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stream_dvb.c
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/*
dvbstream
(C) Dave Chapman <[email protected]> 2001, 2002.
(C) Rozhuk Ivan <[email protected]> 2016 - 2017
Original authors: Nico, probably Arpi
Some code based on dvbstream, 0.4.3-pre3 (CVS checkout),
http://sourceforge.net/projects/dvbtools/
Modified for use with MPlayer, for details see the changelog at
http://svn.mplayerhq.hu/mplayer/trunk/
$Id$
Copyright notice:
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <poll.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include "osdep/io.h"
#include "misc/ctype.h"
#include "osdep/timer.h"
#include "stream.h"
#include "common/tags.h"
#include "options/m_config.h"
#include "options/m_option.h"
#include "options/options.h"
#include "options/path.h"
#include "osdep/threads.h"
#include "dvbin.h"
#include "dvb_tune.h"
#if !HAVE_GPL
#error GPL only
#endif
#define CHANNEL_LINE_LEN 256
#define OPT_BASE_STRUCT dvb_opts_t
static dvb_state_t *global_dvb_state = NULL;
static mp_static_mutex global_dvb_state_lock = MP_STATIC_MUTEX_INITIALIZER;
const struct m_sub_options stream_dvb_conf = {
.opts = (const m_option_t[]) {
{"prog", OPT_STRING(cfg_prog), .flags = UPDATE_DVB_PROG},
{"card", OPT_INT(cfg_devno), M_RANGE(0, MAX_ADAPTERS-1)},
{"timeout", OPT_INT(cfg_timeout), M_RANGE(1, 30)},
{"file", OPT_STRING(cfg_file), .flags = M_OPT_FILE},
{"full-transponder", OPT_BOOL(cfg_full_transponder)},
{"channel-switch-offset", OPT_INT(cfg_channel_switch_offset),
.flags = UPDATE_DVB_PROG},
{0}
},
.size = sizeof(dvb_opts_t),
.defaults = &(const dvb_opts_t){
.cfg_prog = NULL,
.cfg_timeout = 30,
},
};
void dvbin_close(stream_t *stream);
static fe_code_rate_t parse_fec(const char *cr)
{
if (!strcmp(cr, "FEC_1_2")) {
return FEC_1_2;
} else if (!strcmp(cr, "FEC_2_3")) {
return FEC_2_3;
} else if (!strcmp(cr, "FEC_3_4")) {
return FEC_3_4;
} else if (!strcmp(cr, "FEC_4_5")) {
return FEC_4_5;
} else if (!strcmp(cr, "FEC_5_6")) {
return FEC_5_6;
} else if (!strcmp(cr, "FEC_6_7")) {
return FEC_6_7;
} else if (!strcmp(cr, "FEC_7_8")) {
return FEC_7_8;
} else if (!strcmp(cr, "FEC_8_9")) {
return FEC_8_9;
} else if (!strcmp(cr, "FEC_NONE")) {
return FEC_NONE;
}
return FEC_NONE;
}
static fe_modulation_t parse_vdr_modulation(const char** modstring)
{
static const struct { const char *s; fe_modulation_t v; } table[] = {
{ "16", QAM_16 },
{ "32", QAM_32 },
{ "64", QAM_64 },
{ "128", QAM_128 },
{ "256", QAM_256 },
{ "998", QAM_AUTO },
{ "2", QPSK },
{ "5", PSK_8 },
{ "6", APSK_16 },
{ "7", APSK_32 },
{ "10", VSB_8 },
{ "11", VSB_16 },
{ "12", DQPSK },
};
for (int i = 0; i < MP_ARRAY_SIZE(table); i++) {
if (!strncmp(*modstring, table[i].s, strlen(table[i].s))) {
*modstring += strlen(table[i].s);
return table[i].v;
}
}
return QAM_AUTO;
}
static void parse_vdr_par_string(const char *vdr_par_str, dvb_channel_t *ptr)
{
//FIXME: There is more information in this parameter string, especially related
// to non-DVB-S reception.
