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gstreamer/subprojects/gst-plugins-base/gst/videoconvertscale/gstvideoconvertscale.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2005-2012 David Schleef <ds@schleef.org>
* Copyright (C) 2022 Thibault Saunier <tsaunier@igalia.com>
*
* 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-videoconvertscale
* @title: videoconvertscale
*
* This element resizes video frames and allows changing colorspace. 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 ! videoconvertscale ! autovideosink
* ]|
* Decode an Ogg/Theora and display the video. If the video sink chosen
* cannot perform scaling, the video scaling will be performed by videoconvertscale
* 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 ! videoconvertscale ! video/x-raw,width=100 ! autovideosink
* ]|
* Decode an Ogg/Theora and display the video with a width of 100.
*
* Since: 1.22
*/
/*
* 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 "gstvideoconvertscale.h"
typedef struct
{
/* properties */
GstVideoScaleMethod method;
gboolean add_borders;
double sharpness;
double sharpen;
int submethod;
double envelope;
gint n_threads;
GstVideoDitherMethod dither;
guint dither_quantization;
GstVideoResamplerMethod chroma_resampler;
GstVideoAlphaMode alpha_mode;
GstVideoChromaMode chroma_mode;
GstVideoMatrixMode matrix_mode;
GstVideoGammaMode gamma_mode;
GstVideoPrimariesMode primaries_mode;
gdouble alpha_value;
GstVideoConverter *convert;
gint borders_h;
gint borders_w;
} GstVideoConvertScalePrivate;
#define gst_video_convert_scale_parent_class parent_class
G_DEFINE_TYPE_WITH_PRIVATE (GstVideoConvertScale, gst_video_convert_scale,
GST_TYPE_VIDEO_FILTER);
GST_ELEMENT_REGISTER_DEFINE (videoconvertscale, "videoconvertscale",
GST_RANK_SECONDARY, GST_TYPE_VIDEO_CONVERT_SCALE);
#define PRIV(self) gst_video_convert_scale_get_instance_private(((GstVideoConvertScale*) self))
#define GST_CAT_DEFAULT video_convertscale_debug
GST_DEBUG_CATEGORY_STATIC (video_convertscale_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 GST_VIDEO_DITHER_BAYER
#define DEFAULT_PROP_ENVELOPE 2.0
#define DEFAULT_PROP_DITHER_QUANTIZATION 1
#define DEFAULT_PROP_CHROMA_RESAMPLER GST_VIDEO_RESAMPLER_METHOD_LINEAR
#define DEFAULT_PROP_ALPHA_MODE GST_VIDEO_ALPHA_MODE_COPY
#define DEFAULT_PROP_ALPHA_VALUE 1.0
#define DEFAULT_PROP_CHROMA_MODE GST_VIDEO_CHROMA_MODE_FULL
#define DEFAULT_PROP_MATRIX_MODE GST_VIDEO_MATRIX_MODE_FULL
#define DEFAULT_PROP_GAMMA_MODE GST_VIDEO_GAMMA_MODE_NONE
#define DEFAULT_PROP_PRIMARIES_MODE GST_VIDEO_PRIMARIES_MODE_NONE
#define DEFAULT_PROP_N_THREADS 1
static GQuark _colorspace_quark;
enum
{
PROP_0,
PROP_METHOD,
PROP_ADD_BORDERS,
PROP_SHARPNESS,
PROP_SHARPEN,
PROP_DITHER,
PROP_SUBMETHOD,
PROP_ENVELOPE,
PROP_N_THREADS,
PROP_DITHER_QUANTIZATION,
PROP_CHROMA_RESAMPLER,
PROP_ALPHA_MODE,
PROP_ALPHA_VALUE,
PROP_CHROMA_MODE,
PROP_MATRIX_MODE,
PROP_GAMMA_MODE,
PROP_PRIMARIES_MODE,
};
#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_convert_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_convert_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_convert_scale_format_caps);
g_once_init_leave (&inited, 1);
}
return caps;
}
static GstPadTemplate *
gst_video_convert_scale_src_template_factory (void)
{
return gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_video_convert_scale_get_capslist ());
}
static GstPadTemplate *
gst_video_convert_scale_sink_template_factory (void)
{
return gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_video_convert_scale_get_capslist ());
}
static void gst_video_convert_scale_finalize (GstVideoConvertScale * self);
static gboolean gst_video_convert_scale_src_event (GstBaseTransform * trans,
GstEvent * event);
/* base transform vmethods */
static GstCaps *gst_video_convert_scale_transform_caps (GstBaseTransform *
trans, GstPadDirection direction, GstCaps * caps, GstCaps * filter);
static GstCaps *gst_video_convert_scale_fixate_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
