forked from bartvdbraak/blender
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
|
/*******************************************************************************
|
||
|
|
* 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
|