Initial commit of work-in-progress MPEG video player plugin based on libmpeg2. Works on all targets with colour LCDs, but most optimised for the ipod Color/Photo and Nano. It currently only plays raw MPEG-1 or MPEG-2 video streams (no audio). Also adds a new lcd_yuv_blit() function to the plugin API - currently only implemented for the ipod Color/Photo and Nano.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10479 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/mpegplayer/alloc.c

@@ -0,0 +1,76 @@
+/*
+ * alloc.c
+ * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ * See http://libmpeg2.sourceforge.net/ for updates.
+ *
+ * mpeg2dec 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.
+ *
+ * mpeg2dec 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
+ */
+
+#include "plugin.h"
+
+#include "mpeg2.h"
+
+extern struct plugin_api* rb;
+
+long mem_ptr;
+long bufsize;
+unsigned char* mallocbuf;
+
+void mpeg2_alloc_init(unsigned char* buf, int mallocsize)
+{
+    mem_ptr = 0;
+    bufsize = mallocsize;
+    mallocbuf = buf;
+  
+    return;
+}
+
+void * mpeg2_malloc (unsigned size, mpeg2_alloc_t reason)
+{
+    void* x;
+
+    (void)reason;
+
+    if (mem_ptr + (long)size > bufsize) {
+        DEBUGF("OUT OF MEMORY\n");
+        return NULL;
+    }
+    
+    x=&mallocbuf[mem_ptr];
+    mem_ptr+=(size+3)&~3; /* Keep memory 32-bit aligned */
+
+    return(x);
+}
+
+void mpeg2_free(void* ptr) {
+    (void)ptr;
+}
+
+/* gcc may want to use memcpy before rb is initialised, so here's a trivial 
+   implementation */
+
+void *memcpy(void *dest, const void *src, size_t n) {
+    size_t i;
+    char* d=(char*)dest;
+    char* s=(char*)src;
+
+    for (i=0;i<n;i++)
+        d[i]=s[i];
+
+    return dest;
+}