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video: add function to copy one video plane

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This commit is contained in:
Wim Taymans 2012-03-19 12:26:11 +01:00
parent dfb8e7cb2c
commit e620dbc57d
2 changed files with 57 additions and 23 deletions
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78
gst-libs/gst/video/video.c
View file

@ -1129,6 +1129,56 @@ gst_video_frame_unmap (GstVideoFrame * frame)
}
}
/**
* gst_video_frame_copy:
* @dest: a #GstVideoFrame
* @src: a #GstVideoFrame
* @plane: a plane
*
* Copy the plane with index @plane from @src to @dest.
*
* Returns: TRUE if the contents could be copied.
*/
gboolean
gst_video_frame_copy_plane (GstVideoFrame * dest, const GstVideoFrame * src,
guint plane)
{
const GstVideoInfo *sinfo;
GstVideoInfo *dinfo;
guint w, h, j;
guint8 *sp, *dp;
gint ss, ds;
g_return_val_if_fail (dest != NULL, FALSE);
g_return_val_if_fail (src != NULL, FALSE);
sinfo = &src->info;
dinfo = &dest->info;
g_return_val_if_fail (dinfo->finfo->format == sinfo->finfo->format, FALSE);
g_return_val_if_fail (dinfo->width == sinfo->width
&& dinfo->height == sinfo->height, FALSE);
g_return_val_if_fail (dinfo->finfo->n_planes < plane, FALSE);
sp = src->data[plane];
dp = dest->data[plane];
ss = sinfo->stride[plane];
ds = dinfo->stride[plane];
w = MIN (ABS (ss), ABS (ds));
h = GST_VIDEO_FRAME_COMP_HEIGHT (dest, plane);
GST_CAT_DEBUG (GST_CAT_PERFORMANCE, "copy plane %d, w:%d h:%d ", plane, w, h);
for (j = 0; j < h; j++) {
memcpy (dp, sp, w);
dp += ds;
sp += ss;
}
return TRUE;
}
/**
* gst_video_frame_copy:
* @dest: a #GstVideoFrame
@ -1145,6 +1195,9 @@ gst_video_frame_copy (GstVideoFrame * dest, const GstVideoFrame * src)
const GstVideoInfo *sinfo;
GstVideoInfo *dinfo;
g_return_val_if_fail (dest != NULL, FALSE);
g_return_val_if_fail (src != NULL, FALSE);
sinfo = &src->info;
dinfo = &dest->info;
@ -1154,30 +1207,9 @@ gst_video_frame_copy (GstVideoFrame * dest, const GstVideoFrame * src)
n_planes = dinfo->finfo->n_planes;
GST_CAT_DEBUG (GST_CAT_PERFORMANCE, "doing video frame copy");
for (i = 0; i < n_planes; i++)
gst_video_frame_copy_plane (dest, src, i);
for (i = 0; i < n_planes; i++) {
guint w, h, j;
guint8 *sp, *dp;
gint ss, ds;
sp = src->data[i];
dp = dest->data[i];
ss = sinfo->stride[i];
ds = dinfo->stride[i];
w = MIN (ABS (ss), ABS (ds));
h = GST_VIDEO_FRAME_COMP_HEIGHT (dest, i);
GST_DEBUG ("w %d h %d", w, h);
for (j = 0; j < h; j++) {
memcpy (dp, sp, w);
dp += ds;
sp += ss;
}
}
return TRUE;
}

2
gst-libs/gst/video/video.h
View file

@ -632,6 +632,8 @@ gboolean gst_video_frame_map_id (GstVideoFrame *frame, GstVideoInfo *i
void gst_video_frame_unmap (GstVideoFrame *frame);
gboolean gst_video_frame_copy (GstVideoFrame *dest, const GstVideoFrame *src);
gboolean gst_video_frame_copy_plane (GstVideoFrame *dest, const GstVideoFrame *src,
guint plane);
/* general info */
#define GST_VIDEO_FRAME_FORMAT(f) (GST_VIDEO_INFO_FORMAT(&(f)->info))