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FFmpeg/libavdevice/dshow_pin.c
Ramiro Polla 0b951d103d dshow: release pin on disconnect 
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
2011-09-16 11:16:05 +02:00

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/*
* DirectShow capture interface
* Copyright (c) 2010 Ramiro Polla
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "dshow.h"
#include <stddef.h>
#define imemoffset offsetof(libAVPin, imemvtbl)
DECLARE_QUERYINTERFACE(libAVPin,
{ {&IID_IUnknown,0}, {&IID_IPin,0}, {&IID_IMemInputPin,imemoffset} })
DECLARE_ADDREF(libAVPin)
DECLARE_RELEASE(libAVPin)
long WINAPI
libAVPin_Connect(libAVPin *this, IPin *pin, const AM_MEDIA_TYPE *type)
{
dshowdebug("libAVPin_Connect(%p, %p, %p)\n", this, pin, type);
/* Input pins receive connections. */
return S_FALSE;
}
long WINAPI
libAVPin_ReceiveConnection(libAVPin *this, IPin *pin,
const AM_MEDIA_TYPE *type)
{
enum dshowDeviceType devtype = this->filter->type;
dshowdebug("libAVPin_ReceiveConnection(%p)\n", this);
if (!pin)
return E_POINTER;
if (this->connectedto)
return VFW_E_ALREADY_CONNECTED;
ff_print_AM_MEDIA_TYPE(type);
if (devtype == VideoDevice) {
if (!IsEqualGUID(&type->majortype, &MEDIATYPE_Video))
return VFW_E_TYPE_NOT_ACCEPTED;
} else {
if (!IsEqualGUID(&type->majortype, &MEDIATYPE_Audio))
return VFW_E_TYPE_NOT_ACCEPTED;
}
IPin_AddRef(pin);
this->connectedto = pin;
ff_copy_dshow_media_type(&this->type, type);
return S_OK;
}
long WINAPI
libAVPin_Disconnect(libAVPin *this)
{
dshowdebug("libAVPin_Disconnect(%p)\n", this);
if (this->filter->state != State_Stopped)
return VFW_E_NOT_STOPPED;
if (!this->connectedto)
return S_FALSE;
IPin_Release(this->connectedto);
this->connectedto = NULL;
return S_OK;
}
long WINAPI
libAVPin_ConnectedTo(libAVPin *this, IPin **pin)
{
dshowdebug("libAVPin_ConnectedTo(%p)\n", this);
if (!pin)
return E_POINTER;
if (!this->connectedto)
return VFW_E_NOT_CONNECTED;
IPin_AddRef(this->connectedto);
*pin = this->connectedto;
return S_OK;
}
long WINAPI
libAVPin_ConnectionMediaType(libAVPin *this, AM_MEDIA_TYPE *type)
{
dshowdebug("libAVPin_ConnectionMediaType(%p)\n", this);
if (!type)
return E_POINTER;
if (!this->connectedto)
return VFW_E_NOT_CONNECTED;
return ff_copy_dshow_media_type(type, &this->type);
}
long WINAPI
libAVPin_QueryPinInfo(libAVPin *this, PIN_INFO *info)
{
dshowdebug("libAVPin_QueryPinInfo(%p)\n", this);
if (!info)
return E_POINTER;
if (this->filter)
libAVFilter_AddRef(this->filter);
info->pFilter = (IBaseFilter *) this->filter;
info->dir = PINDIR_INPUT;
wcscpy(info->achName, L"Capture");
return S_OK;
}
long WINAPI
libAVPin_QueryDirection(libAVPin *this, PIN_DIRECTION *dir)
{
dshowdebug("libAVPin_QueryDirection(%p)\n", this);
if (!dir)
return E_POINTER;
*dir = PINDIR_INPUT;
return S_OK;
}
long WINAPI
libAVPin_QueryId(libAVPin *this, wchar_t **id)
{
dshowdebug("libAVPin_QueryId(%p)\n", this);
if (!id)
return E_POINTER;
