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Diffstat (limited to 'src/devices/sound/flt_vol.cpp')
-rw-r--r--src/devices/sound/flt_vol.cpp33
1 files changed, 16 insertions, 17 deletions
diff --git a/src/devices/sound/flt_vol.cpp b/src/devices/sound/flt_vol.cpp
index eec55c413f8..c3f8b5f0b2e 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, machine().sample_rate());
+ m_stream = stream_alloc(1, 1, SAMPLE_RATE_OUTPUT_ADAPTIVE);
+ save_item(NAME(m_gain));
}
@@ -35,19 +35,18 @@ void filter_volume_device::device_start()
// sound_stream_update - handle a stream update
//-------------------------------------------------
-void filter_volume_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
+void filter_volume_device::sound_stream_update(sound_stream &stream)
{
- stream_sample_t *src = inputs[0];
- stream_sample_t *dst = outputs[0];
-
- while (samples--)
- *dst++ = (*src++ * m_gain) >> 8;
+ for (int i = 0; i < stream.samples(); i++)
+ stream.put(0, i, stream.get(0, 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 = int(volume * 256);
+ if (m_stream)
+ m_stream->update();
+ m_gain = gain;
+
+ return *this;
}