dlls/quartz/pin.h

   1 /*
   2  * IPin function declarations to allow inheritance
   3  *
   4  * Copyright 2003 Robert Shearman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 /* This function will process incoming samples to the pin.
  22  * Any return value valid in IMemInputPin::Receive is allowed here
  23  *
  24  * Cookie is the cookie that was set when requesting the buffer, if you don't
  25  * implement custom requesting, you can safely ignore this
  26  */
  27 typedef HRESULT (* SAMPLEPROC_PUSH)(LPVOID userdata, IMediaSample * pSample);
  28 typedef HRESULT (* SAMPLEPROC_PULL)(LPVOID userdata, IMediaSample * pSample, DWORD_PTR cookie);
  29
  30 /* This function will determine whether a type is supported or not.
  31  * It is allowed to return any error value (within reason), as opposed
  32  * to IPin::QueryAccept which is only allowed to return S_OK or S_FALSE.
  33  */
  34 typedef HRESULT (* QUERYACCEPTPROC)(LPVOID userdata, const AM_MEDIA_TYPE * pmt);
  35
  36 /* This function is called prior to finalizing a connection with
  37  * another pin and can be used to get things from the other pin
  38  * like IMemInput interfaces.
  39  *
  40  * props contains some defaults, but you can safely override them to your liking
  41  */
  42 typedef HRESULT (* PRECONNECTPROC)(IPin * iface, IPin * pConnectPin, ALLOCATOR_PROPERTIES *props);
  43
  44 /* This function is called whenever a cleanup operation has to occur,
  45  * this is usually after a flush, seek, or end of stream notification.
  46  * This code may even be repeated multiple times, so build your code to
  47  * tolerate this behavior. Return value is ignored and should be S_OK.
  48  */
  49 typedef HRESULT (* CLEANUPPROC) (LPVOID userdata);
  50
  51 /* This function is called whenever a request for a new sample is made,
  52  * If you implement it (it can be NULL for default behavior), you have to
  53  * call IMemAllocator_GetBuffer and IMemAllocator_RequestBuffer
  54  * This is useful if you want to request more than 1 buffer at simultaneously
  55  *
  56  * This will also cause the Sample Proc to be called with empty buffers to indicate
  57  * failure in retrieving the sample.
  58  */
  59 typedef HRESULT (* REQUESTPROC) (LPVOID userdata);
  60
  61 /* This function is called after processing is done (for whatever reason that is caused)
  62  * This is useful if you create processing threads that need to die
  63  */
  64 typedef HRESULT (* STOPPROCESSPROC) (LPVOID userdata);
  65
  66 #define ALIGNDOWN(value,boundary) ((value)/(boundary)*(boundary))
  67 #define ALIGNUP(value,boundary) (ALIGNDOWN((value)+(boundary)-1, (boundary)))
  68
  69 typedef struct IPinImpl
  70 {
  71         const struct IPinVtbl * lpVtbl;
  72         LONG refCount;
  73         LPCRITICAL_SECTION pCritSec;
  74         PIN_INFO pinInfo;
  75         IPin * pConnectedTo;
  76         AM_MEDIA_TYPE mtCurrent;
  77         ENUMMEDIADETAILS enumMediaDetails;
  78         QUERYACCEPTPROC fnQueryAccept;
  79         LPVOID pUserData;
  80 } IPinImpl;
  81
  82 typedef struct InputPin
  83 {
  84         /* inheritance C style! */
  85         IPinImpl pin;
  86
  87         const IMemInputPinVtbl * lpVtblMemInput;
  88         IMemAllocator * pAllocator;
  89         SAMPLEPROC_PUSH fnSampleProc;
  90         CLEANUPPROC fnCleanProc;
  91         REFERENCE_TIME tStart;
  92         REFERENCE_TIME tStop;
  93         double dRate;
  94         BOOL flushing, end_of_stream;
  95         IMemAllocator *preferred_allocator;
  96 } InputPin;
  97
  98 typedef struct OutputPin
  99 {
 100         /* inheritance C style! */
 101         IPinImpl pin;
 102
 103         IMemInputPin * pMemInputPin;
 104         HRESULT (* pConnectSpecific)(IPin * iface, IPin * pReceiver, const AM_MEDIA_TYPE * pmt);
 105         BOOL custom_allocator;
 106         IMemAllocator *alloc;
 107         BOOL readonly;
 108         ALLOCATOR_PROPERTIES allocProps;
 109 } OutputPin;
 110
 111 typedef struct PullPin
 112 {
 113         /* inheritance C style! */
 114         IPinImpl pin;
 115
 116         REFERENCE_TIME rtStart, rtCurrent, rtNext, rtStop;
 117         IAsyncReader * pReader;
 118         IMemAllocator * pAlloc;
 119         SAMPLEPROC_PULL fnSampleProc;
 120         PRECONNECTPROC fnPreConnect;
 121         REQUESTPROC fnCustomRequest;
 122         CLEANUPPROC fnCleanProc;
 123         STOPPROCESSPROC fnDone;
 124         double dRate;
 125         BOOL stop_playback;
 126         DWORD cbAlign;
 127
 128         /* Any code that touches the thread must hold the thread lock,
