[libcamera-devel] [PATCH v4 1/3] android: camera_stream: Create post processor in configure()

[Hirokazu Honda]

CameraStream creates PostProcessor and FrameBufferAllocator in
the constructor. CameraStream assumes that a used post processor
is JPEG post processor. Since we need to support various post
processors, we would rather move the creation to configure() so
as to return an error code if no proper post processor is found.
This also moves FrameBufferAllocator and Mutex creation for
consistency.

Signed-off-by: Hirokazu Honda <hiroh at chromium.org>
Reviewed-by: Jacopo Mondi <jacopo at jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 src/android/camera_device.h   |  1 +
 src/android/camera_stream.cpp | 37 +++++++++++++++++++----------------
 2 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/src/android/camera_device.h b/src/android/camera_device.h
index a5576927..296c2f18 100644
--- a/src/android/camera_device.h
+++ b/src/android/camera_device.h
@@ -48,6 +48,7 @@ public:
 
 	unsigned int id() const { return id_; }
 	camera3_device_t *camera3Device() { return &camera3Device_; }
+	const CameraCapabilities *capabilities() const { return &capabilities_; }
 	const std::shared_ptr<libcamera::Camera> &camera() const { return camera_; }
 
 	const std::string &maker() const { return maker_; }
diff --git a/src/android/camera_stream.cpp b/src/android/camera_stream.cpp
index 01909ec7..3fce29c1 100644
--- a/src/android/camera_stream.cpp
+++ b/src/android/camera_stream.cpp
@@ -10,6 +10,7 @@
 #include <sys/mman.h>
 
 #include "camera_buffer.h"
+#include "camera_capabilities.h"
 #include "camera_device.h"
 #include "camera_metadata.h"
 #include "jpeg/post_processor_jpeg.h"
@@ -47,20 +48,6 @@ CameraStream::CameraStream(CameraDevice *const cameraDevice,
 	: cameraDevice_(cameraDevice), config_(config), type_(type),
 	  camera3Stream_(camera3Stream), index_(index)
 {
-	if (type_ == Type::Internal || type_ == Type::Mapped) {
-		/*
-		 * \todo There might be multiple post-processors. The logic
-		 * which should be instantiated here, is deferred for the
-		 * future. For now, we only have PostProcessorJpeg and that
-		 * is what we instantiate here.
-		 */
-		postProcessor_ = std::make_unique<PostProcessorJpeg>(cameraDevice_);
-	}
-
-	if (type == Type::Internal) {
-		allocator_ = std::make_unique<FrameBufferAllocator>(cameraDevice_->camera());
-		mutex_ = std::make_unique<std::mutex>();
-	}
 }
 
 const StreamConfiguration &CameraStream::configuration() const
@@ -75,15 +62,31 @@ Stream *CameraStream::stream() const
 
 int CameraStream::configure()
 {
-	if (postProcessor_) {
+	if (type_ == Type::Internal || type_ == Type::Mapped) {
+		const PixelFormat outFormat =
+			cameraDevice_->capabilities()->toPixelFormat(camera3Stream_->format);
 		StreamConfiguration output = configuration();
-		output.pixelFormat = formats::MJPEG;
+		output.pixelFormat = outFormat;
+
+		switch (outFormat) {
+		case formats::MJPEG:
+			postProcessor_ = std::make_unique<PostProcessorJpeg>(cameraDevice_);
+			break;
+
+		default:
+			LOG(HAL, Error) << "Unsupported format: " << outFormat;
+			return -EINVAL;
+		}
+
 		int ret = postProcessor_->configure(configuration(), output);
 		if (ret)
 			return ret;
 	}
 
-	if (allocator_) {
+	if (type_ == Type::Internal) {
+		allocator_ = std::make_unique<FrameBufferAllocator>(cameraDevice_->camera());
+		mutex_ = std::make_unique<std::mutex>();
+
 		int ret = allocator_->allocate(stream());
 		if (ret < 0)
 			return ret;
-- 
2.33.0.259.gc128427fd7-goog