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1 /*
2  * DirectShow capture interface
3  * Copyright (c) 2010 Ramiro Polla
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 #include "dshow_capture.h"
23
24 #include <stddef.h>
25 #define imemoffset offsetof(libAVPin, imemvtbl)
26
27 DECLARE_QUERYINTERFACE(libAVPin,
28     { {&IID_IUnknown,0}, {&IID_IPin,0}, {&IID_IMemInputPin,imemoffset} })
29 DECLARE_ADDREF(libAVPin)
30 DECLARE_RELEASE(libAVPin)
31
32 long WINAPI
33 libAVPin_Connect(libAVPin *this, IPin *pin, const AM_MEDIA_TYPE *type)
34 {
35     dshowdebug("libAVPin_Connect(%p, %p, %p)\n", this, pin, type);
36     /* Input pins receive connections. */
37     return S_FALSE;
38 }
39 long WINAPI
40 libAVPin_ReceiveConnection(libAVPin *this, IPin *pin,
41                            const AM_MEDIA_TYPE *type)
42 {
43     enum dshowDeviceType devtype = this->filter->type;
44     dshowdebug("libAVPin_ReceiveConnection(%p)\n", this);
45
46     if (!pin)
47         return E_POINTER;
48     if (this->connectedto)
49         return VFW_E_ALREADY_CONNECTED;
50
51     ff_print_AM_MEDIA_TYPE(type);
52     if (devtype == VideoDevice) {
53         if (!IsEqualGUID(&type->majortype, &MEDIATYPE_Video))
54             return VFW_E_TYPE_NOT_ACCEPTED;
55     } else {
56         if (!IsEqualGUID(&type->majortype, &MEDIATYPE_Audio))
57             return VFW_E_TYPE_NOT_ACCEPTED;
58     }
59
60     IPin_AddRef(pin);
61     this->connectedto = pin;
62
63     ff_copy_dshow_media_type(&this->type, type);
64
65     return S_OK;
66 }
67 long WINAPI
68 libAVPin_Disconnect(libAVPin *this)
69 {
70     dshowdebug("libAVPin_Disconnect(%p)\n", this);
71
72     if (this->filter->state != State_Stopped)
73         return VFW_E_NOT_STOPPED;
74     if (!this->connectedto)
75         return S_FALSE;
76     IPin_Release(this->connectedto);
77     this->connectedto = NULL;
78
79     return S_OK;
80 }
81 long WINAPI
82 libAVPin_ConnectedTo(libAVPin *this, IPin **pin)
83 {
84     dshowdebug("libAVPin_ConnectedTo(%p)\n", this);
85
86     if (!pin)
87         return E_POINTER;
88     if (!this->connectedto)
89         return VFW_E_NOT_CONNECTED;
90     IPin_AddRef(this->connectedto);
91     *pin = this->connectedto;
92
93     return S_OK;
94 }
95 long WINAPI
96 libAVPin_ConnectionMediaType(libAVPin *this, AM_MEDIA_TYPE *type)
97 {
98     dshowdebug("libAVPin_ConnectionMediaType(%p)\n", this);
99
100     if (!type)
101         return E_POINTER;
102     if (!this->connectedto)
103         return VFW_E_NOT_CONNECTED;
104
105     return ff_copy_dshow_media_type(type, &this->type);
106 }
107 long WINAPI
108 libAVPin_QueryPinInfo(libAVPin *this, PIN_INFO *info)
109 {
110     dshowdebug("libAVPin_QueryPinInfo(%p)\n", this);
111
112     if (!info)
113         return E_POINTER;
114
115     if (this->filter)
116         libAVFilter_AddRef(this->filter);
117
118     info->pFilter = (IBaseFilter *) this->filter;
119     info->dir     = PINDIR_INPUT;
120     wcscpy(info->achName, L"Capture");
121
122     return S_OK;
123 }
124 long WINAPI
125 libAVPin_QueryDirection(libAVPin *this, PIN_DIRECTION *dir)
126 {
127     dshowdebug("libAVPin_QueryDirection(%p)\n", this);
128     if (!dir)
129         return E_POINTER;
130     *dir = PINDIR_INPUT;
131     return S_OK;
132 }
133 long WINAPI
134 libAVPin_QueryId(libAVPin *this, wchar_t **id)
135 {
136     dshowdebug("libAVPin_QueryId(%p)\n", this);
137
138     if (!id)
139         return E_POINTER;
140
141     *id = wcsdup(L"libAV Pin");
142
143     return S_OK;
144 }
145 long WINAPI
146 libAVPin_QueryAccept(libAVPin *this, const AM_MEDIA_TYPE *type)
147 {
