Differences

This shows you the differences between two versions of the page.

--- himdmusictransferformac [2009/03/26 23:20] – karcher
+++ himdmusictransferformac [2009/03/28 15:55] – wikiadmin
@@ Line 31: / Line 31: @@
 The goal here is to fully understand the C++-code which contains the HiMD-functionality and reimplement the code in C/C++ again. That code would reside inside a library called "libhimd" which then can be used from a simple Qt-based GUI to provide the functionality (and beyond :)) of "HiMD Transfer for Mac" on all platforms which support Qt.
+===== Operation =====
+The following will try to explain in detail how the software works (incomplete).
+==== Download of an MP3 to a MiniDisc ====
+  - Unmount the MiniDisc within MacOSX (the Disk-icon of the MiniDisc vanishes from desktop)
+  - Read disk-id and DES-encryption key from disk to generate key for block-encryption
+  - Fetch a 16kByte block of the source MP3 and encrypt it with some 3DES-like encryption, write into a 32kByte Buffer
+  - Fetch another 16kByte block, encrypt, write to the buffer and flush it
+  - Write the buffer to disk using special SCSI write-commands
+  - Repeat previous 3 commands until MP3 is written to disk
+  - Decode idv3-Tag from MP3 and create track-info and write to disk
+  - Once the application is closed, mount the disk in MacOS again (Icon reappars on desktop)
 ===== Links =====
 [[http://forums.minidisc.org/index.php?showtopic=6509&hl=sniff]]
+===== Connecting the device to Linux, USB-Output =====
+<code>
+[2405910.685270] usb 2-9: new full speed USB device using ohci_hcd and address 5
+[2405910.918600] usb 2-9: configuration #1 chosen from 1 choice
+[2405910.926599] scsi18 : SCSI emulation for USB Mass Storage devices
+[2405910.926599] usb-storage: device found at 5
+[2405910.926599] usb-storage: waiting for device to settle before scanning
+[2405910.926599] usb 2-9: New USB device found, idVendor=054c, idProduct=021a
+[2405910.926599] usb 2-9: New USB device strings: Mfr=1, Product=2, SerialNumber=3
+[2405910.926599] usb 2-9: Product: Hi-MD
+[2405910.926599] usb 2-9: Manufacturer: Sony
+[2405910.926599] usb 2-9: SerialNumber: 02000102A36E
+[2405916.130872] usb-storage: device scan complete
+[2405916.135091] scsi 18:0:0:0: Direct-Access     SONY     Hi-MD WALKMAN    1000 PQ: 0 ANSI: 0 CCS
+[2405916.147196] sd 18:0:0:0: [sdf] 149373 2048-byte hardware sectors (306 MB)
+[2405916.154210] sd 18:0:0:0: [sdf] Write Protect is off
+[2405916.154216] sd 18:0:0:0: [sdf] Mode Sense: 00 2a 05 00
+[2405916.154220] sd 18:0:0:0: [sdf] Assuming drive cache: write through
+[2405916.181629] sd 18:0:0:0: [sdf] 149373 2048-byte hardware sectors (306 MB)
+[2405916.187352] sd 18:0:0:0: [sdf] Write Protect is off
+[2405916.187359] sd 18:0:0:0: [sdf] Mode Sense: 00 2a 05 00
+[2405916.187362] sd 18:0:0:0: [sdf] Assuming drive cache: write through
+[2405916.187368]  sdf: unknown partition table
+[2405916.302773] sd 18:0:0:0: [sdf] Attached SCSI removable disk
+[2405916.302773] sd 18:0:0:0: Attached scsi generic sg5 type 0
+[2406419.909323] usb 2-9: USB disconnect, address 5
+</code>