Annotation of multiplexer/splicets.c, revision 1.19
1.1 oskar 1: /*
2: * ISO 13818 stream multiplexer
3: * Copyright (C) 2001 Convergence Integrated Media GmbH Berlin
1.18 oskar 4: * Author: Oskar Schirmer (oskar@scara.com)
1.19 ! oskar 5: *
! 6: * This program is free software; you can redistribute it and/or modify
! 7: * it under the terms of the GNU General Public License as published by
! 8: * the Free Software Foundation; either version 2 of the License, or
! 9: * (at your option) any later version.
! 10: *
! 11: * This program is distributed in the hope that it will be useful,
! 12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
! 13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 14: * GNU General Public License for more details.
! 15: *
! 16: * You should have received a copy of the GNU General Public License
! 17: * along with this program; if not, write to the Free Software
! 18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.1 oskar 19: */
20:
21: /*
22: * Module: Splice TS
23: * Purpose: Generate transport stream.
24: *
25: * This module generates from the available input stream data (as
26: * seperated by the split functions) the complete output stream.
27: * It provides functions to handle programs for the resulting stream,
28: * as these are output format dependent. Further, it accepts PSI data
29: * just in time, validating it not earlier than with the arrival of
30: * the corresponding payload at this stage.
31: */
32:
33: #include "global.h"
34: #include "crc.h"
35: #include "error.h"
36: #include "input.h"
37: #include "output.h"
38: #include "descref.h"
1.6 oskar 39: #include "splitts.h"
1.1 oskar 40: #include "pes.h"
41: #include "ts.h"
42: #include "splice.h"
43: #include "splicets.h"
44:
45: const boolean splice_multipleprograms = TRUE;
46:
47: static boolean changed_pat;
1.16 oskar 48: static boolean unchanged_pat;
1.1 oskar 49: static int pat_section;
50: static const int last_patsection = 0;
51: static byte nextpat_version;
52: static byte pat_conticnt;
53:
54: static int transportstreamid;
55:
56: static int psi_size;
57: static int psi_done;
58: static byte psi_data [MAX_PSI_SIZE];
59:
60: static byte unit_start;
61: static byte *conticnt;
62: static int psi_pid;
63:
64: static int progs;
65: static prog_descr *prog [MAX_OUTPROG];
66:
67: static int nextpid;
68: static stream_descr *outs [MAX_STRPERTS];
69:
1.13 oskar 70: static stump_descr *globalstumps;
71:
1.9 oskar 72: boolean splice_specific_init (void)
1.1 oskar 73: {
74: progs = 0;
75: nextpid = 0;
76: memset (outs,0,sizeof(outs));
77: changed_pat = TRUE;
78: pat_section = 0;
79: nextpat_version = 0;
80: pat_conticnt = 0;
81: psi_size = psi_done = 0;
82: unit_start = TS_UNIT_START;
83: transportstreamid = 0x4227;
1.13 oskar 84: globalstumps = NULL;
1.1 oskar 85: return (TRUE);
86: }
87:
88: void splice_settransportstreamid (int tsid)
89: {
90: transportstreamid = tsid;
91: }
92:
1.11 oskar 93: void splice_setpsifrequency (t_msec freq)
1.1 oskar 94: {
95: psi_frequency_msec = freq;
96: psi_frequency_changed = TRUE;
97: }
98:
99: static int findapid (stream_descr *s)
100: {
1.13 oskar 101: byte okness = 2;
102: int h;
1.1 oskar 103: do {
1.2 oskar 104: if ((nextpid < TS_PID_SPLICELO) || (nextpid >= TS_PID_SPLICEHI)) {
1.13 oskar 105: warn (LDEB,"Next PID",ETSC,1,okness,nextpid);
106: if (okness == 0) {
1.1 oskar 107: warn (LERR,"No PID found",ETSC,2,1,0);
108: return (0);
109: }
1.13 oskar 110: okness -= 1;
1.2 oskar 111: nextpid = TS_PID_SPLICELO;
1.1 oskar 112: } else {
1.13 oskar 113: warn (LDEB,"Next PID",ETSC,2,okness,nextpid);
1.1 oskar 114: nextpid += 1;
115: }
1.13 oskar 116: if (okness != 0) {
117: h = input_tssiinafilerange (nextpid);
118: warn (LDEB,"Next PID",ETSC,3,h,nextpid);
119: if (h >= 0) {
120: nextpid = h;
121: }
122: } else {
123: h = -1;
124: }
125: } while ((h >= 0)
126: || (outs[nextpid] != NULL));
