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/*
* Monitor a DAHDI Channel
*
* Written by Mark Spencer <markster@digium.com>
* Based on previous works, designs, and architectures conceived and
* written by Jim Dixon <jim@lambdatel.com>.
*
* Copyright (C) 2001 Jim Dixon / Zapata Telephony.
* Copyright (C) 2001-2008 Digium, Inc.
*
* All rights reserved.
*
*/
/*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2 as published by the
* Free Software Foundation. See the LICENSE file included with
* this program for more details.
*/
#include <stdio.h>
#include <getopt.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <signal.h>
#include <dahdi/user.h>
#include "dahdi_tools_version.h"
#include "wavformat.h"
#include "autoconfig.h"
#ifdef HAVE_SYS_SOUNDCARD_H
# include <sys/soundcard.h>
#else
# ifdef HAVE_LINUX_SOUNDCARD_H
# include <linux/soundcard.h>
# else
# error "Your installation appears to be missing soundcard.h which is needed to continue."
# endif
#endif
/*
* defines for file handle numbers
*/
#define MON_BRX 0 /*!< both channels if multichannel==1 or receive otherwise */
#define MON_TX 1 /*!< transmit channel */
#define MON_PRE_BRX 2 /*!< same as MON_BRX but before echo cancellation */
#define MON_PRE_TX 3 /*!< same as MON_TX but before echo cancellation */
#define MON_STEREO 4 /*!< stereo mix of rx/tx streams */
#define MON_PRE_STEREO 5 /*!< stereo mix of rx/tx before echo can. This is exactly what is fed into the echo can */
#define BLOCK_SIZE 240
#define BUFFERS 4
#define FRAG_SIZE 8
#define MAX_OFH 6
/* Put the ofh (output file handles) outside the main loop in case we ever add a
* signal handler.
*/
static FILE *ofh[MAX_OFH];
static int run = 1;
static int stereo;
static int verbose;
/* handler to catch ctrl-c */
void cleanup_and_exit(int signal)
{
fprintf(stderr, "cntrl-c pressed\n");
run = 0; /* stop reading */
}
int filename_is_wav(char *filename)
{
if (NULL != strstr(filename, ".wav"))
return 1;
return 0;
}
/*
* Fill the wav header with default info
* num_chans - 0 = mono; 1 = stereo
*/
void wavheader_init(struct wavheader *wavheader, int num_chans)
{
memset(wavheader, 0, sizeof(struct wavheader));
memcpy(&wavheader->riff_chunk_id, "RIFF", 4);
memcpy(&wavheader->riff_type, "WAVE", 4);
memcpy(&wavheader->fmt_chunk_id, "fmt ", 4);
wavheader->fmt_data_size = 16;
wavheader->fmt_compression_code = 1;
wavheader->fmt_num_channels = num_chans;
wavheader->fmt_sample_rate = 8000;
wavheader->fmt_avg_bytes_per_sec = 16000;
wavheader->fmt_block_align = 2;
wavheader->fmt_significant_bps = 16;
memcpy(&wavheader->data_chunk_id, "data", 4);
}
int audio_open(void)
{
int fd;
int speed = 8000;
int fmt = AFMT_S16_LE;
int fragsize = (BUFFERS << 16) | (FRAG_SIZE);
struct audio_buf_info ispace, ospace;
fd = open("/dev/dsp", O_WRONLY);
if (fd < 0) {
fprintf(stderr, "Unable to open /dev/dsp: %s\n", strerror(errno));
return -1;
}
/* Step 1: Signed linear */
if (ioctl(fd, SNDCTL_DSP_SETFMT, &fmt) < 0) {
fprintf(stderr, "ioctl(SETFMT) failed: %s\n", strerror(errno));
