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1786 lines
53 KiB
C
1786 lines
53 KiB
C
/* Generic video mixer plugin
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* Copyright (C) 2004 Wim Taymans <wim@fluendo.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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-videomixer
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*
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* Videomixer can accept AYUV, ARGB and BGRA video streams. For each of the requested
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* sink pads it will compare the incoming geometry and framerate to define the
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* output parameters. Indeed output video frames will have the geometry of the
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* biggest incoming video stream and the framerate of the fastest incoming one.
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*
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* All sink pads must be either AYUV, ARGB or BGRA, but a mixture of them is not
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* supported. The src pad will have the same colorspace as the sinks.
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* No colorspace conversion is done.
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*
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*
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* Individual parameters for each input stream can be configured on the
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* #GstVideoMixerPad.
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*
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* <refsect2>
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* <title>Sample pipelines</title>
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* |[
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* gst-launch videotestsrc pattern=1 ! video/x-raw-yuv, framerate=\(fraction\)10/1, width=100, height=100 ! videobox border-alpha=0 alpha=0.5 top=-70 bottom=-70 right=-220 ! videomixer name=mix ! ffmpegcolorspace ! xvimagesink videotestsrc ! video/x-raw-yuv, framerate=\(fraction\)5/1, width=320, height=240 ! alpha alpha=0.7 ! mix.
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* ]| A pipeline to demonstrate videomixer used together with videobox.
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* This should show a 320x240 pixels video test source with some transparency
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* showing the background checker pattern. Another video test source with just
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* the snow pattern of 100x100 pixels is overlayed on top of the first one on
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* the left vertically centered with a small transparency showing the first
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* video test source behind and the checker pattern under it. Note that the
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* framerate of the output video is 10 frames per second.
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* |[
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* gst-launch videotestsrc pattern=1 ! video/x-raw-rgb, framerate=\(fraction\)10/1, width=100, height=100 ! videomixer name=mix ! ffmpegcolorspace ! ximagesink videotestsrc ! video/x-raw-rgb, framerate=\(fraction\)5/1, width=320, height=240 ! mix.
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* ]| A pipeline to demostrate bgra mixing. (This does not demonstrate alpha blending).
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* |[
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* gst-launch videotestsrc pattern=1 ! video/x-raw-yuv,format =\(fourcc\)I420, framerate=\(fraction\)10/1, width=100, height=100 ! videomixer name=mix ! ffmpegcolorspace ! ximagesink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)I420, framerate=\(fraction\)5/1, width=320, height=240 ! mix.
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* ]| A pipeline to test I420
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* </refsect2>
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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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#ifdef HAVE_GCC_ASM
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#if defined(HAVE_CPU_I386) || defined(HAVE_CPU_X86_64)
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#define BUILD_X86_ASM
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#endif
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#endif
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#include <gst/gst.h>
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#include <gst/base/gstcollectpads.h>
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#include <gst/controller/gstcontroller.h>
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#include <gst/video/video.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include "videomixer.h"
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GST_DEBUG_CATEGORY (gst_videomixer_debug);
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#define GST_VIDEO_MIXER_GET_STATE_LOCK(mix) \
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(GST_VIDEO_MIXER(mix)->state_lock)
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#define GST_VIDEO_MIXER_STATE_LOCK(mix) \
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(g_mutex_lock(GST_VIDEO_MIXER_GET_STATE_LOCK (mix)))
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#define GST_VIDEO_MIXER_STATE_UNLOCK(mix) \
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(g_mutex_unlock(GST_VIDEO_MIXER_GET_STATE_LOCK (mix)))
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static GType gst_videomixer_get_type (void);
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static void gst_videomixer_pad_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_videomixer_pad_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static gboolean gst_videomixer_src_event (GstPad * pad, GstEvent * event);
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static gboolean gst_videomixer_sink_event (GstPad * pad, GstEvent * event);
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static void gst_videomixer_sort_pads (GstVideoMixer * mix);
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#define DEFAULT_PAD_ZORDER 0
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#define DEFAULT_PAD_XPOS 0
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#define DEFAULT_PAD_YPOS 0
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#define DEFAULT_PAD_ALPHA 1.0
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enum
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{
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PROP_PAD_0,
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PROP_PAD_ZORDER,
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PROP_PAD_XPOS,
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PROP_PAD_YPOS,
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PROP_PAD_ALPHA
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};
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GType gst_videomixer_pad_get_type (void);
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G_DEFINE_TYPE (GstVideoMixerPad, gst_videomixer_pad, GST_TYPE_PAD);
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static void
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gst_videomixer_pad_class_init (GstVideoMixerPadClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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gobject_class->set_property = gst_videomixer_pad_set_property;
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gobject_class->get_property = gst_videomixer_pad_get_property;
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g_object_class_install_property (gobject_class, PROP_PAD_ZORDER,
