voice_task.c

ATMEL全套MP3设计资料

          case KEY_PREV:
            voc_play_stop();                /* stop playing */
            disp_clock_stop();              /* suspend clock timer */
            Fclose();
            file_seek_prev(FILE_WAV);       /* select previous message */
            voice_state = VOICE_PLAY_NEW;
            break;
  
          case KEY_INC:
            voc_inc_volume();               /* increment volume */
            print_voice_vol(Voc_get_volume());  /* display new level */
            break;
  
          case KEY_DEC:
            voc_dec_volume();               /* decrement volume */
            print_voice_vol(Voc_get_volume());  /* display new level */
            break;
  
          case KEY_DEL:
            voc_play_stop();                /* stop playing */
            Fclose();
            voice_state = VOICE_DELETE;     /* remove file from FAT */
            break;

          case KEY_STOP:
            voc_play_stop();                /* stop playing */
            Fclose();
            voice_state = VOICE_PLAY_STOP;
            break;
  
          case KEY_LOCK:
            print_kbd_lock();               /* print keyboard status */
            break;
  
          default:
            break;
        }
        gl_key_press = FALSE;               /* ack key usage */
      }
      break;
    }


    case VOICE_PLAY_PAUSE:                  /* one file openned */
    {
      if (gl_key_press)                     /* a key is pressed? */
      {
        switch (gl_key)
        {
          case KEY_PLAY:
            disp_clock_start();             /* restart clock timer */
            voc_play_start();               /* restart sample request */
            print_state_play();             /* display play icon */
            voice_state = VOICE_PLAY;
            break;

          case KEY_NEXT:
            voc_play_stop();
            Fclose();
            file_seek_next(FILE_WAV, TRUE); /* select next message with loop */
            print_file_name();              /* display file name */
            voice_state = VOICE_IDLE;
            break;

          case KEY_PREV:
            voc_play_stop();
            Fclose();
            file_seek_prev(FILE_WAV);       /* select previous message */
            print_file_name();              /* display file name */
            voice_state = VOICE_IDLE;
            break;

          case KEY_INC:
            voc_inc_volume();               /* increment volume */
            print_voice_vol(Voc_get_volume());  /* display new level */
            break;

          case KEY_DEC:
            voc_dec_volume();               /* decrement volume */
            print_voice_vol(Voc_get_volume());  /* display new level */
            break;

          case KEY_STOP:
            voc_play_stop();                /* stop playing */
            Fclose();
            voice_state = VOICE_PLAY_STOP;
            break;

          case KEY_LOCK:
            print_kbd_lock();               /* print keyboard status */
            break;

          default:
            break;
        }
        gl_key_press = FALSE;               /* ack key usage */
      }
      break;
    }


    case VOICE_PLAY_NEW:
    {
      voice_state = VOICE_PLAY_INIT;        /* new message */
      print_file_name();                    /* display file name */
      break;
    }


    case VOICE_PLAY_STOP:
    {
      disp_clock_reset();                   /* reset clock timer */
      print_file_type();                    /* display wav icon */
      voice_state = VOICE_IDLE;
      break;
    }


    case VOICE_NO_MSG:
    {
      if (gl_key_press)                     /* a key is pressed? */
      {
        switch (gl_key)
        {
          case KEY_MEM:
            mem_select_next();              /* select next memory */
            voice_state = VOICE_START;
            break;

          case KEY_REC:
            voice_state = VOICE_REC_INIT;
            break;

          case KEY_MODE:
            mode_set_init();                /* exit from voice task */
            voice_state = VOICE_START;
            break;

          case KEY_LOCK:
            print_kbd_lock();               /* print keyboard status */
            break;
        }
        gl_key_press = FALSE;               /* ack key usage */
      }
      else
      { /* check card presence */
        if (mem_check_card() == KO)
        {
          mem_select_next();
          voice_state = VOICE_START;        /* card has been unplugged */
        }
      }
      break;
    }


    case VOICE_REC_INIT:
    {
      disp_clock_reset();                   /* reset clock timer */
      if (Fcreate() != OK)
      {
        voice_state = VOICE_ERROR;
      }
      else
      {
        print_file_name();                  /* display new file name */
        voc_cpt = 0;
        print_state_record();               /* display record icon */
        voc_rec_init();
        disp_clock_start();                 /* start clock timer */
        voice_state = VOICE_RECORD;
      }
      break;
    }


