1 /*
2 * libdvbdemux - a DVB demux library
3 *
4 * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library 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 GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include <stdlib.h>
22 #include <string.h>
23 #include <stdio.h>
24 #include <sys/param.h>
25 #include <sys/ioctl.h>
26 #include <fcntl.h>
27 #include <unistd.h>
28 #include <ctype.h>
29 #include <errno.h>
30 #include <linux/dvb/dmx.h>
31 #include "dvbdemux.h"
32
33
dvbdemux_open_demux(int adapter,int demuxdevice,int nonblocking)34 int dvbdemux_open_demux(int adapter, int demuxdevice, int nonblocking)
35 {
36 char filename[PATH_MAX+1];
37 int flags = O_RDWR;
38 int fd;
39
40 if (nonblocking)
41 flags |= O_NONBLOCK;
42
43 sprintf(filename, "/dev/dvb/adapter%i/demux%i", adapter, demuxdevice);
44 if ((fd = open(filename, flags)) < 0) {
45 // if that failed, try a flat /dev structure
46 sprintf(filename, "/dev/dvb%i.demux%i", adapter, demuxdevice);
47 fd = open(filename, flags);
48 }
49
50 return fd;
51 }
52
dvbdemux_open_dvr(int adapter,int dvrdevice,int readonly,int nonblocking)53 int dvbdemux_open_dvr(int adapter, int dvrdevice, int readonly, int nonblocking)
54 {
55 char filename[PATH_MAX+1];
56 int flags = O_RDWR;
57 int fd;
58
59 if (readonly)
60 flags = O_RDONLY;
61 if (nonblocking)
62 flags |= O_NONBLOCK;
63
64 sprintf(filename, "/dev/dvb/adapter%i/dvr%i", adapter, dvrdevice);
65 if ((fd = open(filename, flags)) < 0) {
66 // if that failed, try a flat /dev structure
67 sprintf(filename, "/dev/dvb%i.dvr%i", adapter, dvrdevice);
68 fd = open(filename, flags);
69 }
70
71 return fd;
72 }
73
dvbdemux_set_section_filter(int fd,int pid,uint8_t filter[18],uint8_t mask[18],int start,int checkcrc)74 int dvbdemux_set_section_filter(int fd, int pid,
75 uint8_t filter[18], uint8_t mask[18],
76 int start, int checkcrc)
77 {
78 struct dmx_sct_filter_params sctfilter;
79
80 memset(&sctfilter, 0, sizeof(sctfilter));
81 sctfilter.pid = pid;
82 memcpy(sctfilter.filter.filter, filter, 1);
83 memcpy(sctfilter.filter.filter+1, filter+3, 15);
84 memcpy(sctfilter.filter.mask, mask, 1);
85 memcpy(sctfilter.filter.mask+1, mask+3, 15);
86 memset(sctfilter.filter.mode, 0, 16);
87 if (start)
88 sctfilter.flags |= DMX_IMMEDIATE_START;
89 if (checkcrc)
90 sctfilter.flags |= DMX_CHECK_CRC;
91
92 return ioctl(fd, DMX_SET_FILTER, &sctfilter);
93 }
94
dvbdemux_set_pes_filter(int fd,int pid,int input,int output,int pestype,int start)95 int dvbdemux_set_pes_filter(int fd, int pid,
96 int input, int output,
97 int pestype,
98 int start)
99 {
100 struct dmx_pes_filter_params filter;
101
102 memset(&filter, 0, sizeof(filter));
103 filter.pid = pid;
104
105 switch(input) {
106 case DVBDEMUX_INPUT_FRONTEND:
107 filter.input = DMX_IN_FRONTEND;
108 break;
109
110 case DVBDEMUX_INPUT_DVR:
111 filter.input = DMX_IN_DVR;
112 break;
113
114 default:
115 return -EINVAL;
116 }
