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dshow_capture.h
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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 #ifndef AVDEVICE_DSHOW_H
23 #define AVDEVICE_DSHOW_H
24 
25 #define DSHOWDEBUG 0
26 
27 #include "avdevice.h"
28 
29 #define COBJMACROS
30 #define WIN32_LEAN_AND_MEAN
31 #include <windows.h>
32 #define NO_DSHOW_STRSAFE
33 #include <dshow.h>
34 #include <dvdmedia.h>
35 
36 /* EC_DEVICE_LOST is not defined in MinGW dshow headers. */
37 #ifndef EC_DEVICE_LOST
38 #define EC_DEVICE_LOST 0x1f
39 #endif
40 
41 long ff_copy_dshow_media_type(AM_MEDIA_TYPE *dst, const AM_MEDIA_TYPE *src);
42 void ff_print_VIDEO_STREAM_CONFIG_CAPS(const VIDEO_STREAM_CONFIG_CAPS *caps);
43 void ff_print_AUDIO_STREAM_CONFIG_CAPS(const AUDIO_STREAM_CONFIG_CAPS *caps);
44 void ff_print_AM_MEDIA_TYPE(const AM_MEDIA_TYPE *type);
45 void ff_printGUID(const GUID *g);
46 
47 #if DSHOWDEBUG
48 extern const AVClass *ff_dshow_context_class_ptr;
49 #define dshowdebug(...) av_log(&ff_dshow_context_class_ptr, AV_LOG_DEBUG, __VA_ARGS__)
50 #else
51 #define dshowdebug(...)
52 #endif
53 
54 static inline void nothing(void *foo)
55 {
56 }
57 
58 struct GUIDoffset {
59  const GUID *iid;
60  int offset;
61 };
62 
63 enum dshowDeviceType {
64  VideoDevice = 0,
65  AudioDevice = 1,
66 };
67 
68 #define DECLARE_QUERYINTERFACE(class, ...) \
69 long WINAPI \
70 class##_QueryInterface(class *this, const GUID *riid, void **ppvObject) \
71 { \
72  struct GUIDoffset ifaces[] = __VA_ARGS__; \
73  int i; \
74  dshowdebug(AV_STRINGIFY(class)"_QueryInterface(%p, %p, %p)\n", this, riid, ppvObject); \
75  ff_printGUID(riid); \
76  if (!ppvObject) \
77  return E_POINTER; \
78  for (i = 0; i < sizeof(ifaces)/sizeof(ifaces[0]); i++) { \
79  if (IsEqualGUID(riid, ifaces[i].iid)) { \
80  void *obj = (void *) ((uint8_t *) this + ifaces[i].offset); \
81  class##_AddRef(this); \
82  dshowdebug("\tfound %d with offset %d\n", i, ifaces[i].offset); \
83  *ppvObject = (void *) obj; \
84  return S_OK; \
85  } \
86  } \
87  dshowdebug("\tE_NOINTERFACE\n"); \
88  *ppvObject = NULL; \
89  return E_NOINTERFACE; \
90 }
91 #define DECLARE_ADDREF(class) \
92 unsigned long WINAPI \
93 class##_AddRef(class *this) \
94 { \
95  dshowdebug(AV_STRINGIFY(class)"_AddRef(%p)\t%ld\n", this, this->ref+1); \
96  return InterlockedIncrement(&this->ref); \
97 }
98 #define DECLARE_RELEASE(class) \
99 unsigned long WINAPI \
100 class##_Release(class *this) \
101 { \
102  long ref = InterlockedDecrement(&this->ref); \
103  dshowdebug(AV_STRINGIFY(class)"_Release(%p)\t%ld\n", this, ref); \
104  if (!ref) \
105  class##_Destroy(this); \
106  return ref; \
107 }
108 
109 #define DECLARE_DESTROY(class, func) \
110 void class##_Destroy(class *this) \
111 { \
112  dshowdebug(AV_STRINGIFY(class)"_Destroy(%p)\n", this); \
113  func(this); \
114  if (this) { \
115  if (this->vtbl) \
116  CoTaskMemFree(this->vtbl); \
117  CoTaskMemFree(this); \
118  } \
119 }
120 #define DECLARE_CREATE(class, setup, ...) \
121 class *class##_Create(__VA_ARGS__) \
122 { \
123  class *this = CoTaskMemAlloc(sizeof(class)); \
124  void *vtbl = CoTaskMemAlloc(sizeof(*this->vtbl)); \
125  dshowdebug(AV_STRINGIFY(class)"_Create(%p)\n", this); \
126  if (!this || !vtbl) \
127  goto fail; \
128  ZeroMemory(this, sizeof(class)); \
129  ZeroMemory(vtbl, sizeof(*this->vtbl)); \
130  this->ref = 1; \
131  this->vtbl = vtbl; \
132  if (!setup) \
133  goto fail; \
134  dshowdebug("created "AV_STRINGIFY(class)" %p\n", this); \
135  return this; \
136 fail: \