1.1 oskar 127: outs[nextpid] = s;
128: warn (LDEB,"Next PID",ETSC,2,2,nextpid);
129: return (nextpid);
130: }
131:
1.9 oskar 132: void splice_all_configuration (void)
133: {
134: int i;
1.15 oskar 135: if (configuration_must_print) {
1.9 oskar 136: i = progs;
137: fprintf (stderr, configuration_total, i);
138: while (--i >= 0) {
139: splice_one_configuration (prog[i]);
140: }
1.15 oskar 141: configuration_was_printed;
1.9 oskar 142: }
143: }
144:
1.13 oskar 145: void splice_addsirange (file_descr *f,
146: int lower,
147: int upper)
148: {
149: int i, r;
150: tssi_descr *tssi;
151: prog_descr *p;
152: tssi = malloc (sizeof (tssi_descr));
153: if (tssi != NULL) {
154: if (ts_file_stream (f,TS_UNPARSED_SI) == NULL) {
155: ts_file_stream (f,TS_UNPARSED_SI) = input_openstream (f,
156: TS_UNPARSED_SI,0,0,sd_unparsedsi,NULL);
157: }
158: if (ts_file_stream (f,TS_UNPARSED_SI) != NULL) {
159: tssi->next = f->u.ts.tssi;
160: tssi->pid_low = lower;
161: tssi->pid_high = upper;
162: f->u.ts.tssi = tssi;
163: r = upper; /* check for collision against existing PIDs, first sd_data */
164: while (r >= lower) {
165: stream_descr *s;
166: s = outs[r];
167: if ((s != NULL)
168: && (s != PMT_STREAM)) {
169: if (s->streamdata == sd_data) {
170: i = findapid (s);
171: if (input_tssiinafilerange (i) >= 0) { /* none free! */
172: outs[i] = NULL;
173: } else {
174: int j;
175: s->u.d.pid = i;
176: j = s->u.d.progs;
177: while (--j >= 0) {
178: p = s->u.d.pdescr[j];
179: p->changed = TRUE;
180: if (p->pcr_pid == r) {
181: p->pcr_pid = i;
182: }
183: }
184: configuration_changed = TRUE;
185: outs[r] = NULL;
186: }
187: } else {
188: warn (LERR,"Bad PID",ETSC,11,s->streamdata,r);
189: }
190: }
191: r -= 1;
192: }
193: i = progs; /* ...then sd_map */
194: while (--i >= 0) {
195: p = prog[i];
196: r = p->pmt_pid;
197: if ((r >= lower)
198: && (r <= upper)) {
199: int q;
200: q = findapid (PMT_STREAM);
201: if (input_tssiinafilerange (q) >= 0) { /* none free! */
202: outs[q] = NULL;
203: } else {
204: int j;
205: outs[r] = NULL;
206: j = i;
207: while (--j >= 0) {
208: if (prog[j]->pmt_pid == r) {
209: prog[j]->pmt_pid = q;
210: }
211: }
212: p->pmt_pid = q;
213: changed_pat = TRUE;
214: configuration_changed = TRUE;
215: }
216: }
217: }
218: } else {
219: free (tssi);
220: }
221: }
222: }
223:
224: void splice_createstump (int programnb,
225: short pid,
226: byte styp)
227: {
228: prog_descr *p;
229: stump_descr **pst;
230: stump_descr *st;
231: p = splice_getprog (programnb);
232: if (p != NULL) {
233: configuration_changed = TRUE;
234: p->changed = TRUE;
235: pst = &(p->stump);
236: } else {
237: pst = &globalstumps;
238: }
239: st = *pst;
240: while ((st != NULL)
241: && ((st->pid != pid)
242: || (st->program_number != programnb))) {
243: st = st->next;
244: }
245: if (st == NULL) {
246: st = malloc (sizeof(stump_descr));
247: st->next = *pst;
248: st->program_number = programnb;
249: st->pid = pid;
250: *pst = st;
251: }
252: st->stream_type = styp;
253: clear_descrdescr (&(st->manudescr));
1.15 oskar 254: splice_modifycheckmatch (programnb,p,NULL,st);
1.13 oskar 255: }
256:
257: stump_descr *splice_getstumps (int programnb,
258: short pid)
259: {
260: prog_descr *p;
261: stump_descr **pst;
262: stump_descr *rl;
263: rl = NULL;
264: p = splice_getprog (programnb);
265: if (p != NULL) {
266: pst = &(p->stump);
267: } else {
268: pst = &globalstumps;
269: }
270: while (*pst != NULL) {
271: stump_descr *st;
272: st = *pst;
273: if ((st->program_number == programnb)
274: && ((pid < 0)
275: || (pid == st->pid))) {
276: st = *pst;
277: *pst = st->next;
278: st->next = rl;
279: rl = st;
280: if (p != NULL) {
281: configuration_changed = TRUE;
282: p->changed = TRUE;
283: }
284: } else {
285: pst = &((*pst)->next);
286: }
287: }
288: return (rl);
289: }
290:
1.15 oskar 291: void splice_modifytargetdescriptor (int programnb,
