Create a skeleton SAPI TtsEngine COM object.

src/windows/com/ttsengine.cpp

@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2016 Reece H. Dunn
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see: <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <windows.h>
+#include <sapiddk.h>
+
+#include <new>
+
+extern "C" ULONG ObjectCount;
+
+struct TtsEngine
+	: public ISpObjectWithToken
+	, public ISpTTSEngine
+{
+	TtsEngine();
+	~TtsEngine();
+
+	// IUnknown
+
+	ULONG __stdcall AddRef();
+	ULONG __stdcall Release();
+
+	HRESULT __stdcall QueryInterface(REFIID iid, void **object);
+
+	// ISpObjectWithToken
+
+	HRESULT __stdcall GetObjectToken(ISpObjectToken **token);
+	HRESULT __stdcall SetObjectToken(ISpObjectToken *token);
+
+	// ISpTTSEngine
+
+	HRESULT __stdcall
+	Speak(DWORD flags,
+	      REFGUID formatId,
+	      const WAVEFORMATEX *format,
+	      const SPVTEXTFRAG *textFragList,
+	      ISpTTSEngineSite *site);
+
+	HRESULT __stdcall
+	GetOutputFormat(const GUID *targetFormatId,
+	                const WAVEFORMATEX *targetFormat,
+	                GUID *formatId,
+	                WAVEFORMATEX **format);
+private:
+	ULONG refCount;
+};
+
+TtsEngine::TtsEngine()
+	: refCount(1)
+{
+	InterlockedIncrement(&ObjectCount);
+}
+
+TtsEngine::~TtsEngine()
+{
+	InterlockedDecrement(&ObjectCount);
+}
+
+ULONG __stdcall TtsEngine::AddRef()
+{
+	return InterlockedIncrement(&refCount);
+}
+
+ULONG __stdcall TtsEngine::Release()
+{
+	ULONG ret = InterlockedDecrement(&refCount);
+	if (ret == 0)
+		delete this;
+	return ret;
+}
+
+HRESULT __stdcall TtsEngine::QueryInterface(REFIID iid, void **object)
+{
+	*object = NULL;
+	if (IsEqualIID(iid, IID_IUnknown) || IsEqualIID(iid, IID_ISpTTSEngine))
+		*object = (ISpTTSEngine *)this;
+	else if (IsEqualIID(iid, IID_ISpObjectWithToken))
+		*object = (ISpObjectWithToken *)this;
+	else
+		return E_NOINTERFACE;
+
+	this->AddRef();
+	return S_OK;
+}
+
+HRESULT __stdcall TtsEngine::GetObjectToken(ISpObjectToken **token)
+{
+	return E_NOTIMPL;
+}
+
+HRESULT __stdcall TtsEngine::SetObjectToken(ISpObjectToken *token)
+{
+	return E_NOTIMPL;
+}
+
+HRESULT __stdcall
+TtsEngine::Speak(DWORD flags,
+                 REFGUID formatId,
+                 const WAVEFORMATEX *format,
+                 const SPVTEXTFRAG *textFragList,
+                 ISpTTSEngineSite *site)
+{
+	return E_NOTIMPL;
+}
+
+HRESULT __stdcall
+TtsEngine::GetOutputFormat(const GUID *targetFormatId,
+                           const WAVEFORMATEX *targetFormat,
+                           GUID *formatId,
+                           WAVEFORMATEX **format)
+{
+	return E_NOTIMPL;
+}
+
+extern "C" HRESULT __stdcall TtsEngine_CreateInstance(IClassFactory *iface, IUnknown *outer, REFIID iid, void **object)
+{
+	if (outer != NULL)
+		return CLASS_E_NOAGGREGATION;
+
+	TtsEngine *engine = new (std::nothrow) TtsEngine();
+	if (!engine)
+		return E_OUTOFMEMORY;
+
+	HRESULT ret = engine->QueryInterface(iid, object);
+	engine->Release();
+	return ret;
+}