[PATCH v2 4/5] dmsynth: Compensate gain added by IIR filter.

[Anton Baskanov]

From: Anton Baskanov

---
 dlls/dmsynth/synth.c         | 2 ++
 dlls/dmsynth/tests/dmsynth.c | 6 +++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/dlls/dmsynth/synth.c b/dlls/dmsynth/synth.c
index b110e43aa47..0516b76af9c 100644
--- a/dlls/dmsynth/synth.c
+++ b/dlls/dmsynth/synth.c
@@ -600,6 +600,8 @@ static HRESULT WINAPI synth_Open(IDirectMusicSynth8 *iface, DMUS_PORTPARAMS *par

/* native limits the total voice gain to 6 dB */
     gain = 60.;
+    /* compensate gain added in fluid_iir_filter_q_from_dB/fluid_iir_filter_set_q */
+    gain -= 15.05;
     fluid_settings_setnum(This->fluid_settings, "synth.gain", pow(10., gain / 200.));

if (!(This->fluid_synth = new_fluid_synth(This->fluid_settings)))
diff --git a/dlls/dmsynth/tests/dmsynth.c b/dlls/dmsynth/tests/dmsynth.c
index 7662f26ec4b..4ecaf5863e1 100644
--- a/dlls/dmsynth/tests/dmsynth.c
+++ b/dlls/dmsynth/tests/dmsynth.c
@@ -1798,7 +1798,7 @@ static void test_IKsControl(void)
     ok(hr == S_OK, "got hr %#lx.\n", hr);
     envelope = default_volume_envelope;
     envelope.gain -= 60.;
-    check_volume_envelope(synth, &default_instrument_download, &default_midi, &envelope, TRUE);
+    check_volume_envelope(synth, &default_instrument_download, &default_midi, &envelope, FALSE);

/* default value for volume 1 is 600 */
     volume = 600;
@@ -1809,7 +1809,7 @@ static void test_IKsControl(void)
     ok(hr == S_OK, "got hr %#lx.\n", hr);
     envelope = default_volume_envelope;
     envelope.gain -= 60.;
-    check_volume_envelope(synth, &default_instrument_download, &default_midi, &envelope, TRUE);
+    check_volume_envelope(synth, &default_instrument_download, &default_midi, &envelope, FALSE);

/* gain from volume 0 and 1 is added together */
     volume = 0;
@@ -1820,7 +1820,7 @@ static void test_IKsControl(void)
     ok(hr == S_OK, "got hr %#lx.\n", hr);
     envelope = default_volume_envelope;
     envelope.gain -= 120.;
-    check_volume_envelope(synth, &default_instrument_download, &default_midi, &envelope, TRUE);
+    check_volume_envelope(synth, &default_instrument_download, &default_midi, &envelope, FALSE);

IKsControl_Release(control);
     IDirectMusicSynth_Release(synth);