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