if (pcrs == NULL) {
456: pcrs = s;
457: }
458: pcrs->u.d.has_clockref = TRUE;
459: pcrs->u.d.next_clockref = msec_now () - MAX_MSEC_PCRDIST;
460: p->pcr_pid = pcrs->u.d.pid;
1.9 oskar 461: configuration_changed = TRUE;
1.1 oskar 462: }
463: i = p->pcr_pid;
464: *d++ = 0xE0 | (i >> 8);
465: *d++ = i;
466: d += 2;
1.13 oskar 467: if (s->fdescr->content == ct_program) {
1.14 ! oskar 468: i = NUMBER_DESCR;
1.13 oskar 469: while (--i > 0) {
1.1 oskar 470: byte *y;
1.13 oskar 471: y = s->fdescr->u.ps.stream[0]->manudescr->refx[i];
472: if (y == NULL) {
473: y = s->fdescr->u.ps.stream[0]->autodescr->refx[i]; /* this one? why? */
474: }
1.1 oskar 475: if (y != NULL) {
476: memcpy (d,y,y[1]+2);
477: d += y[1]+2;
478: }
479: }
480: }
481: i = d - dest - (TS_PMT_PILEN+2);
482: dest[TS_PMT_PILEN] = 0xF0 | (i >> 8);
483: dest[TS_PMT_PILEN+1] = i;
484: i = p->streams;
485: while (--i >= 0) {
486: if (p->stream[i]->u.d.mention) {
487: int x;
488: byte *e;
489: *d++ = p->stream[i]->stream_type;
490: x = p->stream[i]->u.d.pid;
491: *d++ = 0xE0 | (x >> 8);
492: *d++ = x;
493: d += 2;
494: e = d;
1.14 ! oskar 495: x = NUMBER_DESCR;
1.1 oskar 496: while (--x > 0) {
497: byte *y;
1.13 oskar 498: y = p->stream[i]->manudescr->refx[x];
499: if (y == NULL) {
500: y = p->stream[i]->autodescr->refx[x];
501: }
1.1 oskar 502: if (y != NULL) {
503: memcpy (d,y,y[1]+2);
504: d += y[1]+2;
505: }
506: }
507: x = d - e;
508: *--e = x;
509: *--e = 0xF0 | (x >> 8);
510: }
1.13 oskar 511: }
512: st = p->stump;
513: while (st != NULL) {
514: int x;
515: byte *e;
516: *d++ = st->stream_type;
517: x = st->pid;
518: *d++ = 0xE0 | (x >> 8);
519: *d++ = x;
520: d += 2;
521: e = d;
1.14 ! oskar 522: x = NUMBER_DESCR;
1.13 oskar 523: while (--x > 0) {
524: byte *y;
525: y = st->manudescr.refx[x];
526: if (y != NULL) {
527: memcpy (d,y,y[1]+2);
528: d += y[1]+2;
529: }
530: }
531: x = d - e;
532: *--e = x;
533: *--e = 0xF0 | (x >> 8);
534: st = st->next;
1.1 oskar 535: }
536: i = d + CRC_SIZE - dest - TS_TRANSPORTID;
537: dest[TS_SECTIONLEN] = 0xB0 | (i >> 8);
538: dest[TS_SECTIONLEN+1] = i;
539: crc32_calc (dest,i + TS_TRANSPORTID - CRC_SIZE,d);
540: return (i + TS_TRANSPORTID);
541: }
542:
1.7 oskar 543: /* Check for generated psi data to-be-sent, select data source.
544: * If PAT or PMT needs to be rebuild, do so. If PAT or PMT is (partially)
545: * pending to be transmitted, select that to be packaged next. Otherwise
546: * select data payload. Set pid, scramble mode and PES paket size.
547: * Precondition: s!=NULL, !list_empty(s->ctrl), s->streamdata==sd_data.
548: * Input: stream s, current ctrl fifo out c.
549: * Output: *pid, *scramble, *size (PES paket ~) for the stream to generate.
