/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) 2005 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-videoscale * @see_also: videorate, ffmpegcolorspace * * 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 ! ffmpegcolorspace ! 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-yuv, width=50 ! xvimagesink * ]| Decode an Ogg/Theora and display the video using xvimagesink with a width * of 50. * * * Last reviewed on 2006-03-02 (0.10.4) */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "gstvideoscale.h" #include "vs_image.h" #include "vs_4tap.h" /* debug variable definition */ GST_DEBUG_CATEGORY (video_scale_debug); #define DEFAULT_PROP_METHOD GST_VIDEO_SCALE_BILINEAR enum { PROP_0, PROP_METHOD /* FILL ME */ }; #undef GST_VIDEO_SIZE_RANGE #define GST_VIDEO_SIZE_RANGE "(int) [ 1, 32767]" static GstStaticCaps gst_video_scale_format_caps[] = { GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA), GST_STATIC_CAPS (GST_VIDEO_CAPS_ARGB), GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRA), GST_STATIC_CAPS (GST_VIDEO_CAPS_ABGR), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV")), GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBx), GST_STATIC_CAPS (GST_VIDEO_CAPS_xRGB), GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRx), GST_STATIC_CAPS (GST_VIDEO_CAPS_xBGR), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y444")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("v308")), GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB), GST_STATIC_CAPS (GST_VIDEO_CAPS_BGR), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y42B")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("YUY2")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("YVYU")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("UYVY")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("YV12")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y41B")), GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB_16), GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB_15), GST_STATIC_CAPS (GST_VIDEO_CAPS_GRAY16 ("BYTE_ORDER")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y16 ")), GST_STATIC_CAPS (GST_VIDEO_CAPS_GRAY8), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y800")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y8 ")), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("GREY")) }; #define GST_TYPE_VIDEO_SCALE_METHOD (gst_video_scale_method_get_type()) static GType gst_video_scale_method_get_type (void) { static GType video_scale_method_type = 0; static const GEnumValue video_scale_methods[] = { {GST_VIDEO_SCALE_NEAREST, "Nearest Neighbour", "nearest-neighbour"}, {GST_VIDEO_SCALE_BILINEAR, "Bilinear", "bilinear"}, {GST_VIDEO_SCALE_4TAP, "4-tap", "4-tap"}, {0, NULL, NULL}, }; if (!video_scale_method_type) { video_scale_method_type = g_enum_register_static ("GstVideoScaleMethod", video_scale_methods); } return video_scale_method_type; } static GstCaps * gst_video_scale_get_capslist (void) { static GstCaps *caps = NULL; static volatile gsize inited = 0; if (g_once_init_enter (&inited)) { gint i; g_assert (caps == NULL); caps = gst_caps_new_empty (); for (i = 0; i < G_N_ELEMENTS (gst_video_scale_format_caps); i++) gst_caps_append (caps, gst_caps_make_writable (gst_static_caps_get (&gst_video_scale_format_caps[i]))); g_once_init_leave (&inited, 1); } return caps; } static GstPadTemplate * gst_video_scale_src_template_factory (void) { return gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, gst_caps_ref (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_caps_ref (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); static gboolean gst_video_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out); static gboolean