firm/sample/simple_mp3_player/os/task_fileio.c

   1
   2 #include "pff.h"
   3 #include "lib.h"
   4 #include "task_fileio.h"
   5 #include "task_audio.h"
   6 #include "task_menu.h"
   7
   8 static FATFS fatfs;
   9 static DIR dir;
  10 static FILINFO filinfo;
  11
  12 static int readfunc(void *buf, int siz)
  13 {
  14     WORD cnt;
  15     pf_read(buf, siz, &cnt);
  16     return cnt;
  17 }
  18
  19 static int play(const char *filename)
  20 {
  21     FRESULT r = pf_open(filename);
  22     if (r != FR_OK) {
  23         return 1;
  24     }
  25     static int vol_prev = 0, vol_curr = 0;
  26     int divcnt = 0;
  27     int control = 0;
  28     while (audio_play(readfunc)) {
  29         switch ((divcnt++) % 8) {
  30             case 0:
  31                 /*
  32                  * \e$BAaAw$j$d4,$-La$7\e(B
  33                  */
  34                 menu_get_audio_control(&control);
  35                 if (control != 0) {
  36                     switch (control) {
  37                         case AUDIO_CONTROL_FWD:
  38                             if (fatfs.fptr + 8192 < fatfs.fsize) {
  39                                 pf_lseek(fatfs.fptr + 8192);
  40                             }
  41                             audio_cancel();
  42                             break;
  43                         case AUDIO_CONTROL_REW:
  44                             if (16384 < fatfs.fptr) {
  45                                 pf_lseek(fatfs.fptr - 16384);
  46                             }
  47                             audio_cancel();
  48                             break;
  49                     }
  50                 }
  51                 break;
  52             case 1:
  53                 /*
  54                  * \e$B%U%!%$%k>pJs$NDLCN\e(B
  55                  */
  56                 menu_file_info(
  57                         filinfo.fname, fatfs.fptr * 100 / fatfs.fsize);
  58                 break;
  59             case 2:
  60                 /*
  61                  * \e$B%*!<%G%#%*>pJs$N<hF@\e(B
  62                  */
  63                 menu_get_audio_info(&vol_curr);
  64                 if (vol_curr != vol_prev) {
  65                     audio_volume(vol_curr, vol_curr);
  66                 }
  67                 vol_prev = vol_curr;
  68                 break;
  69         }
  70     }
  71     return 0;
  72 }
  73
  74 static int is_music_file(const char *filename)
  75 {
  76     int len = strlen(filename);
  77     if (len < 4) {
  78         return 0;
  79     }
  80     if (strcmp(filename + len - 4, ".MP3") == 0) {
  81         return 1;
  82     }
  83     if (strcmp(filename + len - 4, ".WAV") == 0) {
  84         return 1;
  85     }
  86     return 0;
  87 }
  88
  89 int task_fileio(int argc, char *argv[])
  90 {
  91   while (1) {
  92       menu_file_info("Mounting...", 0);
  93       if (pf_mount(&fatfs)) {
  94           continue;
  95       }
  96       while (1) {
  97           menu_file_info("Directory", 0);
  98           if (pf_opendir(&dir, "")) {
  99               break;
 100           }
 101           while (!pf_readdir(&dir, &filinfo) && filinfo.fname[0]) {
 102               menu_file_info(filinfo.fname, 0);
 103               if (!(filinfo.fattrib & (AM_DIR | AM_HID))) {
 104                   if (is_music_file(filinfo.fname)) {
 105                       if (play(filinfo.fname)) {
 106                           break;
 107                       }
 108                   }
 109               }
 110           }
 111       }
 112   }
 113
 114   return 0;
 115 }
 116