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videoscale: Add helper method for filling the VSImage struct

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This commit is contained in:
Sebastian Dröge 2010-07-16 19:06:40 +02:00
parent 75f41ff8c8
commit 9fe51a4a50
1 changed files with 19 additions and 54 deletions
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73
gst/videoscale/gstvideoscale.c
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@ -313,6 +313,17 @@ gst_video_scale_transform_caps (GstBaseTransform * trans,
return ret;
}
static void
gst_video_scale_setup_vs_image (VSImage * image, GstVideoFormat format,
gint component, gint width, gint height)
{
image->width =
gst_video_format_get_component_width (format, component, width);
image->height =
gst_video_format_get_component_height (format, component, height);
image->stride = gst_video_format_get_row_stride (format, component, width);
}
static gboolean
gst_video_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
{
@ -337,29 +348,13 @@ gst_video_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
videoscale->dest_size = gst_video_format_get_size (videoscale->format,
videoscale->to_width, videoscale->to_height);
videoscale->src.width =
gst_video_format_get_component_width (videoscale->format, 0,
videoscale->from_width);
videoscale->src.height =
gst_video_format_get_component_height (videoscale->format, 0,
videoscale->from_height);
videoscale->src.stride =
gst_video_format_get_row_stride (videoscale->format, 0,
videoscale->from_width);
videoscale->dest.width =
gst_video_format_get_component_width (videoscale->format, 0,
videoscale->to_width);
videoscale->dest.height =
gst_video_format_get_component_height (videoscale->format, 0,
videoscale->to_height);
videoscale->dest.stride =
gst_video_format_get_row_stride (videoscale->format, 0,
videoscale->to_width);
gst_video_scale_setup_vs_image (&videoscale->src, videoscale->format, 0,
videoscale->from_width, videoscale->from_height);
gst_video_scale_setup_vs_image (&videoscale->dest, videoscale->format, 0,
videoscale->to_width, videoscale->to_height);
if (videoscale->tmp_buf)
g_free (videoscale->tmp_buf);
videoscale->tmp_buf =
g_malloc (videoscale->dest.stride * 4 * (videoscale->interlaced ? 2 : 1));
@ -832,22 +827,16 @@ gst_video_scale_prepare_image (gint format, GstBuffer * buf,
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_Y42B:
case GST_VIDEO_FORMAT_Y41B:
gst_video_scale_setup_vs_image (img_u, format, 1, img->width,
img->height);
gst_video_scale_setup_vs_image (img_v, format, 2, img->width,
img->height);
img_u->pixels =
GST_BUFFER_DATA (buf) + gst_video_format_get_component_offset (format,
1, img->width, img->height);
img_v->pixels =
GST_BUFFER_DATA (buf) + gst_video_format_get_component_offset (format,
2, img->width, img->height);
img_u->height =
gst_video_format_get_component_height (format, 1, img->height);
img_v->height =
gst_video_format_get_component_height (format, 2, img->height);
img_u->width =
gst_video_format_get_component_width (format, 1, img->width);
img_v->width =
gst_video_format_get_component_width (format, 2, img->width);
img_u->stride = gst_video_format_get_row_stride (format, 1, img->width);
img_v->stride = gst_video_format_get_row_stride (format, 2, img->width);
if (interlaced && step == 1) {
img_v->pixels += img_v->stride;
@ -864,30 +853,6 @@ gst_video_scale_prepare_image (gint format, GstBuffer * buf,
}
break;
img_u->pixels =
GST_BUFFER_DATA (buf) + GST_ROUND_UP_4 (img->width) * img->height;
img_u->height = img->height;
img_u->width = GST_ROUND_UP_2 (img->width) / 2;
img_u->stride = GST_ROUND_UP_8 (img->width) / 2;
memcpy (img_v, img_u, sizeof (*img_v));
img_v->pixels =
GST_BUFFER_DATA (buf) + (GST_ROUND_UP_4 (img->width) +
(GST_ROUND_UP_8 (img->width) / 2)) * img->height;
if (interlaced && step == 1) {
img_v->pixels += img_v->stride;
img_u->pixels += img_u->stride;
}
if (interlaced) {
img_u->height = (img_u->height / 2) + ((step == 0
&& img_u->height % 2 == 1) ? 1 : 0);
img_u->stride *= 2;
img_v->height = (img_v->height / 2) + ((step == 0
&& img_v->height % 2 == 1) ? 1 : 0);
img_v->stride *= 2;
}
break;
default:
break;
}