static gboolean gst_video_convert_scale_transform_meta (GstBaseTransform *
trans, GstBuffer * outbuf, GstMeta * meta, GstBuffer * inbuf);
static gboolean gst_video_convert_scale_set_info (GstVideoFilter * filter,
GstCaps * in, GstVideoInfo * in_info, GstCaps * out,
GstVideoInfo * out_info);
static GstFlowReturn gst_video_convert_scale_transform_frame (GstVideoFilter *
filter, GstVideoFrame * in, GstVideoFrame * out);
static void gst_video_convert_scale_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_video_convert_scale_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstCapsFeatures *features_format_interlaced,
*features_format_interlaced_sysmem;
static gboolean
gst_video_convert_scale_filter_meta (GstBaseTransform * trans, GstQuery * query,
GType api, const GstStructure * params)
{
/* This element cannot passthrough the crop meta, because it would convert the
* wrong sub-region of the image, and worst, our output image may not be large
* enough for the crop to be applied later */
if (api == GST_VIDEO_CROP_META_API_TYPE)
return FALSE;
/* propose all other metadata upstream */
return TRUE;
}
static void
gst_video_convert_scale_class_init (GstVideoConvertScaleClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = (GstElementClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
GstVideoFilterClass *filter_class = (GstVideoFilterClass *) klass;
GST_DEBUG_CATEGORY_INIT (video_convertscale_debug, "videoconvertscale", 0,
"videoconvertscale element");
GST_DEBUG_CATEGORY_GET (CAT_PERFORMANCE, "GST_PERFORMANCE");
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);
_colorspace_quark = g_quark_from_static_string ("colorspace");
gobject_class->finalize =
(GObjectFinalizeFunc) gst_video_convert_scale_finalize;
gobject_class->set_property = gst_video_convert_scale_set_property;
gobject_class->get_property = gst_video_convert_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_enum ("dither", "Dither", "Apply dithering while converting",
gst_video_dither_method_get_type (), DEFAULT_PROP_DITHER,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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_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));
g_object_class_install_property (gobject_class, PROP_DITHER_QUANTIZATION,
g_param_spec_uint ("dither-quantization", "Dither Quantize",
"Quantizer to use", 0, G_MAXUINT, DEFAULT_PROP_DITHER_QUANTIZATION,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CHROMA_RESAMPLER,
g_param_spec_enum ("chroma-resampler", "Chroma resampler",
"Chroma resampler method", gst_video_resampler_method_get_type (),
DEFAULT_PROP_CHROMA_RESAMPLER,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ALPHA_MODE,
g_param_spec_enum ("alpha-mode", "Alpha Mode",
"Alpha Mode to use", gst_video_alpha_mode_get_type (),
DEFAULT_PROP_ALPHA_MODE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ALPHA_VALUE,
g_param_spec_double ("alpha-value", "Alpha Value",
"Alpha Value to use", 0.0, 1.0,
DEFAULT_PROP_ALPHA_VALUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CHROMA_MODE,
g_param_spec_enum ("chroma-mode", "Chroma Mode", "Chroma Resampling Mode",
gst_video_chroma_mode_get_type (), DEFAULT_PROP_CHROMA_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MATRIX_MODE,
g_param_spec_enum ("matrix-mode", "Matrix Mode", "Matrix Conversion Mode",
gst_video_matrix_mode_get_type (), DEFAULT_PROP_MATRIX_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_GAMMA_MODE,
g_param_spec_enum ("gamma-mode", "Gamma Mode", "Gamma Conversion Mode",
gst_video_gamma_mode_get_type (), DEFAULT_PROP_GAMMA_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PRIMARIES_MODE,
g_param_spec_enum ("primaries-mode", "Primaries Mode",
"Primaries Conversion Mode", gst_video_primaries_mode_get_type (),
DEFAULT_PROP_PRIMARIES_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (element_class,
"Video colorspace converter and scaler",
"Filter/Converter/Video/Scaler/Colorspace",
"Resizes video and converts from one colorspace to another",
