/* 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 ("video/x-raw-gray, " "bpp = 16, " "depth = 16, " "endianness = BYTE_ORDER, " "width = " GST_VIDEO_SIZE_RANGE ", " "height = " GST_VIDEO_SIZE_RANGE ", " "framerate = " GST_VIDEO_FPS_RANGE), GST_STATIC_CAPS ("video/x-raw-gray, " "bpp = 8, " "depth = 8, " "width = " GST_VIDEO_SIZE_RANGE ", " "height = " GST_VIDEO_SIZE_RANGE ", " "framerate = " GST_VIDEO_FPS_RANGE), GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y800")) }; enum { GST_VIDEO_SCALE_RGBA = 0, GST_VIDEO_SCALE_ARGB, GST_VIDEO_SCALE_BGRA, GST_VIDEO_SCALE_ABGR, GST_VIDEO_SCALE_AYUV, GST_VIDEO_SCALE_RGBx, GST_VIDEO_SCALE_xRGB, GST_VIDEO_SCALE_BGRx, GST_VIDEO_SCALE_xBGR, GST_VIDEO_SCALE_Y444, GST_VIDEO_SCALE_v308, GST_VIDEO_SCALE_RGB, GST_VIDEO_SCALE_BGR, GST_VIDEO_SCALE_Y42B, GST_VIDEO_SCALE_YUY2, GST_VIDEO_SCALE_YVYU, GST_VIDEO_SCALE_UYVY, GST_VIDEO_SCALE_I420, GST_VIDEO_SCALE_YV12, GST_VIDEO_SCALE_Y41B, GST_VIDEO_SCALE_RGB565, GST_VIDEO_SCALE_RGB555, GST_VIDEO_SCALE_GRAY16, GST_VIDEO_SCALE_GRAY8, GST_VIDEO_SCALE_Y }; #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); trans_class->passthrough_on_same_caps = TRUE; } 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); gst_caps_merge_structure (ret, gst_structure_copy (structure)); /* if pixel aspect ratio, make a range of it */ if (gst_structure_get_value (structure, "pixel-aspect-ratio")) { gst_structure_set (structure, "pixel-aspect-ratio", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL); gst_caps_merge_structure (ret, structure); } else { gst_structure_free (structure); } GST_DEBUG_OBJECT (trans, "returning caps: %" GST_PTR_FORMAT, ret); return ret; } static int gst_video_scale_get_format (GstCaps * caps) { gint i; GstCaps *scaps; for (i = 0; i < G_N_ELEMENTS (gst_video_scale_format_caps); i++) { scaps = gst_static_caps_get (&gst_video_scale_format_caps[i]); if (gst_caps_can_intersect (caps, scaps)) { return i; } } return -1; } /* calculate the size of a buffer */ static gboolean gst_video_scale_prepare_size (GstVideoScale * videoscale, gint format, VSImage * img, gint width, gint height, guint * size) { gboolean res = TRUE; img->width = width; img->height = height; switch (format) { case GST_VIDEO_SCALE_RGBx: case GST_VIDEO_SCALE_xRGB: case GST_VIDEO_SCALE_BGRx: case GST_VIDEO_SCALE_xBGR: case GST_VIDEO_SCALE_RGBA: case GST_VIDEO_SCALE_ARGB: case GST_VIDEO_SCALE_BGRA: case GST_VIDEO_SCALE_ABGR: case GST_VIDEO_SCALE_AYUV: img->stride = img->width * 4; *size = img->stride * img->height; break; case GST_VIDEO_SCALE_Y444: img->stride = GST_ROUND_UP_4 (img->width); *size = img->stride * img->height * 3; break; case GST_VIDEO_SCALE_RGB: case GST_VIDEO_SCALE_BGR: case GST_VIDEO_SCALE_v308: img->stride = GST_ROUND_UP_4 (img->width * 3); *size = img->stride * img->height; break; case GST_VIDEO_SCALE_Y42B: img->stride = GST_ROUND_UP_4 (img->width); *size = (GST_ROUND_UP_4 (img->width) + GST_ROUND_UP_8 (img->width)) * img->height; break; case GST_VIDEO_SCALE_YUY2: case GST_VIDEO_SCALE_YVYU: case GST_VIDEO_SCALE_UYVY: img->stride = GST_ROUND_UP_4 (img->width * 2); *size = img->stride * img->height; break; case GST_VIDEO_SCALE_Y41B: img->stride = GST_ROUND_UP_4 (img->width); *size = (GST_ROUND_UP_4 (img->width) + (GST_ROUND_UP_16 (img->width) / 2)) * img->height; break; case GST_VIDEO_SCALE_Y: case GST_VIDEO_SCALE_GRAY8: img->stride = GST_ROUND_UP_4 (img->width); *size = img->stride * img->height; break; case GST_VIDEO_SCALE_GRAY16: img->stride = GST_ROUND_UP_4 (img->width * 2); *size = img->stride * img->height; break; case GST_VIDEO_SCALE_I420: case GST_VIDEO_SCALE_YV12: { gulong img_u_stride, img_u_height; img->stride = GST_ROUND_UP_4 (img->width); img_u_height = GST_ROUND_UP_2 (img->height) / 