if (!vdr_par_str[0])
return;
const char *vdr_par = &vdr_par_str[0];
while (vdr_par && *vdr_par) {
switch (mp_toupper(*vdr_par)) {
case 'H':
ptr->pol = 'H';
vdr_par++;
break;
case 'V':
ptr->pol = 'V';
vdr_par++;
break;
case 'S':
vdr_par++;
ptr->is_dvb_x2 = *vdr_par == '1';
vdr_par++;
break;
case 'P':
vdr_par++;
char *endptr = NULL;
errno = 0;
int n = strtol(vdr_par, &endptr, 10);
if (!errno && endptr != vdr_par) {
ptr->stream_id = n;
vdr_par = endptr;
}
break;
case 'I':
vdr_par++;
ptr->inv = (*vdr_par == '1') ? INVERSION_ON : INVERSION_OFF;
vdr_par++;
break;
case 'M':
vdr_par++;
ptr->mod = parse_vdr_modulation(&vdr_par);
break;
default:
vdr_par++;
}
}
}
static char *dvb_strtok_r(char *s, const char *sep, char **p)
{
if (!s && !(s = *p))
return NULL;
/* Skip leading separators. */
s += strspn(s, sep);
/* s points at first non-separator, or end of string. */
if (!*s)
return *p = 0;
/* Move *p to next separator. */
*p = s + strcspn(s, sep);
if (**p) {
*(*p)++ = 0;
} else {
*p = 0;
}
return s;
}
static bool parse_pid_string(struct mp_log *log, char *pid_string,
dvb_channel_t *ptr)
{
if (!pid_string[0])
return false;
int pcnt = 0;
/* These tokens also catch vdr-style PID lists.
* They can contain 123=deu@3,124=eng+jap@4;125
* 3 and 4 are codes for codec type, =langLeft+langRight is allowed,
* and ; may separate a dolby channel.
* With the numChars-test and the full token-list, all is handled
* gracefully.
*/
const char *tokens = "+,;";
char *pidPart;
char *savePtr = NULL;
pidPart = dvb_strtok_r(pid_string, tokens, &savePtr);
while (pidPart != NULL) {
if (ptr->pids_cnt >= DMX_FILTER_SIZE - 1) {
mp_verbose(log, "Maximum number of PIDs for one channel "
"reached, ignoring further ones!\n");
break;
}
int numChars = 0;
int pid = 0;
pcnt += sscanf(pidPart, "%d%n", &pid, &numChars);
if (numChars > 0) {
ptr->pids[ptr->pids_cnt] = pid;
ptr->pids_cnt++;
}
pidPart = dvb_strtok_r(NULL, tokens, &savePtr);
}
return pcnt > 0;
}
static dvb_channels_list_t *dvb_get_channels(struct mp_log *log,
dvb_channels_list_t *list_add,
int cfg_full_transponder,
char *filename,
unsigned int frontend,
int delsys, unsigned int delsys_mask)
{
dvb_channels_list_t *list = list_add;
if (!filename)
return list;
const char *cbl_conf =
"%d:%255[^:]:%d:%255[^:]:%255[^:]:%255[^:]:%255[^:]\n";
const char *sat_conf = "%d:%c:%d:%d:%255[^:]:%255[^:]\n";
const char *ter_conf =
"%d:%255[^:]:%255[^:]:%255[^:]:%255[^:]:%255[^:]:%255[^:]:%255[^:]:%255[^:]:%255[^:]:%255[^:]\n";
const char *atsc_conf = "%d:%255[^:]:%255[^:]:%255[^:]\n";
const char *vdr_conf =
"%d:%255[^:]:%255[^:]:%d:%255[^:]:%255[^:]:%255[^:]:%*255[^:]:%d:%*d:%*d:%*d\n%n";
mp_verbose(log, "Reading config file %s for type %s\n",
filename, get_dvb_delsys(delsys));
FILE *f = fopen(filename, "r");
if (!f) {
mp_fatal(log, "Can't open file %s\n", filename);
return list;
}
if (!list)
list = talloc_zero(NULL, dvb_channels_list_t);
while (!feof(f)) {
char line[CHANNEL_LINE_LEN];
if (!fgets(line, CHANNEL_LINE_LEN, f))
continue;
if (line[0] == '#' || strlen(line) == 0)
continue;
dvb_channel_t chn = {0};
dvb_channel_t *ptr = &chn;
char tmp_lcr[256], tmp_hier[256], inv[256], bw[256], cr[256], mod[256],
transm[256], gi[256], vpid_str[256], apid_str[256], tpid_str[256],
vdr_par_str[256], vdr_loc_str[256];
vpid_str[0] = apid_str[0] = tpid_str[0] = 0;
vdr_loc_str[0] = vdr_par_str[0] = 0;
char *colon = strchr(line, ':');
if (!colon)
continue;
int k = colon - line;
if (!k)
continue;
// In some modern VDR-style configs, channel name also has bouquet after ;.
