1 /*
2 * Generic Implementation of IPin Interface
3 *
4 * Copyright 2003 Robert Shearman
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include <stdarg.h>
22
23 #define COBJMACROS
24
25 #include "windef.h"
26 #include "winbase.h"
27 #include "wtypes.h"
28 #include "wingdi.h"
29 #include "winuser.h"
30 #include "dshow.h"
31
32 #include "qcap_main.h"
33 #include "pin.h"
34
35 #include "wine/debug.h"
36 #include "wine/unicode.h"
37 #include "uuids.h"
38 #include "vfwmsgs.h"
39 #include <assert.h>
40
41 WINE_DEFAULT_DEBUG_CHANNEL(qcap);
42
43 #define ALIGNDOWN(value,boundary) ((value) & ~(boundary-1))
44 #define ALIGNUP(value,boundary) (ALIGNDOWN(value - 1, boundary) + boundary)
45
46 static void Copy_PinInfo(PIN_INFO * pDest, const PIN_INFO * pSrc)
47 {
48 /* Tempting to just do a memcpy, but the name field is
49 128 characters long! We will probably never exceed 10
50 most of the time, so we are better off copying
51 each field manually */
52 strcpyW(pDest->achName, pSrc->achName);
53 pDest->dir = pSrc->dir;
54 pDest->pFilter = pSrc->pFilter;
55 }
56
57 HRESULT WINAPI IPinImpl_ConnectedTo(IPin * iface, IPin ** ppPin)
58 {
59 HRESULT hr;
60 IPinImpl *This = (IPinImpl *)iface;
61
62 /* TRACE("(%p)\n", ppPin);*/
63
64 EnterCriticalSection(This->pCritSec);
65 {
66 if (This->pConnectedTo)
67 {
68 *ppPin = This->pConnectedTo;
69 IPin_AddRef(*ppPin);
70 hr = S_OK;
71 }
72 else
73 hr = VFW_E_NOT_CONNECTED;
74 }
75 LeaveCriticalSection(This->pCritSec);
76
77 return hr;
78 }
79
80 HRESULT WINAPI IPinImpl_ConnectionMediaType(IPin * iface, AM_MEDIA_TYPE * pmt)
81 {
82 HRESULT hr;
83 IPinImpl *This = (IPinImpl *)iface;
84
85 TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
86
87 EnterCriticalSection(This->pCritSec);
88 {
89 if (This->pConnectedTo)
90 {
91 CopyMediaType(pmt, &This->mtCurrent);
92 hr = S_OK;
93 }
94 else
95 {
96 ZeroMemory(pmt, sizeof(*pmt));
97 hr = VFW_E_NOT_CONNECTED;
98 }
99 }
100 LeaveCriticalSection(This->pCritSec);
101
102 return hr;
103 }
104
105 HRESULT WINAPI IPinImpl_QueryPinInfo(IPin * iface, PIN_INFO * pInfo)
106 {
107 IPinImpl *This = (IPinImpl *)iface;
108
109 TRACE("(%p/%p)->(%p)\n", This, iface, pInfo);
110
111 Copy_PinInfo(pInfo, &This->pinInfo);
112 IBaseFilter_AddRef(pInfo->pFilter);
113
114 return S_OK;
115 }
116
117 HRESULT WINAPI IPinImpl_QueryDirection(IPin * iface, PIN_DIRECTION * pPinDir)
118 {
119 IPinImpl *This = (IPinImpl *)iface;
120
121 TRACE("(%p/%p)->(%p)\n", This, iface, pPinDir);
122
123 *pPinDir = This->pinInfo.dir;
124
125 return S_OK;
126 }
127
128 HRESULT WINAPI IPinImpl_QueryId(IPin * iface, LPWSTR * Id)
129 {
130 IPinImpl *This = (IPinImpl *)iface;
131
132 TRACE("(%p/%p)->(%p)\n", This, iface, Id);
133
134 *Id = CoTaskMemAlloc((strlenW(This->pinInfo.achName) + 1) * sizeof(WCHAR));
135 if (!*Id)
136 return E_OUTOFMEMORY;
137
138 strcpyW(*Id, This->pinInfo.achName);
139
140 return S_OK;
141 }
142
143 HRESULT WINAPI IPinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
144 {
145 IPinImpl *This = (IPinImpl *)iface;
146
147 TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
148
149 if (!This->fnQueryAccept) return S_OK;
150
151 return (This->fnQueryAccept(This->pUserData, pmt) == S_OK ? S_OK : S_FALSE);
