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dshow_pin.c
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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 
28  { {&IID_IUnknown,0}, {&IID_IPin,0}, {&IID_IMemInputPin,imemoffset} })
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
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 
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
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
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
169  unsigned long *npin)
170 {
171  dshowdebug("libAVPin_QueryInternalConnections(%p)\n", this);
172  return E_NOTIMPL;
173 }
174 long WINAPI
176 {
177  dshowdebug("libAVPin_EndOfStream(%p)\n", this);
178  /* I don't care. */
179  return S_OK;
180 }
181 long WINAPI
183 {
184  dshowdebug("libAVPin_BeginFlush(%p)\n", this);
185  /* I don't care. */
186  return S_OK;
187 }
188 long WINAPI
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
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 }
254 
255 /*****************************************************************************
256  * libAVMemInputPin
257  ****************************************************************************/
258 long WINAPI
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
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
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
288  BOOL rdwr)
289 {
290  dshowdebug("libAVMemInputPin_NotifyAllocator(%p)\n", this);
291  return S_OK;
292 }
293 long WINAPI
295  ALLOCATOR_PROPERTIES *props)
296 {
297  dshowdebug("libAVMemInputPin_GetAllocatorRequirements(%p)\n", this);
298  return E_NOTIMPL;
299 }
300 long WINAPI
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; /* todo should be a long? */
308  int index;
309  int64_t curtime;
310  int64_t orig_curtime;
311  const char *devtypename = (devtype == VideoDevice) ? "video" : "audio";
312  IReferenceClock *clock = pin->filter->clock;
313  int64_t dummy;
314 
315  dshowdebug("libAVMemInputPin_Receive(%p)\n", this);
316 
317  if (!sample)
318  return E_POINTER;
319 
320  IMediaSample_GetTime(sample, &orig_curtime, &dummy);
321  orig_curtime += pin->filter->start_time;
322  if (devtype == VideoDevice) {
323  /* PTS from video devices is unreliable. */
324  IReferenceClock_GetTime(clock, &curtime);
325  } else {
326  IMediaSample_GetTime(sample, &curtime, &dummy);
327  if(curtime > 400000000000000000LL) {
328  /* initial frames sometimes start < 0 (shown as a very large number here,
329  like 437650244077016960 which FFmpeg doesn't like.
330  TODO figure out math. For now just drop them. */
331  av_log(NULL, AV_LOG_DEBUG,
332  "dshow dropping initial (or ending) audio frame with odd PTS too high %"PRId64"\n", curtime);
333  return S_OK;
334  }
335  curtime += pin->filter->start_time;
336  }
337 
338  buf_size = IMediaSample_GetActualDataLength(sample);
339  IMediaSample_GetPointer(sample, &buf);
340  priv_data = pin->filter->priv_data;
341  index = pin->filter->stream_index;
342 
343  av_log(NULL, AV_LOG_VERBOSE, "dshow passing through packet of type %s size %6d timestamp %"PRId64" orig timestamp %"PRId64"\n",
344  devtypename, buf_size, curtime, orig_curtime);
345  pin->filter->callback(priv_data, index, buf, buf_size, curtime, devtype);
346 
347  return S_OK;
348 }
349 long WINAPI
351  IMediaSample **samples, long n, long *nproc)
352 {
353  int i;
354  dshowdebug("libAVMemInputPin_ReceiveMultiple(%p)\n", this);
355 
356  for (i = 0; i < n; i++)
357  libAVMemInputPin_Receive(this, samples[i]);
358 
359  *nproc = n;
360  return S_OK;
361 }
362 long WINAPI
364 {
365  dshowdebug("libAVMemInputPin_ReceiveCanBlock(%p)\n", this);
366  /* I swear I will not block. */
367  return S_FALSE;
368 }
369 
370 void
372 {
373  libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
374  dshowdebug("libAVMemInputPin_Destroy(%p)\n", this);
375  libAVPin_Destroy(pin);
376 }