Add LIBMTP_Get_Thumbnail_Format to get thumbnail format of a file.

src/libmtp.h

 /**
  * \file libmtp.h
  * Interface to the Media Transfer Protocol library.
  *
  * Copyright (C) 2005-2012 Linus Walleij <triad@df.lth.se>
  * Copyright (C) 2005-2008 Richard A. Low <richard@wentnet.com>
  * Copyright (C) 2007 Ted Bullock <tbullock@canada.com>
  * Copyright (C) 2008 Florent Mertens <flomertens@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 906 matching lines @@
 void LIBMTP_destroy_filesampledata_t(LIBMTP_filesampledata_t *);
 int LIBMTP_Get_Representative_Sample_Format(LIBMTP_mtpdevice_t *,
                         LIBMTP_filetype_t const,
                         LIBMTP_filesampledata_t **);
 int LIBMTP_Send_Representative_Sample(LIBMTP_mtpdevice_t *, uint32_t const,
                           LIBMTP_filesampledata_t *);
 int LIBMTP_Get_Representative_Sample(LIBMTP_mtpdevice_t *, uint32_t const,
                           LIBMTP_filesampledata_t *);
 int LIBMTP_Get_Thumbnail(LIBMTP_mtpdevice_t *, uint32_t const,
                          unsigned char **data, unsigned int *size);
+int LIBMTP_Get_Thumbnail_Format(LIBMTP_mtpdevice_t *device, uint32_t const id,
+                                uint16_t *format);
 
 /**
  * @}
  * @defgroup tracks The track management API.
  * @{
  */
 LIBMTP_track_t *LIBMTP_new_track_t(void);
 void LIBMTP_destroy_track_t(LIBMTP_track_t*);
 LIBMTP_track_t *LIBMTP_Get_Tracklisting(LIBMTP_mtpdevice_t*);
 LIBMTP_track_t *LIBMTP_Get_Tracklisting_With_Callback(LIBMTP_mtpdevice_t*,
@@ skipping 86 matching lines @@
 
 
 /** @} */
 
 /* End of C++ exports */
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* LIBMTP_H_INCLUSION_GUARD */