close(fd);
return -1;
}
/* Step 2: Make non-stereo */
if (ioctl(fd, SNDCTL_DSP_STEREO, &stereo) < 0) {
fprintf(stderr, "ioctl(STEREO) failed: %s\n", strerror(errno));
close(fd);
return -1;
}
if (stereo != 0) {
fprintf(stderr, "Can't turn stereo off :(\n");
}
/* Step 3: Make 8000 Hz */
if (ioctl(fd, SNDCTL_DSP_SPEED, &speed) < 0) {
fprintf(stderr, "ioctl(SPEED) failed: %s\n", strerror(errno));
close(fd);
return -1;
}
if (speed != 8000) {
fprintf(stderr, "Warning: Requested 8000 Hz, got %d\n", speed);
}
if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &fragsize)) {
fprintf(stderr, "Sound card won't let me set fragment size to %u %u-byte buffers (%x)\n"
"so sound may be choppy: %s.\n", BUFFERS, (1 << FRAG_SIZE), fragsize, strerror(errno));
}
bzero(&ispace, sizeof(ispace));
bzero(&ospace, sizeof(ospace));
if (ioctl(fd, SNDCTL_DSP_GETISPACE, &ispace)) {
/* They don't support block size stuff, so just return but notify the user */
fprintf(stderr, "Sound card won't let me know the input buffering...\n");
}
if (ioctl(fd, SNDCTL_DSP_GETOSPACE, &ospace)) {
/* They don't support block size stuff, so just return but notify the user */
fprintf(stderr, "Sound card won't let me know the output buffering...\n");
}
fprintf(stderr, "New input space: %d of %d %d byte fragments (%d bytes left)\n",
ispace.fragments, ispace.fragstotal, ispace.fragsize, ispace.bytes);
fprintf(stderr, "New output space: %d of %d %d byte fragments (%d bytes left)\n",
ospace.fragments, ospace.fragstotal, ospace.fragsize, ospace.bytes);
return fd;
}
int pseudo_open(void)
{
int fd;
int x = 1;
fd = open("/dev/dahdi/pseudo", O_RDWR);
if (fd < 0) {
fprintf(stderr, "Unable to open pseudo channel: %s\n", strerror(errno));
return -1;
}
if (ioctl(fd, DAHDI_SETLINEAR, &x)) {
fprintf(stderr, "Unable to set linear mode: %s\n", strerror(errno));
close(fd);
return -1;
}
x = BLOCK_SIZE;
if (ioctl(fd, DAHDI_SET_BLOCKSIZE, &x)) {
fprintf(stderr, "unable to set sane block size: %s\n", strerror(errno));
close(fd);
return -1;
}
return fd;
}
#define barlen 35
#define baroptimal 3250
//define barlevel 200
#define barlevel ((baroptimal/barlen)*2)
#define maxlevel (barlen*barlevel)
void draw_barheader()
{
char bar[barlen + 4];
memset(bar, '-', sizeof(bar));
memset(bar, '<', 1);
memset(bar + barlen + 2, '>', 1);
memset(bar + barlen + 3, '\0', 1);
memcpy(bar + (barlen / 2), "(RX)", 4);
printf("%s", bar);
memcpy(bar + (barlen / 2), "(TX)", 4);
printf(" %s\n", bar);
}
void draw_bar(int avg, int max)
{
char bar[barlen+5];
memset(bar, ' ', sizeof(bar));
max /= barlevel;
avg /= barlevel;
if (avg > barlen)
avg = barlen;
if (max > barlen)
max = barlen;
if (avg > 0)
memset(bar, '#', avg);
if (max > 0)
memset(bar + max, '*', 1);
bar[barlen+1] = '\0';
printf("%s", bar);
fflush(stdout);
}
void visualize(short *tx, short *rx, int cnt)
{
int x;
float txavg = 0;
float rxavg = 0;
static int txmax = 0;
static int rxmax = 0;
static int sametxmax = 0;
static int samerxmax = 0;
static int txbest = 0;
static int rxbest = 0;
