Sweden-Number/dlls/quartz/pin.h

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/*
* IPin function declarations to allow inheritance
*
* Copyright 2003 Robert Shearman
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* This function will process incoming samples to the pin.
* Any return value valid in IMemInputPin::Receive is allowed here
*
* Cookie is the cookie that was set when requesting the buffer, if you don't
* implement custom requesting, you can safely ignore this
*/
typedef HRESULT (* SAMPLEPROC_PULL)(LPVOID userdata, IMediaSample * pSample, DWORD_PTR cookie);
/* This function will determine whether a type is supported or not.
* It is allowed to return any error value (within reason), as opposed
* to IPin::QueryAccept which is only allowed to return S_OK or S_FALSE.
*/
typedef HRESULT (* QUERYACCEPTPROC)(LPVOID userdata, const AM_MEDIA_TYPE * pmt);
/* This function is called prior to finalizing a connection with
* another pin and can be used to get things from the other pin
* like IMemInput interfaces.
*
* props contains some defaults, but you can safely override them to your liking
*/
typedef HRESULT (* PRECONNECTPROC)(IPin * iface, IPin * pConnectPin, ALLOCATOR_PROPERTIES *props);
/* This function is called whenever a cleanup operation has to occur,
* this is usually after a flush, seek, or end of stream notification.
* This code may even be repeated multiple times, so build your code to
* tolerate this behavior. Return value is ignored and should be S_OK.
*/
typedef HRESULT (* CLEANUPPROC) (LPVOID userdata);
/* This function is called whenever a request for a new sample is made,
* If you implement it (it can be NULL for default behavior), you have to
* call IMemAllocator_GetBuffer and IMemAllocator_RequestBuffer
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* This is useful if you want to request more than 1 buffer at simultaneously
*
* This will also cause the Sample Proc to be called with empty buffers to indicate
* failure in retrieving the sample.
*/
typedef HRESULT (* REQUESTPROC) (LPVOID userdata);
/* This function is called after processing is done (for whatever reason that is caused)
* This is useful if you create processing threads that need to die
*/
typedef HRESULT (* STOPPROCESSPROC) (LPVOID userdata);
#define ALIGNDOWN(value,boundary) ((value)/(boundary)*(boundary))
#define ALIGNUP(value,boundary) (ALIGNDOWN((value)+(boundary)-1, (boundary)))
typedef struct PullPin
{
/* inheritance C style! */
BasePin pin;
LPVOID pUserData;
REFERENCE_TIME rtStart, rtCurrent, rtNext, rtStop;
IAsyncReader * pReader;
IMemAllocator * prefAlloc;
IMemAllocator * pAlloc;
QUERYACCEPTPROC fnQueryAccept;
SAMPLEPROC_PULL fnSampleProc;
PRECONNECTPROC fnPreConnect;
REQUESTPROC fnCustomRequest;
CLEANUPPROC fnCleanProc;
STOPPROCESSPROC fnDone;
double dRate;
BOOL stop_playback;
DWORD cbAlign;
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/* Any code that touches the thread must hold the thread lock,
* lock order: thread_lock and then the filter critical section
* also signal thread_sleepy so the thread knows to wake up
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*/
CRITICAL_SECTION thread_lock;
HANDLE hThread;
DWORD requested_state;
HANDLE hEventStateChanged, thread_sleepy;
DWORD state;
} PullPin;
#define Req_Sleepy 0
#define Req_Die 1
#define Req_Run 2
#define Req_Pause 3
/*** Constructors ***/
HRESULT PullPin_Construct(const IPinVtbl *PullPin_Vtbl, const PIN_INFO * pPinInfo,
SAMPLEPROC_PULL pSampleProc, LPVOID pUserData, QUERYACCEPTPROC pQueryAccept,
CLEANUPPROC pCleanUp, REQUESTPROC pCustomRequest, STOPPROCESSPROC pDone,
LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
void PullPin_destroy(PullPin *pin) DECLSPEC_HIDDEN;
/**************************/
/*** Pin Implementation ***/
/* Pull Pin */
HRESULT WINAPI PullPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt);
HRESULT WINAPI PullPin_Disconnect(IPin * iface);
HRESULT WINAPI PullPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv);
HRESULT WINAPI PullPin_EndOfStream(IPin * iface);
HRESULT WINAPI PullPin_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt);
HRESULT WINAPI PullPin_BeginFlush(IPin * iface);
HRESULT WINAPI PullPin_EndFlush(IPin * iface);
HRESULT WINAPI PullPin_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate);
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/* Thread interaction functions: Hold the thread_lock before calling them */
HRESULT PullPin_StartProcessing(PullPin * This);
HRESULT PullPin_PauseProcessing(PullPin * This);
HRESULT PullPin_WaitForStateChange(PullPin * This, DWORD dwMilliseconds);
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/* COM helpers */
static inline PullPin *impl_PullPin_from_IPin( IPin *iface )
{
return CONTAINING_RECORD(iface, PullPin, pin.IPin_iface);
}