Fixing some static analysis issues

modules/imgcodecs/src/grfmt_base.cpp

@@ -96,6 +96,7 @@ ImageDecoder BaseImageDecoder::newDecoder() const
 
 BaseImageEncoder::BaseImageEncoder()
 {
+    m_buf = 0;
     m_buf_supported = false;
 }
 

modules/imgcodecs/src/grfmt_bmp.cpp

@@ -55,6 +55,9 @@ BmpDecoder::BmpDecoder()
     m_signature = fmtSignBmp;
     m_offset = -1;
     m_buf_supported = true;
+    m_origin = 0;
+    m_bpp = 0;
+    m_rle_code = BMP_RGB;
 }
 
 
@@ -191,7 +194,7 @@ bool  BmpDecoder::readData( Mat& img )
     uchar* data = img.ptr();
     int step = (int)img.step;
     bool color = img.channels() > 1;
-    uchar  gray_palette[256];
+    uchar  gray_palette[256] = {0};
     bool   result = false;
     int  src_pitch = ((m_width*(m_bpp != 15 ? m_bpp : 16) + 7)/8 + 3) & -4;
     int  nch = color ? 3 : 1;

modules/imgcodecs/src/grfmt_exr.cpp

@@ -81,6 +81,13 @@ ExrDecoder::ExrDecoder()
     m_signature = "\x76\x2f\x31\x01";
     m_file = 0;
     m_red = m_green = m_blue = 0;
+    m_type = ((Imf::PixelType)0);
+    m_iscolor = false;
+    m_bit_depth = 0;
+    m_isfloat = false;
+    m_ischroma = false;
+    m_native_depth = false;
+
 }
 
 

modules/imgcodecs/src/grfmt_jpeg.cpp

@@ -341,7 +341,7 @@ int my_jpeg_load_dht (struct jpeg_decompress_struct *info, unsigned char *dht,
 
     JHUFF_TBL **hufftbl;
     unsigned char bits[17];
-    unsigned char huffval[256];
+    unsigned char huffval[256] = {0};
 
     while (length > 16)
     {

modules/imgcodecs/src/grfmt_pam.cpp

@@ -324,6 +324,9 @@ PAMDecoder::PAMDecoder()
     m_buf_supported = true;
     bit_mode = false;
     selected_fmt = CV_IMWRITE_PAM_FORMAT_NULL;
+    m_maxval = 0;
+    m_channels = 0;
+    m_sampledepth = 0;
 }
 
 

modules/imgcodecs/src/grfmt_png.cpp

@@ -91,6 +91,7 @@ PngDecoder::PngDecoder()
     m_f = 0;
     m_buf_supported = true;
     m_buf_pos = 0;
+    m_bit_depth = 0;
 }
 
 

modules/imgcodecs/src/grfmt_pxm.cpp

@@ -94,6 +94,9 @@ PxMDecoder::PxMDecoder()
 {
     m_offset = -1;
     m_buf_supported = true;
+    m_bpp = 0;
+    m_binary = false;
+    m_maxval = 0;
 }
 
 

modules/imgcodecs/src/grfmt_sunras.cpp

@@ -54,6 +54,10 @@ SunRasterDecoder::SunRasterDecoder()
 {
     m_offset = -1;
     m_signature = fmtSignSunRas;
+    m_bpp = 0;
+    m_encoding = RAS_STANDARD;
+    m_maptype = RMT_NONE;
+    m_maplength = 0;
 }
 
 
@@ -157,7 +161,7 @@ bool  SunRasterDecoder::readData( Mat& img )
     int color = img.channels() > 1;
     uchar* data = img.ptr();
     int step = (int)img.step;
-    uchar  gray_palette[256];
+    uchar  gray_palette[256] = {0};
     bool   result = false;
     int  src_pitch = ((m_width*m_bpp + 7)/8 + 1) & -2;
     int  nch = color ? 3 : 1;

modules/imgcodecs/src/grfmt_webp.cpp

@@ -62,6 +62,7 @@ namespace cv
 WebPDecoder::WebPDecoder()
 {
     m_buf_supported = true;
+    channels = 0;
 }
 
 WebPDecoder::~WebPDecoder() {}