float ms;
static struct timeval last;
struct timeval tv;
gettimeofday(&tv, NULL);
ms = (tv.tv_sec - last.tv_sec) * 1000.0 + (tv.tv_usec - last.tv_usec) / 1000.0;
for (x = 0; x < cnt; x++) {
txavg += abs(tx[x]);
rxavg += abs(rx[x]);
}
txavg = abs(txavg / cnt);
rxavg = abs(rxavg / cnt);
if (txavg > txbest)
txbest = txavg;
if (rxavg > rxbest)
rxbest = rxavg;
/* Update no more than 10 times a second */
if (ms < 100)
return;
/* Save as max levels, if greater */
if (txbest > txmax) {
txmax = txbest;
sametxmax = 0;
}
if (rxbest > rxmax) {
rxmax = rxbest;
samerxmax = 0;
}
memcpy(&last, &tv, sizeof(last));
/* Clear screen */
printf("\r ");
draw_bar(rxbest, rxmax);
printf(" ");
draw_bar(txbest, txmax);
if (verbose)
printf(" Rx: %5d (%5d) Tx: %5d (%5d)", rxbest, rxmax, txbest, txmax);
txbest = 0;
rxbest = 0;
/* If we have had the same max hits for x times, clear the values */
sametxmax++;
samerxmax++;
if (sametxmax > 6) {
txmax = 0;
sametxmax = 0;
}
if (samerxmax > 6) {
rxmax = 0;
samerxmax = 0;
}
}
int main(int argc, char *argv[])
{
int afd = -1;
int pfd[4] = {-1, -1, -1, -1};
short buf_brx[BLOCK_SIZE * 2];
short buf_tx[BLOCK_SIZE * 4];
short stereobuf[BLOCK_SIZE * 4];
int res_brx, res_tx;
int visual = 0;
int multichannel = 0;
int ossoutput = 0;
int preecho = 0;
int savefile = 0;
int stereo_output = 0;
int limit = 0;
int readcount = 0;
int x, chan;
struct dahdi_confinfo zc;
int opt;
extern char *optarg;
struct wavheader wavheaders[MAX_OFH]; /* we have one for each potential filehandle */
unsigned int bytes_written[MAX_OFH] = {0};
int file_is_wav[MAX_OFH] = {0};
int i;
if ((argc < 2) || (atoi(argv[1]) < 1)) {
fprintf(stderr, "Usage: dahdi_monitor <channel num> [-v[v]] [-m] [-o] [-l limit] [-f FILE | -s FILE | -r FILE1 -t FILE2] [-F FILE | -S FILE | -R FILE1 -T FILE2]\n");
fprintf(stderr, "Options:\n");
fprintf(stderr, " -v: Visual mode. Implies -m.\n");
fprintf(stderr, " -vv: Visual/Verbose mode. Implies -m.\n");
fprintf(stderr, " -l LIMIT: Stop after reading LIMIT bytes\n");
fprintf(stderr, " -m: Separate rx/tx streams.\n");
fprintf(stderr, " -o: Output audio via OSS. Note: Only 'normal' combined rx/tx streams are output via OSS.\n");
fprintf(stderr, " -f FILE: Save combined rx/tx stream to mono FILE. Cannot be used with -m.\n");
fprintf(stderr, " -r FILE: Save rx stream to FILE. Implies -m.\n");
fprintf(stderr, " -t FILE: Save tx stream to FILE. Implies -m.\n");
fprintf(stderr, " -s FILE: Save stereo rx/tx stream to FILE. Implies -m.\n");
fprintf(stderr, " -F FILE: Save combined pre-echocanceled rx/tx stream to FILE. Cannot be used with -m.\n");
fprintf(stderr, " -R FILE: Save pre-echocanceled rx stream to FILE. Implies -m.\n");
fprintf(stderr, " -T FILE: Save pre-echocanceled tx stream to FILE. Implies -m.\n");
fprintf(stderr, " -S FILE: Save pre-echocanceled stereo rx/tx stream to FILE. Implies -m.\n");
fprintf(stderr, "Examples:\n");
fprintf(stderr, "Save a stream to a file\n");
fprintf(stderr, " dahdi_monitor 1 -f stream.raw\n");
