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gstreamer/gst/videoscale/gstvideoscale.c
Wim Taymans ddce68a5c2 video: More video helper library improvements 
Make a new GstVideoFormatinfo structure that contains the specific information
related to a format such as the number of planes, components, subsampling,
pixel stride etc. The result is that we are now able to introduce the concept of
components again in the API.
Use tables to specify the formats and its properties.
Use macros to get information about the video format description.
Move code to set strides, offsets and size into one function.
Remove methods that are not handled with the structures.
Add methods to retrieve pointers and strides to the components in the video.
2011-07-04 16:01:14 +02:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2005 David Schleef <ds@schleef.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-videoscale
* @see_also: videorate, videoconvert
*
* This element resizes video frames. By default the element will try to
* negotiate to the same size on the source and sinkpad so that no scaling
* is needed. It is therefore safe to insert this element in a pipeline to
* get more robust behaviour without any cost if no scaling is needed.
*
* This element supports a wide range of color spaces including various YUV and
* RGB formats and is therefore generally able to operate anywhere in a
* pipeline.
*
* <refsect2>
* <title>Example pipelines</title>
* |[
* gst-launch -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoconvert ! videoscale ! ximagesink
* ]| Decode an Ogg/Theora and display the video using ximagesink. Since
* ximagesink cannot perform scaling, the video scaling will be performed by
* videoscale when you resize the video window.
* To create the test Ogg/Theora file refer to the documentation of theoraenc.
* |[
* gst-launch -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoscale ! video/x-raw, width=50 ! xvimagesink
* ]| Decode an Ogg/Theora and display the video using xvimagesink with a width
* of 50.
* </refsect2>
*
* Last reviewed on 2006-03-02 (0.10.4)
*/
/*
* Formulas for PAR, DAR, width and height relations:
*
* dar_n w par_n
* ----- = - * -----
* dar_d h par_d
*
* par_n h dar_n
* ----- = - * -----
* par_d w dar_d
*
* dar_n par_d
* w = h * ----- * -----
* dar_d par_n
*
* dar_d par_n
* h = w * ----- * -----
* dar_n par_d
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <math.h>
#include <gst/video/gstmetavideo.h>
#include "gstvideoscale.h"
#include "gstvideoscaleorc.h"
#include "vs_image.h"
#include "vs_4tap.h"
#include "vs_fill_borders.h"
/* debug variable definition */
GST_DEBUG_CATEGORY (video_scale_debug);
#define DEFAULT_PROP_METHOD GST_VIDEO_SCALE_BILINEAR
#define DEFAULT_PROP_ADD_BORDERS FALSE
enum
{
PROP_0,
PROP_METHOD,
PROP_ADD_BORDERS
/* FILL ME */
};
#undef GST_VIDEO_SIZE_RANGE
#define GST_VIDEO_SIZE_RANGE "(int) [ 1, 32767]"
#define GST_VIDEO_FORMATS "{ \"I420\", \"YV12\", \"YUY2\", \"UYVY\", \"AYUV\", \"RGBx\", " \
"\"BGRx\", \"xRGB\", \"xBGR\", \"RGBA\", \"BGRA\", \"ARGB\", \"ABGR\", \"RGB\", " \
"\"BGR\", \"Y41B\", \"Y42B\", \"YVYU\", \"Y444\", \"GRAY8\", \"GRAY16_BE\", \"GRAY16_LE\", " \
"\"v308\", \"Y800\", \"Y16\", \"RGB16\", \"RGB15\", \"ARGB64\", \"AYUV64\" } "
static GstStaticCaps gst_video_scale_format_caps[] = {
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS))
};
#define GST_TYPE_VIDEO_SCALE_METHOD (gst_video_scale_method_get_type())
static GType
gst_video_scale_method_get_type (void)
{
static GType video_scale_method_type = 0;
static const GEnumValue video_scale_methods[] = {
{GST_VIDEO_SCALE_NEAREST, "Nearest Neighbour", "nearest-neighbour"},
{GST_VIDEO_SCALE_BILINEAR, "Bilinear", "bilinear"},
{GST_VIDEO_SCALE_4TAP, "4-tap", "4-tap"},
{0, NULL, NULL},
};
if (!video_scale_method_type) {
video_scale_method_type =
g_enum_register_static ("GstVideoScaleMethod", video_scale_methods);
}
return video_scale_method_type;
}
static GstCaps *
gst_video_scale_get_capslist (void)
{
static GstCaps *caps = NULL;
static volatile gsize inited = 0;
if (g_once_init_enter (&inited)) {
gint i;
g_assert (caps == NULL);
caps = gst_caps_new_empty ();
for (i = 0; i < G_N_ELEMENTS (gst_video_scale_format_caps); i++)
gst_caps_append (caps,
gst_caps_make_writable
(gst_static_caps_get (&gst_video_scale_format_caps[i])));
