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winemac: Simplify format_for_type() and callers since there's at most one format...
[wine.git] / dlls / dmime / graph.c
blob58daf2092f81cfbdd9bb1d112a0c11dbce7ac607
1 /* IDirectMusicGraph
2 *
3 * Copyright (C) 2003-2004 Rok Mandeljc
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
18 */
19
20 #include "dmime_private.h"
21 #include "dmobject.h"
22
23 WINE_DEFAULT_DEBUG_CHANNEL(dmime);
24 WINE_DECLARE_DEBUG_CHANNEL(dmfile);
25
26 struct IDirectMusicGraphImpl {
27 IDirectMusicGraph IDirectMusicGraph_iface;
28 struct dmobject dmobj;
29 LONG ref;
30 WORD num_tools;
31 struct list Tools;
32 };
33
34 static inline IDirectMusicGraphImpl *impl_from_IDirectMusicGraph(IDirectMusicGraph *iface)
35 {
36 return CONTAINING_RECORD(iface, IDirectMusicGraphImpl, IDirectMusicGraph_iface);
37 }
38
39 static inline IDirectMusicGraphImpl *impl_from_IDirectMusicObject(IDirectMusicObject *iface)
40 {
41 return CONTAINING_RECORD(iface, IDirectMusicGraphImpl, dmobj.IDirectMusicObject_iface);
42 }
43
44 static inline IDirectMusicGraphImpl *impl_from_IPersistStream(IPersistStream *iface)
45 {
46 return CONTAINING_RECORD(iface, IDirectMusicGraphImpl, dmobj.IPersistStream_iface);
47 }
48
49 static HRESULT WINAPI DirectMusicGraph_QueryInterface(IDirectMusicGraph *iface, REFIID riid, void **ret_iface)
50 {
51 IDirectMusicGraphImpl *This = impl_from_IDirectMusicGraph(iface);
52
53 TRACE("(%p, %s, %p)\n", This, debugstr_guid(riid), ret_iface);
54
55 *ret_iface = NULL;
56
57 if (IsEqualIID(riid, &IID_IUnknown) ||
58 IsEqualIID(riid, &IID_IDirectMusicGraph))
59 {
60 *ret_iface = &This->IDirectMusicGraph_iface;
61 }
62 else if (IsEqualIID(riid, &IID_IDirectMusicObject))
63 *ret_iface = &This->dmobj.IDirectMusicObject_iface;
64 else if (IsEqualIID(riid, &IID_IPersistStream))
65 *ret_iface = &This->dmobj.IPersistStream_iface;
66
67 if (*ret_iface)
68 {
69 IDirectMusicGraph_AddRef(iface);
70 return S_OK;
71 }
72
73 WARN("(%p, %s, %p): not found\n", This, debugstr_guid(riid), ret_iface);
74 return E_NOINTERFACE;
75 }
76
77 static ULONG WINAPI DirectMusicGraph_AddRef(IDirectMusicGraph *iface)
78 {
79 IDirectMusicGraphImpl *This = impl_from_IDirectMusicGraph(iface);
80 ULONG ref = InterlockedIncrement(&This->ref);
81
82 TRACE("(%p): %d\n", This, ref);
83
84 DMIME_LockModule();
85 return ref;
86 }
87
88 static ULONG WINAPI DirectMusicGraph_Release(IDirectMusicGraph *iface)
89 {
90 IDirectMusicGraphImpl *This = impl_from_IDirectMusicGraph(iface);
91 ULONG ref = InterlockedDecrement(&This->ref);
92
93 TRACE("(%p): %d\n", This, ref);
94
95 if (ref == 0)
96 HeapFree(GetProcessHeap(), 0, This);
97
98 DMIME_UnlockModule();
99 return ref;
100 }
101
102 static HRESULT WINAPI DirectMusicGraph_StampPMsg(IDirectMusicGraph *iface, DMUS_PMSG *msg)
103 {
104 IDirectMusicGraphImpl *This = impl_from_IDirectMusicGraph(iface);
105 FIXME("(%p, %p): stub\n", This, msg);
106 return S_OK;
107 }
108
109 static HRESULT WINAPI DirectMusicGraph_InsertTool(IDirectMusicGraph *iface, IDirectMusicTool* pTool, DWORD* pdwPChannels, DWORD cPChannels, LONG lIndex)
110 {
111 IDirectMusicGraphImpl *This = impl_from_IDirectMusicGraph(iface);
112 struct list* pEntry = NULL;
113 struct list* pPrevEntry = NULL;
114 LPDMUS_PRIVATE_GRAPH_TOOL pIt = NULL;
115 LPDMUS_PRIVATE_GRAPH_TOOL pNewTool = NULL;
116
117 FIXME("(%p, %p, %p, %d, %i): use of pdwPChannels\n", This, pTool, pdwPChannels, cPChannels, lIndex);
118
119 if (!pTool)
120 return E_POINTER;
