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Merge pull request #18325 from alalek:issue_18166

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Alexander Alekhin 2020-09-14 18:17:58 +00:00
commit 9f69ca503a
1 changed files with 16 additions and 1 deletions
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17
modules/imgcodecs/src/loadsave.cpp
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@ -189,7 +189,19 @@ struct ImageCodecInitializer
std::vector<ImageEncoder> encoders;
};
static ImageCodecInitializer codecs;
static
ImageCodecInitializer& getCodecs()
{
#ifdef CV_CXX11
static ImageCodecInitializer g_codecs;
return g_codecs;
#else
// C++98 doesn't guarantee correctness of multi-threaded initialization of static global variables
// (memory leak here is not critical, use C++11 to avoid that)
static ImageCodecInitializer* g_codecs = new ImageCodecInitializer();
return *g_codecs;
#endif
}
/**
* Find the decoders
@ -203,6 +215,7 @@ static ImageDecoder findDecoder( const String& filename ) {
size_t i, maxlen = 0;
/// iterate through list of registered codecs
ImageCodecInitializer& codecs = getCodecs();
for( i = 0; i < codecs.decoders.size(); i++ )
{
size_t len = codecs.decoders[i]->signatureLength();
@ -240,6 +253,7 @@ static ImageDecoder findDecoder( const Mat& buf )
if( buf.rows*buf.cols < 1 || !buf.isContinuous() )
return ImageDecoder();
ImageCodecInitializer& codecs = getCodecs();
for( i = 0; i < codecs.decoders.size(); i++ )
{
size_t len = codecs.decoders[i]->signatureLength();
@ -272,6 +286,7 @@ static ImageEncoder findEncoder( const String& _ext )
for( ext++; len < 128 && isalnum(ext[len]); len++ )
;
ImageCodecInitializer& codecs = getCodecs();
for( size_t i = 0; i < codecs.encoders.size(); i++ )
{
String description = codecs.encoders[i]->getDescription();