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g_param_spec_uint ("zorder", "Z-Order", "Z Order of the picture",
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0, 10000, DEFAULT_PAD_ZORDER,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_PAD_XPOS,
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g_param_spec_int ("xpos", "X Position", "X Position of the picture",
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G_MININT, G_MAXINT, DEFAULT_PAD_XPOS,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_PAD_YPOS,
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g_param_spec_int ("ypos", "Y Position", "Y Position of the picture",
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G_MININT, G_MAXINT, DEFAULT_PAD_YPOS,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_PAD_ALPHA,
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g_param_spec_double ("alpha", "Alpha", "Alpha of the picture", 0.0, 1.0,
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DEFAULT_PAD_ALPHA,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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}
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static void
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gst_videomixer_pad_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstVideoMixerPad *pad = GST_VIDEO_MIXER_PAD (object);
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switch (prop_id) {
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case PROP_PAD_ZORDER:
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g_value_set_uint (value, pad->zorder);
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break;
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case PROP_PAD_XPOS:
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g_value_set_int (value, pad->xpos);
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break;
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case PROP_PAD_YPOS:
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g_value_set_int (value, pad->ypos);
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break;
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case PROP_PAD_ALPHA:
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g_value_set_double (value, pad->alpha);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_videomixer_pad_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstVideoMixerPad *pad = GST_VIDEO_MIXER_PAD (object);
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GstVideoMixer *mix = GST_VIDEO_MIXER (gst_pad_get_parent (GST_PAD (pad)));
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switch (prop_id) {
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case PROP_PAD_ZORDER:
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GST_VIDEO_MIXER_STATE_LOCK (mix);
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pad->zorder = g_value_get_uint (value);
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gst_videomixer_sort_pads (mix);
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GST_VIDEO_MIXER_STATE_UNLOCK (mix);
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break;
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case PROP_PAD_XPOS:
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pad->xpos = g_value_get_int (value);
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break;
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case PROP_PAD_YPOS:
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pad->ypos = g_value_get_int (value);
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break;
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case PROP_PAD_ALPHA:
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pad->alpha = g_value_get_double (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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gst_object_unref (mix);
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}
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static void
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gst_videomixer_update_qos (GstVideoMixer * mix, gdouble proportion,
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GstClockTimeDiff diff, GstClockTime timestamp)
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{
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GST_DEBUG_OBJECT (mix,
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"Updating QoS: proportion %lf, diff %s%" GST_TIME_FORMAT ", timestamp %"
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GST_TIME_FORMAT, proportion, (diff < 0) ? "-" : "",
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GST_TIME_ARGS (ABS (diff)), GST_TIME_ARGS (timestamp));
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GST_OBJECT_LOCK (mix);
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mix->proportion = proportion;
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if (G_LIKELY (timestamp != GST_CLOCK_TIME_NONE)) {
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if (G_UNLIKELY (diff > 0))
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mix->earliest_time =
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timestamp + 2 * diff + gst_util_uint64_scale_int (GST_SECOND,
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mix->fps_d, mix->fps_n);
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else
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mix->earliest_time = timestamp + diff;
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} else {
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mix->earliest_time = GST_CLOCK_TIME_NONE;
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}
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GST_OBJECT_UNLOCK (mix);
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}
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static void
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gst_videomixer_reset_qos (GstVideoMixer * mix)
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{
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gst_videomixer_update_qos (mix, 0.5, 0, GST_CLOCK_TIME_NONE);
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}
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static void
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gst_videomixer_read_qos (GstVideoMixer * mix, gdouble * proportion,
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GstClockTime * time)
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{
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GST_OBJECT_LOCK (mix);
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*proportion = mix->proportion;
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*time = mix->earliest_time;
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GST_OBJECT_UNLOCK (mix);
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}
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/* Perform qos calculations before processing the next frame. Returns TRUE if
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* the frame should be processed, FALSE if the frame can be dropped entirely */
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static gboolean
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gst_videomixer_do_qos (GstVideoMixer * mix, GstClockTime timestamp)
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{
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GstClockTime qostime, earliest_time;
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gdouble proportion;
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/* no timestamp, can't do QoS => process frame */
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if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp))) {
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GST_LOG_OBJECT (mix, "invalid timestamp, can't do QoS, process frame");
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return TRUE;
