Aegisub/aegisub/audio_spectrum.h

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// Copyright (c) 2005, 2006, Rodrigo Braz Monteiro
// Copyright (c) 2006, 2007, Niels Martin Hansen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 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.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
#ifndef AUDIO_SPECTRUM_H
#define AUDIO_SPECTRUM_H
#include <wx/wxprec.h>
#include <vector>
#include "audio_provider.h"
// Spectrum cache basically caches the raw result of FFT
class AudioSpectrumCache {
public:
typedef std::vector<float> CacheLine;
virtual CacheLine& GetLine(unsigned long i) = 0;
static void SetLineLength(unsigned long new_length);
virtual ~AudioSpectrumCache() {};
protected:
static CacheLine null_line;
static unsigned long line_length;
};
class AudioSpectrum {
private:
// Data provider
AudioSpectrumCache *cache;
// Colour pallettes
unsigned char colours_normal[256*3];
unsigned char colours_selected[256*3];
AudioProvider *provider;
unsigned long line_length; // number of frequency components per line (half of number of samples)
unsigned long num_lines; // number of lines needed for the audio
float power_scale; // amplification of displayed power
int minband; // smallest frequency band displayed
int maxband; // largest frequency band displayed
public:
AudioSpectrum(AudioProvider *_provider, unsigned long _line_length);
~AudioSpectrum();
void RenderRange(__int64 range_start, __int64 range_end, bool selected, unsigned char *img, int imgleft, int imgwidth, int imgpitch, int imgheight);
void SetScaling(float _power_scale);
};
#endif