mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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53637ad749
We try to do our best to have the video frames scaled the best way to fill most space on the final frames, keeping aspect ratio. The user can later on rescale or move the sources as usual but it makes the default behaviour a better and more natural especially now that we set default restriction caps to the video tracks. And fix the unit test to take that change into account
605 lines
18 KiB
C
605 lines
18 KiB
C
/* GStreamer
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* Copyright (C) 2013 Mathieu Duponchelle <mduponchelle1@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
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* Boston, MA 02110-1335, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include "gstframepositioner.h"
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GST_DEBUG_CATEGORY_STATIC (framepositioner);
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#undef GST_CAT_DEFAULT
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#define GST_CAT_DEFAULT framepositioner
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/* We need to define a max number of pixel so we can interpolate them */
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#define MAX_PIXELS 100000
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#define MIN_PIXELS -100000
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static void gst_frame_positioner_set_property (GObject * object,
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guint property_id, const GValue * value, GParamSpec * pspec);
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static void gst_frame_positioner_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec);
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static GstFlowReturn gst_frame_positioner_transform_ip (GstBaseTransform *
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trans, GstBuffer * buf);
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static gboolean
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gst_frame_positioner_meta_init (GstMeta * meta, gpointer params,
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GstBuffer * buffer);
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static gboolean gst_frame_positioner_meta_transform (GstBuffer * dest,
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GstMeta * meta, GstBuffer * buffer, GQuark type, gpointer data);
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enum
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{
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PROP_0,
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PROP_ALPHA,
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PROP_POSX,
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PROP_POSY,
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PROP_ZORDER,
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PROP_WIDTH,
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PROP_HEIGHT
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};
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static GstStaticPadTemplate gst_frame_positioner_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw")
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);
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static GstStaticPadTemplate gst_frame_positioner_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw")
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);
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G_DEFINE_TYPE (GstFramePositioner, gst_frame_positioner,
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GST_TYPE_BASE_TRANSFORM);
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static void
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_weak_notify_cb (GstFramePositioner * pos, GObject * old)
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{
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pos->current_track = NULL;
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}
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static gboolean
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auto_position (GstFramePositioner * self)
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{
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gint scaled_width = -1, scaled_height = -1, x, y;
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if (self->user_positioned) {
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GST_DEBUG_OBJECT (self, "Was positioned by the user, not touching anymore");
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return FALSE;
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}
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if (!self->natural_width || !self->natural_height)
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return FALSE;
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if (!self->track_width || !self->track_height) {
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GST_INFO_OBJECT (self, "Track doesn't have a proper size, not "
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"positioning the source");
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return FALSE;
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}
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if (self->track_width == self->natural_width &&
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self->track_height == self->natural_height)
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return TRUE;
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scaled_height =
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gst_util_uint64_scale_int (self->natural_height, self->track_width,
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self->natural_width);
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scaled_width = self->track_width;
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if (scaled_height > self->track_height) {
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scaled_height = self->track_height;
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scaled_width =
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gst_util_uint64_scale_int (self->natural_width, self->track_height,
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self->natural_height);
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}
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x = MAX (0, gst_util_uint64_scale_int_round (1,
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self->track_width - scaled_width, 2));
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y = MAX (0, gst_util_uint64_scale_int_round (1,
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self->track_height - scaled_height, 2));
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GST_INFO_OBJECT (self, "Scalling video to match track size from "
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"%dx%d to %dx%d",
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self->natural_width, self->natural_height, scaled_width, scaled_height);
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self->width = scaled_width;
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self->height = scaled_height;
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self->posx = x;
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self->posy = y;
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return TRUE;
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}
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static void
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gst_frame_positioner_update_properties (GstFramePositioner * pos,
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gboolean track_mixing, gint old_track_width, gint old_track_height)
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{
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GstCaps *caps;
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if (pos->capsfilter == NULL)
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return;
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if (pos->track_width && pos->track_height &&
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(!track_mixing || !pos->scale_in_compositor)) {
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caps =
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gst_caps_new_simple ("video/x-raw", "width", G_TYPE_INT,
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pos->track_width, "height", G_TYPE_INT, pos->track_height, NULL);
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} else {
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caps = gst_caps_new_empty_simple ("video/x-raw");
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}
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if (pos->fps_n != -1)
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gst_caps_set_simple (caps, "framerate", GST_TYPE_FRACTION, pos->fps_n,
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pos->fps_d, NULL);
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if (pos->par_n != -1)
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gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
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pos->par_n, pos->par_d, NULL);
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if (!auto_position (pos)) {
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if (old_track_width && pos->width == old_track_width &&
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old_track_height && pos->height == old_track_height &&
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pos->track_height && pos->track_width &&
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((float) old_track_width / (float) old_track_height) ==
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((float) pos->track_width / (float) pos->track_height)) {
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GST_DEBUG_OBJECT (pos,
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"Following track size width old_track: %d -- pos: %d"
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" || height, old_track %d -- pos: %d", old_track_width, pos->width,
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old_track_height, pos->height);
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pos->width = pos->track_width;
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pos->height = pos->track_height;
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}
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}
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GST_DEBUG_OBJECT (caps, "setting caps");
