mirror of
https://github.com/d0k3/GodMode9.git
synced 2025-06-26 13:42:47 +00:00
Added simple DISA / DIFF decoder
This commit is contained in:
d0k3
parent
03a9ca6a44
commit
cabe185016
274
arm9/source/game/disadiff.c
Normal file
274
arm9/source/game/disadiff.c
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@ -0,0 +1,274 @@
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#include "disadiff.h"
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#include "image.h"
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#include "vff.h"
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#define GET_DPFS_BIT(b, lvl) (((((u32*) (void*) lvl)[b >> 5]) >> (31 - (b % 32))) & 1)
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static FIL ddfile;
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static FIL* ddfp = NULL;
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inline static u32 DisaDiffSize(const TCHAR* path) {
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return path ? fvx_qsize(path) : GetMountSize();
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}
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inline static FRESULT DisaDiffOpen(const TCHAR* path) {
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FRESULT res = FR_OK;
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ddfp = NULL;
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if (path) {
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res = fvx_open(&ddfile, path, FA_READ | FA_OPEN_EXISTING);
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if (res == FR_OK) ddfp = &ddfile;
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} else if (!GetMountState()) res = FR_DENIED;
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return res;
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}
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inline static FRESULT DisaDiffRead(void* buf, UINT btr, UINT ofs) {
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if (ddfp) {
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FRESULT res;
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UINT br;
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if ((fvx_tell(ddfp) != ofs) &&
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(fvx_lseek(ddfp, ofs) != FR_OK)) return FR_DENIED;
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res = fvx_read(ddfp, buf, btr, &br);
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if ((res == FR_OK) && (br != btr)) res = FR_DENIED;
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return res;
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} else return (ReadImageBytes(buf, (u64) ofs, (u64) btr) == 0) ? FR_OK : FR_DENIED;
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}
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inline static FRESULT DisaDiffClose() {
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if (ddfp) {
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ddfp = NULL;
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return fvx_close(&ddfile);
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} else return FR_OK;
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}
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inline static FRESULT DisaDiffQRead(const TCHAR* path, void* buf, UINT ofs, UINT btr) {
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if (path) return fvx_qread(path, buf, ofs, btr, NULL);
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else return (ReadImageBytes(buf, (u64) ofs, (u64) btr) == 0) ? FR_OK : FR_DENIED;
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}
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u32 GetDisaDiffReaderInfo(const char* path, DisaDiffReaderInfo* info, bool partitionB) {
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const u8 disa_magic[] = { DISA_MAGIC };
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const u8 diff_magic[] = { DIFF_MAGIC };
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const u8 ivfc_magic[] = { IVFC_MAGIC };
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const u8 dpfs_magic[] = { DPFS_MAGIC };
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const u8 difi_magic[] = { DIFI_MAGIC };
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// reset reader info
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memset(info, 0x00, sizeof(DisaDiffReaderInfo));
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// get file size, header at header offset
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u32 file_size = DisaDiffSize(path);
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u8 header[0x100];
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if (DisaDiffQRead(path, header, 0x100, 0x100) != FR_OK) return 1;
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// DISA/DIFF header: find partition offset & size and DIFI descriptor
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u32 offset_partition = 0;
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u32 size_partition = 0;
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u32 offset_difi = 0;
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if (memcmp(header, disa_magic, 8) == 0) { // DISA file
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DisaHeader* disa = (DisaHeader*) (void*) header;
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offset_difi = (disa->active_table) ? disa->offset_table1 : disa->offset_table0;
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if (!partitionB) {