// Parse that off, we ignore it.
char *bouquet_sep = strchr(line, ';');
{
int namelen = k;
if (bouquet_sep && bouquet_sep < colon)
namelen = bouquet_sep - line;
ptr->name = talloc_strndup(list, line, namelen);
}
k++;
ptr->pids_cnt = 0;
ptr->freq = 0;
ptr->service_id = -1;
ptr->is_dvb_x2 = false;
ptr->frontend = frontend;
ptr->delsys = delsys;
ptr->diseqc = 0;
ptr->stream_id = NO_STREAM_ID_FILTER;
ptr->inv = INVERSION_AUTO;
ptr->bw = BANDWIDTH_AUTO;
ptr->cr = FEC_AUTO;
ptr->cr_lp = FEC_AUTO;
ptr->mod = QAM_AUTO;
ptr->hier = HIERARCHY_AUTO;
ptr->gi = GUARD_INTERVAL_AUTO;
ptr->trans = TRANSMISSION_MODE_AUTO;
// Check if VDR-type channels.conf-line - then full line is consumed by the scan.
int fields, num_chars = 0;
fields = sscanf(&line[k], vdr_conf,
&ptr->freq, vdr_par_str, vdr_loc_str, &ptr->srate,
vpid_str, apid_str, tpid_str, &ptr->service_id,
&num_chars);
bool is_vdr_conf = (num_chars == strlen(&line[k]));
// Special case: DVB-T style ZAP config also has 13 columns.
// Most columns should have non-numeric content, but some channel list generators insert 0
// if a value is not used. However, INVERSION_* should always set after frequency.
if (is_vdr_conf && !strncmp(vdr_par_str, "INVERSION_", 10)) {
is_vdr_conf = false;
}
if (is_vdr_conf) {
// Modulation parsed here, not via old xine-parsing path.
mod[0] = '\0';
// It's a VDR-style config line.
parse_vdr_par_string(vdr_par_str, ptr);
// Frequency in VDR-style config files is in MHz for DVB-S,
// and may be in MHz, kHz or Hz for DVB-C and DVB-T.
// General rule to get useful units is to multiply by 1000 until value is larger than 1000000.
while (ptr->freq < 1000000U) {
ptr->freq *= 1000U;
}
// Symbol rate in VDR-style config files is divided by 1000.
ptr->srate *= 1000U;
switch (delsys) {
case SYS_DVBT:
case SYS_DVBT2:
/* Fix delsys value. */
if (ptr->is_dvb_x2) {
ptr->delsys = delsys = SYS_DVBT2;
} else {
ptr->delsys = delsys = SYS_DVBT;
}
if (!DELSYS_IS_SET(delsys_mask, delsys))
continue; /* Skip channel. */
mp_verbose(log, "VDR, %s, NUM: %d, NUM_FIELDS: %d, NAME: %s, "
"FREQ: %d, SRATE: %d, T2: %s\n",
get_dvb_delsys(delsys),
list->NUM_CHANNELS, fields,
ptr->name, ptr->freq, ptr->srate,
(delsys == SYS_DVBT2) ? "yes" : "no");
break;
case SYS_DVBC_ANNEX_A:
case SYS_DVBC_ANNEX_C:
case SYS_ATSC:
case SYS_DVBC_ANNEX_B:
case SYS_ISDBT:
mp_verbose(log, "VDR, %s, NUM: %d, NUM_FIELDS: %d, NAME: %s, "
"FREQ: %d, SRATE: %d\n",
get_dvb_delsys(delsys),
list->NUM_CHANNELS, fields,
ptr->name, ptr->freq, ptr->srate);
break;
case SYS_DVBS:
case SYS_DVBS2:
/* Fix delsys value. */
if (ptr->is_dvb_x2) {
ptr->delsys = delsys = SYS_DVBS2;
} else {
ptr->delsys = delsys = SYS_DVBS;
}
if (!DELSYS_IS_SET(delsys_mask, delsys))
continue; /* Skip channel. */
if (vdr_loc_str[0]) {
// In older vdr config format, this field contained the DISEQc information.