550: */
551: static void procdata_check_psi (int *pid,
552: byte *scramble,
553: int *size,
554: stream_descr *s,
555: ctrl_buffer *c)
1.1 oskar 556: {
1.3 oskar 557: t_msec now;
1.1 oskar 558: if (psi_size > 0) {
1.7 oskar 559: *pid = psi_pid;
560: *scramble = 0;
561: *size = psi_size;
1.1 oskar 562: } else {
563: if (unit_start != 0) {
564: now = msec_now ();
565: if ((psi_frequency_changed)
566: || ((psi_frequency_msec > 0)
567: && ((next_psi_periodic - now) <= 0))) {
1.7 oskar 568: int l;
1.1 oskar 569: changed_pat = TRUE;
570: l = progs;
571: while (--l >= 0) {
572: prog[l]->changed = TRUE;
573: }
574: psi_frequency_changed = FALSE;
575: next_psi_periodic = now + psi_frequency_msec;
576: }
577: if (changed_pat) {
578: psi_pid = TS_PID_PAT;
579: conticnt = &pat_conticnt;
580: psi_data[0] = 0;
581: psi_size = make_patsection (pat_section,&psi_data[1]) + 1;
582: if (pat_section >= last_patsection) {
583: changed_pat = FALSE;
584: nextpat_version = (nextpat_version+1) & 0x1F;
585: pat_section = 0;
586: } else {
587: pat_section += 1;
588: }
589: psi_done = 0;
1.7 oskar 590: *pid = psi_pid;
591: *scramble = 0;
592: *size = psi_size;
1.1 oskar 593: } else {
1.7 oskar 594: int l;
1.1 oskar 595: l = s->u.d.progs;
596: while (--l >= 0) {
597: if (s->u.d.pdescr[l]->changed) {
1.7 oskar 598: int i;
599: i = s->u.d.pdescr[l]->streams;
600: while ((--i >= 0)
601: && (!s->u.d.pdescr[l]->stream[i]->u.d.mention)) {
1.1 oskar 602: }
1.7 oskar 603: if (i >= 0) {
1.1 oskar 604: psi_pid = s->u.d.pdescr[l]->pmt_pid;
605: conticnt = &s->u.d.pdescr[l]->pmt_conticnt;
606: psi_data[0] = 0;
607: psi_size = make_pmtsection (s,s->u.d.pdescr[l],&psi_data[1]) + 1;
608: psi_done = 0;
1.7 oskar 609: *pid = psi_pid;
610: *scramble = 0;
611: *size = psi_size;
612: return;
1.1 oskar 613: }
614: }
615: }
1.7 oskar 616: s->data.ptr[c->index+PES_STREAM_ID] = s->stream_id;
617: conticnt = &s->conticnt;
618: *pid = s->u.d.pid;
619: *scramble = c->scramble;
620: *size = c->length;
1.1 oskar 621: }
622: } else {
1.7 oskar 623: *pid = s->u.d.pid;
624: *scramble = c->scramble;
625: *size = c->length;
1.1 oskar 626: }
627: }
1.7 oskar 628: }
629:
630: /* Check for adaption field items to be filled in.
631: * First assume no adaption field is set and the complete packet except the
632: * header is available for payload. Then check which adaption fields have
633: * to be set and decrease the free space accordingly.
634: * Precondition: s!=NULL, !list_empty(s->ctrl), s->streamdata==sd_data.
635: * Input: stream s, current ctrl fifo out c.
636: * Output: *adapt_flags1, *adapt_flags2, *adapt_ext_len.
637: * Return: number of bytes of free space available for payload.
638: */
639: static int procdata_adaptfield_flags (byte *adapt_flags1,
640: byte *adapt_flags2,
641: int *adapt_ext_len,
642: stream_descr *s,
643: ctrl_buffer *c)
644: {
645: int space;
646: *adapt_ext_len = 1;
647: *adapt_flags2 = 0;
648: *adapt_flags1 = 0;
649: space = TS_PACKET_SIZE - TS_PACKET_HEADSIZE;
1.1 oskar 650: if ((psi_size <= 0)
651: && (s->u.d.discontinuity)) { /* o, not for contents, but PCR-disco ? */
652: s->u.d.discontinuity = FALSE;
1.7 oskar 653: *adapt_flags1 |= TS_ADAPT_DISCONTI;
1.1 oskar 654: }
655: if (0) {
1.7 oskar 656: *adapt_flags1 |= TS_ADAPT_RANDOMAC;
1.1 oskar 657: }
658: if (0) {
1.7 oskar 659: *adapt_flags1 |= TS_ADAPT_PRIORITY;
1.1 oskar 660: }
661: if ((psi_size <= 0)
