diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2022-12-21 10:33:37 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-02-06 08:31:51 +0100 |
| commit | d10ac51e8a047e613bee8309739d122e48e00bcb (patch) | |
| tree | 3d8ae0b5bb3db7aa45f90562fdfa1fcb4cf2bcc4 /include/media/media-entity.h | |
| parent | d7ff69139908842adf824be4f50c7e9ac5886c04 (diff) | |
media: mc: entity: Add pad iterator for media_pipeline
Add a media_pipeline_for_each_pad() macro to iterate over pads in a
pipeline. This should be used by driver as a replacement of the
media_graph_walk API, as iterating over the media_pipeline uses the
cached list of pads and is thus more efficient.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'include/media/media-entity.h')
| -rw-r--r-- | include/media/media-entity.h | 29 |
1 files changed, 29 insertions, 0 deletions
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 |