"Wim Taymans <wim.taymans@gmail.com>");
gst_element_class_add_pad_template (element_class,
gst_video_convert_scale_sink_template_factory ());
gst_element_class_add_pad_template (element_class,
gst_video_convert_scale_src_template_factory ());
_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);
trans_class->transform_caps =
GST_DEBUG_FUNCPTR (gst_video_convert_scale_transform_caps);
trans_class->fixate_caps =
GST_DEBUG_FUNCPTR (gst_video_convert_scale_fixate_caps);
trans_class->filter_meta =
GST_DEBUG_FUNCPTR (gst_video_convert_scale_filter_meta);
trans_class->src_event =
GST_DEBUG_FUNCPTR (gst_video_convert_scale_src_event);
trans_class->transform_meta =
GST_DEBUG_FUNCPTR (gst_video_convert_scale_transform_meta);
filter_class->set_info = GST_DEBUG_FUNCPTR (gst_video_convert_scale_set_info);
filter_class->transform_frame =
GST_DEBUG_FUNCPTR (gst_video_convert_scale_transform_frame);
klass->any_memory = FALSE;
klass->converts = TRUE;
klass->scales = TRUE;
gst_type_mark_as_plugin_api (GST_TYPE_VIDEO_CONVERT_SCALE, 0);
}
static void
gst_video_convert_scale_init (GstVideoConvertScale * self)
{
GstVideoConvertScalePrivate *priv = PRIV (self);
priv->method = DEFAULT_PROP_METHOD;
priv->add_borders = DEFAULT_PROP_ADD_BORDERS;
priv->sharpness = DEFAULT_PROP_SHARPNESS;
priv->sharpen = DEFAULT_PROP_SHARPEN;
priv->envelope = DEFAULT_PROP_ENVELOPE;
priv->n_threads = DEFAULT_PROP_N_THREADS;
priv->dither = DEFAULT_PROP_DITHER;
priv->dither_quantization = DEFAULT_PROP_DITHER_QUANTIZATION;
priv->chroma_resampler = DEFAULT_PROP_CHROMA_RESAMPLER;
priv->alpha_mode = DEFAULT_PROP_ALPHA_MODE;
priv->alpha_value = DEFAULT_PROP_ALPHA_VALUE;
priv->chroma_mode = DEFAULT_PROP_CHROMA_MODE;
priv->matrix_mode = DEFAULT_PROP_MATRIX_MODE;
priv->gamma_mode = DEFAULT_PROP_GAMMA_MODE;
priv->primaries_mode = DEFAULT_PROP_PRIMARIES_MODE;
}
static void
gst_video_convert_scale_finalize (GstVideoConvertScale * self)
{
GstVideoConvertScalePrivate *priv = PRIV (self);
if (priv->convert)
gst_video_converter_free (priv->convert);
G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT (self));
}
static void
gst_video_convert_scale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoConvertScalePrivate *priv = PRIV (object);
GST_OBJECT_LOCK (object);
switch (prop_id) {
case PROP_METHOD:
priv->method = g_value_get_enum (value);
break;
case PROP_ADD_BORDERS:
priv->add_borders = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (object);
gst_base_transform_reconfigure_src (GST_BASE_TRANSFORM_CAST (object));
return;
case PROP_SHARPNESS:
priv->sharpness = g_value_get_double (value);
break;
case PROP_SHARPEN:
priv->sharpen = g_value_get_double (value);
break;
case PROP_SUBMETHOD:
priv->submethod = g_value_get_int (value);
break;
case PROP_ENVELOPE:
priv->envelope = g_value_get_double (value);
break;
case PROP_N_THREADS:
priv->n_threads = g_value_get_uint (value);
break;
case PROP_DITHER:
priv->dither = g_value_get_enum (value);
break;
case PROP_CHROMA_RESAMPLER:
priv->chroma_resampler = g_value_get_enum (value);
break;
case PROP_ALPHA_MODE:
priv->alpha_mode = g_value_get_enum (value);
break;
case PROP_ALPHA_VALUE:
priv->alpha_value = g_value_get_double (value);
break;
case PROP_CHROMA_MODE:
priv->chroma_mode = g_value_get_enum (value);
break;
case PROP_MATRIX_MODE:
priv->matrix_mode = g_value_get_enum (value);
break;
case PROP_GAMMA_MODE:
priv->gamma_mode = g_value_get_enum (value);
break;
case PROP_PRIMARIES_MODE:
priv->primaries_mode = g_value_get_enum (value);
break;
case PROP_DITHER_QUANTIZATION:
priv->dither_quantization = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (object);
}
static void
gst_video_convert_scale_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstVideoConvertScalePrivate *priv = PRIV (object);
GST_OBJECT_LOCK (object);
switch (prop_id) {
case PROP_METHOD:
g_value_set_enum (value, priv->method);
break;
case PROP_ADD_BORDERS:
g_value_set_boolean (value, priv->add_borders);
break;
case PROP_SHARPNESS:
g_value_set_double (value, priv->sharpness);
