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videometa: add copy functions

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Without copy functions, the metadata is lost when we make a buffer copy such as
when we make a buffer writable.
This commit is contained in:
Wim Taymans 2011-12-01 15:45:28 +01:00
parent e064f9dbf6
commit 92ac25bdb3
1 changed files with 43 additions and 2 deletions
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45
gst-libs/gst/video/gstvideometa.c
View file

@ -19,6 +19,32 @@
#include "gstvideometa.h"
static void
gst_video_meta_copy (GstBuffer * dest, GstMeta * meta,
GstBuffer * buffer, gsize offset, gsize size)
{
GstVideoMeta *dmeta, *smeta;
guint i;
smeta = (GstVideoMeta *) meta;
dmeta =
(GstVideoMeta *) gst_buffer_add_meta (dest, GST_VIDEO_META_INFO, NULL);
dmeta->buffer = dest;
dmeta->flags = smeta->flags;
dmeta->id = smeta->id;
dmeta->format = smeta->format;
dmeta->width = smeta->width;
dmeta->height = smeta->height;
dmeta->n_planes = smeta->n_planes;
for (i = 0; i < dmeta->n_planes; i++) {
dmeta->offset[i] = smeta->offset[i];
dmeta->stride[i] = smeta->stride[i];
}
}
/* video metadata */
const GstMetaInfo *
gst_video_meta_get_info (void)
@ -30,7 +56,7 @@ gst_video_meta_get_info (void)
sizeof (GstVideoMeta),
(GstMetaInitFunction) NULL,
(GstMetaFreeFunction) NULL,
(GstMetaCopyFunction) NULL, (GstMetaTransformFunction) NULL);
gst_video_meta_copy, (GstMetaTransformFunction) NULL);
}
return video_meta_info;
}
@ -238,6 +264,21 @@ gst_video_meta_unmap (GstVideoMeta * meta, guint plane, gpointer data)
return TRUE;
}
static void
gst_video_crop_meta_copy (GstBuffer * dest, GstMeta * meta,
GstBuffer * buffer, gsize offset, gsize size)
{
GstVideoCropMeta *dmeta, *smeta;
smeta = (GstVideoCropMeta *) meta;
dmeta = gst_buffer_add_video_crop_meta (dest);
dmeta->x = smeta->x;
dmeta->y = smeta->y;
dmeta->width = smeta->width;
dmeta->height = smeta->height;
}
const GstMetaInfo *
gst_video_crop_meta_get_info (void)
{
@ -247,7 +288,7 @@ gst_video_crop_meta_get_info (void)
video_crop_meta_info =
gst_meta_register (GST_VIDEO_CROP_META_API, "GstVideoCropMeta",
sizeof (GstVideoCropMeta), (GstMetaInitFunction) NULL,
(GstMetaFreeFunction) NULL, (GstMetaCopyFunction) NULL,
(GstMetaFreeFunction) NULL, gst_video_crop_meta_copy,
(GstMetaTransformFunction) NULL);
}
return video_crop_meta_info;