662: && (s->u.d.has_clockref)
663: && ((c->pcr.valid)
1.2 oskar 664: || (s->u.d.next_clockref - (c->msecpush + s->u.d.delta) <= 0))) {
1.7 oskar 665: *adapt_flags1 |= TS_ADAPT_PCRFLAG;
666: space -= 6;
1.1 oskar 667: }
668: if ((psi_size <= 0)
1.4 oskar 669: && ((c->opcr.valid)
670: || ((!s->u.d.has_opcr)
671: && (c->pcr.valid)))) {
1.7 oskar 672: *adapt_flags1 |= TS_ADAPT_OPCRFLAG;
673: space -= 6;
1.1 oskar 674: }
675: if (0) {
1.7 oskar 676: *adapt_flags1 |= TS_ADAPT_SPLICING;
677: space -= 1;
1.1 oskar 678: }
679: if (0) {
1.7 oskar 680: int privdata;
681: *adapt_flags1 |= TS_ADAPT_TPRIVATE;
1.1 oskar 682: privdata = 0;
1.7 oskar 683: space -= (privdata + 1);
1.1 oskar 684: }
685: if (0) {
1.7 oskar 686: *adapt_flags2 |= TS_ADAPT2_LTWFLAG;
687: *adapt_ext_len += 2;
1.1 oskar 688: }
689: if (0) {
1.7 oskar 690: *adapt_flags2 |= TS_ADAPT2_PIECEWRF;
691: *adapt_ext_len += 3;
1.1 oskar 692: }
693: if (0) {
1.7 oskar 694: *adapt_flags2 |= TS_ADAPT2_SEAMLESS;
695: *adapt_ext_len += 5;
1.1 oskar 696: }
1.7 oskar 697: if (*adapt_flags2 != 0) {
698: *adapt_flags1 |= TS_ADAPT_EXTENSIO;
699: space -= *adapt_ext_len;
1.1 oskar 700: }
1.7 oskar 701: if (*adapt_flags1 != 0) {
702: space -= 2;
1.1 oskar 703: }
1.7 oskar 704: return (space);
705: }
706:
707: /* Adjust size of adaption field against size of payload. Set flags.
708: * Input: *space (number of bytes of free space available for payload),
709: * *adapt_flags1, size (number of bytes left to be sent).
710: * Output: *space (corrected in case of padding is done via adaption field),
711: * *adapt_field_ctrl.
712: * Return: Number of bytes of payload to be inserted into THIS packet.
713: */
714: static int procdata_adaptfield_frame (int *space,
715: byte *adapt_field_ctrl,
716: byte adapt_flags1,
717: int size)
718: {
719: int payload;
720: if (size < *space) {
721: payload = size;
1.1 oskar 722: if (adapt_flags1 == 0) {
1.7 oskar 723: *space -= 1;
724: if (*space > payload) {
725: *space -= 1;
1.1 oskar 726: }
727: }
1.7 oskar 728: *adapt_field_ctrl = TS_AFC_BOTH;
1.1 oskar 729: } else {
1.7 oskar 730: payload = *space;
731: if (payload == 0) {
732: *adapt_field_ctrl = TS_AFC_ADAPT;
1.1 oskar 733: } else if (adapt_flags1 == 0) {
1.7 oskar 734: *adapt_field_ctrl = TS_AFC_PAYLD;
1.1 oskar 735: } else {
1.7 oskar 736: *adapt_field_ctrl = TS_AFC_BOTH;
1.1 oskar 737: }
738: }
1.7 oskar 739: return (payload);
740: }
741:
742: /* Generate packet header.
743: * Keep track of continuity counter (which is selected in procdata_check_psi).
744: * Precondition: d!=NULL (data destination).
745: * Input: pid, scramble, adaption_field_ctrl.
746: * Return: d (increased by header size).
747: */
748: static byte *procdata_syn_head (byte *d,
749: int pid,
750: byte scramble,
751: byte adapt_field_ctrl)
752: {
1.1 oskar 753: *d++ = TS_SYNC_BYTE;
1.7 oskar 754: warn (LSEC,"Splice unitstart",ETSC,7,1,unit_start);
755: warn (LSEC,"Splice PID",ETSC,7,2,pid);
1.1 oskar 756: *d++ = (0 << 7) /* transport_error_indicator */
757: | unit_start
758: | (0 << 5) /* transport_priority */
759: | (pid >> 8);
760: *d++ = pid;
761: *d++ = (scramble << 6)
762: | adapt_field_ctrl
763: | *conticnt;
1.7 oskar 764: warn (LSEC,"Splice continuity cnt",ETSC,7,3,*conticnt);
1.1 oskar 765: if (adapt_field_ctrl & TS_AFC_PAYLD) {
766: *conticnt = (*conticnt+1) & 0x0F;
767: }
1.7 oskar 768: return (d);
769: }
770:
771: /* Generate adpation field.