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}
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/* get latest QoS observation values */
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gst_videomixer_read_qos (mix, &proportion, &earliest_time);
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/* skip qos if we have no observation (yet) => process frame */
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if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (earliest_time))) {
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GST_LOG_OBJECT (mix, "no observation yet, process frame");
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return TRUE;
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}
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/* qos is done on running time */
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qostime =
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gst_segment_to_running_time (&mix->segment, GST_FORMAT_TIME, timestamp);
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/* see how our next timestamp relates to the latest qos timestamp */
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GST_LOG_OBJECT (mix, "qostime %" GST_TIME_FORMAT ", earliest %"
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GST_TIME_FORMAT, GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time));
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if (qostime != GST_CLOCK_TIME_NONE && qostime <= earliest_time) {
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GST_DEBUG_OBJECT (mix, "we are late, drop frame");
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return FALSE;
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}
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GST_LOG_OBJECT (mix, "process frame");
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return TRUE;
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}
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static void
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gst_videomixer_set_master_geometry (GstVideoMixer * mix)
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{
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GSList *walk;
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gint width = 0, height = 0, fps_n = 0, fps_d = 0;
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GstVideoMixerPad *master = NULL;
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walk = mix->sinkpads;
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while (walk) {
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GstVideoMixerPad *mixpad = GST_VIDEO_MIXER_PAD (walk->data);
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walk = g_slist_next (walk);
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/* Biggest input geometry will be our output geometry */
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width = MAX (width, mixpad->in_width);
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height = MAX (height, mixpad->in_height);
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/* If mix framerate < mixpad framerate, using fractions */
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GST_DEBUG_OBJECT (mixpad, "comparing framerate %d/%d to mixpad's %d/%d",
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fps_n, fps_d, mixpad->fps_n, mixpad->fps_d);
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if ((!fps_n && !fps_d) ||
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((gint64) fps_n * mixpad->fps_d < (gint64) mixpad->fps_n * fps_d)) {
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fps_n = mixpad->fps_n;
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fps_d = mixpad->fps_d;
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GST_DEBUG_OBJECT (mixpad, "becomes the master pad");
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master = mixpad;
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}
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}
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/* set results */
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if (mix->master != master || mix->in_width != width
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|| mix->in_height != height || mix->fps_n != fps_n
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|| mix->fps_d != fps_d) {
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mix->setcaps = TRUE;
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mix->sendseg = TRUE;
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gst_videomixer_reset_qos (mix);
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mix->master = master;
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mix->in_width = width;
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mix->in_height = height;
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mix->fps_n = fps_n;
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mix->fps_d = fps_d;
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}
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}
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static gboolean
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gst_videomixer_pad_sink_setcaps (GstPad * pad, GstCaps * vscaps)
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{
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GstVideoMixer *mix;
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GstVideoMixerPad *mixpad;
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GstStructure *structure;
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gint in_width, in_height;
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gboolean ret = FALSE;
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const GValue *framerate;
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GST_INFO_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, vscaps);
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mix = GST_VIDEO_MIXER (gst_pad_get_parent (pad));
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mixpad = GST_VIDEO_MIXER_PAD (pad);
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if (!mixpad)
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goto beach;
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structure = gst_caps_get_structure (vscaps, 0);
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if (!gst_structure_get_int (structure, "width", &in_width)
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|| !gst_structure_get_int (structure, "height", &in_height)
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|| (framerate = gst_structure_get_value (structure, "framerate")) == NULL)
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goto beach;
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GST_VIDEO_MIXER_STATE_LOCK (mix);
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mixpad->fps_n = gst_value_get_fraction_numerator (framerate);
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mixpad->fps_d = gst_value_get_fraction_denominator (framerate);
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mixpad->in_width = in_width;
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mixpad->in_height = in_height;
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gst_videomixer_set_master_geometry (mix);
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GST_VIDEO_MIXER_STATE_UNLOCK (mix);
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ret = TRUE;
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beach:
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gst_object_unref (mix);
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return ret;
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}
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/*
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* We accept the caps if it has the same format as other sink pads in
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* the element.
