/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) 2005-2012 David Schleef * * 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 * @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 -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoconvert ! videoscale ! ximagesink * ]| Decode an Ogg/Theora and display the video using ximagesink. Since * ximagesink cannot perform scaling, the video scaling will be performed by * videoscale when you resize the video window. * To create the test Ogg/Theora file refer to the documentation of theoraenc. * |[ * gst-launch -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoscale ! video/x-raw, width=50 ! xvimagesink * ]| Decode an Ogg/Theora and display the video using xvimagesink with a width * of 50. * */ /* * 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 #include #include #include #include "gstvideoscale.h" /* debug variable definition */ GST_DEBUG_CATEGORY (video_scale_debug); GST_DEBUG_CATEGORY_STATIC (GST_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 enum { PROP_0, PROP_METHOD, PROP_ADD_BORDERS, PROP_SHARPNESS, PROP_SHARPEN, PROP_DITHER, PROP_SUBMETHOD, PROP_ENVELOPE, PROP_GAMMA_DECODE, }; #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)); #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-sinc"}, {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 volatile 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_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); 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)); gst_element_class_set_static_metadata (element_class, "Video scaler", "Filter/Converter/Video/Scaler", "Resizes video", "Wim Taymans "); 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); filter_class->set_info = GST_DEBUG_FUNCPTR (gst_video_scale_set_info); filter_class->transform_frame = GST_DEBUG_FUNCPTR (gst_video_scale_transform_frame); } 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; } 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; 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; 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_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_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 (GST_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, NULL); if (videoscale->gamma_decode) { gst_structure_set (options, GST_VIDEO_CONVERTER_OPT_GAMMA_MODE, G_TYPE_STRING, "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, }, 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 (h, num, den); gst_structure_fixate_field_nearest_int (outs, "width", w); goto done; } /* The PAR is not fixed and it's quite likely that we can set * an arbitrary PAR. */ /* Check if we can keep the input width */ tmp = gst_structure_copy (outs); gst_structure_fixate_field_nearest_int (tmp, "width", from_w); gst_structure_get_int (tmp, "width", &set_w); /* Might have failed but try to keep the DAR nonetheless by * adjusting the PAR */ if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, h, set_w, &to_par_n, &to_par_d)) { GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL), ("Error calculating the output scaled size - integer overflow")); gst_structure_free (tmp); goto done; } if (!gst_structure_has_field (tmp, "pixel-aspect-ratio")) gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par); gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio", to_par_n, to_par_d); gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n, &set_par_d); gst_structure_free (tmp); /* Check if the adjusted PAR is accepted */ if (set_par_n == to_par_n && set_par_d == to_par_d) { if (gst_structure_has_field (outs, "pixel-aspect-ratio") || set_par_n != set_par_d) gst_structure_set (outs, "width", G_TYPE_INT, set_w, "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, NULL); goto done; } /* Otherwise scale the width to the new PAR and check if the * adjusted with is accepted. If all that fails we can't keep * the DAR */ if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d, set_par_n, &num, &den)) { GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL), ("Error calculating the output scaled size - integer overflow")); goto done; } w = (guint) gst_util_uint64_scale_int (h, num, den); gst_structure_fixate_field_nearest_int (outs, "width", w); if (gst_structure_has_field (outs, "pixel-aspect-ratio") || set_par_n != set_par_d) gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, NULL); goto done; } else if (w) { GstStructure *tmp; gint set_h, set_par_n, set_par_d; GST_DEBUG_OBJECT (base, "width is fixed (%d)", w); /* If the PAR is fixed too, there's not much to do * except choosing the height that is nearest to the * height with the same DAR */ if (gst_value_is_fixed (to_par)) { to_par_n = gst_value_get_fraction_numerator (to_par); to_par_d = gst_value_get_fraction_denominator (to_par); GST_DEBUG_OBJECT (base, "PAR is fixed %d/%d", to_par_n, to_par_d); if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d, to_par_n, &num, &den)) { GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL), ("Error calculating the output scaled size - integer overflow")); goto done; } h = (guint) gst_util_uint64_scale_int (w, den, num); gst_structure_fixate_field_nearest_int (outs, "height", h); goto done; } /* The PAR is not fixed and it's quite likely that we can set * an arbitrary PAR. */ /* Check if we can keep the input height */ tmp = gst_structure_copy (outs); gst_structure_fixate_field_nearest_int (tmp, "height", from_h); gst_structure_get_int (tmp, "height", &set_h); /* Might have failed but try to keep the DAR nonetheless by * adjusting the PAR */ if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, w, &to_par_n, &to_par_d)) { GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL), ("Error calculating the output scaled size - integer overflow")); gst_structure_free (tmp); goto done; } if (!gst_structure_has_field (tmp, "pixel-aspect-ratio")) gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par); gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio", to_par_n, to_par_d); gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n, &set_par_d); gst_structure_free (tmp); /* Check if the adjusted PAR is accepted */ if (set_par_n == to_par_n && set_par_d == to_par_d) { if (gst_structure_has_field (outs, "pixel-aspect-ratio") || set_par_n != set_par_d) gst_structure_set (outs, "height", G_TYPE_INT, set_h, "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, NULL); goto