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/*
DB Line In Utility
==================
DBin reads data from a sound device, and forwards the data to DBMix.
It is through the use of DBin that line in and microphone data can be
added to the DBMix system.
Version: 1
Author: Bob Dean
Copyright (c) 1999
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public Licensse 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 <glib.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <limits.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <dlfcn.h> /* functions used to dynamically link to libs */
#include <pthread.h>
#include <dbaudiolib.h>
#include <dbdebug.h>
#include "dbaudio.h"
#define DBIN_BUFSIZE (PIPE_BUF * 10)
#define DBIN_WRITESIZE (PIPE_BUF * 2)
#define DBIN_READSIZE (PIPE_BUF)
extern int debug_level;
int loop_flag, the_other_loop_flag;
int in_fd,out_fd;
int numch,sample_size,sample_rate,chindex;
enum channel_type_e type;
char audio_source_path[256];
int line_flag;
int stdout_flag;
#ifdef USE_DYNAMIC_LIBRARY
DBAudioLibFunctions * dbaudio;
void * h;
#endif
pthread_t buffer_thread;
gint read_index, write_index;
char * buffer;
oss_control_struct main_audio;
/***************************************************************************/
/* Initialization functions */
/***************************************************************************/
/*
print_help - outputs help to the console.
inputs - none
outputs - text to the console.
*/
void print_version()
{
printf("DBIn - line in and microphone client for DBMix\n");
printf("%s\n",DBMIX_COPYRIGHT);
printf("Compiled for DBMix version %s\n",DBMIX_VERSION);
}
void print_help()
{
print_version();
printf("\n");
printf("Usage:\n");
printf(" dbin [options]\n");
printf("\n");
printf("Supported options (argument type in parens) [default value in brackets]:\n");
printf(" -d print debug messages (none) [off]\n");
printf(" -l audio input source in line in (none) [mic]\n");
printf(" -a set audio device path (string) [/dev/dsp]\n");
printf(" -c X use channel X if available (int) [first available]\n");
printf(" -m input data is mono. (none) [Stereo]\n");
printf(" -r N input sampling rate is N Hz (int) [44100 Hz]\n");
printf(" -8 input data is 8 bit unsigned (none) [16 bit signed]\n");
printf(" -s output to stdout, not dbmix (none) [dbmix]\n");
printf(" -h print help screen (none) [mic]\n");
printf("\n\n");
}
/*
parse_cmdline - steps through argv and sets all the variables
inputs - argc argv
outputs - sets system variables
*/
void parse_cmdline(int argc, char* argv[])
{
int opt;
debug_level = 0;
numch = 2;
sample_size = 16;
sample_rate = 44100;
chindex = 0;
line_flag = 0;
stdout_flag = 0;
strcpy(audio_source_path,"/dev/dsp0");
while ((opt = getopt(argc,argv,"hsvda:lr:c:m8")) != -1)
{
switch (opt)
{
case 'd':
debug_level = 1;
break;
case 'h':
print_help();
exit(0);
break;
case 's':
stdout_flag = 1;
break;
case 'm':
numch = 1;
break;
case 'l':
line_flag = 1;
break;
case 'a':
strcpy(audio_source_path,optarg);
Debug("Set master audio device to be: \"%s\"",audio_source_path);
break;
case '8':
sample_size = 8;
Debug("set sample size to be AFMT_S8");
break;
case 'r':
sample_rate = atoi(optarg);
Debug("sample_rate is %d",sample_rate);
break;
case 'c':
chindex = atoi(optarg);
Debug("chindex is %d",chindex);
break;
case 'v':
print_version();
exit(0);
break;
case ':':
Debug("option needs a value");
exit(0);
case '?':
