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https://github.com/FFmpeg/FFmpeg.git
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190f6135b4
Handling DirectShow events prevents infinite loops when there is an error in the graph, such as a device being disconnected. This makes it possible for dshow to return an error to the caller and run the cleanup code. Based on patch by Don Moir <donmoir@comcast.net>.
280 lines
14 KiB
C
280 lines
14 KiB
C
/*
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* DirectShow capture interface
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* Copyright (c) 2010 Ramiro Polla
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVDEVICE_DSHOW_H
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#define AVDEVICE_DSHOW_H
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#define DSHOWDEBUG 0
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#include "avdevice.h"
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#define COBJMACROS
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#include <windows.h>
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#define NO_DSHOW_STRSAFE
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#include <dshow.h>
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#include <dvdmedia.h>
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/* EC_DEVICE_LOST is not defined in MinGW dshow headers. */
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#ifndef EC_DEVICE_LOST
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#define EC_DEVICE_LOST 0x1f
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#endif
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long ff_copy_dshow_media_type(AM_MEDIA_TYPE *dst, const AM_MEDIA_TYPE *src);
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void ff_print_VIDEO_STREAM_CONFIG_CAPS(const VIDEO_STREAM_CONFIG_CAPS *caps);
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void ff_print_AUDIO_STREAM_CONFIG_CAPS(const AUDIO_STREAM_CONFIG_CAPS *caps);
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void ff_print_AM_MEDIA_TYPE(const AM_MEDIA_TYPE *type);
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void ff_printGUID(const GUID *g);
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#if DSHOWDEBUG
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extern const AVClass *ff_dshow_context_class_ptr;
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#define dshowdebug(...) av_log(&ff_dshow_context_class_ptr, AV_LOG_DEBUG, __VA_ARGS__)
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#else
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#define dshowdebug(...)
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#endif
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static inline void nothing(void *foo)
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{
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}
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struct GUIDoffset {
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const GUID *iid;
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int offset;
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};
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enum dshowDeviceType {
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VideoDevice = 0,
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AudioDevice = 1,
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};
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#define DECLARE_QUERYINTERFACE(class, ...) \
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long WINAPI \
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class##_QueryInterface(class *this, const GUID *riid, void **ppvObject) \
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{ \
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struct GUIDoffset ifaces[] = __VA_ARGS__; \
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int i; \
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dshowdebug(AV_STRINGIFY(class)"_QueryInterface(%p, %p, %p)\n", this, riid, ppvObject); \
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ff_printGUID(riid); \
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if (!ppvObject) \
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return E_POINTER; \
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for (i = 0; i < sizeof(ifaces)/sizeof(ifaces[0]); i++) { \
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if (IsEqualGUID(riid, ifaces[i].iid)) { \
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void *obj = (void *) ((uint8_t *) this + ifaces[i].offset); \
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class##_AddRef(this); \
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dshowdebug("\tfound %d with offset %d\n", i, ifaces[i].offset); \
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*ppvObject = (void *) obj; \
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return S_OK; \
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} \
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} \
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dshowdebug("\tE_NOINTERFACE\n"); \
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*ppvObject = NULL; \
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return E_NOINTERFACE; \
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}
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#define DECLARE_ADDREF(class) \
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unsigned long WINAPI \
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class##_AddRef(class *this) \
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{ \
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dshowdebug(AV_STRINGIFY(class)"_AddRef(%p)\t%ld\n", this, this->ref+1); \
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return InterlockedIncrement(&this->ref); \
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}
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#define DECLARE_RELEASE(class) \
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unsigned long WINAPI \
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class##_Release(class *this) \
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{ \
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long ref = InterlockedDecrement(&this->ref); \
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dshowdebug(AV_STRINGIFY(class)"_Release(%p)\t%ld\n", this, ref); \
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if (!ref) \
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class##_Destroy(this); \
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return ref; \
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}
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#define DECLARE_DESTROY(class, func) \
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void class##_Destroy(class *this) \
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{ \
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dshowdebug(AV_STRINGIFY(class)"_Destroy(%p)\n", this); \
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func(this); \
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if (this) { \
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if (this->vtbl) \
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CoTaskMemFree(this->vtbl); \