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g_object_set (pos->capsfilter, "caps", caps, NULL);
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gst_caps_unref (caps);
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}
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static void
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sync_properties_from_track (GstFramePositioner * pos, GESTrack * track)
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{
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gint width, height;
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gint old_track_width, old_track_height;
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GstCaps *caps;
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g_object_get (track, "restriction-caps", &caps, NULL);
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width = height = 0;
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if (caps && gst_caps_get_size (caps) > 0) {
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GstStructure *structure;
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structure = gst_caps_get_structure (caps, 0);
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if (!gst_structure_get_int (structure, "width", &width))
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width = 0;
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if (!gst_structure_get_int (structure, "height", &height))
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height = 0;
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if (!gst_structure_get_fraction (structure, "framerate", &(pos->fps_n),
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&(pos->fps_d)))
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pos->fps_n = -1;
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if (!gst_structure_get_fraction (structure, "pixel-aspect-ratio",
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&(pos->par_n), &(pos->par_d)))
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pos->par_n = -1;
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}
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old_track_width = pos->track_width;
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old_track_height = pos->track_height;
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pos->track_width = width;
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pos->track_height = height;
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GST_DEBUG_OBJECT (pos, "syncing framerate from caps : %d/%d", pos->fps_n,
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pos->fps_d);
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if (caps)
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gst_caps_unref (caps);
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gst_frame_positioner_update_properties (pos, ges_track_get_mixing (track),
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old_track_width, old_track_height);
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}
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static void
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_track_restriction_changed_cb (GESTrack * track, GParamSpec * arg G_GNUC_UNUSED,
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GstFramePositioner * pos)
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{
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sync_properties_from_track (pos, track);
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}
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static void
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set_track (GstFramePositioner * pos)
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{
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GESTrack *new_track;
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if (pos->current_track) {
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g_signal_handlers_disconnect_by_func (pos->current_track,
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(GCallback) _track_restriction_changed_cb, pos);
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g_object_weak_unref (G_OBJECT (pos->current_track),
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(GWeakNotify) _weak_notify_cb, pos);
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}
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new_track = ges_track_element_get_track (pos->track_source);
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if (new_track) {
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pos->current_track = new_track;
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g_object_weak_ref (G_OBJECT (new_track), (GWeakNotify) _weak_notify_cb,
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pos);
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GST_DEBUG_OBJECT (pos, "connecting to track : %p", pos->current_track);
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g_signal_connect (pos->current_track, "notify::restriction-caps",
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(GCallback) _track_restriction_changed_cb, pos);
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sync_properties_from_track (pos, pos->current_track);
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} else {
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pos->current_track = NULL;
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}
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}
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static void
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_track_changed_cb (GESTrackElement * trksrc, GParamSpec * arg G_GNUC_UNUSED,
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GstFramePositioner * pos)
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{
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set_track (pos);
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}
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static void
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_trk_element_weak_notify_cb (GstFramePositioner * pos, GObject * old)
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{
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pos->track_source = NULL;
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gst_object_unref (pos);
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}
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void
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ges_frame_positioner_set_source_and_filter (GstFramePositioner * pos,
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GESTrackElement * trksrc, GstElement * capsfilter)
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{
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pos->track_source = trksrc;
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pos->capsfilter = capsfilter;
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pos->current_track = ges_track_element_get_track (trksrc);
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g_object_weak_ref (G_OBJECT (trksrc),
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(GWeakNotify) _trk_element_weak_notify_cb, gst_object_ref (pos));
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g_signal_connect (trksrc, "notify::track", (GCallback) _track_changed_cb,
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pos);
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set_track (pos);
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}
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static void
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gst_frame_positioner_dispose (GObject * object)
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{
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GstFramePositioner *pos = GST_FRAME_POSITIONNER (object);
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if (pos->track_source) {
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g_signal_handlers_disconnect_by_func (pos->track_source, _track_changed_cb,
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pos);
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pos->track_source = NULL;
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}
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if (pos->current_track) {
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g_signal_handlers_disconnect_by_func (pos->current_track,
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_track_restriction_changed_cb, pos);
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g_object_weak_unref (G_OBJECT (pos->current_track),
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(GWeakNotify) _weak_notify_cb, pos);
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pos->current_track = NULL;
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}
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G_OBJECT_CLASS (gst_frame_positioner_parent_class)->dispose (object);
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}
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static void
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gst_frame_positioner_class_init (GstFramePositionerClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstBaseTransformClass *base_transform_class =
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GST_BASE_TRANSFORM_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (framepositioner, "framepositioner",
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GST_DEBUG_FG_YELLOW, "ges frame positioner");
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gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
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&gst_frame_positioner_src_template);
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gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
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&gst_frame_positioner_sink_template);
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gobject_class->set_property = gst_frame_positioner_set_property;
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gobject_class->get_property = gst_frame_positioner_get_property;
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gobject_class->dispose = gst_frame_positioner_dispose;
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base_transform_class->transform_ip =
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GST_DEBUG_FUNCPTR (gst_frame_positioner_transform_ip);
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/**
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* gstframepositioner:alpha:
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*
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* The desired alpha for the stream.
