3 * @brief Digital broadcasting input module for VLC media player
5 /*****************************************************************************
6 * Copyright © 2011 Rémi Denis-Courmont
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public License
10 * as published by the Free Software Foundation; either version 2.1
11 * of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 ****************************************************************************/
27 #include <vlc_common.h>
28 #include <vlc_access.h>
29 #include <vlc_plugin.h>
30 #include <vlc_dialog.h>
34 #define CACHING_TEXT N_("Caching value (ms)")
35 #define CACHING_LONGTEXT N_( \
36 "The cache size (delay) for digital broadcasts (in milliseconds).")
38 #define ADAPTER_TEXT N_("DVB adapter")
39 #define ADAPTER_LONGTEXT N_( \
40 "If there is more than one digital broadcasting adapter, " \
41 "the adapter number must be selected. Numbering start from zero.")
43 #define DEVICE_TEXT N_("DVB device")
44 #define DEVICE_LONGTEXT N_( \
45 "If the selected adapter has more than one tuner, " \
46 "the tuner number must be selected. Numbering start from zero.")
48 #define BUDGET_TEXT N_("Do not demultiplex")
49 #define BUDGET_LONGTEXT N_( \
50 "Only useful programs are normally demultiplexed from the transponder. " \
51 "This option will disable demultiplexing and receive all programs.")
53 #define FREQ_TEXT N_("Frequency (Hz)")
54 #define FREQ_LONGTEXT N_( \
55 "TV channels are grouped by transponder (a.k.a. multiplex) " \
56 "on a given frequency. This is required to tune the receiver.")
58 #define MODULATION_TEXT N_("Modulation / Constellation")
59 #define MODULATION_LONGTEXT N_( \
60 "The digital signal can be modulated according with different " \
61 "constellations (depending on the delivery system). " \
62 "If the demodulator cannot detect the constellation automatically, " \
63 "it needs to be configured manually.")
64 static const char *const modulation_vlc[] = { "",
65 "QAM", "16QAM", "32QAM", "64QAM", "128QAM", "256QAM",
67 "QPSK", "DQPSK", "8PSK", "16APSK", "32APSK",
69 static const char *const modulation_user[] = { N_("Undefined"),
70 "Auto QAM", "16-QAM", "32-QAM", "64-QAM", "128-QAM", "256-QAM",
72 "QPSK", "DQPSK", "8-PSK", "16-APSK", "32-APSK",
75 #define SRATE_TEXT N_("Symbol rate (bauds)")
76 #define SRATE_LONGTEXT N_( \
77 "The symbol rate must be specified manually for some systems, " \
78 "notably DVB-C, DVB-S and DVB-S2.")
80 #define INVERSION_TEXT N_("Spectrum inversion")
81 #define INVERSION_LONGTEXT N_( \
82 "If the demodulator cannot detect spectral inversion correctly, " \
83 "it needs to be configured manually.")
84 const int inversion_vlc[] = { -1, 0, 1 };
85 static const char *const auto_off_on[] = { N_("Automatic"),
86 N_("Off"), N_("On") };
88 #define CODE_RATE_TEXT N_("FEC code rate")
89 #define CODE_RATE_HP_TEXT N_("High-priority code rate")
90 #define CODE_RATE_LP_TEXT N_("Low-priority code rate")
91 #define CODE_RATE_LONGTEXT N_( \
92 "The code rate for Forward Error Correction can be specified.")