292: short sid,
293: short pid,
294: int dtag,
295: int dlength,
296: byte *data)
297: {
298: int i;
299: if (programnb < 0) {
300: i = progs;
301: while (--i >= 0) {
302: splice_modifytargetdescrprog (prog[i],
303: prog[i]->program_number,-1,0,-1,-1,NULL,globalstumps);
304: }
305: splice_modifytargetdescrprog (NULL,-1,-1,0,-1,-1,NULL,globalstumps);
306: } else {
307: splice_modifytargetdescrprog (splice_getprog (programnb),
308: programnb,sid,pid,dtag,dlength,data,globalstumps);
309: }
310: }
311:
1.3 oskar 312: prog_descr *splice_getprog (int programnb)
313: {
314: int i;
315: i = progs;
316: while (--i >= 0) {
317: if (prog[i]->program_number == programnb) {
318: return (prog[i]);
319: }
320: }
321: return (NULL);
322: }
323:
1.1 oskar 324: prog_descr *splice_openprog (int programnb)
325: {
326: prog_descr *p;
327: int pid;
328: warn (LIMP,"Open prog",ETSC,1,0,programnb);
1.3 oskar 329: p = splice_getprog (programnb);
1.1 oskar 330: if (p == NULL) {
331: if (progs < MAX_OUTPROG) {
332: if ((pid = findapid (PMT_STREAM)) > 0) {
333: if ((p = malloc(sizeof(prog_descr))) != NULL) {
334: p->program_number = programnb;
335: p->pcr_pid = -1;
336: p->pmt_pid = pid;
337: p->pmt_conticnt = 0;
338: p->pmt_version = 0;
339: p->changed = TRUE;
340: p->pat_section = 0; /* more ? */
341: p->streams = 0;
1.13 oskar 342: p->stump = splice_getstumps (programnb,-1);
1.15 oskar 343: clear_descrdescr (&p->manudescr);
1.1 oskar 344: prog[progs++] = p;
345: changed_pat = TRUE;
1.9 oskar 346: configuration_changed = TRUE;
1.15 oskar 347: splice_modifycheckmatch (programnb,p,NULL,NULL);
1.1 oskar 348: } else {
349: outs[pid] = NULL;
350: warn (LERR,"Open prog",ETSC,1,1,0);
351: }
352: }
353: } else {
354: warn (LERR,"Max prog open",ETSC,1,2,0);
355: }
356: }
357: return (p);
358: }
359:
360: void splice_closeprog (prog_descr *p)
361: {
362: int i, n;
363: warn (LIMP,"Close prog",ETSC,3,0,p->program_number);
1.9 oskar 364: configuration_changed = TRUE;
1.1 oskar 365: while (p->streams > 0) {
1.3 oskar 366: unlink_streamprog (p->stream[0],p);
1.1 oskar 367: }
1.13 oskar 368: releasechain (stump_descr,p->stump);
1.1 oskar 369: n = -1;
370: if (p->pmt_pid >= 0) {
371: i = progs;
372: while (--i >= 0) {
373: if (prog[i]->pmt_pid == p->pmt_pid) {
374: n += 1;
375: }
376: }
377: }
378: i = progs;
379: while (--i >= 0) {
380: if (prog[i] == p) {
381: prog[i] = prog[--progs];
382: if (n == 0) {
383: outs[p->pmt_pid] = NULL;
384: }
385: free (p);
386: changed_pat = TRUE;
387: return;
388: }
389: }
390: warn (LERR,"Close lost prog",ETSC,3,1,progs);
391: }
392:
393: int splice_addstream (prog_descr *p,
394: stream_descr *s,
395: boolean force_sid)
396: {
397: int pid = 0;
398: warn (LIMP,"Add stream",ETSC,4,force_sid,s->stream_id);
399: if (p->streams < MAX_STRPERPRG) {
400: if ((pid = findapid (s)) > 0) {
401: if (!force_sid) {
1.3 oskar 402: s->stream_id = splice_findfreestreamid (p,s->stream_id);
1.1 oskar 403: }
404: p->stream[p->streams++] = s;
405: p->changed = TRUE;
406: s->u.d.pid = pid;
1.9 oskar 407: configuration_changed = TRUE;
1.15 oskar 408: splice_modifycheckmatch (p->program_number,p,s,NULL);
1.1 oskar 409: }
410: }
411: return (pid);
412: }
413:
414: boolean splice_delstream (prog_descr *p,
415: stream_descr *s)
416: {
417: int i;
418: warn (LIMP,"Del stream",ETSC,5,0,s->u.d.pid);
1.9 oskar 419: configuration_changed = TRUE;
1.1 oskar 420: i = p->streams;
421: while (--i >= 0) {
422: if (p->stream[i] == s) {
423: outs[s->u.d.pid] = NULL;
424: p->stream[i] = p->stream[--(p->streams)];
425: p->changed = TRUE;
426: if (p->pcr_pid == s->u.d.pid) {
427: p->pcr_pid = -1;
428: }
429: s->u.d.pid = 0;
430: return (TRUE);
431: }
432: }
433: warn (LERR,"Del lost stream",ETSC,5,1,p->streams);
434: return (FALSE);
435: }
436:
1.7 oskar 437: void process_finish (void)
438: {
439: warn (LIMP,"Finish",ETSC,6,0,0);
440: }
441:
