2 * SPDX-License-Identifier: BSD-4-Clause
5 * Petr Holub, Hidetoshi Shimokawa. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
18 * This product includes software developed by Hidetoshi Shimokawa.
20 * 4. Neither the name of the author nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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38 #include <sys/param.h>
39 #include <sys/ioctl.h>
41 #include <sys/types.h>
43 #include <arpa/inet.h>
53 #if defined(__FreeBSD__)
54 #include <dev/firewire/firewire.h>
55 #include <dev/firewire/iec68113.h>
56 #elif defined(__NetBSD__)
57 #include <dev/ieee1394/firewire.h>
58 #include <dev/ieee1394/iec68113.h>
60 #warning "You need to add support for your OS"
64 #include "fwmethods.h"
68 /*****************************************************************************
70 MPEG-2 Transport Stream (MPEG TS) packet format according to IEC 61883:
73 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ --------
74 | len |tag| channel | tcode | sy |
75 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 1394
77 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ --------
78 |0|0| sid | dbs |fn | qpc |S|RSV| dbc |
79 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ CIP
80 |1|0| fmt | fdf | fdf/syt |
81 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ --------
82 | reserved | cycle_count | cycle_offset |
83 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
86 . MPEG TS payload 188 bytes .
89 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ --------
91 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
93 N.b. that CRCs are removed by firewire layer!
95 The following fields are fixed for IEEE-1394:
98 The length is payload length, i.e. includes CIP header and data size.
100 The following fields are constant for MPEG TS:
101 sph = 1 (denoted as S in CIP header above)
105 In the supported streams we also require
108 and thus the payload is divided in 8 blocks as follows:
110 +-----+-----+-----+-----+-----+-----+-----+-----+
111 | db0 | db1 | db2 | db3 | db4 | db5 | db6 | db7 |
112 +-----+-----+-----+-----+-----+-----+-----+-----+
114 We have several cases of payload distribution based on stream
116 1) R < 1.5 Mbps: any of db0..db7 may be payload,
117 2) 1.5 < R < 3 Mbps: db0/db1 or db2/db3 or db4/db5 or db6/db7 is payload,
118 3) 3 < R < 6 Mbps: db0/db1/db2/db3 or db4/db5/db6/db7 is payload,
119 4) R > 6 Mbps: all db0..db7 contain the payload.
120 Currently, only case (4) is supported in fwmpegts.c
122 Each packet may contain N MPEG TS data blocks with timestamp header,
123 which are (4+188)B long. Experimentally, the N ranges from 0 through 3.
125 *****************************************************************************/
128 typedef uint8_t mpeg_ts_pld[188];
131 #if BYTE_ORDER == BIG_ENDIAN
135 #else /* BYTE_ORDER != BIG_ENDIAN */
136 uint32_t c_offset:12,
139 #endif /* BYTE_ORDER == BIG_ENDIAN */
146 #define NPACKET_R 4096
147 #define RBUFSIZE (PSIZE * NPACKET_R)
150 mpegtsrecv(int d, const char *filename, char ich, int count)
153 struct fw_isochreq isoreq;
154 struct fw_isobufreq bufreq;
156 struct mpeg_pldt *pld;
158 int fd, k, len, m, pkt_size, startwr, tlen;
163 if (strcmp(filename, "-") == 0)
166 fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0660);
168 err(EX_NOINPUT, "%s", filename);
170 buf = malloc(RBUFSIZE);
172 bufreq.rx.nchunk = NCHUNK;
173 bufreq.rx.npacket = NPACKET_R;
174 bufreq.rx.psize = PSIZE;
175 bufreq.tx.nchunk = 0;
176 bufreq.tx.npacket = 0;
178 if (ioctl(d, FW_SSTBUF, &bufreq) < 0)
181 isoreq.ch = ich & 0x3f;
182 isoreq.tag = (ich >> 6) & 3;
184 if (ioctl(d, FW_SRSTREAM, &isoreq) < 0)
188 while (count <= 0 || k <= count) {
189 len = tlen = read(d, buf, RBUFSIZE);
191 fprintf(stderr, "Read %d bytes.\n", len);
194 if (errno == EAGAIN) {
195 fprintf(stderr, "(EAGAIN) - push 'Play'?\n");
198 err(1, "read failed");
200 ptr = (uint32_t *) buf;
203 pkt = (struct fw_pkt *) ptr;
205 fprintf(stderr, "\nReading new packet.\n");
206 fprintf(stderr, "%08x %08x %08x %08x\n",
207 htonl(ptr[0]), htonl(ptr[1]),
208 htonl(ptr[2]), htonl(ptr[3]));
210 /* there is no CRC in the 1394 header */
211 ciph = (struct ciphdr *)(ptr + 1); /* skip iso header */
212 if (ciph->fmt != CIP_FMT_MPEG)
213 errx(1, "unknown format 0x%x", ciph->fmt);
216 "unsupported MPEG TS stream, fn=%d (only fn=3 is supported)",
219 ptr = (uint32_t *) (ciph + 1); /* skip cip header */
221 if (pkt->mode.stream.len <= sizeof(struct ciphdr)) {
223 /* tlen needs to be decremented before end of the loop */
229 "Packet net payload length (IEEE1394 header): %d\n",
230 pkt->mode.stream.len - sizeof(struct ciphdr));
231 fprintf(stderr, "Data block size (CIP header): %d [q], %d [B]\n",
232 ciph->len, ciph->len * 4);
234 "Data fraction number (CIP header): %d => DBC increments with %d\n",
235 ciph->fn, (1<<ciph->fn) );
236 fprintf(stderr, "QCP (CIP header): %d\n", ciph->qpc );
237 fprintf(stderr, "DBC counter (CIP header): %d\n", ciph->dbc );
238 fprintf(stderr, "MPEG payload type size: %d\n",
239 sizeof(struct mpeg_pldt));
243 /* This is a condition that needs to be satisfied to start
245 if (ciph->dbc % (1<<ciph->fn) == 0)
247 /* Read out all the MPEG TS data blocks from current packet */
248 for (pld = (struct mpeg_pldt *)ptr;
249 (intptr_t)pld < (intptr_t)((char *)ptr +
250 pkt->mode.stream.len - sizeof(struct ciphdr));
253 write(fd, pld->payload,
254 sizeof(pld->payload));
258 /* CRCs are removed from both header and trailer
259 so that only 4 bytes of 1394 header remains */
260 pkt_size = pkt->mode.stream.len + 4;
261 ptr = (uint32_t *)((intptr_t)pkt + pkt_size);
265 fprintf(stderr, "\nReading a data from firewire.\n");
269 if (fd != STDOUT_FILENO)
271 fprintf(stderr, "\n");