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*/
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static gboolean
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gst_videomixer_pad_sink_acceptcaps (GstPad * pad, GstCaps * vscaps)
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{
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gboolean ret;
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GstVideoMixer *mix;
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GstCaps *acceptedCaps;
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mix = GST_VIDEO_MIXER (gst_pad_get_parent (pad));
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GST_DEBUG_OBJECT (pad, "%" GST_PTR_FORMAT, vscaps);
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GST_VIDEO_MIXER_STATE_LOCK (mix);
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if (mix->master) {
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acceptedCaps = gst_pad_get_fixed_caps_func (GST_PAD (mix->master));
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acceptedCaps = gst_caps_make_writable (acceptedCaps);
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GST_LOG_OBJECT (pad, "master's caps %" GST_PTR_FORMAT, acceptedCaps);
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if (GST_CAPS_IS_SIMPLE (acceptedCaps)) {
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int templCapsSize =
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gst_caps_get_size (gst_pad_get_pad_template_caps (pad));
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guint i;
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for (i = 0; i < templCapsSize; i++) {
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GstCaps *caps1 = gst_caps_copy (acceptedCaps);
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GstCaps *caps2 =
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gst_caps_copy_nth (gst_pad_get_pad_template_caps (pad), i);
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gst_caps_merge (caps1, caps2);
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gst_caps_do_simplify (caps1);
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if (GST_CAPS_IS_SIMPLE (caps1)) {
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gst_caps_replace (&acceptedCaps, caps1);
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gst_caps_unref (caps1);
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break;
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}
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gst_caps_unref (caps1);
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}
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}
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} else {
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acceptedCaps = gst_pad_get_fixed_caps_func (pad);
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}
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GST_INFO_OBJECT (pad, "vscaps: %" GST_PTR_FORMAT, vscaps);
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GST_INFO_OBJECT (pad, "acceptedCaps: %" GST_PTR_FORMAT, acceptedCaps);
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ret = gst_caps_is_always_compatible (vscaps, acceptedCaps);
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gst_caps_unref (acceptedCaps);
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GST_VIDEO_MIXER_STATE_UNLOCK (mix);
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gst_object_unref (mix);
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return ret;
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}
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static void
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gst_videomixer_pad_init (GstVideoMixerPad * mixerpad)