gst_video_scale_get_unit_size (GstBaseTransform * trans, GstCaps * caps, guint * size); static GstFlowReturn gst_video_scale_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out); static void gst_video_scale_fixate_caps (GstBaseTransform * base, GstPadDirection direction, GstCaps * caps, GstCaps * othercaps); static void gst_video_scale_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_video_scale_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); GST_BOILERPLATE (GstVideoScale, gst_video_scale, GstVideoFilter, GST_TYPE_VIDEO_FILTER); static void gst_video_scale_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details_simple (element_class, "Video scaler", "Filter/Effect/Video", "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 ()); } static void gst_video_scale_class_init (GstVideoScaleClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass; gobject_class->finalize = (GObjectFinalizeFunc) gst_video_scale_finalize; gobject_class->set_property = gst_video_scale_set_property; gobject_class->get_property = gst_video_scale_get_property; g_object_class_install_property (gobject_class, PROP_METHOD, g_param_spec_enum ("method", "method", "method", GST_TYPE_VIDEO_SCALE_METHOD, DEFAULT_PROP_METHOD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); trans_class->transform_caps = GST_DEBUG_FUNCPTR (gst_video_scale_transform_caps); trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_video_scale_set_caps); trans_class->get_unit_size = GST_DEBUG_FUNCPTR (gst_video_scale_get_unit_size); trans_class->transform = GST_DEBUG_FUNCPTR (gst_video_scale_transform); trans_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_video_scale_fixate_caps); trans_class->src_event = GST_DEBUG_FUNCPTR (gst_video_scale_src_event); } static void gst_video_scale_init (GstVideoScale * videoscale, GstVideoScaleClass * klass) { videoscale->tmp_buf = NULL; videoscale->method = DEFAULT_PROP_METHOD; } static void gst_video_scale_finalize (GstVideoScale * videoscale) { if (videoscale->tmp_buf) g_free (videoscale->tmp_buf); G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT (videoscale)); } static void gst_video_scale_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstVideoScale *vscale = GST_VIDEO_SCALE (object); switch (prop_id) { case PROP_METHOD: GST_OBJECT_LOCK (vscale); vscale->method = g_value_get_enum (value); GST_OBJECT_UNLOCK (vscale); break; 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; 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 *ret; GstStructure *structure; /* this function is always called with a simple caps */ g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), NULL); ret = gst_caps_copy (caps); structure = gst_structure_copy (gst_caps_get_structure (ret, 0)); 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_merge_structure (ret, gst_structure_copy (structure)); gst_structure_free (structure); GST_DEBUG_OBJECT (trans, "returning caps: %" GST_PTR_FORMAT, ret); return ret; } static gboolean gst_video_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out) { GstVideoScale *videoscale = GST_VIDEO_SCALE (trans); gboolean ret; gint from_dar_n, from_dar_d, to_dar_n, to_dar_d; gint from_par_n, from_par_d, to_par_n, to_par_d; ret = gst_video_format_parse_caps (in, &videoscale->format, &videoscale->from_width, &videoscale->from_height); ret &= gst_video_format_parse_caps (out, NULL, &videoscale->to_width, &videoscale->to_height); ret &= gst_video_format_parse_caps_interlaced (in, &videoscale->interlaced); if (!ret) goto done; videoscale->src_size = gst_video_format_get_size (videoscale->format, videoscale->from_width, videoscale->from_height); videoscale->dest_size = gst_video_format_get_size (videoscale->format, videoscale->to_width, videoscale->to_height); videoscale->src.width = gst_video_format_get_component_width (videoscale->format, 0, videoscale->from_width); videoscale->src.height = gst_video_format_get_component_height (videoscale->format, 0, videoscale->from_height); videoscale->src.stride = gst_video_format_get_row_stride (videoscale->format, 0, videoscale->from_width); videoscale->dest.width = gst_video_format_get_component_width (videoscale->format, 0, videoscale->to_width); videoscale->dest.height = gst_video_format_get_component_height (videoscale->format, 0, videoscale->to_height); videoscale->dest.stride = gst_video_format_get_row_stride (videoscale->format, 0, videoscale->to_width); if (videoscale->tmp_buf) g_free (videoscale->tmp_buf); videoscale->tmp_buf = g_malloc (videoscale->dest.stride * 4 * (videoscale->interlaced ? 2 : 1)); if (!gst_video_parse_caps_pixel_aspect_ratio (in, &from_par_n, &from_par_d)) from_par_n = from_par_d = 1; if (!gst_video_parse_caps_pixel_aspect_ratio (out, &to_par_n, &to_par_d)) to_par_n = to_par_d = 1; if (!gst_util_fraction_multiply (videoscale->from_width, videoscale->from_height, from_par_n, from_par_d, &from_dar_n, &from_dar_d)) { from_dar_n = from_dar_d = -1; } if (!gst_util_fraction_multiply (videoscale->to_width, videoscale->to_height, to_par_n, to_par_d, &to_dar_n, &to_dar_d)) { to_dar_n = to_dar_d = -1; } if (to_dar_n != from_dar_n || to_dar_d != from_dar_d) GST_WARNING_OBJECT (videoscale, "Can't keep DAR!"); gst_base_transform_set_passthrough (trans, (videoscale->from_width == videoscale->to_width && videoscale->from_height == videoscale->to_height)); GST_DEBUG_OBJECT (videoscale, "from=%dx%d (par=%d/%d dar=%d/%d), size %d " "-> to=%dx%d (par=%d/%d dar=%d/%d), size %d", videoscale->from_width, videoscale->from_height, from_par_n, from_par_d, from_dar_n, from_dar_d, videoscale->src_size, videoscale->to_width, videoscale->to_height, to_par_n, to_par_d, to_dar_n, to_dar_d, videoscale->dest_size); done: return ret; } static gboolean gst_video_scale_get_unit_size (GstBaseTransform * trans, GstCaps * caps, guint * size) { GstVideoFormat format; gint width, height; if (!gst_video_format_parse_caps (caps, &format, &width, &height)) return FALSE; *size = gst_video_format_get_size (format, width, height); return TRUE; } static void gst_video_scale_fixate_caps (GstBaseTransform * base, GstPadDirection direction, GstCaps * caps, GstCaps * othercaps) { GstStructure *ins, *outs; const GValue *from_par, *to_par; GValue fpar = { 0, }, tpar = { 0,}; g_return_if_fail (gst_caps_is_fixed (caps)); GST_DEBUG_OBJECT (base, "trying to fixate othercaps %" GST_PTR_FORMAT " based on caps %" GST_PTR_FORMAT, othercaps, caps); ins = gst_caps_get_structure (caps, 0); outs = gst_caps_get_structure (othercaps, 0); from_par = gst_structure_get_value (ins, "pixel-aspect-ratio"); to_par = gst_structure_get_value (outs, "pixel-aspect-ratio"); /* If we're fixating from the sinkpad we always set the PAR and * assume that missing PAR on the sinkpad means 1/1 and * missing PAR on the srcpad means undefined */ if (direction == GST_PAD_SINK) { if (!from_par) { g_value_init (&fpar, GST_TYPE_FRACTION); gst_value_set_fraction (&fpar, 1, 1); from_par = &fpar; } if (!to_par) { g_value_init (&tpar, GST_TYPE_FRACTION_RANGE); gst_value_set_fraction_range_full (&tpar, 1, G_MAXINT, G_MAXINT, 1); to_par = &tpar; gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION_RANGE, 1, G_MAXINT, G_MAXINT, 1, NULL); } } 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_RANGE); gst_value_set_fraction_range_full (&fpar, 1, G_MAXINT, G_MAXINT, 1); from_par = &fpar; } } /* we have both PAR but they might not be fixated */ { gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d; gint w = 0, h = 0; gint from_dar_n, from_dar_d; gint