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vaapipostproc: add initial support for scaling.

Browse source 
Add initial support for basic scaling with size specified through the
"width" and "height" properties. If either user-provided dimension is
zero and "force-aspect-ratio" is set to true (the default), then the
other dimension is scaled to preserve the aspect ratio.
This commit is contained in:
Gwenole Beauchesne 2013-10-18 18:08:25 +02:00
parent cf69e7269c
commit e7544dc57e
2 changed files with 114 additions and 0 deletions
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111
gst/vaapi/gstvaapipostproc.c
View file

@ -134,6 +134,9 @@ enum {
PROP_0,
PROP_FORMAT,
PROP_WIDTH,
PROP_HEIGHT,
PROP_FORCE_ASPECT_RATIO,
PROP_DEINTERLACE_MODE,
PROP_DEINTERLACE_METHOD,
};
@ -611,6 +614,11 @@ gst_vaapipostproc_update_src_caps(GstVaapiPostproc *postproc, GstCaps *caps,
if (postproc->format != GST_VIDEO_INFO_FORMAT(&postproc->sinkpad_info))
postproc->flags |= GST_VAAPI_POSTPROC_FLAG_FORMAT;
if ((postproc->width || postproc->height) &&
postproc->width != GST_VIDEO_INFO_WIDTH(&postproc->sinkpad_info) &&
postproc->height != GST_VIDEO_INFO_HEIGHT(&postproc->sinkpad_info))
postproc->flags |= GST_VAAPI_POSTPROC_FLAG_SIZE;
return TRUE;
}
@ -743,6 +751,38 @@ ensure_allowed_srcpad_caps(GstVaapiPostproc *postproc)
return postproc->allowed_srcpad_caps != NULL;
}
static void
find_best_size(GstVaapiPostproc *postproc, GstVideoInfo *vip,
guint *width_ptr, guint *height_ptr)
{
guint width, height;
width = GST_VIDEO_INFO_WIDTH(vip);
height = GST_VIDEO_INFO_HEIGHT(vip);
if (postproc->width && postproc->height) {
width = postproc->width;
height = postproc->height;
}
else if (postproc->keep_aspect) {
const gdouble ratio = (gdouble)width / height;
if (postproc->width) {
width = postproc->width;
height = postproc->width / ratio;
}
else if (postproc->height) {
height = postproc->height;
width = postproc->height * ratio;
}
}
else if (postproc->width)
width = postproc->width;
else if (postproc->height)
height = postproc->height;
*width_ptr = width;
*height_ptr = height;
}
static GstCaps *
gst_vaapipostproc_transform_caps_impl(GstBaseTransform *trans,
GstPadDirection direction, GstCaps *caps)
@ -751,6 +791,7 @@ gst_vaapipostproc_transform_caps_impl(GstBaseTransform *trans,
GstVideoInfo vi;
GstVideoFormat format;
GstCaps *out_caps;
guint width, height;
gint fps_n, fps_d, par_n, par_d;
if (!gst_caps_is_fixed(caps)) {
@ -790,6 +831,9 @@ gst_vaapipostproc_transform_caps_impl(GstBaseTransform *trans,
/* Signal the other pad that we generate only progressive frames */
GST_VIDEO_INFO_INTERLACE_MODE(&vi) =
GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
find_best_size(postproc, &vi, &width, &height);
gst_video_info_set_format(&vi, format, width, height);
}
else {
if (is_deinterlace_enabled(postproc, &vi)) {
@ -1165,6 +1209,15 @@ gst_vaapipostproc_set_property(
case PROP_FORMAT:
postproc->format = g_value_get_enum(value);
break;
case PROP_WIDTH:
postproc->width = g_value_get_uint(value);
break;
case PROP_HEIGHT:
postproc->height = g_value_get_uint(value);
break;
case PROP_FORCE_ASPECT_RATIO:
postproc->keep_aspect = g_value_get_boolean(value);
break;
case PROP_DEINTERLACE_MODE:
postproc->deinterlace_mode = g_value_get_enum(value);
break;
@ -1191,6 +1244,15 @@ gst_vaapipostproc_get_property(
case PROP_FORMAT:
g_value_set_enum(value, postproc->format);
break;
case PROP_WIDTH:
g_value_set_uint(value, postproc->width);
break;
case PROP_HEIGHT:
g_value_set_uint(value, postproc->height);
break;
case PROP_FORCE_ASPECT_RATIO:
g_value_set_boolean(value, postproc->keep_aspect);
break;
case PROP_DEINTERLACE_MODE:
g_value_set_enum(value, postproc->deinterlace_mode);
break;
@ -1294,6 +1356,54 @@ gst_vaapipostproc_class_init(GstVaapiPostprocClass *klass)
g_object_class_install_property(object_class,
PROP_FORMAT, filter_op->pspec);
/**
* GstVaapiPostproc:width:
*
* The forced output width in pixels. If set to zero, the width is
* calculated from the height if aspect ration is preserved, or
* inherited from the sink caps width
*/
g_object_class_install_property
(object_class,
PROP_WIDTH,
g_param_spec_uint("width",
"Width",
"Forced output width",
0, G_MAXINT, 0,
G_PARAM_READWRITE));
/**
* GstVaapiPostproc:height:
*
* The forced output height in pixels. If set to zero, the height
* is calculated from the width if aspect ration is preserved, or
* inherited from the sink caps height
*/
g_object_class_install_property
(object_class,
PROP_HEIGHT,
g_param_spec_uint("height",
"Height",
"Forced output height",
0, G_MAXINT, 0,
G_PARAM_READWRITE));
/**
* GstVaapiPostproc:force-aspect-ratio:
*
* When enabled, scaling respects video aspect ratio; when
* disabled, the video is distorted to fit the width and height
* properties.
*/
g_object_class_install_property
(object_class,
PROP_FORCE_ASPECT_RATIO,
g_param_spec_boolean("force-aspect-ratio",
"Force aspect ratio",
"When enabled, scaling will respect original aspect ratio",
TRUE,
G_PARAM_READWRITE));
g_ptr_array_unref(filter_ops);
}
@ -1304,6 +1414,7 @@ gst_vaapipostproc_init(GstVaapiPostproc *postproc)
postproc->deinterlace_mode = DEFAULT_DEINTERLACE_MODE;
postproc->deinterlace_method = DEFAULT_DEINTERLACE_METHOD;
postproc->field_duration = GST_CLOCK_TIME_NONE;
postproc->keep_aspect = TRUE;
gst_video_info_init(&postproc->sinkpad_info);
gst_video_info_init(&postproc->srcpad_info);

3
gst/vaapi/gstvaapipostproc.h
View file

@ -111,6 +111,8 @@ struct _GstVaapiPostproc {
GstVideoInfo filter_pool_info;
GArray *filter_formats;
GstVideoFormat format; /* output video format (encoded) */
guint width;
guint height;
guint flags;
GstCaps *allowed_sinkpad_caps;
@ -131,6 +133,7 @@ struct _GstVaapiPostproc {
guint is_raw_yuv : 1;
guint use_vpp : 1;
guint keep_aspect : 1;
};
struct _GstVaapiPostprocClass {