[PATCH] dmsynth/tests: Clarify the sink init / synth latency clock relationship

[Michael Stefaniuc]

Signed-off-by: Michael Stefaniuc 
---
Found while wondering why SetSynthSink() is not calling the sink's
Init() method but GetLatencyClock().
The documentation states that the timing related methods should be
passed on to the sink.
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/idirectmusic...

dlls/dmsynth/tests/dmsynth.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/dlls/dmsynth/tests/dmsynth.c b/dlls/dmsynth/tests/dmsynth.c
index 3ddf40817a5..3970933cb6f 100644
--- a/dlls/dmsynth/tests/dmsynth.c
+++ b/dlls/dmsynth/tests/dmsynth.c
@@ -44,6 +44,13 @@ static BOOL missing_dmsynth(void)
     return TRUE;
 }

+static ULONG get_refcount(void *iface)
+{
+    IUnknown *unknown = iface;
+    IUnknown_AddRef(unknown);
+    return IUnknown_Release(unknown);
+}
+
 static void test_dmsynth(void)
 {
     IDirectMusicSynth *dmsynth = NULL;
@@ -52,6 +59,7 @@ static void test_dmsynth(void)
     IReferenceClock* clock_sink = NULL;
     IKsControl* control_synth = NULL;
     IKsControl* control_sink = NULL;
+    ULONG ref_clock_synth, ref_clock_sink;
     HRESULT hr;
     KSPROPERTY property;
     ULONG value;
@@ -104,6 +112,10 @@ static void test_dmsynth(void)
     ok(bytes == sizeof(DWORD), "Returned bytes: %u, should be 4\n", bytes);
     ok(value == TRUE, "Return value: %u, should be 1\n", value);

+    /* Synth isn't fully initialized yet */
+    hr = IDirectMusicSynth_Activate(dmsynth, TRUE);
+    todo_wine ok(hr == DMUS_E_NOSYNTHSINK, "IDirectMusicSynth_Activate returned: %x\n", hr);
+
     /* Synth has no default clock */
     hr = IDirectMusicSynth_GetLatencyClock(dmsynth, &clock_synth);
     ok(hr == DMUS_E_NOSYNTHSINK, "IDirectMusicSynth_GetLatencyClock returned: %x\n", hr);
@@ -112,8 +124,9 @@ static void test_dmsynth(void)
     hr = IDirectMusicSynthSink_GetLatencyClock(dmsynth_sink, &clock_sink);
     ok(hr == S_OK, "IDirectMusicSynth_GetLatencyClock returned: %x\n", hr);
     ok(clock_sink != NULL, "No clock returned\n");
+    ref_clock_sink = get_refcount(clock_sink);

-    /* This will set clock to Synth */
+    /* This will Init() the SynthSink and finish initializing the Synth */
     hr = IDirectMusicSynth_SetSynthSink(dmsynth, dmsynth_sink);
     ok(hr == S_OK, "IDirectMusicSynth_SetSynthSink returned: %x\n", hr);

@@ -122,6 +135,8 @@ static void test_dmsynth(void)
     ok(hr == S_OK, "IDirectMusicSynth_GetLatencyClock returned: %x\n", hr);
     ok(clock_synth != NULL, "No clock returned\n");
     ok(clock_synth == clock_sink, "Synth and SynthSink clocks are not the same\n");
+    ref_clock_synth = get_refcount(clock_synth);
+    ok(ref_clock_synth > ref_clock_sink + 1, "Latency clock refcount didn't increase\n");

if (control_synth)
         IDirectMusicSynth_Release(control_synth);