cdriso: handle chd subchannels, when available

libretro/pcsx_rearmed#535
only raw mode tested

diff --git a/libpcsxcore/cdriso.c b/libpcsxcore/cdriso.c
index 2dcaf49..599e140 100644 (file)
--- a/libpcsxcore/cdriso.c
+++ b/libpcsxcore/cdriso.c
@@ -980,8 +980,16 @@ static int handlechd(const char *isofile) {
                else
                        break;
 
-               if(md.track == 1)
+               SysPrintf("chd: %s\n", meta);
+
+               if (md.track == 1) {
                        md.pregap = 150;
+                       if (!strncmp(md.subtype, "RW", 2)) {
+                               subChanMixed = TRUE;
+                               if (!strcmp(md.subtype, "RW_RAW"))
+                                       subChanRaw = TRUE;
+                       }
+               }
                else
                        sec2msf(msf2sec(ti[md.track-1].length) + md.pregap, ti[md.track-1].length);
 
@@ -1204,6 +1212,12 @@ static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
        if (dest != cdbuffer) // copy avoid HACK
                memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
                        CD_FRAMESIZE_RAW);
+       if (subChanMixed) {
+               memcpy(subbuffer, chd_img->buffer[chd_img->sector_in_hunk] + CD_FRAMESIZE_RAW,
+                       SUB_FRAMESIZE);
+               if (subChanRaw)
+                       DecodeRawSubData();
+       }
        return CD_FRAMESIZE_RAW;
 }
 #endif
@@ -1254,7 +1268,8 @@ static long CALLBACK ISOopen(void) {
        boolean isMode1ISO = FALSE;
        char alt_bin_filename[MAXPATHLEN];
        const char *bin_filename;
-       char image_str[1024] = {0};
+       char image_str[1024];
+       int is_chd = 0;
 
        if (cdHandle != NULL) {
                return 0; // it's already open
@@ -1267,7 +1282,8 @@ static long CALLBACK ISOopen(void) {
                return -1;
        }
 
-       sprintf(image_str, "Loaded CD Image: %s", GetIsoFile());
+       snprintf(image_str, sizeof(image_str) - 6*4 - 1,
+               "Loaded CD Image: %s", GetIsoFile());
 
        cddaBigEndian = FALSE;
        subChanMixed = FALSE;
@@ -1306,6 +1322,7 @@ static long CALLBACK ISOopen(void) {
                strcat(image_str, "[+chd]");
                CDR_getBuffer = ISOgetBuffer_chd;
                cdimg_read_func = cdread_chd;
+               is_chd = 1;
        }
 #endif
 
@@ -1366,7 +1383,7 @@ static long CALLBACK ISOopen(void) {
 
        PrintTracks();
 
-       if (subChanMixed)
+       if (subChanMixed && !is_chd)
                cdimg_read_func = cdread_sub_mixed;
        else if (isMode1ISO)
                cdimg_read_func = cdread_2048;