1.1 oskar 442: static int make_patsection (int section,
443: byte *dest)
444: {
445: int i;
446: byte *d;
1.17 oskar 447: prog_descr *p;
1.1 oskar 448: d = dest;
449: *d++ = TS_TABLEID_PAT;
450: d += 2;
451: *d++ = transportstreamid >> 8;
452: *d++ = (byte)transportstreamid;
453: *d++ = 0xC0 | 0x01 | (nextpat_version << 1);
454: *d++ = section;
455: *d++ = last_patsection;
456: i = progs;
457: while (--i >= 0) {
1.17 oskar 458: p = prog[i];
459: if (p->pat_section == section) {
1.1 oskar 460: int x;
1.17 oskar 461: x = p->program_number;
1.1 oskar 462: *d++ = (x >> 8);
463: *d++ = x;
1.17 oskar 464: x = p->pmt_pid;
1.1 oskar 465: *d++ = 0xE0 | (x >> 8);
466: *d++ = x;
467: }
468: }
469: i = d + CRC_SIZE - dest - TS_TRANSPORTID;
470: dest[TS_SECTIONLEN] = 0xB0 | (i >> 8);
471: dest[TS_SECTIONLEN+1] = i;
472: crc32_calc (dest,i + TS_TRANSPORTID - CRC_SIZE,d);
473: return (i + TS_TRANSPORTID);
474: }
475:
476: static int make_pmtsection (stream_descr *s,
477: prog_descr *p,
478: byte *dest)
479: {
480: int i;
481: byte *d;
1.13 oskar 482: stump_descr *st;
1.17 oskar 483: stream_descr *t;
1.1 oskar 484: d = dest;
485: *d++ = TS_TABLEID_PMT;
486: d += 2;
487: i = p->program_number;
488: *d++ = (i >> 8);
489: *d++ = i;
490: *d++ = 0xC0 | 0x01 | (p->pmt_version << 1);
491: *d++ = 0;
492: *d++ = 0;
493: if (p->pcr_pid < 0) {
494: stream_descr *pcrs;
1.3 oskar 495: pcrs = splice_findpcrstream (p);
1.1 oskar 496: if (pcrs == NULL) {
497: pcrs = s;
498: }
499: pcrs->u.d.has_clockref = TRUE;
500: pcrs->u.d.next_clockref = msec_now () - MAX_MSEC_PCRDIST;
501: p->pcr_pid = pcrs->u.d.pid;
1.9 oskar 502: configuration_changed = TRUE;
1.1 oskar 503: }
504: i = p->pcr_pid;
505: *d++ = 0xE0 | (i >> 8);
506: *d++ = i;
507: d += 2;
1.15 oskar 508: i = NUMBER_DESCR;
1.17 oskar 509: while (--i >= 0) {
1.15 oskar 510: byte *y;
511: y = p->manudescr.refx[i];
512: if ((y == NULL)
513: && (s->u.d.mapstream != NULL)) {
514: y = s->u.d.mapstream->autodescr->refx[i]; /* why this one? */
515: }
516: if (y != NULL) {
517: int yl = y[1];
518: if (yl != 0) {
519: yl += 2;
520: memcpy (d,y,yl);
521: d += yl;
1.1 oskar 522: }
523: }
524: }
525: i = d - dest - (TS_PMT_PILEN+2);
526: dest[TS_PMT_PILEN] = 0xF0 | (i >> 8);
527: dest[TS_PMT_PILEN+1] = i;
528: i = p->streams;
529: while (--i >= 0) {
1.17 oskar 530: t = p->stream[i];
531: if (t->u.d.mention) {
1.1 oskar 532: int x;
533: byte *e;
1.17 oskar 534: *d++ = t->stream_type;
535: x = t->u.d.pid;
1.1 oskar 536: *d++ = 0xE0 | (x >> 8);
537: *d++ = x;
538: d += 2;
539: e = d;
1.14 oskar 540: x = NUMBER_DESCR;
1.17 oskar 541: while (--x >= 0) {
1.1 oskar 542: byte *y;
1.17 oskar 543: y = t->manudescr->refx[x];
1.13 oskar 544: if (y == NULL) {
1.17 oskar 545: y = t->autodescr->refx[x];
1.13 oskar 546: }
1.1 oskar 547: if (y != NULL) {
1.15 oskar 548: int yl = y[1];
549: if (yl != 0) {
550: yl += 2;
551: memcpy (d,y,yl);
552: d += yl;
553: }
1.1 oskar 554: }
555: }
556: x = d - e;
557: *--e = x;
558: *--e = 0xF0 | (x >> 8);
559: }
1.13 oskar 560: }
561: st = p->stump;
562: while (st != NULL) {
563: int x;
564: byte *e;
565: *d++ = st->stream_type;
566: x = st->pid;
567: *d++ = 0xE0 | (x >> 8);
568: *d++ = x;
569: d += 2;
570: e = d;
1.14 oskar 571: x = NUMBER_DESCR;
1.17 oskar 572: while (--x >= 0) {
1.13 oskar 573: byte *y;
574: y = st->manudescr.refx[x];
575: if (y != NULL) {
1.15 oskar 576: int yl = y[1];
577: if (yl != 0) {
578: yl += 2;
579: memcpy (d,y,yl);
580: d += yl;
581: }
1.13 oskar 582: }
583: }
584: x = d - e;
585: *--e = x;
586: *--e = 0xF0 | (x >> 8);
587: st = st->next;
1.1 oskar 588: }
589: i = d + CRC_SIZE - dest - TS_TRANSPORTID;
590: dest[TS_SECTIONLEN] = 0xB0 | (i >> 8);
591: dest[TS_SECTIONLEN+1] = i;
592: crc32_calc (dest,i + TS_TRANSPORTID - CRC_SIZE,d);
593: return (i + TS_TRANSPORTID);
594: }
595:
1.7 oskar 596: /* Check for generated psi data to-be-sent, select data source.
