Rockboy - gameboy emulation for rockbox, based on gnuboy. Still a bit early, but already playable on iRiver H1xx and the simulators. The archos recorder version is currently rather slow...

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6104 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 81 insertions, 0 deletions

diff --git a/apps/plugins/rockboy.c b/apps/plugins/rockboy.c
new file mode 100644
index 0000000..4778fa8
--- /dev/null
+++ b/apps/plugins/rockboy.c
@@ -0,0 +1,81 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 Jens Arnold
+ *
+ * Overlay loader for rockboy on Archos
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "plugin.h"
+
+#if MEM <= 8 && !defined(SIMULATOR)
+
+#define OVL_NAME "/.rockbox/viewers/rockboy.ovl"
+#define OVL_DISPLAYNAME "RockBoy"
+
+struct plugin_api* rb;
+unsigned char *mp3buf;
+int mp3buf_size;
+
+/* this is the plugin entry point */
+enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
+{
+    int fh, readsize;
+    struct {
+        unsigned long magic;
+        unsigned char *start_addr;
+        unsigned char *end_addr;
+        enum plugin_status(*entry_point)(struct plugin_api*, void*);
+    } header;
+
+    /* this macro should be called as the first thing you do in the plugin.
+       it test that the api version and model the plugin was compiled for
+       matches the machine it is running on */
+    TEST_PLUGIN_API(api);
+    rb = api;
+
+    fh = rb->open(OVL_NAME, O_RDONLY);
+    if (fh < 0)
+    {
+        rb->splash(2*HZ, true, "Couldn't open " OVL_DISPLAYNAME " overlay.");
+        return PLUGIN_ERROR;
+    }
+    readsize = rb->read(fh, &header, sizeof(header));
+    if (readsize != sizeof(header) || header.magic != 0x524f564c)
+    {
+        rb->close(fh);
+        rb->splash(2*HZ, true, OVL_NAME " is not a valid Rockbox overlay.");
+        return PLUGIN_ERROR;
+    }
+    
+    mp3buf = rb->plugin_get_mp3_buffer(&mp3buf_size);
+    if (header.start_addr < mp3buf || header.end_addr > mp3buf + mp3buf_size)
+    {
+        rb->close(fh);
+        rb->splash(2*HZ, true, OVL_DISPLAYNAME 
+                   " overlay doesn't fit into memory.");
+        return PLUGIN_ERROR;
+    }
+    rb->lseek(fh, 0, SEEK_SET);
+    readsize = rb->read(fh, header.start_addr, header.end_addr - header.start_addr);
+    rb->close(fh);
+    if (readsize != header.end_addr - header.start_addr)
+    {
+        rb->splash(2*HZ, true, "Error loading " OVL_DISPLAYNAME " overlay.");
+        return PLUGIN_ERROR;
+    }
+    return header.entry_point(api, parameter);
+}
+#endif