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dep/libchdr: Add subtype parsing functions

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This commit is contained in:
Stenzek 2023-11-05 20:36:07 +10:00
parent 738ede0c39
commit 82b3907804
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2 changed files with 46 additions and 9 deletions
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26
dep/libchdr/include/libchdr/cdrom.h
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@ -10,10 +10,12 @@
#pragma once #pragma once
#ifndef __CDROM_H__ #ifdef __cplusplus
#define __CDROM_H__ extern "C" {
#endif
#include <stdint.h> #include <stdint.h>
#include <stdbool.h>
#include <libchdr/chdconfig.h> #include <libchdr/chdconfig.h>
/*************************************************************************** /***************************************************************************
@ -47,11 +49,15 @@ enum
enum enum
{ {
CD_SUB_NORMAL = 0, /* "cooked" 96 bytes per sector */ CD_SUB_NONE = 0, /* no subcode data stored */
CD_SUB_RAW, /* raw uninterleaved 96 bytes per sector */ CD_SUB_RAW_INTERLEAVED, /* raw interleaved 96 bytes per sector */
CD_SUB_NONE /* no subcode data stored */ CD_SUB_RAW, /* raw non-interleaved 96 bytes per sector */
}; };
const char* cdrom_get_subtype_string(uint32_t subtype);
bool cdrom_parse_subtype_string(const char* typestring, uint32_t* subtype, uint32_t* subsize);
#define CD_FLAG_GDROM 0x00000001 /* disc is a GD-ROM, all tracks should be stored with GD-ROM metadata */ #define CD_FLAG_GDROM 0x00000001 /* disc is a GD-ROM, all tracks should be stored with GD-ROM metadata */
#define CD_FLAG_GDROMLE 0x00000002 /* legacy GD-ROM, with little-endian CDDA data */ #define CD_FLAG_GDROMLE 0x00000002 /* legacy GD-ROM, with little-endian CDDA data */
@ -81,10 +87,10 @@ static inline uint32_t lba_to_msf(uint32_t lba)
{ {
uint8_t m, s, f; uint8_t m, s, f;
m = lba / (60 * 75); m = (uint8_t)(lba / (60 * 75));
lba -= m * (60 * 75); lba -= m * (60 * 75);
s = lba / 75; s = (uint8_t)(lba / 75);
f = lba % 75; f = (uint8_t)(lba % 75);
return ((m / 10) << 20) | ((m % 10) << 16) | return ((m / 10) << 20) | ((m % 10) << 16) |
((s / 10) << 12) | ((s % 10) << 8) | ((s / 10) << 12) | ((s % 10) << 8) |
@ -107,4 +113,6 @@ static inline uint32_t lba_to_msf_alt(int lba)
return ret; return ret;
} }
#endif /* __CDROM_H__ */ #ifdef __cplusplus
} // extern "C"
#endif

29
dep/libchdr/src/libchdr_cdrom.c
View File

@ -20,6 +20,35 @@
#include <libchdr/cdrom.h> #include <libchdr/cdrom.h>
const char* cdrom_get_subtype_string(uint32_t subtype)
{
switch (subtype)
{
case CD_SUB_RAW: return "RW";
case CD_SUB_RAW_INTERLEAVED: return "RW_RAW";
default: return "NONE";
}
}
bool cdrom_parse_subtype_string(const char* typestring, uint32_t* subtype, uint32_t* subsize)
{
// https://github.com/mamedev/mame/blob/d2d54fb8ed53a2e86d308067da8414f85b5929b0/src/lib/util/cdrom.cpp#L767
if (!strcmp(typestring, "RW"))
{
*subtype = CD_SUB_RAW;
*subsize = 96;
return true;
}
else if (!strcmp(typestring, "RW_RAW"))
{
*subtype = CD_SUB_RAW_INTERLEAVED;
*subsize = 96;
return true;
}
return false;
}
#ifdef WANT_RAW_DATA_SECTOR #ifdef WANT_RAW_DATA_SECTOR
/*************************************************************************** /***************************************************************************