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offset_partition = (u32) disa->offset_partitionA;
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size_partition = (u32) disa->size_partitionA;
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offset_difi += (u32) disa->offset_descA;
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} else {
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if (disa->n_partitions != 2) return 1;
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offset_partition = (u32) disa->offset_partitionB;
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size_partition = (u32) disa->size_partitionB;
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offset_difi += (u32) disa->offset_descB;
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}
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} else if (memcmp(header, diff_magic, 8) == 0) { // DIFF file
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if (partitionB) return 1;
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DiffHeader* diff = (DiffHeader*) (void*) header;
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offset_partition = (u32) diff->offset_partition;
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size_partition = (u32) diff->size_partition;
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offset_difi = (diff->active_table) ? diff->offset_table1 : diff->offset_table0;
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}
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// check the output so far
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if (!offset_difi || (offset_difi + sizeof(DifiStruct) > file_size) ||
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(offset_partition + size_partition > file_size))
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return 1;
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// read DIFI struct from filr
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DifiStruct difis;
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if (DisaDiffQRead(path, &difis, offset_difi, sizeof(DifiStruct)) != FR_OK) return 1;
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if ((memcmp(difis.difi.magic, difi_magic, 8) != 0) ||
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(memcmp(difis.ivfc.magic, ivfc_magic, 8) != 0) ||
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(memcmp(difis.dpfs.magic, dpfs_magic, 8) != 0))
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return 1;
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// check & get data from DIFI header
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DifiHeader* difi = &(difis.difi);
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if ((difi->offset_ivfc != sizeof(DifiHeader)) ||
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(difi->size_ivfc != sizeof(IvfcDescriptor)) ||
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(difi->offset_dpfs != difi->offset_ivfc + difi->size_ivfc) ||
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(difi->size_dpfs != sizeof(DpfsDescriptor)) ||
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(difi->offset_hash != difi->offset_dpfs + difi->size_dpfs) ||
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(difi->size_hash < 0x20))
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return 1;
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info->dpfs_lvl1_selector = difi->dpfs_lvl1_selector;
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info->ivfc_use_extlvl4 = difi->ivfc_use_extlvl4;
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info->offset_ivfc_lvl4 = (u32) (offset_partition + difi->ivfc_offset_extlvl4);
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// check & get data from DPFS descriptor
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DpfsDescriptor* dpfs = &(difis.dpfs);
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if ((dpfs->offset_lvl1 + dpfs->size_lvl1 > dpfs->offset_lvl2) ||
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(dpfs->offset_lvl2 + dpfs->size_lvl2 > dpfs->offset_lvl3) ||
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(dpfs->offset_lvl3 + dpfs->size_lvl3 > size_partition) ||
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(2 > dpfs->log_lvl2) || (dpfs->log_lvl2 > dpfs->log_lvl3) ||
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!dpfs->size_lvl1 || !dpfs->size_lvl2 || !dpfs->size_lvl3)
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return 1;
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info->offset_dpfs_lvl1 = (u32) (offset_partition + dpfs->offset_lvl1);
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info->offset_dpfs_lvl2 = (u32) (offset_partition + dpfs->offset_lvl2);
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info->offset_dpfs_lvl3 = (u32) (offset_partition + dpfs->offset_lvl3);
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info->size_dpfs_lvl1 = (u32) dpfs->size_lvl1;
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info->size_dpfs_lvl2 = (u32) dpfs->size_lvl2;
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info->size_dpfs_lvl3 = (u32) dpfs->size_lvl3;
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info->log_dpfs_lvl2 = (u32) dpfs->log_lvl2;
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info->log_dpfs_lvl3 = (u32) dpfs->log_lvl3;
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// check & get data from IVFC descriptor
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IvfcDescriptor* ivfc = &(difis.ivfc);
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if ((ivfc->size_hash != difi->size_hash) ||
