}
EXPORT_SYMBOL_GPL(media_pipeline_alloc_start);
+struct media_pad *
+__media_pipeline_pad_iter_next(struct media_pipeline *pipe,
+ struct media_pipeline_pad_iter *iter,
+ struct media_pad *pad)
+{
+ if (!pad)
+ iter->cursor = pipe->pads.next;
+
+ if (iter->cursor == &pipe->pads)
+ return NULL;
+
+ pad = list_entry(iter->cursor, struct media_pipeline_pad, list)->pad;
+ iter->cursor = iter->cursor->next;
+
+ return pad;
+}
+EXPORT_SYMBOL_GPL(__media_pipeline_pad_iter_next);
+
/* -----------------------------------------------------------------------------
* Links management
*/
struct media_pad *pad;
};
+/**
+ * struct media_pipeline_pad_iter - Iterator for media_pipeline_for_each_pad
+ *
+ * @cursor: The current element
+ */
+struct media_pipeline_pad_iter {
+ struct list_head *cursor;
+};
+
/**
* struct media_link - A link object part of a media graph.
*
*/
void __media_pipeline_stop(struct media_pad *pad);
+struct media_pad *
+__media_pipeline_pad_iter_next(struct media_pipeline *pipe,
+ struct media_pipeline_pad_iter *iter,
+ struct media_pad *pad);
+
+/**
+ * media_pipeline_for_each_pad - Iterate on all pads in a media pipeline
+ * @pipe: The pipeline
+ * @iter: The iterator (struct media_pipeline_pad_iter)
+ * @pad: The iterator pad
+ *
+ * Iterate on all pads in a media pipeline. This is only valid after the
+ * pipeline has been built with media_pipeline_start() and before it gets
+ * destroyed with media_pipeline_stop().
+ */
+#define media_pipeline_for_each_pad(pipe, iter, pad) \
+ for (pad = __media_pipeline_pad_iter_next((pipe), iter, NULL); \
+ pad != NULL; \
+ pad = __media_pipeline_pad_iter_next((pipe), iter, pad))
+
/**
* media_pipeline_alloc_start - Mark a pipeline as streaming
* @pad: Starting pad