Annotation of multiplexer/global.h, revision 1.7
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: #include <asm/types.h>
8: #include <sys/types.h>
9: #include <sys/poll.h>
10: #include <sys/time.h>
11: #include <sys/unistd.h>
12: #include <sys/stat.h>
13: #include <unistd.h>
14: #include <fcntl.h>
15: #include <stdlib.h>
16: #include <string.h>
17: #include <errno.h>
18:
19: /* for a timing and poll profile: */
20: #if 0
21: #define DEBUG_TIMEPOLL
22: #endif
23:
24: #define MAX_MSEC_OUTDELAY 500
25: #define MAX_MSEC_PUSHJTTR (2 * 250)
1.3 oskar 26: #define MAX_MSEC_PCRDIST (100 * 80/100)
1.1 oskar 27:
28: #define MAX_POLLFD (MAX_INFILE+3)
29:
30: #define MAX_DATA_COMB 512
31: #define HIGHWATER_COM 8
32:
1.4 oskar 33: #define MAX_CTRL_OUTB (1 << 11)
34: #define MAX_DATA_OUTB (MAX_CTRL_OUTB << 7)
1.1 oskar 35: #define HIGHWATER_OUT 512
36: #define MAX_WRITE_OUT (128 * 188)
37:
1.4 oskar 38: #define MAX_CTRL_INB (1 << 8)
39: #define MAX_DATA_INBV (MAX_CTRL_INB << 10)
40: #define MAX_DATA_INBA (MAX_CTRL_INB << 9)
41: #define MAX_DATA_INB (MAX_CTRL_INB << 9)
42: #define HIGHWATER_IN (16 * 1024)
43:
44: #define MAX_DATA_RAWB (1 << 18)
45: #define HIGHWATER_RAW (16 * 1024)
46: #define MAX_READ_IN (8 * 1024)
1.1 oskar 47:
48: #define MAX_INSTREAM 64 /* ? */
49: #define MAX_INFILE 8 /* ? */
50:
51: #define MAX_STRPERPS (1<<8)
52: #define MAX_STRPERTS (1<<13)
53:
54: #define MAX_STRPERPRG 42 /* ? */
55: #define MAX_PRGFORSTR 12 /* ? */
56: #define MAX_OUTPROG 16 /* ? */
57:
58: #define MAX_PSI_SIZE 1025
59: #define MAX_PMTSTREAMS (MAX_PSI_SIZE / 4)
60:
61: #define ENDSTR_KILL 0
62: #define ENDSTR_CLOSE 1
63: #define ENDSTR_WAIT 2
64:
65: #define PES_LOWEST_SID (0xBC)
66: #define NUMBER_ELEMD 19
67: #define TS_PACKET_SIZE 188
68:
69: #define CRC_SIZE 4
70:
71: #define boolean __u8
72: #define FALSE 0
73: #define TRUE 1
74:
75: #define byte __u8
1.4 oskar 76: #define t_msec __s32
1.1 oskar 77:
1.7 ! oskar 78: /* ISO 13818 clock reference 90kHz (33 bit) with 27MHz extension (9 bit).
! 79: * ba33 holds the high bit of base.
! 80: */
1.1 oskar 81: typedef struct {
1.4 oskar 82: __u32 base;
83: __u16 ext;
1.3 oskar 84: byte ba33;
1.1 oskar 85: boolean valid;
86: } clockref;
87:
1.7 ! oskar 88: /* For conversion purposes, this pair of values holds a partial clock
! 89: * reference and an internal value in milliseconds. This is to eliminate
! 90: * wrapping faults without producing conversion inaccuracies.
! 91: */
1.1 oskar 92: typedef struct {
1.4 oskar 93: __u32 base;
94: t_msec msec;
1.3 oskar 95: } conversion_base;
1.1 oskar 96:
1.7 ! oskar 97: /* On reference to a controlled data buffer, this one holds the control
! 98: * information, mainly: index into the data buffer, length of the referenced
! 99: * data block. In a controlled data buffer, a data block is never split to
! 100: * wrap at the end of the buffer. The other fields are usage dependend.
