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gstreamer/gst/videoscale/gstvideoscale.c
Matthew Waters 98249a57db gst: don't use volatile to mean atomic 
volatile is not sufficient to provide atomic guarantees and real atomics
should be used instead.  GCC 11 has started warning about using volatile
with atomic operations.

https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719

Discovered in https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/868

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1073>
2021-03-19 04:20:19 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2005-2012 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-videoscale
* @title: 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.
*
* ## Example pipelines
* |[
* gst-launch-1.0 -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoconvert ! videoscale ! autovideosink
* ]|
* Decode an Ogg/Theora and display the video. If the video sink chosen
* 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-1.0 -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoconvert ! videoscale ! video/x-raw,width=100 ! autovideosink
* ]|
* Decode an Ogg/Theora and display the video with a width of 100.
*
*/
/*
* 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/gstvideometa.h>
#include <gst/video/gstvideopool.h>
#include "gstvideoscale.h"
#define GST_CAT_DEFAULT video_scale_debug
GST_DEBUG_CATEGORY_STATIC (video_scale_debug);
GST_DEBUG_CATEGORY_STATIC (CAT_PERFORMANCE);
#define DEFAULT_PROP_METHOD GST_VIDEO_SCALE_BILINEAR
#define DEFAULT_PROP_ADD_BORDERS TRUE
#define DEFAULT_PROP_SHARPNESS 1.0
#define DEFAULT_PROP_SHARPEN 0.0
#define DEFAULT_PROP_DITHER FALSE
#define DEFAULT_PROP_SUBMETHOD 1
#define DEFAULT_PROP_ENVELOPE 2.0
#define DEFAULT_PROP_GAMMA_DECODE FALSE
#define DEFAULT_PROP_N_THREADS 1
enum
{
PROP_0,
PROP_METHOD,
PROP_ADD_BORDERS,
PROP_SHARPNESS,
PROP_SHARPEN,
PROP_DITHER,
PROP_SUBMETHOD,
PROP_ENVELOPE,
PROP_GAMMA_DECODE,
PROP_N_THREADS
};
#undef GST_VIDEO_SIZE_RANGE
#define GST_VIDEO_SIZE_RANGE "(int) [ 1, 32767]"
/* FIXME: add v210 support
* FIXME: add v216 support
* FIXME: add UYVP support
* FIXME: add A420 support
* FIXME: add YUV9 support
* FIXME: add YVU9 support
* FIXME: add IYU1 support
* FIXME: add r210 support
*/
#define GST_VIDEO_FORMATS GST_VIDEO_FORMATS_ALL
static GstStaticCaps gst_video_scale_format_caps =
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS) ";"
GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY", GST_VIDEO_FORMATS));
static GQuark _size_quark;
static GQuark _scale_quark;
#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 (2-tap)", "bilinear"},
{GST_VIDEO_SCALE_4TAP, "4-tap Sinc", "4-tap"},
{GST_VIDEO_SCALE_LANCZOS, "Lanczos", "lanczos"},
{GST_VIDEO_SCALE_BILINEAR2, "Bilinear (multi-tap)", "bilinear2"},
{GST_VIDEO_SCALE_SINC, "Sinc (multi-tap)", "sinc"},
{GST_VIDEO_SCALE_HERMITE, "Hermite (multi-tap)", "hermite"},
{GST_VIDEO_SCALE_SPLINE, "Spline (multi-tap)", "spline"},
{GST_VIDEO_SCALE_CATROM, "Catmull-Rom (multi-tap)", "catrom"},
{GST_VIDEO_SCALE_MITCHELL, "Mitchell (multi-tap)", "mitchell"},
{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 gsize inited = 0;
if (g_once_init_enter (&inited)) {
caps = gst_static_caps_get (&gst_video_scale_format_caps);
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 GstCaps *gst_video_scale_fixate_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
static gboolean gst_video_scale_transform_meta (GstBaseTransform * trans,
GstBuffer * outbuf, GstMeta * meta, GstBuffer * inbuf);
static gboolean gst_video_scale_set_info (GstVideoFilter * filter,
GstCaps * in, GstVideoInfo * in_info, GstCaps * out,
GstVideoInfo * out_info);
static GstFlowReturn gst_video_scale_transform_frame (GstVideoFilter * filter,