148     dshowdebug("libAVPin_QueryAccept(%p)\n", this);
149     return S_FALSE;
150 }
151 long WINAPI
152 libAVPin_EnumMediaTypes(libAVPin *this, IEnumMediaTypes **enumtypes)
153 {
154     const AM_MEDIA_TYPE *type = NULL;
155     libAVEnumMediaTypes *new;
156     dshowdebug("libAVPin_EnumMediaTypes(%p)\n", this);
157
158     if (!enumtypes)
159         return E_POINTER;
160     new = libAVEnumMediaTypes_Create(type);
161     if (!new)
162         return E_OUTOFMEMORY;
163
164     *enumtypes = (IEnumMediaTypes *) new;
165     return S_OK;
166 }
167 long WINAPI
168 libAVPin_QueryInternalConnections(libAVPin *this, IPin **pin,
169                                   unsigned long *npin)
170 {
171     dshowdebug("libAVPin_QueryInternalConnections(%p)\n", this);
172     return E_NOTIMPL;
173 }
174 long WINAPI
175 libAVPin_EndOfStream(libAVPin *this)
176 {
177     dshowdebug("libAVPin_EndOfStream(%p)\n", this);
178     /* I don't care. */
179     return S_OK;
180 }
181 long WINAPI
182 libAVPin_BeginFlush(libAVPin *this)
183 {
184     dshowdebug("libAVPin_BeginFlush(%p)\n", this);
185     /* I don't care. */
186     return S_OK;
187 }
188 long WINAPI
189 libAVPin_EndFlush(libAVPin *this)
190 {
191     dshowdebug("libAVPin_EndFlush(%p)\n", this);
192     /* I don't care. */
193     return S_OK;
194 }
195 long WINAPI
196 libAVPin_NewSegment(libAVPin *this, REFERENCE_TIME start, REFERENCE_TIME stop,
197                     double rate)
198 {
199     dshowdebug("libAVPin_NewSegment(%p)\n", this);
200     /* I don't care. */
201     return S_OK;
202 }
203
204 static int
205 libAVPin_Setup(libAVPin *this, libAVFilter *filter)
206 {
207     IPinVtbl *vtbl = this->vtbl;
208     IMemInputPinVtbl *imemvtbl;
209
210     if (!filter)
211         return 0;
212
213     imemvtbl = av_malloc(sizeof(IMemInputPinVtbl));
214     if (!imemvtbl)
215         return 0;
216
217     SETVTBL(imemvtbl, libAVMemInputPin, QueryInterface);
218     SETVTBL(imemvtbl, libAVMemInputPin, AddRef);
219     SETVTBL(imemvtbl, libAVMemInputPin, Release);
220     SETVTBL(imemvtbl, libAVMemInputPin, GetAllocator);
221     SETVTBL(imemvtbl, libAVMemInputPin, NotifyAllocator);
222     SETVTBL(imemvtbl, libAVMemInputPin, GetAllocatorRequirements);
223     SETVTBL(imemvtbl, libAVMemInputPin, Receive);
224     SETVTBL(imemvtbl, libAVMemInputPin, ReceiveMultiple);
225     SETVTBL(imemvtbl, libAVMemInputPin, ReceiveCanBlock);
226
227     this->imemvtbl = imemvtbl;
228
229     SETVTBL(vtbl, libAVPin, QueryInterface);
230     SETVTBL(vtbl, libAVPin, AddRef);
231     SETVTBL(vtbl, libAVPin, Release);
232     SETVTBL(vtbl, libAVPin, Connect);
233     SETVTBL(vtbl, libAVPin, ReceiveConnection);
234     SETVTBL(vtbl, libAVPin, Disconnect);
235     SETVTBL(vtbl, libAVPin, ConnectedTo);
236     SETVTBL(vtbl, libAVPin, ConnectionMediaType);
237     SETVTBL(vtbl, libAVPin, QueryPinInfo);
238     SETVTBL(vtbl, libAVPin, QueryDirection);
239     SETVTBL(vtbl, libAVPin, QueryId);
240     SETVTBL(vtbl, libAVPin, QueryAccept);
241     SETVTBL(vtbl, libAVPin, EnumMediaTypes);
242     SETVTBL(vtbl, libAVPin, QueryInternalConnections);
243     SETVTBL(vtbl, libAVPin, EndOfStream);
244     SETVTBL(vtbl, libAVPin, BeginFlush);
245     SETVTBL(vtbl, libAVPin, EndFlush);
246     SETVTBL(vtbl, libAVPin, NewSegment);
247
248     this->filter = filter;
249
250     return 1;
251 }
252 DECLARE_CREATE(libAVPin, libAVPin_Setup(this, filter), libAVFilter *filter)
253 DECLARE_DESTROY(libAVPin, nothing)
254
255 /*****************************************************************************
256  * libAVMemInputPin