772: * This MUST match the calculations in procdata_adaptfield_flags.
773: * Precondition: s!=NULL.
774: * Input: s (stream), c (current ctrl fifo out), d (data destination),
775: * padding (number of padding bytes needed), payload (number of payload bytes
776: * to insert), adapt_field_ctrl, adapt_flags1, adapt_flags2, adapt_ext_len.
777: * Return: d (increased by adaption field size).
778: */
779: static byte *procdata_syn_adaptfield (stream_descr *s,
780: ctrl_buffer *c,
781: byte *d,
782: int padding,
783: int payload,
784: byte adapt_field_ctrl,
785: byte adapt_flags1,
786: byte adapt_flags2,
787: int adapt_ext_len)
788: {
1.1 oskar 789: if (adapt_field_ctrl & TS_AFC_ADAPT) {
1.7 oskar 790: if ((*d++ = (TS_PACKET_SIZE - TS_PACKET_FLAGS1) - payload) != 0) {
1.1 oskar 791: *d++ = adapt_flags1;
792: if (adapt_flags1 & TS_ADAPT_PCRFLAG) {
793: clockref pcr;
1.2 oskar 794: msec2cref (&s->u.d.conv,c->msecpush + s->u.d.delta,&pcr);
1.1 oskar 795: *d++ = (pcr.base >> 25) | (pcr.ba33 << 7);
796: *d++ = pcr.base >> 17;
797: *d++ = pcr.base >> 9;
798: *d++ = pcr.base >> 1;
799: *d++ = (pcr.base << 7) | (pcr.ext >> 8) | 0x7E;
800: *d++ = pcr.ext;
801: s->u.d.next_clockref =
1.2 oskar 802: (c->msecpush + s->u.d.delta) + MAX_MSEC_PCRDIST;
1.1 oskar 803: c->pcr.valid = FALSE;
804: }
805: if (adapt_flags1 & TS_ADAPT_OPCRFLAG) {
1.4 oskar 806: clockref *opcr;
807: if (c->opcr.valid) {
808: opcr = &c->opcr;
809: } else {
810: opcr = &c->pcr;
811: }
812: *d++ = (opcr->base >> 25) | (opcr->ba33 << 7);
813: *d++ = opcr->base >> 17;
814: *d++ = opcr->base >> 9;
815: *d++ = opcr->base >> 1;
816: *d++ = (opcr->base << 7) | (opcr->ext >> 8) | 0x7E;
817: *d++ = opcr->ext;
818: opcr->valid = FALSE;
1.1 oskar 819: }
820: if (adapt_flags1 & TS_ADAPT_SPLICING) {
821: }
822: if (adapt_flags1 & TS_ADAPT_TPRIVATE) {
823: }
824: if (adapt_flags1 & TS_ADAPT_EXTENSIO) {
825: *d++ = adapt_ext_len;
826: *d++ = adapt_flags2 | 0x1F;
1.5 oskar 827: if (adapt_flags2 & TS_ADAPT2_LTWFLAG) {
1.1 oskar 828: }
1.5 oskar 829: if (adapt_flags2 & TS_ADAPT2_PIECEWRF) {
1.1 oskar 830: }
1.5 oskar 831: if (adapt_flags2 & TS_ADAPT2_SEAMLESS) {
1.1 oskar 832: }
833: }
834: }
1.7 oskar 835: if (padding > 0) {
836: warn (LSEC,"Splice padding",ETSC,8,1,padding);
837: memset (d,-1,padding);
838: d += padding;
1.1 oskar 839: }
840: }
1.7 oskar 841: return (d);
842: }
843:
844: /* Generate payload portion.
845: * Insert the appropriate payload (either PSI or data), check whether payload
846: * from this PES packet or section is left.
847: * Precondition: s!=NULL.
848: * Input: s (stream), c (current ctrl fifo out), d (data destination),
849: * payload (number of payload bytes to insert).
850: * Return: processed stream s, if there is more data from the current PES
851: * packet to be processed, NULL otherwise.
