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docs: update fields about gst video aligment

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1) add stride align fields in allocation.md
2) add stride align fields in gstvideometa.h

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7201>
This commit is contained in:
Qian Hu (胡骞) 2024-09-19 20:57:09 +08:00 committed by GStreamer Marge Bot
parent 6335c5d005
commit 53007b5d83
2 changed files with 14 additions and 2 deletions
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8
subprojects/gst-docs/markdown/plugin-development/advanced/allocation.md
View file

@ -693,6 +693,10 @@ params = gst_structure_new ("video-meta",
"padding-bottom", G_TYPE_UINT, align.padding_bottom,
"padding-left", G_TYPE_UINT, align.padding_left,
"padding-right", G_TYPE_UINT, align.padding_right,
"stride-align0", G_TYPE_UINT, align->stride_align[0],
"stride-align1", G_TYPE_UINT, align->stride_align[1],
"stride-align2", G_TYPE_UINT, align->stride_align[2],
"stride-align3", G_TYPE_UINT, align->stride_align[3],
NULL);
```
3. *v4l2h264enc*: when handling the `ALLOCATION` query (`propose_allocation()`),
@ -722,6 +726,10 @@ if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, &video_idx))
gst_structure_get_uint (s, "padding-bottom", &align.padding_bottom);
gst_structure_get_uint (s, "padding-left", &align.padding_left);
gst_structure_get_uint (s, "padding-right", &align.padding_right);
gst_structure_get_uint (s, "stride-align0", &align.stride_align[0]);
gst_structure_get_uint (s, "stride-align1", &align.stride_align[1]);
gst_structure_get_uint (s, "stride-align2", &align.stride_align[2]);
gst_structure_get_uint (s, "stride-align3", &align.stride_align[3]);
gst_video_info_from_caps (&info, caps);

8
subprojects/gst-plugins-base/gst-libs/gst/video/gstvideometa.h
View file

@ -72,8 +72,12 @@ typedef struct _GstVideoCropMeta GstVideoCropMeta;
* - padding-bottom (uint): extra pixels on the bottom
* - padding-left (uint): extra pixels on the left side
* - padding-right (uint): extra pixels on the right side
* The padding fields have the same semantic as #GstVideoMeta.alignment
* and so represent the paddings requested on produced video buffers.
* - stride-align0 (uint): stride align requirements for plane 0
* - stride-align1 (uint): stride align requirements for plane 1
* - stride-align2 (uint): stride align requirements for plane 2
* - stride-align3 (uint): stride align requirements for plane 3
* The padding and stride-align fields have the same semantic as #GstVideoMeta.alignment
* and so represent the paddings and stride-align requested on produced video buffers.
*
* Since 1.24 it can be serialized using gst_meta_serialize() and
* gst_meta_deserialize().