libcamera: Switch to FrameBuffer interface

Switch to the FrameBuffer interface where all buffers are treated as
external buffers and are allocated outside the camera. Applications
allocating buffers using libcamera are switched to use the
FrameBufferAllocator helper.

Follow-up changes to this one will finalize the transition to the new
FrameBuffer interface by removing code that is left unused after this
change.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/src/cam/buffer_writer.cpp b/src/cam/buffer_writer.cpp
index 41ef4b0a..1d7366c8 100644
--- a/src/cam/buffer_writer.cpp
+++ b/src/cam/buffer_writer.cpp
@@ -22,7 +22,7 @@ BufferWriter::BufferWriter(const std::string &pattern)
 {
 }
 
-int BufferWriter::write(Buffer *buffer, const std::string &streamName)
+int BufferWriter::write(FrameBuffer *buffer, const std::string &streamName)
 {
 	std::string filename;
 	size_t pos;
@@ -43,8 +43,7 @@ int BufferWriter::write(Buffer *buffer, const std::string &streamName)
 	if (fd == -1)
 		return -errno;
 
-	BufferMemory *mem = buffer->mem();
-	for (const FrameBuffer::Plane &plane : mem->planes()) {
+	for (const FrameBuffer::Plane &plane : buffer->planes()) {
 		/* \todo Once the FrameBuffer is done cache mapped memory. */
 		void *data = mmap(NULL, plane.length, PROT_READ, MAP_SHARED,
 				  plane.fd.fd(), 0);