qcam: Pass request metadata to DNG writer

The DNG writer will use the metadata to populate DNG tags.

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

src/qcam/dng_writer.cpp

@@ -101,6 +101,7 @@ static const std::map<PixelFormat, FormatInfo> formatInfo = {
 
 int DNGWriter::write(const char *filename, const Camera *camera,
 		     const StreamConfiguration &config,
+		     const ControlList &metadata,
 		     const FrameBuffer *buffer, const void *data)
 {
 	const auto it = formatInfo.find(config.pixelFormat);

src/qcam/dng_writer.h

@@ -12,6 +12,7 @@
 
 #include <libcamera/buffer.h>
 #include <libcamera/camera.h>
+#include <libcamera/controls.h>
 #include <libcamera/stream.h>
 
 using namespace libcamera;
@@ -21,6 +22,7 @@ class DNGWriter
 public:
 	static int write(const char *filename, const Camera *camera,
 			 const StreamConfiguration &config,
+			 const ControlList &metadata,
 			 const FrameBuffer *buffer, const void *data);
 };
 

src/qcam/main_window.cpp

@@ -549,7 +549,7 @@ void MainWindow::captureRaw()
 	captureRaw_ = true;
 }
 
-void MainWindow::processRaw(FrameBuffer *buffer)
+void MainWindow::processRaw(FrameBuffer *buffer, const ControlList &metadata)
 {
 #ifdef HAVE_DNG
 	QString defaultPath = QStandardPaths::writableLocation(QStandardPaths::PicturesLocation);
@@ -559,7 +559,7 @@ void MainWindow::processRaw(FrameBuffer *buffer)
 	if (!filename.isEmpty()) {
 		const MappedBuffer &mapped = mappedBuffers_[buffer];
 		DNGWriter::write(filename.toStdString().c_str(), camera_.get(),
-				 rawStream_->configuration(), buffer,
+				 rawStream_->configuration(), metadata, buffer,
 				 mapped.memory);
 	}
 #endif
@@ -586,7 +586,7 @@ void MainWindow::requestComplete(Request *request)
 	 */
 	{
 		QMutexLocker locker(&mutex_);
-		doneQueue_.enqueue(request->buffers());
+		doneQueue_.enqueue({ request->buffers(), request->metadata() });
 	}
 
 	QCoreApplication::postEvent(this, new CaptureEvent);
@@ -599,22 +599,22 @@ void MainWindow::processCapture()
 	 * if stopCapture() has been called while a CaptureEvent was posted but
 	 * not processed yet. Return immediately in that case.
 	 */
-	std::map<Stream *, FrameBuffer *> buffers;
+	CaptureRequest request;
 
 	{
 		QMutexLocker locker(&mutex_);
 		if (doneQueue_.isEmpty())
 			return;
 
-		buffers = doneQueue_.dequeue();
+		request = doneQueue_.dequeue();
 	}
 
 	/* Process buffers. */
-	if (buffers.count(vfStream_))
+	if (request.buffers_.count(vfStream_))
-		processViewfinder(buffers[vfStream_]);
+		processViewfinder(request.buffers_[vfStream_]);
 
-	if (buffers.count(rawStream_))
+	if (request.buffers_.count(rawStream_))
-		processRaw(buffers[rawStream_]);
+		processRaw(request.buffers_[rawStream_], request.metadata_);
 }
 
 void MainWindow::processViewfinder(FrameBuffer *buffer)

src/qcam/main_window.h

@@ -20,6 +20,7 @@
 #include <libcamera/buffer.h>
 #include <libcamera/camera.h>
 #include <libcamera/camera_manager.h>
+#include <libcamera/controls.h>
 #include <libcamera/framebuffer_allocator.h>
 #include <libcamera/stream.h>
 
@@ -37,6 +38,23 @@ enum {
 	OptStream = 's',
 };
 
+class CaptureRequest
+{
+public:
+	CaptureRequest()
+	{
+	}
+
+	CaptureRequest(const std::map<Stream *, FrameBuffer *> &buffers,
+		       const ControlList &metadata)
+		: buffers_(buffers), metadata_(metadata)
+	{
+	}
+
+	std::map<Stream *, FrameBuffer *> buffers_;
+	ControlList metadata_;
+};
+
 class MainWindow : public QMainWindow
 {
 	Q_OBJECT
@@ -56,7 +74,7 @@ private Q_SLOTS:
 
 	void saveImageAs();
 	void captureRaw();
-	void processRaw(FrameBuffer *buffer);
+	void processRaw(FrameBuffer *buffer, const ControlList &metadata);
 
 	void queueRequest(FrameBuffer *buffer);
 
@@ -103,7 +121,7 @@ private:
 	Stream *vfStream_;
 	Stream *rawStream_;
 	std::map<Stream *, QQueue<FrameBuffer *>> freeBuffers_;
-	QQueue<std::map<Stream *, FrameBuffer *>> doneQueue_;
+	QQueue<CaptureRequest> doneQueue_;
 	QMutex mutex_; /* Protects freeBuffers_ and doneQueue_ */
 
 	uint64_t lastBufferTime_;