fprintf(stderr, "Visualize an rx/tx stream and save them to separate files.\n");
fprintf(stderr, " dahdi_monitor 1 -v -r streamrx.raw -t streamtx.raw\n");
fprintf(stderr, "Play a combined rx/tx stream via OSS and save it to a file\n");
fprintf(stderr, " dahdi_monitor 1 -o -f stream.raw\n");
fprintf(stderr, "Save a combined normal rx/tx stream and a combined 'preecho' rx/tx stream to files\n");
fprintf(stderr, " dahdi_monitor 1 -f stream.raw -F streampreecho.raw\n");
fprintf(stderr, "Save a normal rx/tx stream and a 'preecho' rx/tx stream to separate files\n");
fprintf(stderr, " dahdi_monitor 1 -m -r streamrx.raw -t streamtx.raw -R streampreechorx.raw -T streampreechotx.raw\n");
exit(1);
}
chan = atoi(argv[1]);
while ((opt = getopt(argc, argv, "vmol:f:r:t:s:F:R:T:S:")) != -1) {
switch (opt) {
case '?':
exit(EXIT_FAILURE);
case 'v':
if (visual)
verbose = 1;
visual = 1;
multichannel = 1;
break;
case 'm':
multichannel = 1;
break;
case 'o':
ossoutput = 1;
break;
case 'l':
if (sscanf(optarg, "%d", &limit) != 1 || limit < 0)
limit = 0;
fprintf(stderr, "Will stop reading after %d bytes\n", limit);
break;
case 'f':
if (multichannel) {
fprintf(stderr, "'%c' mode cannot be used when multichannel mode is enabled.\n", opt);
exit(EXIT_FAILURE);
}
if (ofh[MON_BRX]) {
fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
exit(EXIT_FAILURE);
}
if ((ofh[MON_BRX] = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
fprintf(stderr, "Writing combined stream to %s\n", optarg);
file_is_wav[MON_BRX] = filename_is_wav(optarg);
if (file_is_wav[MON_BRX]) {
wavheader_init(&wavheaders[MON_BRX], 1);
if (fwrite(&wavheaders[MON_BRX], 1, sizeof(struct wavheader), ofh[MON_BRX]) != sizeof(struct wavheader)) {
fprintf(stderr, "Could not write wav header to %s: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
}
savefile = 1;
break;
case 'F':
if (multichannel) {
fprintf(stderr, "'%c' mode cannot be used when multichannel mode is enabled.\n", opt);
exit(EXIT_FAILURE);
}
if (ofh[MON_PRE_BRX]) {
fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
exit(EXIT_FAILURE);
}
if ((ofh[MON_PRE_BRX] = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
fprintf(stderr, "Writing pre-echo combined stream to %s\n", optarg);
file_is_wav[MON_PRE_BRX] = filename_is_wav(optarg);
if (file_is_wav[MON_PRE_BRX]) {
wavheader_init(&wavheaders[MON_PRE_BRX], 1);
if (fwrite(&wavheaders[MON_PRE_BRX], 1, sizeof(struct wavheader), ofh[MON_PRE_BRX]) != sizeof(struct wavheader)) {
fprintf(stderr, "Could not write wav header to %s: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
}
preecho = 1;
savefile = 1;
break;
case 'r':
if (!multichannel && ofh[MON_BRX]) {
fprintf(stderr, "'%c' mode cannot be used when combined mode is enabled.\n", opt);
exit(EXIT_FAILURE);
}
if (ofh[MON_BRX]) {
fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
exit(EXIT_FAILURE);
}
if ((ofh[MON_BRX] = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
fprintf(stderr, "Writing receive stream to %s\n", optarg);
file_is_wav[MON_BRX] = filename_is_wav(optarg);