num, den; /* from_par should be fixed */ g_return_if_fail (gst_value_is_fixed (from_par)); from_par_n = gst_value_get_fraction_numerator (from_par); from_par_d = gst_value_get_fraction_denominator (from_par); gst_structure_get_int (ins, "width", &from_w); gst_structure_get_int (ins, "height", &from_h); /* if both width and height are already fixed, we can't do anything * about it anymore */ if (gst_structure_get_int (outs, "width", &w) && gst_structure_get_int (outs, "height", &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 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; } 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) { 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); 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; } 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) { 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); 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; } 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, "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, "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, "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, "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, NULL); } } done: GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, othercaps); if (from_par == &fpar) g_value_unset (&fpar); if (to_par == &tpar) g_value_unset (&tpar); } static gboolean gst_video_scale_prepare_image (gint format, GstBuffer * buf, VSImage * img, VSImage * img_u, VSImage * img_v, gint step, gboolean interlaced) { gboolean res = TRUE; switch (format) { case GST_VIDEO_FORMAT_I420: case GST_VIDEO_FORMAT_YV12: case GST_VIDEO_FORMAT_Y444: case GST_VIDEO_FORMAT_Y42B: case GST_VIDEO_FORMAT_Y41B: img_u->pixels = GST_BUFFER_DATA (buf) + gst_video_format_get_component_offset (format, 1, img->width, img->height); img_v->pixels = GST_BUFFER_DATA (buf) + gst_video_format_get_component_offset (format, 2, img->width, img->height); img_u->height = gst_video_format_get_component_height (format, 1, img->height); img_v->height = gst_video_format_get_component_height (format, 2, img->height); img_u->width = gst_video_format_get_component_width (format, 1, img->width); img_v->width = gst_video_format_get_component_width (format, 2, img->width); img_u->stride = gst_video_format_get_row_stride (format, 1, img->width); img_v->stride = gst_video_format_get_row_stride (format, 2, img->width); if (interlaced && step == 1) { img_v->pixels += img_v->stride; img_u->pixels += img_u->stride; } if (interlaced) { img_u->height = (img_u->height / 2) + ((step == 0 && img_u->height % 2 == 1) ? 1 : 0); img_u->stride *= 2; img_v->height = (img_v->height / 2) + ((step == 0 && img_v->height % 2 == 1) ? 1 : 0); img_v->stride *= 2; } break; img_u->pixels = GST_BUFFER_DATA (buf) + GST_ROUND_UP_4 (img->width) * img->height; img_u->height = img->height; img_u->width = GST_ROUND_UP_2 (img->width) / 2; img_u->stride = GST_ROUND_UP_8 (img->width) / 2; memcpy (img_v, img_u, sizeof (*img_v)); img_v->pixels = GST_BUFFER_DATA (buf) + (GST_ROUND_UP_4 (img->width) + (GST_ROUND_UP_8 (img->width) / 2)) * img->height; if (interlaced && step == 1) { img_v->pixels += img_v->stride; img_u->pixels += img_u->stride; } if (interlaced) { img_u->height = (img_u->height / 2) + ((step == 0 && img_u->height % 2 == 1) ? 1 : 0); img_u->stride *= 2; img_v->height = (img_v->height / 2) + ((step == 0 && img_v->height % 2 == 1) ? 