done; } /* Otherwise scale the height to the new PAR and check if the * adjusted with is accepted. If all that fails we can't keep * the DAR */ if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d, set_par_n, &num, &den)) { GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL), ("Error calculating the output scaled size - integer overflow")); goto done; } h = (guint) gst_util_uint64_scale_int (w, den, num); gst_structure_fixate_field_nearest_int (outs, "height", h); if (gst_structure_has_field (outs, "pixel-aspect-ratio") || set_par_n != set_par_d) gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, NULL); goto done; } else if (gst_value_is_fixed (to_par)) { GstStructure *tmp; gint set_h, set_w, f_h, f_w; to_par_n = gst_value_get_fraction_numerator (to_par); to_par_d = gst_value_get_fraction_denominator (to_par); /* Calculate scale factor for the PAR change */ if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_n, to_par_d, &num, &den)) { GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL), ("Error calculating the output scaled size - integer overflow")); goto done; } /* Try to keep the input height (because of interlacing) */ tmp = gst_structure_copy (outs); gst_structure_fixate_field_nearest_int (tmp, "height", from_h); gst_structure_get_int (tmp, "height", &set_h); /* This might have failed but try to scale the width * to keep the DAR nonetheless */ w = (guint) gst_util_uint64_scale_int (set_h, num, den); gst_structure_fixate_field_nearest_int (tmp, "width", w); gst_structure_get_int (tmp, "width", &set_w); gst_structure_free (tmp); /* We kept the DAR and the height is nearest to the original height */ if (set_w == w) { gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", G_TYPE_INT, set_h, NULL); goto done; } f_h = set_h; f_w = set_w; /* If the former failed, try to keep the input width at least */ tmp = gst_structure_copy (outs); gst_structure_fixate_field_nearest_int (tmp, "width", from_w); gst_structure_get_int (tmp, "width", &set_w); /* This might have failed but try to scale the width * to keep the DAR nonetheless */ h = (guint) gst_util_uint64_scale_int (set_w, den, num); gst_structure_fixate_field_nearest_int (tmp, "height", h); gst_structure_get_int (tmp, "height", &set_h); gst_structure_free (tmp); /* We kept the DAR and the width is nearest to the original width */ if (set_h == h) { gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", G_TYPE_INT, set_h, NULL); goto done; } /* If all this failed, keep the height that was nearest to the orignal * height and the nearest possible width. This changes the DAR but * there's not much else to do here. */ gst_structure_set (outs, "width", G_TYPE_INT, f_w, "height", G_TYPE_INT, f_h, NULL); goto done; } else { GstStructure *tmp; gint set_h, set_w, set_par_n, set_par_d, tmp2; /* width, height and PAR are not fixed but passthrough is not possible */ /* First try to keep the height and width as good as possible * and scale PAR */ tmp = gst_structure_copy (outs); gst_structure_fixate_field_nearest_int (tmp, "height", from_h); gst_structure_get_int (tmp, "height", &set_h); gst_structure_fixate_field_nearest_int (tmp, "width", from_w); gst_structure_get_int (tmp, "width", &set_w); if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, set_w, &to_par_n, &to_par_d)) { GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL), ("Error calculating the output scaled size - integer overflow")); goto done; } if (!gst_structure_has_field (tmp, "pixel-aspect-ratio")) gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par); gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio", to_par_n, to_par_d); gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n, &set_par_d); gst_structure_free (tmp); if (set_par_n == to_par_n && set_par_d == to_par_d) { gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", G_TYPE_INT, set_h, NULL); if (gst_structure_has_field (outs, "pixel-aspect-ratio") || set_par_n != set_par_d) gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, NULL); goto done; } /* Otherwise try to scale width to keep the DAR with the set * PAR and height */ if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d, set_par_n, &num, &den)) { GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL), ("Error calculating the output scaled size - integer overflow")); goto done; } w = (guint) gst_util_uint64_scale_int (set_h, num, den); tmp = gst_structure_copy (outs); gst_structure_fixate_field_nearest_int (tmp, "width", w); gst_structure_get_int (tmp, "width", &tmp2); gst_structure_free (tmp); if (tmp2 == w) { gst_structure_set (outs, "width", G_TYPE_INT, tmp2, "height", G_TYPE_INT, set_h, NULL); if (gst_structure_has_field (outs, "pixel-aspect-ratio") || set_par_n != set_par_d) gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, NULL); goto done; } /* ... or try the same with the height */ h = (guint) gst_util_uint64_scale_int (set_w, den, num); tmp = gst_structure_copy (outs); gst_structure_fixate_field_nearest_int (tmp, "height", h); gst_structure_get_int (tmp, "height", &tmp2); gst_structure_free (tmp); if (tmp2 == h) { gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", G_TYPE_INT, tmp2, NULL); if (gst_structure_has_field (outs, "pixel-aspect-ratio") || set_par_n != set_par_d) gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, NULL); goto done; } /* If all fails we can't keep the DAR and take the nearest values * for everything from the first try */ gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", G_TYPE_INT, set_h, NULL); if (gst_structure_has_field (outs, "pixel-aspect-ratio") || set_par_n != set_par_d) gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, NULL); } } done: GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, othercaps); if (from_par == &fpar) g_value_unset (&fpar); if (to_par == &tpar) g_value_unset (&tpar); 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_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) { if (!gst_element_register (plugin, "videoscale", GST_RANK_NONE, GST_TYPE_VIDEO_SCALE)) return FALSE; GST_DEBUG_CATEGORY_INIT (video_scale_debug, "videoscale", 0, "videoscale element"); GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE"); return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, videoscale, "Resizes video", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)