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-rw-r--r--apps/plugins/mpegplayer/alloc.c233
1 files changed, 233 insertions, 0 deletions
diff --git a/apps/plugins/mpegplayer/alloc.c b/apps/plugins/mpegplayer/alloc.c
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--- /dev/null
+++ b/apps/plugins/mpegplayer/alloc.c
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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
+ *
+ * $Id$
+ * libmpeg2 sync history:
+ * 2008-07-01 - CVS revision 1.13
+ */
+
+#include "plugin.h"
+#include "mpegplayer.h"
+#include <system.h>
+
+/* Main allocator */
+static off_t mem_ptr;
+static size_t bufsize;
+static unsigned char* mallocbuf;
+
+/* libmpeg2 allocator */
+static off_t mpeg2_mem_ptr SHAREDBSS_ATTR;
+static size_t mpeg2_bufsize SHAREDBSS_ATTR;
+static unsigned char *mpeg2_mallocbuf SHAREDBSS_ATTR;
+static unsigned char *mpeg2_bufallocbuf SHAREDBSS_ATTR;
+
+#if defined(DEBUG) || defined(SIMULATOR)
+const char * mpeg_get_reason_str(int reason)
+{
+ const char *str;
+
+ switch (reason)
+ {
+ case MPEG2_ALLOC_MPEG2DEC:
+ str = "MPEG2_ALLOC_MPEG2DEC";
+ break;
+ case MPEG2_ALLOC_CHUNK:
+ str = "MPEG2_ALLOC_CHUNK";
+ break;
+ case MPEG2_ALLOC_YUV:
+ str = "MPEG2_ALLOC_YUV";
+ break;
+ case MPEG2_ALLOC_CONVERT_ID:
+ str = "MPEG2_ALLOC_CONVERT_ID";
+ break;
+ case MPEG2_ALLOC_CONVERTED:
+ str = "MPEG2_ALLOC_CONVERTED";
+ break;
+ case MPEG_ALLOC_MPEG2_BUFFER:
+ str = "MPEG_ALLOC_MPEG2_BUFFER";
+ break;
+ case MPEG_ALLOC_AUDIOBUF:
+ str = "MPEG_ALLOC_AUDIOBUF";
+ break;
+ case MPEG_ALLOC_PCMOUT:
+ str = "MPEG_ALLOC_PCMOUT";
+ break;
+ case MPEG_ALLOC_DISKBUF:
+ str = "MPEG_ALLOC_DISKBUF";
+ break;
+ case MPEG_ALLOC_CODEC_MALLOC:
+ str = "MPEG_ALLOC_CODEC_MALLOC";
+ break;
+ case MPEG_ALLOC_CODEC_CALLOC:
+ str = "MPEG_ALLOC_CODEC_CALLOC";
+ break;
+ default:
+ str = "Unknown";
+ }
+
+ return str;
+}
+#endif
+
+static void * mpeg_malloc_internal (unsigned char *mallocbuf,
+ off_t *mem_ptr,
+ size_t bufsize,
+ unsigned size,
+ int reason)
+{
+ void *x;
+
+ DEBUGF("mpeg_alloc_internal: bs:%lu s:%u reason:%s (%d)\n",
+ (unsigned long)bufsize, size, mpeg_get_reason_str(reason), reason);
+
+ 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 */
+
+ return x;
+ (void)reason;
+}
+
+void *mpeg_malloc(size_t size, mpeg2_alloc_t reason)
+{
+ return mpeg_malloc_internal(mallocbuf, &mem_ptr, bufsize, size,
+ reason);
+}
+
+void *mpeg_malloc_all(size_t *size_out, mpeg2_alloc_t reason)
+{
+ /* Can steal all but MIN_MEMMARGIN */
+ if (bufsize - mem_ptr < MIN_MEMMARGIN)
+ return NULL;
+
+ *size_out = bufsize - mem_ptr - MIN_MEMMARGIN;
+ return mpeg_malloc(*size_out, reason);
+}
+
+bool mpeg_alloc_init(unsigned char *buf, size_t mallocsize)
+{
+ mem_ptr = 0;
+ /* Cache-align buffer or 4-byte align */
+ mallocbuf = buf;
+ bufsize = mallocsize;
+ ALIGN_BUFFER(mallocbuf, bufsize, CACHEALIGN_UP(4));
+
+ /* Separate allocator for video */
+ mpeg2_mem_ptr = 0;
+ mpeg2_mallocbuf = mallocbuf;
+ mpeg2_bufallocbuf = mallocbuf;
+ mpeg2_bufsize = CACHEALIGN_UP(LIBMPEG2_ALLOC_SIZE);
+
+ if (mpeg_malloc_internal(mallocbuf, &mem_ptr,
+ bufsize, mpeg2_bufsize,
+ MPEG_ALLOC_MPEG2_BUFFER) == NULL)
+ {
+ return false;
+ }
+
+ IF_COP(rb->commit_discard_dcache());
+ return true;
+}
+
+/* allocate non-dedicated buffer space which mpeg2_mem_reset will free */
+void * mpeg2_malloc(unsigned size, mpeg2_alloc_t reason)
+{
+ void *ptr = mpeg_malloc_internal(mpeg2_mallocbuf, &mpeg2_mem_ptr,
+ mpeg2_bufsize, size, reason);
+ /* libmpeg2 expects zero-initialized allocations */
+ if (ptr)
+ rb->memset(ptr, 0, size);
+
+ return ptr;
+}
+
+/* allocate dedicated buffer - memory behind buffer pointer becomes dedicated
+ so order is important */
+void * mpeg2_bufalloc(unsigned size, mpeg2_alloc_t reason)
+{
+ void *buf = mpeg2_malloc(size, reason);
+
+ if (buf == NULL)
+ return NULL;
+
+ mpeg2_bufallocbuf = &mpeg2_mallocbuf[mpeg2_mem_ptr];
+ return buf;
+}
+
+/* return unused buffer portion and size */
+void * mpeg2_get_buf(size_t *size)
+{
+ if ((size_t)mpeg2_mem_ptr + 32 >= mpeg2_bufsize)
+ return NULL;
+
+ *size = mpeg2_bufsize - mpeg2_mem_ptr;
+ return &mpeg2_mallocbuf[mpeg2_mem_ptr];
+}
+
+/* de-allocate all non-dedicated buffer space */
+void mpeg2_mem_reset(void)
+{
+ DEBUGF("mpeg2_mem_reset\n");
+ mpeg2_mem_ptr = mpeg2_bufallocbuf - mpeg2_mallocbuf;
+}
+
+/* The following are expected by libmad */
+void * codec_malloc(size_t size)
+{
+ void* ptr;
+
+ ptr = mpeg_malloc_internal(mallocbuf, &mem_ptr,
+ bufsize, size, MPEG_ALLOC_CODEC_MALLOC);
+
+ if (ptr)
+ rb->memset(ptr,0,size);
+
+ return ptr;
+}
+
+void * codec_calloc(size_t nmemb, size_t size)
+{
+ void* ptr;
+
+ ptr = mpeg_malloc_internal(mallocbuf, &mem_ptr,
+ bufsize, nmemb*size,
+ MPEG_ALLOC_CODEC_CALLOC);
+
+ if (ptr)
+ rb->memset(ptr,0,size);
+
+ return ptr;
+}
+
+void codec_free(void* ptr)
+{
+ DEBUGF("codec_free - %p\n", ptr);
+#if 0
+ mem_ptr = (void *)ptr - (void *)mallocbuf;
+#endif
+ (void)ptr;
+}