257  ****************************************************************************/
258 long WINAPI
259 libAVMemInputPin_QueryInterface(libAVMemInputPin *this, const GUID *riid,
260                                 void **ppvObject)
261 {
262     libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
263     dshowdebug("libAVMemInputPin_QueryInterface(%p)\n", this);
264     return libAVPin_QueryInterface(pin, riid, ppvObject);
265 }
266 unsigned long WINAPI
267 libAVMemInputPin_AddRef(libAVMemInputPin *this)
268 {
269     libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
270     dshowdebug("libAVMemInputPin_AddRef(%p)\n", this);
271     return libAVPin_AddRef(pin);
272 }
273 unsigned long WINAPI
274 libAVMemInputPin_Release(libAVMemInputPin *this)
275 {
276     libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
277     dshowdebug("libAVMemInputPin_Release(%p)\n", this);
278     return libAVPin_Release(pin);
279 }
280 long WINAPI
281 libAVMemInputPin_GetAllocator(libAVMemInputPin *this, IMemAllocator **alloc)
282 {
283     dshowdebug("libAVMemInputPin_GetAllocator(%p)\n", this);
284     return VFW_E_NO_ALLOCATOR;
285 }
286 long WINAPI
287 libAVMemInputPin_NotifyAllocator(libAVMemInputPin *this, IMemAllocator *alloc,
288                                  BOOL rdwr)
289 {
290     dshowdebug("libAVMemInputPin_NotifyAllocator(%p)\n", this);
291     return S_OK;
292 }
293 long WINAPI
294 libAVMemInputPin_GetAllocatorRequirements(libAVMemInputPin *this,
295                                           ALLOCATOR_PROPERTIES *props)
296 {
297     dshowdebug("libAVMemInputPin_GetAllocatorRequirements(%p)\n", this);
298     return E_NOTIMPL;
299 }
300 long WINAPI
301 libAVMemInputPin_Receive(libAVMemInputPin *this, IMediaSample *sample)
302 {
303     libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
304     enum dshowDeviceType devtype = pin->filter->type;
305     void *priv_data;
306     uint8_t *buf;
307     int buf_size;
308     int index;
309     int64_t curtime;
310
311     dshowdebug("libAVMemInputPin_Receive(%p)\n", this);
312
313     if (!sample)
314         return E_POINTER;
315
316     if (devtype == VideoDevice) {
317         /* PTS from video devices is unreliable. */
318         IReferenceClock *clock = pin->filter->clock;
319         IReferenceClock_GetTime(clock, &curtime);
320     } else {
321         int64_t dummy;
322         IMediaSample_GetTime(sample, &curtime, &dummy);
323         curtime += pin->filter->start_time;
324     }
325
326     buf_size = IMediaSample_GetActualDataLength(sample);
327     IMediaSample_GetPointer(sample, &buf);
328     priv_data = pin->filter->priv_data;
329     index = pin->filter->stream_index;
330
331     pin->filter->callback(priv_data, index, buf, buf_size, curtime);
332
333     return S_OK;
334 }
335 long WINAPI
336 libAVMemInputPin_ReceiveMultiple(libAVMemInputPin *this,
337                                  IMediaSample **samples, long n, long *nproc)
338 {
339     int i;
340     dshowdebug("libAVMemInputPin_ReceiveMultiple(%p)\n", this);
341
342     for (i = 0; i < n; i++)
343         libAVMemInputPin_Receive(this, samples[i]);
344
345     *nproc = n;
346     return S_OK;
347 }
348 long WINAPI
349 libAVMemInputPin_ReceiveCanBlock(libAVMemInputPin *this)
350 {
351     dshowdebug("libAVMemInputPin_ReceiveCanBlock(%p)\n", this);
352     /* I swear I will not block. */
353     return S_FALSE;
354 }
355
356 void
357 libAVMemInputPin_Destroy(libAVMemInputPin *this)
358 {
359     libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
360     dshowdebug("libAVMemInputPin_Destroy(%p)\n", this);
361     libAVPin_Destroy(pin);
362 }