g_once_init_leave (&inited, 1);
}
return caps;
}
static GstPadTemplate *
gst_video_scale_src_template_factory (void)
{
return gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_video_scale_get_capslist ());
}
static GstPadTemplate *
gst_video_scale_sink_template_factory (void)
{
return gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_video_scale_get_capslist ());
}
static void gst_video_scale_finalize (GstVideoScale * videoscale);
static gboolean gst_video_scale_src_event (GstBaseTransform * trans,
GstEvent * event);
/* base transform vmethods */
static GstCaps *gst_video_scale_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter);
static gboolean gst_video_scale_set_caps (GstBaseTransform * trans,
GstCaps * in, GstCaps * out);
static gboolean gst_video_scale_get_unit_size (GstBaseTransform * trans,
GstCaps * caps, gsize * size);
static gboolean gst_video_scale_setup_allocation (GstBaseTransform * trans,
GstQuery * query);
static GstFlowReturn gst_video_scale_transform (GstBaseTransform * trans,
GstBuffer * in, GstBuffer * out);
static void gst_video_scale_fixate_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
static void gst_video_scale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_video_scale_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
#define gst_video_scale_parent_class parent_class
G_DEFINE_TYPE (GstVideoScale, gst_video_scale, GST_TYPE_VIDEO_FILTER);
static void
gst_video_scale_class_init (GstVideoScaleClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = (GstElementClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
gobject_class->finalize = (GObjectFinalizeFunc) gst_video_scale_finalize;
gobject_class->set_property = gst_video_scale_set_property;
gobject_class->get_property = gst_video_scale_get_property;
g_object_class_install_property (gobject_class, PROP_METHOD,
g_param_spec_enum ("method", "method", "method",
GST_TYPE_VIDEO_SCALE_METHOD, DEFAULT_PROP_METHOD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ADD_BORDERS,
g_param_spec_boolean ("add-borders", "Add Borders",
"Add black borders if necessary to keep the display aspect ratio",
DEFAULT_PROP_ADD_BORDERS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_details_simple (element_class,
"Video scaler", "Filter/Converter/Video/Scaler",
"Resizes video", "Wim Taymans <wim.taymans@chello.be>");
gst_element_class_add_pad_template (element_class,
gst_video_scale_sink_template_factory ());
gst_element_class_add_pad_template (element_class,
gst_video_scale_src_template_factory ());
trans_class->transform_caps =
GST_DEBUG_FUNCPTR (gst_video_scale_transform_caps);
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_video_scale_set_caps);
trans_class->get_unit_size =
GST_DEBUG_FUNCPTR (gst_video_scale_get_unit_size);
trans_class->setup_allocation =
GST_DEBUG_FUNCPTR (gst_video_scale_setup_allocation);
trans_class->transform = GST_DEBUG_FUNCPTR (gst_video_scale_transform);
trans_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_video_scale_fixate_caps);
trans_class->src_event = GST_DEBUG_FUNCPTR (gst_video_scale_src_event);
}
static void
gst_video_scale_init (GstVideoScale * videoscale)
{
videoscale->tmp_buf = NULL;
videoscale->method = DEFAULT_PROP_METHOD;
videoscale->add_borders = DEFAULT_PROP_ADD_BORDERS;
}
static void
gst_video_scale_finalize (GstVideoScale * videoscale)
{
if (videoscale->tmp_buf)
g_free (videoscale->tmp_buf);
G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT (videoscale));
}
static void
gst_video_scale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoScale *vscale = GST_VIDEO_SCALE (object);
switch (prop_id) {
case PROP_METHOD:
GST_OBJECT_LOCK (vscale);
vscale->method = g_value_get_enum (value);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_ADD_BORDERS:
GST_OBJECT_LOCK (vscale);
vscale->add_borders = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (vscale);
gst_base_transform_reconfigure (GST_BASE_TRANSFORM_CAST (vscale));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_video_scale_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVideoScale *vscale = GST_VIDEO_SCALE (object);
switch (prop_id) {
case PROP_METHOD:
GST_OBJECT_LOCK (vscale);
g_value_set_enum (value, vscale->method);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_ADD_BORDERS:
GST_OBJECT_LOCK (vscale);
g_value_set_boolean (value, vscale->add_borders);
GST_OBJECT_UNLOCK (vscale);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstCaps *
gst_video_scale_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
{
GstCaps *ret;
GstStructure *structure;
gint i, n;
GST_DEBUG_OBJECT (trans,
"Transforming caps %" GST_PTR_FORMAT " in direction %s", caps,
(direction == GST_PAD_SINK) ? "sink" : "src");
ret = gst_caps_new_empty ();
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
structure = gst_caps_get_structure (caps, i);
/* If this is already expressed by the existing caps
* skip this structure */
if (i > 0 && gst_caps_is_subset_structure (ret, structure))
continue;
structure = gst_structure_copy (structure);
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
/* if pixel aspect ratio, make a range of it */
if (gst_structure_has_field (structure, "pixel-aspect-ratio")) {
gst_structure_set (structure, "pixel-aspect-ratio",
GST_TYPE_FRACTION_RANGE, 1, G_MAXINT, G_MAXINT, 1, NULL);
}
gst_caps_append_structure (ret, structure);
}
if (filter) {
GstCaps *intersection;
intersection =
gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (ret);
ret = intersection;
}
GST_DEBUG_OBJECT (trans, "returning caps: %" GST_PTR_FORMAT, ret);
return ret;
}
static gboolean
gst_video_scale_setup_allocation (GstBaseTransform * trans, GstQuery * query)
{
GstBufferPool *pool = NULL;
guint size, min, max, prefix, alignment;
gst_query_parse_allocation_params (query, &size, &min, &max, &prefix,
&alignment, &pool);
if (pool) {
GstStructure *config;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_add_meta (config, GST_META_API_VIDEO);
gst_buffer_pool_set_config (pool, config);
}
return TRUE;
}
static gboolean
gst_video_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE (trans);
gboolean ret;
GstVideoInfo in_info, out_info;
gint from_dar_n, from_dar_d, to_dar_n, to_dar_d;
ret = gst_video_info_from_caps (&in_info, in);
ret &= gst_video_info_from_caps (&out_info, out);
if (!ret)
goto invalid_formats;
if (!gst_util_fraction_multiply (in_info.width,
in_info.height, out_info.par_n, out_info.par_d, &from_dar_n,
&from_dar_d)) {
from_dar_n = from_dar_d = -1;
}
if (!gst_util_fraction_multiply (out_info.width,
out_info.height, out_info.par_n, out_info.par_d, &to_dar_n,
&to_dar_d)) {
to_dar_n = to_dar_d = -1;
}
videoscale->borders_w = videoscale->borders_h = 0;
if (to_dar_n != from_dar_n || to_dar_d != from_dar_d) {
if (videoscale->add_borders) {
gint n, d, to_h, to_w;
if (from_dar_n != -1 && from_dar_d != -1
&& gst_util_fraction_multiply (from_dar_n, from_dar_d, out_info.par_n,
out_info.par_d, &n, &d)) {
to_h = gst_util_uint64_scale_int (out_info.width, d, n);
if (to_h <= out_info.height) {
videoscale->borders_h = out_info.height - to_h;
videoscale->borders_w = 0;
} else {
to_w = gst_util_uint64_scale_int (out_info.height, n, d);
g_assert (to_w <= out_info.width);
videoscale->borders_h = 0;
videoscale->borders_w = out_info.width - to_w;
}
} else {
GST_WARNING_OBJECT (videoscale, "Can't calculate borders");
}
} else {
GST_WARNING_OBJECT (videoscale, "Can't keep DAR!");
}
}
if (videoscale->tmp_buf)
g_free (videoscale->tmp_buf);
videoscale->tmp_buf = g_malloc (out_info.width * 8 * 4);
gst_base_transform_set_passthrough (trans,
(in_info.width == out_info.width && in_info.height == out_info.height));
GST_DEBUG_OBJECT (videoscale, "from=%dx%d (par=%d/%d dar=%d/%d), size %d "
"-> to=%dx%d (par=%d/%d dar=%d/%d borders=%d:%d), size %d",
in_info.width, in_info.height, out_info.par_n, out_info.par_d,
from_dar_n, from_dar_d, in_info.size, out_info.width,
out_info.height, out_info.par_n, out_info.par_d, to_dar_n, to_dar_d,
videoscale->borders_w, videoscale->borders_h, out_info.size);
videoscale->from_info = in_info;
videoscale->to_info = out_info;
return TRUE;
/* ERRORS */
invalid_formats:
{
GST_DEBUG_OBJECT (videoscale, "could not parse formats");
return FALSE;
}
}
static gboolean
gst_video_scale_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
gsize * size)
{
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
return FALSE;
*size = info.size;
return TRUE;
}
static void
gst_video_scale_fixate_caps (GstBaseTransform * base, GstPadDirection direction,
GstCaps * caps, GstCaps * othercaps)
{
GstStructure *ins, *outs;
