[mythtv-users] How to add sleep to firewire channel changing script
Charles Wright
cpwright at gmail.com
Tue Dec 29 15:25:19 UTC 2009
You can wrap it in a shell script with like:
#!/bin/sh
sa3520 $*
RET=$?
sleep 5
return $RET
Or at the end of the C program add
sleep(5);
before the call to exit(0);
Charles
On Tue, Dec 29, 2009 at 10:10 AM, Eric N <sheed03 at gmail.com> wrote:
> 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
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>
More information about the mythtv-users
mailing list