597: * If PAT or PMT needs to be rebuild, do so. If PAT or PMT is (partially)
598: * pending to be transmitted, select that to be packaged next. Otherwise
599: * select data payload. Set pid, scramble mode and PES paket size.
600: * Precondition: s!=NULL, !list_empty(s->ctrl), s->streamdata==sd_data.
601: * Input: stream s, current ctrl fifo out c.
602: * Output: *pid, *scramble, *size (PES paket ~) for the stream to generate.
603: */
604: static void procdata_check_psi (int *pid,
605: byte *scramble,
606: int *size,
607: stream_descr *s,
608: ctrl_buffer *c)
1.1 oskar 609: {
1.3 oskar 610: t_msec now;
1.16 oskar 611: int i, l;
612: prog_descr *p;
1.1 oskar 613: if (psi_size > 0) {
1.7 oskar 614: *pid = psi_pid;
615: *scramble = 0;
616: *size = psi_size;
1.1 oskar 617: } else {
618: if (unit_start != 0) {
619: now = msec_now ();
620: if ((psi_frequency_changed)
621: || ((psi_frequency_msec > 0)
622: && ((next_psi_periodic - now) <= 0))) {
1.16 oskar 623: unchanged_pat = TRUE;
1.1 oskar 624: l = progs;
625: while (--l >= 0) {
1.16 oskar 626: prog[l]->unchanged = TRUE;
1.1 oskar 627: }
628: psi_frequency_changed = FALSE;
629: next_psi_periodic = now + psi_frequency_msec;
630: }
1.16 oskar 631: if (unchanged_pat || changed_pat) {
1.1 oskar 632: psi_pid = TS_PID_PAT;
633: conticnt = &pat_conticnt;
634: psi_data[0] = 0;
1.16 oskar 635: if ((pat_section == 0)
636: && (changed_pat)) {
637: nextpat_version = (nextpat_version+1) & 0x1F;
638: }
1.1 oskar 639: psi_size = make_patsection (pat_section,&psi_data[1]) + 1;
640: if (pat_section >= last_patsection) {
641: changed_pat = FALSE;
1.16 oskar 642: unchanged_pat = FALSE;
1.1 oskar 643: pat_section = 0;
644: } else {
645: pat_section += 1;
646: }
647: psi_done = 0;
1.7 oskar 648: *pid = psi_pid;
649: *scramble = 0;
650: *size = psi_size;
1.1 oskar 651: } else {
652: l = s->u.d.progs;
653: while (--l >= 0) {
1.16 oskar 654: p = s->u.d.pdescr[l];
655: if (p->unchanged || p->changed) {
656: i = p->streams;
1.7 oskar 657: while ((--i >= 0)
1.16 oskar 658: && (!p->stream[i]->u.d.mention)) {
1.1 oskar 659: }
1.7 oskar 660: if (i >= 0) {
1.16 oskar 661: psi_pid = p->pmt_pid;
662: conticnt = &p->pmt_conticnt;
1.1 oskar 663: psi_data[0] = 0;
1.16 oskar 664: if (p->changed) {
665: p->pmt_version = (p->pmt_version+1) & 0x1F;
666: }
667: psi_size = make_pmtsection (s,p,&psi_data[1]) + 1;
668: p->changed = FALSE;
669: p->unchanged = FALSE;
1.1 oskar 670: psi_done = 0;
1.7 oskar 671: *pid = psi_pid;
672: *scramble = 0;
673: *size = psi_size;
674: return;
1.1 oskar 675: }
676: }
677: }
1.7 oskar 678: s->data.ptr[c->index+PES_STREAM_ID] = s->stream_id;
679: conticnt = &s->conticnt;
680: *pid = s->u.d.pid;
681: *scramble = c->scramble;
682: *size = c->length;
1.1 oskar 683: }
684: } else {
1.7 oskar 685: *pid = s->u.d.pid;
686: *scramble = c->scramble;
687: *size = c->length;
1.1 oskar 688: }
689: }
1.7 oskar 690: }
691:
692: /* Check for adaption field items to be filled in.
693: * First assume no adaption field is set and the complete packet except the
694: * header is available for payload. Then check which adaption fields have
695: * to be set and decrease the free space accordingly.
696: * Precondition: s!=NULL, !list_empty(s->ctrl), s->streamdata==sd_data.
697: * Input: stream s, current ctrl fifo out c.
