diff options
| -rw-r--r-- | drivers/media/mc/mc-entity.c | 18 | ||||
| -rw-r--r-- | include/media/media-entity.h | 29 |
2 files changed, 47 insertions, 0 deletions
diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c index 6ec2092d7f80..83797d6b1753 100644 --- a/drivers/media/mc/mc-entity.c +++ b/drivers/media/mc/mc-entity.c @@ -945,6 +945,24 @@ out: } 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 */ diff --git a/include/media/media-entity.h b/include/media/media-entity.h index 47863e8fde7b..11351579a4d2 100644 --- a/include/media/media-entity.h +++ b/include/media/media-entity.h @@ -131,6 +131,15 @@ struct media_pipeline_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. * * @graph_obj: Embedded structure containing the media object common data @@ -1165,6 +1174,26 @@ void media_pipeline_stop(struct media_pad *pad); */ 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 |