93 static const char *const code_rate_vlc[] = { "",
94 "none", /*"1/4", "1/3",*/ "1/2", "3/5", "2/3", "3/4",
95 "4/5", "5/6", "6/7", "7/8", "8/9", "9/10",
97 static const char *const code_rate_user[] = { N_("Automatic"),
98 N_("None"), /*"1/4", "1/3",*/ "1/2", "3/5", "2/3", "3/4",
99 "4/5", "5/6", "6/7", "7/8", "8/9", "9/10",
102 #define TRANSMISSION_TEXT N_("Transmission mode")
103 const int transmission_vlc[] = { -1,
106 static const char *const transmission_user[] = { N_("Automatic"),
107 "2k", "4k", "8k", /*"16k", "32k", */
110 #define BANDWIDTH_TEXT N_("Bandwidth (MHz)")
111 const int bandwidth_vlc[] = { 0,
114 static const char *const bandwidth_user[] = { N_("Automatic"),
115 N_("8 MHz"), N_("7 MHz"), N_("6 MHz"),
118 #define GUARD_TEXT N_("Guard interval")
119 const char *const guard_vlc[] = { "",
120 /*"1/128",*/ "1/32", "1/16", /*"19/128",*/ "1/8", /*"9/256",*/ "1/4",
122 static const char *const guard_user[] = { N_("Automatic"),
123 /*"1/128",*/ "1/32", "1/16", /*"19/128",*/ "1/8", /*"9/256",*/ "1/4",
126 #define HIERARCHY_TEXT N_("Hierarchy mode")
127 const int hierarchy_vlc[] = { -1,
130 static const char *const hierarchy_user[] = { N_("Automatic"),
131 N_("None"), "1", "2", "4",
134 static int Open (vlc_object_t *);
135 static void Close (vlc_object_t *);
138 set_shortname (N_("DTV"))
139 set_description (N_("Digital Television and Radio (Linux DVB)"))
140 set_category (CAT_INPUT)
141 set_subcategory (SUBCAT_INPUT_ACCESS)
142 set_capability ("access", 0)
143 set_callbacks (Open, Close)
144 add_shortcut ("dtv", "tv", "dvb", /* "radio", "dab",*/
145 "cable", "dvb-c", /*"satellite", "dvb-s", "dvb-s2",*/
146 "terrestrial", "dvb-t", "atsc")
148 /* All options starting with dvb- can be overriden in the MRL, so they
149 * must all be "safe". Nevertheless, we do not mark as safe those that are
150 * really specific to the local system (e.g. device ID...).
151 * It wouldn't make sense to deliver those through a playlist. */
153 add_integer ("dvb-caching", DEFAULT_PTS_DELAY / 1000,
154 CACHING_TEXT, CACHING_LONGTEXT, true)
155 change_integer_range (0, 60000)
158 add_integer ("dvb-adapter", 0, ADAPTER_TEXT, ADAPTER_LONGTEXT, false)
159 change_integer_range (0, 255)
160 add_integer ("dvb-device", 0, DEVICE_TEXT, DEVICE_LONGTEXT, false)
161 change_integer_range (0, 255)
162 add_bool ("dvb-budget-mode", false, BUDGET_TEXT, BUDGET_LONGTEXT, true)
164 add_integer ("dvb-frequency", 0, FREQ_TEXT, FREQ_LONGTEXT, false)
165 change_integer_range (0, UINT64_C(0xffffffff) * 1000)
167 add_string ("dvb-modulation", 0,
168 MODULATION_TEXT, MODULATION_LONGTEXT, false)
169 change_string_list (modulation_vlc, modulation_user, NULL)
171 /* Legacy modulation option for backward compatibility: TODO */
172 /*add_integer ("dvb-modulation", 0, " ", " ", true)
173 change_integer_range (-1, 256)
176 add_integer ("dvb-inversion", -1, INVERSION_TEXT, INVERSION_LONGTEXT, true)
177 change_integer_list (inversion_vlc, auto_off_on)
180 set_section (N_("Terrestrial reception parameters"), NULL)
181 add_integer ("dvb-bandwidth", -1, BANDWIDTH_TEXT, BANDWIDTH_TEXT, true)
182 change_integer_list (bandwidth_vlc, bandwidth_user)
184 add_string ("dvb-code-rate-hp", "",
185 CODE_RATE_HP_TEXT, CODE_RATE_LONGTEXT, false)
186 change_string_list (code_rate_vlc, code_rate_user, NULL)
188 add_string ("dvb-code-rate-lp", "",
189 CODE_RATE_LP_TEXT, CODE_RATE_LONGTEXT, false)
190 change_string_list (code_rate_vlc, code_rate_user, NULL)
192 add_integer ("dvb-transmission", 0,
193 TRANSMISSION_TEXT, TRANSMISSION_TEXT, true)
194 change_integer_list (transmission_vlc, transmission_user)
196 add_string ("dvb-guard", "", GUARD_TEXT, GUARD_TEXT, true)
197 change_string_list (guard_vlc, guard_user, NULL)
199 add_integer ("dvb-hierarchy", -1, HIERARCHY_TEXT, HIERARCHY_TEXT, true)
200 change_integer_list (hierarchy_vlc, hierarchy_user)
203 set_section (N_("Cable (DVB-C) and satellite (DVB-S) parameters"), NULL)
204 add_integer ("dvb-srate", 0, SRATE_TEXT, SRATE_LONGTEXT, false)
205 change_integer_range (0, UINT64_C(0xffffffff))
207 add_string ("dvb-code-rate", "", CODE_RATE_TEXT, CODE_RATE_LONGTEXT, true)
208 change_string_list (code_rate_vlc, code_rate_user, NULL)
210 /* Legacy FEC option for backward compatibility: TODO */