const GValue *from_par, *to_par;
GValue fpar = { 0, }, tpar = {
0,};
g_return_if_fail (gst_caps_is_fixed (caps));
GST_DEBUG_OBJECT (base, "trying to fixate othercaps %" GST_PTR_FORMAT
" based on caps %" GST_PTR_FORMAT, othercaps, caps);
ins = gst_caps_get_structure (caps, 0);
outs = gst_caps_get_structure (othercaps, 0);
from_par = gst_structure_get_value (ins, "pixel-aspect-ratio");
to_par = gst_structure_get_value (outs, "pixel-aspect-ratio");
/* If we're fixating from the sinkpad we always set the PAR and
* assume that missing PAR on the sinkpad means 1/1 and
* missing PAR on the srcpad means undefined
*/
if (direction == GST_PAD_SINK) {
if (!from_par) {
g_value_init (&fpar, GST_TYPE_FRACTION);
gst_value_set_fraction (&fpar, 1, 1);
from_par = &fpar;
}
if (!to_par) {
g_value_init (&tpar, GST_TYPE_FRACTION_RANGE);
gst_value_set_fraction_range_full (&tpar, 1, G_MAXINT, G_MAXINT, 1);
to_par = &tpar;
}
} else {
if (!to_par) {
g_value_init (&tpar, GST_TYPE_FRACTION);
gst_value_set_fraction (&tpar, 1, 1);
to_par = &tpar;
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
NULL);
}
if (!from_par) {
g_value_init (&fpar, GST_TYPE_FRACTION);
gst_value_set_fraction (&fpar, 1, 1);
from_par = &fpar;
}
}
/* we have both PAR but they might not be fixated */
{
gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d;
gint w = 0, h = 0;
gint from_dar_n, from_dar_d;
gint num, den;
/* from_par should be fixed */
g_return_if_fail (gst_value_is_fixed (from_par));
from_par_n = gst_value_get_fraction_numerator (from_par);
from_par_d = gst_value_get_fraction_denominator (from_par);
gst_structure_get_int (ins, "width", &from_w);
gst_structure_get_int (ins, "height", &from_h);
gst_structure_get_int (outs, "width", &w);
gst_structure_get_int (outs, "height", &h);
/* if both width and height are already fixed, we can't do anything
* about it anymore */
if (w && h) {
guint n, d;
GST_DEBUG_OBJECT (base, "dimensions already set to %dx%d, not fixating",
w, h);
if (!gst_value_is_fixed (to_par)) {
if (gst_video_calculate_display_ratio (&n, &d, from_w, from_h,
from_par_n, from_par_d, w, h)) {
GST_DEBUG_OBJECT (base, "fixating to_par to %dx%d", n, d);
if (gst_structure_has_field (outs, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (outs,
"pixel-aspect-ratio", n, d);
else if (n != d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
n, d, NULL);
}
}
goto done;
}
/* Calculate input DAR */
if (!gst_util_fraction_multiply (from_w, from_h, from_par_n, from_par_d,
&from_dar_n, &from_dar_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
GST_DEBUG_OBJECT (base, "Input DAR is %d/%d", from_dar_n, from_dar_d);
/* If either width or height are fixed there's not much we
* can do either except choosing a height or width and PAR
* that matches the DAR as good as possible
*/
if (h) {
GstStructure *tmp;
gint set_w, set_par_n, set_par_d;
GST_DEBUG_OBJECT (base, "height is fixed (%d)", h);
/* If the PAR is fixed too, there's not much to do
* except choosing the width that is nearest to the
* width with the same DAR */
if (gst_value_is_fixed (to_par)) {
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
GST_DEBUG_OBJECT (base, "PAR is fixed %d/%d", to_par_n, to_par_d);
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d,
to_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
w = (guint) gst_util_uint64_scale_int (h, num, den);
gst_structure_fixate_field_nearest_int (outs, "width", w);
goto done;
}
/* The PAR is not fixed and it's quite likely that we can set
* an arbitrary PAR. */
/* Check if we can keep the input width */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
gst_structure_get_int (tmp, "width", &set_w);
/* Might have failed but try to keep the DAR nonetheless by
* adjusting the PAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, h, set_w,
&to_par_n, &to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
gst_structure_free (tmp);
goto done;
}
if (!gst_structure_has_field (tmp, "pixel-aspect-ratio"))
gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par);
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
to_par_n, to_par_d);
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
&set_par_d);
gst_structure_free (tmp);
/* Check if the adjusted PAR is accepted */
if (set_par_n == to_par_n && set_par_d == to_par_d) {
