Add codecs to librbcodec.

Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libgme/rom_data.c b/lib/rbcodec/codecs/libgme/rom_data.c
new file mode 100644
index 0000000..9c36a99
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/rom_data.c
@@ -0,0 +1,68 @@
+// Game_Music_Emu 0.5.2. http://www.slack.net/~ant/
+
+#include "rom_data.h"
+
+/* Copyright (C) 2003-2006 Shay Green. This module is free software; you
+can redistribute it and/or modify it under the terms of the GNU Lesser
+General Public License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version. This
+module 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 Lesser General Public License for more
+details. You should have received a copy of the GNU Lesser General Public
+License along with this module; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
+
+#include <string.h>
+#include "blargg_source.h"
+
+// Rom_Data
+
+blargg_err_t Rom_load( struct Rom_Data* this, const void* data, long size,
+		int header_size, void* header_out, int fill )
+{
+	int file_offset = this->pad_size;
+	
+	this->rom_addr = 0;
+	this->mask     = 0;
+	this->size    = 0;
+	
+	if ( size <= header_size ) // <= because there must be data after header
+		return gme_wrong_file_type;
+	
+	// Read header
+	memcpy( header_out, data, header_size );
+	
+	this->file_size = size - header_size;
+	this->file_data = (byte*) data + header_size;
+	
+	memset( this->unmapped, fill, this->rom_size );
+	memcpy( &this->unmapped [file_offset], this->file_data, 
+		this->file_size < this->pad_size ? this->file_size : this->pad_size );
+	
+	return 0;
+}
+
+void Rom_set_addr( struct Rom_Data* this, int addr )
+{
+	this->rom_addr = addr - this->bank_size - pad_extra;
+	
+	int rounded = (addr + this->file_size + this->bank_size - 1) / this->bank_size * this->bank_size;
+	if ( rounded <= 0 )
+	{
+		rounded = 0;
+	}
+	else
+	{
+		int shift = 0;
+		unsigned int max_addr = (unsigned int) (rounded - 1);
+		while ( max_addr >> shift )
+			shift++;
+		this->mask = (1L << shift) - 1;
+	}
+	
+	if ( addr < 0 )
+		addr = 0;
+	this->size = rounded;
+	this->rsize_ = rounded - this->rom_addr + pad_extra;
+}