152 }
153
154 /* Function called as a helper to IPin_Connect */
155 /* specific AM_MEDIA_TYPE - it cannot be NULL */
156 /* NOTE: not part of standard interface */
157 static HRESULT OutputPin_ConnectSpecific(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
158 {
159 OutputPin *This = (OutputPin *)iface;
160 HRESULT hr;
161 IMemAllocator * pMemAlloc = NULL;
162 ALLOCATOR_PROPERTIES actual; /* FIXME: should we put the actual props back in to This? */
163
164 TRACE("(%p, %p)\n", pReceivePin, pmt);
165 dump_AM_MEDIA_TYPE(pmt);
166
167 /* FIXME: call queryacceptproc */
168
169 This->pin.pConnectedTo = pReceivePin;
170 IPin_AddRef(pReceivePin);
171 CopyMediaType(&This->pin.mtCurrent, pmt);
172
173 hr = IPin_ReceiveConnection(pReceivePin, iface, pmt);
174
175 /* get the IMemInputPin interface we will use to deliver samples to the
176 * connected pin */
177 if (SUCCEEDED(hr))
178 {
179 hr = IPin_QueryInterface(pReceivePin, &IID_IMemInputPin, (LPVOID)&This->pMemInputPin);
180
181 if (SUCCEEDED(hr))
182 hr = IMemInputPin_GetAllocator(This->pMemInputPin, &pMemAlloc);
183
184 if (hr == VFW_E_NO_ALLOCATOR)
185 {
186 /* Input pin provides no allocator, use standard memory allocator */
187 hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC_SERVER, &IID_IMemAllocator, (LPVOID*)&pMemAlloc);
188
189 if (SUCCEEDED(hr))
190 {
191 hr = IMemInputPin_NotifyAllocator(This->pMemInputPin, pMemAlloc, FALSE);
192 }
193 }
194
195 if (SUCCEEDED(hr))
196 hr = IMemAllocator_SetProperties(pMemAlloc, &This->allocProps, &actual);
197
198 if (pMemAlloc)
199 IMemAllocator_Release(pMemAlloc);
200
201 /* break connection if we couldn't get the allocator */
202 if (FAILED(hr))
203 IPin_Disconnect(pReceivePin);
204 }
205
206 if (FAILED(hr))
207 {
208 IPin_Release(This->pin.pConnectedTo);
209 This->pin.pConnectedTo = NULL;
210 DeleteMediaType(&This->pin.mtCurrent);
211 }
212
213 TRACE(" -- %x\n", hr);
214 return hr;
215 }
216
217 HRESULT OutputPin_Init(const PIN_INFO * pPinInfo, const ALLOCATOR_PROPERTIES * props,
218 LPVOID pUserData, QUERYACCEPTPROC pQueryAccept,
219 LPCRITICAL_SECTION pCritSec, OutputPin * pPinImpl)
220 {
221 TRACE("\n");
222
223 /* Common attributes */
224 pPinImpl->pin.refCount = 1;
225 pPinImpl->pin.pConnectedTo = NULL;
226 pPinImpl->pin.fnQueryAccept = pQueryAccept;
227 pPinImpl->pin.pUserData = pUserData;
228 pPinImpl->pin.pCritSec = pCritSec;
229 Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
230
231 /* Output pin attributes */
232 pPinImpl->pMemInputPin = NULL;
233 pPinImpl->pConnectSpecific = OutputPin_ConnectSpecific;
234 if (props)
235 {
236 pPinImpl->allocProps = *props;
237 if (pPinImpl->allocProps.cbAlign == 0)
238 pPinImpl->allocProps.cbAlign = 1;
239 }
240 else
241 ZeroMemory(&pPinImpl->allocProps, sizeof(pPinImpl->allocProps));
242
243 return S_OK;
244 }
245
246 HRESULT WINAPI OutputPin_Connect(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
247 {
248 HRESULT hr;
249 OutputPin *This = (OutputPin *)iface;
250
251 TRACE("(%p/%p)->(%p, %p)\n", This, iface, pReceivePin, pmt);
252 dump_AM_MEDIA_TYPE(pmt);
253
254 /* If we try to connect to ourself, we will definitely deadlock.
