Initial revision

svn-id: r4785

1 files changed, 201 insertions, 0 deletions

diff --git a/backends/dc/dcmain.cpp b/backends/dc/dcmain.cpp
new file mode 100644
index 0000000000..a64643a004
--- /dev/null
+++ b/backends/dc/dcmain.cpp
@@ -0,0 +1,201 @@
+/* ScummVM - Scumm Interpreter
+ * Dreamcast port
+ * Copyright (C) 2002  Marcus Comstedt
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#include "stdafx.h"
+#include "scumm.h"
+#include "mididrv.h"
+#include "gameDetector.h"
+#include "dc.h"
+#include "icon.h"
+
+
+Icon icon;
+
+
+OSystem *OSystem_Dreamcast_create() {
+	return OSystem_Dreamcast::create();
+}
+
+OSystem *OSystem_Dreamcast::create() {
+	OSystem_Dreamcast *syst = new OSystem_Dreamcast();
+	return syst;
+}
+
+/* CD Audio */
+static bool find_track(int track, int &first_sec, int &last_sec)
+{
+  struct TOC *toc = cdfs_gettoc();
+  if(!toc)
+    return false;
+  int i, first, last;
+  first = TOC_TRACK(toc->first);
+  last = TOC_TRACK(toc->last);
+  if(first < 1 || last > 99 || first > last)
+    return false;
+  for(i=last; i>=first; --i)
+    if(!(TOC_CTRL(toc->entry[i-1])&4))
+      if(track==1) {
+	first_sec = TOC_LBA(toc->entry[i-1]);
+	last_sec = TOC_LBA(toc->entry[i]);
+	return true;
+      } else
+	--track;
+  return false;
+}
+
+void OSystem_Dreamcast::play_cdrom(int track, int num_loops,
+				   int start_frame, int end_frame)
+{
+  int first_sec, last_sec;
+#if 1
+  if(num_loops)
+    --num_loops;
+#endif
+  if(num_loops>14) num_loops=14;
+  else if(num_loops<0) num_loops=15; // infinity
+  if(!find_track(track, first_sec, last_sec))
+    return;
+  if(end_frame)
+    last_sec = first_sec + start_frame + end_frame;
+  first_sec += start_frame;
+  play_cdda_sectors(first_sec, last_sec, num_loops);
+}
+
+void OSystem_Dreamcast::stop_cdrom()
+{
+  stop_cdda();
+}
+
+bool OSystem_Dreamcast::poll_cdrom()
+{
+  extern int getCdState();
+  return getCdState() == 3;
+}
+
+void OSystem_Dreamcast::update_cdrom()
+{
+  // Dummy.  The CD drive takes care of itself.
+}
+
+uint32 OSystem_Dreamcast::property(int param, Property *value)
+{
+  switch(param) {
+
+  case PROP_GET_SAMPLE_RATE:
+    return 22050;
+
+  }
+  
+  return 0;
+}
+
+void OSystem_Dreamcast::quit() {
+  exit(0);
+}
+
+void *OSystem_Dreamcast::create_thread(ThreadProc *proc, void *param) {
+  warning("Creating a thread! (not supported.)\n");
+}
+
+uint32 OSystem_Dreamcast::get_msecs()
+{
+  static uint32 msecs=0;
+  static unsigned int t0=0;
+
+  unsigned int t = Timer();
+  unsigned int dm, dt = t - t0;
+
+  t0 = t;
+  dm = (dt << 6)/3125U;
+  dt -= (dm * 3125U)>>6;
+  t0 -= dt;
+
+  return msecs += dm;
+}
+
+void OSystem_Dreamcast::delay_msecs(uint msecs)
+{
+  get_msecs();
+  unsigned int t, start = Timer();
+  int time = (((unsigned int)msecs)*100000U)>>11;
+  while(((int)((t = Timer())-start))<time)
+    checkSound();
+  get_msecs();
+}
+
+/*
+void waitForTimer(Scumm *s, int time)
+{
+  if(time<0)
+    return;
+  unsigned int start = Timer();
+  unsigned int devpoll = start+USEC_TO_TIMER(25000);
+  unsigned int t;
+  int oldmousex = s->mouse.x, oldmousey = s->mouse.y;
+  time = (((unsigned int)time)*100000U)>>11;
+  int mask = getimask();
+  while(((int)((t = Timer())-start))<time)
+    if(((int)(t-devpoll))>0) {
+      setimask(15);
+      checkSound();
+      handleInput(locked_get_pads(), s->mouse.x, s->mouse.y,
+		  s->_leftBtnPressed, s->_rightBtnPressed, s->_keyPressed);
+      setimask(mask);
+      devpoll += USEC_TO_TIMER(17000);
+      if(s->mouse.x != oldmousex || s->mouse.y != oldmousey) {
+	extern void updateScreen(Scumm *s);
+	updateScreen(s);
+	oldmousex = s->mouse.x;
+	oldmousey = s->mouse.y;
+      }
+    }
+}
+*/
+
+void dc_init_hardware(void)
+{
+#ifndef NOSERIAL
+  serial_init(57600);
+  usleep(2000000);
+  printf("Serial OK\r\n");
+#endif
+
+  cdfs_init();
+  maple_init();
+  dc_setup_ta();
+  init_arm();
+}
+
+int dc_setup(GameDetector &detector)
+{
+  static char *argv[] = { "scummvm", NULL, NULL, NULL };
+  static int argc = 3;
+
+  initSound();
+
+  if(!selectGame(&detector, argv[2], argv[1], icon))
+    exit(0);
+
+  detector.parseCommandLine(argc, argv);
+
+  return 0;
+}