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core, groundwork for chd support

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still needs some scrutiny, and build integration is missing
This commit is contained in:
kub 2021-03-04 20:48:02 +01:00
parent 4da84f9454
commit 15ca715228
18 changed files with 411 additions and 100 deletions
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39
pico/media.c
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@ -8,7 +8,7 @@
#include <string.h>
#include "pico_int.h"
#include "cd/cue.h"
#include "cd/cd_parse.h"
unsigned char media_id_header[0x100];
@ -49,7 +49,7 @@ static int detect_media(const char *fname)
return PM_BAD_DETECT;
/* don't believe in extensions, except .cue */
if (strcasecmp(ext, ".cue") == 0)
if (strcasecmp(ext, ".cue") == 0 || strcasecmp(ext, ".chd") == 0)
return PM_CD;
pmf = pm_open(fname);
@ -129,26 +129,31 @@ int PicoCdCheck(const char *fname_in, int *pregion)
pm_file *cd_f;
int region = 4; // 1: Japan, 4: US, 8: Europe
char ext[5];
cue_track_type type = CT_UNKNOWN;
cue_data_t *cue_data = NULL;
enum cd_track_type type = CT_UNKNOWN;
cd_data_t *cd_data = NULL;
// opens a cue, or searches for one
cue_data = cue_parse(fname_in);
if (cue_data != NULL) {
fname = cue_data->tracks[1].fname;
type = cue_data->tracks[1].type;
}
else {
if (!cd_data && (cd_data = cue_parse(fname_in)) == NULL) {
get_ext(fname_in, ext);
if (strcasecmp(ext, ".cue") == 0)
return -1;
}
// opens a chd
if (!cd_data && (cd_data = chd_parse(fname_in)) == NULL) {
get_ext(fname_in, ext);
if (strcasecmp(ext, ".chd") == 0)
return -1;
}
if (cd_data != NULL) {
// 1st track contains the code
fname = cd_data->tracks[1].fname;
type = cd_data->tracks[1].type;
}
cd_f = pm_open(fname);
if (cue_data != NULL)
cue_destroy(cue_data);
if (cd_f == NULL) return 0; // let the upper level handle this
cdparse_destroy(cd_data);
if (cd_f == NULL) return CT_UNKNOWN; // let the upper level handle this
if (pm_read(buf, 32, cd_f) != 32) {
pm_close(cd_f);
@ -198,7 +203,7 @@ enum media_type_e PicoLoadMedia(const char *filename,
{
const char *rom_fname = filename;
enum media_type_e media_type;
enum cd_img_type cd_img_type = CIT_NOT_CD;
enum cd_track_type cd_img_type = CT_UNKNOWN;
unsigned char *rom_data = NULL;
unsigned int rom_size = 0;
pm_file *rom = NULL;
@ -219,7 +224,7 @@ enum media_type_e PicoLoadMedia(const char *filename,
{
// check for MegaCD image
cd_img_type = PicoCdCheck(filename, &cd_region);
if ((int)cd_img_type >= 0 && cd_img_type != CIT_NOT_CD)
if ((int)cd_img_type >= 0 && cd_img_type != CT_UNKNOWN)
{
// valid CD image, ask frontend for BIOS..
rom_fname = NULL;
@ -290,7 +295,7 @@ enum media_type_e PicoLoadMedia(const char *filename,
Pico.m.ncart_in = 0;
// insert CD if it was detected
if (cd_img_type != CIT_NOT_CD) {
if (cd_img_type != CT_UNKNOWN) {
ret = cdd_load(filename, cd_img_type);
if (ret != 0) {
PicoCartUnload();