[libcamera-devel] [PATCH 3/4] android: camera_device: Provide a toPixelFormat helper

[Kieran Bingham]

Rather than converting pixelformats through the map, and then
dereferencing the iterator later, create a helper to explicitly return a
PixelFormat type.

Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
---
 src/android/camera_device.cpp | 29 +++++++++++++++++++++--------
 src/android/camera_device.h   |  1 +
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp
index f788c11e7254..a6410f42fee8 100644
--- a/src/android/camera_device.cpp
+++ b/src/android/camera_device.cpp
@@ -923,6 +923,20 @@ const camera_metadata_t *CameraDevice::constructDefaultRequestSettings(int type)
 	return requestTemplate->get();
 }
 
+PixelFormat CameraDevice::toPixelFormat(int format)
+{
+	/* Translate Android format code to libcamera pixel format. */
+	auto it = formatsMap_.find(format);
+	if (it == formatsMap_.end()) {
+		LOG(HAL, Error) << "Requested format "
+				<< utils::hex(format)
+				<< " not supported";
+		return PixelFormat();
+	}
+
+	return it->second;
+}
+
 /*
  * Inspect the stream_list to produce a list of StreamConfiguration to
  * be use to configure the Camera.
@@ -932,11 +946,14 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list)
 	for (unsigned int i = 0; i < stream_list->num_streams; ++i) {
 		camera3_stream_t *stream = stream_list->streams[i];
 
+		PixelFormat format = toPixelFormat(stream->format);
+
 		LOG(HAL, Info) << "Stream #" << i
 			       << ", direction: " << stream->stream_type
 			       << ", width: " << stream->width
 			       << ", height: " << stream->height
-			       << ", format: " << utils::hex(stream->format);
+			       << ", format: " << utils::hex(stream->format)
+			       << " (" << format.toString() << ")";
 	}
 
 	/* Only one stream is supported. */
@@ -947,13 +964,9 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list)
 	camera3_stream_t *camera3Stream = stream_list->streams[0];
 
 	/* Translate Android format code to libcamera pixel format. */
-	auto it = formatsMap_.find(camera3Stream->format);
-	if (it == formatsMap_.end()) {
-		LOG(HAL, Error) << "Requested format "
-				<< utils::hex(camera3Stream->format)
-				<< " not supported";
+	PixelFormat format = toPixelFormat(camera3Stream->format);
+	if (!format.isValid())
 		return -EINVAL;
-	}
 
 	/*
 	 * Hardcode viewfinder role, replacing the generated configuration
@@ -969,7 +982,7 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list)
 	StreamConfiguration *streamConfiguration = &config_->at(0);
 	streamConfiguration->size.width = camera3Stream->width;
 	streamConfiguration->size.height = camera3Stream->height;
-	streamConfiguration->pixelFormat = it->second;
+	streamConfiguration->pixelFormat = format;
 
 	switch (config_->validate()) {
 	case CameraConfiguration::Valid:
diff --git a/src/android/camera_device.h b/src/android/camera_device.h
index ed11410a5577..5bd6cf416156 100644
--- a/src/android/camera_device.h
+++ b/src/android/camera_device.h
@@ -72,6 +72,7 @@ private:
 	std::tuple<uint32_t, uint32_t> calculateStaticMetadataSize();
 	void notifyShutter(uint32_t frameNumber, uint64_t timestamp);
 	void notifyError(uint32_t frameNumber, camera3_stream_t *stream);
+	libcamera::PixelFormat toPixelFormat(int format);
 	std::unique_ptr<CameraMetadata> getResultMetadata(int frame_number,
 							  int64_t timestamp);
 
-- 
2.25.1