1 // Powershot N Facebook
2 #include "lolevel.h"
3 #include "platform.h"
4
5 typedef struct {
6 unsigned int address;
7 unsigned int length;
8 } cam_ptp_data_chunk; //camera specific structure
9
10 #define MAX_CHUNKS_FOR_FWT 7 // filewritetask is prepared for this many chunks
11 // Found in sub_FF3C0A2C (1.00a) --> "CMP R0, #6" and
12 // corresponds to filewritetask() jump table entries 0-6
13 /*
14 * fwt_data_struct: defined here as it's camera dependent
15 * unneeded members are designated with unkn
16 * file_offset, full_size, seek_flag only needs to be defined for DryOS>=r50 generation cameras
17 * pdc is always required
18 * name is not currently used
19 */
20 typedef struct
21 {
22 int unkn1;
23 int file_offset;
24 int full_size;
25 int unkn2, unkn3;
26 cam_ptp_data_chunk pdc[MAX_CHUNKS_FOR_FWT];
27 int seek_flag; // offset from start 0x4c = 76 bytes = 19 words
28 int unkn4, unkn5;
29 char name[32]; // offset from start 0x58 = 88 bytes = 22 words
30 } fwt_data_struct;
31 // seek_flag is different:
32 // seek state is activated (from state 0xc, open) when
33 // (word at 0x4c) AND 0x40
34 // OR
35 // write offset is not 0
36 #define FWT_MUSTSEEK 0x40 // value of the masked seek_flag indicating seek is required
37 #define FWT_SEEKMASK 0x40 // masks out unneeded bits of seek_flag
38
39 #include "../../../generic/filewrite.c"