// If it is numeric, assume that's it.
int diseqc_info = 0;
int valid_digits = 0;
if (sscanf(vdr_loc_str, "%d%n", &diseqc_info,
&valid_digits) == 1)
{
if (valid_digits == strlen(vdr_loc_str)) {
ptr->diseqc = (unsigned int)diseqc_info;
if (ptr->diseqc > 4)
continue;
if (ptr->diseqc > 0)
ptr->diseqc--;
}
}
}
mp_verbose(log, "VDR, %s, NUM: %d, NUM_FIELDS: %d, NAME: %s, "
"FREQ: %d, SRATE: %d, POL: %c, DISEQC: %d, S2: %s, "
"StreamID: %d, SID: %d\n",
get_dvb_delsys(delsys),
list->NUM_CHANNELS,
fields, ptr->name, ptr->freq, ptr->srate, ptr->pol,
ptr->diseqc, (delsys == SYS_DVBS2) ? "yes" : "no",
ptr->stream_id, ptr->service_id);
break;
default:
break;
}
} else {
// ZAP style channel config file.
switch (delsys) {
case SYS_DVBT:
case SYS_DVBT2:
case SYS_ISDBT:
fields = sscanf(&line[k], ter_conf,
&ptr->freq, inv, bw, cr, tmp_lcr, mod,
transm, gi, tmp_hier, vpid_str, apid_str);
mp_verbose(log, "%s, NUM: %d, NUM_FIELDS: %d, NAME: %s, FREQ: %d\n",
get_dvb_delsys(delsys), list->NUM_CHANNELS,
fields, ptr->name, ptr->freq);
break;
case SYS_DVBC_ANNEX_A:
case SYS_DVBC_ANNEX_C:
fields = sscanf(&line[k], cbl_conf,
&ptr->freq, inv, &ptr->srate,
cr, mod, vpid_str, apid_str);
mp_verbose(log, "%s, NUM: %d, NUM_FIELDS: %d, NAME: %s, FREQ: %d, "
"SRATE: %d\n",
get_dvb_delsys(delsys),
list->NUM_CHANNELS, fields, ptr->name,
ptr->freq, ptr->srate);
break;
case SYS_ATSC:
case SYS_DVBC_ANNEX_B:
fields = sscanf(&line[k], atsc_conf,
&ptr->freq, mod, vpid_str, apid_str);
mp_verbose(log, "%s, NUM: %d, NUM_FIELDS: %d, NAME: %s, FREQ: %d\n",
get_dvb_delsys(delsys), list->NUM_CHANNELS,
fields, ptr->name, ptr->freq);
break;
case SYS_DVBS:
case SYS_DVBS2:
fields = sscanf(&line[k], sat_conf,
&ptr->freq, &ptr->pol, &ptr->diseqc, &ptr->srate,
vpid_str,
apid_str);
ptr->pol = mp_toupper(ptr->pol);
ptr->freq *= 1000U;
ptr->srate *= 1000U;
if (ptr->diseqc > 4)
continue;
if (ptr->diseqc > 0)
ptr->diseqc--;
mp_verbose(log, "%s, NUM: %d, NUM_FIELDS: %d, NAME: %s, FREQ: %d, "
"SRATE: %d, POL: %c, DISEQC: %d\n",
get_dvb_delsys(delsys),
list->NUM_CHANNELS, fields, ptr->name, ptr->freq,
ptr->srate, ptr->pol, ptr->diseqc);
break;
default:
break;
}
}
if (parse_pid_string(log, vpid_str, ptr))
fields++;
if (parse_pid_string(log, apid_str, ptr))
fields++;
/* If we do not know the service_id, PMT can not be extracted.
Teletext decoding will fail without PMT. */
if (ptr->service_id != -1) {
if (parse_pid_string(log, tpid_str, ptr))
fields++;
}
if (fields < 2 || ptr->pids_cnt == 0 || ptr->freq == 0 ||
strlen(ptr->name) == 0)
continue;
/* Add some PIDs which are mandatory in DVB,
* and contain human-readable helpful data. */
/* This is the STD, the service description table.
