podsa.c

来自「一个不错的硬盘播放器程序,包含VFD显示程序,红外线遥控程序,硬盘读写程序,及解」· C语言 代码 · 共 176 行

/* Copyright 1996, ESS Technology, Inc.					*/
/* SCCSID @(#)podsa.c	1.23 12/12/97 */

/* 
 * This is based on version 1.74 of 3204 code.
 */

/*
 * $Log$
 */

#include "common.h"
#include "digest.h"
#include "display.h"
#include "sysinfo.h"
#include "ioport.h"
#include "tact.h"
#include "tdm.h"
#include "timedef.h"
#include "util.h"
#include "vcxi.h"
#include "xport.h"
#ifdef BILINGUAL_OSD
#include "font.h"
#endif

/************************************************************************
 * Variables of local interest.						*
 ************************************************************************/
PRIVATE	char	power_up = 1;	/* Reset after the first execution.	*/

/************************************************************************
 * Global variables.							*
 ************************************************************************/
char		audioLevel = 16;/* 16 is normal; range is [16..0]	*/
unsigned int	clearIgnoreTime = 0xffffffff;/* Time to clear ignoreTDM.*/
unsigned int	clearPauseTime = 0xffffffff;/* Time to deassert pause	*/
unsigned int	clearSkipTime = 0xffffffff; /* Time to deassert 	*
				 * "skip track" signal.			*/
#ifdef LATER
volatile char	changeVideoType = 0; /* Video type has been changed.	*/
unsigned int	delaySkipAmount = HALF_SECOND; /* When sending a signal	*
				 * in respond to a user input, always	*
				 * delay by .5 second so the external	*
				 * micro controller will not get	*
				 * confused. Duration is measure by	*
				 * number of video interrupts (different*
				 * for PAL/NTSC)			*/
char		digestBackground = COLOR_BLUE;
				/* Back ground color for digest		*/
#endif
char		digestPause = 0;/* Pausing in the middle of digesting	*/
char		disableOsd = 0;	/* When set to 1, clear vcx_osd_on	*/
char		displayLogo = 0;/* Flag to tell service_dsa to show	*
				 * the company logo (for audio CD)	*/
char		encSelMode;	/* Encoder selection, can have 3 	*
				 * values: PAL, NTSC, AUTO.		*/
char		end_of_track;	/* Inc. when it is end of a track (EOF	*
				 * in CD's header). User is responsible	*
				 * for cleaning it.			*/
char		foundVCDversion = 0; /* Set to 1 if we just found the	*
				 * VCD version from 0:4:0		*/
unsigned char	ignoreTDM = 0;	/* Ignore TDM input (end of digest)	*/
char		ignoreTimeOut = 0;/* If we send pause, then we want to	*
				 * ignore time out in most cases.	*/
char		inDigestShadow = 0; /* In the shadow of digest (i.e.	*
				 * screen still showing digest. In which*
				 * case, digest key will quit instead	*
				 * of entering another digest.		*/
char		jumperAuto; 	/* Auto detect NTSC/PAL?		*/
int		keepStillType = 0xe2;	/* Still picture to display	*/
char		keepVideoType;	/* TDM data type to keep		*/
char		msgVCD[] = "VIDEO CD    "; /* Video CD message		*/
#ifdef BILINGUAL_OSD
char		c_msgVCD[] = { CN_YING3, ' ', CN_YIN1,
			       ' ', 'C', 'D', ' ', ' ', ' ', ' ' };
#endif
char		muteAudio = 0;	/* Don't mute				*/
#ifdef LATER
int		newVideoAddr;	/* Pointer to system buffer when we	*
				 * have a new video data type.		*/
#endif
char		nextNplay = 0;	/* If 1, then "next" key can lead to 	*
				 * play and "next" key is pressed.	*/
char		osdSelect = 0;	/* OSD the "select" string.		*/
char		pbcON = 1;	/* Play track 1 of 2.0 disk.		*/
unsigned int	pauseWidth = QUARTER_SECOND;/* Pulse width for pause signal*
				 * (~1/8 sec.) Duration is measure by	*
				 * number of video interrupt. The high	*
				 * word is number of PAL interrupt while*
				 * the low word is number of NTSC intr.	*/
int		playMode = MODE_NORMAL; /* Current play mode		*/
int		prevVertSz;	/* "Previous" vcx_VertSz (i.e. this	*
				 * var is used to keep track of disk	*
				 * change so we can set the TV encoder	*
				 * accordingly.				*/
char		scanMode = 0;	/* 0: normal; 1: I-frame only; 2: digest*/
char		showCDtype = 1;	/* Show the CD type with OSD		*/
char		skipPauseOsd = 0;/* Skip the "PAUSE" OSD if we are	*
				 * sending the pause signal		*/
char		skipTk1;	/* 0: don't skip 1: do skip still (tk1)	*/
unsigned int	skipWidth = QUARTER_SECOND;/* Pulse width for skip signal	*
				 * (~1/8 sec). Measured by number of	*
				 * video interrupts.			*/
unsigned int	subDigestEndTime; /* Latest time when a sub digest	*
				 * screen shall end.			*/
volatile char	tdmStopCopy = 0;/* Stop copying when pausing to fix	*
				 * problem with Jiang Hai loader.	*/
unsigned short	vcdVersion = 0x3131; /* VCD version number from CD;	*
				 * power-up default is 1.1 disk		*/
char		viewTrack = 0;	/* Similar to digest, but there is	*
				 * no jump (i.e. "TRACK VIEW")		*/
#if (P1O || P2O)
unsigned int	whenDelayPlay = 0xffffffff; /* When to send a delayed	*
				 * play signal				*/
unsigned int	whenDelaySkip = 0xffffffff; /* When to send a delayed	*
				 * skip signal				*/
#endif

#ifdef IR
unsigned int	resend_delay = THREE_SECOND; /* Delay before resend IR	*
				 * in digest.				*/
#endif

/*
 * "service_dsa" for the play-only machine. This routine will NOT be
 * controlling DSA. Instead, it will do OSD, logo update, and monitoring
 * of different switches.
 */
void service_dsa(safe)
int safe;
{
    if (power_up) {
	int tmp1;
	tmp1 = ((vcx_VertSz == 240) || (vcx_VertSz == 480)) ? 240 : 288;
	keepVideoType = vcx_user_video_stream;
	prevVertSz = tmp1;
	power_up = 0;
    } 

    /* Time to clear skip track */
    if (glbTimer >= clearSkipTime) {	
	PO_RELEASE_SKIP;	/* Release the signal	*/
	clearSkipTime = 0xffffffff;
    }

    /* Time to clear pause signal */
    if (glbTimer >= clearPauseTime) {	
	PO_RELEASE_PAUSE;	/* Release the signal	*/
	clearPauseTime = 0xffffffff;
    }

    if (glbTimer >= clearIgnoreTime) {
	/* 20 seconds after 18 digest frames				*/
	ignoreTDM = 0;			/* Start to play again.		*/
	clearIgnoreTime = 0xffffffff;
	showDarkBframe();		/* Ensure a clean transition	*/
	/* Playing audio CD or no data, then show logo. */
	if (TDM_isCDDA || !XPORT_active) displayLogo = 1;
    }

    /*
     * In digest, the key response is very sluggish because we
     * are always unsafe. Therefore, we'll force key to be processed
     * even if it is not safe.
     */
#if 0
    if (!safe && !vcx_digest) return;
#endif

    /* Go to ROM for the non-time-critical services */
    slowServices();
}