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1655 giacomo 1
 
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#include "mpg123/mpg123.h"
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#include <stdlib.h>
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/* stub */
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FILE *http_open (char *url)
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{
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  return NULL;
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}
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static long rates[3][3] = {
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 { 32000,44100,48000 } ,
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 { 16000,22050,24000 } ,
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 {  8000,11025,12000 }
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};
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int supported_rates = 0;
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int outmode = DECODE_AUDIO;
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char *listname = NULL;
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long outscale  = 32768;
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int checkrange = FALSE;
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int tryresync  = TRUE;
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int quiet      = FALSE;
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int verbose    = 0;
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int doublespeed= 0;
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int halfspeed  = 0;
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int shuffle = 0;
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int change_always = 1;
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int force_8bit = 0;
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int force_frequency = -1;
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long numframes = -1;
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long startFrame= 0;
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int usebuffer  = 0;
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int frontend_type = 0;
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int remote     = 0;
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int buffer_fd[2];
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int buffer_pid;
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static int intflag = FALSE;
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static int remflag = FALSE;
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static char remote_buffer[1024];
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static struct frame fr;
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static struct audio_info_struct ai;
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txfermem *buffermem;
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#define FRAMEBUFUNIT (18 * 64 * 4)
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void init_output(void)
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{
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  static int init_done = FALSE;
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  if (init_done)
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    return;
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  init_done = TRUE;
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  if (!(pcm_sample = (unsigned char *) malloc(audiobufsize * 2))) {
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    perror ("malloc()");
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    l1_exit (1);
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  }
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  if(outmode==DECODE_AUDIO) {
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    //if(audio_open(&ai) < 0) {
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    //  perror("audio");
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    //  exit(1);
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    // }
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    /* audio_set_rate (&ai);  should already be done in audio_open() [OF] */
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  }
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}
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static void reset_audio_samplerate(void)
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{
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  //if (outmode == DECODE_AUDIO) {
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    /* audio_reset_parameters(&ai); */
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    /*   close and re-open in order to flush
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     *   the device's internal buffer before
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     *   changing the sample rate.   [OF]
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     */
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  //audio_close (&ai);
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    //if (audio_open(&ai) < 0) {
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  //  perror("audio");
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  //   exit(1);
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  // }
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  // }
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}
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void play_frame(int init,struct frame *fr)
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{
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  int clip;
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  if((fr->header_change && change_always) || init) {
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    int reset_audio = 0;
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    if(remote)
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      print_rheader(fr);
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    if (!quiet && init) {
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      if (verbose)
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        print_header(fr);
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      else
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        print_header_compact(fr);
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    }
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    if(force_frequency < 0) {
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      if(ai.rate != freqs[fr->sampling_frequency]>>(fr->down_sample)) {
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        ai.rate = freqs[fr->sampling_frequency]>>(fr->down_sample);
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        reset_audio = 1;
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      }
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    }
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    else if(ai.rate != force_frequency) {
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      ai.rate = force_frequency;
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      reset_audio = 1;
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    }
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    init_output();
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    if(reset_audio) {
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      reset_audio_samplerate();
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      if (intflag)
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        return;
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    }
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  }
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  if (fr->error_protection) {
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    getbits(16); /* crc */
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  }
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  clip = (fr->do_layer)(fr,outmode,&ai);
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  /*
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  if(clip > 0 && checkrange)
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    fprintf(stderr,"%d samples clipped\n", clip);
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  */
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}
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void audio_info_struct_init(struct audio_info_struct *ai)
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{
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  ai->rate = -1;
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  ai->gain = -1;
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  ai->output = -1;
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  ai->device = NULL;
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  ai->channels = -1;
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  ai->format = -1;
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}
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int audio_play_samples(struct audio_info_struct *ai, unsigned char *buf, int n)
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{
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  return 0;
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}
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int main(int argc,char *argv[])
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{
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  static char *fname="/MOSSE.MP3";
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  int result;
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  unsigned long frameNum = 0;
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  //struct timeval start_time, now;
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  unsigned long secdiff;
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  int init;
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  quiet=0;
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  verbose=1;
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  // DECODE_STDOUT stampa to 1
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  // DECODE_AUDIO chiama la audio_play_samples
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  // DECODE_BUFFER scrive su buffer_fd[1]
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  outmode = DECODE_AUDIO;
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  audio_info_struct_init(&ai);
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  fr.single = -1; /* both channels */
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  fr.synth = synth_1to1;
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  fr.down_sample = 0;
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  make_decode_tables(outscale);
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  init_layer2();
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  init_layer3(fr.down_sample);
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  open_stream(fname,-1);
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  //gettimeofday (&start_time, NULL);
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  read_frame_init();
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  init = 1;
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  for(frameNum=0;read_frame(&fr) && numframes && !intflag;frameNum++) {
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    if(frameNum < startFrame || (doublespeed && (frameNum % doublespeed))) {
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      if(fr.lay == 3)
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        set_pointer(512);
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      continue;
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    }
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    numframes--;
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    play_frame(init,&fr);
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    init = 0;
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      if (!(frameNum & 0xf))
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        fprintf(stderr, "\r{%4lu} ",frameNum);
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  }
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  close_stream();
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  {
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    /* This formula seems to work at least for
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     * MPEG 1.0/2.0 layer 3 streams.
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     */
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    int sfd = freqs[fr.sampling_frequency] * (fr.lsf + 1);
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    int secs = (frameNum * (fr.lay==1 ? 384 : 1152) + sfd / 2) / sfd;
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    fprintf(stderr,"[%d:%02d] Decoding of %s finished.\n", secs / 60,
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            secs % 60, fname);
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  }
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}
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