1 : 0); img_v->stride *= 2; } break; default: break; } return res; } static GstFlowReturn gst_video_scale_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out) { GstVideoScale *videoscale = GST_VIDEO_SCALE (trans); GstFlowReturn ret = GST_FLOW_OK; VSImage dest = videoscale->dest; VSImage src = videoscale->src; VSImage dest_u = { NULL, }; VSImage dest_v = { NULL, }; VSImage src_u = { NULL, }; VSImage src_v = { NULL, }; gint method; gint step; gboolean interlaced = videoscale->interlaced; GST_OBJECT_LOCK (videoscale); method = videoscale->method; GST_OBJECT_UNLOCK (videoscale); src.pixels = GST_BUFFER_DATA (in); dest.pixels = GST_BUFFER_DATA (out); /* For interlaced content we have to run two times with half height * and doubled stride */ if (interlaced) { dest.height /= 2; src.height /= 2; dest.stride *= 2; src.stride *= 2; } if (src.height < 4 && method == GST_VIDEO_SCALE_4TAP) method = GST_VIDEO_SCALE_BILINEAR; for (step = 0; step < (interlaced ? 2 : 1); step++) { gst_video_scale_prepare_image (videoscale->format, in, &videoscale->src, &src_u, &src_v, step, interlaced); gst_video_scale_prepare_image (videoscale->format, out, &videoscale->dest, &dest_u, &dest_v, step, interlaced); if (step == 0 && interlaced) { if (videoscale->from_height % 2 == 1) { src.height += 1; } if (videoscale->to_height % 2 == 1) { dest.height += 1; } } else if (step == 1 && interlaced) { if (videoscale->from_height % 2 == 1) { src.height -= 1; } if (videoscale->to_height % 2 == 1) { dest.height -= 1; } src.pixels += (src.stride / 2); dest.pixels += (dest.stride / 2); } switch (method) { case GST_VIDEO_SCALE_NEAREST: GST_LOG_OBJECT (videoscale, "doing nearest scaling"); switch (videoscale->format) { case GST_VIDEO_FORMAT_RGBx: case GST_VIDEO_FORMAT_xRGB: case GST_VIDEO_FORMAT_BGRx: case GST_VIDEO_FORMAT_xBGR: case GST_VIDEO_FORMAT_RGBA: case GST_VIDEO_FORMAT_ARGB: case GST_VIDEO_FORMAT_BGRA: case GST_VIDEO_FORMAT_ABGR: case GST_VIDEO_FORMAT_AYUV: vs_image_scale_nearest_RGBA (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_RGB: case GST_VIDEO_FORMAT_BGR: case GST_VIDEO_FORMAT_v308: vs_image_scale_nearest_RGB (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_YUY2: case GST_VIDEO_FORMAT_YVYU: vs_image_scale_nearest_YUYV (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_UYVY: vs_image_scale_nearest_UYVY (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_Y800: case GST_VIDEO_FORMAT_GRAY8: vs_image_scale_nearest_Y (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_GRAY16_LE: case GST_VIDEO_FORMAT_GRAY16_BE: case GST_VIDEO_FORMAT_Y16: vs_image_scale_nearest_Y16 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_I420: case GST_VIDEO_FORMAT_YV12: case GST_VIDEO_FORMAT_Y444: case GST_VIDEO_FORMAT_Y42B: case GST_VIDEO_FORMAT_Y41B: vs_image_scale_nearest_Y (&dest, &src, videoscale->tmp_buf); vs_image_scale_nearest_Y (&dest_u, &src_u, videoscale->tmp_buf); vs_image_scale_nearest_Y (&dest_v, &src_v, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_RGB16: vs_image_scale_nearest_RGB565 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_RGB15: vs_image_scale_nearest_RGB555 (&dest, &src, videoscale->tmp_buf); break; default: goto unsupported; } break; case GST_VIDEO_SCALE_BILINEAR: GST_LOG_OBJECT (videoscale, "doing bilinear scaling"); switch (videoscale->format) { case GST_VIDEO_FORMAT_RGBx: case GST_VIDEO_FORMAT_xRGB: case GST_VIDEO_FORMAT_BGRx: case GST_VIDEO_FORMAT_xBGR: case GST_VIDEO_FORMAT_RGBA: case GST_VIDEO_FORMAT_ARGB: case GST_VIDEO_FORMAT_BGRA: case GST_VIDEO_FORMAT_ABGR: case GST_VIDEO_FORMAT_AYUV: vs_image_scale_linear_RGBA (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_RGB: case GST_VIDEO_FORMAT_BGR: case GST_VIDEO_FORMAT_v308: vs_image_scale_linear_RGB (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_YUY2: case GST_VIDEO_FORMAT_YVYU: vs_image_scale_linear_YUYV (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_UYVY: vs_image_scale_linear_UYVY (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_Y800: case GST_VIDEO_FORMAT_GRAY8: vs_image_scale_linear_Y (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_GRAY16_LE: case GST_VIDEO_FORMAT_GRAY16_BE: vs_image_scale_linear_Y16 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_I420: case GST_VIDEO_FORMAT_YV12: case GST_VIDEO_FORMAT_Y444: case GST_VIDEO_FORMAT_Y42B: case GST_VIDEO_FORMAT_Y41B: vs_image_scale_linear_Y (&dest, &src, videoscale->tmp_buf); vs_image_scale_linear_Y (&dest_u, &src_u, videoscale->tmp_buf); vs_image_scale_linear_Y (&dest_v, &src_v, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_RGB16: vs_image_scale_linear_RGB565 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_RGB15: vs_image_scale_linear_RGB555 (&dest, &src, videoscale->tmp_buf); break; default: goto unsupported; } break; case GST_VIDEO_SCALE_4TAP: GST_LOG_OBJECT (videoscale, "doing 4tap scaling"); switch (videoscale->format) { case GST_VIDEO_FORMAT_RGBx: case GST_VIDEO_FORMAT_xRGB: case GST_VIDEO_FORMAT_BGRx: case GST_VIDEO_FORMAT_xBGR: case GST_VIDEO_FORMAT_RGBA: case GST_VIDEO_FORMAT_ARGB: case GST_VIDEO_FORMAT_BGRA: case GST_VIDEO_FORMAT_ABGR: case GST_VIDEO_FORMAT_AYUV: vs_image_scale_4tap_RGBA (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_RGB: case GST_VIDEO_FORMAT_BGR: case GST_VIDEO_FORMAT_v308: vs_image_scale_4tap_RGB (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_YUY2: case GST_VIDEO_FORMAT_YVYU: vs_image_scale_4tap_YUYV (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_UYVY: vs_image_scale_4tap_UYVY (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_Y800: case GST_VIDEO_FORMAT_GRAY8: vs_image_scale_4tap_Y (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_GRAY16_LE: case GST_VIDEO_FORMAT_GRAY16_BE: vs_image_scale_4tap_Y16 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_I420: case GST_VIDEO_FORMAT_YV12: case GST_VIDEO_FORMAT_Y444: case GST_VIDEO_FORMAT_Y42B: case GST_VIDEO_FORMAT_Y41B: vs_image_scale_4tap_Y (&dest, &src, videoscale->tmp_buf); vs_image_scale_4tap_Y (&dest_u, &src_u, videoscale->tmp_buf); vs_image_scale_4tap_Y (&dest_v, &src_v, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_RGB16: vs_image_scale_4tap_RGB565 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_FORMAT_RGB15: vs_image_scale_4tap_RGB555 (&dest, &src, videoscale->tmp_buf); break; default: goto unsupported; } break; default: goto unknown_mode; } } GST_LOG_OBJECT (videoscale, "pushing buffer of %d bytes", GST_BUFFER_SIZE (out)); return ret; /* ERRORS */ unsupported: { GST_ELEMENT_ERROR (videoscale, STREAM, NOT_IMPLEMENTED, (NULL), ("Unsupported format %d for scaling method %d", videoscale->format, method)); return GST_FLOW_ERROR; } unknown_mode: { GST_ELEMENT_ERROR (videoscale, STREAM, NOT_IMPLEMENTED, (NULL), ("Unknown scaling method %d", videoscale->method)); return GST_FLOW_ERROR; } } static gboolean gst_video_scale_src_event (GstBaseTransform * trans, GstEvent * event) { GstVideoScale *videoscale = GST_VIDEO_SCALE (trans); gboolean ret; gdouble a; GstStructure *structure; GST_DEBUG_OBJECT (videoscale, "handling %s event", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_NAVIGATION: event = GST_EVENT (gst_mini_object_make_writable (GST_MINI_OBJECT (event))); structure = (GstStructure *) gst_event_get_structure (event); if (gst_structure_get_double (structure, "pointer_x", &a)) { gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE, a * videoscale->from_width / videoscale->to_width, NULL); } if (gst_structure_get_double (structure, "pointer_y", &a)) { gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE, a * videoscale->from_height / videoscale->to_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"); vs_4tap_init (); return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "videoscale", "Resizes video", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)