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{
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/* setup some pad functions */
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gst_pad_set_setcaps_function (GST_PAD (mixerpad),
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gst_videomixer_pad_sink_setcaps);
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gst_pad_set_acceptcaps_function (GST_PAD (mixerpad),
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GST_DEBUG_FUNCPTR (gst_videomixer_pad_sink_acceptcaps));
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mixerpad->zorder = DEFAULT_PAD_ZORDER;
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mixerpad->xpos = DEFAULT_PAD_XPOS;
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mixerpad->ypos = DEFAULT_PAD_YPOS;
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mixerpad->alpha = DEFAULT_PAD_ALPHA;
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}
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/* VideoMixer signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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#define DEFAULT_BACKGROUND VIDEO_MIXER_BACKGROUND_CHECKER
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_BACKGROUND
|
|
};
|
|
|
|
#define GST_TYPE_VIDEO_MIXER_BACKGROUND (gst_video_mixer_background_get_type())
|
|
static GType
|
|
gst_video_mixer_background_get_type (void)
|
|
{
|
|
static GType video_mixer_background_type = 0;
|
|
|
|
static const GEnumValue video_mixer_background[] = {
|
|
{VIDEO_MIXER_BACKGROUND_CHECKER, "Checker pattern", "checker"},
|
|
{VIDEO_MIXER_BACKGROUND_BLACK, "Black", "black"},
|
|
{VIDEO_MIXER_BACKGROUND_WHITE, "White", "white"},
|
|
{0, NULL, NULL},
|
|
};
|
|
|
|
if (!video_mixer_background_type) {
|
|
video_mixer_background_type =
|
|
g_enum_register_static ("GstVideoMixerBackground",
|
|
video_mixer_background);
|
|
}
|
|
return video_mixer_background_type;
|
|
}
|
|
|
|
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";"
|
|
GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_ABGR ";"
|
|
GST_VIDEO_CAPS_YUV ("Y444") ";" GST_VIDEO_CAPS_YUV ("Y42B") ";"
|
|
GST_VIDEO_CAPS_YUV ("YUY2") ";" GST_VIDEO_CAPS_YUV ("UYVY") ";"
|
|
GST_VIDEO_CAPS_YUV ("YVYU") ";"
|
|
GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12") ";"
|
|
GST_VIDEO_CAPS_YUV ("Y41B") ";" GST_VIDEO_CAPS_RGB ";"
|
|
GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
|
|
GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx)
|
|
);
|
|
|
|
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
|
|
GST_PAD_SINK,
|
|
GST_PAD_REQUEST,
|
|
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";"
|
|
GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_ABGR ";"
|
|
GST_VIDEO_CAPS_YUV ("Y444") ";" GST_VIDEO_CAPS_YUV ("Y42B") ";"
|
|
GST_VIDEO_CAPS_YUV ("YUY2") ";" GST_VIDEO_CAPS_YUV ("UYVY") ";"
|
|
GST_VIDEO_CAPS_YUV ("YVYU") ";"
|
|
GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12") ";"
|
|
GST_VIDEO_CAPS_YUV ("Y41B") ";" GST_VIDEO_CAPS_RGB ";"
|
|
GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
|
|
GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx)
|
|
);
|
|
|
|
static void gst_videomixer_finalize (GObject * object);
|
|
|
|
static GstCaps *gst_videomixer_getcaps (GstPad * pad);
|
|
static gboolean gst_videomixer_setcaps (GstPad * pad, GstCaps * caps);
|
|
static gboolean gst_videomixer_query (GstPad * pad, GstQuery * query);
|
|
|
|
static GstFlowReturn gst_videomixer_collected (GstCollectPads * pads,
|
|
GstVideoMixer * mix);
|
|
static GstPad *gst_videomixer_request_new_pad (GstElement * element,
|
|
GstPadTemplate * templ, const gchar * name);
|
|
static void gst_videomixer_release_pad (GstElement * element, GstPad * pad);