121
122 if (lIndex < 0)
123 lIndex = This->num_tools + lIndex;
124
125 pPrevEntry = &This->Tools;
126 LIST_FOR_EACH(pEntry, &This->Tools)
127 {
128 pIt = LIST_ENTRY(pEntry, DMUS_PRIVATE_GRAPH_TOOL, entry);
129 if (pIt->dwIndex == lIndex)
130 return DMUS_E_ALREADY_EXISTS;
131
132 if (pIt->dwIndex > lIndex)
133 break ;
134 pPrevEntry = pEntry;
135 }
136
137 ++This->num_tools;
138 pNewTool = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(DMUS_PRIVATE_GRAPH_TOOL));
139 pNewTool->pTool = pTool;
140 pNewTool->dwIndex = lIndex;
141 IDirectMusicTool8_AddRef(pTool);
142 IDirectMusicTool8_Init(pTool, iface);
143 list_add_tail (pPrevEntry->next, &pNewTool->entry);
144
145 #if 0
146 DWORD dwNum = 0;
147 IDirectMusicTool8_GetMediaTypes(pTool, &dwNum);
148 #endif
149
150 return DS_OK;
151 }
152
153 static HRESULT WINAPI DirectMusicGraph_GetTool(IDirectMusicGraph *iface, DWORD dwIndex, IDirectMusicTool** ppTool)
154 {
155 IDirectMusicGraphImpl *This = impl_from_IDirectMusicGraph(iface);
156 struct list* pEntry = NULL;
157 LPDMUS_PRIVATE_GRAPH_TOOL pIt = NULL;
158
159 FIXME("(%p, %d, %p): stub\n", This, dwIndex, ppTool);
160
161 LIST_FOR_EACH (pEntry, &This->Tools)
162 {
163 pIt = LIST_ENTRY(pEntry, DMUS_PRIVATE_GRAPH_TOOL, entry);
164 if (pIt->dwIndex == dwIndex)
165 {
166 *ppTool = pIt->pTool;
167 if (*ppTool)
168 IDirectMusicTool_AddRef(*ppTool);
169 return S_OK;
170 }
171 if (pIt->dwIndex > dwIndex)
172 break ;
173 }
174
175 return DMUS_E_NOT_FOUND;
176 }
177
178 static HRESULT WINAPI DirectMusicGraph_RemoveTool(IDirectMusicGraph *iface, IDirectMusicTool* pTool)
179 {
180 IDirectMusicGraphImpl *This = impl_from_IDirectMusicGraph(iface);
181 FIXME("(%p, %p): stub\n", This, pTool);
182 return S_OK;
183 }
184
185 static const IDirectMusicGraphVtbl DirectMusicGraphVtbl =
186 {
187 DirectMusicGraph_QueryInterface,
188 DirectMusicGraph_AddRef,
189 DirectMusicGraph_Release,
190 DirectMusicGraph_StampPMsg,
191 DirectMusicGraph_InsertTool,
192 DirectMusicGraph_GetTool,
193 DirectMusicGraph_RemoveTool
194 };
195
196 static HRESULT WINAPI DirectMusicObject_ParseDescriptor(IDirectMusicObject *iface, IStream *pStream, DMUS_OBJECTDESC *pDesc)
197 {
198 IDirectMusicGraphImpl *This = impl_from_IDirectMusicObject(iface);
199 DMUS_PRIVATE_CHUNK Chunk;
200 DWORD StreamSize, StreamCount, ListSize[1], ListCount[1];
201 LARGE_INTEGER liMove; /* used when skipping chunks */
202
203 TRACE("(%p, %p, %p)\n", This, pStream, pDesc);
204
205 /* FIXME: should this be determined from stream? */
206 pDesc->dwValidData |= DMUS_OBJ_CLASS;
207 pDesc->guidClass = CLSID_DirectMusicGraph;
208
209 IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
210 TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
211 switch (Chunk.fccID) {
212 case FOURCC_RIFF: {
213 IStream_Read (pStream, &Chunk.fccID, sizeof(FOURCC), NULL);
214 TRACE_(dmfile)(": RIFF chunk of type %s", debugstr_fourcc(Chunk.fccID));
215 StreamSize = Chunk.dwSize - sizeof(FOURCC);
216 StreamCount = 0;
217 if (Chunk.fccID == DMUS_FOURCC_TOOLGRAPH_FORM) {
218 TRACE_(dmfile)(": graph form\n");
219 do {
220 IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
221 StreamCount += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
222 TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
223 switch (Chunk.fccID) {
224 case DMUS_FOURCC_GUID_CHUNK: {
225 TRACE_(dmfile)(": GUID chunk\n");
226 pDesc->dwValidData |= DMUS_OBJ_OBJECT;
227 IStream_Read (pStream, &pDesc->guidObject, Chunk.dwSize, NULL);