255 * There are other cases where we could deadlock too, but this
256 * catches the obvious case */
257 assert(pReceivePin != iface);
258
259 EnterCriticalSection(This->pin.pCritSec);
260 {
261 /* if we have been a specific type to connect with, then we can either connect
262 * with that or fail. We cannot choose different AM_MEDIA_TYPE */
263 if (pmt && !IsEqualGUID(&pmt->majortype, &GUID_NULL) && !IsEqualGUID(&pmt->subtype, &GUID_NULL))
264 hr = This->pConnectSpecific(iface, pReceivePin, pmt);
265 else
266 {
267 /* negotiate media type */
268
269 IEnumMediaTypes * pEnumCandidates;
270 AM_MEDIA_TYPE * pmtCandidate; /* Candidate media type */
271
272 if (SUCCEEDED(hr = IPin_EnumMediaTypes(iface, &pEnumCandidates)))
273 {
274 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
275
276 /* try this filter's media types first */
277 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, NULL))
278 {
279 if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
280 (This->pConnectSpecific(iface, pReceivePin, pmtCandidate) == S_OK))
281 {
282 hr = S_OK;
283 TRACE("o_o\n");
284 DeleteMediaType(pmtCandidate);
285 break;
286 }
287 DeleteMediaType(pmtCandidate);
288 }
289 IEnumMediaTypes_Release(pEnumCandidates);
290 }
291
292 /* then try receiver filter's media types */
293 if (hr != S_OK && SUCCEEDED(hr = IPin_EnumMediaTypes(pReceivePin, &pEnumCandidates))) /* if we haven't already connected successfully */
294 {
295 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
296
297 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, NULL))
298 {
299 if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
300 (This->pConnectSpecific(iface, pReceivePin, pmtCandidate) == S_OK))
301 {
302 hr = S_OK;
303 DeleteMediaType(pmtCandidate);
304 break;
305 }
306 DeleteMediaType(pmtCandidate);
307 } /* while */
308 IEnumMediaTypes_Release(pEnumCandidates);
309 } /* if not found */
310 } /* if negotiate media type */
311 } /* if succeeded */
312 LeaveCriticalSection(This->pin.pCritSec);
313
314 TRACE(" -- %x\n", hr);
315 return hr;
316 }
317
318 HRESULT WINAPI OutputPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
319 {
320 ERR("Incoming connection on an output pin! (%p, %p)\n", pReceivePin, pmt);
321
322 return E_UNEXPECTED;
323 }
324
325 HRESULT WINAPI OutputPin_Disconnect(IPin * iface)
326 {
327 HRESULT hr;
328 OutputPin *This = (OutputPin *)iface;
329
330 TRACE("()\n");
331
332 EnterCriticalSection(This->pin.pCritSec);
333 {
334 if (This->pMemInputPin)
335 {
336 IMemInputPin_Release(This->pMemInputPin);
337 This->pMemInputPin = NULL;
338 }
339 if (This->pin.pConnectedTo)
340 {
341 IPin_Release(This->pin.pConnectedTo);
342 This->pin.pConnectedTo = NULL;
343 hr = S_OK;
344 }
345 else
346 hr = S_FALSE;
347 }
348 LeaveCriticalSection(This->pin.pCritSec);
349
350 return hr;
351 }
352
353 HRESULT OutputPin_GetDeliveryBuffer(OutputPin * This, IMediaSample ** ppSample, REFERENCE_TIME * tStart, REFERENCE_TIME * tStop, DWORD dwFlags)
354 {
355 HRESULT hr;
356
357 TRACE("(%p, %p, %p, %x)\n", ppSample, tStart, tStop, dwFlags);
358
359 EnterCriticalSection(This->pin.pCritSec);
360 {
361 if (!This->pin.pConnectedTo)
362 hr = VFW_E_NOT_CONNECTED;
363 else
364 {
365 IMemAllocator * pAlloc = NULL;
366
367 hr = IMemInputPin_GetAllocator(This->pMemInputPin, &pAlloc);
368
369 if (SUCCEEDED(hr))
370 hr = IMemAllocator_GetBuffer(pAlloc, ppSample, tStart, tStop, dwFlags);
371
372 if (SUCCEEDED(hr))
373 hr = IMediaSample_SetTime(*ppSample, tStart, tStop);
374
375 if (pAlloc)
376 IMemAllocator_Release(pAlloc);
377 }
378 }
379 LeaveCriticalSection(This->pin.pCritSec);
380
381 return hr;
382 }
383
384 HRESULT OutputPin_SendSample(OutputPin * This, IMediaSample * pSample)
385 {
386 HRESULT hr = S_OK;
387 IMemInputPin * pMemConnected = NULL;
388
389 EnterCriticalSection(This->pin.pCritSec);
390 {
391 if (!This->pin.pConnectedTo || !This->pMemInputPin)
392 hr = VFW_E_NOT_CONNECTED;
393 else
394 {
395 /* we don't have the lock held when using This->pMemInputPin,
396 * so we need to AddRef it to stop it being deleted while we are
397 * using it. */
398 pMemConnected = This->pMemInputPin;
399 IMemInputPin_AddRef(pMemConnected);
400 }
401 }
402 LeaveCriticalSection(This->pin.pCritSec);
403
404 if (SUCCEEDED(hr))
405 {
406 /* NOTE: if we are in a critical section when Receive is called
407 * then it causes some problems (most notably with the native Video
408 * Renderer) if we are re-entered for whatever reason */
409 hr = IMemInputPin_Receive(pMemConnected, pSample);
410 IMemInputPin_Release(pMemConnected);
411 }
412
413 return hr;
414 }
415
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