*id = wcsdup(L"libAV Pin");
return S_OK;
}
long WINAPI
libAVPin_QueryAccept(libAVPin *this, const AM_MEDIA_TYPE *type)
{
dshowdebug("libAVPin_QueryAccept(%p)\n", this);
return S_FALSE;
}
long WINAPI
libAVPin_EnumMediaTypes(libAVPin *this, IEnumMediaTypes **enumtypes)
{
const AM_MEDIA_TYPE *type = NULL;
libAVEnumMediaTypes *new;
dshowdebug("libAVPin_EnumMediaTypes(%p)\n", this);
if (!enumtypes)
return E_POINTER;
new = libAVEnumMediaTypes_Create(type);
if (!new)
return E_OUTOFMEMORY;
*enumtypes = (IEnumMediaTypes *) new;
return S_OK;
}
long WINAPI
libAVPin_QueryInternalConnections(libAVPin *this, IPin **pin,
unsigned long *npin)
{
dshowdebug("libAVPin_QueryInternalConnections(%p)\n", this);
return E_NOTIMPL;
}
long WINAPI
libAVPin_EndOfStream(libAVPin *this)
{
dshowdebug("libAVPin_EndOfStream(%p)\n", this);
/* I don't care. */
return S_OK;
}
long WINAPI
libAVPin_BeginFlush(libAVPin *this)
{
dshowdebug("libAVPin_BeginFlush(%p)\n", this);
/* I don't care. */
return S_OK;
}
long WINAPI
libAVPin_EndFlush(libAVPin *this)
{
dshowdebug("libAVPin_EndFlush(%p)\n", this);
/* I don't care. */
return S_OK;
}
long WINAPI
libAVPin_NewSegment(libAVPin *this, REFERENCE_TIME start, REFERENCE_TIME stop,
double rate)
{
dshowdebug("libAVPin_NewSegment(%p)\n", this);
/* I don't care. */
return S_OK;
}
static int
libAVPin_Setup(libAVPin *this, libAVFilter *filter)
{
IPinVtbl *vtbl = this->vtbl;
IMemInputPinVtbl *imemvtbl;
if (!filter)
return 0;
imemvtbl = av_malloc(sizeof(IMemInputPinVtbl));
if (!imemvtbl)
return 0;
SETVTBL(imemvtbl, libAVMemInputPin, QueryInterface);
SETVTBL(imemvtbl, libAVMemInputPin, AddRef);
SETVTBL(imemvtbl, libAVMemInputPin, Release);
SETVTBL(imemvtbl, libAVMemInputPin, GetAllocator);
SETVTBL(imemvtbl, libAVMemInputPin, NotifyAllocator);
SETVTBL(imemvtbl, libAVMemInputPin, GetAllocatorRequirements);
SETVTBL(imemvtbl, libAVMemInputPin, Receive);
SETVTBL(imemvtbl, libAVMemInputPin, ReceiveMultiple);
SETVTBL(imemvtbl, libAVMemInputPin, ReceiveCanBlock);
this->imemvtbl = imemvtbl;
SETVTBL(vtbl, libAVPin, QueryInterface);
SETVTBL(vtbl, libAVPin, AddRef);
SETVTBL(vtbl, libAVPin, Release);
SETVTBL(vtbl, libAVPin, Connect);
SETVTBL(vtbl, libAVPin, ReceiveConnection);
SETVTBL(vtbl, libAVPin, Disconnect);
SETVTBL(vtbl, libAVPin, ConnectedTo);
SETVTBL(vtbl, libAVPin, ConnectionMediaType);
SETVTBL(vtbl, libAVPin, QueryPinInfo);
SETVTBL(vtbl, libAVPin, QueryDirection);
SETVTBL(vtbl, libAVPin, QueryId);
SETVTBL(vtbl, libAVPin, QueryAccept);
SETVTBL(vtbl, libAVPin, EnumMediaTypes);
SETVTBL(vtbl, libAVPin, QueryInternalConnections);
SETVTBL(vtbl, libAVPin, EndOfStream);
SETVTBL(vtbl, libAVPin, BeginFlush);
SETVTBL(vtbl, libAVPin, EndFlush);
SETVTBL(vtbl, libAVPin, NewSegment);
this->filter = filter;
return 1;
}
DECLARE_CREATE(libAVPin, libAVPin_Setup(this, filter), libAVFilter *filter)
DECLARE_DESTROY(libAVPin, nothing)
/*****************************************************************************
