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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
/***************************************************************************
vgm_visualizer.h
Virtual VGM visualizer device.
Provides a waterfall view, spectrograph view, and VU view.
***************************************************************************/
#ifndef MAME_SOUND_VGMVIZ_H
#define MAME_SOUND_VGMVIZ_H
#pragma once
#include "screen.h"
#include "emupal.h"
#include <vector>
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// device type definition
DECLARE_DEVICE_TYPE(VGMVIZ, vgmviz_device)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> vgmviz_device
class vgmviz_device : public device_t, public device_mixer_interface
{
public:
// construction/destruction
vgmviz_device(const machine_config &mconfig, const char *tag, device_t *owner)
: vgmviz_device(mconfig, tag, owner, 0)
{
}
vgmviz_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
virtual ~vgmviz_device();
void cycle_viz_mode();
void toggle_normalize();
protected:
enum viz_mode : int
{
VIZ_WAVEFORM,
VIZ_WATERFALL,
VIZ_SPEC_START,
VIZ_RAWSPEC = VIZ_SPEC_START,
VIZ_BARSPEC4,
VIZ_BARSPEC8,
VIZ_BARSPEC16,
VIZ_SPEC_END = VIZ_BARSPEC16,
VIZ_COUNT
};
static constexpr int FFT_LENGTH = 512;
static constexpr int BUF_LENGTH = FFT_LENGTH;
static constexpr int SCREEN_WIDTH = FFT_LENGTH / 2;
static constexpr int SCREEN_HEIGHT = 768;
static constexpr size_t NORMALIZE_BUF_SIZE = 131072;
// device-level overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual void device_start() override;
virtual void device_reset() override;
// device_sound_interface-level overrides
void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
void update_waveform(stream_sample_t **outputs);
void update_fft(stream_sample_t **outputs);
void init_palette(palette_device &palette) const;
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
void draw_waveform(bitmap_rgb32 &bitmap);
void draw_waterfall(bitmap_rgb32 &bitmap);
void draw_spectrogram(bitmap_rgb32 &bitmap);
void fill_window();
void apply_window(uint32_t buf_index);
void apply_fft();
void apply_waterfall();
void find_levels();
required_device<screen_device> m_screen;
required_device<palette_device> m_palette;
uint32_t m_history_length;
float m_audio_buf[2][2][FFT_LENGTH];
float m_fft_buf[2][FFT_LENGTH];
int m_current_rate;
int m_audio_fill_index;
int m_audio_frames_available;
int m_audio_count[2];
bool m_audio_available;
int m_waterfall_length;
int m_waterfall_buf[SCREEN_WIDTH * 2][FFT_LENGTH / 2];
float m_curr_levels[2];
float m_curr_peaks[2];
float m_window[FFT_LENGTH];
viz_mode m_viz_mode;
static const bool NEEDS_FFT[VIZ_COUNT];
};
#endif // MAME_SOUND_VGMVIZ_H
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