android: camera_stream: Construct with Android stream

Pass the android camera3_stream_t, and a libcamera::StreamConfiguration
to identify the source and destination parameters of this stream.

Pass a CameraDevice pointer to the CameraStream constructor to allow
retrieval of the StreamConfiguration associated with the CameraStream.

Also change the format on which the CameraDevice performs checks to
decide if post-processing is required, as the libcamera facing format is
not meaningful anymore, but the Android requested format should be used
instead.

Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

src/android/camera_device.cpp

@@ -1216,8 +1216,8 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list)
 
 		config_->addConfiguration(streamConfiguration);
 		unsigned int index = config_->size() - 1;
-		streams_.emplace_back(format, size, CameraStream::Type::Direct,
+		streams_.emplace_back(this, stream, streamConfiguration,
-				      index);
+				      CameraStream::Type::Direct, index);
 		stream->priv = static_cast<void *>(&streams_.back());
 	}
 
@@ -1272,8 +1272,7 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list)
 		}
 
 		StreamConfiguration &cfg = config_->at(index);
-
+		streams_.emplace_back(this, jpegStream, cfg, type, index);
-		streams_.emplace_back(formats::MJPEG, cfg.size, type, index);
 		jpegStream->priv = static_cast<void *>(&streams_.back());
 	}
 
@@ -1405,7 +1404,7 @@ int CameraDevice::processCaptureRequest(camera3_capture_request_t *camera3Reques
 		descriptor->buffers[i].buffer = camera3Buffers[i].buffer;
 
 		/* Software streams are handled after hardware streams complete. */
-		if (cameraStream->format() == formats::MJPEG)
+		if (cameraStream->camera3Stream().format == HAL_PIXEL_FORMAT_BLOB)
 			continue;
 
 		/*
@@ -1469,7 +1468,7 @@ void CameraDevice::requestComplete(Request *request)
 		CameraStream *cameraStream =
 			static_cast<CameraStream *>(descriptor->buffers[i].stream->priv);
 
-		if (cameraStream->format() != formats::MJPEG)
+		if (cameraStream->camera3Stream().format != HAL_PIXEL_FORMAT_BLOB)
 			continue;
 
 		Encoder *encoder = cameraStream->encoder();

src/android/camera_device.h

@@ -43,6 +43,10 @@ public:
 	unsigned int id() const { return id_; }
 	camera3_device_t *camera3Device() { return &camera3Device_; }
 	const libcamera::Camera *camera() const { return camera_.get(); }
+	libcamera::CameraConfiguration *cameraConfiguration() const
+	{
+		return config_.get();
+	}
 
 	int facing() const { return facing_; }
 	int orientation() const { return orientation_; }

src/android/camera_stream.cpp

@@ -7,14 +7,24 @@
 
 #include "camera_stream.h"
 
+#include "camera_device.h"
 #include "jpeg/encoder.h"
 #include "jpeg/encoder_libjpeg.h"
 
 using namespace libcamera;
 
-CameraStream::CameraStream(PixelFormat format, Size size, Type type, unsigned int index)
+CameraStream::CameraStream(CameraDevice *cameraDevice,
-	: format_(format), size_(size), type_(type), index_(index)
+			   camera3_stream_t *camera3Stream,
+			   const libcamera::StreamConfiguration &cfg,
+			   Type type, unsigned int index)
+	: cameraDevice_(cameraDevice), camera3Stream_(camera3Stream),
+	  type_(type), index_(index)
 {
+	config_ = cameraDevice_->cameraConfiguration();
+
+	format_ = cfg.pixelFormat;
+	size_ = cfg.size;
+
 	if (type_ == Type::Internal || type_ == Type::Mapped)
 		encoder_ = std::make_unique<EncoderLibJpeg>();
 }

src/android/camera_stream.h

@@ -9,9 +9,13 @@
 
 #include <memory>
 
+#include <hardware/camera3.h>
+
+#include <libcamera/camera.h>
 #include <libcamera/geometry.h>
 #include <libcamera/pixel_format.h>
 
+class CameraDevice;
 class Encoder;
 
 class CameraStream
@@ -99,9 +103,12 @@ public:
 		Internal,
 		Mapped,
 	};
-	CameraStream(libcamera::PixelFormat format, libcamera::Size size,
+	CameraStream(CameraDevice *cameraDevice,
+		     camera3_stream_t *androidStream,
+		     const libcamera::StreamConfiguration &cfg,
 		     Type type, unsigned int index);
 
+	const camera3_stream_t &camera3Stream() const { return *camera3Stream_; }
 	const libcamera::PixelFormat &format() const { return format_; }
 	const libcamera::Size &size() const { return size_; }
 	Type type() const { return type_; }
@@ -111,9 +118,15 @@ public:
 	int configure(const libcamera::StreamConfiguration &cfg);
 
 private:
+	CameraDevice *cameraDevice_;
+	libcamera::CameraConfiguration *config_;
+	camera3_stream_t *camera3Stream_;
+	Type type_;
+
+	/* Libcamera facing format and sizes. */
 	libcamera::PixelFormat format_;
 	libcamera::Size size_;
-	Type type_;
+
 	/*
 	 * The index of the libcamera StreamConfiguration as added during
 	 * configureStreams(). A single libcamera Stream may be used to deliver