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author Aaron Giles <aaron@aarongiles.com>2008-09-04 08:48:57 +0000
committer Aaron Giles <aaron@aarongiles.com>2008-09-04 08:48:57 +0000
commitc1f0164f5d02bf60dce10b58503bd2fea2cec951 (patch)
tree0eaf4f47edbf064bd53df0359274e409a09d9b45 /src/emu/machine/ldcore.h
parentb660cc0f7024b0ed063fd4b6d5e928e12ec08a81 (diff)
Split core laserdisc functionality into separate file ldcore.c.
Each player now gets its own source file, along with new hooks which enable more precise control over the behavior. Updated the PR-8210 and LD-V1000 implementations to the new spec. Other players will come online shortly. Changed scan behavior so that it requires a constant stream of signals to continue scanning. Updated ldplayer accordingly.
Diffstat (limited to 'src/emu/machine/ldcore.h')
-rw-r--r--src/emu/machine/ldcore.h247
1 files changed, 247 insertions, 0 deletions
diff --git a/src/emu/machine/ldcore.h b/src/emu/machine/ldcore.h
new file mode 100644
index 00000000000..74b912212ea
--- /dev/null
+++ b/src/emu/machine/ldcore.h
@@ -0,0 +1,247 @@
+/*************************************************************************
+
+ ldcore.h
+
+ Private core laserdisc player implementation.
+
+ Copyright Nicola Salmoria and the MAME Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+*************************************************************************/
+
+#pragma once
+
+#ifndef __LDCORE_H__
+#define __LDCORE_H__
+
+#include "driver.h"
+#include "laserdsc.h"
+#include "vbiparse.h"
+
+
+/***************************************************************************
+ CONSTANTS
+***************************************************************************/
+
+/* common laserdisc states */
+enum
+{
+ LDSTATE_NONE, /* unspecified state */
+ LDSTATE_EJECTING, /* in the process of ejecting */
+ LDSTATE_EJECTED, /* fully ejected */
+ LDSTATE_PARKED, /* head parked in lead-in */
+ LDSTATE_LOADING, /* loading from ejected state */
+ LDSTATE_SPINUP, /* spinning up */
+ LDSTATE_PAUSING, /* looking for a frame boundary to pause */
+ LDSTATE_PAUSED, /* found a frame boundary; now paused */
+ /* parameter specifies the fieldnum of the first frame */
+ LDSTATE_PLAYING, /* playing forward normally, with audio */
+ /* parameter specifies the target frame, or 0 if none */
+ LDSTATE_PLAYING_SLOW_REVERSE, /* playing slow in the reverse direction, with no audio */
+ /* parameter specifies the number of times to repeat each track */
+ LDSTATE_PLAYING_SLOW_FORWARD, /* playing slow in the forward direction, with no audio */
+ /* parameter specifies the number of times to repeat each track */
+ LDSTATE_PLAYING_FAST_REVERSE, /* playing fast in the reverse direction, with no audio */
+ /* parameter specifies the number of frames to skip backwards after each frame */
+ LDSTATE_PLAYING_FAST_FORWARD, /* playing fast in the forward direction, with no audio */
+ /* parameter specifies the number of frames to skip forwards after each frame */
+ LDSTATE_STEPPING_REVERSE, /* single frame stepping in the reverse direction */
+ LDSTATE_STEPPING_FORWARD, /* single frame stepping in the forward direction */
+ LDSTATE_SCANNING, /* scanning in the forward or reverse direction */
+ /* parameter(0:7) controls how many vsyncs until revert to savestate */
+ /* parameter(8:31) specifies the speed */
+ LDSTATE_SEEKING, /* seeking to a specific frame */
+ /* parameter specifies the target frame */
+ LDSTATE_OTHER /* other states start here */
+};
+
+/* special frame and chapter numbers from VBI conversion */
+#define FRAME_NOT_PRESENT -2 /* no frame number information present */
+#define FRAME_LEAD_IN -1 /* lead-in code detected */
+#define FRAME_LEAD_OUT 99999 /* lead-out code detected */
+#define CHAPTER_NOT_PRESENT -2 /* no chapter number information present */
+#define CHAPTER_LEAD_IN -1 /* lead-in code detected */
+#define CHAPTER_LEAD_OUT 100 /* lead-out code detected */
+
+/* generic head movement speeds; use player-specific information where appropriate */
+#define GENERIC_SLOW_SPEED (5) /* 1/5 normal speed */
+#define GENERIC_FAST_SPEED (3) /* 3x normal speed */
+#define GENERIC_SCAN_SPEED (50) /* 50x normal speed */
+#define GENERIC_SEARCH_SPEED (5000) /* 5000x normal speed */
+
+/* generic timings; use player-specific information where appropriate */
+#define GENERIC_EJECT_TIME (ATTOTIME_IN_SEC(5))
+#define GENERIC_SPINUP_TIME (ATTOTIME_IN_SEC(2))
+#define GENERIC_LOAD_TIME (ATTOTIME_IN_SEC(5))
+
+
+
+/***************************************************************************
+ MACROS
+***************************************************************************/
+
+#define SCANNING_PARAM(speed,duration) (((speed) << 8) | ((duration) & 0xff))
+
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+/* core-specific and player-specific data */
+typedef struct _ldplayer_data ldplayer_data;
+typedef struct _ldcore_data ldcore_data;
+
+
+/* player state */
+typedef struct _ldplayer_state ldplayer_state;
+struct _ldplayer_state
+{
