FluidSynth: add polyphony setting

modules/codec/fluidsynth.c

@@ -51,6 +51,11 @@
 #define GAIN_LONGTEXT N_("This gain is applied to synthesis output. " \
     "High values may cause saturation when many notes are played at a time." )
 
+#define POLYPHONY_TEXT N_("Polyphony")
+#define POLYPHONY_LONGTEXT N_( \
+    "The polyphony defines how many voices can be played at a time. " \
+    "Larger values require more processing power.")
+
 #define SAMPLE_RATE_TEXT N_("Sample rate")
 
 static int  Open  (vlc_object_t *);
@@ -67,6 +72,9 @@ vlc_module_begin ()
                   SOUNDFONT_TEXT, SOUNDFONT_LONGTEXT, false)
     add_float ("synth-gain", 0.8, GAIN_TEXT, GAIN_LONGTEXT, false)
         change_float_range (0., 10.)
+    add_integer ("synth-polyphony", 256,
+                 POLYPHONY_TEXT, POLYPHONY_LONGTEXT, false)
+        change_integer_range (1, 65535)
     add_integer ("synth-sample-rate", 44100,
                  SAMPLE_RATE_TEXT, SAMPLE_RATE_TEXT, true)
         change_integer_range (22050, 96000)
@@ -148,6 +156,8 @@ static int Open (vlc_object_t *p_this)
 
     fluid_synth_set_gain (p_sys->synth,
                           var_InheritFloat (p_this, "synth-gain"));
+    fluid_synth_set_polyphony (p_sys->synth,
+                               var_InheritInteger (p_this, "synth-polyphony"));
 
     p_dec->fmt_out.i_cat = AUDIO_ES;
     p_dec->fmt_out.audio.i_rate =