break;
case PROP_SHARPEN:
g_value_set_double (value, priv->sharpen);
break;
case PROP_SUBMETHOD:
g_value_set_int (value, priv->submethod);
break;
case PROP_ENVELOPE:
g_value_set_double (value, priv->envelope);
break;
case PROP_N_THREADS:
g_value_set_uint (value, priv->n_threads);
break;
case PROP_DITHER:
g_value_set_enum (value, priv->dither);
break;
case PROP_CHROMA_RESAMPLER:
g_value_set_enum (value, priv->chroma_resampler);
break;
case PROP_ALPHA_MODE:
g_value_set_enum (value, priv->alpha_mode);
break;
case PROP_ALPHA_VALUE:
g_value_set_double (value, priv->alpha_value);
break;
case PROP_CHROMA_MODE:
g_value_set_enum (value, priv->chroma_mode);
break;
case PROP_MATRIX_MODE:
g_value_set_enum (value, priv->matrix_mode);
break;
case PROP_GAMMA_MODE:
g_value_set_enum (value, priv->gamma_mode);
break;
case PROP_PRIMARIES_MODE:
g_value_set_enum (value, priv->primaries_mode);
break;
case PROP_DITHER_QUANTIZATION:
g_value_set_uint (value, priv->dither_quantization);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (object);
}
static GstCaps *
gst_video_convert_caps_remove_format_and_rangify_size_info (GstVideoConvertScale
* self, GstCaps * caps)
{
GstVideoConvertScaleClass *klass = GST_VIDEO_CONVERT_SCALE_GET_CLASS (self);
GstCaps *ret;
GstStructure *structure;
GstCapsFeatures *features;
gint i, n;
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;
structure = gst_structure_copy (structure);
/* Only remove format info for the cases when we can actually convert */
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))) {
if (klass->scales) {
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);
}
}
if (klass->converts) {
gst_structure_remove_fields (structure, "format", "colorimetry",
"chroma-site", NULL);
}
}
gst_caps_append_structure_full (ret, structure,
gst_caps_features_copy (features));
}
return ret;
}
static GstCaps *
gst_video_convert_scale_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
{
GstVideoConvertScale *self = GST_VIDEO_CONVERT_SCALE (trans);
gint i;
GstCaps *ret;
GST_DEBUG_OBJECT (trans,
"Transforming caps %" GST_PTR_FORMAT " in direction %s", caps,
(direction == GST_PAD_SINK) ? "sink" : "src");
ret = gst_video_convert_caps_remove_format_and_rangify_size_info (self, caps);
if (filter) {
GstCaps *intersection;
intersection =
gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (ret);
ret = intersection;
}
if (GST_VIDEO_CONVERT_SCALE_GET_CLASS (trans)->any_memory)
return ret;
for (i = 0; i < gst_caps_get_size (ret); i++) {
gint j;
GstCapsFeatures *f = gst_caps_get_features (ret, i);
if (!f || gst_caps_features_is_any (f) ||
gst_caps_features_is_equal (f, GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))
continue;
for (j = 0; j < gst_caps_features_get_size (f); j++) {
const gchar *feature = gst_caps_features_get_nth (f, j);
if (g_str_has_prefix (feature, "memory:")) {
GST_DEBUG_OBJECT (trans, "Can not work with memory `%s`", feature);
gst_caps_remove_structure (ret, i);
break;
}
}
}
GST_DEBUG_OBJECT (trans, "returning caps: %" GST_PTR_FORMAT, ret);
return ret;
}
static gboolean
gst_video_convert_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_ORIENTATION_STR,
GST_META_TAG_VIDEO_SIZE_STR,
NULL
};
tags = gst_meta_api_type_get_tags (info->api);
/* No specific tags, we are good to copy */
if (!tags) {
return TRUE;
}
if (gst_meta_api_type_has_tag (info->api, _colorspace_quark)) {
/* don't copy colorspace specific metadata, FIXME, we need a MetaTransform
* for the colorspace metadata. */
return FALSE;
}
/* 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)
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_convert_scale_set_info (GstVideoFilter * filter, GstCaps * in,
GstVideoInfo * in_info, GstCaps * out, GstVideoInfo * out_info)
{
GstVideoConvertScale *self = GST_VIDEO_CONVERT_SCALE (filter);
GstVideoConvertScalePrivate *priv = PRIV (self);
gint from_dar_n, from_dar_d, to_dar_n, to_dar_d;
GstVideoInfo tmp_info;
if (priv->convert) {
gst_video_converter_free (priv->convert);
priv->convert = NULL;
