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/*******************************************************************************
* Copyright 2009-2016 Jörg Müller
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
#pragma once
/**
* @file ReadDevice.h
* @ingroup devices
* The ReadDevice class.
*/
#include "devices/SoftwareDevice.h"
AUD_NAMESPACE_BEGIN
/**
* This device enables to let the user read raw data out of it.
*/
class AUD_API ReadDevice : public SoftwareDevice
{
private:
/**
* Whether the device is currently playing back.
*/
bool m_playing;
// delete copy constructor and operator=
ReadDevice(const ReadDevice&) = delete;
ReadDevice& operator=(const ReadDevice&) = delete;
protected:
virtual void AUD_LOCAL playing(bool playing);
public:
/**
* Creates a new read device.
* \param specs The wanted audio specification.
*/
ReadDevice(DeviceSpecs specs);
/**
* Creates a new read device.
* \param specs The wanted audio specification.
*/
ReadDevice(Specs specs);
/**
* Closes the device.
*/
virtual ~ReadDevice();
/**
* Reads the next bytes into the supplied buffer.
* \param buffer The target buffer.
* \param length The length in samples to be filled.
* \return True if the reading succeeded, false if there are no sounds
* played back currently, in that case the buffer is filled with
* silence.
*/
bool read(data_t* buffer, int length);
/**
* Changes the output specification.
* \param specs The new audio data specification.
*/
void changeSpecs(Specs specs);
};
AUD_NAMESPACE_END
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