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https://github.com/holub/mame
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ddfe149872
visualiser device and WDL FFT libarary). I changed the VGM visualiser to use single-precision float which is the default for WDL FFT. GCC's loop vectoriser can make better use of SSE with single-precision maths, and the extra precision shouldn't be needed for the visualisation. If this is a problem, let me know and I'll revert this and flip the WDL FFT library over the other way.
90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Ryan Holtz
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/***************************************************************************
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vgm_visualizer.h
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Virtual VGM visualizer device.
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Provides a waterfall view, spectrograph view, and VU view.
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***************************************************************************/
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#ifndef MAME_SOUND_VGMVIZ_H
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#define MAME_SOUND_VGMVIZ_H
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#pragma once
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#include "screen.h"
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#include "emupal.h"
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#include <vector>
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//**************************************************************************
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// GLOBAL VARIABLES
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//**************************************************************************
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// device type definition
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DECLARE_DEVICE_TYPE(VGMVIZ, vgmviz_device)
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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// ======================> vgmviz_device
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class vgmviz_device : public device_t, public device_mixer_interface
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{
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public:
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// construction/destruction
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vgmviz_device(const machine_config &mconfig, const char *tag, device_t *owner)
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: vgmviz_device(mconfig, tag, owner, 0)
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{
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}
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vgmviz_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
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virtual ~vgmviz_device();
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protected:
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static constexpr int FFT_LENGTH = 1024;
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// device-level overrides
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virtual void device_add_mconfig(machine_config &config) override;
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virtual void device_start() override;
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virtual void device_reset() override;
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// device_sound_interface-level overrides
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void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
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void init_palette(palette_device &palette) const;
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uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
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void fill_window();
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void apply_window(uint32_t buf_index);
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void apply_fft();
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void apply_waterfall();
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void find_levels();
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required_device<screen_device> m_screen;
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required_device<palette_device> m_palette;
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float m_audio_buf[2][2][FFT_LENGTH];
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float m_fft_buf[2][FFT_LENGTH];
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int m_current_rate;
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int m_audio_fill_index;
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int m_audio_frames_available;
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int m_audio_count[2];
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bool m_audio_available;
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int m_waterfall_length;
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int m_waterfall_buf[1024][256];
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float m_curr_levels[2];
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float m_curr_peaks[2];
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float m_window[FFT_LENGTH];
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float m_power;
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};
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#endif // MAME_SOUND_VGMVIZ_H
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