if (file_is_wav[MON_BRX]) {
wavheader_init(&wavheaders[MON_BRX], 1);
if (fwrite(&wavheaders[MON_BRX], 1, sizeof(struct wavheader), ofh[MON_BRX]) != sizeof(struct wavheader)) {
fprintf(stderr, "Could not write wav header to %s: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
}
multichannel = 1;
savefile = 1;
break;
case 'R':
if (!multichannel && ofh[MON_PRE_BRX]) {
fprintf(stderr, "'%c' mode cannot be used when combined mode is enabled.\n", opt);
exit(EXIT_FAILURE);
}
if (ofh[MON_PRE_BRX]) {
fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
exit(EXIT_FAILURE);
}
if ((ofh[MON_PRE_BRX] = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
fprintf(stderr, "Writing pre-echo receive stream to %s\n", optarg);
file_is_wav[MON_PRE_BRX] = filename_is_wav(optarg);
if (file_is_wav[MON_PRE_BRX]) {
wavheader_init(&wavheaders[MON_PRE_BRX], 1);
if (fwrite(&wavheaders[MON_PRE_BRX], 1, sizeof(struct wavheader), ofh[MON_PRE_BRX]) != sizeof(struct wavheader)) {
fprintf(stderr, "Could not write wav header to %s: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
}
preecho = 1;
multichannel = 1;
savefile = 1;
break;
case 't':
if (!multichannel && ofh[MON_BRX]) {
fprintf(stderr, "'%c' mode cannot be used when combined mode is enabled.\n", opt);
exit(EXIT_FAILURE);
}
if (ofh[MON_TX]) {
fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
exit(EXIT_FAILURE);
}
if ((ofh[MON_TX] = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
fprintf(stderr, "Writing transmit stream to %s\n", optarg);
file_is_wav[MON_TX] = filename_is_wav(optarg);
if (file_is_wav[MON_TX]) {
wavheader_init(&wavheaders[MON_TX], 1);
if (fwrite(&wavheaders[MON_TX], 1, sizeof(struct wavheader), ofh[MON_TX]) != sizeof(struct wavheader)) {
fprintf(stderr, "Could not write wav header to %s: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
}
multichannel = 1;
savefile = 1;
break;
case 'T':
if (!multichannel && ofh[MON_PRE_BRX]) {
fprintf(stderr, "'%c' mode cannot be used when combined mode is enabled.\n", opt);
exit(EXIT_FAILURE);
}
if (ofh[MON_PRE_TX]) {
fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
exit(EXIT_FAILURE);
}
if ((ofh[MON_PRE_TX] = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
fprintf(stderr, "Writing pre-echo transmit stream to %s\n", optarg);
file_is_wav[MON_PRE_TX] = filename_is_wav(optarg);
if (file_is_wav[MON_PRE_TX]) {
wavheader_init(&wavheaders[MON_PRE_TX], 1);
if (fwrite(&wavheaders[MON_PRE_TX], 1, sizeof(struct wavheader), ofh[MON_PRE_TX]) != sizeof(struct wavheader)) {
fprintf(stderr, "Could not write wav header to %s: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
}
preecho = 1;
multichannel = 1;
savefile = 1;
break;
case 's':
if (!multichannel && ofh[MON_BRX]) {
fprintf(stderr, "'%c' mode cannot be used when combined mode is enabled.\n", opt);
exit(EXIT_FAILURE);
}
if (ofh[MON_STEREO]) {
fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
exit(EXIT_FAILURE);
}
if ((ofh[MON_STEREO] = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