* libAVMemInputPin
****************************************************************************/
long WINAPI
libAVMemInputPin_QueryInterface(libAVMemInputPin *this, const GUID *riid,
void **ppvObject)
{
libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
dshowdebug("libAVMemInputPin_QueryInterface(%p)\n", this);
return libAVPin_QueryInterface(pin, riid, ppvObject);
}
unsigned long WINAPI
libAVMemInputPin_AddRef(libAVMemInputPin *this)
{
libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
dshowdebug("libAVMemInputPin_AddRef(%p)\n", this);
return libAVPin_AddRef(pin);
}
unsigned long WINAPI
libAVMemInputPin_Release(libAVMemInputPin *this)
{
libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
dshowdebug("libAVMemInputPin_Release(%p)\n", this);
return libAVPin_Release(pin);
}
long WINAPI
libAVMemInputPin_GetAllocator(libAVMemInputPin *this, IMemAllocator **alloc)
{
dshowdebug("libAVMemInputPin_GetAllocator(%p)\n", this);
return VFW_E_NO_ALLOCATOR;
}
long WINAPI
libAVMemInputPin_NotifyAllocator(libAVMemInputPin *this, IMemAllocator *alloc,
WINBOOL rdwr)
{
dshowdebug("libAVMemInputPin_NotifyAllocator(%p)\n", this);
return S_OK;
}
long WINAPI
libAVMemInputPin_GetAllocatorRequirements(libAVMemInputPin *this,
ALLOCATOR_PROPERTIES *props)
{
dshowdebug("libAVMemInputPin_GetAllocatorRequirements(%p)\n", this);
return E_NOTIMPL;
}
long WINAPI
libAVMemInputPin_Receive(libAVMemInputPin *this, IMediaSample *sample)
{
libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
enum dshowDeviceType devtype = pin->filter->type;
void *priv_data;
uint8_t *buf;
int buf_size;
int index;
int64_t curtime;
dshowdebug("libAVMemInputPin_Receive(%p)\n", this);
if (!sample)
return E_POINTER;
if (devtype == VideoDevice) {
/* PTS from video devices is unreliable. */
IReferenceClock *clock = pin->filter->clock;
IReferenceClock_GetTime(clock, &curtime);
} else {
int64_t dummy;
IMediaSample_GetTime(sample, &curtime, &dummy);
curtime += pin->filter->start_time;
}
buf_size = IMediaSample_GetActualDataLength(sample);
IMediaSample_GetPointer(sample, &buf);
priv_data = pin->filter->priv_data;
index = pin->filter->stream_index;
pin->filter->callback(priv_data, index, buf, buf_size, curtime);
return S_OK;
}
long WINAPI
libAVMemInputPin_ReceiveMultiple(libAVMemInputPin *this,
IMediaSample **samples, long n, long *nproc)
{
int i;
dshowdebug("libAVMemInputPin_ReceiveMultiple(%p)\n", this);
for (i = 0; i < n; i++)
libAVMemInputPin_Receive(this, samples[i]);
*nproc = n;
return S_OK;
}
long WINAPI
libAVMemInputPin_ReceiveCanBlock(libAVMemInputPin *this)
{
dshowdebug("libAVMemInputPin_ReceiveCanBlock(%p)\n", this);
/* I swear I will not block. */
return S_FALSE;
}
void
libAVMemInputPin_Destroy(libAVMemInputPin *this)
{
libAVPin *pin = (libAVPin *) ((uint8_t *) this - imemoffset);
dshowdebug("libAVMemInputPin_Destroy(%p)\n", this);
return libAVPin_Destroy(pin);
}
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