/* 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., 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-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 #include #include #include "gstcogutils.h" GST_DEBUG_CATEGORY_STATIC (cog_scale_debug); #define GST_CAT_DEFAULT cog_scale_debug #define GST_TYPE_COG_SCALE \ (gst_cog_scale_get_type()) #define GST_COG_SCALE(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COG_SCALE,GstCogScale)) #define GST_COG_SCALE_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COG_SCALE,GstCogScaleClass)) #define GST_IS_COG_SCALE(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COG_SCALE)) #define GST_IS_COG_SCALE_CLASS(klass) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COG_SCALE)) typedef struct _GstCogScale GstCogScale; typedef struct _GstCogScaleClass GstCogScaleClass; /** * GstCogScale: * * Opaque data structure */ struct _GstCogScale { GstBaseTransform element; int quality; /* negotiated stuff */ GstVideoFormat format; guint src_size; guint dest_size; gint to_width; gint to_height; gint from_width; gint from_height; /*< private > */ }; struct _GstCogScaleClass { GstBaseTransformClass parent_class; }; GType gst_cog_scale_get_type (void); #define DEFAULT_QUALITY 5 enum { PROP_0, PROP_QUALITY }; /* can't handle width/height of 1 yet, since we divide a lot by (n-1) */ #undef GST_VIDEO_SIZE_RANGE #define GST_VIDEO_SIZE_RANGE "(int) [ 2, MAX ]" #define TEMPLATE_CAPS \ GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV, Y42B }") ";" \ GST_VIDEO_CAPS_ARGB) static GstStaticPadTemplate gst_cog_scale_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, TEMPLATE_CAPS); static GstStaticPadTemplate gst_cog_scale_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, TEMPLATE_CAPS); static void gst_cog_scale_base_init (gpointer g_class); static void gst_cog_scale_class_init (GstCogScaleClass * klass); static void gst_cog_scale_init (GstCogScale * videoscale); static void gst_cog_scale_finalize (GstCogScale * videoscale); static gboolean gst_cog_scale_src_event (GstBaseTransform * trans, GstEvent * event); /* base transform vmethods */ static GstCaps *gst_cog_scale_transform_caps (GstBaseTransform * trans, GstPadDirection direction, GstCaps * caps); static gboolean gst_cog_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out); static gboolean gst_cog_scale_get_unit_size (GstBaseTransform * trans, GstCaps * caps, guint * size); static GstFlowReturn gst_cog_scale_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out); static void gst_cog_scale_fixate_caps (GstBaseTransform * base, GstPadDirection direction, GstCaps * caps, GstCaps * othercaps); static void gst_cog_scale_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_cog_scale_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstElementClass *parent_class = NULL; GType gst_cog_scale_get_type (void) { static GType cog_scale_type = 0; if (!cog_scale_type) { static const GTypeInfo cog_scale_info = { sizeof (GstCogScaleClass), gst_cog_scale_base_init, NULL, (GClassInitFunc) gst_cog_scale_class_init, NULL, NULL, sizeof (GstCogScale), 0, (GInstanceInitFunc) gst_cog_scale_init, }; cog_scale_type = g_type_register_static (GST_TYPE_BASE_TRANSFORM, "GstCogScale", &cog_scale_info, 0); GST_DEBUG_CATEGORY_INIT (cog_scale_debug, "cogscale", 0, "Cog scale"); } return cog_scale_type; } static void gst_cog_scale_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_static_metadata (element_class, "Video scaler", "Filter/Effect/Video", "Resizes video", "Wim Taymans "); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_cog_scale_src_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_cog_scale_sink_template)); } static void gst_cog_scale_class_init (GstCogScaleClass * klass) { GObjectClass *gobject_class; GstBaseTransformClass *trans_class; gobject_class = (GObjectClass *) klass; trans_class = (GstBaseTransformClass *) klass; gobject_class->finalize = (GObjectFinalizeFunc) gst_cog_scale_finalize; gobject_class->set_property = gst_cog_scale_set_property; gobject_class->get_property = gst_cog_scale_get_property; g_object_class_install_property (gobject_class, PROP_QUALITY, g_param_spec_int ("quality", "quality", "Scaling Quality", 0, 10, DEFAULT_QUALITY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); trans_class->transform_caps = GST_DEBUG_FUNCPTR (gst_cog_scale_transform_caps); trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_cog_scale_set_caps); trans_class->get_unit_size = GST_DEBUG_FUNCPTR (gst_cog_scale_get_unit_size); trans_class->transform = GST_DEBUG_FUNCPTR (gst_cog_scale_transform); trans_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_cog_scale_fixate_caps); trans_class->src_event = GST_DEBUG_FUNCPTR (gst_cog_scale_src_event); trans_class->passthrough_on_same_caps = TRUE; parent_class = g_type_class_peek_parent (klass); } static void gst_cog_scale_init (GstCogScale * videoscale) { gst_base_transform_set_qos_enabled (GST_BASE_TRANSFORM (videoscale), TRUE); videoscale->quality = DEFAULT_QUALITY; } static