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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 TriangleReader.h
* @ingroup generator
* The TriangleReader class.
*/
#include "IReader.h"
AUD_NAMESPACE_BEGIN
/**
* This class is used for sawtooth tone playback.
* The output format is in the 16 bit format and stereo, the sample rate can be
* specified.
* As the two channels both play the same the output could also be mono, but
* in most cases this will result in having to resample for output, so stereo
* sound is created directly.
*/
class AUD_API TriangleReader : public IReader
{
private:
/**
* The frequency of the sine wave.
*/
float m_frequency;
/**
* The current position in samples.
*/
int m_position;
/**
* The value of the current sample.
*/
float m_sample;
/**
* The sample rate for the output.
*/
const SampleRate m_sampleRate;
// delete copy constructor and operator=
TriangleReader(const TriangleReader&) = delete;
TriangleReader& operator=(const TriangleReader&) = delete;
public:
/**
* Creates a new reader.
* \param frequency The frequency of the sine wave.
* \param sampleRate The output sample rate.
*/
TriangleReader(float frequency, SampleRate sampleRate);
/**
* Sets the frequency of the wave.
* @param frequency The new frequency in Hertz.
*/
void setFrequency(float frequency);
virtual bool isSeekable() const;
virtual void seek(int position);
virtual int getLength() const;
virtual int getPosition() const;
virtual Specs getSpecs() const;
virtual void read(int & length, bool &eos, sample_t* buffer);
};
AUD_NAMESPACE_END
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