}
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;
}
priv->borders_w = priv->borders_h = 0;
if (to_dar_n != from_dar_n || to_dar_d != from_dar_d) {
if (priv->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) {
priv->borders_h = out_info->height - to_h;
priv->borders_w = 0;
} else {
to_w = gst_util_uint64_scale_int (out_info->height, n, d);
g_assert (to_w <= out_info->width);
priv->borders_h = 0;
priv->borders_w = out_info->width - to_w;
}
} else {
GST_WARNING_OBJECT (self, "Can't calculate borders");
}
} else {
GST_WARNING_OBJECT (self, "Can't keep DAR!");
}
}
/* if present, these must match */
if (in_info->interlace_mode != out_info->interlace_mode)
goto format_mismatch;
/* if the only thing different in the caps is the transfer function, and
* we're converting between equivalent transfer functions, do passthrough */
tmp_info = *in_info;
tmp_info.colorimetry.transfer = out_info->colorimetry.transfer;
if (gst_video_info_is_equal (&tmp_info, out_info) &&
gst_video_transfer_function_is_equivalent (in_info->colorimetry.transfer,
in_info->finfo->bits, out_info->colorimetry.transfer,
out_info->finfo->bits)) {
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 ("videoconvertscale");
switch (priv->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, priv->envelope,
GST_VIDEO_RESAMPLER_OPT_SHARPNESS, G_TYPE_DOUBLE, priv->sharpness,
GST_VIDEO_RESAMPLER_OPT_SHARPEN, G_TYPE_DOUBLE, priv->sharpen,
GST_VIDEO_CONVERTER_OPT_DEST_X, G_TYPE_INT, priv->borders_w / 2,
GST_VIDEO_CONVERTER_OPT_DEST_Y, G_TYPE_INT, priv->borders_h / 2,
GST_VIDEO_CONVERTER_OPT_DEST_WIDTH, G_TYPE_INT,
out_info->width - priv->borders_w, GST_VIDEO_CONVERTER_OPT_DEST_HEIGHT,
G_TYPE_INT, out_info->height - priv->borders_h,
GST_VIDEO_CONVERTER_OPT_DITHER_METHOD, GST_TYPE_VIDEO_DITHER_METHOD,
priv->dither, GST_VIDEO_CONVERTER_OPT_DITHER_QUANTIZATION, G_TYPE_UINT,
priv->dither_quantization,
GST_VIDEO_CONVERTER_OPT_CHROMA_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, priv->chroma_resampler,
GST_VIDEO_CONVERTER_OPT_ALPHA_MODE, GST_TYPE_VIDEO_ALPHA_MODE,
priv->alpha_mode, GST_VIDEO_CONVERTER_OPT_ALPHA_VALUE, G_TYPE_DOUBLE,
priv->alpha_value, GST_VIDEO_CONVERTER_OPT_CHROMA_MODE,
GST_TYPE_VIDEO_CHROMA_MODE, priv->chroma_mode,
GST_VIDEO_CONVERTER_OPT_MATRIX_MODE, GST_TYPE_VIDEO_MATRIX_MODE,
priv->matrix_mode, GST_VIDEO_CONVERTER_OPT_GAMMA_MODE,
GST_TYPE_VIDEO_GAMMA_MODE, priv->gamma_mode,
GST_VIDEO_CONVERTER_OPT_PRIMARIES_MODE, GST_TYPE_VIDEO_PRIMARIES_MODE,
priv->primaries_mode, GST_VIDEO_CONVERTER_OPT_THREADS, G_TYPE_UINT,
priv->n_threads, NULL);
priv->convert = gst_video_converter_new (in_info, out_info, options);
if (priv->convert == NULL)
goto no_convert;
}
GST_DEBUG_OBJECT (filter, "converting format %s -> %s",
gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (in_info)),
gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (out_info)));
GST_DEBUG_OBJECT (self, "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,
priv->borders_w, priv->borders_h, out_info->size);
return TRUE;
/* ERRORS */
format_mismatch:
{
GST_ERROR_OBJECT (self, "input and output formats do not match");
return FALSE;
}
no_convert:
{
GST_ERROR_OBJECT (self, "could not create converter");
return FALSE;
}
}
/*
* This is an incomplete matrix of in formats and a score for the preferred output
* format.
*
* out: RGB24 RGB16 ARGB AYUV YUV444 YUV422 YUV420 YUV411 YUV410 PAL GRAY
* in
* RGB24 0 2 1 2 2 3 4 5 6 7 8
* RGB16 1 0 1 2 2 3 4 5 6 7 8
* ARGB 2 3 0 1 4 5 6 7 8 9 10
* AYUV 3 4 1 0 2 5 6 7 8 9 10
* YUV444 2 4 3 1 0 5 6 7 8 9 10
* YUV422 3 5 4 2 1 0 6 7 8 9 10
* YUV420 4 6 5 3 2 1 0 7 8 9 10
* YUV411 4 6 5 3 2 1 7 0 8 9 10
* YUV410 6 8 7 5 4 3 2 1 0 9 10
* PAL 1 3 2 6 4 6 7 8 9 0 10
* GRAY 1 4 3 2 1 5 6 7 8 9 0
*
* PAL or GRAY are never preferred, if we can we would convert to PAL instead
* of GRAY, though
* less subsampling is preferred and if any, preferably horizontal
* We would like to keep the alpha, even if we would need to to colorspace conversion
* or lose depth.