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "width", G_TYPE_INT, set_w,
"pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d,
NULL);
goto done;
}
/* Otherwise scale the width to the new PAR and check if the
* adjusted with is accepted. If all that fails we can't keep
* the DAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
set_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
w = (guint) gst_util_uint64_scale_int (h, num, den);
gst_structure_fixate_field_nearest_int (outs, "width", w);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
} else if (w) {
GstStructure *tmp;
gint set_h, set_par_n, set_par_d;
GST_DEBUG_OBJECT (base, "width is fixed (%d)", w);
/* If the PAR is fixed too, there's not much to do
* except choosing the height that is nearest to the
* height with the same DAR */
if (gst_value_is_fixed (to_par)) {
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
GST_DEBUG_OBJECT (base, "PAR is fixed %d/%d", to_par_n, to_par_d);
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d,
to_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
h = (guint) gst_util_uint64_scale_int (w, den, num);
gst_structure_fixate_field_nearest_int (outs, "height", h);
goto done;
}
/* The PAR is not fixed and it's quite likely that we can set
* an arbitrary PAR. */
/* Check if we can keep the input height */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
gst_structure_get_int (tmp, "height", &set_h);
/* Might have failed but try to keep the DAR nonetheless by
* adjusting the PAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, w,
&to_par_n, &to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
gst_structure_free (tmp);
goto done;
}
if (!gst_structure_has_field (tmp, "pixel-aspect-ratio"))
gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par);
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
to_par_n, to_par_d);
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
&set_par_d);
gst_structure_free (tmp);
/* Check if the adjusted PAR is accepted */
if (set_par_n == to_par_n && set_par_d == to_par_d) {
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "height", G_TYPE_INT, set_h,
"pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d,
NULL);
goto done;
}
/* Otherwise scale the height to the new PAR and check if the
* adjusted with is accepted. If all that fails we can't keep
* the DAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
set_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
h = (guint) gst_util_uint64_scale_int (w, den, num);
gst_structure_fixate_field_nearest_int (outs, "height", h);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
} else if (gst_value_is_fixed (to_par)) {
GstStructure *tmp;
gint set_h, set_w, f_h, f_w;
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
/* Calculate scale factor for the PAR change */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_n,
to_par_d, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
/* Try to keep the input height (because of interlacing) */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
gst_structure_get_int (tmp, "height", &set_h);
/* This might have failed but try to scale the width
* to keep the DAR nonetheless */
w = (guint) gst_util_uint64_scale_int (set_h, num, den);
gst_structure_fixate_field_nearest_int (tmp, "width", w);
gst_structure_get_int (tmp, "width", &set_w);
gst_structure_free (tmp);
/* We kept the DAR and the height is nearest to the original height */
if (set_w == w) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
goto done;
}
f_h = set_h;
f_w = set_w;
/* If the former failed, try to keep the input width at least */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
gst_structure_get_int (tmp, "width", &set_w);
/* This might have failed but try to scale the width
* to keep the DAR nonetheless */
h = (guint) gst_util_uint64_scale_int (set_w, den, num);
gst_structure_fixate_field_nearest_int (tmp, "height", h);
gst_structure_get_int (tmp, "height", &set_h);
gst_structure_free (tmp);
/* We kept the DAR and the width is nearest to the original width */
if (set_h == h) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
goto done;
}
/* If all this failed, keep the height that was nearest to the orignal
* height and the nearest possible width. This changes the DAR but
* there's not much else to do here.