698: * Output: *adapt_flags1, *adapt_flags2, *adapt_ext_len.
699: * Return: number of bytes of free space available for payload.
700: */
701: static int procdata_adaptfield_flags (byte *adapt_flags1,
702: byte *adapt_flags2,
703: int *adapt_ext_len,
704: stream_descr *s,
705: ctrl_buffer *c)
706: {
707: int space;
708: *adapt_ext_len = 1;
709: *adapt_flags2 = 0;
710: *adapt_flags1 = 0;
711: space = TS_PACKET_SIZE - TS_PACKET_HEADSIZE;
1.1 oskar 712: if ((psi_size <= 0)
713: && (s->u.d.discontinuity)) { /* o, not for contents, but PCR-disco ? */
714: s->u.d.discontinuity = FALSE;
1.7 oskar 715: *adapt_flags1 |= TS_ADAPT_DISCONTI;
1.1 oskar 716: }
717: if (0) {
1.7 oskar 718: *adapt_flags1 |= TS_ADAPT_RANDOMAC;
1.1 oskar 719: }
720: if (0) {
1.7 oskar 721: *adapt_flags1 |= TS_ADAPT_PRIORITY;
1.1 oskar 722: }
723: if ((psi_size <= 0)
724: && (s->u.d.has_clockref)
725: && ((c->pcr.valid)
1.2 oskar 726: || (s->u.d.next_clockref - (c->msecpush + s->u.d.delta) <= 0))) {
1.7 oskar 727: *adapt_flags1 |= TS_ADAPT_PCRFLAG;
728: space -= 6;
1.1 oskar 729: }
730: if ((psi_size <= 0)
1.4 oskar 731: && ((c->opcr.valid)
732: || ((!s->u.d.has_opcr)
733: && (c->pcr.valid)))) {
1.7 oskar 734: *adapt_flags1 |= TS_ADAPT_OPCRFLAG;
735: space -= 6;
1.1 oskar 736: }
737: if (0) {
1.7 oskar 738: *adapt_flags1 |= TS_ADAPT_SPLICING;
739: space -= 1;
1.1 oskar 740: }
741: if (0) {
1.7 oskar 742: int privdata;
743: *adapt_flags1 |= TS_ADAPT_TPRIVATE;
1.1 oskar 744: privdata = 0;
1.7 oskar 745: space -= (privdata + 1);
1.1 oskar 746: }
747: if (0) {
1.7 oskar 748: *adapt_flags2 |= TS_ADAPT2_LTWFLAG;
749: *adapt_ext_len += 2;
1.1 oskar 750: }
751: if (0) {
1.7 oskar 752: *adapt_flags2 |= TS_ADAPT2_PIECEWRF;
753: *adapt_ext_len += 3;
1.1 oskar 754: }
755: if (0) {
1.7 oskar 756: *adapt_flags2 |= TS_ADAPT2_SEAMLESS;
757: *adapt_ext_len += 5;
1.1 oskar 758: }
1.7 oskar 759: if (*adapt_flags2 != 0) {
760: *adapt_flags1 |= TS_ADAPT_EXTENSIO;
761: space -= *adapt_ext_len;
1.1 oskar 762: }
1.7 oskar 763: if (*adapt_flags1 != 0) {
764: space -= 2;
1.1 oskar 765: }
1.7 oskar 766: return (space);
767: }
768:
769: /* Adjust size of adaption field against size of payload. Set flags.
770: * Input: *space (number of bytes of free space available for payload),
771: * *adapt_flags1, size (number of bytes left to be sent).
772: * Output: *space (corrected in case of padding is done via adaption field),
773: * *adapt_field_ctrl.
774: * Return: Number of bytes of payload to be inserted into THIS packet.
775: */
776: static int procdata_adaptfield_frame (int *space,
777: byte *adapt_field_ctrl,
778: byte adapt_flags1,
779: int size)
780: {
781: int payload;
782: if (size < *space) {
783: payload = size;
1.1 oskar 784: if (adapt_flags1 == 0) {
1.7 oskar 785: *space -= 1;
786: if (*space > payload) {
787: *space -= 1;
1.1 oskar 788: }
789: }
1.7 oskar 790: *adapt_field_ctrl = TS_AFC_BOTH;
1.1 oskar 791: } else {
1.7 oskar 792: payload = *space;
793: if (payload == 0) {
794: *adapt_field_ctrl = TS_AFC_ADAPT;
1.1 oskar 795: } else if (adapt_flags1 == 0) {
1.7 oskar 796: *adapt_field_ctrl = TS_AFC_PAYLD;
1.1 oskar 797: } else {
1.7 oskar 798: *adapt_field_ctrl = TS_AFC_BOTH;
1.1 oskar 799: }
800: }
1.7 oskar 801: return (payload);
802: }
803:
804: /* Generate packet header.
805: * Keep track of continuity counter (which is selected in procdata_check_psi).
806: * Precondition: d!=NULL (data destination).
807: * Input: pid, scramble, adaption_field_ctrl.
808: * Return: d (increased by header size).
