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/*
* 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;
/* Main allocator */
static off_t mem_ptr;
static size_t bufsize;
static unsigned char* mallocbuf;
/* libmpeg2 allocator */
static off_t mpeg2_mem_ptr;
static size_t mpeg2_bufsize;
static unsigned char *mpeg2_mallocbuf;
static void * mpeg_malloc_internal (unsigned char *mallocbuf,
off_t *mem_ptr,
size_t bufsize,
unsigned size,
int reason)
{
void *x;
if ((size_t) (*mem_ptr + size) > bufsize)
{
DEBUGF("OUT OF MEMORY\n");
return NULL;
}
x = &mallocbuf[*mem_ptr];
*mem_ptr += (size + 3) & ~3; /* Keep memory 32-bit aligned */
rb->memset(x,0,size);
return x;
(void)reason;
}
void *mpeg_malloc(size_t size, mpeg2_alloc_t reason)
{
return mpeg_malloc_internal(mallocbuf, &mem_ptr, bufsize, size,
reason);
}
size_t mpeg_alloc_init(unsigned char *buf, size_t mallocsize,
size_t libmpeg2size)
{
mem_ptr = 0;
bufsize = mallocsize;
/* Line-align buffer */
mallocbuf = (char *)(((intptr_t)buf + 15) & ~15);
/* Adjust for real size */
bufsize -= mallocbuf - buf;
rb->memset(buf,0,bufsize);
/* Separate allocator for video */
libmpeg2size = (libmpeg2size + 15) & ~15;
if (mpeg_malloc_internal(mallocbuf, &mem_ptr,
bufsize, libmpeg2size, 0) == NULL)
{
return 0;
}
mpeg2_mallocbuf = mallocbuf;
mpeg2_mem_ptr = 0;
mpeg2_bufsize = libmpeg2size;
#if NUM_CORES > 1
flush_icache();
#endif
return bufsize - mpeg2_bufsize;
}
/* 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;
}
void * mpeg2_malloc(unsigned size, mpeg2_alloc_t reason)
{
return mpeg_malloc_internal(mpeg2_mallocbuf, &mpeg2_mem_ptr,
mpeg2_bufsize, size, reason);
}
void mpeg2_free(void *ptr)
{
mpeg2_mem_ptr = (void *)ptr - (void *)mpeg2_mallocbuf;
}
/* The following are expected by libmad */
void * codec_malloc(size_t size)
{
return mpeg_malloc_internal(mallocbuf, &mem_ptr,
bufsize, size, -3);
}
void * codec_calloc(size_t nmemb, size_t size)
{
void* ptr;
ptr = mpeg_malloc_internal(mallocbuf, &mem_ptr,
bufsize, nmemb*size, -3);
if (ptr)
rb->memset(ptr,0,size);
return ptr;
}
void codec_free(void* ptr)
{
mem_ptr = (void *)ptr - (void *)mallocbuf;
}
void *memmove(void *dest, const void *src, size_t n)
{
return rb->memmove(dest,src,n);
}
void *memset(void *s, int c, size_t n)
{
return rb->memset(s,c,n);
}
void abort(void)
{
rb->lcd_putsxy(0,0,"ABORT!");
rb->lcd_update();
while (1);
/* Let's hope this is never called */
}
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