* It contains service names and such, ffmpeg decodes it. */
ptr->pids[ptr->pids_cnt] = 0x0011;
ptr->pids_cnt++;
/* This is the EIT, which contains EPG data.
* ffmpeg can not decode it (yet), but e.g. VLC
* shows what was recorded. */
ptr->pids[ptr->pids_cnt] = 0x0012;
ptr->pids_cnt++;
if (ptr->service_id != -1) {
/* We have the PMT-PID in addition.
This will be found later, when we tune to the channel.
Push back here to create the additional demux. */
ptr->pids[ptr->pids_cnt] = -1; // Placeholder.
ptr->pids_cnt++;
}
bool has8192 = false, has0 = false;
for (int cnt = 0; cnt < ptr->pids_cnt; cnt++) {
if (ptr->pids[cnt] == 8192)
has8192 = true;
if (ptr->pids[cnt] == 0)
has0 = true;
}
/* 8192 is the pseudo-PID for full TP dump,
enforce that if requested. */
if (!has8192 && cfg_full_transponder)
has8192 = 1;
if (has8192) {
ptr->pids[0] = 8192;
ptr->pids_cnt = 1;
} else if (!has0) {
ptr->pids[ptr->pids_cnt] = 0; //PID 0 is the PAT
ptr->pids_cnt++;
}
mp_verbose(log, " PIDS: ");
for (int cnt = 0; cnt < ptr->pids_cnt; cnt++)
mp_verbose(log, " %d ", ptr->pids[cnt]);
mp_verbose(log, "\n");
switch (delsys) {
case SYS_DVBT:
case SYS_DVBT2:
case SYS_ISDBT:
case SYS_DVBC_ANNEX_A:
case SYS_DVBC_ANNEX_C:
if (!strcmp(inv, "INVERSION_ON")) {
ptr->inv = INVERSION_ON;
} else if (!strcmp(inv, "INVERSION_OFF")) {
ptr->inv = INVERSION_OFF;
}
ptr->cr = parse_fec(cr);
}
switch (delsys) {
case SYS_DVBT:
case SYS_DVBT2:
case SYS_ISDBT:
case SYS_DVBC_ANNEX_A:
case SYS_DVBC_ANNEX_C:
case SYS_ATSC:
case SYS_DVBC_ANNEX_B:
if (!strcmp(mod, "QAM_128")) {
ptr->mod = QAM_128;
} else if (!strcmp(mod, "QAM_256")) {
ptr->mod = QAM_256;
} else if (!strcmp(mod, "QAM_64")) {
ptr->mod = QAM_64;
} else if (!strcmp(mod, "QAM_32")) {
ptr->mod = QAM_32;
} else if (!strcmp(mod, "QAM_16")) {
ptr->mod = QAM_16;
} else if (!strcmp(mod, "VSB_8") || !strcmp(mod, "8VSB")) {
ptr->mod = VSB_8;
} else if (!strcmp(mod, "VSB_16") || !strcmp(mod, "16VSB")) {
ptr->mod = VSB_16;
}
}
/* Modulation defines real delsys for ATSC:
Terrestrial (VSB) is SYS_ATSC, Cable (QAM) is SYS_DVBC_ANNEX_B. */
if (delsys == SYS_ATSC || delsys == SYS_DVBC_ANNEX_B) {
if (ptr->mod == VSB_8 || ptr->mod == VSB_16) {
delsys = SYS_ATSC;
} else {
delsys = SYS_DVBC_ANNEX_B;
}
if (!DELSYS_IS_SET(delsys_mask, delsys))
continue; /* Skip channel. */
mp_verbose(log, "Switched to delivery system for ATSC: %s (guessed from modulation)\n",