117
118 switch(output) {
119 case DVBDEMUX_OUTPUT_DECODER:
120 filter.output = DMX_OUT_DECODER;
121 break;
122
123 case DVBDEMUX_OUTPUT_DEMUX:
124 filter.output = DMX_OUT_TAP;
125 break;
126
127 case DVBDEMUX_OUTPUT_DVR:
128 filter.output = DMX_OUT_TS_TAP;
129 break;
130
131 #ifdef DMX_OUT_TSDEMUX_TAP
132 case DVBDEMUX_OUTPUT_TS_DEMUX:
133 filter.output = DMX_OUT_TSDEMUX_TAP;
134 break;
135 #endif
136
137 default:
138 return -EINVAL;
139 }
140
141 switch(pestype) {
142 case DVBDEMUX_PESTYPE_AUDIO:
143 filter.pes_type = DMX_PES_AUDIO;
144 break;
145
146 case DVBDEMUX_PESTYPE_VIDEO:
147 filter.pes_type = DMX_PES_VIDEO;
148 break;
149
150 case DVBDEMUX_PESTYPE_TELETEXT:
151 filter.pes_type = DMX_PES_TELETEXT;
152 break;
153
154 case DVBDEMUX_PESTYPE_SUBTITLE:
155 filter.pes_type = DMX_PES_SUBTITLE;
156 break;
157
158 case DVBDEMUX_PESTYPE_PCR:
159 filter.pes_type = DMX_PES_PCR;
160 break;
161
162 default:
163 return -EINVAL;
164 }
165
166 if (start)
167 filter.flags |= DMX_IMMEDIATE_START;
168
169 return ioctl(fd, DMX_SET_PES_FILTER, &filter);
170 }
171
dvbdemux_set_pid_filter(int fd,int pid,int input,int output,int start)172 int dvbdemux_set_pid_filter(int fd, int pid,
173 int input, int output,
174 int start)
175 {
176 struct dmx_pes_filter_params filter;
177
178 memset(&filter, 0, sizeof(filter));
179 if (pid == -1)
180 filter.pid = 0x2000;
181 else
182 filter.pid = pid;
183
184 switch(input) {
185 case DVBDEMUX_INPUT_FRONTEND:
186 filter.input = DMX_IN_FRONTEND;
187 break;
188
189 case DVBDEMUX_INPUT_DVR:
190 filter.input = DMX_IN_DVR;
191 break;
192
193 default:
194 return -EINVAL;
195 }
196
197 switch(output) {
198 case DVBDEMUX_OUTPUT_DECODER:
199 filter.output = DMX_OUT_DECODER;
200 break;
201
202 case DVBDEMUX_OUTPUT_DEMUX:
203 filter.output = DMX_OUT_TAP;
204 break;
205
206 case DVBDEMUX_OUTPUT_DVR:
207 filter.output = DMX_OUT_TS_TAP;
208 break;
209
210 #ifdef DMX_OUT_TSDEMUX_TAP
211 case DVBDEMUX_OUTPUT_TS_DEMUX:
212 filter.output = DMX_OUT_TSDEMUX_TAP;
213 break;
214 #endif
215
216 default:
217 return -EINVAL;
218 }
219
220 filter.pes_type = DMX_PES_OTHER;
221
222 if (start)
223 filter.flags |= DMX_IMMEDIATE_START;
224
225 return ioctl(fd, DMX_SET_PES_FILTER, &filter);
226 }
227
dvbdemux_start(int fd)228 int dvbdemux_start(int fd)
229 {
230 return ioctl(fd, DMX_START);
231 }
232
dvbdemux_stop(int fd)233 int dvbdemux_stop(int fd)
234 {
235 return ioctl(fd, DMX_STOP);
236 }
237
dvbdemux_get_stc(int fd,uint64_t * stc)238 int dvbdemux_get_stc(int fd, uint64_t *stc)
239 {
240 struct dmx_stc _stc;
241 int result;
242
243 memset(stc, 0, sizeof(_stc));
244 if ((result = ioctl(fd, DMX_GET_STC, &_stc)) != 0) {
245 return result;
246 }
247
248 *stc = _stc.stc / _stc.base;
249 return 0;
250 }
251
dvbdemux_set_buffer(int fd,int bufsize)252 int dvbdemux_set_buffer(int fd, int bufsize)
253 {
254 return ioctl(fd, DMX_SET_BUFFER_SIZE, bufsize);
255 }
256