*/
gst_structure_set (outs, "width", G_TYPE_INT, f_w, "height", G_TYPE_INT,
f_h, NULL);
goto done;
} else {
GstStructure *tmp;
gint set_h, set_w, set_par_n, set_par_d, tmp2;
/* width, height and PAR are not fixed but passthrough is not possible */
/* First try to keep the height and width as good as possible
* and scale PAR */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
gst_structure_get_int (tmp, "height", &set_h);
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
gst_structure_get_int (tmp, "width", &set_w);
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, set_w,
&to_par_n, &to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
if (!gst_structure_has_field (tmp, "pixel-aspect-ratio"))
gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par);
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
to_par_n, to_par_d);
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
&set_par_d);
gst_structure_free (tmp);
if (set_par_n == to_par_n && set_par_d == to_par_d) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
}
/* Otherwise try to scale width to keep the DAR with the set
* PAR and height */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
set_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
w = (guint) gst_util_uint64_scale_int (set_h, num, den);
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "width", w);
gst_structure_get_int (tmp, "width", &tmp2);
gst_structure_free (tmp);
if (tmp2 == w) {
gst_structure_set (outs, "width", G_TYPE_INT, tmp2, "height",
G_TYPE_INT, set_h, NULL);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
}
/* ... or try the same with the height */
h = (guint) gst_util_uint64_scale_int (set_w, den, num);
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", h);
gst_structure_get_int (tmp, "height", &tmp2);
gst_structure_free (tmp);
if (tmp2 == h) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, tmp2, NULL);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
}
/* If all fails we can't keep the DAR and take the nearest values
* for everything from the first try */
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
}
}
done:
GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, othercaps);
if (from_par == &fpar)
g_value_unset (&fpar);
if (to_par == &tpar)
g_value_unset (&tpar);
}
static void
gst_video_scale_setup_vs_image (VSImage * image, GstVideoFrame * frame,
gint component, gint b_w, gint b_h)
{
GstVideoFormat format;
gint width, height;
format = GST_VIDEO_FRAME_FORMAT (frame);
width = GST_VIDEO_FRAME_WIDTH (frame);
height = GST_VIDEO_FRAME_HEIGHT (frame);
image->real_width = GST_VIDEO_FRAME_COMP_WIDTH (frame, component);
image->real_height = GST_VIDEO_FRAME_COMP_HEIGHT (frame, component);
image->width = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (frame->info.finfo,
component, MAX (1, width - b_w));
image->height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (frame->info.finfo,
component, MAX (1, height - b_h));
image->border_top = (image->real_height - image->height) / 2;
image->border_bottom = image->real_height - image->height - image->border_top;
if (format == GST_VIDEO_FORMAT_YUY2 || format == GST_VIDEO_FORMAT_YVYU
|| format == GST_VIDEO_FORMAT_UYVY) {
g_assert (component == 0);
image->border_left = (image->real_width - image->width) / 2;
if (image->border_left % 2 == 1)
image->border_left--;
image->border_right = image->real_width - image->width - image->border_left;
} else {
image->border_left = (image->real_width - image->width) / 2;
image->border_right = image->real_width - image->width - image->border_left;
}
image->real_pixels = frame->data[component];
image->stride = frame->info.stride[component];
image->pixels =
image->real_pixels + image->border_top * image->stride +
image->border_left * GST_VIDEO_FRAME_COMP_PSTRIDE (frame, component);
}
static const guint8 *
_get_black_for_format (GstVideoFormat format)
{
static const guint8 black[][4] = {
{255, 0, 0, 0}, /* 0 = ARGB, ABGR, xRGB, xBGR */
{0, 0, 0, 255}, /* 1 = RGBA, BGRA, RGBx, BGRx */
{255, 16, 128, 128}, /* 2 = AYUV */
{0, 0, 0, 0}, /* 3 = RGB and BGR */
{16, 128, 128, 0}, /* 4 = v301 */
{16, 128, 16, 128}, /* 5 = YUY2, YUYV */