*/
#define SCORE_FORMAT_CHANGE 1
#define SCORE_DEPTH_CHANGE 1
#define SCORE_ALPHA_CHANGE 1
#define SCORE_CHROMA_W_CHANGE 1
#define SCORE_CHROMA_H_CHANGE 1
#define SCORE_PALETTE_CHANGE 1
#define SCORE_COLORSPACE_LOSS 2 /* RGB <-> YUV */
#define SCORE_DEPTH_LOSS 4 /* change bit depth */
#define SCORE_ALPHA_LOSS 8 /* lose the alpha channel */
#define SCORE_CHROMA_W_LOSS 16 /* vertical subsample */
#define SCORE_CHROMA_H_LOSS 32 /* horizontal subsample */
#define SCORE_PALETTE_LOSS 64 /* convert to palette format */
#define SCORE_COLOR_LOSS 128 /* convert to GRAY */
#define COLORSPACE_MASK (GST_VIDEO_FORMAT_FLAG_YUV | \
GST_VIDEO_FORMAT_FLAG_RGB | GST_VIDEO_FORMAT_FLAG_GRAY)
#define ALPHA_MASK (GST_VIDEO_FORMAT_FLAG_ALPHA)
#define PALETTE_MASK (GST_VIDEO_FORMAT_FLAG_PALETTE)
/* calculate how much loss a conversion would be */
static void
score_value (GstBaseTransform * base, const GstVideoFormatInfo * in_info,
const GValue * val, gint * min_loss, const GstVideoFormatInfo ** out_info)
{
const gchar *fname;
const GstVideoFormatInfo *t_info;
GstVideoFormatFlags in_flags, t_flags;
gint loss;
fname = g_value_get_string (val);
t_info = gst_video_format_get_info (gst_video_format_from_string (fname));
if (!t_info || t_info->format == GST_VIDEO_FORMAT_UNKNOWN)
return;
/* accept input format immediately without loss */
if (in_info == t_info) {
*min_loss = 0;
*out_info = t_info;
return;
}
loss = SCORE_FORMAT_CHANGE;
in_flags = GST_VIDEO_FORMAT_INFO_FLAGS (in_info);
in_flags &= ~GST_VIDEO_FORMAT_FLAG_LE;
in_flags &= ~GST_VIDEO_FORMAT_FLAG_COMPLEX;
in_flags &= ~GST_VIDEO_FORMAT_FLAG_UNPACK;
t_flags = GST_VIDEO_FORMAT_INFO_FLAGS (t_info);
t_flags &= ~GST_VIDEO_FORMAT_FLAG_LE;
t_flags &= ~GST_VIDEO_FORMAT_FLAG_COMPLEX;
t_flags &= ~GST_VIDEO_FORMAT_FLAG_UNPACK;
if ((t_flags & PALETTE_MASK) != (in_flags & PALETTE_MASK)) {
loss += SCORE_PALETTE_CHANGE;
if (t_flags & PALETTE_MASK)
loss += SCORE_PALETTE_LOSS;
}
if ((t_flags & COLORSPACE_MASK) != (in_flags & COLORSPACE_MASK)) {
loss += SCORE_COLORSPACE_LOSS;
if (t_flags & GST_VIDEO_FORMAT_FLAG_GRAY)
loss += SCORE_COLOR_LOSS;
}
if ((t_flags & ALPHA_MASK) != (in_flags & ALPHA_MASK)) {
loss += SCORE_ALPHA_CHANGE;
if (in_flags & ALPHA_MASK)
loss += SCORE_ALPHA_LOSS;
}
if ((in_info->h_sub[1]) != (t_info->h_sub[1])) {
loss += SCORE_CHROMA_H_CHANGE;
if ((in_info->h_sub[1]) < (t_info->h_sub[1]))
loss += SCORE_CHROMA_H_LOSS;
}
if ((in_info->w_sub[1]) != (t_info->w_sub[1])) {
loss += SCORE_CHROMA_W_CHANGE;
if ((in_info->w_sub[1]) < (t_info->w_sub[1]))
loss += SCORE_CHROMA_W_LOSS;
}
if ((in_info->bits) != (t_info->bits)) {
loss += SCORE_DEPTH_CHANGE;
if ((in_info->bits) > (t_info->bits))
loss += SCORE_DEPTH_LOSS;
}
GST_DEBUG_OBJECT (base, "score %s -> %s = %d",
GST_VIDEO_FORMAT_INFO_NAME (in_info),
GST_VIDEO_FORMAT_INFO_NAME (t_info), loss);
if (loss < *min_loss) {
GST_DEBUG_OBJECT (base, "found new best %d", loss);
*out_info = t_info;
*min_loss = loss;
}
}
static void
gst_video_convert_scale_fixate_format (GstBaseTransform * base, GstCaps * caps,
GstCaps * result)
{
GstStructure *ins, *outs;
const gchar *in_format;
const GstVideoFormatInfo *in_info, *out_info = NULL;
gint min_loss = G_MAXINT;
guint i, capslen;
ins = gst_caps_get_structure (caps, 0);
in_format = gst_structure_get_string (ins, "format");
if (!in_format)
return;
GST_DEBUG_OBJECT (base, "source format %s", in_format);
in_info =
gst_video_format_get_info (gst_video_format_from_string (in_format));
if (!in_info)
return;
outs = gst_caps_get_structure (result, 0);
capslen = gst_caps_get_size (result);
GST_DEBUG_OBJECT (base, "iterate %d structures", capslen);
for (i = 0; i < capslen; i++) {
