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added support for loading mode1 2336/2352 and mode2 2352 tracks from cdi discs

This commit is contained in:
Anthony Pesch 2017-11-15 17:40:59 -05:00
parent 796b7a2dca
commit 2dacdc0607
1 changed files with 53 additions and 42 deletions
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95
src/guest/gdrom/cdi.c
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@ -13,15 +13,9 @@ static const char *cdi_version_names[] = {
"2", "3", "3.5",
};
static const int cdi_sector_sizes[] = {2048, 2336, 2352};
static const int cdi_sectors[] = {2048, 2336, 2352};
static const int cdi_sector_formats[] = {
GD_SECTOR_CDDA, 0, GD_SECTOR_M2F1,
};
static const char *cdi_modes[] = {
"CDDA", "???", "M2F1",
};
static const char *cdi_modes[] = {"CDDA", "MODE1", "MODE2"};
static const uint8_t cdi_start_mark[] = {0, 0, 1, 0, 0, 0, 255, 255, 255, 255};
@ -151,11 +145,11 @@ static int cdi_parse_track(struct disc *disc, uint32_t version,
}
/* parse track info */
uint32_t pregap_length, track_length, mode, lba, total_length, sector_type;
uint32_t pregap_len, track_len, mode, lba, total_len, sector_type;
fseek(fp, 2, SEEK_CUR);
r = fread(&pregap_length, 4, 1, fp);
r = fread(&pregap_len, 4, 1, fp);
CHECK_EQ(r, 1);
r = fread(&track_length, 4, 1, fp);
r = fread(&track_len, 4, 1, fp);
CHECK_EQ(r, 1);
fseek(fp, 6, SEEK_CUR);
r = fread(&mode, 4, 1, fp);
@ -163,58 +157,75 @@ static int cdi_parse_track(struct disc *disc, uint32_t version,
fseek(fp, 12, SEEK_CUR);
r = fread(&lba, 4, 1, fp);
CHECK_EQ(r, 1);
r = fread(&total_length, 4, 1, fp);
r = fread(&total_len, 4, 1, fp);
CHECK_EQ(r, 1);
fseek(fp, 16, SEEK_CUR);
r = fread(&sector_type, 4, 1, fp);
CHECK_EQ(r, 1);
if (total_length != (pregap_length + track_length)) {
if (total_len != (pregap_len + track_len)) {
LOG_WARNING("cdi_parse track length is invalid");
return 0;
}
if (mode != 0 && mode != 2) {
LOG_WARNING("cdi_parse unsupported track mode %d", mode);
return 0;
}
if (sector_type >= ARRAY_SIZE(cdi_sector_sizes)) {
if (sector_type >= ARRAY_SIZE(cdi_sectors)) {
LOG_WARNING("cdi_parse unsupported sector type 0x%x", sector_type);
return 0;
}
int sector_fmt = cdi_sector_formats[mode];
int sector_size = cdi_sector_sizes[sector_type];
int data_offset = *track_offset + pregap_length * sector_size;
int sector_size = cdi_sectors[sector_type];
int data_offset = *track_offset + pregap_len * sector_size;
track->fad = pregap_length + lba;
track->fad = pregap_len + lba;
track->adr = 0;
track->ctrl = sector_fmt == GD_SECTOR_CDDA ? 0 : 4;
track->sector_fmt = cdi_sector_formats[mode];
track->sector_size = sector_size;
switch (track->sector_fmt) {
case GD_SECTOR_CDDA:
track->header_size = 0;
track->error_size = 0;
track->data_size = 2352;
break;
case GD_SECTOR_M2F1:
track->header_size = 8;
track->error_size = 280;
track->data_size = 2048;
break;
default:
LOG_WARNING("cdi_parse unexpected sector format %d", track->sector_fmt);
return 0;
track->ctrl = mode == 0 ? 0 : 4;
if (mode == 0 && sector_size == 2352) {
track->sector_fmt = GD_SECTOR_CDDA;
track->header_size = 0;
track->error_size = 0;
track->data_size = 2352;
} else if (mode == 1 && sector_size == 2352) {
track->sector_fmt = GD_SECTOR_M1;
/* skip sync, header */
track->header_size = 16;
track->error_size = 288;
track->data_size = 2048;
} else if (mode == 1 && sector_size == 2336) {
track->sector_fmt = GD_SECTOR_M1;
track->header_size = 0;
track->error_size = 288;
track->data_size = 2048;
} else if (mode == 2 && sector_size == 2352) {
/* assume form1 */
track->sector_fmt = GD_SECTOR_M2F1;
/* skip sync, header and subheader */
track->header_size = 24;
track->error_size = 280;
track->data_size = 2048;
} else if (mode == 2 && sector_size == 2336) {
/* assume form1 */
track->sector_fmt = GD_SECTOR_M2F1;
/* skip subheader */
track->header_size = 8;
track->error_size = 280;
track->data_size = 2048;
} else {
LOG_WARNING("cdi_parse unexpected sector format %d / size %d",
track->sector_fmt, track->sector_size);
return 0;
}
track->sector_size = sector_size;
track->file_offset = data_offset - track->fad * track->sector_size;
/* sanity check the track layout */
CHECK_EQ(track->header_size + track->error_size + track->data_size,
track->sector_size);
LOG_INFO("cdi_parse_track track=%d fad=%d off=%d mode=%s/%d", track->num,
track->fad, data_offset, cdi_modes[mode], track->sector_size);
*track_offset += total_length * sector_size;
*leadout_fad = track->fad + track_length;
*track_offset += total_len * sector_size;
*leadout_fad = track->fad + track_len;
return 1;
}