diff options
Diffstat (limited to 'src/devices/sound/bbd.cpp')
-rw-r--r-- | src/devices/sound/bbd.cpp | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/devices/sound/bbd.cpp b/src/devices/sound/bbd.cpp new file mode 100644 index 00000000000..f09a0e5ad3a --- /dev/null +++ b/src/devices/sound/bbd.cpp @@ -0,0 +1,127 @@ +// license:BSD-3-Clause +// copyright-holders:Aaron Giles +#include "emu.h" +#include "bbd.h" + + +//************************************************************************** +// BBD DEVICE BASE +//************************************************************************** + +//------------------------------------------------- +// bbd_device_base - constructor +//------------------------------------------------- + +bbd_device_base::bbd_device_base(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, device_type type) : + device_t(mconfig, type, tag, owner, clock), + device_sound_interface(mconfig, *this) +{ +} + +void bbd_device_base::set_bucket_count(int buckets) +{ + m_buffer.resize(buckets); +} + +void bbd_device_base::device_start() +{ + m_stream = stream_alloc(1, 1, SAMPLE_RATE_OUTPUT_ADAPTIVE, STREAM_SYNCHRONOUS); + save_item(NAME(m_buffer)); + save_item(NAME(m_curpos)); + + +} + +void bbd_device_base::device_reset() +{ + std::fill(m_buffer.begin(), m_buffer.end(), 0); + m_curpos = 0; +} + +void bbd_device_base::tick() +{ + u32 nextpos = m_curpos + 1; + if(nextpos == m_buffer.size()) + nextpos = 0; + m_buffer[nextpos] = m_buffer[m_curpos]; + m_curpos = nextpos; +} + +void bbd_device_base::sound_stream_update(sound_stream &stream) +{ + u32 nextpos = m_curpos + 1; + if(nextpos == m_buffer.size()) + nextpos = 0; + stream.put(0, 0, m_buffer[nextpos]); + m_buffer[m_curpos] = stream.get(0, 0); +} + + +//************************************************************************** +// MN3004 +//************************************************************************** + +// device type definition +DEFINE_DEVICE_TYPE(MN3004, mn3004_device, "mn3004", "MN3004 BBD") + +mn3004_device::mn3004_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + bbd_device_base(mconfig, tag, owner, clock, MN3004) +{ + set_bucket_count(512); +} + + +//************************************************************************** +// MN3005 +//************************************************************************** + +// device type definition +DEFINE_DEVICE_TYPE(MN3005, mn3005_device, "mn3005", "MN3005 BBD") + +mn3005_device::mn3005_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + bbd_device_base(mconfig, tag, owner, clock, MN3005) +{ + set_bucket_count(4096); +} + + +//************************************************************************** +// MN3006 +//************************************************************************** + +// device type definition +DEFINE_DEVICE_TYPE(MN3006, mn3006_device, "mn3006", "MN3006 BBD") + +mn3006_device::mn3006_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + bbd_device_base(mconfig, tag, owner, clock, MN3006) +{ + set_bucket_count(128); +} + + +//************************************************************************** +// MN3204P +//************************************************************************** + +// device type definition +DEFINE_DEVICE_TYPE(MN3204P, mn3204p_device, "mn3204p", "MN3204P BBD") + +mn3204p_device::mn3204p_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + bbd_device_base(mconfig, tag, owner, clock, MN3204P) +{ + set_bucket_count(512); +} + + +//************************************************************************** +// MN3207P +//************************************************************************** + +// device type definition +DEFINE_DEVICE_TYPE(MN3207, mn3207_device, "mn3207", "MN3207 BBD") + +mn3207_device::mn3207_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + bbd_device_base(mconfig, tag, owner, clock, MN3207) +{ + set_bucket_count(1024); +} |