android: camera_stream: Plumb process() with Camera3RequestDescriptor

Data (or broader context) required for post processing of a camera request
is saved via Camera3RequestDescriptor. Instead of passing individual
arguments to CameraStream::process(), pass the Camera3RequestDescriptor
pointer to it. All the arguments necessary to run the post-processor can
be accessed from the descriptor.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>

src/android/camera_device.cpp

@@ -1153,9 +1153,8 @@ void CameraDevice::requestComplete(Request *request)
 			continue;
 		}
 
-		int ret = cameraStream->process(*src, buffer,
-						descriptor->settings_,
-						descriptor->resultMetadata_.get());
+		int ret = cameraStream->process(*src, buffer, descriptor);
+
 		/*
 		 * Return the FrameBuffer to the CameraStream now that we're
 		 * done processing it.

src/android/camera_stream.cpp

@@ -144,8 +144,7 @@ int CameraStream::waitFence(int fence)
 
 int CameraStream::process(const FrameBuffer &source,
 			  camera3_stream_buffer_t &camera3Dest,
-			  const CameraMetadata &requestMetadata,
-			  CameraMetadata *resultMetadata)
+			  Camera3RequestDescriptor *request)
 {
 	/* Handle waiting on fences on the destination buffer. */
 	int fence = camera3Dest.acquire_fence;
@@ -175,7 +174,7 @@ int CameraStream::process(const FrameBuffer &source,
 		return -EINVAL;
 	}
 
-	return postProcessor_->process(source, &dest, requestMetadata, resultMetadata);
+	return postProcessor_->process(source, &dest, request);
 }
 
 FrameBuffer *CameraStream::getBuffer()

src/android/camera_stream.h

@@ -19,8 +19,8 @@
 #include <libcamera/geometry.h>
 #include <libcamera/pixel_format.h>
 
+class Camera3RequestDescriptor;
 class CameraDevice;
-class CameraMetadata;
 class PostProcessor;
 
 class CameraStream
@@ -120,8 +120,7 @@ public:
 	int configure();
 	int process(const libcamera::FrameBuffer &source,
 		    camera3_stream_buffer_t &camera3Buffer,
-		    const CameraMetadata &requestMetadata,
-		    CameraMetadata *resultMetadata);
+		    Camera3RequestDescriptor *request);
 	libcamera::FrameBuffer *getBuffer();
 	void putBuffer(libcamera::FrameBuffer *buffer);
 

src/android/jpeg/post_processor_jpeg.cpp

@@ -11,6 +11,7 @@
 
 #include "../camera_device.h"
 #include "../camera_metadata.h"
+#include "../camera_request.h"
 #include "encoder_libjpeg.h"
 #include "exif.h"
 
@@ -99,14 +100,15 @@ void PostProcessorJpeg::generateThumbnail(const FrameBuffer &source,
 
 int PostProcessorJpeg::process(const FrameBuffer &source,
 			       CameraBuffer *destination,
-			       const CameraMetadata &requestMetadata,
-			       CameraMetadata *resultMetadata)
+			       Camera3RequestDescriptor *request)
 {
 	if (!encoder_)
 		return 0;
 
 	ASSERT(destination->numPlanes() == 1);
 
+	const CameraMetadata &requestMetadata = request->settings_;
+	CameraMetadata *resultMetadata = request->resultMetadata_.get();
 	camera_metadata_ro_entry_t entry;
 	int ret;
 

src/android/jpeg/post_processor_jpeg.h

@@ -24,8 +24,7 @@ public:
 		      const libcamera::StreamConfiguration &outcfg) override;
 	int process(const libcamera::FrameBuffer &source,
 		    CameraBuffer *destination,
-		    const CameraMetadata &requestMetadata,
-		    CameraMetadata *resultMetadata) override;
+		    Camera3RequestDescriptor *request) override;
 
 private:
 	void generateThumbnail(const libcamera::FrameBuffer &source,

src/android/post_processor.h

@@ -12,7 +12,7 @@
 
 #include "camera_buffer.h"
 
-class CameraMetadata;
+class Camera3RequestDescriptor;
 
 class PostProcessor
 {
@@ -23,8 +23,7 @@ public:
 			      const libcamera::StreamConfiguration &outCfg) = 0;
 	virtual int process(const libcamera::FrameBuffer &source,
 			    CameraBuffer *destination,
-			    const CameraMetadata &requestMetadata,
-			    CameraMetadata *resultMetadata) = 0;
+			    Camera3RequestDescriptor *request) = 0;
 };
 
 #endif /* __ANDROID_POST_PROCESSOR_H__ */

src/android/yuv/post_processor_yuv.cpp

@@ -51,8 +51,7 @@ int PostProcessorYuv::configure(const StreamConfiguration &inCfg,
 
 int PostProcessorYuv::process(const FrameBuffer &source,
 			      CameraBuffer *destination,
-			      [[maybe_unused]] const CameraMetadata &requestMetadata,
-			      [[maybe_unused]] CameraMetadata *metadata)
+			      [[maybe_unused]] Camera3RequestDescriptor *request)
 {
 	if (!isValidBuffers(source, *destination))
 		return -EINVAL;

src/android/yuv/post_processor_yuv.h

@@ -20,8 +20,7 @@ public:
 		      const libcamera::StreamConfiguration &outcfg) override;
 	int process(const libcamera::FrameBuffer &source,
 		    CameraBuffer *destination,
-		    const CameraMetadata &requestMetadata,
-		    CameraMetadata *metadata) override;
+		    Camera3RequestDescriptor *request) override;
 
 private:
 	bool isValidBuffers(const libcamera::FrameBuffer &source,