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*/
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g_object_class_install_property (gobject_class, PROP_ALPHA,
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g_param_spec_double ("alpha", "alpha", "alpha of the stream",
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0.0, 1.0, 1.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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/**
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* gstframepositioner:posx:
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*
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* The desired x position for the stream.
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*/
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g_object_class_install_property (gobject_class, PROP_POSX,
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g_param_spec_int ("posx", "posx", "x position of the stream",
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MIN_PIXELS, MAX_PIXELS, 0,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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/**
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* gstframepositioner:posy:
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*
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* The desired y position for the stream.
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*/
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g_object_class_install_property (gobject_class, PROP_POSY,
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g_param_spec_int ("posy", "posy", "y position of the stream",
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MIN_PIXELS, MAX_PIXELS, 0,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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/**
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* gstframepositioner:zorder:
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*
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* The desired z order for the stream.
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*/
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g_object_class_install_property (gobject_class, PROP_ZORDER,
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g_param_spec_uint ("zorder", "zorder", "z order of the stream",
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0, G_MAXUINT, 0, G_PARAM_READWRITE));
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/**
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* gesframepositioner:width:
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*
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* The desired width for that source.
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* Set to 0 if size is not mandatory, will be set to width of the current track.
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*/
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g_object_class_install_property (gobject_class, PROP_WIDTH,
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g_param_spec_int ("width", "width", "width of the source",
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0, MAX_PIXELS, 0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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/**
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* gesframepositioner:height:
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*
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* The desired height for that source.
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* Set to 0 if size is not mandatory, will be set to height of the current track.
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*/
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g_object_class_install_property (gobject_class, PROP_HEIGHT,
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g_param_spec_int ("height", "height", "height of the source",
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0, MAX_PIXELS, 0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass),
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"frame positioner", "Metadata",
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"This element provides with tagging facilities",
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"mduponchelle1@gmail.com");
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}
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static void
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gst_frame_positioner_init (GstFramePositioner * framepositioner)
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{
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framepositioner->alpha = 1.0;
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framepositioner->posx = 0.0;
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framepositioner->posy = 0.0;
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framepositioner->zorder = 0;
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framepositioner->width = 0;
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framepositioner->height = 0;
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framepositioner->fps_n = -1;
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framepositioner->fps_d = -1;
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framepositioner->track_width = 0;
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framepositioner->track_height = 0;
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framepositioner->capsfilter = NULL;
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framepositioner->track_source = NULL;
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framepositioner->current_track = NULL;
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framepositioner->scale_in_compositor = TRUE;
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framepositioner->par_n = -1;
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framepositioner->par_d = 1;
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}
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void
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gst_frame_positioner_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstFramePositioner *framepositioner = GST_FRAME_POSITIONNER (object);
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gboolean track_mixing = TRUE;
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if (framepositioner->current_track)
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track_mixing = ges_track_get_mixing (framepositioner->current_track);
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GST_OBJECT_LOCK (framepositioner);
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switch (property_id) {
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case PROP_ALPHA:
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framepositioner->alpha = g_value_get_double (value);
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break;
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case PROP_POSX:
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framepositioner->posx = g_value_get_int (value);
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framepositioner->user_positioned = TRUE;
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break;
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case PROP_POSY:
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framepositioner->posy = g_value_get_int (value);
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framepositioner->user_positioned = TRUE;
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break;
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case PROP_ZORDER:
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framepositioner->zorder = g_value_get_uint (value);
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break;
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case PROP_WIDTH:
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framepositioner->user_positioned = TRUE;
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framepositioner->width = g_value_get_int (value);
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gst_frame_positioner_update_properties (framepositioner, track_mixing,
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0, 0);
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break;
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case PROP_HEIGHT:
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framepositioner->user_positioned = TRUE;
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framepositioner->height = g_value_get_int (value);
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gst_frame_positioner_update_properties (framepositioner, track_mixing,
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0, 0);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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GST_OBJECT_UNLOCK (framepositioner);
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}
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void
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gst_frame_positioner_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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GstFramePositioner *pos = GST_FRAME_POSITIONNER (object);
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gint real_width, real_height;
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GST_DEBUG_OBJECT (pos, "get_property");
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switch (property_id) {
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case PROP_ALPHA:
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g_value_set_double (value, pos->alpha);
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break;
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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:
|
|
if (pos->scale_in_compositor) {
|
|
g_value_set_int (value, pos->width);
|
|
} else {
|
|
real_width = pos->width > 0 ? pos->width : pos->track_width;
|
|
g_value_set_int (value, real_width);
|
|
}
|
|
break;
|
|
case PROP_HEIGHT:
|
|
if (pos->scale_in_compositor) {
|
|
g_value_set_int (value, pos->height);
|
|
} else {
|
|
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 ((GstMetaInfo **) & 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 ((GstMetaInfo **) & meta_info, (GstMetaInfo *) 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_PTS (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;
|
|
}
|