qcam: Add DNGWriter

Add an initial DNG file writer. The writer can only deal with a small
set of pixel formats. The generated file is consumable by standard
tools. The writer needs to be extended to write more metadata to the
generated file.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 17 insertions, 3 deletions

diff --git a/src/qcam/meson.build b/src/qcam/meson.build
index 895264be..949ef614 100644
--- a/src/qcam/meson.build
+++ b/src/qcam/meson.build
@@ -1,9 +1,9 @@
 qcam_sources = files([
+    '../cam/options.cpp',
+    '../cam/stream_options.cpp',
     'format_converter.cpp',
     'main.cpp',
     'main_window.cpp',
-    '../cam/options.cpp',
-    '../cam/stream_options.cpp',
     'viewfinder.cpp',
 ])
 
@@ -23,8 +23,22 @@ qt5_dep = dependency('qt5',
                      required : false)
 
 if qt5_dep.found()
+    qcam_deps = [
+        libcamera_dep,
+        qt5_dep,
+    ]
+
     qt5_cpp_args = [ '-DQT_NO_KEYWORDS' ]
 
+    tiff_dep = dependency('libtiff-4', required : false)
+    if tiff_dep.found()
+        qt5_cpp_args += [ '-DHAVE_TIFF' ]
+        qcam_deps += [ tiff_dep ]
+        qcam_sources += files([
+            'dng_writer.cpp',
+        ])
+    endif
+
     # gcc 9 introduced a deprecated-copy warning that is triggered by Qt until
     # Qt 5.13. clang 10 introduced the same warning, but detects more issues
     # that are not fixed in Qt yet. Disable the warning manually in both cases.
@@ -40,6 +54,6 @@ if qt5_dep.found()
 
     qcam  = executable('qcam', qcam_sources, resources,
                        install : true,
-                       dependencies : [libcamera_dep, qt5_dep],
+                       dependencies : qcam_deps,
                        cpp_args : qt5_cpp_args)
 endif