libcamera: stream: Construct a stream

Construct a stream object with a default internal pool.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

include/libcamera/stream.h

@@ -7,10 +7,18 @@
 #ifndef __LIBCAMERA_STREAM_H__
 #define __LIBCAMERA_STREAM_H__
 
+#include <libcamera/buffer.h>
+
 namespace libcamera {
 
 class Stream final
 {
+public:
+	Stream();
+	BufferPool &bufferPool() { return bufferPool_; }
+
+private:
+	BufferPool bufferPool_;
 };
 
 struct StreamConfiguration {

src/libcamera/stream.cpp

@@ -47,6 +47,24 @@ namespace libcamera {
  * optimal stream for the task.
  */
 
+/**
+ * \brief Construct a stream with default parameters
+ */
+Stream::Stream()
+{
+}
+
+/**
+ * \fn Stream::bufferPool()
+ * \brief Retrieve the buffer pool for the stream
+ *
+ * The buffer pool handles the buffers used to capture frames at the output of
+ * the stream. It is initially created empty and shall be populated with
+ * buffers before being used.
+ *
+ * \return A reference to the buffer pool
+ */
+
 /**
  * \struct StreamConfiguration
  * \brief Configuration parameters for a stream