+ UINT8 state; /* current state */
+ INT32 substate; /* internal sub-state; starts at 0 on any state change */
+ INT32 param; /* parameter for current state */
+ attotime endtime; /* minimum ending time for current state */
+};
+
+
+/* generic data */
+typedef struct _laserdisc_state laserdisc_state;
+struct _laserdisc_state
+{
+ const device_config * device; /* pointer to owning device */
+ ldcore_data * core; /* private core data */
+ ldplayer_data * player; /* private player data */
+
+ ldplayer_state state; /* active state */
+ ldplayer_state savestate; /* saved state during temporary operations */
+};
+
+
+/* player-specific callbacks */
+typedef void (*laserdisc_init_func)(laserdisc_state *ld);
+typedef INT32 (*laserdisc_update_func)(laserdisc_state *ld, const vbi_metadata *vbi, int fieldnum, attotime curtime);
+typedef void (*laserdisc_w_func)(laserdisc_state *ld, UINT8 prev, UINT8 new);
+typedef UINT8 (*laserdisc_r_func)(laserdisc_state *ld);
+
+
+/* player configuration */
+typedef struct _ldplayer_interface ldplayer_interface;
+struct _ldplayer_interface
+{
+ int type; /* type of the player */
+ size_t statesize; /* size of the state */
+ const char * name; /* name of the player */
+ laserdisc_init_func init; /* initialization callback */
+ laserdisc_update_func update; /* update callback */
+ laserdisc_w_func writedata; /* parallel data write */
+ laserdisc_w_func writeline[LASERDISC_INPUT_LINES]; /* single line write */
+ laserdisc_r_func readdata; /* parallel data read */
+ laserdisc_r_func readline[LASERDISC_OUTPUT_LINES]; /* single line read */
+};
+
+
+
+/***************************************************************************
+ GLOBAL VARIABLES
+***************************************************************************/
+
+/* defined by each player */
+extern const ldplayer_interface pr7820_interface;
+extern const ldplayer_interface pr8210_interface;
+extern const ldplayer_interface simutrek_interface;
+extern const ldplayer_interface ldv1000_interface;
+extern const ldplayer_interface ldp1450_interface;
+extern const ldplayer_interface vp932_interface;
+
+
+
+/***************************************************************************
+ FUNCTION PROTOTYPES
+***************************************************************************/
+
+
+/* ----- player interface ----- */
+
+/* return a token with type checking from a device */
+laserdisc_state *ldcore_get_safe_token(const device_config *device);
+
+/* set the left/right audio squelch states */
+void ldcore_set_audio_squelch(laserdisc_state *ld, UINT8 squelchleft, UINT8 squelchright);
+
+/* set the video squelch state */
+void ldcore_set_video_squelch(laserdisc_state *ld, UINT8 squelch);
+
+
+
+/* ----- generic implementations ----- */
+
+/* generically update in a way that works for most situations */
+INT32 ldcore_generic_update(laserdisc_state *ld, const vbi_metadata *vbi, int fieldnum, attotime curtime, ldplayer_state *curstate);
+
+
+
+/***************************************************************************
+ INLINE FUNCTIONS
+***************************************************************************/
+
+/*-------------------------------------------------
+ is_start_of_frame - return TRUE if this is
+ the start of a frame
+-------------------------------------------------*/
+
+INLINE int is_start_of_frame(const vbi_metadata *vbi)
+{
+ /* is it not known if the white flag or the presence of a frame code
+ determines the start of frame; the former seems to be the "official"
+ way, but the latter seems to be the practical implementation */
+ return (vbi->white || (vbi->line1718 & 0xf80000) == 0xf80000);
+}
+
+
+/*-------------------------------------------------
+ frame_from_metadata - return the frame number
+ encoded in the metadata, if present, or
+ FRAME_NOT_PRESENT
+-------------------------------------------------*/
+
+INLINE int frame_from_metadata(const vbi_metadata *metadata)
+{
+ UINT32 data;
+
+ if ((metadata->line1718 & 0xf80000) == 0xf80000)
+ data = metadata->line1718 & 0x7ffff;
+ else if (metadata->line1718 == 0x88ffff)
+ return FRAME_LEAD_IN;
+ else if (metadata->line1718 == 0x80eeee)
+ return FRAME_LEAD_OUT;
+ else
+ return FRAME_NOT_PRESENT;
+
+ return (((data >> 16) & 0x0f) * 10000) + (((data >> 12) & 0x0f) * 1000) + (((data >> 8) & 0x0f) * 100) + (((data >> 4) & 0x0f) * 10) + (data & 0x0f);
+}
+
+
+/*-------------------------------------------------
+ chapter_from_metadata - return the chapter
+ number encoded in the metadata, if present,
+ or CHAPTER_NOT_PRESENT
+-------------------------------------------------*/
+
+INLINE int chapter_from_metadata(const vbi_metadata *metadata)
+{
+ UINT32 data;
+
+ if ((metadata->line1718 & 0xf00fff) == 0x800ddd)
+ data = metadata->line1718 & 0x7f000;
+ else if (metadata->line1718 == 0x88ffff)
+ return CHAPTER_LEAD_IN;
+ else if (metadata->line1718 == 0x80eeee)
+ return CHAPTER_LEAD_OUT;
+ else
+ return CHAPTER_NOT_PRESENT;
+
+ return (((data >> 16) & 0x0f) * 10) + ((data >> 12) & 0x0f);
+}
+
+
+#endif