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#include <sys/soundcard.h>
#include <stdio.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "mp3info.h"
#include <termio.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
static int decpid;
static int decinpipe;
static int dsp_speed, dsp_stereo;
static int samplesize;
static int audio;
static char audio_name[20] = AUDIO;
static int canplay,lastsig;
int initpipe(void) {
int dec_inpipe[2];
int devnull;
devnull=open("/dev/null",O_WRONLY);
if (pipe(dec_inpipe)!=0) {
return(0);
}
if ((decpid = fork()) == 0) {
close(dec_inpipe[1]);
dup2(dec_inpipe[0], fileno(stdin));
close(dec_inpipe[0]);
dup2(audio,fileno(stdout));
dup2(devnull,fileno(stderr));
execlp(DECODER, DECODER, DECODEOPTS, NULL);
fprintf(stderr, "Error: Decoder failed.\n");
exit(1);
}
close(dec_inpipe[0]);
decinpipe = dec_inpipe[1];
close(devnull);
return(1);
}
int initsound() {
int tmp;
audio = open (audio_name, O_WRONLY, 0);
if (audio == -1) {
perror (audio_name);
return(0);
}
tmp = 0x7FFF000C;
if (ioctl(audio, SNDCTL_DSP_SETFRAGMENT, &tmp)) {
fprintf(stderr,"Error: Unable to optimize fragment size.\n");
}
tmp = samplesize;
ioctl(audio, SNDCTL_DSP_SAMPLESIZE, &samplesize);
if (tmp != samplesize) {
fprintf(stderr, "Error: Unable to set the sample size.\n");
return(0);
}
if (ioctl (audio, SNDCTL_DSP_STEREO, &dsp_stereo)==-1) {
fprintf (stderr, "Error: Unable to set mono/stereo.\n");
perror (audio_name);
return(0);
}
if (ioctl (audio, SNDCTL_DSP_SPEED, &dsp_speed) == -1) {
fprintf (stderr, "Error: Unable to set audio speed.\n");
perror (audio_name);
return(0);
}
ioctl (audio, SNDCTL_DSP_GETBLKSIZE, &tmp);
if (tmp!=4096) {
fprintf (stderr, "Error: Fragment size is not 4096.\n");
}
return(1);
}
void end(int wait) {
if (decpid) {
if (wait) ioctl(audio,SNDCTL_DSP_POST,0);
close(decinpipe);
if (wait) ioctl(audio, SNDCTL_DSP_SYNC, 0);
kill(decpid, SIGKILL);
close(audio);
decpid = 0;
decinpipe = 0;
}
}
void sighandler(int sig) {
canplay=0;
lastsig=sig;
return;
}
bool Mpfile::play(int threads) {
char buffer[PLAY_BUF_LEN];
size_t size;
struct sigaction sigstruc;
dsp_speed=layer->sfreq();
samplesize=16;
if (layer->stereo) dsp_stereo=1;
else dsp_stereo=0;
if (!initsound()) {
fprintf(stderr,"Error: Failed to init sound device.\n");
return(0);
}
if (!initpipe()) {
fprintf(stderr,"Error: Failed to open Decoder Pipe.\n");
return(0);
}
#ifdef L3UNREG
write(decinpipe,"N",1);
#endif
canplay=1;
lastsig=0;
sigstruc.sa_handler=sighandler;
memset(&sigstruc.sa_mask,0,sizeof(sigstruc.sa_mask));
sigstruc.sa_flags=SA_RESTART;
sigaction(SIGHUP,&sigstruc,NULL);
sigaction(SIGTERM,&sigstruc,NULL);
signal(SIGCHLD,SIG_IGN);
fseek(file,0,SEEK_SET);
while ((size=fread(&buffer,1,PLAY_BUF_LEN,file)) && canplay) {
write(decinpipe,&buffer,size);
}
end(canplay);
if (lastsig==SIGTERM) exit(0);
return(1);
}
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