fprintf(stderr, "Writing stereo stream to %s\n", optarg);
file_is_wav[MON_STEREO] = filename_is_wav(optarg);
if (file_is_wav[MON_STEREO]) {
wavheader_init(&wavheaders[MON_STEREO], 2);
if (fwrite(&wavheaders[MON_STEREO], 1, sizeof(struct wavheader), ofh[MON_STEREO]) != sizeof(struct wavheader)) {
fprintf(stderr, "Could not write wav header to %s: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
}
multichannel = 1;
savefile = 1;
stereo_output = 1;
break;
case 'S':
if (!multichannel && ofh[MON_PRE_BRX]) {
fprintf(stderr, "'%c' mode cannot be used when combined mode is enabled.\n", opt);
exit(EXIT_FAILURE);
}
if (ofh[MON_PRE_STEREO]) {
fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
exit(EXIT_FAILURE);
}
if ((ofh[MON_PRE_STEREO] = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
fprintf(stderr, "Writing pre-echo stereo stream to %s\n", optarg);
file_is_wav[MON_PRE_STEREO] = filename_is_wav(optarg);
if (file_is_wav[MON_PRE_STEREO]) {
wavheader_init(&wavheaders[MON_PRE_STEREO], 2);
if (fwrite(&wavheaders[MON_PRE_STEREO], 1, sizeof(struct wavheader), ofh[MON_PRE_STEREO]) != sizeof(struct wavheader)) {
fprintf(stderr, "Could not write wav header to %s: %s\n", optarg, strerror(errno));
exit(EXIT_FAILURE);
}
}
preecho = 1;
multichannel = 1;
savefile = 1;
stereo_output = 1;
break;
}
}
if (ossoutput) {
if (multichannel) {
printf("Multi-channel audio is enabled. OSS output will be disabled.\n");
ossoutput = 0;
} else {
/* Open audio */
if ((afd = audio_open()) < 0) {
printf("Cannot open audio ...\n");
ossoutput = 0;
}
}
}
if (!ossoutput && !multichannel && !savefile) {
fprintf(stderr, "Nothing to do with the stream(s) ...\n");
exit(1);
}
/* Open Pseudo device */
if ((pfd[MON_BRX] = pseudo_open()) < 0)
exit(1);
if (multichannel && ((pfd[MON_TX] = pseudo_open()) < 0))
exit(1);
if (preecho) {
if ((pfd[MON_PRE_BRX] = pseudo_open()) < 0)
exit(1);
if (multichannel && ((pfd[MON_PRE_TX] = pseudo_open()) < 0))
exit(1);
}
/* Conference them */
if (multichannel) {
memset(&zc, 0, sizeof(zc));
zc.chan = 0;
zc.confno = chan;
/* Two pseudo's, one for tx, one for rx */
zc.confmode = DAHDI_CONF_MONITOR;
if (ioctl(pfd[MON_BRX], DAHDI_SETCONF, &zc) < 0) {
fprintf(stderr, "Unable to monitor: %s\n", strerror(errno));
exit(1);
}
memset(&zc, 0, sizeof(zc));
zc.chan = 0;
zc.confno = chan;
zc.confmode = DAHDI_CONF_MONITORTX;
if (ioctl(pfd[MON_TX], DAHDI_SETCONF, &zc) < 0) {
fprintf(stderr, "Unable to monitor: %s\n", strerror(errno));
exit(1);
}
if (preecho) {
memset(&zc, 0, sizeof(zc));
zc.chan = 0;
zc.confno = chan;
/* Two pseudo's, one for tx, one for rx */
zc.confmode = DAHDI_CONF_MONITOR_RX_PREECHO;
if (ioctl(pfd[MON_PRE_BRX], DAHDI_SETCONF, &zc) < 0) {
fprintf(stderr, "Unable to monitor: %s\n", strerror(errno));
exit(1);
}
memset(&zc, 0, sizeof(zc));
zc.chan = 0;
zc.confno = chan;
zc.confmode = DAHDI_CONF_MONITOR_TX_PREECHO;
if (ioctl(pfd[MON_PRE_TX], DAHDI_SETCONF, &zc) < 0) {
fprintf(stderr, "Unable to monitor: %s\n", strerror(errno));
exit(1);
}
}
} else {
memset(&zc, 0, sizeof(zc));