211 add_integer ("dvb-fec", 9, " ", " ", true)
212 change_integer_range (0, 9)
216 set_section (N_("Satellite (DVB-S) parameters"), NULL)
217 add_integer ("dvb-satno", 0, SATNO_TEXT, SATNO_LONGTEXT, true)
218 change_integer_list (satno_vlc, satno_user)
220 add_integer ("dvb-voltage", 13, VOLTAGE_TEXT, VOLTAGE_LONGTEXT, true)
221 change_integer_list (voltage_vlc, voltage_user)
223 add_bool ("dvb-high-voltage", false,
224 HIGH_VOLTAGE_TEXT, HIGH_VOLTAGE_LONGTEXT, false)
225 add_integer ("dvb-tone", -1, TONE_TEXT, TONE_LONGTEXT, true)
226 change_integer_list (tone_vlc, auto_off_on)
228 add_integer ("dvb-lnb-lof1", 0, LNB_LOF1_TEXT, LNB_LOF1_LONGTEXT, true)
229 change_integer_range (0, 0x7fffffff)
231 add_integer ("dvb-lnb-lof2", 0, LNB_LOF2_TEXT, LNB_LOF2_LONGTEXT, true)
232 change_integer_range (0, 0x7fffffff)
234 add_integer ("dvb-lnb-slof", 0, LNB_SLOF_TEXT, LNB_SLOF_LONGTEXT, true)
235 change_integer_range (0, 0x7fffffff)
247 int (*setup) (vlc_object_t *, dvb_device_t *, uint64_t freq);
248 /* TODO: scan stuff */
251 static block_t *Read (access_t *);
252 static int Control (access_t *, int, va_list);
253 static const delsys_t *GuessSystem (const char *, dvb_device_t *);
254 static int Tune (vlc_object_t *, dvb_device_t *, const delsys_t *, uint64_t);
256 static int Open (vlc_object_t *obj)
258 access_t *access = (access_t *)obj;
259 access_sys_t *sys = malloc (sizeof (*sys));
260 if (unlikely(sys == NULL))
263 var_LocationParse (obj, access->psz_location, "dvb-");
264 uint64_t freq = var_InheritInteger (obj, "dvb-frequency");
266 dvb_device_t *dev = dvb_open (obj, freq != 0);
278 const delsys_t *delsys = GuessSystem (access->psz_access, dev);
279 if (delsys == NULL || Tune (obj, dev, delsys, freq))
281 msg_Err (obj, "tuning to %"PRIu64" Hz failed", freq);
282 dialog_Fatal (obj, N_("Digital broadcasting"),
283 N_("The selected digital tuner does not support "
284 "the specified parameters.\n"
285 "Please check the preferences."));
289 dvb_add_pid (dev, 0);
291 access->pf_block = Read;
292 access->pf_control = Control;
293 if (access->psz_demux == NULL || !access->psz_demux[0])
295 free (access->psz_demux);
296 access->psz_demux = strdup ("ts");
302 access->p_sys = NULL;
306 static void Close (vlc_object_t *obj)
308 access_t *access = (access_t *)obj;
309 access_sys_t *sys = access->p_sys;
311 dvb_close (sys->dev);
315 static block_t *Read (access_t *access)
317 #define BUFSIZE (20*188)
318 block_t *block = block_Alloc (BUFSIZE);
319 if (unlikely(block == NULL))
322 access_sys_t *sys = access->p_sys;
323 ssize_t val = dvb_read (sys->dev, block->p_buffer, BUFSIZE);
328 access->info.b_eof = true;
329 block_Release (block);
333 block->i_buffer = val;
337 static int Control (access_t *access, int query, va_list args)
339 access_sys_t *sys = access->p_sys;
340 dvb_device_t *dev = sys->dev;
344 case ACCESS_CAN_SEEK:
345 case ACCESS_CAN_FASTSEEK:
346 case ACCESS_CAN_PAUSE:
347 case ACCESS_CAN_CONTROL_PACE:
349 bool *v = va_arg (args, bool *);
354 case ACCESS_GET_PTS_DELAY:
356 int64_t *v = va_arg (args, int64_t *);
357 *v = var_InheritInteger (access, "dvb-caching") * INT64_C(1000);
361 case ACCESS_GET_TITLE_INFO:
362 case ACCESS_GET_META:
365 case ACCESS_GET_CONTENT_TYPE:
367 char **pt = va_arg (args, char **);
368 *pt = strdup ("video/MP2T");
372 case ACCESS_SET_PAUSE_STATE:
373 case ACCESS_SET_TITLE:
374 case ACCESS_SET_SEEKPOINT:
377 case ACCESS_GET_SIGNAL:
378 *va_arg (args, double *) = dvb_get_snr (dev);
379 *va_arg (args, double *) = dvb_get_signal_strength (dev);
382 case ACCESS_SET_PRIVATE_ID_STATE:
384 unsigned pid = va_arg (args, unsigned);
385 bool add = va_arg (args, unsigned);
387 if (unlikely(pid > 0x1FFF))
391 if (dvb_add_pid (dev, pid))
395 dvb_remove_pid (dev, pid);
399 case ACCESS_SET_PRIVATE_ID_CA:
403 case ACCESS_GET_PRIVATE_ID_STATE:
407 msg_Warn (access, "unimplemented query %d in control", query);
412 /*** Generic tuning ***/
414 /** Determines which delivery system to use. */
415 static const delsys_t *GuessSystem (const char *scheme, dvb_device_t *dev)
417 /* NOTE: We should guess the delivery system for the "cable", "satellite"
418 * and "terrestrial" shortcuts (i.e. DVB, ISDB, ATSC...). But there is
419 * seemingly no sane way to do get the info with Linux DVB version 5.2.
