Source code upload

eoe/cmd/cdplayer/program.c

@@ -0,0 +1,210 @@
+/*
+ * 	program.c
+ *
+ * 	Description:
+ *		Routines to handle programming for CD-ROM audio
+ *
+ *	History:
+ *      rogerc      11/01/90    Created
+ */
+
+#include <sys/time.h>
+#include <X11/Intrinsic.h>
+#include <X11/StringDefs.h>
+#include <Xm/Xm.h>
+#include <Xm/PushB.h>
+#include <Xm/List.h>
+#include <Xm/BulletinB.h>
+#include <Xm/Label.h>
+#include <Xm/TextF.h>
+#include "cdaudio.h"
+#include "program.h"
+#include "database.h"
+
+#define DEBUG 1
+
+/*
+ *  int program_play( CDPLAYER *cdplayer, CDPROGRAM *program, int play )
+ *
+ *  Description:
+ *		Start playing program on cdplayer
+ *
+ *  Parameters:
+ *      cdplayer		cdplayer to play program on
+ *      program			program to play
+ *      play			1 to start playing, 0 to start paused
+ *
+ *  Returns:
+ *		non-zero if successful, 0 otherwise
+ */
+
+int program_play( CDPLAYER *cdplayer, CDPROGRAM *program, int play )
+{
+	program->active = 1;
+
+	return (CDplaytrack( cdplayer,
+	 program->tracks[program->current], play ));
+}
+
+/*
+ *  int program_next( CDPLAYER *cdplayer, CDPROGRAM *program )
+ *
+ *  Description:
+ *		Skips to the next track in the program, if we're not already on
+ *		the last.
+ *
+ *  Parameters:
+ *      cdplayer
+ *      program
+ *
+ *  Returns:
+ *		1 if skipped, 0 if we were already on last track
+ */
+
+int program_next( CDPLAYER *cdplayer, CDPROGRAM *program )
+{
+	if (program->current >= program->num_tracks - 1) {
+		program_stop( cdplayer, program );
+		return (0);
+	}
+
+	program->active = 1;
+	return (CDplaytrack( cdplayer,
+	 program->tracks[++(program->current)], 1 ));
+}
+
+/*
+ *  int program_rew_prev( CDPLAYER *cdplayer, CDPROGRAM *program, int quantum )
+ *
+ *  Description:
+ *		Support for the rewind function in program play mode.  Set back the
+ *		clock quantum seconds, going to the previous track in the program
+ *		if necessary
+ *
+ *  Parameters:
+ *      cdplayer
+ *      program
+ *      quantum			Number of seconds to skip back
+ *
+ *  Returns:
+ *		0 if we're at the beginning of the program or if CDplayabs() fails,
+ *		non-zero otherwise
+ */
+
+int program_rew_prev( CDPLAYER *cdplayer, CDPROGRAM *program, int quantum )
+{
+	int			min, sec, smin, ssec;
+	CDTRACKINFO	info;
+
+	if (program->current == 0) {
+		program_stop( cdplayer, program );
+		return (0);
+	}
+
+	program->active = 1;
+	if (!CDgettrackinfo( cdplayer, program->tracks[--(program->current)],
+	 &info ))
+		return (0);
+	sec = info.total_sec + info.total_min * 60 - quantum + info.start_min * 60
+	 + info.start_sec;
+	min = sec / 60;
+	sec %= 60;
+	return (CDplayabs( cdplayer, min, sec, 0, 1 ));
+}
+
+/*
+ *  int program_stop( CDPLAYER *cdplayer, CDPROGRAM *program )
+ *
+ *  Description:
+ *		Stops play of program
+ *
+ *  Parameters:
+ *      cdplayer
+ *      program
+ *
+ *  Returns:
+ *		Success or failure of CDstop()
+ */
+
+int program_stop( CDPLAYER *cdplayer, CDPROGRAM *program )
+{
+	program->active = 0;
+	program->current = 0;
+	return (CDstop( cdplayer ));
+}
+
+/*
+ *  CDPROGRAM *program_shuffle( CDPLAYER *cdplayer )
+ *
+ *  Description:
+ *		Creates a program consisting of all the tracks on the current
+ *		disc in random order.  Each track appears exactly once.
+ *
+ *  Parameters:
+ *      cdplayer
+ *
+ *  Returns:
+ *		A program of the tracks on the cd in random order
+ *		NULL if failure
+ */
+
+CDPROGRAM *program_shuffle( CDPLAYER *cdplayer )
+{
+	CDSTATUS		status;
+	CDPROGRAM		*program;
+	int				tracks_left, i, track, temp;
+	struct timeval	t;
+	struct timezone	tz;
+
+	CDgetstatus( cdplayer, &status );
+
+	if (status.state == CD_NODISC || status.state == CD_ERROR)
+		return (NULL);
+
+	program = (CDPROGRAM *)malloc( sizeof (*program) );
+
+	program->current = 0;
+	program->active = 0;
+	program->tracks = (int *)malloc( sizeof (int) *
+	 (status.last - status.first + 1) );
+	program->num_tracks = status.last - status.first + 1;
+
+	for (i = 0; i < program->num_tracks; i++)
+		program->tracks[i] = status.first + i;
+
+	if (0 == gettimeofday( &t, &tz ))
+		srandom( t.tv_usec );
+
+	for ((tracks_left = status.last - status.first + 1), (i = 0);
+	 tracks_left > 1; i++, tracks_left--) {
+		track = i + (random( ) % tracks_left);
+		temp = program->tracks[i];
+		program->tracks[i] = program->tracks[track];
+		program->tracks[track] = temp;
+	}
+	program->total_min = status.total_min;
+	program->total_sec = status.total_sec;
+
+	return (program);
+}
+
+/*
+ *  int free_program( CDPROGRAM *program )
+ *
+ *  Description:
+ *		Free all the memory used by program
+ *
+ *  Parameters:
+ *      program		program to free
+ *
+ *  Returns:
+ *		1
+ */
+
+int free_program( CDPROGRAM *program )
+{
+	if (program->num_tracks && program->tracks)
+		free( program->tracks );
+	free( program );
+	return (1);
+}