From 8b18e63bfef842cf2eac788619f129ba75a2b37b Mon Sep 17 00:00:00 2001 From: Ben Pfaff Date: Sat, 12 Dec 2009 10:44:33 -0800 Subject: [PATCH] fmtools version 0.2.4. --- COPYING | 339 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Changes | 22 +++++ Makefile | 19 ++++ README | 130 ++++++++++++++++++++++++ fm.c | 213 +++++++++++++++++++++++++++++++++++++++ fmscan.c | 129 ++++++++++++++++++++++++ 6 files changed, 852 insertions(+) create mode 100644 COPYING create mode 100644 Changes create mode 100644 Makefile create mode 100644 README create mode 100644 fm.c create mode 100644 fmscan.c diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..a43ea21 --- /dev/null +++ b/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 675 Mass Ave, Cambridge, MA 02139, USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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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., 675 Mass Ave, Cambridge, MA 02139, USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) 19yy name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Changes b/Changes new file mode 100644 index 0000000..668486d --- /dev/null +++ b/Changes @@ -0,0 +1,22 @@ +Wed Feb 3 13:13:01 MST 1999 + - fmtools 0.2.4 released + - 'devices' target added to Makefile + - documentation updated for fmscan and /dev/radio0 + - programs now use /dev/radio0 instead of old(er) /dev/radio + - fmscan added + - small code cleanups + - -o added to oneliner usage display + +Sat Jan 16 23:55:15 MST 1999 + - fmtools 0.2.3 released + - -o (override frequency range checks) introduced after some l-k discussion + +Sun Jan 10 22:17:07 MST 1999 + - fmtools 0.2.2 released + - overflows and negative values during volume changes fixed + - exit codes are now sane + - the division should now accurately reflect 100% volume + +Thu Jul 30 08:39:50 MDT 1998 + - We now support fine tuning on cards that fly the VIDEO_TUNER_LOW flag. + Thanks to Ben Pfaff for this addition. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..9631b81 --- /dev/null +++ b/Makefile @@ -0,0 +1,19 @@ +# fmtools Makefile - just the basics for now + +CC = gcc +CFLAGS = -g -Wall + +all : fm fmscan + +fm : fm.c + $(CC) $(CFLAGS) -o fm fm.c -lm + +fmscan : fmscan.c + $(CC) $(CFLAGS) -o fmscan fmscan.c -lm + +clean : + rm -f *~ *.o fm fmscan + +devices : + mknod /dev/radio0 c 81 64 + ln -s /dev/radio0 /dev/radio diff --git a/README b/README new file mode 100644 index 0000000..39fc67d --- /dev/null +++ b/README @@ -0,0 +1,130 @@ +* fmtools information +* +* Russell Kroll +* +* Program support page: http://www.exploits.org/v4l/fmtools.html +* +* Released under the GNU GPL - See COPYING for details. + +Package information +=================== + +This is intended to become a collection of interesting programs that +control the v4l radio card drivers. Right now, this "collection" is +merely a pair of hopefully interesting utilities: + + fm - a simple tuner + fmscan - a simple band scanner + +fm +== + +This is a very simple controller that will send commands to tuner 0 of the +first v4l radio card on the system. It was written mostly so I could have +something to send commands at the drivers being created or debugged here. + +I'll discuss the options a little, but it should be fairly simple to run. + +The usual mode of operation is to tell the radio to come on to a given +freqency. In these examples, 94.3 will be used since that's a station +that happens to get tuned here frequently. + +To turn the radio on to that frequency at the default volume, you'd do +"fm 94.3" and call it done. If you wanted to crank it up to full volume, +another argument would be needed and the command becomes "fm 94.3 65535". +Volumes range from 