{128, 16, 128, 16}, /* 6 = UYVY */
{16, 0, 0, 0}, /* 7 = Y */
{0, 0, 0, 0} /* 8 = RGB565, RGB666 */
};
switch (format) {
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_ARGB64:
return black[0];
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
return black[1];
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_AYUV64:
return black[2];
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
return black[3];
case GST_VIDEO_FORMAT_v308:
return black[4];
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_YVYU:
return black[5];
case GST_VIDEO_FORMAT_UYVY:
return black[6];
case GST_VIDEO_FORMAT_Y800:
case GST_VIDEO_FORMAT_GRAY8:
return black[7];
case GST_VIDEO_FORMAT_GRAY16_LE:
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_Y16:
return NULL; /* Handled by the caller */
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_Y42B:
case GST_VIDEO_FORMAT_Y41B:
return black[4]; /* Y, U, V, 0 */
case GST_VIDEO_FORMAT_RGB16:
case GST_VIDEO_FORMAT_RGB15:
return black[8];
default:
return NULL;
}
}
static GstFlowReturn
gst_video_scale_transform (GstBaseTransform * trans, GstBuffer * in,
GstBuffer * out)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE (trans);
GstFlowReturn ret = GST_FLOW_OK;
GstVideoFrame in_frame, out_frame;
VSImage dest[4] = { {NULL,}, };
VSImage src[4] = { {NULL,}, };
gint method;
const guint8 *black;
gboolean add_borders;
GstVideoFormat format;
gint i;
GST_OBJECT_LOCK (videoscale);
method = videoscale->method;
add_borders = videoscale->add_borders;
GST_OBJECT_UNLOCK (videoscale);
format = GST_VIDEO_INFO_FORMAT (&videoscale->from_info);
black = _get_black_for_format (format);
if (videoscale->from_info.width == 1) {
method = GST_VIDEO_SCALE_NEAREST;
}
if (method == GST_VIDEO_SCALE_4TAP &&
(videoscale->from_info.width < 4 || videoscale->from_info.height < 4)) {
method = GST_VIDEO_SCALE_BILINEAR;
}
gst_video_frame_map (&in_frame, &videoscale->from_info, in, GST_MAP_READ);
gst_video_frame_map (&out_frame, &videoscale->to_info, out, GST_MAP_WRITE);
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);
}
switch (format) {
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_AYUV:
if (add_borders)
vs_fill_borders_RGBA (&dest[0], black);
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_RGBA (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_RGBA (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_RGBA (&dest[0], &src[0], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
case GST_VIDEO_FORMAT_ARGB64:
case GST_VIDEO_FORMAT_AYUV64:
if (add_borders)
vs_fill_borders_AYUV64 (&dest[0], black);
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_AYUV64 (&dest[0], &src[0],
videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_AYUV64 (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_AYUV64 (&dest[0], &src[0], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
case GST_VIDEO_FORMAT_v308:
if (add_borders)
vs_fill_borders_RGB (&dest[0], black);
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_RGB (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_RGB (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_RGB (&dest[0], &src[0], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_YVYU:
if (add_borders)
vs_fill_borders_YUYV (&dest[0], black);
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_YUYV (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_YUYV (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_YUYV (&dest[0], &src[0], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
case GST_VIDEO_FORMAT_UYVY:
if (add_borders)
vs_fill_borders_UYVY (&dest[0], black);
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_UYVY (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_UYVY (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_UYVY (&dest[0], &src[0], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
case GST_VIDEO_FORMAT_Y800:
case GST_VIDEO_FORMAT_GRAY8:
if (add_borders)
vs_fill_borders_Y (&dest[0], black);
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_Y (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_Y (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_Y (&dest[0], &src[0], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
