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videoscale: scale each field in interlace mode

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When we are dealing with interlaced content, scale each field intependently so
that we don't destroy the interlacing.

See https://bugzilla.gnome.org/show_bug.cgi?id=588535
This commit is contained in:
Wim Taymans 2013-02-05 10:46:50 +01:00
parent be866d4b78
commit 0085a77919
1 changed files with 48 additions and 11 deletions
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59
gst/videoscale/gstvideoscale.c
View file

@ -203,6 +203,9 @@ static void gst_video_scale_set_property (GObject * object, guint prop_id,
static void gst_video_scale_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstFlowReturn do_scale (GstVideoFilter * filter, VSImage dest[4],
VSImage src[4]);
#define gst_video_scale_parent_class parent_class
G_DEFINE_TYPE (GstVideoScale, gst_video_scale, GST_TYPE_VIDEO_FILTER);
@ -1002,7 +1005,7 @@ done:
static void
gst_video_scale_setup_vs_image (VSImage * image, GstVideoFrame * frame,
gint component, gint b_w, gint b_h)
gint component, gint b_w, gint b_h, gboolean interlaced, gint field)
{
GstVideoFormat format;
gint width, height;
@ -1018,6 +1021,11 @@ gst_video_scale_setup_vs_image (VSImage * image, GstVideoFrame * frame,
image->height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (frame->info.finfo,
component, MAX (1, height - b_h));
if (interlaced) {
image->real_height /= 2;
image->height /= 2;
}
image->border_top = (image->real_height - image->height) / 2;
image->border_bottom = image->real_height - image->height - image->border_top;
@ -1035,12 +1043,19 @@ gst_video_scale_setup_vs_image (VSImage * image, GstVideoFrame * frame,
image->border_right = image->real_width - image->width - image->border_left;
}
image->real_pixels = frame->data[component];
image->stride = frame->info.stride[component];
image->real_pixels = GST_VIDEO_FRAME_PLANE_DATA (frame, component);
image->stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, component);
if (interlaced) {
if (field == 1)
image->real_pixels += image->stride;
image->stride *= 2;
}
image->pixels =
image->real_pixels + image->border_top * image->stride +
image->border_left * GST_VIDEO_FRAME_COMP_PSTRIDE (frame, component);
}
static const guint8 *
@ -1111,11 +1126,39 @@ gst_video_scale_transform_frame (GstVideoFilter * filter,
GstFlowReturn ret = GST_FLOW_OK;
VSImage dest[4] = { {NULL,}, };
VSImage src[4] = { {NULL,}, };
gint i;
gboolean interlaced;
interlaced = GST_VIDEO_FRAME_IS_INTERLACED (in_frame);
for (i = 0; i < GST_VIDEO_FRAME_N_PLANES (in_frame); i++) {
gst_video_scale_setup_vs_image (&src[i], in_frame, i, 0, 0, interlaced, 0);
gst_video_scale_setup_vs_image (&dest[i], out_frame, i,
videoscale->borders_w, videoscale->borders_h, interlaced, 0);
}
ret = do_scale (filter, dest, src);
if (interlaced) {
for (i = 0; i < GST_VIDEO_FRAME_N_PLANES (in_frame); i++) {
gst_video_scale_setup_vs_image (&src[i], in_frame, i, 0, 0, interlaced,
1);
gst_video_scale_setup_vs_image (&dest[i], out_frame, i,
videoscale->borders_w, videoscale->borders_h, interlaced, 1);
}
ret = do_scale (filter, dest, src);
}
return ret;
}
static GstFlowReturn
do_scale (GstVideoFilter * filter, VSImage dest[4], VSImage src[4])
{
GstVideoScale *videoscale = GST_VIDEO_SCALE (filter);
GstFlowReturn ret = GST_FLOW_OK;
gint method;
const guint8 *black;
gboolean add_borders;
GstVideoFormat format;
gint i;
gboolean add_borders;
GST_OBJECT_LOCK (videoscale);
method = videoscale->method;
@ -1133,12 +1176,6 @@ gst_video_scale_transform_frame (GstVideoFilter * filter,
method = GST_VIDEO_SCALE_BILINEAR;
}
for (i = 0; i < GST_VIDEO_FRAME_N_PLANES (in_frame); i++) {
gst_video_scale_setup_vs_image (&src[i], in_frame, i, 0, 0);
gst_video_scale_setup_vs_image (&dest[i], out_frame, i,
videoscale->borders_w, videoscale->borders_h);
}
GST_CAT_DEBUG_OBJECT (GST_CAT_PERFORMANCE, filter,
"doing videoscale format %s", GST_VIDEO_INFO_NAME (&filter->in_info));