[libcamera-devel] [PATCH v3 2/4] android: Modify Encoder interface

[Hirokazu Honda]

In Encoder::encode(), the |source| argument doesn't have to be a
pointer. This replaces its type, const pointer, with const
reference as the latter is preferred to the former.
libcamera::Span is cheap to construct/copy/move. We should deal
with the type as pass-by-value parameter. Therefore this also
drops the const reference in the |destination| argument.

Signed-off-by: Hirokazu Honda <hiroh at chromium.org>
Reviewed-by: Umang Jain <email at uajain.com>
Reviewed-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 src/android/jpeg/encoder.h               | 4 ++--
 src/android/jpeg/encoder_libjpeg.cpp     | 6 +++---
 src/android/jpeg/encoder_libjpeg.h       | 4 ++--
 src/android/jpeg/post_processor_jpeg.cpp | 2 +-
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/android/jpeg/encoder.h b/src/android/jpeg/encoder.h
index 4e85996..270ea60 100644
--- a/src/android/jpeg/encoder.h
+++ b/src/android/jpeg/encoder.h
@@ -17,8 +17,8 @@ public:
 	virtual ~Encoder() {}
 
 	virtual int configure(const libcamera::StreamConfiguration &cfg) = 0;
-	virtual int encode(const libcamera::FrameBuffer *source,
-			   const libcamera::Span<uint8_t> &destination,
+	virtual int encode(const libcamera::FrameBuffer &source,
+			   libcamera::Span<uint8_t> destination,
 			   const libcamera::Span<const uint8_t> &exifData) = 0;
 };
 
diff --git a/src/android/jpeg/encoder_libjpeg.cpp b/src/android/jpeg/encoder_libjpeg.cpp
index f11e004..5a2f88f 100644
--- a/src/android/jpeg/encoder_libjpeg.cpp
+++ b/src/android/jpeg/encoder_libjpeg.cpp
@@ -179,11 +179,11 @@ void EncoderLibJpeg::compressNV(const libcamera::MappedBuffer *frame)
 	}
 }
 
-int EncoderLibJpeg::encode(const FrameBuffer *source,
-			   const libcamera::Span<uint8_t> &dest,
+int EncoderLibJpeg::encode(const FrameBuffer &source,
+			   libcamera::Span<uint8_t> dest,
 			   const libcamera::Span<const uint8_t> &exifData)
 {
-	MappedFrameBuffer frame(source, PROT_READ);
+	MappedFrameBuffer frame(&source, PROT_READ);
 	if (!frame.isValid()) {
 		LOG(JPEG, Error) << "Failed to map FrameBuffer : "
 				 << strerror(frame.error());
diff --git a/src/android/jpeg/encoder_libjpeg.h b/src/android/jpeg/encoder_libjpeg.h
index 934caef..391a53c 100644
--- a/src/android/jpeg/encoder_libjpeg.h
+++ b/src/android/jpeg/encoder_libjpeg.h
@@ -21,8 +21,8 @@ public:
 	~EncoderLibJpeg();
 
 	int configure(const libcamera::StreamConfiguration &cfg) override;
-	int encode(const libcamera::FrameBuffer *source,
-		   const libcamera::Span<uint8_t> &destination,
+	int encode(const libcamera::FrameBuffer &source,
+		   libcamera::Span<uint8_t> destination,
 		   const libcamera::Span<const uint8_t> &exifData) override;
 
 private:
diff --git a/src/android/jpeg/post_processor_jpeg.cpp b/src/android/jpeg/post_processor_jpeg.cpp
index 90bf10d..8b01bd6 100644
--- a/src/android/jpeg/post_processor_jpeg.cpp
+++ b/src/android/jpeg/post_processor_jpeg.cpp
@@ -67,7 +67,7 @@ int PostProcessorJpeg::process(const libcamera::FrameBuffer &source,
 	if (exif.generate() != 0)
 		LOG(JPEG, Error) << "Failed to generate valid EXIF data";
 
-	int jpeg_size = encoder_->encode(&source, destination, exif.data());
+	int jpeg_size = encoder_->encode(source, destination, exif.data());
 	if (jpeg_size < 0) {
 		LOG(JPEG, Error) << "Failed to encode stream image";
 		return jpeg_size;
-- 
2.29.0.rc1.297.gfa9743e501-goog