case GST_VIDEO_FORMAT_GRAY16_LE:
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_Y16:
if (add_borders)
vs_fill_borders_Y16 (&dest[0], 0);
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_Y16 (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_Y16 (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_Y16 (&dest[0], &src[0], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_Y42B:
case GST_VIDEO_FORMAT_Y41B:
if (add_borders) {
vs_fill_borders_Y (&dest[0], black);
vs_fill_borders_Y (&dest[1], black + 1);
vs_fill_borders_Y (&dest[2], black + 2);
}
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_Y (&dest[0], &src[0], videoscale->tmp_buf);
vs_image_scale_nearest_Y (&dest[1], &src[1], videoscale->tmp_buf);
vs_image_scale_nearest_Y (&dest[2], &src[2], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_Y (&dest[0], &src[0], videoscale->tmp_buf);
vs_image_scale_linear_Y (&dest[1], &src[1], videoscale->tmp_buf);
vs_image_scale_linear_Y (&dest[2], &src[2], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_Y (&dest[0], &src[0], videoscale->tmp_buf);
vs_image_scale_4tap_Y (&dest[1], &src[1], videoscale->tmp_buf);
vs_image_scale_4tap_Y (&dest[2], &src[2], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
case GST_VIDEO_FORMAT_RGB16:
if (add_borders)
vs_fill_borders_RGB565 (&dest[0], black);
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_RGB565 (&dest[0], &src[0],
videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_RGB565 (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_RGB565 (&dest[0], &src[0], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
case GST_VIDEO_FORMAT_RGB15:
if (add_borders)
vs_fill_borders_RGB555 (&dest[0], black);
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
vs_image_scale_nearest_RGB555 (&dest[0], &src[0],
videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_BILINEAR:
vs_image_scale_linear_RGB555 (&dest[0], &src[0], videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_4TAP:
vs_image_scale_4tap_RGB555 (&dest[0], &src[0], videoscale->tmp_buf);
break;
default:
goto unknown_mode;
}
break;
default:
goto unsupported;
}
GST_LOG_OBJECT (videoscale, "pushing buffer of %d bytes",
gst_buffer_get_size (out));
done:
gst_video_frame_unmap (&out_frame);
gst_video_frame_unmap (&in_frame);
return ret;
/* ERRORS */
unsupported:
{
GST_ELEMENT_ERROR (videoscale, STREAM, NOT_IMPLEMENTED, (NULL),
("Unsupported format %d for scaling method %d", format, method));
ret = GST_FLOW_ERROR;
goto done;
}
unknown_mode:
{
GST_ELEMENT_ERROR (videoscale, STREAM, NOT_IMPLEMENTED, (NULL),
("Unknown scaling method %d", videoscale->method));
ret = GST_FLOW_ERROR;
goto done;
}
}
static gboolean
gst_video_scale_src_event (GstBaseTransform * trans, GstEvent * event)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE (trans);
gboolean ret;
gdouble a;
GstStructure *structure;
GST_DEBUG_OBJECT (videoscale, "handling %s event",
GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NAVIGATION:
event =
GST_EVENT (gst_mini_object_make_writable (GST_MINI_OBJECT (event)));
structure = (GstStructure *) gst_event_get_structure (event);
if (gst_structure_get_double (structure, "pointer_x", &a)) {
gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
a * videoscale->from_info.width / videoscale->to_info.width, NULL);
}
if (gst_structure_get_double (structure, "pointer_y", &a)) {
gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
a * videoscale->from_info.height / videoscale->to_info.height,
NULL);
}
break;
default:
break;
}
ret = GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans, event);
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
gst_videoscale_orc_init ();
if (!gst_element_register (plugin, "videoscale", GST_RANK_NONE,
GST_TYPE_VIDEO_SCALE))
return FALSE;
GST_DEBUG_CATEGORY_INIT (video_scale_debug, "videoscale", 0,
"videoscale element");
vs_4tap_init ();
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videoscale",
"Resizes video", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,
GST_PACKAGE_ORIGIN)
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