libcamera: request: Expose the Stream to Buffers map

Add to the Request class a method to access the map of Stream to Buffer.

With the introduction of multiple stream support, pipeline handler
should be able to access the map of streams at request queueing time.

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

2 files changed, 11 insertions, 0 deletions

diff --git a/include/libcamera/request.h b/include/libcamera/request.h
index 0188bcab..58de6f00 100644
--- a/include/libcamera/request.h
+++ b/include/libcamera/request.h
@@ -32,6 +32,7 @@ public:
 	Request(const Request &) = delete;
 	Request &operator=(const Request &) = delete;
 
+	const std::map<Stream *, Buffer *> &buffers() const { return bufferMap_; }
 	int setBuffers(const std::map<Stream *, Buffer *> &streamMap);
 	Buffer *findBuffer(Stream *stream) const;
 
diff --git a/src/libcamera/request.cpp b/src/libcamera/request.cpp
index 95818a26..7088a479 100644
--- a/src/libcamera/request.cpp
+++ b/src/libcamera/request.cpp
@@ -52,6 +52,16 @@ Request::Request(Camera *camera)
 }
 
 /**
+ * \fn Request::buffers()
+ * \brief Retrieve the request's streams to buffers map
+ *
+ * Return a reference to the map that associates each Stream part of the
+ * request to the Buffer the Stream output should be directed to.
+ *
+ * \return The map of Stream to Buffer
+ */
+
+/**
  * \brief Set the streams to capture with associated buffers
  * \param[in] streamMap The map of streams to buffers
  * \return 0 on success or a negative error code otherwise