voice_task.c

ATMEL公司AT89C51SND1为主控制器MP3源代码

  
          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, TRUE);       /* 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;

          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 */
      disp_end_of_play();
      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_PLAY:
        print_state_play();
        voice_state = VOICE_PLAY_STOP;
        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;
        }
        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 */

      for (i = 255; i  != 0; i--)
      {
        voice_buffer[i] = 0x00;
      }
      voice_buffer[0] = 0x00;

      if (File_entry_root(FILE_WAV) == OK)  /* WAV file in root dir? */
      {
        do
        {
          (char *)file_name = File_get_name();    /* Get file name */
          if ((file_name[0] == 'V') &&
              (file_name[1] == 'O') &&
              (file_name[2] == 'I') &&
              (file_name[3] == 'C') &&
              (file_name[4] == 'E') &&
              ((file_name[5] >= '0') && (file_name[5] <= '9')) &&
              ((file_name[6] >= '0') && (file_name[6] <= '9')) &&
              ((file_name[7] >= '0') && (file_name[7] <= '9'))  
              )
          {
            /* Calculate actual index */
            i =  (Byte)(file_name[5] - '0') * 100;
            i += (Byte)(file_name[6] - '0') * 10;
            i += (Byte)(file_name[7] - '0') * 1;
            voice_buffer[i] = 0xFF;
          }
        }
        while (File_goto_next() == OK);   /* Do it still we have not reached the last file */
      }
      else
      {
        file_name = buff;
      }

      i = 0;
      if (voice_buffer[i] != 0x00)
      {
        i++;
        while ((voice_buffer[i] != 0x00) && (i != 0)) i++;  /* determine a free index */
      }

      if (voice_buffer[i] == 0)           /* Find a free indice ? */
      {
        file_name[0] = 'V';
        file_name[1] = 'O';
        file_name[2] = 'I';
        file_name[3] = 'C';
        file_name[4] = 'E';
        file_name[5] = '0' + (i / 100);
        file_name[6] = '0' + ((i % 100) / 10);
        file_name[7] = '0' + (((i % 100) % 10));
        file_name[8] = 'W';
        file_name[9] = 'A';
        file_name[10] = 'V';

        if (Fcreate(file_name, ATTR_FILE) != OK)     /* Create file */
        {
           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;
        }
      }
      else
      {
        voice_state = VOICE_ERROR;
      }
      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;

          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;

          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 -= 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_end_of_play();
      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:
    {
      i = Fdelete();
      if ((i == DEL_RET_OK) || (i == DEL_RET_ERROR_DIR))
      { /* at least 1 *.wav file in root */
        Frefresh(FILE_WAV);
        print_file_name();                  /* display file name */
        voice_state = VOICE_IDLE;
      }
      else
      { /* no  more *.wav file */
        print_state_blank();                /* select blank icon */
        print_screen(VOICE_SCREEN);         /* display voice screen */
        print_voice_vol(Voc_get_volume());  /* display volume level */
        voice_state = VOICE_NO_MSG;
      }
      break;
    }
  }
}