From c89cfa534ba1d35e35de7d33c57a6c2906a5b11f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niklas=20S=C3=B6derlund?= <niklas.soderlund@ragnatech.se>
Date: Fri, 10 Jan 2020 18:41:30 +0100
Subject: cam: Cache buffer memory mapping
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

With the buffer allocator in use it's possible to cache the dmabuf
memory mappings when starting the camera instead of mapping and
unmapping them each time.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 src/cam/buffer_writer.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/cam/buffer_writer.h')

diff --git a/src/cam/buffer_writer.h b/src/cam/buffer_writer.h
index 5917a7df..8c9b2436 100644
--- a/src/cam/buffer_writer.h
+++ b/src/cam/buffer_writer.h
@@ -7,6 +7,7 @@
 #ifndef __LIBCAMERA_BUFFER_WRITER_H__
 #define __LIBCAMERA_BUFFER_WRITER_H__
 
+#include <map>
 #include <string>
 
 #include <libcamera/buffer.h>
@@ -15,12 +16,16 @@ class BufferWriter
 {
 public:
 	BufferWriter(const std::string &pattern = "frame-#.bin");
+	~BufferWriter();
+
+	void mapBuffer(libcamera::FrameBuffer *buffer);
 
 	int write(libcamera::FrameBuffer *buffer,
 		  const std::string &streamName);
 
 private:
 	std::string pattern_;
+	std::map<int, std::pair<void *, unsigned int>> mappedBuffers_;
 };
 
 #endif /* __LIBCAMERA_BUFFER_WRITER_H__ */
-- 
cgit v1.2.1