I have added a function trace to my filtsdk-1_05 based filter as follows:
| CODE | void FnTrace(const char *str, int indentAdjust, int calls, int frame) {
char intStrBuf[INTSTRBUFSZ + 1];
if (indentAdjust < 0) { // pre-adjust the indent (usually -1 to close a block)
FTIndent += indentAdjust;
}
for (int i = 1; i <= FTIndent; ++i) {
OutputDebugString(" ");
}
OutputDebugString(str);
if (indentAdjust >= 0 && frame >= 0) {
_itoa_s(frame, intStrBuf, INTSTRBUFSZ, 10);
OutputDebugString(" frame["); OutputDebugString(intStrBuf); OutputDebugString("]");
}
if (calls >= 0) {
_itoa_s(calls, intStrBuf, INTSTRBUFSZ, 10);
OutputDebugString(" call["); OutputDebugString(intStrBuf); OutputDebugString("]");
}
OutputDebugString("\n");
if (indentAdjust > 0) { FTIndent += indentAdjust; } // post-adjust the indent (usually +1 to start a block)
}
// In the StartProc, RunProc and EndProc functions...
int Start/Run/EndProc(FilterActivation *fa, const FilterFunctions *ff) {
static int calls = 0;
FnTrace("Start/Run/EndProc {", 1, ++calls, mfd->currentFrame);
...
FnTrace("}", -1, -1, -1);
return 0;
} |
The FnTace output gets intermingled with normal Debug output in MSVC2005, as it would.
The stripped output of the trace is:| CODE | 'VirtualDub.exe': Loaded 'C:\Program Files\VirtualDub\VirtualDub.exe', Symbols loaded.
... Loading stuff
StartProc frame[0] call[1] i.e. 1st call of StartProc
RunProc frame[0] call[1]
EndProc frame[1] call[1]
StartProc frame[1] call[2] i.e. 2nd call of StartProc
EndProc frame[1] call[2]
StartProc frame[1] call[3]
EndProc frame[1] call[3]
StartProc frame[1] call[4]
'VirtualDub.exe': Loaded 'C:\WINDOWS\system32\wdmaud.drv', No symbols loaded.
... Loading stuff
RunProc frame[1] call[2]
RunProc frame[1] call[3] Note: my frame numbers are base 1, this is the first frame of the filtering
RunProc frame[2] call[4]
... (frames 3 to 181)
RunProc frame[182] call[184]
The thread 'Dub-I/O' (0xf80) has exited with code 0 (0x0).
RunProc frame[183] call[185]
... (frames 184 to 212)
RunProc frame[213] call[215]
The thread 'Win32 Thread' (0xe60) has exited with code 0 (0x0).
exiting stuff
...
EndProc frame[214] call[4] Note: Frame 214 is? the last frame of src.
StartProc frame[214] call[5]
RunProc frame[214] call[216]
'VirtualDub.exe': Unloaded 'C:\WINDOWS\system32\d3d9.dll'
... unloading and exiting stuff
The program '[3624] VirtualDub.exe: Native' has exited with code 0 (0x0). |
I was anticipating something simpler like:
| CODE | load stuff
startproc
runproc
... (one RunProc for each frame)
runproc
endproc
unload stuff |
Should it to be anticipated that Start/Run/EndProc will go through several cycles during one filter instance?
|