! 101: */
1.1 oskar 102: typedef struct {
103: int index;
104: int length;
105: int sequence;
1.4 oskar 106: t_msec msecread;
107: t_msec msecpush;
1.3 oskar 108: clockref pcr;
1.1 oskar 109: clockref opcr;
1.4 oskar 110: byte scramble;
1.1 oskar 111: } ctrl_buffer;
112:
1.7 ! oskar 113: /* Control buffer */
1.1 oskar 114: typedef struct {
115: ctrl_buffer *ptr;
116: int in;
117: int out;
118: int mask;
119: } refr_ctrl;
120:
1.7 ! oskar 121: /* Data buffer */
1.1 oskar 122: typedef struct {
123: byte *ptr;
124: int in;
125: int out;
126: int mask;
127: } refr_data;
128:
1.7 ! oskar 129: /* Test on buffer emptiness */
1.1 oskar 130: #define list_empty(refr) ((refr).out == (refr).in)
131:
1.7 ! oskar 132: /* Create a new buffer, return TRUE on success, FALSE otherwise */
1.1 oskar 133: #define list_create(refr,size) \
134: ((((size) & ((size)-1)) || (size < 2)) ? \
135: warn (LERR,"List Create",EGLO,1,1,size), FALSE : \
136: ((refr).ptr = malloc((size) * sizeof(*(refr).ptr))) == NULL ? \
137: warn (LERR,"List Create",EGLO,1,2,size), FALSE : \
138: ((refr).mask = (size)-1, (refr).in = (refr).out = 0, TRUE))
139:
1.7 ! oskar 140: /* Release a buffer no longer used */
1.1 oskar 141: #define list_release(refr) \
142: ((refr).mask = 0, free((refr).ptr), (refr).ptr = NULL)
143:
1.7 ! oskar 144: /* Compute number of free elements in buffer */
1.1 oskar 145: #define list_free(refr) \
146: (((refr).out - (refr).in - 1) & (refr).mask)
147:
1.7 ! oskar 148: /* Compute number of free elements up to the wrapping point, if the
! 149: latter is included in the free part of the buffer */
1.1 oskar 150: #define list_freeinend(refr) \
151: ((refr).mask + 1 - (refr).in)
152:
1.7 ! oskar 153: /* Compute number of used elements in buffer (i.e. its current size) */
1.1 oskar 154: #define list_size(refr) \
155: (((refr).in - (refr).out) & (refr).mask)
156:
1.7 ! oskar 157: /* Test on buffer fullness */
1.1 oskar 158: #define list_full(refr) \
159: (list_free(refr) == 0)
160:
1.7 ! oskar 161: /* Test on buffer half-fullness (as trigger criterium) */
1.4 oskar 162: #define list_halffull(refr) \
163: (list_size(refr) > ((refr).mask >> 1))
164:
1.7 ! oskar 165: /* Increment an index variable that points in to a buffer by a given value */
1.1 oskar 166: #define list_incr(var,refr,incr) \
167: ((var) = (((var) + (incr)) & (refr).mask))
168:
1.7 ! oskar 169: /* Check a data byte against a mask */
1.1 oskar 170: #define marker_check(data,val,mask) \
171: (((data & mask) != val) ? \
172: warn(LWAR,"Marker bit",EGLO,2,data,mask), TRUE : FALSE)
173:
1.7 ! oskar 174: /* Check whether a given bit is set in a data byte */
1.1 oskar 175: #define marker_bit(data,bit) \
176: marker_check(data,1<<bit,1<<bit)
177:
178: #define mmin(a,b) ((a)<(b)?(a):(b))
179: #define mmax(a,b) ((a)<(b)?(b):(a))
180:
1.7 ! oskar 181: /* Allocate memory for a struct with known union usage */
1.1 oskar 182: #define unionalloc(typ,fld) \
183: (malloc (sizeof(typ)-sizeof(((typ*)0)->u)+sizeof(((typ*)0)->u.fld)))
184:
1.7 ! oskar 185: /* Reference descriptors as these are parsed from PSI */
1.1 oskar 186: typedef struct {
187: int programnumber;
1.4 oskar 188: short sourceid;
1.1 oskar 189: byte version;
190: byte *elemdnew[NUMBER_ELEMD];
191: } mapreference;
192:
1.7 ! oskar 193: /* Source TS PMT list */
1.1 oskar 194: typedef struct pmtdescr {
195: struct pmtdescr *next;
196: short pat_section;
197: byte pmt_version;
198: int programnumber;
1.4 oskar 199: short pcr_pid;
200: short pmt_pid;
201: short streams;
1.1 oskar 202: short stream[MAX_PMTSTREAMS];
203: byte streamtype[MAX_PMTSTREAMS];
1.4 oskar 204: short descrlen;
1.1 oskar 205: byte elemdescr[MAX_PSI_SIZE];
206: } pmt_descr;
207:
1.7 ! oskar 208: /* Automatic stream usage requests as stated via command */
1.1 oskar 209: typedef struct {
210: int sprg, tprg, ssid, tsid;
211: } tsauto_descr;
212:
1.7 ! oskar 213: /* Supported input file types */
1.1 oskar 214: typedef enum {
215: ct_none,
216: ct_packetized,
217: ct_program,
218: ct_transport,
219: ct_unknown
220: } content_type;
221:
1.7 ! oskar 222: /* Source file */
1.1 oskar 223: typedef struct {
224: refr_data data;
1.5 oskar 225: int handle;
1.1 oskar 226: char *name;
1.5 oskar 227: int filerefnum;
1.4 oskar 228: int st_mode;
1.1 oskar 229: struct pollfd *ufds;