2; img_u_stride = GST_ROUND_UP_4 (img->stride / 2); *size = img->stride * GST_ROUND_UP_2 (img->height) + 2 * img_u_stride * img_u_height; break; } case GST_VIDEO_SCALE_RGB565: img->stride = GST_ROUND_UP_4 (img->width * 2); *size = img->stride * img->height; break; case GST_VIDEO_SCALE_RGB555: img->stride = GST_ROUND_UP_4 (img->width * 2); *size = img->stride * img->height; break; default: goto unknown_format; } return res; /* ERRORS */ unknown_format: { GST_ELEMENT_ERROR (videoscale, STREAM, NOT_IMPLEMENTED, (NULL), ("Unsupported format %d", videoscale->format)); return FALSE; } } static gboolean parse_caps (GstCaps * caps, gint * format, gint * width, gint * height, gboolean * interlaced) { gboolean ret; GstStructure *structure; structure = gst_caps_get_structure (caps, 0); ret = gst_structure_get_int (structure, "width", width); ret &= gst_structure_get_int (structure, "height", height); if (format) *format = gst_video_scale_get_format (caps); if (interlaced) { *interlaced = FALSE; gst_structure_get_boolean (structure, "interlaced", interlaced); } return ret; } static gboolean gst_video_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out) { GstVideoScale *videoscale = GST_VIDEO_SCALE (trans); gboolean ret; ret = parse_caps (in, &videoscale->format, &videoscale->from_width, &videoscale->from_height, &videoscale->interlaced); ret &= parse_caps (out, NULL, &videoscale->to_width, &videoscale->to_height, NULL); if (!ret) goto done; if (!(ret = gst_video_scale_prepare_size (videoscale, videoscale->format, &videoscale->src, videoscale->from_width, videoscale->from_height, &videoscale->src_size))) /* prepare size has posted an error when it returns FALSE */ goto done; if (!(ret = gst_video_scale_prepare_size (videoscale, videoscale->format, &videoscale->dest, videoscale->to_width, videoscale->to_height, &videoscale->dest_size))) /* prepare size has posted an error when it returns FALSE */ goto done; if (videoscale->tmp_buf) g_free (videoscale->tmp_buf); videoscale->tmp_buf = g_malloc (videoscale->dest.stride * 4 * (videoscale->interlaced ? 2 : 1)); /* FIXME: par */ GST_DEBUG_OBJECT (videoscale, "from=%dx%d, size %d -> to=%dx%d, size %d", videoscale->from_width, videoscale->from_height, videoscale->src_size, videoscale->to_width, videoscale->to_height, videoscale->dest_size); done: return ret; } static gboolean gst_video_scale_get_unit_size (GstBaseTransform * trans, GstCaps * caps, guint * size) { GstVideoScale *videoscale = GST_VIDEO_SCALE (trans); gint format, width, height; VSImage img; g_assert (size); if (!parse_caps (caps, &format, &width, &height, NULL)) return FALSE; if (!gst_video_scale_prepare_size (videoscale, format, &img, width, height, size)) return FALSE; 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; 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"); /* we have both PAR but they might not be fixated */ if (from_par && to_par) { gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d; gint count = 0, w = 0, h = 0; guint 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); /* fixate the out PAR */ if (!gst_value_is_fixed (to_par)) { GST_DEBUG_OBJECT (base, "fixating to_par to %dx%d", from_par_n, from_par_d); gst_structure_fixate_field_nearest_fraction (outs, "pixel-aspect-ratio", from_par_n, from_par_d); } to_par_n = gst_value_get_fraction_numerator (to_par); to_par_d = gst_value_get_fraction_denominator (to_par); /* if both width and height are already fixed, we can't do anything * about it anymore */ if (gst_structure_get_int (outs, "width", &w)) ++count; if (gst_structure_get_int (outs, "height", &h)) ++count; if (count == 2) { GST_DEBUG_OBJECT (base, "dimensions already set to %dx%d, not fixating", w, h); return; } gst_structure_get_int (ins, "width", &from_w); gst_structure_get_int (ins, "height", &from_h); if (!gst_video_calculate_display_ratio (&num, &den, from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d)) { GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL), ("Error calculating the output scaled size - integer overflow")); return; } GST_DEBUG_OBJECT (base, "scaling input with %dx%d and PAR %d/%d to output PAR %d/%d", from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d); GST_DEBUG_OBJECT (base, "resulting output should respect ratio of %d/%d", num, den); /* now find a width x height that respects this display ratio. * prefer those that have one of w/h the same as the incoming video * using wd / hd = num / den */ /* if one of the output width or height is fixed, we work from there */ if (h) { GST_DEBUG_OBJECT (base, "height is fixed,scaling width"); w = (guint) gst_util_uint64_scale_int (h, num, den); } else if (w) { GST_DEBUG_OBJECT (base, "width is fixed, scaling height"); h = (guint) gst_util_uint64_scale_int (w, den, num); } else { /* none of width or height is fixed, figure out both of them based only on * the input width and height */ /* check hd / den is an integer scale factor, and scale wd with the PAR */ if (from_h % den == 0) { GST_DEBUG_OBJECT (base, "keeping video height"); h = from_h; w = (guint) gst_util_uint64_scale_int (h, num, den); } else if (from_w % num == 0) { GST_DEBUG_OBJECT (base, "keeping video width"); w = from_w; h = (guint) gst_util_uint64_scale_int (w, den, num); } else { GST_DEBUG_OBJECT (base, "approximating but keeping video height"); h = from_h; w = (guint) gst_util_uint64_scale_int (h, num, den); } } GST_DEBUG_OBJECT (base, "scaling to %dx%d", w, h); /* now fixate */ gst_structure_fixate_field_nearest_int (outs, "width", w); gst_structure_fixate_field_nearest_int (outs, "height", h); } else { gint width, height; if (gst_structure_get_int (ins, "width", &width)) { if (gst_structure_has_field (outs, "width")) { gst_structure_fixate_field_nearest_int (outs, "width", width); } } if (gst_structure_get_int (ins, "height", &height)) { if (gst_structure_has_field (outs, "height")) { gst_structure_fixate_field_nearest_int (outs, "height", height); } } } GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, othercaps); } 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_SCALE_I420: case GST_VIDEO_SCALE_YV12: img_u->pixels = GST_BUFFER_DATA (buf) + GST_ROUND_UP_2 (img->height) * img->stride; img_u->height = GST_ROUND_UP_2 (img->height) / 2; img_u->width = GST_ROUND_UP_2 (img->width) / 2; img_u->stride = GST_ROUND_UP_4 (img_u->width); memcpy (img_v, img_u, sizeof (*img_v)); img_v->pixels = img_u->pixels + img_u->height * img_u->stride; 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; case GST_VIDEO_SCALE_Y444: img_u->pixels = GST_BUFFER_DATA (buf) + GST_ROUND_UP_4 (img->width) * img->height; img_u->height = img->height; img_u->width = img->width; img_u->stride = img->stride; memcpy (img_v, img_u, sizeof (*img_v)); img_v->pixels = GST_BUFFER_DATA (buf) + GST_ROUND_UP_4 (img->width) * img->height * 2; 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; case GST_VIDEO_SCALE_Y42B: 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; case GST_VIDEO_SCALE_Y41B: 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_4 (img->width) / 4; img_u->stride = GST_ROUND_UP_16 (img->width) / 4; memcpy (img_v, img_u, sizeof (*img_v)); img_v->pixels = GST_BUFFER_DATA (buf) + (GST_ROUND_UP_4 (img->width) + (GST_ROUND_UP_16 (img->width) / 4)) * 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_SCALE_RGBx: case GST_VIDEO_SCALE_xRGB: case GST_VIDEO_SCALE_BGRx: case GST_VIDEO_SCALE_xBGR: case GST_VIDEO_SCALE_RGBA: case GST_VIDEO_SCALE_ARGB: case GST_VIDEO_SCALE_BGRA: case GST_VIDEO_SCALE_ABGR: case GST_VIDEO_SCALE_AYUV: vs_image_scale_nearest_RGBA (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_RGB: case GST_VIDEO_SCALE_BGR: case GST_VIDEO_SCALE_v308: vs_image_scale_nearest_RGB (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_YUY2: case GST_VIDEO_SCALE_YVYU: vs_image_scale_nearest_YUYV (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_UYVY: vs_image_scale_nearest_UYVY (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_Y: case GST_VIDEO_SCALE_GRAY8: vs_image_scale_nearest_Y (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_GRAY16: vs_image_scale_nearest_Y16 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_I420: case GST_VIDEO_SCALE_YV12: case GST_VIDEO_SCALE_Y444: case GST_VIDEO_SCALE_Y42B: case GST_VIDEO_SCALE_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_SCALE_RGB565: vs_image_scale_nearest_RGB565 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_RGB555: 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_SCALE_RGBx: case GST_VIDEO_SCALE_xRGB: case GST_VIDEO_SCALE_BGRx: case GST_VIDEO_SCALE_xBGR: case GST_VIDEO_SCALE_RGBA: case GST_VIDEO_SCALE_ARGB: case GST_VIDEO_SCALE_BGRA: case GST_VIDEO_SCALE_ABGR: case GST_VIDEO_SCALE_AYUV: vs_image_scale_linear_RGBA (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_RGB: case GST_VIDEO_SCALE_BGR: case GST_VIDEO_SCALE_v308: vs_image_scale_linear_RGB (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_YUY2: case GST_VIDEO_SCALE_YVYU: vs_image_scale_linear_YUYV (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_UYVY: vs_image_scale_linear_UYVY (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_Y: case GST_VIDEO_SCALE_GRAY8: vs_image_scale_linear_Y (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_GRAY16: vs_image_scale_linear_Y16 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_I420: case GST_VIDEO_SCALE_YV12: case GST_VIDEO_SCALE_Y444: case GST_VIDEO_SCALE_Y42B: case GST_VIDEO_SCALE_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_SCALE_RGB565: vs_image_scale_linear_RGB565 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_RGB555: 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_SCALE_RGBx: case GST_VIDEO_SCALE_xRGB: case GST_VIDEO_SCALE_BGRx: case GST_VIDEO_SCALE_xBGR: case GST_VIDEO_SCALE_RGBA: case GST_VIDEO_SCALE_ARGB: case GST_VIDEO_SCALE_BGRA: case GST_VIDEO_SCALE_ABGR: case GST_VIDEO_SCALE_AYUV: vs_image_scale_4tap_RGBA (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_RGB: case GST_VIDEO_SCALE_BGR: case GST_VIDEO_SCALE_v308: vs_image_scale_4tap_RGB (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_YUY2: case GST_VIDEO_SCALE_YVYU: vs_image_scale_4tap_YUYV (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_UYVY: vs_image_scale_4tap_UYVY (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_Y: case GST_VIDEO_SCALE_GRAY8: vs_image_scale_4tap_Y (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_GRAY16: vs_image_scale_4tap_Y16 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_I420: case GST_VIDEO_SCALE_YV12: case GST_VIDEO_SCALE_Y444: case GST_VIDEO_SCALE_Y42B: case GST_VIDEO_SCALE_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_SCALE_RGB565: vs_image_scale_4tap_RGB565 (&dest, &src, videoscale->tmp_buf); break; case GST_VIDEO_SCALE_RGB555: 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) { oil_init (); if (!gst_element_register (plugin, "videoscale", GST_RANK_NONE, GST_TYPE_VIDEO_SCALE)) return FALSE; GST_DEBUG_CATEGORY_INIT (video_scale_debug, "videoscale", 0, "videoscale element"); vs_4tap_init (); return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "videoscale", "Resizes video", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)