[Redbutton-devel] SF.net SVN: redbutton: [297] redbutton-download/trunk/channels.c
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[Redbutton-devel] SF.net SVN: redbutton: [297] redbutton-download/trunk/channels.c
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From: <ski...@us...> - 2007-04-28 19:30:53
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Revision: 297
http://svn.sourceforge.net/redbutton/?rev=297&view=rev
Author: skilvington
Date: 2007-04-28 12:30:47 -0700 (Sat, 28 Apr 2007)
Log Message:
-----------
allow DVB-S cards to retune (in theory anyway, I don't have a DVB-S card to test it)
Modified Paths:
--------------
redbutton-download/trunk/channels.c
Modified: redbutton-download/trunk/channels.c
===================================================================
--- redbutton-download/trunk/channels.c 2007-04-27 09:38:23 UTC (rev 296)
+++ redbutton-download/trunk/channels.c 2007-04-28 19:30:47 UTC (rev 297)
@@ -24,6 +24,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <ctype.h>
#include <stdint.h>
#include <stdbool.h>
#include <errno.h>
@@ -34,14 +35,29 @@
#include "utils.h"
+/* magic DVB-S values from dvbtune */
+#define SLOF (11700*1000UL)
+#define LOF1 (9750*1000UL)
+#define LOF2 (10600*1000UL)
+
/* internal functions */
-static bool get_tune_params(fe_type_t, uint16_t, struct dvb_frontend_parameters *);
+static bool get_tune_params(fe_type_t, uint16_t, struct dvb_frontend_parameters *, char *, unsigned int *);
static bool get_dvbt_tune_params(uint16_t, struct dvb_frontend_parameters *);
-static bool get_dvbs_tune_params(uint16_t, struct dvb_frontend_parameters *);
+static bool get_dvbs_tune_params(uint16_t, struct dvb_frontend_parameters *, char *, unsigned int *);
static bool get_dvbc_tune_params(uint16_t, struct dvb_frontend_parameters *);
static bool get_atsc_tune_params(uint16_t, struct dvb_frontend_parameters *);
+/* DISEQC code from dvbtune, written by Dave Chapman */
+struct diseqc_cmd
+{
+ struct dvb_diseqc_master_cmd cmd;
+ uint32_t wait;
+};
+
+static int do_diseqc(int, int, char, bool);
+static int diseqc_send_msg(int fd, fe_sec_voltage_t, struct diseqc_cmd *, fe_sec_tone_mode_t, fe_sec_mini_cmd_t);
+
/*
* returns "tzap" if the given DVB adapter is DVB-T,
* "szap" if it is DVB-S
@@ -241,7 +257,7 @@
*/
static bool
-get_tune_params(fe_type_t fe_type, uint16_t service_id, struct dvb_frontend_parameters *out)
+get_tune_params(fe_type_t fe_type, uint16_t service_id, struct dvb_frontend_parameters *out, char *pol, unsigned int *sat_no)
{
if(_channels == NULL)
{
@@ -253,10 +269,12 @@
verbose("Searching channels.conf for service_id %u", service_id);
+ rewind(_channels);
+
if(fe_type == FE_OFDM)
return get_dvbt_tune_params(service_id, out);
else if(fe_type == FE_QPSK)
- return get_dvbs_tune_params(service_id, out);
+ return get_dvbs_tune_params(service_id, out, pol, sat_no);
else if(fe_type == FE_QAM)
return get_dvbc_tune_params(service_id, out);
else if(fe_type == FE_ATSC)
@@ -267,6 +285,13 @@
return false;
}
+/*
+ * DVB-T channels.conf format is:
+ * name:freq:inversion:bandwidth:code_rate_HP:code_rate_LP:constellation:transmission_mode:guard_interval:hierarchy:vpid:apid:service_id
+ * eg:
+ * BBC ONE:722166670:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:600:601:4165
+ */
+
static bool
get_dvbt_tune_params(uint16_t service_id, struct dvb_frontend_parameters *out)
{
@@ -283,7 +308,6 @@
unsigned int id;
int len;
- rewind(_channels);
while(!feof(_channels))
{
if(fgets(line, sizeof(line), _channels) == NULL
@@ -310,11 +334,41 @@
return false;
}
+/*
+ * DVB-S channels.conf format is:
+ * name:freq:polarity:sat_number:symbol_rate:vpid:apid:service_id
+ * eg:
+ * Cartoon Network:10949:v:0:27500:6601:6611:7457
+ */
+
static bool
-get_dvbs_tune_params(uint16_t service_id, struct dvb_frontend_parameters *out)
+get_dvbs_tune_params(uint16_t service_id, struct dvb_frontend_parameters *out, char *pol, unsigned int *sat_no)
{
-printf("TODO: tune DVB-S card to service_id %u\n", service_id);
-return false;
+ char line[1024];
+ unsigned int freq;
+ unsigned int sr;
+ unsigned int id;
+ int len;
+
+ while(!feof(_channels))
+ {
+ if(fgets(line, sizeof(line), _channels) == NULL
+ || sscanf(line, "%*[^:]:%u:%1[^:]:%u:%u:%*[^:]:%*[^:]:%u", &freq, pol, sat_no, &sr, &id) != 5
+ || id != service_id)
+ continue;
+ /* chop off trailing \n */
+ len = strlen(line) - 1;
+ while(len >= 0 && line[len] == '\n')
+ line[len--] = '\0';
+ verbose("%s", line);
+ out->frequency = freq * 1000;
+ out->inversion = INVERSION_AUTO;
+ out->u.qpsk.symbol_rate = sr;
+ out->u.qpsk.fec_inner = FEC_AUTO;
+ return true;
+ }
+
+ return false;
}
static bool
@@ -331,7 +385,54 @@
return false;
}
+/* DISEQC code from dvbtune, written by Dave Chapman */
+
/*
+ * digital satellite equipment control,
+ * specification is available from http://www.eutelsat.com/
+ */
+
+static int
+do_diseqc(int secfd, int sat_no, char pol, bool hi_lo)
+{
+ bool polv = (toupper(pol) == 'V');
+ struct diseqc_cmd cmd = { {{0xe0, 0x10, 0x38, 0xf0, 0x00, 0x00}, 4}, 0 };
+
+ /*
+ * param: high nibble: reset bits, low nibble set bits,
+ * bits are: option, position, polarizaion, band
+ */
+ cmd.cmd.msg[3] = 0xf0 | (((sat_no * 4) & 0x0f) | (hi_lo ? 1 : 0) | (polv ? 0 : 2));
+
+ return diseqc_send_msg( secfd,
+ polv ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18,
+ &cmd,
+ hi_lo ? SEC_TONE_ON : SEC_TONE_OFF,
+ (sat_no / 4) % 2 ? SEC_MINI_B : SEC_MINI_A);
+}
+
+static int
+diseqc_send_msg(int fd, fe_sec_voltage_t v, struct diseqc_cmd *cmd, fe_sec_tone_mode_t t, fe_sec_mini_cmd_t b)
+{
+ if(ioctl(fd, FE_SET_TONE, SEC_TONE_OFF) < 0)
+ return -1;
+ if(ioctl(fd, FE_SET_VOLTAGE, v) < 0)
+ return -1;
+ usleep(15 * 1000);
+ if(ioctl(fd, FE_DISEQC_SEND_MASTER_CMD, &cmd->cmd) < 0)
+ return -1;
+ usleep(cmd->wait * 1000);
+ usleep(15 * 1000);
+ if(ioctl(fd, FE_DISEQC_SEND_BURST, b) < 0)
+ return -1;
+ usleep(15 * 1000);
+ if(ioctl(fd, FE_SET_TONE, t) < 0)
+ return -1;
+
+ return 0;
+}
+
+/*
* retune to the frequency the given service_id is on
*/
@@ -343,6 +444,9 @@
struct dvb_frontend_info fe_info;
struct dvb_frontend_parameters current_params;
struct dvb_frontend_parameters needed_params;
+ char polarity;
+ unsigned int sat_no;
+ bool hi_lo;
struct dvb_frontend_event event;
fe_status_t status;
bool lock;
@@ -381,7 +485,7 @@
fatal("ioctl FE_GET_FRONTEND: %s", strerror(errno));
/* find the tuning params for the service */
- if(!get_tune_params(fe_info.type, service_id, &needed_params))
+ if(!get_tune_params(fe_info.type, service_id, &needed_params, &polarity, &sat_no))
{
error("service_id %u not found in channels.conf file", service_id);
return false;
@@ -407,6 +511,21 @@
/* empty event queue */
while(ioctl(fe_fd, FE_GET_EVENT, &event) >= 0)
; /* do nothing */
+ /* do DISEQC (whatever that is) for DVB-S */
+ if(fe_info.type == FE_QPSK)
+ {
+ if(needed_params.frequency < SLOF)
+ {
+ needed_params.frequency -= LOF1;
+ hi_lo = false;
+ }
+ else
+ {
+ needed_params.frequency -= LOF2;
+ hi_lo = true;
+ }
+ do_diseqc(fe_fd, sat_no, polarity, hi_lo);
+ }
/* tune in */
if(ioctl(fe_fd, FE_SET_FRONTEND, &needed_params) < 0)
fatal("Unable to retune: ioctl FE_SET_FRONTEND: %s", strerror(errno));
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