809: */
810: static byte *procdata_syn_head (byte *d,
811: int pid,
812: byte scramble,
813: byte adapt_field_ctrl)
814: {
1.1 oskar 815: *d++ = TS_SYNC_BYTE;
1.7 oskar 816: warn (LSEC,"Splice unitstart",ETSC,7,1,unit_start);
817: warn (LSEC,"Splice PID",ETSC,7,2,pid);
1.1 oskar 818: *d++ = (0 << 7) /* transport_error_indicator */
819: | unit_start
820: | (0 << 5) /* transport_priority */
821: | (pid >> 8);
822: *d++ = pid;
823: *d++ = (scramble << 6)
824: | adapt_field_ctrl
825: | *conticnt;
1.7 oskar 826: warn (LSEC,"Splice continuity cnt",ETSC,7,3,*conticnt);
1.1 oskar 827: if (adapt_field_ctrl & TS_AFC_PAYLD) {
828: *conticnt = (*conticnt+1) & 0x0F;
829: }
1.7 oskar 830: return (d);
831: }
832:
833: /* Generate adpation field.
834: * This MUST match the calculations in procdata_adaptfield_flags.
835: * Precondition: s!=NULL.
836: * Input: s (stream), c (current ctrl fifo out), d (data destination),
837: * padding (number of padding bytes needed), payload (number of payload bytes
838: * to insert), adapt_field_ctrl, adapt_flags1, adapt_flags2, adapt_ext_len.
839: * Return: d (increased by adaption field size).
840: */
841: static byte *procdata_syn_adaptfield (stream_descr *s,
842: ctrl_buffer *c,
843: byte *d,
844: int padding,
845: int payload,
846: byte adapt_field_ctrl,
847: byte adapt_flags1,
848: byte adapt_flags2,
849: int adapt_ext_len)
850: {
1.1 oskar 851: if (adapt_field_ctrl & TS_AFC_ADAPT) {
1.7 oskar 852: if ((*d++ = (TS_PACKET_SIZE - TS_PACKET_FLAGS1) - payload) != 0) {
1.1 oskar 853: *d++ = adapt_flags1;
854: if (adapt_flags1 & TS_ADAPT_PCRFLAG) {
855: clockref pcr;
1.17 oskar 856: msec2cref (&s->u.d.conv, c->msecpush + s->u.d.delta, &pcr);
1.1 oskar 857: *d++ = (pcr.base >> 25) | (pcr.ba33 << 7);
858: *d++ = pcr.base >> 17;
859: *d++ = pcr.base >> 9;
860: *d++ = pcr.base >> 1;
861: *d++ = (pcr.base << 7) | (pcr.ext >> 8) | 0x7E;
862: *d++ = pcr.ext;
863: s->u.d.next_clockref =
1.2 oskar 864: (c->msecpush + s->u.d.delta) + MAX_MSEC_PCRDIST;
1.1 oskar 865: c->pcr.valid = FALSE;
866: }
867: if (adapt_flags1 & TS_ADAPT_OPCRFLAG) {
1.4 oskar 868: clockref *opcr;
869: if (c->opcr.valid) {
870: opcr = &c->opcr;
871: } else {
872: opcr = &c->pcr;
873: }
874: *d++ = (opcr->base >> 25) | (opcr->ba33 << 7);
875: *d++ = opcr->base >> 17;
876: *d++ = opcr->base >> 9;
877: *d++ = opcr->base >> 1;
878: *d++ = (opcr->base << 7) | (opcr->ext >> 8) | 0x7E;
879: *d++ = opcr->ext;
880: opcr->valid = FALSE;
1.1 oskar 881: }
882: if (adapt_flags1 & TS_ADAPT_SPLICING) {
883: }
884: if (adapt_flags1 & TS_ADAPT_TPRIVATE) {
885: }
886: if (adapt_flags1 & TS_ADAPT_EXTENSIO) {
887: *d++ = adapt_ext_len;
888: *d++ = adapt_flags2 | 0x1F;
1.5 oskar 889: if (adapt_flags2 & TS_ADAPT2_LTWFLAG) {
1.1 oskar 890: }
1.5 oskar 891: if (adapt_flags2 & TS_ADAPT2_PIECEWRF) {
1.1 oskar 892: }
1.5 oskar 893: if (adapt_flags2 & TS_ADAPT2_SEAMLESS) {
1.1 oskar 894: }
895: }
896: }
1.7 oskar 897: if (padding > 0) {
898: warn (LSEC,"Splice padding",ETSC,8,1,padding);
899: memset (d,-1,padding);
900: d += padding;
1.1 oskar 901: }
902: }
1.7 oskar 903: return (d);
904: }
905:
906: /* Generate payload portion.
907: * Insert the appropriate payload (either PSI or data), check whether payload
908: * from this PES packet or section is left.
909: * Precondition: s!=NULL.
910: * Input: s (stream), c (current ctrl fifo out), d (data destination),
911: * payload (number of payload bytes to insert).
912: * Return: processed stream s, if there is more data from the current PES
913: * packet to be processed, NULL otherwise.