GstStructure *tests;
const GValue *format;
tests = gst_caps_get_structure (result, i);
format = gst_structure_get_value (tests, "format");
gst_structure_remove_fields (tests, "height", "width", "pixel-aspect-ratio",
"display-aspect-ratio", NULL);
/* should not happen */
if (format == NULL)
continue;
if (GST_VALUE_HOLDS_LIST (format)) {
gint j, len;
len = gst_value_list_get_size (format);
GST_DEBUG_OBJECT (base, "have %d formats", len);
for (j = 0; j < len; j++) {
const GValue *val;
val = gst_value_list_get_value (format, j);
if (G_VALUE_HOLDS_STRING (val)) {
score_value (base, in_info, val, &min_loss, &out_info);
if (min_loss == 0)
break;
}
}
} else if (G_VALUE_HOLDS_STRING (format)) {
score_value (base, in_info, format, &min_loss, &out_info);
}
}
if (out_info)
gst_structure_set (outs, "format", G_TYPE_STRING,
GST_VIDEO_FORMAT_INFO_NAME (out_info), NULL);
}
static gboolean
subsampling_unchanged (GstVideoInfo * in_info, GstVideoInfo * out_info)
{
gint i;
const GstVideoFormatInfo *in_format, *out_format;
if (GST_VIDEO_INFO_N_COMPONENTS (in_info) !=
GST_VIDEO_INFO_N_COMPONENTS (out_info))
return FALSE;
in_format = in_info->finfo;
out_format = out_info->finfo;
for (i = 0; i < GST_VIDEO_INFO_N_COMPONENTS (in_info); i++) {
if (GST_VIDEO_FORMAT_INFO_W_SUB (in_format,
i) != GST_VIDEO_FORMAT_INFO_W_SUB (out_format, i))
return FALSE;
if (GST_VIDEO_FORMAT_INFO_H_SUB (in_format,
i) != GST_VIDEO_FORMAT_INFO_H_SUB (out_format, i))
return FALSE;
}
return TRUE;
}
static void
transfer_colorimetry_from_input (GstBaseTransform * trans, GstCaps * in_caps,
GstCaps * out_caps)
{
GstStructure *out_caps_s = gst_caps_get_structure (out_caps, 0);
GstStructure *in_caps_s = gst_caps_get_structure (in_caps, 0);
gboolean have_colorimetry =
gst_structure_has_field (out_caps_s, "colorimetry");
gboolean have_chroma_site =
gst_structure_has_field (out_caps_s, "chroma-site");
/* If the output already has colorimetry and chroma-site, stop,
* otherwise try and transfer what we can from the input caps */
if (have_colorimetry && have_chroma_site)
return;
{
GstVideoInfo in_info, out_info;
const GValue *in_colorimetry =
gst_structure_get_value (in_caps_s, "colorimetry");
GstCaps *tmp_caps = NULL;
GstStructure *tmp_caps_s;
if (!gst_video_info_from_caps (&in_info, in_caps)) {
GST_WARNING_OBJECT (trans,
"Failed to convert sink pad caps to video info");
return;
}
/* We are before fixate_size(), the width and height of
the output caps may be absent or not fixed. */
tmp_caps = gst_caps_copy (out_caps);
tmp_caps = gst_caps_fixate (tmp_caps);
tmp_caps_s = gst_caps_get_structure (tmp_caps, 0);
if (!gst_structure_has_field (tmp_caps_s, "width"))
gst_structure_set_value (tmp_caps_s, "width",
gst_structure_get_value (in_caps_s, "width"));
if (!gst_structure_has_field (tmp_caps_s, "height"))
gst_structure_set_value (tmp_caps_s, "height",
gst_structure_get_value (in_caps_s, "height"));
if (!gst_video_info_from_caps (&out_info, tmp_caps)) {
gst_clear_caps (&tmp_caps);
GST_WARNING_OBJECT (trans,
"Failed to convert src pad caps to video info");
return;
}
gst_clear_caps (&tmp_caps);
if (!have_colorimetry && in_colorimetry != NULL) {
if ((GST_VIDEO_INFO_IS_YUV (&out_info)
&& GST_VIDEO_INFO_IS_YUV (&in_info))
|| (GST_VIDEO_INFO_IS_RGB (&out_info)
&& GST_VIDEO_INFO_IS_RGB (&in_info))
|| (GST_VIDEO_INFO_IS_GRAY (&out_info)
&& GST_VIDEO_INFO_IS_GRAY (&in_info))) {
/* Can transfer the colorimetry intact from the input if it has it */
gst_structure_set_value (out_caps_s, "colorimetry", in_colorimetry);
} else {
gchar *colorimetry_str;
/* Changing between YUV/RGB - forward primaries and transfer function, but use
* default range and matrix.
