Esempio n. 1
0
static int control(sh_audio_t *sh,int cmd,void* arg, ...)
{
    switch(cmd)
    {
      case ADCTRL_RESYNC_STREAM:
          MP3_DecodeFrame(NULL,-2); // resync
          MP3_DecodeFrame(NULL,-2); // resync
          MP3_DecodeFrame(NULL,-2); // resync
	  return CONTROL_TRUE;
      case ADCTRL_SKIP_FRAME:
	  MP3_DecodeFrame(NULL,-2); // skip MPEG frame
	  return CONTROL_TRUE;
    }
  return CONTROL_UNKNOWN;
}
Esempio n. 2
0
int main(int argc,char* argv[]){
  int len;
  int total=0;
  float length;
  int r;
  int audio_fd;
  
  mp3file=fopen((argc>1)?argv[1]:"test.mp3","rb");
  if(!mp3file){  printf("file not found\n");  exit(1); }
  
  GetCpuCaps(&gCpuCaps);

  // MPEG Audio:
#ifdef USE_FAKE_MONO
  MP3_Init(0);
#else
  MP3_Init();
#endif
  MP3_samplerate=MP3_channels=0;
  len=MP3_DecodeFrame(buffer,-1);
  
  audio_fd=open("/dev/dsp", O_WRONLY);
  if(audio_fd<0){  printf("Can't open audio device\n");exit(1); }
  r=AFMT_S16_LE;ioctl (audio_fd, SNDCTL_DSP_SETFMT, &r);
  r=MP3_channels-1;ioctl (audio_fd, SNDCTL_DSP_STEREO, &r);
  r=MP3_samplerate;ioctl (audio_fd, SNDCTL_DSP_SPEED, &r);
  printf("audio_setup: using %d Hz samplerate (requested: %d)\n",r,MP3_samplerate);
  
  while(1){
      int len2;
      if(len==0) len=MP3_DecodeFrame(buffer,-1);
      if(len<=0) break; // EOF
      
      // play it
      len2=write(audio_fd,buffer,len);
      if(len2<0) break; // ERROR?
      len-=len2; total+=len2;
      if(len>0){
          // this shouldn't happen...
          memcpy(buffer,buffer+len2,len);
          putchar('!');fflush(stdout);
      }
  }
  
  fclose(mp3file);
  
}
Esempio n. 3
0
static int init(sh_audio_t *sh)
{
  // MPEG Audio:
  dec_audio_sh=sh; // save sh_audio for the callback:
//  MP3_Init(fakemono,mplayer_accel,&mplayer_audio_read); // TODO!!!
#ifdef USE_FAKE_MONO
  MP3_Init(fakemono);
#else
  MP3_Init();
#endif
  MP3_samplerate=MP3_channels=0;
  sh->a_buffer_len=MP3_DecodeFrame(sh->a_buffer,-1);
  if(!sh->a_buffer_len) return 0; // unsupported layer/format
  sh->channels=2; // hack
  sh->samplesize=2;
  sh->samplerate=MP3_samplerate;
  sh->i_bps=MP3_bitrate*(1000/8);
  MP3_PrintHeader();
  return 1;
}
int main(int argc,char* argv[]){
  int len;
  int total=0;
  unsigned int time1;
  float length;
#ifdef DUMP_PCM
  FILE *f=NULL;
  f=fopen("test.pcm","wb");
#endif

  mp3file=fopen((argc>1)?argv[1]:"test.mp3","rb");
  if(!mp3file){  printf("file not found\n");  exit(1); }

  GetCpuCaps(&gCpuCaps);

  // MPEG Audio:
#ifdef CONFIG_FAKE_MONO
  MP3_Init(0);
#else
  MP3_Init();
#endif
  MP3_samplerate=MP3_channels=0;

  time1=GetTimer();
  while((len=MP3_DecodeFrame(buffer,-1))>0 && total<2000000){
      total+=len;
      // play it
#ifdef DUMP_PCM
      fwrite(buffer,len,1,f);
#endif
      //putchar('.');fflush(stdout);
  }
  time1=GetTimer()-time1;
  length=(float)total/(float)(MP3_samplerate*MP3_channels*2);
  printf("\nDecoding time: %8.6f\n",(float)time1*0.000001f);
  printf("Uncompressed size: %d bytes  (%8.3f secs)\n",total,length);
  printf("CPU usage at normal playback: %5.2f %%\n",time1*0.0001f/length);

  fclose(mp3file);
  return 0;
}
Esempio n. 5
0
static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
{
   return MP3_DecodeFrame(buf,-1);
}