0 (off) to 65535 (full intensity). This is a direct +link to the value used in the v4l API by the actual drivers. + +There is a -q option that will suppress messages about tuning, volume +changes, and so forth. Keeping your tuner quiet may not seem like such +a useful thing at first, but it can be very handy inside an IRC script. +Having a program scribble over your channel window when you do /KILO +or similar is not enjoyable. + +Besides direct tuning, there are also "on" and "off" commands. They will +turn the card on and off (mute) as you may have guessed. + +Finally, there is volume control. To go up a notch, use +. To go down +a notch, use -. Simple. + +fm configuration +---------------- + +You can create a file called .fmrc in your home directory that contains +values for the default volume and default volume stepping. This way, +you can have your radio card always come on at a certain volume when you +don't explicitly list it on the command line. The volume stepping +controls how much the volume changes during a - or + operation. + +This file is not required for operation of the program, and it will not +even give so much as a peep if it doesn't find it. The defaults are +used when you don't specify values. The values are 12.5% for default +volume and 10% for default volume stepping. + +Here's what a real .fmrc might look like ... + +VOL 32000 +INCR 6554 + +Here we say the default volume is 32000 - just shy of 50%. Then we +say the increment value for volume changes with + and - is 6554 - +approximately 10%. These values were obtained by playing around with +the numbers until things behaved the way I wanted. + +fmscan +====== + +This simple little program will command your radio card through the radio +band and show which ones have a accumulated signal strength of 50% or +higher. This process can take awhile, and can vary greatly depending on +the radio card in use. + +By default, the range scanned is 87.9-107.9 MHz in .2 MHz steps, since +that's the standard band here in the USA. Users in other regions should +set the appropriate information for best results. + +This program didn't work at all with the radio-aimslab driver until I got +around to adding fine tuning support. If you have one of these cards and +it seems to report 0% for all stations, make sure you have patched your +driver. + +Also, the radio-aztech driver doesn't seem to do anything useful with +this. This is particularly disturbing, since that card supposedly has +both a signal meter and a stereo detector. The 0.50 patch to add fine +tuning hasn't helped. + +v4l /dev entries +================ + +This program uses /dev/radio0. If you have been using v4l radio cards +for awhile, you may already have a /dev/radio. That is now "legacy", and +should be symlinked to /dev/radio0. To create the proper device entry, +either do "make devices" as root, or create it by hand with mknod (c 81 64). + +The proper device listing looks something like this in 'ls -la' ... + +lrwxrwxrwx 1 root root 11 Jan 20 03:19 /dev/radio -> /dev/radio0 +crw-r--r-- 1 root root 81, 64 Jan 20 03:19 /dev/radio0 + +The owner and permission data should be set to values that agree with +your system's personality. If it's mostly a solitary system with few or +no users, the above settings will be fine. + +However, if you have other people running around on your system, consider +making the device part of a "radio" group or maybe even "console" if you +use such a thing. That will keep random individuals from doing odd things +to your radio like changing it to a classical station while you're +listening to some death metal (or vice versa). You have been warned. + +Old interim Linux 2.1 /dev/radio interface +========================================== + +Around 