root/trunk/freebob/src/avnameinfoblock.cpp

/* avnameinfoblock.cpp
 * Copyright (C) 2004 by Pieter Palmers
 *
 * This file is part of FreeBob.
 *
 * FreeBob 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.
 * FreeBob 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 FreeBob; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA.
 */


#include <string.h>
#include <errno.h>
#include <libavc1394/avc1394.h>
#include <libavc1394/avc1394_vcr.h>
#include "debugmodule.h"

#include "avdescriptor.h"
#include "avinfoblock.h"
#include "avnameinfoblock.h"

AvNameInfoBlock::AvNameInfoBlock(AvDescriptor *parent, int address) : AvInfoBlock(parent,address) {
        // do some more valid checks
        if (getType() != 0x000B) {
                bValid=false;
        }       
        nameBuffer=NULL;

}

AvNameInfoBlock::~AvNameInfoBlock() {

        if(nameBuffer) {
                delete nameBuffer;
        }
}

unsigned char * AvNameInfoBlock::getName() {

        // PP: Can't find this in the specs I have... going to look around a bit for the spec this is in.
        //     (AV/C Information Block Types Specification Version 1.0)
        unsigned int namelen;
        unsigned int readlen=0;
        if (isValid()) {
                // PP: we should parse some raw_text_info_blocks here, but the music spec indicates that there are maximum 3 of these
                //     so I do it manually here. 
                // PP: for my device apparently one block is sufficient.
                // PP: one strange thing remains, that is that there are some NULL characters in the buffer.
                unsigned int length_of_textblock_1=readWord(0x0A);
                unsigned int type_of_textblock_1=readWord(0x0C); // = 0x000A ?
                unsigned int primary_field_length_textblock_1=readWord(0x0E); // ?? I guess ??
                
                if (nameBuffer) {
                        delete nameBuffer;
                }
                nameBuffer=new unsigned char[primary_field_length_textblock_1];
                
                if((readlen=readBuffer(0x10,primary_field_length_textblock_1,nameBuffer))<primary_field_length_textblock_1) {
                        debugPrint (DEBUG_LEVEL_INFO, "      truncated????\n");
                        
                        nameBuffer[primary_field_length_textblock_1-1]=0; // make sure the string converter doesn't read past the buffer
                }
                
                return nameBuffer;
        } else {
                return NULL;
        }
}