getplaylist.c

来自「Media transfer protocol implementation o」· C语言 代码 · 共 67 行

#include "common.h"

static uint32_t dump_playlist(LIBMTP_mtpdevice_t *device, LIBMTP_playlist_t *pl)
{
  uint32_t i;

  printf("Number of items: %u\n", pl->no_tracks);
  if(pl->no_tracks > 0) {
    for(i=0;i<pl->no_tracks;i++) {
      LIBMTP_track_t *track;
      
      track = LIBMTP_Get_Trackmetadata(device, pl->tracks[i]);
      if (track != NULL) {
	printf("   %u: %s - %s\n", pl->tracks[i], track->artist, track->title);
	LIBMTP_destroy_track_t(track);
      } else {
	printf("   %u: INVALID TRACK REFERENCE!\n", pl->tracks[i]);
      }
    }
  }
  return 0;
}

int main (int argc, char **argv)
{
  LIBMTP_mtpdevice_t *device;
  LIBMTP_playlist_t *playlist;
  u_int32_t id;
  char *endptr;

  // We need file ID
  if ( argc != 2 ) {
    fprintf(stderr, "Just a playlist ID is required\n");
    return 1;
  }

  // Sanity check playlist ID
  id = strtoul(argv[1], &endptr, 10);
  if ( *endptr != 0 ) {
    fprintf(stderr, "illegal value %s\n", argv[1]);
    return 1;
  } else if ( ! id ) {
    fprintf(stderr, "bad playlist id %u\n", id);
    return 1;
 }

  LIBMTP_Init();
  device = LIBMTP_Get_First_Device();
  if (device == NULL) {
    printf("No devices. Connect/replug device and try again.\n");
    exit (0);
  }

  playlist = LIBMTP_Get_Playlist(device,id);  

  if (playlist != NULL) {
    dump_playlist(device,playlist);
  }

  LIBMTP_destroy_playlist_t(playlist);
  
  LIBMTP_Release_Device(device);
  printf("OK.\n");
  exit (0);
}