137  class##_Destroy(this); \
138  dshowdebug("could not create "AV_STRINGIFY(class)"\n"); \
139  return NULL; \
140 }
141 
142 #define SETVTBL(vtbl, class, fn) \
143  do { (vtbl)->fn = (void *) class##_##fn; } while(0)
144 
145 /*****************************************************************************
146  * Forward Declarations
147  ****************************************************************************/
148 typedef struct libAVPin libAVPin;
149 typedef struct libAVMemInputPin libAVMemInputPin;
150 typedef struct libAVEnumPins libAVEnumPins;
151 typedef struct libAVEnumMediaTypes libAVEnumMediaTypes;
152 typedef struct libAVFilter libAVFilter;
153 
154 /*****************************************************************************
155  * libAVPin
156  ****************************************************************************/
157 struct libAVPin {
158  IPinVtbl *vtbl;
159  long ref;
160  libAVFilter *filter;
161  IPin *connectedto;
162  AM_MEDIA_TYPE type;
163  IMemInputPinVtbl *imemvtbl;
164 };
165 
166 long WINAPI libAVPin_QueryInterface (libAVPin *, const GUID *, void **);
167 unsigned long WINAPI libAVPin_AddRef (libAVPin *);
168 unsigned long WINAPI libAVPin_Release (libAVPin *);
169 long WINAPI libAVPin_Connect (libAVPin *, IPin *, const AM_MEDIA_TYPE *);
170 long WINAPI libAVPin_ReceiveConnection (libAVPin *, IPin *, const AM_MEDIA_TYPE *);
171 long WINAPI libAVPin_Disconnect (libAVPin *);
172 long WINAPI libAVPin_ConnectedTo (libAVPin *, IPin **);
173 long WINAPI libAVPin_ConnectionMediaType (libAVPin *, AM_MEDIA_TYPE *);
174 long WINAPI libAVPin_QueryPinInfo (libAVPin *, PIN_INFO *);
175 long WINAPI libAVPin_QueryDirection (libAVPin *, PIN_DIRECTION *);
176 long WINAPI libAVPin_QueryId (libAVPin *, wchar_t **);
177 long WINAPI libAVPin_QueryAccept (libAVPin *, const AM_MEDIA_TYPE *);
178 long WINAPI libAVPin_EnumMediaTypes (libAVPin *, IEnumMediaTypes **);
179 long WINAPI libAVPin_QueryInternalConnections(libAVPin *, IPin **, unsigned long *);
180 long WINAPI libAVPin_EndOfStream (libAVPin *);
181 long WINAPI libAVPin_BeginFlush (libAVPin *);
182 long WINAPI libAVPin_EndFlush (libAVPin *);
183 long WINAPI libAVPin_NewSegment (libAVPin *, REFERENCE_TIME, REFERENCE_TIME, double);
184 
185 long WINAPI libAVMemInputPin_QueryInterface (libAVMemInputPin *, const GUID *, void **);
186 unsigned long WINAPI libAVMemInputPin_AddRef (libAVMemInputPin *);
187 unsigned long WINAPI libAVMemInputPin_Release (libAVMemInputPin *);
188 long WINAPI libAVMemInputPin_GetAllocator (libAVMemInputPin *, IMemAllocator **);
189 long WINAPI libAVMemInputPin_NotifyAllocator (libAVMemInputPin *, IMemAllocator *, BOOL);
190 long WINAPI libAVMemInputPin_GetAllocatorRequirements(libAVMemInputPin *, ALLOCATOR_PROPERTIES *);
191 long WINAPI libAVMemInputPin_Receive (libAVMemInputPin *, IMediaSample *);
192 long WINAPI libAVMemInputPin_ReceiveMultiple (libAVMemInputPin *, IMediaSample **, long, long *);
193 long WINAPI libAVMemInputPin_ReceiveCanBlock (libAVMemInputPin *);
194 
195 void libAVPin_Destroy(libAVPin *);
196 libAVPin *libAVPin_Create (libAVFilter *filter);
197 
198 void libAVMemInputPin_Destroy(libAVMemInputPin *);
199 
200 /*****************************************************************************
201  * libAVEnumPins
202  ****************************************************************************/
203 struct libAVEnumPins {
204  IEnumPinsVtbl *vtbl;
205  long ref;
206  int pos;
207  libAVPin *pin;
208  libAVFilter *filter;
209 };
210 
211 long WINAPI libAVEnumPins_QueryInterface(libAVEnumPins *, const GUID *, void **);