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(ivfc->size_ivfc != sizeof(IvfcDescriptor)) ||
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(ivfc->offset_lvl1 + ivfc->size_lvl1 > ivfc->offset_lvl2) ||
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(ivfc->offset_lvl2 + ivfc->size_lvl2 > ivfc->offset_lvl3) ||
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(ivfc->offset_lvl3 + ivfc->size_lvl3 > dpfs->size_lvl3))
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return 1;
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if (!info->ivfc_use_extlvl4) {
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if ((ivfc->offset_lvl3 + ivfc->size_lvl3 > ivfc->offset_lvl4) ||
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(ivfc->offset_lvl4 + ivfc->size_lvl4 > dpfs->size_lvl3))
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return 1;
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info->offset_ivfc_lvl4 = (u32) ivfc->offset_lvl4;
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} else if (info->offset_ivfc_lvl4 + ivfc->size_lvl4 > offset_partition + size_partition) {
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return 1;
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}
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info->size_ivfc_lvl4 = (u32) ivfc->size_lvl4;
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return 0;
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}
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u32 BuildDisaDiffDpfsLvl2Cache(const char* path, DisaDiffReaderInfo* info, u8* cache, u32 cache_size) {
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const u32 min_cache_bits = (info->size_dpfs_lvl3 + (1 << info->log_dpfs_lvl3) - 1) >> info->log_dpfs_lvl3;
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const u32 min_cache_size = ((min_cache_bits + 31) >> (3 + 2)) << 2;
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const u32 offset_lvl1 = info->offset_dpfs_lvl1 + ((info->dpfs_lvl1_selector) ? info->size_dpfs_lvl1 : 0);
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// safety (this still assumes all the checks from GetDisaDiffReaderInfo())
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if (info->ivfc_use_extlvl4 ||
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(cache_size < min_cache_size) ||
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(min_cache_size > info->size_dpfs_lvl2) ||
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(min_cache_size > (info->size_dpfs_lvl1 << (3 + info->log_dpfs_lvl2))))
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return 1;
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// allocate memory
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u8* lvl1 = (u8*) malloc(info->size_dpfs_lvl1);
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if (!lvl1) return 1; // this is never more than 8 byte in reality -___-
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// open file pointer
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if (DisaDiffOpen(path) != FR_OK) {
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free(lvl1);
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return 1;
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}
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// read lvl1
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u32 ret = 0;
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if ((ret != 0) || DisaDiffRead(lvl1, info->size_dpfs_lvl1, offset_lvl1)) ret = 1;
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// read full lvl2_0 to cache
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if ((ret != 0) || DisaDiffRead(cache, info->size_dpfs_lvl2, info->offset_dpfs_lvl2)) ret = 1;
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// cherry-pick lvl2_1
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u32 log_lvl2 = info->log_dpfs_lvl2;
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u32 offset_lvl2_1 = info->offset_dpfs_lvl2 + info->size_dpfs_lvl2;
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for (u32 i = 0; (ret == 0) && ((i << (3 + log_lvl2)) < min_cache_size); i += 4) {
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u32 dword = *(u32*) (void*) (lvl1 + i);
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for (u32 b = 0; b < 32; b++) {
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if ((dword >> (31 - b)) & 1) {
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u32 offset = ((i << 3) + b) << log_lvl2;
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if (DisaDiffRead((u8*) cache + offset, 1 << log_lvl2, offset_lvl2_1 + offset) != FR_OK) ret = 1;
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}
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}
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}
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info->dpfs_lvl2_cache = cache;
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free(lvl1);
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DisaDiffClose();
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return ret;
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}
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u32 ReadDisaDiffIvfcLvl4(const char* path, DisaDiffReaderInfo* info, u32 offset, u32 size, void* buffer) {
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// data: full DISA/DIFF file in memory
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// offset: offset inside IVFC lvl4
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// DisaDiffReaderInfo not provided?