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CoTaskMemFree(this); \
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} \
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}
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#define DECLARE_CREATE(class, setup, ...) \
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class *class##_Create(__VA_ARGS__) \
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{ \
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class *this = CoTaskMemAlloc(sizeof(class)); \
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void *vtbl = CoTaskMemAlloc(sizeof(*this->vtbl)); \
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dshowdebug(AV_STRINGIFY(class)"_Create(%p)\n", this); \
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if (!this || !vtbl) \
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goto fail; \
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ZeroMemory(this, sizeof(class)); \
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ZeroMemory(vtbl, sizeof(*this->vtbl)); \
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this->ref = 1; \
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this->vtbl = vtbl; \
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if (!setup) \
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goto fail; \
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dshowdebug("created "AV_STRINGIFY(class)" %p\n", this); \
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return this; \
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fail: \
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class##_Destroy(this); \
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dshowdebug("could not create "AV_STRINGIFY(class)"\n"); \
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return NULL; \
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}
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#define SETVTBL(vtbl, class, fn) \
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do { (vtbl)->fn = (void *) class##_##fn; } while(0)
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/*****************************************************************************
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* Forward Declarations
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****************************************************************************/
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typedef struct libAVPin libAVPin;
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typedef struct libAVMemInputPin libAVMemInputPin;
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typedef struct libAVEnumPins libAVEnumPins;
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typedef struct libAVEnumMediaTypes libAVEnumMediaTypes;
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typedef struct libAVFilter libAVFilter;
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/*****************************************************************************
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* libAVPin
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****************************************************************************/
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struct libAVPin {
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IPinVtbl *vtbl;
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long ref;
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libAVFilter *filter;
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IPin *connectedto;
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AM_MEDIA_TYPE type;
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IMemInputPinVtbl *imemvtbl;
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};
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long WINAPI libAVPin_QueryInterface (libAVPin *, const GUID *, void **);
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unsigned long WINAPI libAVPin_AddRef (libAVPin *);
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unsigned long WINAPI libAVPin_Release (libAVPin *);
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long WINAPI libAVPin_Connect (libAVPin *, IPin *, const AM_MEDIA_TYPE *);
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long WINAPI libAVPin_ReceiveConnection (libAVPin *, IPin *, const AM_MEDIA_TYPE *);
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long WINAPI libAVPin_Disconnect (libAVPin *);
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long WINAPI libAVPin_ConnectedTo (libAVPin *, IPin **);
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long WINAPI libAVPin_ConnectionMediaType (libAVPin *, AM_MEDIA_TYPE *);
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long WINAPI libAVPin_QueryPinInfo (libAVPin *, PIN_INFO *);
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long WINAPI libAVPin_QueryDirection (libAVPin *, PIN_DIRECTION *);
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long WINAPI libAVPin_QueryId (libAVPin *, wchar_t **);
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long WINAPI libAVPin_QueryAccept (libAVPin *, const AM_MEDIA_TYPE *);
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long WINAPI libAVPin_EnumMediaTypes (libAVPin *, IEnumMediaTypes **);
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long WINAPI libAVPin_QueryInternalConnections(libAVPin *, IPin **, unsigned long *);
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long WINAPI libAVPin_EndOfStream (libAVPin *);
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long WINAPI libAVPin_BeginFlush (libAVPin *);
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long WINAPI libAVPin_EndFlush (libAVPin *);
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long WINAPI libAVPin_NewSegment (libAVPin *, REFERENCE_TIME, REFERENCE_TIME, double);
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long WINAPI libAVMemInputPin_QueryInterface (libAVMemInputPin *, const GUID *, void **);
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unsigned long WINAPI libAVMemInputPin_AddRef (libAVMemInputPin *);
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unsigned long WINAPI libAVMemInputPin_Release (libAVMemInputPin *);
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long WINAPI libAVMemInputPin_GetAllocator (libAVMemInputPin *, IMemAllocator **);
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long WINAPI libAVMemInputPin_NotifyAllocator (libAVMemInputPin *, IMemAllocator *, BOOL);
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long WINAPI libAVMemInputPin_GetAllocatorRequirements(libAVMemInputPin *, ALLOCATOR_PROPERTIES *);
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long WINAPI libAVMemInputPin_Receive (libAVMemInputPin *, IMediaSample *);
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long WINAPI libAVMemInputPin_ReceiveMultiple (libAVMemInputPin *, IMediaSample **, long, long *);
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long WINAPI libAVMemInputPin_ReceiveCanBlock (libAVMemInputPin *);
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void libAVPin_Destroy(libAVPin *);
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libAVPin *libAVPin_Create (libAVFilter *filter);
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void libAVMemInputPin_Destroy(libAVMemInputPin *);