212 unsigned long WINAPI libAVEnumPins_AddRef (libAVEnumPins *);
213 unsigned long WINAPI libAVEnumPins_Release (libAVEnumPins *);
214 long WINAPI libAVEnumPins_Next (libAVEnumPins *, unsigned long, IPin **, unsigned long *);
215 long WINAPI libAVEnumPins_Skip (libAVEnumPins *, unsigned long);
216 long WINAPI libAVEnumPins_Reset (libAVEnumPins *);
217 long WINAPI libAVEnumPins_Clone (libAVEnumPins *, libAVEnumPins **);
218 
219 void libAVEnumPins_Destroy(libAVEnumPins *);
220 libAVEnumPins *libAVEnumPins_Create (libAVPin *pin, libAVFilter *filter);
221 
222 /*****************************************************************************
223  * libAVEnumMediaTypes
224  ****************************************************************************/
225 struct libAVEnumMediaTypes {
226  IEnumPinsVtbl *vtbl;
227  long ref;
228  int pos;
229  AM_MEDIA_TYPE type;
230 };
231 
232 long WINAPI libAVEnumMediaTypes_QueryInterface(libAVEnumMediaTypes *, const GUID *, void **);
233 unsigned long WINAPI libAVEnumMediaTypes_AddRef (libAVEnumMediaTypes *);
234 unsigned long WINAPI libAVEnumMediaTypes_Release (libAVEnumMediaTypes *);
235 long WINAPI libAVEnumMediaTypes_Next (libAVEnumMediaTypes *, unsigned long, AM_MEDIA_TYPE **, unsigned long *);
236 long WINAPI libAVEnumMediaTypes_Skip (libAVEnumMediaTypes *, unsigned long);
237 long WINAPI libAVEnumMediaTypes_Reset (libAVEnumMediaTypes *);
238 long WINAPI libAVEnumMediaTypes_Clone (libAVEnumMediaTypes *, libAVEnumMediaTypes **);
239 
240 void libAVEnumMediaTypes_Destroy(libAVEnumMediaTypes *);
241 libAVEnumMediaTypes *libAVEnumMediaTypes_Create(const AM_MEDIA_TYPE *type);
242 
243 /*****************************************************************************
244  * libAVFilter
245  ****************************************************************************/
246 struct libAVFilter {
247  IBaseFilterVtbl *vtbl;
248  long ref;
249  const wchar_t *name;
250  libAVPin *pin;
251  FILTER_INFO info;
252  FILTER_STATE state;
253  IReferenceClock *clock;
254  enum dshowDeviceType type;
255  void *priv_data;
256  int stream_index;
257  int64_t start_time;
258  void (*callback)(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time, enum dshowDeviceType type);
259 };
260 
261 long WINAPI libAVFilter_QueryInterface (libAVFilter *, const GUID *, void **);
262 unsigned long WINAPI libAVFilter_AddRef (libAVFilter *);
263 unsigned long WINAPI libAVFilter_Release (libAVFilter *);
264 long WINAPI libAVFilter_GetClassID (libAVFilter *, CLSID *);
265 long WINAPI libAVFilter_Stop (libAVFilter *);
266 long WINAPI libAVFilter_Pause (libAVFilter *);
267 long WINAPI libAVFilter_Run (libAVFilter *, REFERENCE_TIME);
268 long WINAPI libAVFilter_GetState (libAVFilter *, DWORD, FILTER_STATE *);
269 long WINAPI libAVFilter_SetSyncSource (libAVFilter *, IReferenceClock *);
270 long WINAPI libAVFilter_GetSyncSource (libAVFilter *, IReferenceClock **);
271 long WINAPI libAVFilter_EnumPins (libAVFilter *, IEnumPins **);
272 long WINAPI libAVFilter_FindPin (libAVFilter *, const wchar_t *, IPin **);
273 long WINAPI libAVFilter_QueryFilterInfo(libAVFilter *, FILTER_INFO *);
274 long WINAPI libAVFilter_JoinFilterGraph(libAVFilter *, IFilterGraph *, const wchar_t *);
275 long WINAPI libAVFilter_QueryVendorInfo(libAVFilter *, wchar_t **);
276 
277 void libAVFilter_Destroy(libAVFilter *);
278 libAVFilter *libAVFilter_Create (void *, void *, enum dshowDeviceType);
279 
280 #endif /* AVDEVICE_DSHOW_H */
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