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dshow: Only show debugging messages if environment variable OPENCV_DSHOW_DEBUG is explicitly set to non-zero

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Based on discussion at: https://github.com/opencv/opencv/pull/9051
This commit is contained in:
Rink Springer 2017-07-13 11:44:20 +02:00 committed by Rink Springer
parent 3ce1bca670
commit df7fb00c21
1 changed files with 9 additions and 20 deletions
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29
modules/videoio/src/cap_dshow.cpp
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@ -337,11 +337,17 @@ interface ISampleGrabber : public IUnknown
#ifdef _DEBUG
#include <strsafe.h>
//change for verbose debug info
static bool gs_verbose = true;
static void DebugPrintOut(const char *format, ...)
{
static int gs_verbose = -1;
if (gs_verbose < 0)
{
// Fetch initial debug state from environment - defaults to disabled
const char* s = getenv("OPENCV_DSHOW_DEBUG");
gs_verbose = s != NULL && atoi(s) != 0;
}
if (gs_verbose)
{
va_list args;
@ -487,9 +493,6 @@ class videoInput{
videoInput();
~videoInput();
//turns off console messages - default is to print messages
static void setVerbose(bool _verbose);
//Functions in rough order they should be used.
static int listDevices(bool silent = false);
@ -1120,20 +1123,6 @@ videoInput::videoInput(){
}
// ----------------------------------------------------------------------
// static - set whether messages get printed to console or not
//
// ----------------------------------------------------------------------
void videoInput::setVerbose(bool _verbose){
#ifdef _DEBUG
gs_verbose = _verbose;
#else
(void)_verbose; // Suppress 'unreferenced parameter' warning
#endif
}
// ----------------------------------------------------------------------
// change to use callback or regular capture
// callback tells you when a new frame has arrived