228 break;
229 }
230 case DMUS_FOURCC_VERSION_CHUNK: {
231 TRACE_(dmfile)(": version chunk\n");
232 pDesc->dwValidData |= DMUS_OBJ_VERSION;
233 IStream_Read (pStream, &pDesc->vVersion, Chunk.dwSize, NULL);
234 break;
235 }
236 case DMUS_FOURCC_CATEGORY_CHUNK: {
237 TRACE_(dmfile)(": category chunk\n");
238 pDesc->dwValidData |= DMUS_OBJ_CATEGORY;
239 IStream_Read (pStream, pDesc->wszCategory, Chunk.dwSize, NULL);
240 break;
241 }
242 case FOURCC_LIST: {
243 IStream_Read (pStream, &Chunk.fccID, sizeof(FOURCC), NULL);
244 TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
245 ListSize[0] = Chunk.dwSize - sizeof(FOURCC);
246 ListCount[0] = 0;
247 switch (Chunk.fccID) {
248 /* evil M$ UNFO list, which can (!?) contain INFO elements */
249 case DMUS_FOURCC_UNFO_LIST: {
250 TRACE_(dmfile)(": UNFO list\n");
251 do {
252 IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
253 ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
254 TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
255 switch (Chunk.fccID) {
256 /* don't ask me why, but M$ puts INFO elements in UNFO list sometimes
257 (though strings seem to be valid unicode) */
258 case mmioFOURCC('I','N','A','M'):
259 case DMUS_FOURCC_UNAM_CHUNK: {
260 TRACE_(dmfile)(": name chunk\n");
261 pDesc->dwValidData |= DMUS_OBJ_NAME;
262 IStream_Read (pStream, pDesc->wszName, Chunk.dwSize, NULL);
263 break;
264 }
265 case mmioFOURCC('I','A','R','T'):
266 case DMUS_FOURCC_UART_CHUNK: {
267 TRACE_(dmfile)(": artist chunk (ignored)\n");
268 liMove.QuadPart = Chunk.dwSize;
269 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
270 break;
271 }
272 case mmioFOURCC('I','C','O','P'):
273 case DMUS_FOURCC_UCOP_CHUNK: {
274 TRACE_(dmfile)(": copyright chunk (ignored)\n");
275 liMove.QuadPart = Chunk.dwSize;
276 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
277 break;
278 }
279 case mmioFOURCC('I','S','B','J'):
280 case DMUS_FOURCC_USBJ_CHUNK: {
281 TRACE_(dmfile)(": subject chunk (ignored)\n");
282 liMove.QuadPart = Chunk.dwSize;
283 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
284 break;
285 }
286 case mmioFOURCC('I','C','M','T'):
287 case DMUS_FOURCC_UCMT_CHUNK: {
288 TRACE_(dmfile)(": comment chunk (ignored)\n");
289 liMove.QuadPart = Chunk.dwSize;
290 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
291 break;
292 }
293 default: {
294 TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
295 liMove.QuadPart = Chunk.dwSize;
296 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
297 break;
298 }
299 }
300 TRACE_(dmfile)(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
301 } while (ListCount[0] < ListSize[0]);
302 break;
303 }
304 default: {
305 TRACE_(dmfile)(": unknown (skipping)\n");
306 liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
307 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
308 break;
309 }
310 }
311 break;
312 }
313 default: {
314 TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
315 liMove.QuadPart = Chunk.dwSize;
316 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
317 break;
318 }
319 }
320 TRACE_(dmfile)(": StreamCount[0] = %d < StreamSize[0] = %d\n", StreamCount, StreamSize);
321 } while (StreamCount < StreamSize);
322 } else {
323 TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
324 liMove.QuadPart = StreamSize;
325 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
326 return E_FAIL;
327 }
328
329 TRACE_(dmfile)(": reading finished\n");
330 break;
331 }
332 default: {