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/*****************************************************************************
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* libAVEnumPins
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****************************************************************************/
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struct libAVEnumPins {
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IEnumPinsVtbl *vtbl;
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long ref;
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int pos;
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libAVPin *pin;
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libAVFilter *filter;
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};
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long WINAPI libAVEnumPins_QueryInterface(libAVEnumPins *, const GUID *, void **);
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unsigned long WINAPI libAVEnumPins_AddRef (libAVEnumPins *);
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unsigned long WINAPI libAVEnumPins_Release (libAVEnumPins *);
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long WINAPI libAVEnumPins_Next (libAVEnumPins *, unsigned long, IPin **, unsigned long *);
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long WINAPI libAVEnumPins_Skip (libAVEnumPins *, unsigned long);
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long WINAPI libAVEnumPins_Reset (libAVEnumPins *);
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long WINAPI libAVEnumPins_Clone (libAVEnumPins *, libAVEnumPins **);
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void libAVEnumPins_Destroy(libAVEnumPins *);
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libAVEnumPins *libAVEnumPins_Create (libAVPin *pin, libAVFilter *filter);
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/*****************************************************************************
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* libAVEnumMediaTypes
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****************************************************************************/
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struct libAVEnumMediaTypes {
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IEnumPinsVtbl *vtbl;
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long ref;
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int pos;
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AM_MEDIA_TYPE type;
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};
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long WINAPI libAVEnumMediaTypes_QueryInterface(libAVEnumMediaTypes *, const GUID *, void **);
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unsigned long WINAPI libAVEnumMediaTypes_AddRef (libAVEnumMediaTypes *);
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unsigned long WINAPI libAVEnumMediaTypes_Release (libAVEnumMediaTypes *);
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long WINAPI libAVEnumMediaTypes_Next (libAVEnumMediaTypes *, unsigned long, AM_MEDIA_TYPE **, unsigned long *);
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long WINAPI libAVEnumMediaTypes_Skip (libAVEnumMediaTypes *, unsigned long);
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long WINAPI libAVEnumMediaTypes_Reset (libAVEnumMediaTypes *);
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long WINAPI libAVEnumMediaTypes_Clone (libAVEnumMediaTypes *, libAVEnumMediaTypes **);
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void libAVEnumMediaTypes_Destroy(libAVEnumMediaTypes *);
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libAVEnumMediaTypes *libAVEnumMediaTypes_Create(const AM_MEDIA_TYPE *type);
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/*****************************************************************************
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* libAVFilter
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****************************************************************************/
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struct libAVFilter {
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IBaseFilterVtbl *vtbl;
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long ref;
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const wchar_t *name;
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libAVPin *pin;
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FILTER_INFO info;
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FILTER_STATE state;
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IReferenceClock *clock;
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enum dshowDeviceType type;
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void *priv_data;
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int stream_index;
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int64_t start_time;
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void (*callback)(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time);
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};
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long WINAPI libAVFilter_QueryInterface (libAVFilter *, const GUID *, void **);
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unsigned long WINAPI libAVFilter_AddRef (libAVFilter *);
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unsigned long WINAPI libAVFilter_Release (libAVFilter *);
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long WINAPI libAVFilter_GetClassID (libAVFilter *, CLSID *);
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long WINAPI libAVFilter_Stop (libAVFilter *);
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long WINAPI libAVFilter_Pause (libAVFilter *);
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long WINAPI libAVFilter_Run (libAVFilter *, REFERENCE_TIME);
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long WINAPI libAVFilter_GetState (libAVFilter *, DWORD, FILTER_STATE *);
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long WINAPI libAVFilter_SetSyncSource (libAVFilter *, IReferenceClock *);
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long WINAPI libAVFilter_GetSyncSource (libAVFilter *, IReferenceClock **);
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long WINAPI libAVFilter_EnumPins (libAVFilter *, IEnumPins **);
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long WINAPI libAVFilter_FindPin (libAVFilter *, const wchar_t *, IPin **);
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long WINAPI libAVFilter_QueryFilterInfo(libAVFilter *, FILTER_INFO *);
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long WINAPI libAVFilter_JoinFilterGraph(libAVFilter *, IFilterGraph *, const wchar_t *);
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long WINAPI libAVFilter_QueryVendorInfo(libAVFilter *, wchar_t **);
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void libAVFilter_Destroy(libAVFilter *);
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libAVFilter *libAVFilter_Create (void *, void *, enum dshowDeviceType);
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#endif /* AVDEVICE_DSHOW_H */
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