void gst_cog_scale_finalize (GstCogScale * videoscale) { G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT (videoscale)); } static void gst_cog_scale_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstCogScale *vscale = GST_COG_SCALE (object); switch (prop_id) { case PROP_QUALITY: GST_OBJECT_LOCK (vscale); vscale->quality = g_value_get_int (value); GST_OBJECT_UNLOCK (vscale); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_cog_scale_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstCogScale *vscale = GST_COG_SCALE (object); switch (prop_id) { case PROP_QUALITY: GST_OBJECT_LOCK (vscale); g_value_set_int (value, vscale->quality); GST_OBJECT_UNLOCK (vscale); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstCaps * gst_cog_scale_transform_caps (GstBaseTransform * trans, GstPadDirection direction, GstCaps * caps) { GstCaps *ret; GstStructure *structure; const GValue *par; /* this function is always called with a simple caps */ g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), NULL); structure = gst_caps_get_structure (caps, 0); ret = gst_caps_copy (caps); structure = 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 ((par = gst_structure_get_value (structure, "pixel-aspect-ratio"))) { GstCaps *copy; GstStructure *cstruct; /* copy input PAR first, this is the prefered PAR */ gst_structure_set_value (structure, "pixel-aspect-ratio", par); /* then make a copy with a fraction range as a second choice */ copy = gst_caps_copy (ret); cstruct = gst_caps_get_structure (copy, 0); gst_structure_set (cstruct, "pixel-aspect-ratio", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL); /* and append */ gst_caps_append (ret, copy); } GST_DEBUG_OBJECT (trans, "returning caps: %" GST_PTR_FORMAT, ret); return ret; } static gboolean gst_cog_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out) { GstCogScale *videoscale; gboolean ret; videoscale = GST_COG_SCALE (trans); 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); 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); /* 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_cog_scale_get_unit_size (GstBaseTransform * trans, GstCaps * caps, guint * size) { GstVideoFormat format; gint width, height; g_assert (size); 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_cog_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); } #if 0 static gboolean gst_cog_scale_prepare_image (gint format, GstBuffer * buf, VSImage * img, VSImage * img_u, VSImage * img_v) { gboolean res = TRUE; img->pixels = GST_BUFFER_DATA (buf); switch (format) { case GST_VIDEO_FORMAT_I420: case GST_VIDEO_FORMAT_YV12: img_u->pixels = img->pixels + 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; break; default: break; } return res; } #endif static GstFlowReturn gst_cog_scale_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out) { GstCogScale *videoscale; GstFlowReturn ret = GST_FLOW_OK; CogFrame *outframe; CogFrame *frame; int w, h; int quality; static const int n_vert_taps[11] = { 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 4 }; static const int n_horiz_taps[11] = { 1, 1, 1, 1, 2, 2, 2, 2, 4, 4, 4 }; videoscale = GST_COG_SCALE (trans); GST_OBJECT_LOCK (videoscale); quality = videoscale->quality; GST_OBJECT_UNLOCK (videoscale); frame = gst_cog_buffer_wrap (gst_buffer_ref (in), videoscale->format, videoscale->from_width, videoscale->from_height); outframe = gst_cog_buffer_wrap (gst_buffer_ref (out), videoscale->format, videoscale->to_width, videoscale->to_height); frame = cog_virt_frame_new_unpack (frame); w = videoscale->from_width; h = videoscale->from_height; while (w >= 2 * videoscale->to_width || h >= 2 * videoscale->to_height) { if (w >= 2 * videoscale->to_width) { frame = cog_virt_frame_new_horiz_downsample (frame, 3); w /= 2; } if (h >= 2 * videoscale->to_height) { frame = cog_virt_frame_new_vert_downsample (frame, 4); h /= 2; } } if (w != videoscale->to_width) { frame = cog_virt_frame_new_horiz_resample (frame, videoscale->to_width, n_horiz_taps[quality]); } if (h != videoscale->to_height) { frame = cog_virt_frame_new_vert_resample (frame, videoscale->to_height, n_vert_taps[quality]); } switch (videoscale->format) { case GST_VIDEO_FORMAT_YUY2: frame = cog_virt_frame_new_pack_YUY2 (frame); break; case GST_VIDEO_FORMAT_UYVY: frame = cog_virt_frame_new_pack_UYVY (frame); break; default: break; } cog_virt_frame_render (frame, outframe); cog_frame_unref (frame); cog_frame_unref (outframe); GST_LOG_OBJECT (videoscale, "pushing buffer of %d bytes", GST_BUFFER_SIZE (out)); return ret; /* ERRORS */ #if 0 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; } #endif } static gboolean gst_cog_scale_src_event (GstBaseTransform * trans, GstEvent * event) { GstCogScale *videoscale; gboolean ret; double a; GstStructure *structure; videoscale = GST_COG_SCALE (trans); 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; case GST_EVENT_QOS: break; default: break; } ret = GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans, event); return ret; }