[mythtv-users] How to add sleep to firewire channel changing script
Eric N
sheed03 at gmail.com
Tue Dec 29 15:10:27 UTC 2009
I just set up mythbackend to record with the HD-PVR 1212 from the SA4250HDC
cable box. Thanks to Major Idiot's firewire script posted at
http://ubuntuforums.org/showpost.php?p=4453681&postcount=3 I am able to run
channel changing over firewire without a problem. However I ran into an
issue when I tried to record a program with the HDPVR using the script. The
recording failed due to the cable box not showing the actual channel until a
few seconds after the change and the HD-PVR started to record instantly
after the channel was changed by the script. I've seen a few users suggest
adding a sleep command of say 5 seconds to a channel changing script, and
that is what I would like to do with this script. How do I add sleep to the
following script?
/*
* Samo's SA4250HD firewire channel changer by majoridiot
*
* requires: libavc1394-dev libraw1394-dev
*
* compile with: gcc -o sa4250_ch sa4250_ch.c -lrom1394 -lavc1394 -lraw1394
*
* based on mythtv source code and
*
* sa3250ch - an external channel changer for SA3250HD Tuner
* Based off 6200ch.c by Stacey D. Son
*
* Copyright 2004,2005 by Stacey D. Son <mythdev at son.org>
* Copyright 2005 Matt Porter <mporter at kernel.crashing.org>
* Portions Copyright 2006 Chris Ingrassia <chris at spicecoffee.org> (SA4200
and Single-digit command mode)
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <libavc1394/rom1394.h>
#include <libavc1394/avc1394.h>
#include <libraw1394/raw1394.h>
#include <sys/types.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
/* SA42xxHD IDs */
#define SA4200HD_VENDOR_ID1 0x000014f8
#define SA4200HD_MODEL_ID1 0x00001072
#define SA4250HD_VENDOR_ID1 0x00001e6b /* eric's stb */
#define SA4250HD_MODEL_ID1 0x000010cc /* eric's stb */
/* add additional vendor and model id's here- addition needed to if
statement starting @ line 134 below */
#define AVC1394_SA3250_COMMAND_CHANNEL 0x000007c00
#define AVC1394_SA3250_OPERAND_KEY_PRESS 0xe7
#define AVC1394_SA3250_OPERAND_KEY_RELEASE 0x67
#define CTL_CMD0 AVC1394_CTYPE_CONTROL | AVC1394_SUBUNIT_TYPE_PANEL | \
AVC1394_SUBUNIT_ID_0 | AVC1394_SA3250_COMMAND_CHANNEL
#define CTL_CMD1 (0x04 << 24)
#define CTL_CMD2 0xff000000
/* I changed this from 0 to 1 because cable box is connected on node 1 */
#define STARTING_NODE 1
void usage()
{
fprintf(stderr, "Usage: sa_ch [-v] <channel_num>\n");
fprintf(stderr, " -v : Verbose Mode\n");
exit(1);
}
int main (int argc, char *argv[])
{
rom1394_directory dir;
int device = -1;
int single = 0;
int i;
int verbose = 0;
int dig[3];
int chn = 708;
if (argc < 2)
usage();
for(i = 1; i < argc; ++i) {
if ((argv[i][0] == '-') && (strlen(argv[i]) > 1)) {
switch(argv[i][1]) {
case 'v':
verbose = 1;
break;
default:
fprintf(stderr, "WARNING: Unknown option \'%c\', ignoring",
argv[i][1]);
}
}
else {
chn = atoi(argv[i]);
}
}
#ifdef RAW1394_V_0_8
raw1394handle_t handle = raw1394_get_handle();
#else
raw1394handle_t handle = raw1394_new_handle();
#endif
if (!handle) {
if (!errno) {
fprintf(stderr, "Not Compatible!\n");
} else {
perror("Couldn't get 1394 handle");
fprintf(stderr, "Is ieee1394, driver, and raw1394 loaded? Are
/dev/raw1394 permissions set correctly?\n");
}
exit(1);
}
if (raw1394_set_port(handle, 0) < 0) {
perror("ERROR-- could not set port");
raw1394_destroy_handle(handle);
exit(1);
}
int nc = raw1394_get_nodecount(handle);
for (i=STARTING_NODE; i < nc; ++i) {
if (rom1394_get_directory(handle, i, &dir) < 0) {
fprintf(stderr,"ERROR reading config rom directory for node %d\n",
i);
raw1394_destroy_handle(handle);
exit(1);
}
if (verbose)
printf("node %d: vendor_id = 0x%08x model_id = 0x%08x\n",
i, dir.vendor_id, dir.model_id);
/* add new vendor and model ids to if stanza below */
if ( ((dir.vendor_id == SA4250HD_VENDOR_ID1) &&
(dir.model_id == SA4250HD_MODEL_ID1)) ||
((dir.vendor_id == SA4200HD_VENDOR_ID1) &&
(dir.model_id == SA4200HD_MODEL_ID1))) {
device = i;
break;
}
}
if (device == -1) {
fprintf(stderr, "Could not find SA42XXHD on the 1394 bus!\n");
fprintf(stderr, "Try running again with -v and check source code for
matching Vendor ID and Model ID-\n");
fprintf(stderr, "Add if necessary and recompile.\n");
raw1394_destroy_handle(handle);
exit(1);
}
if (verbose)
printf("Device acquired on node %d\n", device);
printf("Changing channel %d\n", chn);
quadlet_t cmd[3] =
{
CTL_CMD0 | AVC1394_SA3250_OPERAND_KEY_PRESS,
CTL_CMD1 | (chn << 8),
CTL_CMD2,
};
if (verbose)
printf("AV/C Command: cmd0=0x%08x cmd1=0x%08x cmd2=0x%08x\n",
cmd[0], cmd[1], cmd[2]);
avc1394_transaction_block(handle, device, cmd, 3, 1);
quadlet_t cmd2[3] =
{
CTL_CMD0 | AVC1394_SA3250_OPERAND_KEY_RELEASE,
CTL_CMD1 | (chn << 8),
CTL_CMD2,
};
if (verbose)
printf("AV/C Command: cmd0=0x%08x cmd1=0x%08x cmd2=0x%08x\n",
cmd2[0], cmd2[1], cmd2[2]);
avc1394_transaction_block(handle, device, cmd2, 3, 1);
raw1394_destroy_handle(handle);
exit(0);
}
--
Eric
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