[libcamera-devel] [RFC PATCH 4/5] android: camera_stream: Notify process() status with a Signal
Umang Jain
umang.jain at ideasonboard.com
Thu Aug 26 23:30:15 CEST 2021
CameraStream takes care of any post-processing required via the
CameraStream::process(). Since the post-processor will be moved
to a separate thread (in subsequent commit), the caller of
CameraStream::process() should be able to get notified about the
status, in order to proceed further for completing the callbacks
to android framework.
Therefore, chain up to PostProcessor::processComplete signal in its
signal handler. Currently, we have only one post-processor in-use,
hence emit the corresponding CameraStream::PostProcessing value
according to the PostProcessor::status received in the signal handler.
Signed-off-by: Umang Jain <umang.jain at ideasonboard.com>
---
src/android/camera_stream.cpp | 17 +++++++++++++++++
src/android/camera_stream.h | 14 +++++++++++++-
2 files changed, 30 insertions(+), 1 deletion(-)
diff --git a/src/android/camera_stream.cpp b/src/android/camera_stream.cpp
index 59b1df6e..bdcc7cf9 100644
--- a/src/android/camera_stream.cpp
+++ b/src/android/camera_stream.cpp
@@ -81,6 +81,8 @@ int CameraStream::configure()
int ret = postProcessor_->configure(configuration(), output);
if (ret)
return ret;
+
+ postProcessor_->processComplete.connect(this, &CameraStream::handlePostProcessing);
}
if (allocator_) {
@@ -119,6 +121,21 @@ int CameraStream::process(const libcamera::FrameBuffer *source,
return postProcessor_->process(source, &dest, requestMetadata, resultMetadata);
}
+void CameraStream::handlePostProcessing(PostProcessor::Status status,
+ CameraMetadata *resultMetadata)
+{
+ switch (status) {
+ case PostProcessor::Status::Success:
+ processComplete.emit(this, ProcessStatus::Success, resultMetadata);
+ break;
+ case PostProcessor::Status::Failed:
+ processComplete.emit(this, ProcessStatus::Failed, resultMetadata);
+ break;
+ default:
+ LOG(HAL, Error) << "PostProcessor status invalid";
+ }
+}
+
FrameBuffer *CameraStream::getBuffer()
{
if (!allocator_)
diff --git a/src/android/camera_stream.h b/src/android/camera_stream.h
index 5c232cb6..d54d3f58 100644
--- a/src/android/camera_stream.h
+++ b/src/android/camera_stream.h
@@ -13,15 +13,18 @@
#include <hardware/camera3.h>
+#include <libcamera/base/signal.h>
+
#include <libcamera/camera.h>
#include <libcamera/framebuffer.h>
#include <libcamera/framebuffer_allocator.h>
#include <libcamera/geometry.h>
#include <libcamera/pixel_format.h>
+#include "post_processor.h"
+
class CameraDevice;
class CameraMetadata;
-class PostProcessor;
class CameraStream
{
@@ -125,7 +128,16 @@ public:
libcamera::FrameBuffer *getBuffer();
void putBuffer(libcamera::FrameBuffer *buffer);
+ enum ProcessStatus {
+ Failed,
+ Success,
+ };
+ libcamera::Signal<CameraStream *, ProcessStatus, CameraMetadata *> processComplete;
+
private:
+ void handlePostProcessing(PostProcessor::Status status,
+ CameraMetadata *resultMetadata);
+
CameraDevice *const cameraDevice_;
const libcamera::CameraConfiguration *config_;
const Type type_;
--
2.31.1
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