* the primaries is used for conversion between RGB and XYZ (CIE 1931 coordinate).
* the transfer function could be another reference (e.g., HDR)
*/
out_info.colorimetry.primaries = in_info.colorimetry.primaries;
out_info.colorimetry.transfer = in_info.colorimetry.transfer;
colorimetry_str =
gst_video_colorimetry_to_string (&out_info.colorimetry);
gst_caps_set_simple (out_caps, "colorimetry", G_TYPE_STRING,
colorimetry_str, NULL);
g_free (colorimetry_str);
}
}
/* Only YUV output needs chroma-site. If the input was also YUV and had the same chroma
* subsampling, transfer the siting. If the sub-sampling is changing, then the planes get
* scaled anyway so there's no real reason to prefer the input siting. */
if (!have_chroma_site && GST_VIDEO_INFO_IS_YUV (&out_info)) {
if (GST_VIDEO_INFO_IS_YUV (&in_info)) {
const GValue *in_chroma_site =
gst_structure_get_value (in_caps_s, "chroma-site");
if (in_chroma_site != NULL
&& subsampling_unchanged (&in_info, &out_info))
gst_structure_set_value (out_caps_s, "chroma-site", in_chroma_site);
}
}
}
}
static GstCaps *
gst_video_convert_scale_get_fixed_format (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstCaps *result;
result = gst_caps_intersect (othercaps, caps);
if (gst_caps_is_empty (result)) {
gst_caps_unref (result);
result = gst_caps_copy (othercaps);
}
result = gst_caps_make_writable (result);
gst_video_convert_scale_fixate_format (trans, caps, result);
/* fixate remaining fields */
result = gst_caps_fixate (result);
if (direction == GST_PAD_SINK) {
if (gst_caps_is_subset (caps, result)) {
gst_caps_replace (&result, caps);
} else {
/* Try and preserve input colorimetry / chroma information */
transfer_colorimetry_from_input (trans, caps, result);
}
}
return result;
}
static GstCaps *
gst_video_convert_scale_fixate_size (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);
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;
}
static GstCaps *
gst_video_convert_scale_fixate_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstCaps *format;
GST_DEBUG_OBJECT (base,
"trying to fixate othercaps %" GST_PTR_FORMAT " based on caps %"
GST_PTR_FORMAT, othercaps, caps);
format = gst_video_convert_scale_get_fixed_format (base, direction, caps,
othercaps);
if (gst_caps_is_empty (format)) {
GST_ERROR_OBJECT (base, "Could not convert formats");
return format;
}
othercaps =
gst_video_convert_scale_fixate_size (base, direction, caps, othercaps);
if (gst_caps_get_size (othercaps) == 1) {
gint i;
const gchar *format_fields[] = { "format", "colorimetry", "chroma-site" };
GstStructure *format_struct = gst_caps_get_structure (format, 0);
GstStructure *fixated_struct;
othercaps = gst_caps_make_writable (othercaps);
fixated_struct = gst_caps_get_structure (othercaps, 0);
for (i = 0; i < G_N_ELEMENTS (format_fields); i++) {
if (gst_structure_has_field (format_struct, format_fields[i])) {
gst_structure_set (fixated_struct, format_fields[i], G_TYPE_STRING,
gst_structure_get_string (format_struct, format_fields[i]), NULL);
} else {
gst_structure_remove_field (fixated_struct, format_fields[i]);
}
}
}
gst_caps_unref (format);
GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, othercaps);
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_convert_scale_transform_frame (GstVideoFilter * filter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
GstVideoConvertScalePrivate *priv = PRIV (filter);
GstFlowReturn ret = GST_FLOW_OK;
GST_CAT_DEBUG_OBJECT (CAT_PERFORMANCE, filter, "doing video scaling");
gst_video_converter_frame (priv->convert, in_frame, out_frame);
return ret;
}
static gboolean
gst_video_convert_scale_src_event (GstBaseTransform * trans, GstEvent * event)
{
GstVideoConvertScale *self = GST_VIDEO_CONVERT_SCALE_CAST (trans);
GstVideoFilter *filter = GST_VIDEO_FILTER_CAST (trans);
gboolean ret;
gdouble x, y;
GST_DEBUG_OBJECT (self, "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_make_writable (event);
if (gst_navigation_event_get_coordinates (event, &x, &y)) {
gst_navigation_event_set_coordinates (event,
x * filter->in_info.width / filter->out_info.width,
y * filter->in_info.height / filter->out_info.height);
}
}
break;
default:
break;
}
ret = GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans, event);
return ret;
}
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