get_dvb_delsys(delsys));
}
switch (delsys) {
case SYS_DVBT:
case SYS_DVBT2:
case SYS_ISDBT:
if (!strcmp(bw, "BANDWIDTH_5_MHZ")) {
ptr->bw = BANDWIDTH_5_MHZ;
} else if (!strcmp(bw, "BANDWIDTH_6_MHZ")) {
ptr->bw = BANDWIDTH_6_MHZ;
} else if (!strcmp(bw, "BANDWIDTH_7_MHZ")) {
ptr->bw = BANDWIDTH_7_MHZ;
} else if (!strcmp(bw, "BANDWIDTH_8_MHZ")) {
ptr->bw = BANDWIDTH_8_MHZ;
} else if (!strcmp(bw, "BANDWIDTH_10_MHZ")) {
ptr->bw = BANDWIDTH_10_MHZ;
}
if (!strcmp(transm, "TRANSMISSION_MODE_2K")) {
ptr->trans = TRANSMISSION_MODE_2K;
} else if (!strcmp(transm, "TRANSMISSION_MODE_8K")) {
ptr->trans = TRANSMISSION_MODE_8K;
} else if (!strcmp(transm, "TRANSMISSION_MODE_AUTO")) {
ptr->trans = TRANSMISSION_MODE_AUTO;
}
if (!strcmp(gi, "GUARD_INTERVAL_1_32")) {
ptr->gi = GUARD_INTERVAL_1_32;
} else if (!strcmp(gi, "GUARD_INTERVAL_1_16")) {
ptr->gi = GUARD_INTERVAL_1_16;
} else if (!strcmp(gi, "GUARD_INTERVAL_1_8")) {
ptr->gi = GUARD_INTERVAL_1_8;
} else if (!strcmp(gi, "GUARD_INTERVAL_1_4")) {
ptr->gi = GUARD_INTERVAL_1_4;
}
ptr->cr_lp = parse_fec(tmp_lcr);
if (!strcmp(tmp_hier, "HIERARCHY_1")) {
ptr->hier = HIERARCHY_1;
} else if (!strcmp(tmp_hier, "HIERARCHY_2")) {
ptr->hier = HIERARCHY_2;
} else if (!strcmp(tmp_hier, "HIERARCHY_4")) {
ptr->hier = HIERARCHY_4;
} else if (!strcmp(tmp_hier, "HIERARCHY_NONE")) {
ptr->hier = HIERARCHY_NONE;
}
}
MP_TARRAY_APPEND(list, list->channels, list->NUM_CHANNELS, *ptr);
}
fclose(f);
if (list->NUM_CHANNELS == 0)
TA_FREEP(&list);
return list;
}
static int dvb_streaming_read(stream_t *stream, void *buffer, int size)
{
dvb_priv_t *priv = stream->priv;
dvb_state_t *state = priv->state;
int pos = 0;
int tries = state->retry;
const int fd = state->dvr_fd;
MP_TRACE(stream, "dvb_streaming_read(%d)\n", size);
struct pollfd pfds[1];
pfds[0].fd = fd;
pfds[0].events = POLLIN | POLLPRI;
while (pos < size) {
int rk = read(fd, (char *)buffer + pos, (size - pos));
if (rk <= 0) {
if (pos || tries == 0)
break;
tries--;
if (poll(pfds, 1, 2000) <= 0) {
MP_ERR(stream, "dvb_streaming_read: failed with "
"errno %d when reading %d bytes\n", errno, size - pos);
errno = 0;
break;
}
continue;
}
pos += rk;
MP_TRACE(stream, "got %d bytes\n", pos);
}
if (!pos)
MP_ERR(stream, "dvb_streaming_read: returning 0 bytes\n");
// Check if config parameters have been updated.
