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-rw-r--r--src/emu/sound/cem3394.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/src/emu/sound/cem3394.h b/src/emu/sound/cem3394.h
new file mode 100644
index 00000000000..adfac9e4a72
--- /dev/null
+++ b/src/emu/sound/cem3394.h
@@ -0,0 +1,45 @@
+#ifndef cem3394_h
+#define cem3394_h
+
+
+#define CEM3394_SAMPLE_RATE (44100*4)
+
+
+/* interface */
+struct cem3394_interface
+{
+ double vco_zero_freq; /* frequency at 0V for VCO */
+ double filter_zero_freq; /* frequency at 0V for filter */
+ void (*external)(int, int, short *);/* external input source */
+};
+
+/* inputs */
+enum
+{
+ CEM3394_VCO_FREQUENCY = 0,
+ CEM3394_MODULATION_AMOUNT,
+ CEM3394_WAVE_SELECT,
+ CEM3394_PULSE_WIDTH,
+ CEM3394_MIXER_BALANCE,
+ CEM3394_FILTER_RESONANCE,
+ CEM3394_FILTER_FREQENCY,
+ CEM3394_FINAL_GAIN
+};
+
+/* set the voltage going to a particular parameter */
+void cem3394_set_voltage(int chip, int input, double voltage);
+
+/* get the translated parameter associated with the given input as follows:
+ CEM3394_VCO_FREQUENCY: frequency in Hz
+ CEM3394_MODULATION_AMOUNT: scale factor, 0.0 to 2.0
+ CEM3394_WAVE_SELECT: voltage from this line
+ CEM3394_PULSE_WIDTH: width fraction, from 0.0 to 1.0
+ CEM3394_MIXER_BALANCE: balance, from -1.0 to 1.0
+ CEM3394_FILTER_RESONANCE: resonance, from 0.0 to 1.0
+ CEM3394_FILTER_FREQENCY: frequency, in Hz
+ CEM3394_FINAL_GAIN: gain, in dB */
+double cem3394_get_parameter(int chip, int input);
+
+
+#endif
+