detect.c

Media transfer protocol implementation on POSIX. Have detailed readme on how to move to windows

#include "common.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#define XML_BUFSIZE 0x10000

static void dump_xml_fragment(uint8_t *buf, uint32_t len)
{
  static int endianness = 0; // 0 = LE, 1 = BE
  uint32_t bp = 0;
  
  while (bp < len) {
    if (buf[bp+0] == 0xFF && buf[bp+1] == 0xFE) {
      endianness = 0;
    } else if (buf[bp+0] == 0xFE && buf[bp+1] == 0xff) {
      endianness = 1;
    } else {
      uint16_t tmp;
      
      if (endianness == 0) {
	tmp = buf[bp+1] << 8 | buf[bp+0];
      } else {
	tmp = buf[bp+0] << 8 | buf[bp+1];
      }
      // Fix this some day, we only print ISO 8859-1 correctly here,
      // should atleast support UTF-8.
      printf("%c", (uint8_t) tmp);
    }
    bp += 2;
  }
  printf("\n");
}

int main (int argc, char **argv)
{
  LIBMTP_mtpdevice_t *device;
  LIBMTP_file_t *files;
  uint32_t xmlfileid = 0;
  uint64_t totalbytes;
  uint64_t freebytes;
  char *storage_description;
  char *volume_label;
  char *friendlyname;
  char *syncpartner;
  char *sectime;
  char *devcert;
  uint16_t *filetypes;
  uint16_t filetypes_len;
  uint8_t maxbattlevel;
  uint8_t currbattlevel;
  int ret;
  int probeonly = 0;

  LIBMTP_Init();

  if (argc > 1 && !strcmp(argv[1], "-p")) {
    probeonly = 1;
  }

  if (probeonly) {
    uint16_t vid;
    uint16_t pid;

    ret = LIBMTP_Detect_Descriptor(&vid, &pid);
    if (ret > 0) {
      printf("DETECTED MTP DEVICE WITH VID:%04x, PID:%04X\n", vid, pid);
      exit(0);
    } else {
      exit(1);
    }
  }

  device = LIBMTP_Get_First_Device();
  if (device == NULL) {
    printf("No devices.\n");
    exit (0);
  }

  LIBMTP_Dump_Device_Info(device);
  
  printf("MTP-specific device properties:\n");
  // The friendly name
  friendlyname = LIBMTP_Get_Friendlyname(device);
  if (friendlyname == NULL) {
    printf("   Friendly name: (NULL)\n");
  } else {
    printf("   Friendly name: %s\n", friendlyname);
    free(friendlyname);
  }
  syncpartner = LIBMTP_Get_Syncpartner(device);
  if (syncpartner == NULL) {
    printf("   Synchronization partner: (NULL)\n");
  } else {
    printf("   Synchronization partner: %s\n", syncpartner);
    free(syncpartner);
  }

  // Some storage info
  ret = LIBMTP_Get_Storageinfo(device, &totalbytes, &freebytes, &storage_description, &volume_label);
  if (ret == 0) {
#ifdef __WIN32__
    printf("   Total bytes on device: %I64u (%I64u MB)\n",
	   totalbytes, totalbytes/(1024*1024));
    printf("   Free bytes on device: %I64u (%I64u MB)\n",
	   freebytes, freebytes/(1024*1024));
#else
    printf("   Total bytes on device: %llu (%llu MB)\n",
	   totalbytes, totalbytes/(1024*1024));
    printf("   Free bytes on device: %llu (%llu MB)\n",
	   freebytes, freebytes/(1024*1024));
#endif
    if (storage_description != NULL) {
      printf("   Storage description: \"%s\"\n", storage_description);
      free(storage_description);
    }
    if (volume_label != NULL) {
      printf("   Volume label: \"%s\"\n", volume_label);
      free(volume_label);
    }
  } else {
    printf("   Error getting disk info...\n");
  }

  // Some battery info
  ret = LIBMTP_Get_Batterylevel(device, &maxbattlevel, &currbattlevel);
  if (ret == 0) {
    printf("   Battery level %d of %d (%d%%)\n",currbattlevel, maxbattlevel, 
	   (int) ((float) currbattlevel/ (float) maxbattlevel * 100.0));
  } else {
    // Silently ignore. Some devices does not support getting the 
    // battery level.
  }

  ret = LIBMTP_Get_Supported_Filetypes(device, &filetypes, &filetypes_len);
  if (ret == 0) {
    uint16_t i;
    
    printf("libmtp supported (playable) filetypes:\n");
    for (i = 0; i < filetypes_len; i++) {
      printf("   %s\n", LIBMTP_Get_Filetype_Description(filetypes[i]));
    }
  }

  // Secure time XML fragment
  ret = LIBMTP_Get_Secure_Time(device, &sectime);
  if (ret == 0 && sectime != NULL) {
    printf("\nSecure Time:\n%s\n", sectime);
    free(sectime);
  }

  // Device certificate XML fragment
  ret = LIBMTP_Get_Device_Certificate(device, &devcert);
  if (ret == 0 && devcert != NULL) {
    printf("\nDevice Certificate:\n%s\n", devcert);
    free(devcert);
  }

  // Try to get Media player device info XML file...
  files = LIBMTP_Get_Filelisting_With_Callback(device, NULL, NULL);
  if (files != NULL) {
    LIBMTP_file_t *file, *tmp;
    file = files;
    while (file != NULL) {
      if (!strcmp(file->filename, "WMPInfo.xml")) {
	xmlfileid = file->item_id;
      }
      tmp = file;
      file = file->next;
      LIBMTP_destroy_file_t(tmp);
    }
  }
  if (xmlfileid != 0) {
    FILE *xmltmp = tmpfile();
    int tmpfile = fileno(xmltmp);
    
    if (tmpfile != -1) {
      int ret = LIBMTP_Get_Track_To_File_Descriptor(device, xmlfileid, tmpfile, NULL, NULL);
      if (ret == 0) {
	uint8_t *buf = NULL;
	uint32_t readbytes;

	buf = malloc(XML_BUFSIZE);
	if (buf == NULL) {
	  printf("Could not allocate %08x bytes...\n", XML_BUFSIZE);
	  exit(1);
	}
	lseek(tmpfile, 0, SEEK_SET);
	readbytes = read(tmpfile, (void*) buf, XML_BUFSIZE);
	
	if (readbytes >= 2 && readbytes < XML_BUFSIZE) {
	  printf("\nDevice description WMPInfo.xml file:\n");
	  dump_xml_fragment(buf, readbytes);
	}
      }
      fclose(xmltmp);
    }
  }

  // King Fisher of Triad rocks your world!
  LIBMTP_Release_Device(device);
  printf("OK.\n");
  exit (0);
}