dvb_update_config(stream);
return pos;
}
int dvb_set_channel(stream_t *stream, unsigned int adapter, unsigned int n)
{
dvb_priv_t *priv = stream->priv;
dvb_state_t *state = priv->state;
assert(adapter < state->adapters_count);
int devno = state->adapters[adapter].devno;
dvb_channels_list_t *new_list = state->adapters[adapter].list;
assert(n < new_list->NUM_CHANNELS);
dvb_channel_t *channel = &(new_list->channels[n]);
if (state->is_on) { //the fds are already open and we have to stop the demuxers
/* Remove all demuxes. */
dvb_fix_demuxes(priv, 0);
state->retry = 0;
// empty both the stream's and driver's buffer
char buf[4096];
while (dvb_streaming_read(stream, buf, sizeof(buf)) > 0) {}
if (state->cur_adapter != adapter ||
state->cur_frontend != channel->frontend) {
dvbin_close(stream);
if (!dvb_open_devices(priv, devno, channel->frontend, channel->pids_cnt)) {
MP_ERR(stream, "dvb_set_channel: couldn't open devices of adapter "
"%d\n", devno);
return 0;
}
} else {
// close all demux_fds with pos > pids required for the new channel
// or open other demux_fds if we have too few
if (!dvb_fix_demuxes(priv, channel->pids_cnt))
return 0;
}
} else {
if (!dvb_open_devices(priv, devno, channel->frontend, channel->pids_cnt)) {
MP_ERR(stream, "dvb_set_channel: couldn't open devices of adapter "
"%d\n", devno);
return 0;
}
}
state->retry = 5;
new_list->current = n;
MP_VERBOSE(stream, "dvb_set_channel: new channel name=\"%s\", adapter: %d, "
"channel: %d\n", channel->name, devno, n);
if (channel->freq != state->last_freq) {
if (!dvb_tune(priv, channel->delsys, channel->freq,
channel->pol, channel->srate, channel->diseqc,
channel->stream_id, channel->inv,
channel->mod, channel->gi,
channel->trans, channel->bw, channel->cr, channel->cr_lp,
channel->hier, priv->opts->cfg_timeout))
return 0;
}
state->is_on = true;
state->last_freq = channel->freq;
state->cur_adapter = adapter;
state->cur_frontend = channel->frontend;
if (channel->service_id != -1) {
/* We need the PMT-PID in addition.
If it has not yet beem resolved, do it now. */
for (int i = 0; i < channel->pids_cnt; i++) {
if (channel->pids[i] == -1) {
MP_VERBOSE(stream, "dvb_set_channel: PMT-PID for service %d "
"not resolved yet, parsing PAT...\n",
channel->service_id);
int pmt_pid = dvb_get_pmt_pid(priv, adapter, channel->service_id);
MP_VERBOSE(stream, "found PMT-PID: %d\n", pmt_pid);
channel->pids[i] = pmt_pid;
break;
}
}
}
// sets demux filters and restart the stream
for (int i = 0; i < channel->pids_cnt; i++) {
if (channel->pids[i] == -1) {
// In case PMT was not resolved, skip it here.
MP_ERR(stream, "dvb_set_channel: PMT-PID not found, "
"teletext decoding may fail.\n");
continue;
}
if (!dvb_set_ts_filt(priv, state->demux_fds[i], channel->pids[i],
DMX_PES_OTHER))
return 0;
}
return 1;
}
static int dvbin_stream_control(struct stream *s, int cmd, void *arg)
{
dvb_priv_t *priv = s->priv;
dvb_state_t *state = priv->state;
if (state->cur_adapter >= state->adapters_count)
return STREAM_ERROR;
dvb_channels_list_t *list = state->adapters[state->cur_adapter].list;
switch (cmd) {
case STREAM_CTRL_GET_METADATA: {
struct mp_tags *metadata = talloc_zero(NULL, struct mp_tags);
char *progname = list->channels[list->current].name;
mp_tags_set_str(metadata, "title", progname);
*(struct mp_tags **)arg = metadata;
return STREAM_OK;
}
}
return STREAM_UNSUPPORTED;
}
void dvbin_close(stream_t *stream)
{
dvb_priv_t *priv = stream->priv;
dvb_state_t *state = priv->state;
if (state->switching_channel && state->is_on) {
// Prevent state destruction, reset channel-switch.
state->switching_channel = false;
mp_mutex_lock(&global_dvb_state_lock);
global_dvb_state->stream_used = false;
mp_mutex_unlock(&global_dvb_state_lock);
return;
}
for (int i = state->demux_fds_cnt - 1; i >= 0; i--) {
state->demux_fds_cnt--;
close(state->demux_fds[i]);
}
close(state->dvr_fd);
close(state->fe_fd);
state->fe_fd = state->dvr_fd = -1;
state->is_on = false;
state->cur_adapter = -1;
state->cur_frontend = -1;
mp_mutex_lock(&global_dvb_state_lock);
TA_FREEP(&global_dvb_state);
mp_mutex_unlock(&global_dvb_state_lock);
}
static int dvb_streaming_start(stream_t *stream, char *progname)
{
dvb_priv_t *priv = stream->priv;
dvb_state_t *state = priv->state;
if (!progname)
return 0;
dvb_channels_list_t *list = state->adapters[state->cur_adapter].list;
dvb_channel_t *channel = NULL;
int i;
for (i = 0; i < list->NUM_CHANNELS; i ++) {
if (!strcmp(list->channels[i].name, progname)) {
channel = &(list->channels[i]);
break;
}
}
if (!channel) {
MP_ERR(stream, "no such channel \"%s\"\n", progname);
return 0;
}
list->current = i;
// When switching channels, cfg_channel_switch_offset
// keeps the offset to the initially chosen channel.