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DisaDiffReaderInfo info_l;
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u8* cache = NULL;
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if (!info) {
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info = &info_l;
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if (GetDisaDiffReaderInfo(path, info, false) != 0) return 0;
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cache = malloc(info->size_dpfs_lvl2);
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if (!cache) return 0;
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if (BuildDisaDiffDpfsLvl2Cache(path, info, cache, info->size_dpfs_lvl2) != 0) {
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free(cache);
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return 0;
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}
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}
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// sanity checks - offset & size
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if (offset > info->size_ivfc_lvl4) return 0;
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else if (offset + size > info->size_ivfc_lvl4) size = info->size_ivfc_lvl4 - offset;
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if (info->ivfc_use_extlvl4) {
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// quick reading in case of external IVFC lvl4
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if (DisaDiffQRead(path, buffer, info->offset_ivfc_lvl4 + offset, size) != FR_OK) size = 0;
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} else {
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// full reading in standard case
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const u32 offset_start = info->offset_ivfc_lvl4 + offset;
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const u32 offset_end = offset_start + size;
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const u8* lvl2 = info->dpfs_lvl2_cache;
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const u32 offset_lvl3_0 = info->offset_dpfs_lvl3;
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const u32 offset_lvl3_1 = offset_lvl3_0 + info->size_dpfs_lvl3;
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const u32 log_lvl3 = info->log_dpfs_lvl3;
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u32 read_start = offset_start;
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u32 read_end = read_start;
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u32 bit_state = 0;
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// open file pointer
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if (DisaDiffOpen(path) != FR_OK) size = 0;
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// full reading below
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while (size && (read_start < offset_end)) {
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// read bits until bit_state does not match
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// idx_lvl2 is a bit offset
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u32 idx_lvl2 = read_end >> log_lvl3;
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if (GET_DPFS_BIT(idx_lvl2, lvl2) == bit_state) {
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read_end = (idx_lvl2+1) << log_lvl3;
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if (read_end >= offset_end) read_end = offset_end;
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else continue;
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}
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// read data if there is any
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if (read_start < read_end) {
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const u32 pos_f = (bit_state ? offset_lvl3_1 : offset_lvl3_0) + read_start;
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const u32 pos_b = read_start - offset_start;
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const u32 btr = read_end - read_start;
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if (DisaDiffRead((u8*) buffer + pos_b, btr, pos_f) != FR_OK) size = 0;
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read_start = read_end;
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}
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// flip the bit_state
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bit_state = ~bit_state & 0x1;
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}
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DisaDiffClose();
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}
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if (cache) free(cache);
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return size;
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}
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129
arm9/source/game/disadiff.h
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129
arm9/source/game/disadiff.h
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@ -0,0 +1,129 @@
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#pragma once
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#include "common.h"
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// info taken from here:
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// http://3dbrew.org/wiki/DISA_and_DIFF
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// https://github.com/wwylele/3ds-save-tool
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#define DISA_MAGIC 'D', 'I', 'S', 'A', 0x00, 0x00, 0x04, 0x00
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#define DIFF_MAGIC 'D', 'I', 'F', 'F', 0x00, 0x00, 0x03, 0x00
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#define IVFC_MAGIC 'I', 'V', 'F', 'C', 0x00, 0x00, 0x02, 0x00
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#define DPFS_MAGIC 'D', 'P', 'F', 'S', 0x00, 0x00, 0x01, 0x00
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#define DIFI_MAGIC 'D', 'I', 'F', 'I', 0x00, 0x00, 0x01, 0x00
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typedef struct {
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u8 magic[8]; // "DISA" 0x00040000
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u32 n_partitions;
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u8 padding0[4];
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u64 offset_table1;
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u64 offset_table0;
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u64 size_table;
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u64 offset_descA;
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u64 size_descA;
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u64 offset_descB;
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u64 size_descB;
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u64 offset_partitionA;
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u64 size_partitionA;
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u64 offset_partitionB;
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u64 size_partitionB;
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u8 active_table; // 0 or 1
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u8 padding1[3];
