diff options
Diffstat (limited to 'deps/libchdr/cdrom.h')
| -rw-r--r-- | deps/libchdr/cdrom.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/deps/libchdr/cdrom.h b/deps/libchdr/cdrom.h new file mode 100644 index 0000000..8a3341c --- /dev/null +++ b/deps/libchdr/cdrom.h @@ -0,0 +1,107 @@ +// license:BSD-3-Clause
+// copyright-holders:Aaron Giles
+/***************************************************************************
+
+ cdrom.h
+
+ Generic MAME cd-rom implementation
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __CDROM_H__
+#define __CDROM_H__
+
+#include <stdint.h>
+
+
+/***************************************************************************
+ CONSTANTS
+***************************************************************************/
+
+// tracks are padded to a multiple of this many frames
+extern const uint32_t CD_TRACK_PADDING;
+
+#define CD_MAX_TRACKS (99) /* AFAIK the theoretical limit */
+#define CD_MAX_SECTOR_DATA (2352)
+#define CD_MAX_SUBCODE_DATA (96)
+
+#define CD_FRAME_SIZE (CD_MAX_SECTOR_DATA + CD_MAX_SUBCODE_DATA)
+#define CD_FRAMES_PER_HUNK (8)
+
+#define CD_METADATA_WORDS (1+(CD_MAX_TRACKS * 6))
+
+enum
+{
+ CD_TRACK_MODE1 = 0, /* mode 1 2048 bytes/sector */
+ CD_TRACK_MODE1_RAW, /* mode 1 2352 bytes/sector */
+ CD_TRACK_MODE2, /* mode 2 2336 bytes/sector */
+ CD_TRACK_MODE2_FORM1, /* mode 2 2048 bytes/sector */
+ CD_TRACK_MODE2_FORM2, /* mode 2 2324 bytes/sector */
+ CD_TRACK_MODE2_FORM_MIX, /* mode 2 2336 bytes/sector */
+ CD_TRACK_MODE2_RAW, /* mode 2 2352 bytes / sector */
+ CD_TRACK_AUDIO, /* redbook audio track 2352 bytes/sector (588 samples) */
+
+ CD_TRACK_RAW_DONTCARE /* special flag for cdrom_read_data: just return me whatever is there */
+};
+
+enum
+{
+ CD_SUB_NORMAL = 0, /* "cooked" 96 bytes per sector */
+ CD_SUB_RAW, /* raw uninterleaved 96 bytes per sector */
+ CD_SUB_NONE /* no subcode data stored */
+};
+
+#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
+
+/***************************************************************************
+ FUNCTION PROTOTYPES
+***************************************************************************/
+
+// ECC utilities
+int ecc_verify(const uint8_t *sector);
+void ecc_generate(uint8_t *sector);
+void ecc_clear(uint8_t *sector);
+
+
+
+/***************************************************************************
+ INLINE FUNCTIONS
+***************************************************************************/
+
+static inline uint32_t msf_to_lba(uint32_t msf)
+{
+ return ( ((msf&0x00ff0000)>>16) * 60 * 75) + (((msf&0x0000ff00)>>8) * 75) + ((msf&0x000000ff)>>0);
+}
+
+static inline uint32_t lba_to_msf(uint32_t lba)
+{
+ uint8_t m, s, f;
+
+ m = lba / (60 * 75);
+ lba -= m * (60 * 75);
+ s = lba / 75;
+ f = lba % 75;
+
+ return ((m / 10) << 20) | ((m % 10) << 16) |
+ ((s / 10) << 12) | ((s % 10) << 8) |
+ ((f / 10) << 4) | ((f % 10) << 0);
+}
+
+// segacd needs it like this.. investigate
+// Angelo also says PCE tracks often start playing at the
+// wrong address.. related?
+static inline uint32_t lba_to_msf_alt(int lba)
+{
+ uint32_t ret = 0;
+
+ ret |= ((lba / (60 * 75))&0xff)<<16;
+ ret |= (((lba / 75) % 60)&0xff)<<8;
+ ret |= ((lba % 75)&0xff)<<0;
+
+ return ret;
+}
+
+#endif // __CDROM_H__
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