support openning raw Bayer (as gray YUV400) and CMYK (as RGBA) file

YUViewLib/src/playlistitem/playlistItemRawFile.cpp

@@ -54,6 +54,8 @@ namespace
 constexpr auto YUV_EXTENSIONS  = {"yuv", "nv12", "y4m"};
 constexpr auto RGB_EXTENSIONS  = {"rgb", "gbr", "bgr", "brg"};
 constexpr auto RGBA_EXTENSIONS = {"rgba", "gbra", "bgra", "brga", "argb", "agbr", "abgr", "abrg"};
+constexpr auto RAW_EXTENSIONS  = {"raw",};
+constexpr auto CMYK_EXTENSIONS  = {"cmyk",};
 
 bool isInExtensions(const QString &testValue, const std::initializer_list<const char *> &extensions)
 {
@@ -94,12 +96,12 @@ playlistItemRawFile::playlistItemRawFile(const QString &rawFilePath,
   // Create a new videoHandler instance depending on the input format
   QFileInfo  fi(rawFilePath);
   const auto ext = fi.suffix().toLower();
-  if (isInExtensions(ext, YUV_EXTENSIONS) || fmt.toLower() == "yuv")
+  if (isInExtensions(ext, YUV_EXTENSIONS) || isInExtensions(ext, RAW_EXTENSIONS) || fmt.toLower() == "yuv")
   {
     this->video     = std::make_unique<video::yuv::videoHandlerYUV>();
     this->rawFormat = video::RawFormat::YUV;
   }
-  else if (isInExtensions(ext, RGB_EXTENSIONS) || isInExtensions(ext, RGBA_EXTENSIONS) ||
+  else if (isInExtensions(ext, RGB_EXTENSIONS) || isInExtensions(ext, RGBA_EXTENSIONS) || isInExtensions(ext, CMYK_EXTENSIONS) ||
            fmt.toLower() == "rgb")
   {
     this->video     = std::make_unique<video::rgb::videoHandlerRGB>();
@@ -568,7 +570,7 @@ ValuePairListSets playlistItemRawFile::getPixelValues(const QPoint &pixelPos, in
 void playlistItemRawFile::getSupportedFileExtensions(QStringList &allExtensions,
                                                      QStringList &filters)
 {
-  for (const auto &extensionsList : {YUV_EXTENSIONS, RGB_EXTENSIONS, RGBA_EXTENSIONS})
+  for (const auto &extensionsList : {YUV_EXTENSIONS, RGB_EXTENSIONS, RGBA_EXTENSIONS, RAW_EXTENSIONS, CMYK_EXTENSIONS})
     for (const auto &extension : extensionsList)
       allExtensions.append(QString(extension));
 
@@ -577,6 +579,8 @@ void playlistItemRawFile::getSupportedFileExtensions(QStringList &allExtensions,
   filters.append("Raw RGBA File (*.rgba *.rbga *.grba *.gbra *.brga *.bgra *.argb *.arbg *.agrb "
                  "*.agbr *.abrg *.abgr)");
   filters.append("YUV4MPEG2 File (*.y4m)");
+  filters.append("Raw Bayer File (*.raw)");
+  filters.append("Raw CMYK File (*.cmyk)");
 }
 
 void playlistItemRawFile::reloadItemSource()

YUViewLib/src/video/rgb/PixelFormatRGBGuess.cpp

@@ -136,6 +136,16 @@ guessFormatFromSizeAndName(const QFileInfo &fileInfo, Size frameSize, int64_t fi
 
   auto ext = fileInfo.suffix().toLower().toStdString();
 
+  if (fileInfo.suffix().toLower() == "cmyk")
+  {
+    auto fmt = PixelFormatRGB(8, DataLayout::Packed, ChannelOrder::RGB, AlphaMode::Last);
+    auto bpf = fmt.bytesPerFrame(frameSize);
+    if (bpf != 0 && (fileSize % bpf) == 0)
+    {
+      return fmt;
+    }
+  }
+
   for (const auto &name : {fileName, dirName})
   {
     for (auto format :

YUViewLib/src/video/yuv/PixelFormatYUV.cpp

@@ -44,11 +44,11 @@ void getColorConversionCoefficients(ColorConversion colorConversion, int RGBConv
   // cGV, cBU].
   const int yuvRgbConvCoeffs[6][5] = {
       {76309, 117489, -13975, -34925, 138438}, // BT709_LimitedRange
-      {65536, 103206, -12276, -30679, 121608}, // BT709_FullRange
+      {65536, 103206, -12276, -30679, 121609}, // BT709_FullRange
       {76309, 104597, -25675, -53279, 132201}, // BT601_LimitedRange
-      {65536, 91881, -22553, -46802, 116129},  // BT601_FullRange
-      {76309, 110013, -12276, -42626, 140363}, // BT2020_LimitedRange
-      {65536, 96638, -10783, -37444, 123299}   // BT2020_FullRange
+      {65536, 91881, -22553, -46802, 116130},  // BT601_FullRange
+      {76309, 110014, -12277, -42626, 140363}, // BT2020_LimitedRange
+      {65536, 96639, -10784, -37444, 123299}   // BT2020_FullRange
   };
   const auto index = ColorConversionMapper.indexOf(colorConversion);
   for (unsigned i = 0; i < 5; i++)

YUViewLib/src/video/yuv/PixelFormatYUV.h

@@ -55,7 +55,7 @@ R = Y                  + V*(1-Kr)
 G = Y - U*(1-Kb)*Kb/Kg - V*(1-Kr)*Kr/Kg
 B = Y + U*(1-Kb)
 To respect value range of Y in [16:235] and U/V in [16:240], the matrix entries need to be scaled
-by 255/219 for Y and 255/112 for U/V In this software color conversion is performed with 16bit
+by 255/219 for Y and 255/224 for U/V In this software color conversion is performed with 16bit
 precision. Thus, further scaling with 2^16 is performed to get all factors as integers.
 */
 enum class ColorConversion

YUViewLib/src/video/yuv/PixelFormatYUVGuess.cpp

@@ -249,6 +249,13 @@ PixelFormatYUV guessFormatFromSizeAndName(const Size       size,
       return fmt;
   }
 
+  if (fileInfo.suffix().toLower() == "raw")
+  {
+    auto fmt = PixelFormatYUV(Subsampling::YUV_400, bitDepth, PlaneOrder::YUV, false, {}, true);
+    if (checkFormat(fmt, size, fileSize))
+      return fmt;
+  }
+
   for (const auto &name : {fileName, dirName})
   {
     // Check if the filename contains NV12