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Diffstat (limited to 'src/devices/sound/flt_vol.cpp')
-rw-r--r--src/devices/sound/flt_vol.cpp27
1 files changed, 14 insertions, 13 deletions
diff --git a/src/devices/sound/flt_vol.cpp b/src/devices/sound/flt_vol.cpp
index e43da0a1ee6..d5d92209cac 100644
--- a/src/devices/sound/flt_vol.cpp
+++ b/src/devices/sound/flt_vol.cpp
@@ -11,11 +11,11 @@ DEFINE_DEVICE_TYPE(FILTER_VOLUME, filter_volume_device, "filter_volume", "Volume
// filter_volume_device - constructor
//-------------------------------------------------
-filter_volume_device::filter_volume_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
- : device_t(mconfig, FILTER_VOLUME, tag, owner, clock),
- device_sound_interface(mconfig, *this),
- m_stream(nullptr),
- m_gain(0)
+filter_volume_device::filter_volume_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ device_t(mconfig, FILTER_VOLUME, tag, owner, clock),
+ device_sound_interface(mconfig, *this),
+ m_stream(nullptr),
+ m_gain(1.0f)
{
}
@@ -26,8 +26,8 @@ filter_volume_device::filter_volume_device(const machine_config &mconfig, const
void filter_volume_device::device_start()
{
- m_gain = 0x100;
m_stream = stream_alloc(1, 1, SAMPLE_RATE_OUTPUT_ADAPTIVE);
+ save_item(NAME(m_gain));
}
@@ -37,15 +37,16 @@ void filter_volume_device::device_start()
void filter_volume_device::sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs)
{
- // no need to work here; just copy input stream to output and apply gain
- outputs[0] = inputs[0];
- outputs[0].apply_gain(m_gain);
+ for (int i = 0; i < outputs[0].samples(); i++)
+ outputs[0].put(i, inputs[0].get(i) * m_gain);
}
-
-void filter_volume_device::flt_volume_set_volume(float volume)
+filter_volume_device &filter_volume_device::set_gain(float gain)
{
- m_stream->update();
- m_gain = volume;
+ if (m_stream)
+ m_stream->update();
+ m_gain = gain;
+
+ return *this;
}