852: */
853: static stream_descr *procdata_syn_payload (stream_descr *s,
854: ctrl_buffer *c,
855: byte *d,
856: int payload)
857: {
858: if (payload > 0) {
1.1 oskar 859: if (psi_size > 0) {
1.7 oskar 860: memcpy (d,&psi_data[psi_done],payload);
861: if (payload < psi_size) {
862: warn (LSEC,"Splice PSI Data",ETSC,9,s->stream_id,payload);
863: psi_done += payload;
864: psi_size -= payload;
1.1 oskar 865: unit_start = 0;
866: } else {
1.7 oskar 867: warn (LINF,"Splice PSI Done",ETSC,9,s->stream_id,payload);
1.1 oskar 868: psi_done = psi_size = 0;
869: unit_start = TS_UNIT_START;
870: }
871: } else {
1.7 oskar 872: memcpy (d,&s->data.ptr[c->index],payload);
873: if (payload < c->length) {
874: warn (LSEC,"Splice Data",ETSC,9,s->stream_id,payload);
875: c->length -= payload;
876: s->data.out = (c->index += payload);
1.1 oskar 877: unit_start = 0;
878: } else {
1.7 oskar 879: warn (LINF,"Splice Done",ETSC,9,s->stream_id,payload);
1.1 oskar 880: list_incr (s->ctrl.out,s->ctrl,1);
881: if (list_empty (s->ctrl)) {
882: s->data.out = s->data.in;
883: } else {
884: s->data.out = s->ctrl.ptr[s->ctrl.out].index;
885: }
886: unit_start = TS_UNIT_START;
1.7 oskar 887: return (NULL);
1.1 oskar 888: }
889: }
890: }
891: return (s);
1.7 oskar 892: }
893:
894: /* Process unparsed si data and generate output.
895: * Take one TS paket, copy it to output stream data buffer.
896: * Precondition: s!=NULL, !list_empty(s->ctrl), s->streamdata==sd_unparsedsi,
897: * s->ctrl.ptr[s->ctrl.out].length==TS_PACKET_SIZE, d!=NULL.
898: */
899: static void proc_unparsedsi (stream_descr *s,
900: byte *d)
901: {
1.12 oskar 902: warn (LINF,"Splice Unparsed SI",ETSC,10,s->streamdata,s->u.usi.delta);
903: warn (LDEB,"Splice Unparsed SI",ETSC,10,s->stream_id,s->sourceid);
1.7 oskar 904: memcpy (d,&s->data.ptr[s->ctrl.ptr[s->ctrl.out].index],TS_PACKET_SIZE);
905: /* check if == s->ctrl.ptr[s->ctrl.out].length); ? */
906: list_incr (s->ctrl.out,s->ctrl,1);
907: if (list_empty (s->ctrl)) {
1.12 oskar 908: s->data.out = s->data.in;
1.10 oskar 909: input_closefileifunused (s->fdescr);
1.7 oskar 910: } else {
911: s->data.out = s->ctrl.ptr[s->ctrl.out].index;
912: }
913: }
914:
915: stream_descr *process_something (stream_descr *s)
916: {
917: byte *d;
918: int pid;
919: byte scramble;
920: int size;
921: ctrl_buffer *c;
922: int payload;
923: int space;
924: int adapt_ext_len;
925: byte adapt_field_ctrl;
926: byte adapt_flags1, adapt_flags2;
927: warn (LDEB,"Splice TS",ETSC,0,0,s->ctrl.out);
928: switch (s->streamdata) {
929: case sd_data:
930: c = &s->ctrl.ptr[s->ctrl.out];
931: procdata_check_psi (&pid, &scramble, &size, s, c);
932: d = output_pushdata (TS_PACKET_SIZE,c->msecpush + s->u.d.delta);
933: if (d == NULL) {
934: return (s);
935: }
936: space = procdata_adaptfield_flags (&adapt_flags1, &adapt_flags2,
937: &adapt_ext_len, s, c);
1.8 oskar 938: payload = procdata_adaptfield_frame (&space, &adapt_field_ctrl,
939: adapt_flags1, size);
1.7 oskar 940: d = procdata_syn_head (d, pid, scramble, adapt_field_ctrl);
1.8 oskar 941: d = procdata_syn_adaptfield (s, c, d, space-payload, payload,
942: adapt_field_ctrl, adapt_flags1, adapt_flags2, adapt_ext_len);
1.7 oskar 943: return (procdata_syn_payload (s, c, d, payload));
944: break;
945: case sd_map:
946: validate_mapref (s);
947: return (NULL);
948: break;
949: case sd_unparsedsi:
950: c = &s->ctrl.ptr[s->ctrl.out];
951: d = output_pushdata (TS_PACKET_SIZE,c->msecpush + s->u.usi.delta);
952: if (d == NULL) {
953: return (s);
954: }
955: proc_unparsedsi (s,d);
956: return (NULL);
957: break;
958: default:
959: return (NULL);
960: break;
961: }
1.1 oskar 962: }
963:
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