[PATCH v4 6/6] wineswmidi: Initialize DirectMusic when opening the device.

[Anton Baskanov]

From: Anton Baskanov

---
 dlls/wineswmidi/Makefile.in |   1 +
 dlls/wineswmidi/swmidi.c    | 119 ++++++++++++++++++++++++++++++++++++
 2 files changed, 120 insertions(+)

diff --git a/dlls/wineswmidi/Makefile.in b/dlls/wineswmidi/Makefile.in
index 5e9a8995868..24210437d0a 100644
--- a/dlls/wineswmidi/Makefile.in
+++ b/dlls/wineswmidi/Makefile.in
@@ -1,4 +1,5 @@
 MODULE = wineswmidi.dll
+IMPORTS = uuid ole32
 DELAYIMPORTS = winmm

SOURCES = \
diff --git a/dlls/wineswmidi/swmidi.c b/dlls/wineswmidi/swmidi.c
index f203ad1221a..79bd0984007 100644
--- a/dlls/wineswmidi/swmidi.c
+++ b/dlls/wineswmidi/swmidi.c
@@ -24,10 +24,16 @@
 #include "mmddk.h"
 #include "mmdeviceapi.h"

+#include "initguid.h"
+#include "dmusicc.h"
+
 #include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(midi);

+#define SWMIDI_AUDIO_CHANNELS 2
+#define SWMIDI_SAMPLE_RATE 22050
+
 struct swmidi
 {
     CRITICAL_SECTION cs;
@@ -35,10 +41,94 @@ struct swmidi
     BOOL open;
     MIDIOPENDESC open_desc;
     WORD flags;
+
+    HANDLE close_event;
+    HANDLE open_event;
+    HANDLE thread;
+    DWORD init_result;
+
+    IDirectMusic *dmusic;
+    IDirectMusicPort *port;
 };

static struct swmidi swmidi;

+static HRESULT init_dmusic(void)
+{
+    DMUS_PORTPARAMS port_params;
+    HRESULT hr;
+
+    hr = CoCreateInstance(&CLSID_DirectMusic, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectMusic,
+            (void **)&swmidi.dmusic);
+    if (FAILED(hr))
+        return hr;
+
+    hr = IDirectMusic_SetDirectSound(swmidi.dmusic, NULL, NULL);
+    if (FAILED(hr))
+    {
+        IDirectMusic_Release(swmidi.dmusic);
+        return hr;
+    }
+
+    memset(&port_params, 0, sizeof(port_params));
+    port_params.dwSize = sizeof(port_params);
+    port_params.dwValidParams = DMUS_PORTPARAMS_CHANNELGROUPS | DMUS_PORTPARAMS_AUDIOCHANNELS
+            | DMUS_PORTPARAMS_SAMPLERATE | DMUS_PORTPARAMS_EFFECTS;
+    port_params.dwChannelGroups = 1;
+    port_params.dwAudioChannels = SWMIDI_AUDIO_CHANNELS;
+    port_params.dwSampleRate = SWMIDI_SAMPLE_RATE;
+    port_params.dwEffectFlags = 0;
+    hr = IDirectMusic_CreatePort(swmidi.dmusic, &GUID_NULL, &port_params, &swmidi.port, NULL);
+    if (FAILED(hr))
+    {
+        IDirectMusic_Release(swmidi.dmusic);
+        return hr;
+    }
+
+    hr = IDirectMusicPort_Activate(swmidi.port, TRUE);
+    if (FAILED(hr))
+    {
+        IDirectMusicPort_Release(swmidi.port);
+        IDirectMusic_Release(swmidi.dmusic);
+        return hr;
+    }
+
+    return S_OK;
+}
+
+static void destroy_dmusic(void)
+{
+    IDirectMusicPort_Activate(swmidi.port, FALSE);
+    IDirectMusicPort_Release(swmidi.port);
+    IDirectMusic_Release(swmidi.dmusic);
+}
+
+static DWORD WINAPI thread_proc(void *param)
+{
+    SetThreadDescription(GetCurrentThread(), L"swmidi");
+
+    CoInitialize(NULL);
+
+    if (FAILED(init_dmusic()))
+    {
+        CoUninitialize();
+        swmidi.init_result = MMSYSERR_ERROR;
+        SetEvent(swmidi.open_event);
+        return 0;
+    }
+
+    swmidi.init_result = MMSYSERR_NOERROR;
+    SetEvent(swmidi.open_event);
+
+    WaitForSingleObject(swmidi.close_event, INFINITE);
+
+    destroy_dmusic();
+
+    CoUninitialize();
+
+    return 0;
+}
+
 static DWORD swmidi_init(void)
 {
     TRACE("\n");
@@ -88,6 +178,28 @@ static DWORD swmidi_open(MIDIOPENDESC *desc, UINT flags)
         return MMSYSERR_ALLOCATED;
     }

+    swmidi.close_event = CreateEventA(NULL, FALSE, FALSE, NULL);
+    swmidi.open_event = CreateEventA(NULL, FALSE, FALSE, NULL);
+
+    swmidi.thread = CreateThread(NULL, 0, thread_proc, NULL, 0, NULL);
+    if (!swmidi.thread)
+    {
+        LeaveCriticalSection(&swmidi.cs);
+        return MMSYSERR_ERROR;
+    }
+
+    WaitForSingleObject(swmidi.open_event, INFINITE);
+
+    if (swmidi.init_result != MMSYSERR_NOERROR)
+    {
+        WaitForSingleObject(swmidi.thread, INFINITE);
+        CloseHandle(swmidi.thread);
+        CloseHandle(swmidi.open_event);
+        CloseHandle(swmidi.close_event);
+        LeaveCriticalSection(&swmidi.cs);
+        return swmidi.init_result;
+    }
+
     swmidi.open = TRUE;
     swmidi.open_desc = *desc;
     swmidi.flags = HIWORD(flags & CALLBACK_TYPEMASK);
@@ -106,6 +218,13 @@ static DWORD swmidi_close(void)

EnterCriticalSection(&swmidi.cs);

+    SetEvent(swmidi.close_event);
+    WaitForSingleObject(swmidi.thread, INFINITE);
+
+    CloseHandle(swmidi.thread);
+    CloseHandle(swmidi.open_event);
+    CloseHandle(swmidi.close_event);
+
     swmidi.open = FALSE;

LeaveCriticalSection(&swmidi.cs);