Debug("unknown option: %c",optopt);
exit(0);
default: break;
}
}
}
/*
sigexit - changes system variables to force clean shutdown
inputs - none
outputs - none
*/
void sigexit(int signum)
{
loop_flag = FALSE;
the_other_loop_flag = FALSE;
return;
}
/* function to sleep a thread for usec microseconds*/
void dbin_usleep(gint usec)
{
struct timeval tv;
tv.tv_sec = usec / 1000000;
usec -= tv.tv_sec * 1000000;
tv.tv_usec = usec;
select(0, NULL, NULL, NULL, &tv);
}
/* buffer thread loop - takes data from buffer and writes it to dbmix */
void * write_audio_loop(void * args)
{
gint used, count;
char * buf;
while (the_other_loop_flag)
{
buf = buffer + read_index;
/* determine if there is data to be written */
if (write_index >= read_index)
{
used = write_index - read_index;
}
used = DBIN_BUFSIZE - (read_index - write_index);
if (used > 0)
{
/* write to stdout if desired */
if (stdout_flag)
{
write(1,buf,DBIN_WRITESIZE);
}
else
{
/* write to dbmix */
#ifdef USE_DYNAMIC_LIBRARY
if ((count = dbaudio->DBAudio_Write(buf,DBIN_WRITESIZE)) == FAILURE)
#else
if ((count = DBAudio_Write(buf,DBIN_WRITESIZE)) == FAILURE)
#endif
{
#ifdef USE_DYNAMIC_LIBRARY
dbaudio->DBAudio_perror("DBIN: DBAudio_Write failed::");
#else
DBAudio_perror("DBIN: DBAudio_Write failed::");
#endif
}
}
/* update buffer control variables */
read_index += DBIN_WRITESIZE;
read_index = read_index % DBIN_BUFSIZE;
}
else
{
printf("writer sleeping");
dbin_usleep(10000);
}
}
pthread_exit(NULL);
}
/***************************************************************************/
/* MAIN */
/***************************************************************************/
int main(int argc, char **argv)
{
int error,count;
int mixer_fd, value;
oss_control_struct main_audio;
#ifdef USE_DYNAMIC_LIBRARY
void * (*get_fxns) (); /* define function pointer to hold pntr to DBAudio_Get_Functions() */
dbaudio = NULL;
#endif
type = PIPE_CHANNEL;
buffer = NULL;
/*install signal handlers*/
signal(SIGINT,sigexit);
signal(SIGTERM,sigexit);
parse_cmdline(argc,argv);
count = DBIN_BUFSIZE;
buffer = (char * ) malloc(count);
/* open audio device */
{
int flags;
int frag;
flags = O_RDONLY;
main_audio.sample_format = sample_size;
main_audio.channels = numch;
main_audio.sample_rate = sample_rate;
if((main_audio.fd_dsp = open(audio_source_path,flags,0)) == -1)
{
char str[256];
sprintf(str,"init_audio: cannot open device \"%s\"",audio_source_path);
perror(str);
exit(0);
}
Debug("opened audio device %s",audio_source_path);
frag = (10 << 16) | (DB_FRAGSIZE);
if(ioctl(main_audio.fd_dsp,SNDCTL_DSP_SETFRAGMENT,&frag) == -1)
{
perror("init_audio: could not set fragment size.");
goto cleanup;
}
else
{
Debug("init_audio: num fragments %d fragement size: %d",DB_NUM_FRAGMENTS,2^DB_FRAGSIZE);
}
if(ioctl(main_audio.fd_dsp,SNDCTL_DSP_SETFMT,&(main_audio.sample_format)) == -1)
{
perror("init_audio: failure setting format.");
/*perror("SNDCTL_DSP_SETFMT");*/
goto cleanup;
}
else
{
Debug("set sound format to be %d",main_audio.sample_format);
}
main_audio.channels = DBSTEREO;
if(ioctl(main_audio.fd_dsp,SNDCTL_DSP_STEREO,&(main_audio.channels)) == -1)
{
perror("init_audio: Error setting stereo");
/*perror("SNDCTL_DSP_STEREO");*/
goto cleanup;
}
else
{
Debug("set stereo mode");
}
/*set sample rate*/
if(ioctl(main_audio.fd_dsp,SNDCTL_DSP_SPEED,&(main_audio.sample_rate)) == -1)
{
perror("init_audio: Could not set sample rate.");
/*perror("SNDCTL_DSP_SPEED");*/
goto cleanup;
