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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
speaker.h
Speaker output sound device.
Speakers have (x, y, z) coordinates in 3D space:
* Observer is at position (0, 0, 0)
* Positive x is to the right of the observer
* Negative x is to the left of the observer
* Positive y is above the observer
* Negative y is below the observer
* Positive z is in front of the observer
* Negative z is behind the observer
Currently, MAME only considers the sign of the x coordinate (not its
magnitude), and completely ignores the y and z coordinates.
***************************************************************************/
#ifndef MAME_EMU_SPEAKER_H
#define MAME_EMU_SPEAKER_H
#pragma once
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// device type definition
DECLARE_DEVICE_TYPE(SPEAKER, speaker_device)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> speaker_device
class speaker_device : public device_t, public device_mixer_interface
{
public:
// construction/destruction
speaker_device(const machine_config &mconfig, const char *tag, device_t *owner, double x, double y, double z)
: speaker_device(mconfig, tag, owner, 0)
{
set_position(x, y, z);
}
speaker_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
virtual ~speaker_device();
// inline configuration helpers
speaker_device &set_position(double x, double y, double z) { m_x = x; m_y = y; m_z = z; return *this; }
speaker_device &front_center() { set_position( 0.0, 0.0, 1.0); return *this; }
speaker_device &front_left() { set_position(-0.2, 0.0, 1.0); return *this; }
speaker_device &front_floor() { set_position( 0.0, -0.5, 1.0); return *this; }
speaker_device &front_right() { set_position( 0.2, 0.0, 1.0); return *this; }
speaker_device &rear_center() { set_position( 0.0, 0.0, -0.5); return *this; }
speaker_device &rear_left() { set_position(-0.2, 0.0, -0.5); return *this; }
speaker_device &rear_right() { set_position( 0.2, 0.0, -0.5); return *this; }
speaker_device &headrest_center() { set_position( 0.0, 0.0, -0.1); return *this; }
speaker_device &headrest_left() { set_position(-0.1, 0.0, -0.1); return *this; }
speaker_device &headrest_right() { set_position( 0.1, 0.0, -0.1); return *this; }
speaker_device &seat() { set_position( 0.0, -0.5, 0.0); return *this; }
speaker_device &backrest() { set_position( 0.0, -0.2, 0.1); return *this; }
// internally for use by the sound system
void mix(stream_buffer::sample_t *leftmix, stream_buffer::sample_t *rightmix, attotime start, attotime end, int expected_samples, bool suppress);
protected:
// device-level overrides
virtual void device_start() override ATTR_COLD;
virtual void device_stop() override ATTR_COLD;
// inline configuration state
double m_x;
double m_y;
double m_z;
// internal state
static constexpr int BUCKETS_PER_SECOND = 10;
std::vector<stream_buffer::sample_t> m_max_sample;
stream_buffer::sample_t m_current_max;
u32 m_samples_this_bucket;
};
// speaker device iterator
using speaker_device_iterator = device_type_iterator<speaker_device>;
#endif // MAME_EMU_SPEAKER_H
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