/* GStreamer * Copyright (C) 2013 Mathieu Duponchelle <mduponchelle1@gmail.com> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Suite 500, * Boston, MA 02110-1335, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <gst/gst.h> #include <gst/video/video.h> #include "gstframepositioner.h" /* We need to define a max number of pixel so we can interpolate them */ #define MAX_PIXELS 100000 #define MIN_PIXELS -100000 static void gst_frame_positioner_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec); static void gst_frame_positioner_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec); static GstFlowReturn gst_frame_positioner_transform_ip (GstBaseTransform * trans, GstBuffer * buf); static gboolean gst_frame_positioner_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer); static gboolean gst_frame_positioner_meta_transform (GstBuffer * dest, GstMeta * meta, GstBuffer * buffer, GQuark type, gpointer data); enum { PROP_0, PROP_ALPHA, PROP_POSX, PROP_POSY, PROP_ZORDER, PROP_WIDTH, PROP_HEIGHT }; static GstStaticPadTemplate gst_frame_positioner_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw") ); static GstStaticPadTemplate gst_frame_positioner_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw") ); G_DEFINE_TYPE (GstFramePositioner, gst_frame_positioner, GST_TYPE_BASE_TRANSFORM); static void _weak_notify_cb (GstFramePositioner * pos, GObject * old) { pos->current_track = NULL; } static void gst_frame_positioner_update_properties (GstFramePositioner * pos, gboolean track_mixing, gint old_track_width, gint old_track_height) { GstCaps *caps; if (pos->capsfilter == NULL) return; if (pos->track_width && pos->track_height && (!track_mixing || !pos->scale_in_compositor)) { caps = gst_caps_new_simple ("video/x-raw", "width", G_TYPE_INT, pos->track_width, "height", G_TYPE_INT, pos->track_height, NULL); } else { caps = gst_caps_new_empty_simple ("video/x-raw"); } if (pos->fps_n != -1) gst_caps_set_simple (caps, "framerate", GST_TYPE_FRACTION, pos->fps_n, pos->fps_d, NULL); if (old_track_width && pos->width == old_track_width && old_track_height && pos->height == old_track_height && ((float) old_track_width / (float) old_track_height) == ((float) pos->track_width / (float) pos->track_height)) { GST_DEBUG_OBJECT (pos, "Following track size width old_track: %d -- pos: %d" " || height, old_track %d -- pos: %d", old_track_width, pos->width, old_track_height, pos->height); pos->width = pos->track_width; pos->height = pos->track_height; } GST_DEBUG_OBJECT (caps, "setting caps"); g_object_set (pos->capsfilter, "caps", caps, NULL); gst_caps_unref (caps); } static void sync_properties_from_track (GstFramePositioner * pos, GESTrack * track) { gint width, height; gint old_track_width, old_track_height; GstCaps *caps; g_object_get (track, "restriction-caps", &caps, NULL); width = height = 0; if (caps && gst_caps_get_size (caps) > 0) { GstStructure *structure; structure = gst_caps_get_structure (caps, 0); if (!gst_structure_get_int (structure, "width", &width)) width = 0; if (!gst_structure_get_int (structure, "height", &height)) height = 0; if (!gst_structure_get_fraction (structure, "framerate", &(pos->fps_n), &(pos->fps_d))) pos->fps_n = -1; } old_track_width = pos->track_width; old_track_height = pos->track_height; pos->track_width = width; pos->track_height = height; GST_DEBUG_OBJECT (pos, "syncing framerate from caps : %d/%d", pos->fps_n, pos->fps_d); gst_frame_positioner_update_properties (pos, ges_track_get_mixing (track), old_track_width, old_track_height); } static void _track_restriction_changed_cb (GESTrack * track, GParamSpec * arg G_GNUC_UNUSED, GstFramePositioner * pos) { sync_properties_from_track (pos, track); } static void set_track (GstFramePositioner * pos) { GESTrack *new_track; if (pos->current_track) { g_signal_handlers_disconnect_by_func (pos->current_track, (GCallback) _track_restriction_changed_cb, pos); g_object_weak_unref (G_OBJECT (pos->current_track), (GWeakNotify) _weak_notify_cb, pos); } new_track = ges_track_element_get_track (pos->track_source); if (new_track) { pos->current_track = new_track; g_object_weak_ref (G_OBJECT (new_track), (GWeakNotify) _weak_notify_cb, pos); GST_DEBUG_OBJECT (pos, "connecting to track : %p", pos->current_track); g_signal_connect (pos->current_track, "notify::restriction-caps", (GCallback) _track_restriction_changed_cb, pos); sync_properties_from_track (pos, pos->current_track); } else { pos->current_track = NULL; } } static void _track_changed_cb (GESTrackElement * trksrc, GParamSpec * arg G_GNUC_UNUSED, GstFramePositioner * pos) { set_track (pos); } static void _trk_element_weak_notify_cb (GstFramePositioner * pos, GObject * old) { pos->track_source = NULL; } void ges_frame_positioner_set_source_and_filter (GstFramePositioner * pos, GESTrackElement * trksrc, GstElement * capsfilter) { pos->track_source = trksrc; pos->capsfilter = capsfilter; pos->current_track = ges_track_element_get_track (trksrc); g_object_weak_ref (G_OBJECT (trksrc), (GWeakNotify) _trk_element_weak_notify_cb, pos); g_signal_connect (trksrc, "notify::track", (GCallback) _track_changed_cb, pos); set_track (pos); } static void gst_frame_positioner_dispose (GObject * object) { GstFramePositioner *pos = GST_FRAME_POSITIONNER (object); if (pos->track_source) { g_signal_handlers_disconnect_by_func (pos->track_source, _track_changed_cb, pos); pos->track_source = NULL; } if (pos->current_track) { g_signal_handlers_disconnect_by_func (pos->current_track, _track_restriction_changed_cb, pos); g_object_weak_unref (G_OBJECT (pos->current_track), (GWeakNotify) _weak_notify_cb, pos); pos->current_track = NULL; } G_OBJECT_CLASS (gst_frame_positioner_parent_class)->dispose (object); } static void gst_frame_positioner_class_init (GstFramePositionerClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstBaseTransformClass *base_transform_class = GST_BASE_TRANSFORM_CLASS (klass); gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass), &gst_frame_positioner_src_template); gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass), &gst_frame_positioner_sink_template); gobject_class->set_property = gst_frame_positioner_set_property; gobject_class->get_property = gst_frame_positioner_get_property; gobject_class->dispose = gst_frame_positioner_dispose; base_transform_class->transform_ip = GST_DEBUG_FUNCPTR (gst_frame_positioner_transform_ip); /** * gstframepositioner:alpha: * * The desired alpha for the stream. */ g_object_class_install_property (gobject_class, PROP_ALPHA, g_param_spec_double ("alpha", "alpha", "alpha of the stream", 0.0, 1.0, 1.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); /** * gstframepositioner:posx: * * The desired x position for the stream. */ g_object_class_install_property (gobject_class, PROP_POSX, g_param_spec_int ("posx", "posx", "x position of the stream", MIN_PIXELS, MAX_PIXELS, 0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); /** * gstframepositioner:posy: * * The desired y position for the stream. */ g_object_class_install_property (gobject_class, PROP_POSY, g_param_spec_int ("posy", "posy", "y position of the stream", MIN_PIXELS, MAX_PIXELS, 0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); /** * gstframepositioner:zorder: * * The desired z order for the stream. */ g_object_class_install_property (gobject_class, PROP_ZORDER, g_param_spec_uint ("zorder", "zorder", "z order of the stream", 0, G_MAXUINT, 0, G_PARAM_READWRITE)); /** * gesframepositioner:width: * * The desired width for that source. * Set to 0 if size is not mandatory, will be set to width of the current track. */ g_object_class_install_property (gobject_class, PROP_WIDTH, g_param_spec_int ("width", "width", "width of the source", 0, MAX_PIXELS, 0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); /** * gesframepositioner:height: * * The desired height for that source. * Set to 0 if size is not mandatory, will be set to height of the current track. */ g_object_class_install_property (gobject_class, PROP_HEIGHT, g_param_spec_int ("height", "height", "height of the source", 0, MAX_PIXELS, 0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass), "frame positioner", "Metadata", "This element provides with tagging facilities", "mduponchelle1@gmail.com"); } static void gst_frame_positioner_init (GstFramePositioner * framepositioner) { framepositioner->alpha = 1.0; framepositioner->posx = 0.0; framepositioner->posy = 0.0; framepositioner->zorder = 0; framepositioner->width = 0; framepositioner->height = 0; framepositioner->fps_n = -1; framepositioner->fps_d = -1; framepositioner->track_width = 0; framepositioner->track_height = 0; framepositioner->capsfilter = NULL; framepositioner->track_source = NULL; framepositioner->current_track = NULL; framepositioner->scale_in_compositor = TRUE; } void gst_frame_positioner_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { GstFramePositioner *framepositioner = GST_FRAME_POSITIONNER (object); gboolean track_mixing = TRUE; if (framepositioner->current_track) track_mixing = ges_track_get_mixing (framepositioner->current_track); GST_OBJECT_LOCK (framepositioner); switch (property_id) { case PROP_ALPHA: framepositioner->alpha = g_value_get_double (value); break; case PROP_POSX: framepositioner->posx = g_value_get_int (value); break; case PROP_POSY: framepositioner->posy = g_value_get_int (value); break; case PROP_ZORDER: framepositioner->zorder = g_value_get_uint (value); break; case PROP_WIDTH: framepositioner->width = g_value_get_int (value); gst_frame_positioner_update_properties (framepositioner, track_mixing, 0, 0); break; case PROP_HEIGHT: framepositioner->height = g_value_get_int (value); gst_frame_positioner_update_properties (framepositioner, track_mixing, 0, 0); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } GST_OBJECT_UNLOCK (framepositioner); } void gst_frame_positioner_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec) { GstFramePositioner *pos = GST_FRAME_POSITIONNER (object); gint real_width, real_height; GST_DEBUG_OBJECT (pos, "get_property"); switch (property_id) { case PROP_ALPHA: g_value_set_double (value, pos->alpha); break; case PROP_POSX: g_value_set_int (value, pos->posx); break; case PROP_POSY: g_value_set_int (value, pos->posy); break; case PROP_ZORDER: g_value_set_uint (value, pos->zorder); break; case PROP_WIDTH: real_width = (pos->width > 0) ? pos->width : pos->track_width; g_value_set_int (value, real_width); break; case PROP_HEIGHT: real_height = (pos->height > 0) ? pos->height : pos->track_height; g_value_set_int (value, real_height); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } GType gst_frame_positioner_meta_api_get_type (void) { static volatile GType type; static const gchar *tags[] = { "video", NULL }; if (g_once_init_enter (&type)) { GType _type = gst_meta_api_type_register ("GstFramePositionerApi", tags); g_once_init_leave (&type, _type); } return type; } static const GstMetaInfo * gst_frame_positioner_get_info (void) { static const GstMetaInfo *meta_info = NULL; if (g_once_init_enter (&meta_info)) { const GstMetaInfo *meta = gst_meta_register (gst_frame_positioner_meta_api_get_type (), "GstFramePositionerMeta", sizeof (GstFramePositionerMeta), gst_frame_positioner_meta_init, NULL, gst_frame_positioner_meta_transform); g_once_init_leave (&meta_info, meta); } return meta_info; } static gboolean gst_frame_positioner_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer) { GstFramePositionerMeta *smeta; smeta = (GstFramePositionerMeta *) meta; smeta->alpha = 0.0; smeta->posx = smeta->posy = smeta->height = smeta->width = 0; smeta->zorder = 0; return TRUE; } static gboolean gst_frame_positioner_meta_transform (GstBuffer * dest, GstMeta * meta, GstBuffer * buffer, GQuark type, gpointer data) { GstFramePositionerMeta *dmeta, *smeta; smeta = (GstFramePositionerMeta *) meta; if (GST_META_TRANSFORM_IS_COPY (type)) { /* only copy if the complete data is copied as well */ dmeta = (GstFramePositionerMeta *) gst_buffer_add_meta (dest, gst_frame_positioner_get_info (), NULL); dmeta->alpha = smeta->alpha; dmeta->posx = smeta->posx; dmeta->posy = smeta->posy; dmeta->width = smeta->width; dmeta->height = smeta->height; dmeta->zorder = smeta->zorder; } return TRUE; } static GstFlowReturn gst_frame_positioner_transform_ip (GstBaseTransform * trans, GstBuffer * buf) { GstFramePositionerMeta *meta; GstFramePositioner *framepositioner = GST_FRAME_POSITIONNER (trans); GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buf); if (GST_CLOCK_TIME_IS_VALID (timestamp)) { gst_object_sync_values (GST_OBJECT (trans), timestamp); } meta = (GstFramePositionerMeta *) gst_buffer_add_meta (buf, gst_frame_positioner_get_info (), NULL); GST_OBJECT_LOCK (framepositioner); meta->alpha = framepositioner->alpha; meta->posx = framepositioner->posx; meta->posy = framepositioner->posy; meta->width = framepositioner->width; meta->height = framepositioner->height; meta->zorder = framepositioner->zorder; GST_OBJECT_UNLOCK (framepositioner); return GST_FLOW_OK; }