cam: Allow specifying directories in the --file option

The value of the --file option is the full name of the file to which
captured frames are written. To write files to a specific directory with
the default naming scheme, the "frame-#.bin" name has to appear at the
end of the file name. Simplify usage of the option by allowing --file to
specify a directory only. If the file name ends with a '/', the default
"frame-#.bin" file name is automatically appended.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/cam/buffer_writer.cpp b/src/cam/buffer_writer.cpp
index f2b21aef..a7648a92 100644
--- a/src/cam/buffer_writer.cpp
+++ b/src/cam/buffer_writer.cpp
@@ -49,7 +49,12 @@ int BufferWriter::write(FrameBuffer *buffer, const std::string &streamName)
 	size_t pos;
 	int fd, ret = 0;
 
-	filename = pattern_;
+	if (!pattern_.empty())
+		filename = pattern_;
+
+	if (filename.empty() || filename.back() == '/')
+		filename += "frame-#.bin";
+
 	pos = filename.find_first_of('#');
 	if (pos != std::string::npos) {
 		std::stringstream ss;