|
|
|
|
static void gst_videomixer_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec);
|
|
static void gst_videomixer_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec);
|
|
static GstStateChangeReturn gst_videomixer_change_state (GstElement * element,
|
|
GstStateChange transition);
|
|
|
|
/*static guint gst_videomixer_signals[LAST_SIGNAL] = { 0 }; */
|
|
|
|
static void gst_videomixer_child_proxy_init (gpointer g_iface,
|
|
gpointer iface_data);
|
|
static void _do_init (GType object_type);
|
|
|
|
GST_BOILERPLATE_FULL (GstVideoMixer, gst_videomixer, GstElement,
|
|
GST_TYPE_ELEMENT, _do_init);
|
|
|
|
static void
|
|
_do_init (GType object_type)
|
|
{
|
|
static const GInterfaceInfo child_proxy_info = {
|
|
(GInterfaceInitFunc) gst_videomixer_child_proxy_init,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
g_type_add_interface_static (object_type, GST_TYPE_CHILD_PROXY,
|
|
&child_proxy_info);
|
|
GST_INFO ("GstChildProxy interface registered");
|
|
}
|
|
|
|
static GstObject *
|
|
gst_videomixer_child_proxy_get_child_by_index (GstChildProxy * child_proxy,
|
|
guint index)
|
|
{
|
|
GstVideoMixer *mix = GST_VIDEO_MIXER (child_proxy);
|
|
GstObject *obj;
|
|
|
|
GST_VIDEO_MIXER_STATE_LOCK (mix);
|
|
if ((obj = g_slist_nth_data (mix->sinkpads, index)))
|
|
gst_object_ref (obj);
|
|
GST_VIDEO_MIXER_STATE_UNLOCK (mix);
|
|
return obj;
|
|
}
|
|
|
|
static guint
|
|
gst_videomixer_child_proxy_get_children_count (GstChildProxy * child_proxy)
|
|
{
|
|
guint count = 0;
|
|
GstVideoMixer *mix = GST_VIDEO_MIXER (child_proxy);
|
|
|
|
GST_VIDEO_MIXER_STATE_LOCK (mix);
|
|
count = mix->numpads;
|
|
GST_VIDEO_MIXER_STATE_UNLOCK (mix);
|
|
GST_INFO_OBJECT (mix, "Children Count: %d", count);
|
|
return count;
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_child_proxy_init (gpointer g_iface, gpointer iface_data)
|
|
{
|
|
GstChildProxyInterface *iface = g_iface;
|
|
|
|
GST_INFO ("intializing child proxy interface");
|
|
iface->get_child_by_index = gst_videomixer_child_proxy_get_child_by_index;
|
|
iface->get_children_count = gst_videomixer_child_proxy_get_children_count;
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_base_init (gpointer g_class)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
|
|
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&src_factory));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&sink_factory));
|
|
|
|
gst_element_class_set_details_simple (element_class, "Video mixer",
|
|
"Filter/Editor/Video",
|
|
"Mix multiple video streams", "Wim Taymans <wim@fluendo.com>");
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_class_init (GstVideoMixerClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = (GObjectClass *) klass;
|
|
GstElementClass *gstelement_class = (GstElementClass *) klass;
|
|
|
|
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_videomixer_finalize);
|
|
|
|
gobject_class->get_property = gst_videomixer_get_property;
|
|
gobject_class->set_property = gst_videomixer_set_property;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_BACKGROUND,
|
|
g_param_spec_enum ("background", "Background", "Background type",
|
|
GST_TYPE_VIDEO_MIXER_BACKGROUND,
|
|
DEFAULT_BACKGROUND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
gstelement_class->request_new_pad =
|
|
GST_DEBUG_FUNCPTR (gst_videomixer_request_new_pad);
|
|
gstelement_class->release_pad =
|
|
GST_DEBUG_FUNCPTR (gst_videomixer_release_pad);
|
|
gstelement_class->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_videomixer_change_state);
|
|
|
|
/* Register the pad class */
|
|
(void) (GST_TYPE_VIDEO_MIXER_PAD);
|
|
/* Register the background enum */
|
|
(void) (GST_TYPE_VIDEO_MIXER_BACKGROUND);
