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36 lines
778 B
C++
36 lines
778 B
C++
// Simple audio waveform scope in a window, using SDL multimedia library
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#ifndef AUDIO_SCOPE_H
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#define AUDIO_SCOPE_H
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#include "SDL.h"
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class Audio_Scope {
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public:
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typedef const char* error_t;
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// Initialize scope window of specified size. Height must be 256 or less.
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error_t init( int width, int height );
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// Draw at most 'count' samples from 'in', skipping 'step' samples after
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// each sample drawn. Step can be less than 1.0.
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error_t draw( const short* in, long count, double step = 1.0 );
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Audio_Scope();
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~Audio_Scope();
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private:
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typedef unsigned char byte;
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SDL_Surface* screen;
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SDL_Surface* surface;
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byte* buf;
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int buf_size;
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int sample_shift;
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int low_y;
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int high_y;
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int v_offset;
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void render( short const* in, long count, long step );
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};
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#endif
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