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PSX: match user_io buffer size to chd hunk size

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This commit is contained in:
Zakk
2024-03-12 19:53:45 -04:00
parent 3a0d20577e
commit 9d7f739e34
3 changed files with 17 additions and 0 deletions
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9
support/psx/psx.cpp
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@@ -467,6 +467,15 @@ void psx_fill_blanksave(uint8_t *buffer, uint32_t lba, int cnt)
static toc_t toc = {};
#define CD_SECTOR_LEN 2352
int psx_chd_hunksize()
{
if (toc.chd_f)
return toc.chd_hunksize;
return 0;
}
void psx_read_cd(uint8_t *buffer, int lba, int cnt)
{
//printf("req lba=%d, cnt=%d\n", lba, cnt);

1
support/psx/psx.h
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@@ -4,6 +4,7 @@
void psx_mount_cd(int f_index, int s_index, const char *filename);
void psx_fill_blanksave(uint8_t *buffer, uint32_t lba, int cnt);
void psx_read_cd(uint8_t *buffer, int lba, int cnt);
int psx_chd_hunksize();
const char* psx_get_game_id();
void psx_poll();

7
user_io.cpp
View File

@@ -3118,6 +3118,13 @@ void user_io_poll()
else if (op & 1)
{
uint32_t buf_n = sizeof(buffer[0]) / blksz;
int psx_blksz = 0;
if (is_psx() && blksz == 2352)
{
//returns 0 if the mounted disk is not a chd, otherwise returns the chd hunksize in bytes
psx_blksz = psx_chd_hunksize();
if (psx_blksz && psx_blksz <= sizeof(buffer[0])) buf_n = psx_blksz / blksz;
}
//printf("SD RD (%llu,%d) on %d, WIDE=%d\n", lba, blksz, disk, fio_size);
int done = 0;