mp3lib/test.c

   1
   2 #define DUMP_PCM
   3
   4 // gcc test.c -I.. -L. -lMP3 -lm -o test1 -O4
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 #include <unistd.h>
  10 #include <sys/time.h>
  11
  12 #include "mp3lib/mp3.h"
  13 #include "config.h"
  14
  15 #include "cpudetect.h"
  16 extern CpuCaps gCpuCaps;
  17
  18 static inline unsigned int GetTimer(){
  19   struct timeval tv;
  20   struct timezone tz;
  21 //  float s;
  22   gettimeofday(&tv,&tz);
  23 //  s=tv.tv_usec;s*=0.000001;s+=tv.tv_sec;
  24   return (tv.tv_sec*1000000+tv.tv_usec);
  25 }
  26
  27 static FILE* mp3file=NULL;
  28
  29 int mplayer_audio_read(char *buf,int size){
  30     return fread(buf,1,size,mp3file);
  31 }
  32
  33 #define BUFFLEN 4608
  34 static unsigned char buffer[BUFFLEN];
  35
  36 int main(int argc,char* argv[]){
  37   int len;
  38   int total=0;
  39   unsigned int time1;
  40   float length;
  41 #ifdef DUMP_PCM
  42   FILE *f=NULL;
  43   f=fopen("test.pcm","wb");
  44 #endif
  45
  46   mp3file=fopen((argc>1)?argv[1]:"test.mp3","rb");
  47   if(!mp3file){  printf("file not found\n");  exit(1); }
  48
  49   GetCpuCaps(&gCpuCaps);
  50
  51   // MPEG Audio:
  52 #ifdef USE_FAKE_MONO
  53   MP3_Init(0);
  54 #else
  55   MP3_Init();
  56 #endif
  57   MP3_samplerate=MP3_channels=0;
  58
  59   time1=GetTimer();
  60   while((len=MP3_DecodeFrame(buffer,-1))>0 && total<2000000){
  61       total+=len;
  62       // play it
  63 #ifdef DUMP_PCM
  64       fwrite(buffer,len,1,f);
  65 #endif
  66       //putchar('.');fflush(stdout);
  67   }
  68   time1=GetTimer()-time1;
  69   length=(float)total/(float)(MP3_samplerate*MP3_channels*2);
  70   printf("\nDecoding time: %8.6f\n",(float)time1*0.000001f);
  71   printf("Uncompressed size: %d bytes  (%8.3f secs)\n",total,length);
  72   printf("CPU usage at normal playback: %5.2f %%\n",time1*0.0001f/length);
  73
  74   fclose(mp3file);
  75
  76 }