GstVideoFrame * in, GstVideoFrame * out);
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);
GST_ELEMENT_REGISTER_DEFINE (videoscale, "videoscale",
GST_RANK_NONE, GST_TYPE_VIDEO_SCALE);
static GstCapsFeatures *features_format_interlaced,
*features_format_interlaced_sysmem;
static void
gst_video_scale_class_init (GstVideoScaleClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = (GstElementClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
GstVideoFilterClass *filter_class = (GstVideoFilterClass *) 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));
g_object_class_install_property (gobject_class, PROP_SHARPNESS,
g_param_spec_double ("sharpness", "Sharpness",
"Sharpness of filter", 0.5, 1.5, DEFAULT_PROP_SHARPNESS,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SHARPEN,
g_param_spec_double ("sharpen", "Sharpen",
"Sharpening", 0.0, 1.0, DEFAULT_PROP_SHARPEN,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DITHER,
g_param_spec_boolean ("dither", "Dither",
"Add dither (only used for Lanczos method)",
DEFAULT_PROP_DITHER,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
#if 0
/* I am hiding submethod for now, since it's poorly named, poorly
* documented, and will probably just get people into trouble. */
g_object_class_install_property (gobject_class, PROP_SUBMETHOD,
g_param_spec_int ("submethod", "submethod",
"submethod", 0, 3, DEFAULT_PROP_SUBMETHOD,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
#endif
g_object_class_install_property (gobject_class, PROP_ENVELOPE,
g_param_spec_double ("envelope", "Envelope",
"Size of filter envelope", 1.0, 5.0, DEFAULT_PROP_ENVELOPE,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_GAMMA_DECODE,
g_param_spec_boolean ("gamma-decode", "Gamma Decode",
"Decode gamma before scaling", DEFAULT_PROP_GAMMA_DECODE,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_N_THREADS,
g_param_spec_uint ("n-threads", "Threads",
"Maximum number of threads to use", 0, G_MAXUINT,
DEFAULT_PROP_N_THREADS,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (element_class,
"Video scaler", "Filter/Converter/Video/Scaler",
"Resizes video", "Wim Taymans <wim.taymans@gmail.com>");
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->fixate_caps = GST_DEBUG_FUNCPTR (gst_video_scale_fixate_caps);
trans_class->src_event = GST_DEBUG_FUNCPTR (gst_video_scale_src_event);
trans_class->transform_meta =
GST_DEBUG_FUNCPTR (gst_video_scale_transform_meta);
filter_class->set_info = GST_DEBUG_FUNCPTR (gst_video_scale_set_info);
filter_class->transform_frame =
GST_DEBUG_FUNCPTR (gst_video_scale_transform_frame);
_size_quark = g_quark_from_static_string (GST_META_TAG_VIDEO_SIZE_STR);
_scale_quark = gst_video_meta_transform_scale_get_quark ();
gst_type_mark_as_plugin_api (GST_TYPE_VIDEO_SCALE_METHOD, 0);
}
static void
gst_video_scale_init (GstVideoScale * videoscale)
{
videoscale->method = DEFAULT_PROP_METHOD;
videoscale->add_borders = DEFAULT_PROP_ADD_BORDERS;
videoscale->submethod = DEFAULT_PROP_SUBMETHOD;
videoscale->sharpness = DEFAULT_PROP_SHARPNESS;
videoscale->sharpen = DEFAULT_PROP_SHARPEN;
videoscale->dither = DEFAULT_PROP_DITHER;
videoscale->envelope = DEFAULT_PROP_ENVELOPE;
videoscale->gamma_decode = DEFAULT_PROP_GAMMA_DECODE;
videoscale->n_threads = DEFAULT_PROP_N_THREADS;
}
static void
gst_video_scale_finalize (GstVideoScale * videoscale)
{
if (videoscale->convert)
gst_video_converter_free (videoscale->convert);
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_src (GST_BASE_TRANSFORM_CAST (vscale));
break;
case PROP_SHARPNESS:
GST_OBJECT_LOCK (vscale);
vscale->sharpness = g_value_get_double (value);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_SHARPEN:
GST_OBJECT_LOCK (vscale);