list->current = (list->NUM_CHANNELS + list->current +
priv->opts->cfg_channel_switch_offset) % list->NUM_CHANNELS;
channel = &(list->channels[list->current]);
MP_INFO(stream, "Tuning to channel \"%s\"...\n", channel->name);
MP_VERBOSE(stream, "Program number %d: name=\"%s\", freq=%u\n", i,
channel->name, channel->freq);
if (!dvb_set_channel(stream, state->cur_adapter, list->current)) {
dvbin_close(stream);
return 0;
}
return 1;
}
void dvb_update_config(stream_t *stream)
{
dvb_priv_t *priv = stream->priv;
dvb_state_t *state = priv->state;
// Throttle the check to at maximum once every 0.1 s.
int now = (int)(mp_time_sec()*10);
if (now == priv->opts_check_time)
return;
priv->opts_check_time = now;
if (!m_config_cache_update(priv->opts_cache))
return;
// Re-parse stream path, if we have cfg parameters now,
// these should be preferred.
if (!dvb_parse_path(stream)) {
MP_ERR(stream, "error parsing DVB config, not tuning.");
return;
}
int r = dvb_streaming_start(stream, priv->prog);
if (r) {
// Stream will be pulled down after channel switch,
// persist state.
state->switching_channel = true;
}
}
static int dvb_open(stream_t *stream)
{
dvb_priv_t *priv = NULL;
mp_mutex_lock(&global_dvb_state_lock);
if (global_dvb_state && global_dvb_state->stream_used) {
MP_ERR(stream, "DVB stream already in use, only one DVB stream can exist at a time!\n");
mp_mutex_unlock(&global_dvb_state_lock);
goto err_out;
}
// Need to re-get config in any case, not part of global state.
stream->priv = talloc_zero(stream, dvb_priv_t);
priv = stream->priv;
priv->opts_cache = m_config_cache_alloc(stream, stream->global, &stream_dvb_conf);
priv->opts = priv->opts_cache->opts;
dvb_state_t *state = dvb_get_state(stream);
priv->state = state;
priv->log = stream->log;
if (!state) {
MP_ERR(stream, "DVB configuration is empty\n");
mp_mutex_unlock(&global_dvb_state_lock);
goto err_out;
}
if (!dvb_parse_path(stream)) {
mp_mutex_unlock(&global_dvb_state_lock);
goto err_out;
}
state->stream_used = true;
mp_mutex_unlock(&global_dvb_state_lock);
if (!state->is_on) {
// State could be already initialized, for example, we just did a channel switch.
// The following setup only has to be done once.
state->cur_frontend = -1;
if (!dvb_streaming_start(stream, priv->prog))
goto err_out;
}
stream->fill_buffer = dvb_streaming_read;
stream->close = dvbin_close;
stream->control = dvbin_stream_control;
stream->streaming = true;
stream->demuxer = "lavf";
stream->lavf_type = "mpegts";
return STREAM_OK;
err_out:
talloc_free(priv);
stream->priv = NULL;
return STREAM_ERROR;
}
int dvb_parse_path(stream_t *stream)
{
dvb_priv_t *priv = stream->priv;
dvb_state_t *state = priv->state;
// Parse stream path. Common rule: cfg wins over stream path,
// since cfg may be changed at runtime.
bstr prog, devno;
if (!bstr_split_tok(bstr0(stream->path), "@", &devno, &prog)) {
prog = devno;
devno.len = 0;
}
if (priv->opts->cfg_devno != 0) {
priv->devno = priv->opts->cfg_devno;
} else if (devno.len) {
bstr r;
priv->devno = bstrtoll(devno, &r, 0);
if (r.len || priv->devno < 0 || priv->devno >= MAX_ADAPTERS) {
MP_ERR(stream, "invalid devno: '%.*s'\n", BSTR_P(devno));
return 0;
}
} else {
// Default to the default of cfg_devno.