[libcamera-devel] [PATCH v4 08/11] android: camera_buffer: Add method to get the JPEG blob size
Jacopo Mondi
jacopo at jmondi.org
Tue Mar 2 15:18:41 CET 2021
To maintain compatibility with platforms that do not provide a memory
backend implementation add a method to be return the size of the buffer
used for JPEG encoding capped to a maximum size.
Platforms that implement a memory backend will always calculate the
correct buffer size.
Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
---
src/android/camera_buffer.h | 2 ++
src/android/mm/generic_camera_buffer.cpp | 14 ++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/src/android/camera_buffer.h b/src/android/camera_buffer.h
index 2311cdaf96b2..784fbd50e50b 100644
--- a/src/android/camera_buffer.h
+++ b/src/android/camera_buffer.h
@@ -26,6 +26,8 @@ public:
libcamera::Span<const uint8_t> plane(unsigned int plane) const;
libcamera::Span<uint8_t> plane(unsigned int plane);
+
+ size_t jpegBufferSize(size_t maxJpegBufferSize) const;
};
#endif /* __ANDROID_CAMERA_BUFFER_H__ */
diff --git a/src/android/mm/generic_camera_buffer.cpp b/src/android/mm/generic_camera_buffer.cpp
index 45a83c351266..98e63dfa0577 100644
--- a/src/android/mm/generic_camera_buffer.cpp
+++ b/src/android/mm/generic_camera_buffer.cpp
@@ -27,6 +27,8 @@ public:
unsigned int numPlanes() const;
Span<uint8_t> plane(unsigned int plane);
+
+ size_t jpegBufferSize(size_t maxJpegBufferSize) const;
};
CameraBuffer::Private::Private(CameraBuffer *cameraBuffer,
@@ -77,6 +79,12 @@ Span<uint8_t> CameraBuffer::Private::plane(unsigned int plane)
return maps_[plane];
}
+size_t CameraBuffer::Private::jpegBufferSize(size_t maxJpegBufferSize) const
+{
+ return std::min<unsigned int>(maps_[0].size(),
+ maxJpegBufferSize);
+}
+
CameraBuffer::CameraBuffer(buffer_handle_t camera3Buffer, int flags)
: Extensible(new Private(this, camera3Buffer, flags))
{
@@ -109,3 +117,9 @@ Span<uint8_t> CameraBuffer::plane(unsigned int plane)
Private *const d = LIBCAMERA_D_PTR();
return d->plane(plane);
}
+
+size_t CameraBuffer::jpegBufferSize(size_t maxJpegBufferSize) const
+{
+ const Private *const d = LIBCAMERA_D_PTR();
+ return d->jpegBufferSize(maxJpegBufferSize);
+}
--
2.30.0
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