zc.chan = 0;
zc.confno = chan;
zc.confmode = DAHDI_CONF_MONITORBOTH;
if (ioctl(pfd[MON_BRX], DAHDI_SETCONF, &zc) < 0) {
fprintf(stderr, "Unable to monitor: %s\n", strerror(errno));
exit(1);
}
if (preecho) {
memset(&zc, 0, sizeof(zc));
zc.chan = 0;
zc.confno = chan;
zc.confmode = DAHDI_CONF_MONITORBOTH_PREECHO;
if (ioctl(pfd[MON_PRE_BRX], DAHDI_SETCONF, &zc) < 0) {
fprintf(stderr, "Unable to monitor: %s\n", strerror(errno));
exit(1);
}
}
}
if (signal(SIGINT, cleanup_and_exit) == SIG_ERR) {
fprintf(stderr, "Error registering signal handler: %s\n", strerror(errno));
}
if (visual) {
printf("\nVisual Audio Levels.\n");
printf("--------------------\n");
printf(" Use chan_dahdi.conf file to adjust the gains if needed.\n\n");
printf("( # = Audio Level * = Max Audio Hit )\n");
draw_barheader();
}
/* Now, copy from pseudo to audio */
while (run) {
res_brx = read(pfd[MON_BRX], buf_brx, sizeof(buf_brx));
if (res_brx < 1)
break;
readcount += res_brx;
if (ofh[MON_BRX])
bytes_written[MON_BRX] += fwrite(buf_brx, 1, res_brx, ofh[MON_BRX]);
if (multichannel) {
res_tx = read(pfd[MON_TX], buf_tx, res_brx);
if (res_tx < 1)
break;
if (ofh[MON_TX])
bytes_written[MON_TX] += fwrite(buf_tx, 1, res_tx, ofh[MON_TX]);
if (stereo_output && ofh[MON_STEREO]) {
for (x = 0; x < res_tx; x++) {
stereobuf[x*2] = buf_brx[x];
stereobuf[x*2+1] = buf_tx[x];
}
bytes_written[MON_STEREO] += fwrite(stereobuf, 1, res_tx*2, ofh[MON_STEREO]);
}
if (visual) {
if (res_brx == res_tx)
visualize((short *)buf_tx, (short *)buf_brx, res_brx/2);
else
printf("Huh? res_tx = %d, res_brx = %d?\n", res_tx, res_brx);
}
}
if (preecho) {
res_brx = read(pfd[MON_PRE_BRX], buf_brx, sizeof(buf_brx));
if (res_brx < 1)
break;
if (ofh[MON_PRE_BRX])
bytes_written[MON_PRE_BRX] += fwrite(buf_brx, 1, res_brx, ofh[MON_PRE_BRX]);
if (multichannel) {
res_tx = read(pfd[MON_PRE_TX], buf_tx, res_brx);
if (res_tx < 1)
break;
if (ofh[MON_PRE_TX])
bytes_written[MON_PRE_TX] += fwrite(buf_tx, 1, res_tx, ofh[MON_PRE_TX]);
if (stereo_output && ofh[MON_PRE_STEREO]) {
for (x = 0; x < res_brx; x++) {
stereobuf[x*2] = buf_brx[x];
stereobuf[x*2+1] = buf_tx[x];
}
bytes_written[MON_PRE_STEREO] += fwrite(stereobuf, 1, res_brx * 2, ofh[MON_PRE_STEREO]);
}
}
}
if (ossoutput && afd) {
if (stereo) {
for (x = 0; x < res_brx; x++) {
buf_tx[x << 1] = buf_tx[(x << 1) + 1] = buf_brx[x];
}
x = write(afd, buf_tx, res_brx << 1);
} else {
x = write(afd, buf_brx, res_brx);
}
}
if (limit && readcount >= limit) {
/* bail if we've read too much */
break;
}
}
/* write filesize info */
for (i = 0; i < MAX_OFH; i++) {
if (NULL == ofh[i])
continue;
if (!(file_is_wav[i]))
continue;
wavheaders[i].riff_chunk_size = (bytes_written[i]) + sizeof(struct wavheader) - 8; /* filesize - 8 */
wavheaders[i].data_data_size = bytes_written[i];
rewind(ofh[i]);
if (fwrite(&wavheaders[i], 1, sizeof(struct wavheader), ofh[i]) != sizeof(struct wavheader)) {
fprintf(stderr, "Failed to write out a full wav header.\n");
}
fclose(ofh[i]);
}
printf("done cleaning up ... exiting.\n");
return 0;
}