333 TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
334 liMove.QuadPart = Chunk.dwSize;
335 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
336 return DMUS_E_INVALIDFILE;
337 }
338 }
339
340 TRACE(": returning descriptor:\n%s\n", debugstr_DMUS_OBJECTDESC (pDesc));
341
342 return S_OK;
343 }
344
345 static const IDirectMusicObjectVtbl dmobject_vtbl = {
346 dmobj_IDirectMusicObject_QueryInterface,
347 dmobj_IDirectMusicObject_AddRef,
348 dmobj_IDirectMusicObject_Release,
349 dmobj_IDirectMusicObject_GetDescriptor,
350 dmobj_IDirectMusicObject_SetDescriptor,
351 DirectMusicObject_ParseDescriptor
352 };
353
354 static HRESULT WINAPI PersistStream_Load(IPersistStream *iface, IStream* pStm)
355 {
356 IDirectMusicGraphImpl *This = impl_from_IPersistStream(iface);
357 FOURCC chunkID;
358 DWORD chunkSize, StreamSize, StreamCount, ListSize[3], ListCount[3];
359 LARGE_INTEGER liMove; /* used when skipping chunks */
360
361 FIXME("(%p, %p): Loading not implemented yet\n", This, pStm);
362 IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);
363 IStream_Read (pStm, &chunkSize, sizeof(DWORD), NULL);
364 TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (chunkID), chunkSize);
365 switch (chunkID) {
366 case FOURCC_RIFF: {
367 IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);
368 TRACE_(dmfile)(": RIFF chunk of type %s", debugstr_fourcc(chunkID));
369 StreamSize = chunkSize - sizeof(FOURCC);
370 StreamCount = 0;
371 switch (chunkID) {
372 case DMUS_FOURCC_TOOLGRAPH_FORM: {
373 TRACE_(dmfile)(": graph form\n");
374 do {
375 IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);
376 IStream_Read (pStm, &chunkSize, sizeof(FOURCC), NULL);
377 StreamCount += sizeof(FOURCC) + sizeof(DWORD) + chunkSize;
378 TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (chunkID), chunkSize);
379 switch (chunkID) {
380 case DMUS_FOURCC_GUID_CHUNK: {
381 TRACE_(dmfile)(": GUID chunk\n");
382 This->dmobj.desc.dwValidData |= DMUS_OBJ_OBJECT;
383 IStream_Read (pStm, &This->dmobj.desc.guidObject, chunkSize, NULL);
384 break;
385 }
386 case DMUS_FOURCC_VERSION_CHUNK: {
387 TRACE_(dmfile)(": version chunk\n");
388 This->dmobj.desc.dwValidData |= DMUS_OBJ_VERSION;
389 IStream_Read (pStm, &This->dmobj.desc.vVersion, chunkSize, NULL);
390 break;
391 }
392 case DMUS_FOURCC_CATEGORY_CHUNK: {
393 TRACE_(dmfile)(": category chunk\n");
394 This->dmobj.desc.dwValidData |= DMUS_OBJ_CATEGORY;
395 IStream_Read (pStm, This->dmobj.desc.wszCategory, chunkSize, NULL);
396 break;
397 }
398 case FOURCC_LIST: {
399 IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);
400 TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(chunkID));
401 ListSize[0] = chunkSize - sizeof(FOURCC);
402 ListCount[0] = 0;
403 switch (chunkID) {
404 case DMUS_FOURCC_UNFO_LIST: {
405 TRACE_(dmfile)(": UNFO list\n");
406 do {
407 IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);
408 IStream_Read (pStm, &chunkSize, sizeof(FOURCC), NULL);
409 ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + chunkSize;
410 TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (chunkID), chunkSize);
411 switch (chunkID) {
412 /* don't ask me why, but M$ puts INFO elements in UNFO list sometimes
413 (though strings seem to be valid unicode) */
414 case mmioFOURCC('I','N','A','M'):
415 case DMUS_FOURCC_UNAM_CHUNK: {
416 TRACE_(dmfile)(": name chunk\n");
417 This->dmobj.desc.dwValidData |= DMUS_OBJ_NAME;
418 IStream_Read (pStm, This->dmobj.desc.wszName, chunkSize, NULL);
419 break;