vscale->sharpen = g_value_get_double (value);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_DITHER:
GST_OBJECT_LOCK (vscale);
vscale->dither = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_SUBMETHOD:
GST_OBJECT_LOCK (vscale);
vscale->submethod = g_value_get_int (value);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_ENVELOPE:
GST_OBJECT_LOCK (vscale);
vscale->envelope = g_value_get_double (value);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_GAMMA_DECODE:
GST_OBJECT_LOCK (vscale);
vscale->gamma_decode = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_N_THREADS:
GST_OBJECT_LOCK (vscale);
vscale->n_threads = g_value_get_uint (value);
GST_OBJECT_UNLOCK (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;
case PROP_SHARPNESS:
GST_OBJECT_LOCK (vscale);
g_value_set_double (value, vscale->sharpness);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_SHARPEN:
GST_OBJECT_LOCK (vscale);
g_value_set_double (value, vscale->sharpen);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_DITHER:
GST_OBJECT_LOCK (vscale);
g_value_set_boolean (value, vscale->dither);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_SUBMETHOD:
GST_OBJECT_LOCK (vscale);
g_value_set_int (value, vscale->submethod);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_ENVELOPE:
GST_OBJECT_LOCK (vscale);
g_value_set_double (value, vscale->envelope);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_GAMMA_DECODE:
GST_OBJECT_LOCK (vscale);
g_value_set_boolean (value, vscale->gamma_decode);
GST_OBJECT_UNLOCK (vscale);
break;
case PROP_N_THREADS:
GST_OBJECT_LOCK (vscale);
g_value_set_uint (value, vscale->n_threads);
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;
GstCapsFeatures *features;
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);
features = gst_caps_get_features (caps, i);
/* If this is already expressed by the existing caps
* skip this structure */
if (i > 0 && gst_caps_is_subset_structure_full (ret, structure, features))
continue;
/* make copy */
structure = gst_structure_copy (structure);
/* If the features are non-sysmem we can only do passthrough */
if (!gst_caps_features_is_any (features)
&& (gst_caps_features_is_equal (features,
GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY)
|| gst_caps_features_is_equal (features, features_format_interlaced)
|| gst_caps_features_is_equal (features,
features_format_interlaced_sysmem))) {
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_full (ret, structure,
gst_caps_features_copy (features));
}
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_transform_meta (GstBaseTransform * trans, GstBuffer * outbuf,
GstMeta * meta, GstBuffer * inbuf)
{
GstVideoFilter *videofilter = GST_VIDEO_FILTER (trans);
const GstMetaInfo *info = meta->info;
const gchar *const *tags;
const gchar *const *curr = NULL;
gboolean should_copy = TRUE;
const gchar *const valid_tags[] = { GST_META_TAG_VIDEO_STR,
GST_META_TAG_VIDEO_COLORSPACE_STR,
GST_META_TAG_VIDEO_ORIENTATION_STR,
GST_META_TAG_VIDEO_SIZE_STR
};
tags = gst_meta_api_type_get_tags (info->api);
/* No specific tags, we are good to copy */
if (!tags) {
return TRUE;
}
/* We are only changing size, we can preserve other metas tagged as
orientation and colorspace */
for (curr = tags; *curr; ++curr) {
/* We dont handle any other tag */
if (!g_strv_contains (valid_tags, *curr)) {
should_copy = FALSE;
break;
}
}
/* Cant handle the tags in this meta, let the parent class handle it */
if (!should_copy) {
return GST_BASE_TRANSFORM_CLASS (parent_class)->transform_meta (trans,
outbuf, meta, inbuf);
}
/* This meta is size sensitive, try to transform it accordingly */
if (gst_meta_api_type_has_tag (info->api, _size_quark)) {
GstVideoMetaTransform trans =
{ &videofilter->in_info, &videofilter->out_info };