914: */
915: static stream_descr *procdata_syn_payload (stream_descr *s,
916: ctrl_buffer *c,
917: byte *d,
918: int payload)
919: {
920: if (payload > 0) {
1.1 oskar 921: if (psi_size > 0) {
1.7 oskar 922: memcpy (d,&psi_data[psi_done],payload);
923: if (payload < psi_size) {
924: warn (LSEC,"Splice PSI Data",ETSC,9,s->stream_id,payload);
925: psi_done += payload;
926: psi_size -= payload;
1.1 oskar 927: unit_start = 0;
928: } else {
1.7 oskar 929: warn (LINF,"Splice PSI Done",ETSC,9,s->stream_id,payload);
1.1 oskar 930: psi_done = psi_size = 0;
931: unit_start = TS_UNIT_START;
932: }
933: } else {
1.7 oskar 934: memcpy (d,&s->data.ptr[c->index],payload);
935: if (payload < c->length) {
936: warn (LSEC,"Splice Data",ETSC,9,s->stream_id,payload);
937: c->length -= payload;
938: s->data.out = (c->index += payload);
1.1 oskar 939: unit_start = 0;
940: } else {
1.7 oskar 941: warn (LINF,"Splice Done",ETSC,9,s->stream_id,payload);
1.1 oskar 942: list_incr (s->ctrl.out,s->ctrl,1);
943: if (list_empty (s->ctrl)) {
944: s->data.out = s->data.in;
945: } else {
946: s->data.out = s->ctrl.ptr[s->ctrl.out].index;
947: }
948: unit_start = TS_UNIT_START;
1.7 oskar 949: return (NULL);
1.1 oskar 950: }
951: }
952: }
953: return (s);
1.7 oskar 954: }
955:
956: /* Process unparsed si data and generate output.
957: * Take one TS paket, copy it to output stream data buffer.
958: * Precondition: s!=NULL, !list_empty(s->ctrl), s->streamdata==sd_unparsedsi,
959: * s->ctrl.ptr[s->ctrl.out].length==TS_PACKET_SIZE, d!=NULL.
960: */
961: static void proc_unparsedsi (stream_descr *s,
962: byte *d)
963: {
1.17 oskar 964: warn (LINF,"Splice Unparsed SI",ETSC,10,s->sourceid,s->streamdata);
1.7 oskar 965: memcpy (d,&s->data.ptr[s->ctrl.ptr[s->ctrl.out].index],TS_PACKET_SIZE);
966: /* check if == s->ctrl.ptr[s->ctrl.out].length); ? */
967: list_incr (s->ctrl.out,s->ctrl,1);
968: if (list_empty (s->ctrl)) {
1.12 oskar 969: s->data.out = s->data.in;
1.10 oskar 970: input_closefileifunused (s->fdescr);
1.7 oskar 971: } else {
972: s->data.out = s->ctrl.ptr[s->ctrl.out].index;
973: }
974: }
975:
976: stream_descr *process_something (stream_descr *s)
977: {
978: byte *d;
979: int pid;
980: byte scramble;
981: int size;
982: ctrl_buffer *c;
983: int payload;
984: int space;
985: int adapt_ext_len;
986: byte adapt_field_ctrl;
987: byte adapt_flags1, adapt_flags2;
988: warn (LDEB,"Splice TS",ETSC,0,0,s->ctrl.out);
989: switch (s->streamdata) {
990: case sd_data:
991: c = &s->ctrl.ptr[s->ctrl.out];
992: procdata_check_psi (&pid, &scramble, &size, s, c);
1.17 oskar 993: d = output_pushdata (TS_PACKET_SIZE, TRUE, c->msecpush + s->u.d.delta);
1.7 oskar 994: if (d == NULL) {
995: return (s);
996: }
997: space = procdata_adaptfield_flags (&adapt_flags1, &adapt_flags2,
998: &adapt_ext_len, s, c);
1.8 oskar 999: payload = procdata_adaptfield_frame (&space, &adapt_field_ctrl,
1000: adapt_flags1, size);
1.7 oskar 1001: d = procdata_syn_head (d, pid, scramble, adapt_field_ctrl);
1.8 oskar 1002: d = procdata_syn_adaptfield (s, c, d, space-payload, payload,
1003: adapt_field_ctrl, adapt_flags1, adapt_flags2, adapt_ext_len);
1.7 oskar 1004: return (procdata_syn_payload (s, c, d, payload));
1005: break;
1006: case sd_map:
1007: validate_mapref (s);
1008: return (NULL);
1009: break;
1010: case sd_unparsedsi:
1011: c = &s->ctrl.ptr[s->ctrl.out];
1.17 oskar 1012: d = output_pushdata (TS_PACKET_SIZE, FALSE, 0);
1.7 oskar 1013: if (d == NULL) {
1014: return (s);
1015: }
1016: proc_unparsedsi (s,d);
1017: return (NULL);
1018: break;
1019: default:
1020: return (NULL);
1021: break;
1022: }
1.1 oskar 1023: }
1024:
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