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_collect_free (GstVideoMixerCollect * mixcol)
|
|
{
|
|
if (mixcol->buffer) {
|
|
gst_buffer_unref (mixcol->buffer);
|
|
mixcol->buffer = NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_reset (GstVideoMixer * mix)
|
|
{
|
|
GSList *walk;
|
|
|
|
mix->in_width = 0;
|
|
mix->in_height = 0;
|
|
mix->out_width = 0;
|
|
mix->out_height = 0;
|
|
mix->fps_n = mix->fps_d = 0;
|
|
mix->setcaps = FALSE;
|
|
mix->sendseg = FALSE;
|
|
|
|
mix->segment_position = 0;
|
|
gst_segment_init (&mix->segment, GST_FORMAT_TIME);
|
|
|
|
gst_videomixer_reset_qos (mix);
|
|
|
|
mix->fmt = GST_VIDEO_FORMAT_UNKNOWN;
|
|
|
|
mix->last_ts = 0;
|
|
mix->last_duration = -1;
|
|
|
|
/* clean up collect data */
|
|
walk = mix->collect->data;
|
|
while (walk) {
|
|
GstVideoMixerCollect *data = (GstVideoMixerCollect *) walk->data;
|
|
|
|
gst_videomixer_collect_free (data);
|
|
walk = g_slist_next (walk);
|
|
}
|
|
|
|
mix->next_sinkpad = 0;
|
|
mix->flush_stop_pending = FALSE;
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_init (GstVideoMixer * mix, GstVideoMixerClass * g_class)
|
|
{
|
|
GstElementClass *klass = GST_ELEMENT_GET_CLASS (mix);
|
|
|
|
mix->srcpad =
|
|
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
|
|
"src"), "src");
|
|
gst_pad_set_getcaps_function (GST_PAD (mix->srcpad),
|
|
GST_DEBUG_FUNCPTR (gst_videomixer_getcaps));
|
|
gst_pad_set_setcaps_function (GST_PAD (mix->srcpad),
|
|
GST_DEBUG_FUNCPTR (gst_videomixer_setcaps));
|
|
gst_pad_set_query_function (GST_PAD (mix->srcpad),
|
|
GST_DEBUG_FUNCPTR (gst_videomixer_query));
|
|
gst_pad_set_event_function (GST_PAD (mix->srcpad),
|
|
GST_DEBUG_FUNCPTR (gst_videomixer_src_event));
|
|
gst_element_add_pad (GST_ELEMENT (mix), mix->srcpad);
|
|
|
|
mix->collect = gst_collect_pads_new ();
|
|
mix->background = DEFAULT_BACKGROUND;
|
|
|
|
gst_collect_pads_set_function (mix->collect,
|
|
(GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_videomixer_collected),
|
|
mix);
|
|
|
|
mix->state_lock = g_mutex_new ();
|
|
/* initialize variables */
|
|
gst_videomixer_reset (mix);
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_finalize (GObject * object)
|
|
{
|
|
GstVideoMixer *mix = GST_VIDEO_MIXER (object);
|
|
|
|
gst_object_unref (mix->collect);
|
|
g_mutex_free (mix->state_lock);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static gboolean
|
|
gst_videomixer_query_duration (GstVideoMixer * mix, GstQuery * query)
|
|
{
|
|
gint64 max;
|
|
gboolean res;
|
|
GstFormat format;
|
|
GstIterator *it;
|
|
gboolean done;
|
|
|
|
/* parse format */
|
|
gst_query_parse_duration (query, &format, NULL);
|
|
|
|
max = -1;
|
|
res = TRUE;
|
|
done = FALSE;
|
|
|
|
/* Take maximum of all durations */
|
|
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
|
|
while (!done) {
|
|
GstIteratorResult ires;
|
|
gpointer item;
|
|
|
|
ires = gst_iterator_next (it, &item);
|
|
switch (ires) {
|
|
case GST_ITERATOR_DONE:
|
|
done = TRUE;
|
|
break;
|
|
case GST_ITERATOR_OK:
|
|
{
|
|
GstPad *pad = GST_PAD_CAST (item);
|
|
gint64 duration;
|
|
|
|
/* ask sink peer for duration */
|
|
res &= gst_pad_query_peer_duration (pad, &format, &duration);
|
|
/* take max from all valid return values */
|
|
if (res) {
|
|
/* valid unknown length, stop searching */
|
|
if (duration == -1) {
|
|
max = duration;
|
|
done = TRUE;
|
|
}
|
|
/* else see if bigger than current max */
|
|
else if (duration > max)
|
|
max = duration;
|
|
}
|
|
gst_object_unref (pad);
|
|
break;
|
|
}
|
|
case GST_ITERATOR_RESYNC:
|
|
max = -1;
|
|
res = TRUE;
|
|
gst_iterator_resync (it);
|
|
break;
|
|
default:
|
|
res = FALSE;
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
gst_iterator_free (it);
|
|
|
|
if (res) {
|
|
/* and store the max */