if (info->transform_func)
return info->transform_func (outbuf, meta, inbuf, _scale_quark, &trans);
return FALSE;
}
/* No need to transform, we can safely copy this meta */
return TRUE;
}
static gboolean
gst_video_scale_set_info (GstVideoFilter * filter, GstCaps * in,
GstVideoInfo * in_info, GstCaps * out, GstVideoInfo * out_info)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE (filter);
gint from_dar_n, from_dar_d, to_dar_n, to_dar_d;
if (!gst_util_fraction_multiply (in_info->width,
in_info->height, in_info->par_n, in_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_d, out_info->par_n, &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 (in_info->width == out_info->width && in_info->height == out_info->height
&& videoscale->borders_w == 0 && videoscale->borders_h == 0) {
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (filter), TRUE);
} else {
GstStructure *options;
GST_CAT_DEBUG_OBJECT (CAT_PERFORMANCE, filter, "setup videoscaling");
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (filter), FALSE);
options = gst_structure_new_empty ("videoscale");
switch (videoscale->method) {
case GST_VIDEO_SCALE_NEAREST:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_NEAREST,
NULL);
break;
case GST_VIDEO_SCALE_BILINEAR:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_LINEAR,
GST_VIDEO_RESAMPLER_OPT_MAX_TAPS, G_TYPE_INT, 2, NULL);
break;
case GST_VIDEO_SCALE_4TAP:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_SINC,
GST_VIDEO_RESAMPLER_OPT_MAX_TAPS, G_TYPE_INT, 4, NULL);
break;
case GST_VIDEO_SCALE_LANCZOS:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_LANCZOS,
NULL);
break;
case GST_VIDEO_SCALE_BILINEAR2:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_LINEAR,
NULL);
break;
case GST_VIDEO_SCALE_SINC:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_SINC,
NULL);
break;
case GST_VIDEO_SCALE_HERMITE:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_CUBIC,
GST_VIDEO_RESAMPLER_OPT_CUBIC_B, G_TYPE_DOUBLE, (gdouble) 0.0,
GST_VIDEO_RESAMPLER_OPT_CUBIC_C, G_TYPE_DOUBLE, (gdouble) 0.0,
NULL);
break;
case GST_VIDEO_SCALE_SPLINE:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_CUBIC,
GST_VIDEO_RESAMPLER_OPT_CUBIC_B, G_TYPE_DOUBLE, (gdouble) 1.0,
GST_VIDEO_RESAMPLER_OPT_CUBIC_C, G_TYPE_DOUBLE, (gdouble) 0.0,
NULL);
break;
case GST_VIDEO_SCALE_CATROM:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_CUBIC,
GST_VIDEO_RESAMPLER_OPT_CUBIC_B, G_TYPE_DOUBLE, (gdouble) 0.0,
GST_VIDEO_RESAMPLER_OPT_CUBIC_C, G_TYPE_DOUBLE, (gdouble) 0.5,
NULL);
break;
case GST_VIDEO_SCALE_MITCHELL:
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, GST_VIDEO_RESAMPLER_METHOD_CUBIC,
GST_VIDEO_RESAMPLER_OPT_CUBIC_B, G_TYPE_DOUBLE, (gdouble) 1.0 / 3.0,
GST_VIDEO_RESAMPLER_OPT_CUBIC_C, G_TYPE_DOUBLE, (gdouble) 1.0 / 3.0,
NULL);
break;
}
gst_structure_set (options,
GST_VIDEO_RESAMPLER_OPT_ENVELOPE, G_TYPE_DOUBLE, videoscale->envelope,
GST_VIDEO_RESAMPLER_OPT_SHARPNESS, G_TYPE_DOUBLE, videoscale->sharpness,
GST_VIDEO_RESAMPLER_OPT_SHARPEN, G_TYPE_DOUBLE, videoscale->sharpen,
GST_VIDEO_CONVERTER_OPT_DEST_X, G_TYPE_INT, videoscale->borders_w / 2,
GST_VIDEO_CONVERTER_OPT_DEST_Y, G_TYPE_INT, videoscale->borders_h / 2,
GST_VIDEO_CONVERTER_OPT_DEST_WIDTH, G_TYPE_INT,
out_info->width - videoscale->borders_w,
GST_VIDEO_CONVERTER_OPT_DEST_HEIGHT, G_TYPE_INT,
out_info->height - videoscale->borders_h,
GST_VIDEO_CONVERTER_OPT_MATRIX_MODE, GST_TYPE_VIDEO_MATRIX_MODE,
GST_VIDEO_MATRIX_MODE_NONE, GST_VIDEO_CONVERTER_OPT_DITHER_METHOD,
GST_TYPE_VIDEO_DITHER_METHOD, GST_VIDEO_DITHER_NONE,
GST_VIDEO_CONVERTER_OPT_CHROMA_MODE, GST_TYPE_VIDEO_CHROMA_MODE,
GST_VIDEO_CHROMA_MODE_NONE,
GST_VIDEO_CONVERTER_OPT_THREADS, G_TYPE_UINT, videoscale->n_threads,