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u8 hash_table[0x20]; // for the active table
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u8 unused[0x74];
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} __attribute__((packed)) DisaHeader;
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typedef struct {
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u8 magic[8]; // "DIFF" 0x00030000
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u64 offset_table1; // also desc offset
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u64 offset_table0; // also desc offset
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u64 size_table; // includes desc size
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u64 offset_partition;
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u64 size_partition;
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u32 active_table; // 0 or 1
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u8 hash_table[0x20]; // for the active table
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u64 unique_id; // see: http://3dbrew.org/wiki/Extdata
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u8 unused[0xA4];
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} __attribute__((packed)) DiffHeader;
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typedef struct {
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u8 magic[8]; // "DIFI" 0x00010000
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u64 offset_ivfc; // always 0x44
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u64 size_ivfc; // always 0x78
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u64 offset_dpfs; // always 0xBC
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u64 size_dpfs; // always 0x50
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u64 offset_hash; // always 0x10C
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u64 size_hash; // may include padding
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u8 ivfc_use_extlvl4;
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u8 dpfs_lvl1_selector;
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u8 padding[2];
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u64 ivfc_offset_extlvl4;
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} __attribute__((packed)) DifiHeader;
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typedef struct {
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u8 magic[8]; // "IVFC" 0x00020000
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u64 size_hash; // same as the one in DIFI, may include padding
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u64 offset_lvl1;
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u64 size_lvl1;
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u32 log_lvl1;
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u8 padding0[4];
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u64 offset_lvl2;
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u64 size_lvl2;
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u32 log_lvl2;
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u8 padding1[4];
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u64 offset_lvl3;
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u64 size_lvl3;
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u32 log_lvl3;
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u8 padding2[4];
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u64 offset_lvl4;
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u64 size_lvl4;
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u64 log_lvl4;
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u64 size_ivfc; // 0x78
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} __attribute__((packed)) IvfcDescriptor;
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typedef struct {
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u8 magic[8]; // "DPFS" 0x00010000
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u64 offset_lvl1;
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u64 size_lvl1;
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u32 log_lvl1;
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u8 padding0[4];
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u64 offset_lvl2;
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u64 size_lvl2;
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u32 log_lvl2;
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u8 padding1[4];
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u64 offset_lvl3;
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u64 size_lvl3;
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u32 log_lvl3;
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u8 padding2[4];
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} __attribute__((packed)) DpfsDescriptor;
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typedef struct {
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DifiHeader difi;
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IvfcDescriptor ivfc;
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DpfsDescriptor dpfs;
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u8 hash[0x20];
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u8 padding[4]; // all zeroes when encrypted
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} __attribute__((packed)) DifiStruct;
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// condensed info to enable reading IVFC lvl4
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typedef struct {
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u32 offset_dpfs_lvl1; // relative to start of file
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u32 offset_dpfs_lvl2; // relative to start of file
|
||||
u32 offset_dpfs_lvl3; // relative to start of file
|
||||
u32 size_dpfs_lvl1;
|
||||
u32 size_dpfs_lvl2;
|
||||
u32 size_dpfs_lvl3;
|
||||
u32 log_dpfs_lvl2;
|
||||
u32 log_dpfs_lvl3;
|
||||
u32 offset_ivfc_lvl4; // relative to DPFS lvl3 if not external
|
||||
u32 size_ivfc_lvl4;
|
||||
u8 dpfs_lvl1_selector;
|
||||
u8 ivfc_use_extlvl4;
|
||||
u8* dpfs_lvl2_cache; // optional, NULL when unused
|
||||
} __attribute__((packed)) DisaDiffReaderInfo;
|
||||
|
||||
u32 GetDisaDiffReaderInfo(const char* path, DisaDiffReaderInfo* info, bool partitionB);
|
||||
u32 BuildDisaDiffDpfsLvl2Cache(const char* path, DisaDiffReaderInfo* info, u8* cache, u32 cache_size);
|
||||
u32 ReadDisaDiffIvfcLvl4(const char* path, DisaDiffReaderInfo* info, u32 offset, u32 size, void* buffer);
|
||||
@ -1,29 +0,0 @@
|
||||
@MainMenu
|
||||
labelsel -s -o "Main Menu" MainMenu_*
|
||||
goto MainMenu
|
||||
|
||||
@MainMenu_Option1
|
||||
labelsel -s -o "Option 1 Sub-Menu" MainMenu_Option1_*
|
||||
goto MainMenu
|
||||
|
||||
@MainMenu_Option1_A
|
||||
echo "This is Option 1 A"
|
||||
goto MainMenu_Option1
|
||||
|
||||
@MainMenu_Option1_B
|
||||
echo "This is Option 1 B"
|
||||
goto MainMenu_Option1
|
||||
|
||||
@MainMenu_Option2
|
||||
echo "This is Option 2"
|
||||
goto MainMenu
|
||||
|
||||
@MainMenu_Option3
|
||||
echo "This is Option 3"
|
||||
goto MainMenu
|
||||
|
||||
@MainMenu_Reboot
|
||||
reboot
|
||||
|
||||
@MainMenu_Shutdown
|
||||
poweroff
|
||||
Loading…
x
Reference in New Issue
Block a user