mp3lib/test2.c

   1
   2 //gcc test2.c -O2 -I.. -L. ../libvo/aclib.c -lMP3 -lm -o test2
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6
   7 #include <fcntl.h>
   8 #include <sys/ioctl.h>
   9 #include <unistd.h>
  10 #include <sys/soundcard.h>
  11
  12 #include "mp3lib/mp3.h"
  13 #include "config.h"
  14 #include "cpudetect.h"
  15
  16 static FILE* mp3file=NULL;
  17
  18 int mplayer_audio_read(char *buf,int size){
  19     return fread(buf,1,size,mp3file);
  20 }
  21
  22 #define BUFFLEN 4608
  23 static unsigned char buffer[BUFFLEN];
  24
  25
  26 int main(int argc,char* argv[]){
  27   int len;
  28   int total=0;
  29   float length;
  30   int r;
  31   int audio_fd;
  32
  33   mp3file=fopen((argc>1)?argv[1]:"test.mp3","rb");
  34   if(!mp3file){  printf("file not found\n");  exit(1); }
  35
  36   GetCpuCaps(&gCpuCaps);
  37
  38   // MPEG Audio:
  39 #ifdef USE_FAKE_MONO
  40   MP3_Init(0);
  41 #else
  42   MP3_Init();
  43 #endif
  44   MP3_samplerate=MP3_channels=0;
  45   len=MP3_DecodeFrame(buffer,-1);
  46
  47   audio_fd=open("/dev/dsp", O_WRONLY);
  48   if(audio_fd<0){  printf("Can't open audio device\n");exit(1); }
  49   r=AFMT_S16_LE;ioctl (audio_fd, SNDCTL_DSP_SETFMT, &r);
  50   r=MP3_channels-1;ioctl (audio_fd, SNDCTL_DSP_STEREO, &r);
  51   r=MP3_samplerate;ioctl (audio_fd, SNDCTL_DSP_SPEED, &r);
  52   printf("audio_setup: using %d Hz samplerate (requested: %d)\n",r,MP3_samplerate);
  53
  54   while(1){
  55       int len2;
  56       if(len==0) len=MP3_DecodeFrame(buffer,-1);
  57       if(len<=0) break; // EOF
  58
  59       // play it
  60       len2=write(audio_fd,buffer,len);
  61       if(len2<0) break; // ERROR?
  62       len-=len2; total+=len2;
  63       if(len>0){
  64           // this shouldn't happen...
  65           memcpy(buffer,buffer+len2,len);
  66           putchar('!');fflush(stdout);
  67       }
  68   }
  69
  70   fclose(mp3file);
  71
  72 }