 129          * lock order: thread_lock and then the filter critical section
 130          * also signal thread_sleepy so the thread knows to wake up
 131          */
 132         CRITICAL_SECTION thread_lock;
 133         HANDLE hThread;
 134         DWORD requested_state;
 135         HANDLE hEventStateChanged, thread_sleepy;
 136         DWORD state;
 137 } PullPin;
 138
 139 #define Req_Sleepy 0
 140 #define Req_Die    1
 141 #define Req_Run    2
 142 #define Req_Pause  3
 143
 144 /*** Constructors ***/
 145 HRESULT InputPin_Construct(const IPinVtbl *InputPin_Vtbl, const PIN_INFO * pPinInfo, SAMPLEPROC_PUSH pSampleProc, LPVOID pUserData, QUERYACCEPTPROC pQueryAccept, CLEANUPPROC pCleanUp, LPCRITICAL_SECTION pCritSec, IMemAllocator *, IPin ** ppPin);
 146 HRESULT OutputPin_Construct(const IPinVtbl *OutputPin_Vtbl, LONG outputpin_size, const PIN_INFO * pPinInfo, ALLOCATOR_PROPERTIES *props, LPVOID pUserData, QUERYACCEPTPROC pQueryAccept, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
 147 HRESULT PullPin_Construct(const IPinVtbl *PullPin_Vtbl, const PIN_INFO * pPinInfo, SAMPLEPROC_PULL pSampleProc, LPVOID pUserData, QUERYACCEPTPROC pQueryAccept, CLEANUPPROC pCleanUp, STOPPROCESSPROC, REQUESTPROC pCustomRequest, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
 148
 149 /**************************/
 150 /*** Pin Implementation ***/
 151
 152 /* Common */
 153 ULONG   WINAPI IPinImpl_AddRef(IPin * iface);
 154 HRESULT WINAPI IPinImpl_Disconnect(IPin * iface);
 155 HRESULT WINAPI IPinImpl_ConnectedTo(IPin * iface, IPin ** ppPin);
 156 HRESULT WINAPI IPinImpl_ConnectionMediaType(IPin * iface, AM_MEDIA_TYPE * pmt);
 157 HRESULT WINAPI IPinImpl_QueryPinInfo(IPin * iface, PIN_INFO * pInfo);
 158 HRESULT WINAPI IPinImpl_QueryDirection(IPin * iface, PIN_DIRECTION * pPinDir);
 159 HRESULT WINAPI IPinImpl_QueryId(IPin * iface, LPWSTR * Id);
 160 HRESULT WINAPI IPinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt);
 161 HRESULT WINAPI IPinImpl_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum);
 162 HRESULT WINAPI IPinImpl_QueryInternalConnections(IPin * iface, IPin ** apPin, ULONG * cPin);
 163
 164 /* Input Pin */
 165 HRESULT WINAPI InputPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv);
 166 ULONG   WINAPI InputPin_Release(IPin * iface);
 167 HRESULT WINAPI InputPin_Connect(IPin * iface, IPin * pConnector, const AM_MEDIA_TYPE * pmt);
 168 HRESULT WINAPI InputPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt);
 169 HRESULT WINAPI InputPin_EndOfStream(IPin * iface);
 170 HRESULT WINAPI InputPin_BeginFlush(IPin * iface);
 171 HRESULT WINAPI InputPin_EndFlush(IPin * iface);
 172 HRESULT WINAPI InputPin_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate);
 173
 174 /* Output Pin */
 175 HRESULT WINAPI OutputPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv);
 176 ULONG   WINAPI OutputPin_Release(IPin * iface);
 177 HRESULT WINAPI OutputPin_Connect(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt);
 178 HRESULT WINAPI OutputPin_Disconnect(IPin * iface);
 179 HRESULT WINAPI OutputPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt);
 180 HRESULT WINAPI OutputPin_EndOfStream(IPin * iface);
 181 HRESULT WINAPI OutputPin_BeginFlush(IPin * iface);
 182 HRESULT WINAPI OutputPin_EndFlush(IPin * iface);
 183 HRESULT WINAPI OutputPin_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate);
 184
 185 HRESULT OutputPin_CommitAllocator(OutputPin * This);
 186 HRESULT OutputPin_DecommitAllocator(OutputPin * This);
 187 HRESULT OutputPin_GetDeliveryBuffer(OutputPin * This, IMediaSample ** ppSample, REFERENCE_TIME * tStart, REFERENCE_TIME * tStop, DWORD dwFlags);
 188 HRESULT OutputPin_SendSample(OutputPin * This, IMediaSample * pSample);
 189 HRESULT OutputPin_DeliverDisconnect(OutputPin * This);
 190
 191 /* Pull Pin */
 192 HRESULT WINAPI PullPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt);
 193 HRESULT WINAPI PullPin_Disconnect(IPin * iface);
 194 HRESULT WINAPI PullPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv);
 195 ULONG   WINAPI PullPin_Release(IPin * iface);
 196 HRESULT WINAPI PullPin_EndOfStream(IPin * iface);
 197 HRESULT WINAPI PullPin_BeginFlush(IPin * iface);
 198 HRESULT WINAPI PullPin_EndFlush(IPin * iface);
 199 HRESULT WINAPI PullPin_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate);
 200
 201 /* Thread interaction functions: Hold the thread_lock before calling them */
 202 HRESULT PullPin_StartProcessing(PullPin * This);
 203 HRESULT PullPin_PauseProcessing(PullPin * This);
 204 HRESULT PullPin_WaitForStateChange(PullPin * This, DWORD dwMilliseconds);