    case VOICE_RECORD:
    {
      while ((Byte)voc_cpt != gl_pointer)
      {
        Fputc(voice_buffer[(Byte)voc_cpt]);
        if (Feod())                         /* check end of disk */
        {
          Voc_rec_stop();                   /* stop voice sampling */
          voice_state = VOICE_REC_STOP;
          break;                            /* exit while loop */
        }
        voc_cpt++;
      }

      if (gl_key_press)                     /* a key is pressed? */
      {
        switch (gl_key)
        {
          case KEY_PAUSE:
            disp_clock_stop();              /* suspend clock timer */
            Voc_rec_pause();
            print_state_pause();            /* display pause icon */
            voice_state = VOICE_REC_PAUSE;
            break;

          case KEY_STOP:
            Voc_rec_stop();                 /* stop voice sampling */
            voice_state = VOICE_REC_STOP;
            break;

          case KEY_LOCK:
            print_kbd_lock();               /* print keyboard status */
            break;

          default:
            break;
        }
        gl_key_press = FALSE;               /* ack key usage */
      }
      break;
    }


    case VOICE_REC_PAUSE:
    {
      if (gl_key_press)                     /* a key is pressed? */
      {
        switch (gl_key)
        {
          case KEY_REC:
            disp_clock_start();             /* restart clock timer */
            print_state_record();           /* display record icon */
            Voc_rec_start();                /* restart sampling */
            voice_state = VOICE_RECORD;
            break;

          case KEY_STOP:
            Voc_rec_stop();                 /* stop voice sampling */
            voice_state = VOICE_REC_STOP;
            break;

          case KEY_LOCK:
            print_kbd_lock();               /* print keyboard status */
            break;

          default:
            break;
        }
        gl_key_press = FALSE;               /* ack key usage */
      }
      break;
    }


    case VOICE_REC_STOP:
    {
      /* update wave header */
      Fseek(-voc_cpt);                      /* beginning of file */
      Fputc(((Byte*)&gl_wav_header)[0]);    /* 'R' */
      Fputc(((Byte*)&gl_wav_header)[1]);    /* 'I' */
      Fputc(((Byte*)&gl_wav_header)[2]);    /* 'F' */
      Fputc(((Byte*)&gl_wav_header)[3]);    /* 'F' */
//      voc_cpt += 36;
      voc_cpt -= 8;
      Fputc(((Byte*)&voc_cpt)[3]);          /* wave length */
      Fputc(((Byte*)&voc_cpt)[2]);
      Fputc(((Byte*)&voc_cpt)[1]);
      Fputc(((Byte*)&voc_cpt)[0]);

      for (i = 8; i != WAV_HEADER_SIZE-4; i++)
      {
        Fputc(((Byte code *)&gl_wav_header)[i]);
      }
      voc_cpt -= 36;
      Fputc(((Byte*)&voc_cpt)[3]);          /* data length */
      Fputc(((Byte*)&voc_cpt)[2]);
      Fputc(((Byte*)&voc_cpt)[1]);
      Fputc(((Byte*)&voc_cpt)[0]);
      for (i = 255; i != 0; i--)
      {
        Fputc(0x80);                        /* fill first sector data */
      }
      for (i = 257 - WAV_HEADER_SIZE; i != 0; i--)
      {
        Fputc(0x80);                        /* fill first sector data */
      } 
      Fclose();
      disp_clock_reset();                   /* reset clock timer */
      print_file_type();                    /* display wav icon */
      voice_state = VOICE_IDLE;
      break;
    }


    case VOICE_ERROR:
    {
      disp_clock_reset();                   /* reset clock timer */
      print_state_error();                  /* display error icon */
      disp_name_stop();
      voice_state = VOICE_IDLE;
      break;
    }


    case VOICE_DELETE:
    {
      Fdelete();
      disp_clock_reset();                   /* reset clock timer */
      if (File_entry_root(FILE_WAV) == OK)/* WAV file in root dir? */
      {
        print_file_name();              /* display file name */
        voice_state = VOICE_IDLE;
      }
      else
      { /* no *.wav file in root */
        voice_state = VOICE_NO_MSG;
      }
      break;
    }
  }
}