/*
 * Copyright (c) 1999-2000, Eric Moon.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions, and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


// NullAudioOp.cpp

#include "NullAudioOp.h"
#include "IAudioOp.h"
#include "IParameterSet.h"

#include <Debug.h>
#include <ParameterWeb.h>

// -------------------------------------------------------- //
// _NullAudioOp
// -------------------------------------------------------- //

class _NullAudioOp :
        public  IAudioOp {
public:
        _NullAudioOp(
                IAudioOpHost*                                           _host) :
                IAudioOp(_host) {}
        
        uint32 process(
                const AudioBuffer&                      source,
                AudioBuffer&                                            destination,
                double&                                                                 sourceOffset,
                uint32&                                                                 destinationOffset,
                uint32                                                                  framesRequired,
                bigtime_t                                                               performanceTime) {
                
                return framesRequired;
        }
        
        void replace(
                IAudioOp*                                                               oldOp) {
                delete oldOp;
        }
};

// -------------------------------------------------------- //
// _NullParameterSet
// -------------------------------------------------------- //

class _NullParameterSet :
        public  IParameterSet {
public:
        status_t store(
                int32                                                                           parameterID,
                void*                                                                           data,
                size_t                                                                  size) { return B_ERROR; }

        status_t retrieve(
                int32                                                                           parameterID,
                void*                                                                           data,
                size_t*                                                                 ioSize) { return B_ERROR; }
                
        // implement this hook to return a BParameterGroup representing
        // the parameters represented by this set
        
        void populateGroup(
                BParameterGroup*                                group) {
//      
//              group->MakeNullParameter(
//                      0,
//                      B_MEDIA_NO_TYPE,
//                      "NullFilter has no parameters",
//                      B_GENERIC);     
        }
};

// -------------------------------------------------------- //
// NullAudioOpFactory impl.
// -------------------------------------------------------- //

IAudioOp* NullAudioOpFactory::createOp(
        IAudioOpHost*                                                                           host,
        const media_raw_audio_format&           inputFormat,
        const media_raw_audio_format&           outputFormat) {

        return new _NullAudioOp(host);  
}
                
IParameterSet* NullAudioOpFactory::createParameterSet() {
        return new _NullParameterSet();
}