420 }
421 case mmioFOURCC('I','A','R','T'):
422 case DMUS_FOURCC_UART_CHUNK: {
423 TRACE_(dmfile)(": artist chunk (ignored)\n");
424 liMove.QuadPart = chunkSize;
425 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
426 break;
427 }
428 case mmioFOURCC('I','C','O','P'):
429 case DMUS_FOURCC_UCOP_CHUNK: {
430 TRACE_(dmfile)(": copyright chunk (ignored)\n");
431 liMove.QuadPart = chunkSize;
432 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
433 break;
434 }
435 case mmioFOURCC('I','S','B','J'):
436 case DMUS_FOURCC_USBJ_CHUNK: {
437 TRACE_(dmfile)(": subject chunk (ignored)\n");
438 liMove.QuadPart = chunkSize;
439 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
440 break;
441 }
442 case mmioFOURCC('I','C','M','T'):
443 case DMUS_FOURCC_UCMT_CHUNK: {
444 TRACE_(dmfile)(": comment chunk (ignored)\n");
445 liMove.QuadPart = chunkSize;
446 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
447 break;
448 }
449 default: {
450 TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
451 liMove.QuadPart = chunkSize;
452 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
453 break;
454 }
455 }
456 TRACE_(dmfile)(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
457 } while (ListCount[0] < ListSize[0]);
458 break;
459 }
460 default: {
461 TRACE_(dmfile)(": unknown (skipping)\n");
462 liMove.QuadPart = chunkSize - sizeof(FOURCC);
463 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
464 break;
465 }
466 }
467 break;
468 }
469 default: {
470 TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
471 liMove.QuadPart = chunkSize;
472 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
473 break;
474 }
475 }
476 TRACE_(dmfile)(": StreamCount[0] = %d < StreamSize[0] = %d\n", StreamCount, StreamSize);
477 } while (StreamCount < StreamSize);
478 break;
479 }
480 default: {
481 TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
482 liMove.QuadPart = StreamSize;
483 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
484 return E_FAIL;
485 }
486 }
487 TRACE_(dmfile)(": reading finished\n");
488 break;
489 }
490 default: {
491 TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
492 liMove.QuadPart = chunkSize;
493 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
494 return E_FAIL;
495 }
496 }
497
498 return S_OK;
499 }
500
501 static const IPersistStreamVtbl persiststream_vtbl = {
502 dmobj_IPersistStream_QueryInterface,
503 dmobj_IPersistStream_AddRef,
504 dmobj_IPersistStream_Release,
505 dmobj_IPersistStream_GetClassID,
506 unimpl_IPersistStream_IsDirty,
507 PersistStream_Load,
508 unimpl_IPersistStream_Save,
509 unimpl_IPersistStream_GetSizeMax
510 };
511
512 /* for ClassFactory */
513 HRESULT WINAPI create_dmgraph(REFIID riid, void **ret_iface)
514 {
515 IDirectMusicGraphImpl* obj;
516 HRESULT hr;
517
518 *ret_iface = NULL;
519
520 obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicGraphImpl));
521 if (!obj)
522 return E_OUTOFMEMORY;
523
524 obj->IDirectMusicGraph_iface.lpVtbl = &DirectMusicGraphVtbl;
525 obj->ref = 1;
526 dmobject_init(&obj->dmobj, &CLSID_DirectMusicGraph, (IUnknown *)&obj->IDirectMusicGraph_iface);
527 obj->dmobj.IDirectMusicObject_iface.lpVtbl = &dmobject_vtbl;
528 obj->dmobj.IPersistStream_iface.lpVtbl = &persiststream_vtbl;
529 list_init(&obj->Tools);
530
531 hr = IDirectMusicGraph_QueryInterface(&obj->IDirectMusicGraph_iface, riid, ret_iface);
532 IDirectMusicGraph_Release(&obj->IDirectMusicGraph_iface);
533
534 return hr;
535 }
Windows API implementation