root/trunk/freebob/src/avmidiinfoblock.cpp

/* avmidiinfoblock.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"
#include "avmidiinfoblock.h"

AvMidiInfoBlock::AvMidiInfoBlock(AvDescriptor *parent, int address) : AvInfoBlock(parent,address) {
        // do some more valid checks
        if (getType() != 0x8104) {
                bValid=false;
        }
        
        unsigned int nb_streams=readByte(6);
        unsigned int position=0;
        AvNameInfoBlock *tmpNameBlock;
        
        if (nb_streams>0) {
                position=address+7;
                for (unsigned int i=0;i<nb_streams;i++) {
                        
                        tmpNameBlock=new AvNameInfoBlock(parent, position);
                        
                        if (tmpNameBlock && (tmpNameBlock->isValid())) {
                                position+=tmpNameBlock->getLength()+2; // the 2 is due to the fact that the length of the length field of the infoblock isn't accounted for;
                                
                                // add to child list
                                cNameInfoBlocks.push_back(tmpNameBlock);
                        } else {
                                debugPrint(DEBUG_LEVEL_INFO,"Invalid name block in Midi info Block...\n");
                                bValid=false;
                                break; // what to do now?
                        }
                }
                
        }
        
        // no optional info blocks please...
        
}

AvMidiInfoBlock::~AvMidiInfoBlock() {
        
        vector<AvNameInfoBlock *>::iterator it;
        for( it = cNameInfoBlocks.begin(); it != cNameInfoBlocks.end(); it++ ) {
                delete *it;
        }

}

unsigned int AvMidiInfoBlock::getNbStreams() {
        if(isValid()) {
                return readByte(6);
        } else {
                return 0;
        }
}

unsigned char *AvMidiInfoBlock::getName(unsigned int streamIdx) {
        AvNameInfoBlock *tmpNameBlock;
        
        if ((streamIdx<getNbStreams()) && (streamIdx<cNameInfoBlocks.size())) {
                tmpNameBlock =cNameInfoBlocks.at(streamIdx);
                if (tmpNameBlock) {
                        return tmpNameBlock->getName();
                } else {
                        return NULL;
                }
        }
        return NULL;
}