230: int skipped; /* undesired bytes skipped, total */
231: int payload; /* split payload used total */
232: int total; /* split total (skipped, used, wasted) */
233: int sequence; /* source counter for PES sequence */
1.4 oskar 234: short opendatastreams;
235: short openmapstreams;
1.5 oskar 236: char *append_name;
237: int append_filerefnum;
238: int append_repeatitions;
1.2 oskar 239: int repeatitions;
1.1 oskar 240: int auto_programnb;
1.5 oskar 241: boolean automatic; /* extract'o'use */
242: boolean stopfile;
1.1 oskar 243: content_type content;
244: union {
245: struct {
246: struct streamdescr *stream;
247: } pes;
248: struct {
249: struct {
250: clockref scr;
1.4 oskar 251: __u32 muxrate;
1.1 oskar 252: } ph;
253: struct {
1.4 oskar 254: __u32 ratebound;
255: byte audiobound;
256: byte videobound;
1.1 oskar 257: boolean csps_flag;
258: boolean fixed_flag;
259: boolean system_video_lock_flag;
260: boolean system_audio_lock_flag;
261: boolean packet_rate_restriction_flag;
262: short buffer_bound[MAX_STRPERPS-PES_LOWEST_SID];
263: } sh;
264: /*
265: struct {
266: } dir;
267: */
268: struct streamdescr *stream[MAX_STRPERPS];
269: } ps;
270: struct {
1.4 oskar 271: __u16 transportstreamid;
1.1 oskar 272: byte pat_version;
273: byte newpat_version;
274: pmt_descr *pat;
275: pmt_descr *newpat;
276: int tsautos;
277: tsauto_descr *tsauto;
278: struct streamdescr *stream[MAX_STRPERTS];
279: } ts;
280: } u;
281: } file_descr;
282:
1.7 ! oskar 283: /* Target program */
1.1 oskar 284: typedef struct {
285: int program_number;
1.4 oskar 286: short pcr_pid;
287: short pmt_pid;
1.1 oskar 288: byte pmt_conticnt;
289: byte pmt_version;
290: boolean changed;
1.4 oskar 291: short pat_section;
292: short streams;
1.1 oskar 293: struct streamdescr *stream[MAX_STRPERPRG];
294: } prog_descr;
295:
1.7 ! oskar 296: /* Single data or map stream */
1.1 oskar 297: typedef struct streamdescr {
298: refr_ctrl ctrl;
299: refr_data data;
1.4 oskar 300: file_descr *fdescr;
301: short sourceid; /* index into fdescr->u.xx.stream[] */
1.1 oskar 302: byte stream_id; /* elementary stream id, table 2-35, etc */
303: byte stream_type;
304: byte version;
1.4 oskar 305: byte conticnt;
306: byte endaction;
1.1 oskar 307: byte *elemdvld[NUMBER_ELEMD]; /* as valid for out */
308: byte elemdescr[MAX_PSI_SIZE];
309: /*what if a stream is leftupper corner in one prog, but elsewhere in another?*/
310: boolean isamap;
311: union {
312: struct {
313: struct streamdescr *mapstream;
1.4 oskar 314: t_msec next_clockref;
315: t_msec delta;
316: conversion_base conv;
317: t_msec lasttime;
318: short pid; /* splicets: 0010..1FFE, spliceps: ...FF */
1.1 oskar 319: boolean discontinuity;
320: boolean trigger;
321: boolean mention;
322: boolean has_clockref; /* in output */
1.6 oskar 323: boolean has_opcr; /* in input */
1.4 oskar 324: short progs;
1.1 oskar 325: prog_descr *pdescr[MAX_PRGFORSTR];
326: } d;
327: struct {
1.4 oskar 328: t_msec msectime;
1.3 oskar 329: conversion_base conv;
1.1 oskar 330: int psi_length;
331: byte psi_data[MAX_PSI_SIZE+TS_PACKET_SIZE];
332: } m;
333: } u;
334: } stream_descr;
335:
336:
337: extern boolean timed_io;
338: extern boolean accept_weird_scr;
1.4 oskar 339: extern t_msec global_delta;
340: extern t_msec psi_frequency_msec;
1.1 oskar 341: extern boolean psi_frequency_changed;
342:
1.4 oskar 343: t_msec msec_now (void);
1.3 oskar 344:
345: void cref2msec (conversion_base *b,
346: clockref c,
1.4 oskar 347: t_msec *m);
1.3 oskar 348:
349: void msec2cref (conversion_base *b,
1.4 oskar 350: t_msec m,
1.3 oskar 351: clockref *c);
1.1 oskar 352:
353: void global_init (void);
354:
355:
356: #ifdef DEBUG_TIMEPOLL
357:
358: #define max_timepoll (1024*1024)
359:
360: typedef struct {
361: struct timeval tv;
1.4 oskar 362: t_msec msec_now;
1.1 oskar 363: int usec;
364: int tmo;
365: int sr, si, so;
366: unsigned char cnt_msecnow;
367: unsigned char nfdso, nfdsi;
368: unsigned char nfdsrevent;
369: unsigned char flags;
370: } timepoll;
371: #define LTP_FLAG_DELTASHIFT 0x80
372: #define LTP_FLAG_OUTPUT 0x40
373: #define LTP_FLAG_INPUT 0x20
374: #define LTP_FLAG_SPLIT 0x10
375: #define LTP_FLAG_PROCESS 0x08
376:
377: extern timepoll logtp [max_timepoll];
378: extern long logtpc;
379: extern timepoll *ltp;
380:
381: #endif
382:
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