NULL);
if (videoscale->gamma_decode) {
gst_structure_set (options,
GST_VIDEO_CONVERTER_OPT_GAMMA_MODE, GST_TYPE_VIDEO_GAMMA_MODE,
GST_VIDEO_GAMMA_MODE_REMAP, NULL);
}
if (videoscale->convert)
gst_video_converter_free (videoscale->convert);
videoscale->convert = gst_video_converter_new (in_info, out_info, options);
}
GST_DEBUG_OBJECT (videoscale, "from=%dx%d (par=%d/%d dar=%d/%d), size %"
G_GSIZE_FORMAT " -> to=%dx%d (par=%d/%d dar=%d/%d borders=%d:%d), "
"size %" G_GSIZE_FORMAT,
in_info->width, in_info->height, in_info->par_n, in_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);
return TRUE;
}
static GstCaps *
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, };
GValue tpar = { 0, };
othercaps = gst_caps_truncate (othercaps);
othercaps = gst_caps_make_writable (othercaps);
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_val_if_fail (gst_value_is_fixed (from_par), othercaps);
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_round (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_round (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_round (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_round (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_round (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_round (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 dimensions with the DAR that was closest
* to the correct DAR. This changes the DAR but there's not much else to
* do here.
*/
if (set_w * ABS (set_h - h) < ABS (f_w - w) * f_h) {
f_h = set_h;
f_w = set_w;
}
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"));
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);
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_round (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_round (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:
othercaps = gst_caps_fixate (othercaps);
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);
return othercaps;
}
#define GET_LINE(frame, line) \
(gpointer)(((guint8*)(GST_VIDEO_FRAME_PLANE_DATA (frame, 0))) + \
GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0) * (line))
static GstFlowReturn
gst_video_scale_transform_frame (GstVideoFilter * filter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE_CAST (filter);
GstFlowReturn ret = GST_FLOW_OK;
GST_CAT_DEBUG_OBJECT (CAT_PERFORMANCE, filter, "doing video scaling");
gst_video_converter_frame (videoscale->convert, in_frame, out_frame);
return ret;
}
static gboolean
gst_video_scale_src_event (GstBaseTransform * trans, GstEvent * event)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE_CAST (trans);
GstVideoFilter *filter = GST_VIDEO_FILTER_CAST (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:
if (filter->in_info.width != filter->out_info.width ||
filter->in_info.height != filter->out_info.height) {
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 * filter->in_info.width / filter->out_info.width, NULL);
}
if (gst_structure_get_double (structure, "pointer_y", &a)) {
gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
a * filter->in_info.height / filter->out_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)
{
features_format_interlaced =
gst_caps_features_new (GST_CAPS_FEATURE_FORMAT_INTERLACED, NULL);
features_format_interlaced_sysmem =
gst_caps_features_copy (features_format_interlaced);
gst_caps_features_add (features_format_interlaced_sysmem,
GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY);
GST_DEBUG_CATEGORY_INIT (video_scale_debug, "videoscale", 0,
"videoscale element");
GST_DEBUG_CATEGORY_GET (CAT_PERFORMANCE, "GST_PERFORMANCE");
return GST_ELEMENT_REGISTER (videoscale, plugin);
}
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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