2.1.60, there was another /dev/radio specification that controlled +two boards - namely the AIMSLab RadioTrack and later the Aztech/Packard +Bell radio card. This didn't last very long, as the entire radio card +driver tree was eventually redone under the expanded Video for Linux API. + +These programs are not compatible with that interface. Very few things +are. If you are still using it, you should throw it away and upgrade to +the V4L drivers. There have been many improvements since then, and you +will be able to use the fmtools programs on your card. diff --git a/fm.c b/fm.c new file mode 100644 index 0000000..44549c5 --- /dev/null +++ b/fm.c @@ -0,0 +1,213 @@ +/* fm.c - simple v4l compatible tuner for radio cards + + Copyright (C) 1998 Russell Kroll + + 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* please don't report me to the committee to abolish global variables ... + + they've been removed! */ + +void help(char *prog) +{ + printf ("usage: %s [-h] [-o] [-q] |on|off []\n", prog); + printf ("\n"); + printf ("-h - display this help\n"); + printf ("-o - override frequency range limits in card\n"); + printf ("-q - quiet mode\n"); + printf (" - frequency in MHz (i.e. 94.3)\n"); + printf ("on - turn radio on\n"); + printf ("off - turn radio off (mute)\n"); + printf ("+ - increase volume\n"); + printf ("- - decrease volume\n"); + printf (" - intensity (0-65535)\n"); + + exit (1); +} + +void getconfig(int *defaultvol, int *increment) +{ + FILE *conf; + char buf[256], fn[256]; + + sprintf (fn, "%s/.fmrc", getenv("HOME")); + conf = fopen (fn, "r"); + + if (!conf) + return; + + while (fgets(buf, sizeof(buf), conf)) { + buf[strlen(buf)-1] = 0; + if (strncmp (buf, "VOL", 3) == 0) + sscanf (buf, "%*s %i", defaultvol); + if (strncmp (buf, "INCR", 3) == 0) + sscanf (buf, "%*s %i", increment); + } + + fclose (conf); + + return; +} + +int main(int argc, char **argv) +{ + int fd, ret, tunevol, quiet=0, i, override = 0; + int defaultvol = 8192; /* default volume = 12.5% */ + int increment = 6554; /* default change = 10% */ + double fact; + unsigned long freq; + struct video_audio va; + struct video_tuner vt; + char *progname; + extern char *optarg; + extern int optind, opterr, optopt; + + if ((argc < 2) || (argc > 4)) { + printf ("usage: %s [-h] [-o] [-q] |on|off []\n", argv[0]); + exit (1); + } + + progname = argv[0]; /* used after getopt munges argv[] */ + + fd = open ("/dev/radio0", O_RDONLY); + if (fd == -1) { + perror ("Unable to open /dev/radio0"); + exit (1); + } + + getconfig(&defaultvol, &increment); + + while ((i = getopt(argc, argv, "+qho")) != EOF) { + switch (i) { + case 'q': + quiet = 1; + break; + case 'o': + override = 1; + case 'h': + default: + help(argv[0]); + break; + } + } + + argc -= optind; + argv += optind; + + if (argc == 2) + tunevol = atoi (argv[1]); + else + tunevol = defaultvol; + + if (argc == 0) /* no frequency, on|off, or +|- given */ + help (progname); + + if (!strcmp("off", argv[0])) { /* mute the radio */ + va.audio = 0; + va.volume = 0; + va.flags = VIDEO_AUDIO_MUTE; + ret = ioctl (fd, VIDIOCSAUDIO, &va); + if (!quiet) + printf ("Radio muted\n"); + exit (0); + } + + if (!strcmp("on", argv[0])) { /* turn radio on */ + va.audio = 0; + va.volume = tunevol; + va.flags = 0; + ret = ioctl (fd, VIDIOCSAUDIO, &va); + if (!quiet) + printf ("Radio on at %2.2f%% volume\n", + (tunevol / 655.36)); + exit (0); + } + + ret = ioctl (fd, VIDIOCGAUDIO, &va); + + if (argv[0][0] == '+') { /* volume up */ + if ((va.volume + increment) > 65535) + va.volume = 65535; /* catch overflows in __u16 */ + else + va.volume += increment; + + if (!quiet) + printf ("Setting volume to %2.2f%%\n", + (va.volume / 655.35)); + ret = ioctl (fd, VIDIOCSAUDIO, &va); + exit (0); + } + + if (argv[0][0] == '-') { /* volume down */ + if ((va.volume - increment) < 0) + va.volume = 0; /* catch negative numbers */ + else + va.volume -= increment; + + if (!quiet) + printf ("Setting volume to %2.2f%%\n", + (va.volume / 655.35)); + ret = ioctl (fd, VIDIOCSAUDIO, &va); + exit (0); + } + + /* at this point, we are trying to tune to a frequency */ + + vt.tuner = 0; + ret = ioctl(fd, VIDIOCGTUNER, &vt); /* get frequency range */ + + if (ret == -1 || (vt.flags & VIDEO_TUNER_LOW) == 0) + fact = 16.; + else + fact = 16000.; + freq = ceil(atof(argv[0]) * fact); /* rounding up matters */ + + if ((freq < vt.rangelow) || (freq > vt.rangehigh)) { + if (override == 0) { + printf ("Frequency %2.1f out of range (%2.1f - %2.1f MHz)\n", + (freq / fact), (vt.rangelow / fact), + (vt.rangehigh / fact)); + exit (1); + } + } + + /* frequency sanity checked, proceed */ + ret = ioctl (fd, VIDIOCSFREQ, &freq); + + va.audio = 0; + va.volume = tunevol; + va.flags = 0; + va.mode = VIDEO_SOUND_STEREO; + + ret = ioctl (fd, VIDIOCSAUDIO, &va); /* set the volume */ + + if (!quiet) + printf ("Radio tuned to %2.1f MHz at %2.2f%% volume\n", + (freq / fact), (tunevol / 655.35)); + + return (0); +} diff --git a/fmscan.c b/fmscan.c new file mode 100644 index 0000000..848aea7 --- /dev/null +++ b/fmscan.c @@ -0,0 +1,129 @@ +/* scan.c - v4l radio band scanner using signal strength + + Copyright (C) 1999 Russell Kroll + + 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +void help (char *prog) +{ + printf ("usage: %s [-h] [-s ] [-e ] [-i ]\n\n", prog); + + printf ("-h - display this help\n"); + printf ("-s - set start of scanning range to \n"); + printf ("-e - set end of scanning range to \n"); + printf ("-i - set increment value between channels to \n"); + printf (" - a value in the format nnn.nn (MHz)\n"); + + exit (1); +} + +int main(int argc, char **argv) +{ + int fd, ret, i, tries = 25; + struct video_tuner vt; + float perc, begval, incval, endval; + long lowf, highf, freq, totsig, incr, fact; + char *progname; + + progname = argv[0]; /* getopt munges argv[] later */ + + fd = open ("/dev/radio0", O_RDONLY); + if (fd == -1) { + perror ("Unable to open /dev/radio0"); + exit (1); + } + + /* USA defaults */ + begval = 87.9; /* start at 87.9 MHz */ + incval = 0.20; /* increment 0.2 MHz */ + endval = 107.9; /* stop at 107.9 MHz */ + + while ((i = getopt(argc, argv, "+e:hi:s:")) != EOF) { + switch (i) { + case 'e': + endval = atof (optarg); + break; + case 'i': + incval = atof (optarg); + break; + case 's': + begval = atof (optarg); + break; + case 'h': + default: + help(progname); + break; + } + } + + vt.tuner = 0; + ret = ioctl(fd, VIDIOCGTUNER, &vt); /* get initial info */ + + if ((vt.flags & VIDEO_TUNER_LOW) == 0) + fact = 16; + else + fact = 16000; + + /* cope with bizarre things from atof() like 95.099998 */ + lowf = fact * (ceil(rint(begval * 10)) / 10); + highf = fact * (ceil(rint(endval * 10)) / 10); + + incr = fact * incval; + + printf ("Scanning range: %2.1f - %2.1f MHz (%2.1f MHz increments)...\n", + begval, endval, incval); + + for (freq = lowf; freq <= highf; freq += incr) { + ioctl (fd, VIDIOCSFREQ, &freq); /* tune */ + + printf ("%2.1f: checking\r", (freq / (double) fact)); + + fflush (stdout); + usleep (400000); /* let it lock on */ + + totsig = 0; + for (i = 0; i < tries; i++) { + vt.tuner = 0; + ret = ioctl(fd, VIDIOCGTUNER, &vt); /* get info */ + totsig += vt.signal; + fflush(stdout); + usleep (15000); + } + + /* clean up the display */ + printf (" \r"); + + perc = (totsig / (65535.0 * tries)); + + if (perc > .5) + printf ("%2.1f: %3.1f%% \n", + (freq / (double) fact), perc * 100.0); + } + + close (fd); + + return (0); +} -- 2.11.4.GIT