}
else
{
Debug("sample rate set to be %d",main_audio.sample_rate);
}
{
int frag_size;
audio_buf_info info;
Debug("****************");
Debug("device: %s",audio_source_path);
Debug("getting fragment data...");
if (ioctl(main_audio.fd_dsp, SNDCTL_DSP_GETBLKSIZE, &frag_size) == -1) perror("getting frag size");
Debug("Frag size: %d",frag_size);
ioctl(main_audio.fd_dsp, SNDCTL_DSP_GETOSPACE, &info);
Debug("fragments: %d",info.fragments);
Debug("fragstotal: %d",info.fragstotal);
Debug("fragsize: %d",info.fragsize);
Debug("bytes: %d",info.bytes);
Debug("****************");
}
}
/* init recording source */
{
mixer_fd = open("/dev/mixer0",O_RDONLY);
if (mixer_fd != -1)
{
if(line_flag)
{
Debug("Setting source to be line");
value = (1 << SOUND_MIXER_LINE);
}
else
{
Debug("Setting source to be mic");
value = (1 << SOUND_MIXER_MIC);
}
if (ioctl(mixer_fd,SOUND_MIXER_WRITE_RECSRC, &value) != 0)
{
Error("Could not set record source.");
goto cleanup;
}
else
{
Debug("Set record source.");
}
close(mixer_fd);
}
else
{
perror("DBin: failed to set record source.");
}
}
if (!stdout_flag)
{
#ifdef USE_DYNAMIC_LIBRARY
/* link against DBAudioLib and retrieve fucntion structure */
{
if ((h = dlopen("libdbaudiolib.so",RTLD_NOW)) == NULL)
{
Debug("Failed to open DBAudioLib:: %s",dlerror());
goto cleanup;
}
if ((get_fxns = dlsym(h,"DBAudio_Get_Functions")) == NULL)
{
Debug("Failed to retrieve pntr to DBAudio_Get_Functions: %s",dlerror());
goto cleanup;
}
dbaudio = (DBAudioLibFunctions*)get_fxns();
}
#endif
/* init dbaudiolib */
{
#ifdef USE_DYNAMIC_LIBRARY
error = dbaudio->DBAudio_Init("DBin",sample_size,sample_rate,numch,type,chindex);
dbaudio->DBAudio_Clear_Channel_Flag(PITCH_FLAG);
dbaudio->DBAudio_Clear_Channel_Flag(PAUSE_FLAG);
#else
error = DBAudio_Init("DBin",sample_size,sample_rate,numch,type,chindex);
DBAudio_Clear_Channel_Flag(PITCH_FLAG);
DBAudio_Clear_Channel_Flag(PAUSE_FLAG);
#endif
if (!line_flag)
{
#ifdef USE_DYNAMIC_LIBRARY
dbaudio->DBAudio_Set_Channel_Flag(MIC_FLAG);
#else
DBAudio_Set_Channel_Flag(MIC_FLAG);
#endif
}
if (error != SUCCESS)
{
Debug("Error. Is dbfsd running?");
goto cleanup;
}
else
{
Debug("Opened dbmix channel.");
}
}
}
/*init variables for main loop*/
loop_flag = TRUE;
the_other_loop_flag = TRUE;
count = 0;
pthread_create(&buffer_thread,NULL,write_audio_loop,NULL);
/* read data from soundcard */
{
gint len, free;
char * buf;
while (loop_flag)
{
buf = buffer + write_index;
/* determine if there is enough room in the buffer for new data */
if (read_index > write_index)
{
free = read_index - write_index;
}
else
{
free = DBIN_BUFSIZE - write_index;
}
if (read_index == write_index)
{
free = 0;
}
/* if there is free space */
if (free >= DBIN_READSIZE)
{
/* read data into buffer */
if ((len = read(main_audio.fd_dsp,buf,DBIN_READSIZE)) > 0)
{
write_index += DBIN_READSIZE;
write_index = write_index % DBIN_BUFSIZE;
}
else
{
if(errno != EIO)
{
loop_flag = FALSE;
perror("DBin main(): unexpected error:");
}
}
}
else
{
/* sleep if no space available */
Debug("reader sleeping");
dbin_usleep(5000);
}
}
}
cleanup:
/* pthread_join(buffer_thread, NULL); */
close(main_audio.fd_dsp);
if (buffer != NULL)
{
free(buffer);
}
#ifdef USE_DYNAMIC_LIBRARY
if (dbaudio != NULL)
{
dbaudio->DBAudio_Close();
}
dlclose(h);
#else
if (DBAudio_Ready())
{
DBAudio_Close();
}
#endif
Debug("DBin has completed. Have a nice day!\n");
exit(0);
}
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