[libcamera-devel] [PATCH v3 5/8] libcamera: request: Add streams() method

[Jacopo Mondi]

Add a method to retrieve the list of streams contained in a requests.

This is useful for pipeline handler willing to cycle on all the streams
a request contains at queueRequest() time.

Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
---
 include/libcamera/request.h |  3 +++
 src/libcamera/request.cpp   | 15 +++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/libcamera/request.h b/include/libcamera/request.h
index 0dbd425115e8..5ac4d20d1d9f 100644
--- a/include/libcamera/request.h
+++ b/include/libcamera/request.h
@@ -7,6 +7,7 @@
 #ifndef __LIBCAMERA_REQUEST_H__
 #define __LIBCAMERA_REQUEST_H__
 
+#include <list>
 #include <map>
 #include <unordered_set>
 
@@ -35,6 +36,8 @@ public:
 	int setBuffers(const std::map<Stream *, Buffer *> &streamMap);
 	Buffer *findBuffer(Stream *stream) const;
 
+	const std::list<Stream *> streams() const;
+
 	Status status() const { return status_; }
 
 private:
diff --git a/src/libcamera/request.cpp b/src/libcamera/request.cpp
index e0e77e972411..3a7841fb2bb3 100644
--- a/src/libcamera/request.cpp
+++ b/src/libcamera/request.cpp
@@ -93,6 +93,21 @@ Buffer *Request::findBuffer(Stream *stream) const
 	return it->second;
 }
 
+/**
+ * \brief Retrieve the set of streams contained in the request
+ *
+ * \return The set of streams contained in the request
+ */
+const std::list<Stream *> Request::streams() const
+{
+	std::list<Stream *> streams = {};
+
+	for (auto const &it : bufferMap_)
+		streams.push_front(it.first);
+
+	return streams;
+}
+
 /**
  * \fn Request::status()
  * \brief Retrieve the request completion status
-- 
2.21.0