420 * In particular, the frontend infos distinguish only the modulator class
421 * (QPSK, QAM, OFDM or ATSC).
423 * Furthermore, if the demodulator supports 2G, we cannot guess whether
424 * 1G or 2G is intended. For backward compatibility, 1G is assumed
425 * (this is not a limitation of Linux DVB). We will probably need something
426 * smarter when 2G (semi automatic) scanning is implemented. */
427 if (!strcasecmp (scheme, "cable"))
430 if (!strcasecmp (scheme, "satellite"))
433 if (!strcasecmp (scheme, "terrestrial"))
436 if (!strcasecmp (scheme, "atsc"))
438 if (!strcasecmp (scheme, "dvb-c"))
440 if (!strcasecmp (scheme, "dvb-s"))
442 if (!strcasecmp (scheme, "dvb-s2"))
444 if (!strcasecmp (scheme, "dvb-t"))
447 return dvb_guess_system (dev);
450 /** Set parameters and tune the device */
451 static int Tune (vlc_object_t *obj, dvb_device_t *dev, const delsys_t *delsys,
454 if (delsys->setup (obj, dev, freq)
455 || dvb_set_inversion (dev, var_InheritInteger (obj, "dvb-inversion"))
463 static int atsc_setup (vlc_object_t *obj, dvb_device_t *dev, uint64_t freq)
465 char *mod = var_InheritString (obj, "dvb-modulation");
467 int ret = dvb_set_atsc (dev, freq, mod);
472 const delsys_t atsc = { .setup = atsc_setup };
476 static int dvbc_setup (vlc_object_t *obj, dvb_device_t *dev, uint64_t freq)
478 char *mod = var_InheritString (obj, "dvb-modulation");
479 char *fec = var_InheritString (obj, "dvb-code-rate");
480 unsigned srate = var_InheritInteger (obj, "dvb-srate");
482 int ret = dvb_set_dvbc (dev, freq, mod, srate, fec);
488 const delsys_t dvbc = { .setup = dvbc_setup };
492 static int dvbs_setup (vlc_object_t *obj, dvb_device_t *dev, uint64_t freq)
494 (void) dev; (void) freq;
495 msg_Err (obj, "DVB-S not implemented");
499 static int dvbs2_setup (vlc_object_t *obj, dvb_device_t *dev, uint64_t freq)
501 (void) dev; (void) freq;
502 msg_Err (obj, "DVB-S2 not implemented");
506 const delsys_t dvbs = { .setup = dvbs_setup };
507 const delsys_t dvbs2 = { .setup = dvbs2_setup };
511 static int dvbt_setup (vlc_object_t *obj, dvb_device_t *dev, uint64_t freq)
513 char *mod = var_InheritString (obj, "dvb-modulation");
514 char *fec_hp = var_InheritString (obj, "dvb-code-rate-hp");
515 char *fec_lp = var_InheritString (obj, "dvb-code-rate-lp");
516 char *guard = var_InheritString (obj, "dvb-guard");
517 uint32_t bw = var_InheritInteger (obj, "dvb-bandwidth");
518 int tx = var_InheritInteger (obj, "dvb-transmission");
519 int h = var_InheritInteger (obj, "dvb-hierarchy");
521 int ret = dvb_set_dvbt (dev, freq, mod, fec_hp, fec_lp, bw, tx, guard, h);
529 const delsys_t dvbt = { .setup = dvbt_setup };