|
|
GST_DEBUG_OBJECT (mix, "Total duration in format %s: %"
|
|
GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (max));
|
|
gst_query_set_duration (query, format, max);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_videomixer_query_latency (GstVideoMixer * mix, GstQuery * query)
|
|
{
|
|
GstClockTime min, max;
|
|
gboolean live;
|
|
gboolean res;
|
|
GstIterator *it;
|
|
gboolean done;
|
|
|
|
res = TRUE;
|
|
done = FALSE;
|
|
live = FALSE;
|
|
min = 0;
|
|
max = GST_CLOCK_TIME_NONE;
|
|
|
|
/* Take maximum of all latency values */
|
|
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
|
|
while (!done) {
|
|
GstIteratorResult ires;
|
|
gpointer item;
|
|
|
|
ires = gst_iterator_next (it, &item);
|
|
switch (ires) {
|
|
case GST_ITERATOR_DONE:
|
|
done = TRUE;
|
|
break;
|
|
case GST_ITERATOR_OK:
|
|
{
|
|
GstPad *pad = GST_PAD_CAST (item);
|
|
|
|
GstQuery *peerquery;
|
|
|
|
GstClockTime min_cur, max_cur;
|
|
|
|
gboolean live_cur;
|
|
|
|
peerquery = gst_query_new_latency ();
|
|
|
|
/* Ask peer for latency */
|
|
res &= gst_pad_peer_query (pad, peerquery);
|
|
|
|
/* take max from all valid return values */
|
|
if (res) {
|
|
gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur);
|
|
|
|
if (min_cur > min)
|
|
min = min_cur;
|
|
|
|
if (max_cur != GST_CLOCK_TIME_NONE &&
|
|
((max != GST_CLOCK_TIME_NONE && max_cur > max) ||
|
|
(max == GST_CLOCK_TIME_NONE)))
|
|
max = max_cur;
|
|
|
|
live = live || live_cur;
|
|
}
|
|
|
|
gst_query_unref (peerquery);
|
|
gst_object_unref (pad);
|
|
break;
|
|
}
|
|
case GST_ITERATOR_RESYNC:
|
|
live = FALSE;
|
|
min = 0;
|
|
max = GST_CLOCK_TIME_NONE;
|
|
res = TRUE;
|
|
gst_iterator_resync (it);
|
|
break;
|
|
default:
|
|
res = FALSE;
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
gst_iterator_free (it);
|
|
|
|
if (res) {
|
|
/* store the results */
|
|
GST_DEBUG_OBJECT (mix, "Calculated total latency: live %s, min %"
|
|
GST_TIME_FORMAT ", max %" GST_TIME_FORMAT,
|
|
(live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max));
|
|
gst_query_set_latency (query, live, min, max);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_videomixer_query (GstPad * pad, GstQuery * query)
|
|
{
|
|
GstVideoMixer *mix = GST_VIDEO_MIXER (gst_pad_get_parent (pad));
|
|
gboolean res = FALSE;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_POSITION:
|
|
{
|
|
GstFormat format;
|
|
|
|
gst_query_parse_position (query, &format, NULL);
|
|
|
|
switch (format) {
|
|
case GST_FORMAT_TIME:
|
|
/* FIXME, bring to stream time, might be tricky */
|
|
gst_query_set_position (query, format, mix->last_ts);
|
|
res = TRUE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case GST_QUERY_DURATION:
|
|
res = gst_videomixer_query_duration (mix, query);
|
|
break;
|
|
case GST_QUERY_LATENCY:
|
|
res = gst_videomixer_query_latency (mix, query);
|
|
break;
|
|
default:
|
|
/* FIXME, needs a custom query handler because we have multiple
|
|
* sinkpads, send to the master pad until then */
|
|
res = gst_pad_query (GST_PAD_CAST (mix->master), query);
|
|
break;
|
|
}
|
|
|
|
gst_object_unref (mix);
|
|
return res;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_videomixer_getcaps (GstPad * pad)
|
|
{
|
|
GstVideoMixer *mix = GST_VIDEO_MIXER (gst_pad_get_parent (pad));
|
|
GstCaps *caps;
|
|
GstStructure *structure;
|
|
int numCaps;
|
|
|
|
if (mix->master) {
|
|
caps =
|
|
gst_caps_copy (gst_pad_get_pad_template_caps (GST_PAD (mix->master)));
|
|
} else {
|
|
caps = gst_caps_copy (gst_pad_get_pad_template_caps (mix->srcpad));
|
|
}
|
|
|
|
numCaps = gst_caps_get_size (caps) - 1;
|
|
for (; numCaps >= 0; numCaps--) {
|
|
structure = gst_caps_get_structure (caps, numCaps);
|
|
if (mix->out_width != 0) {
|
|
gst_structure_set (structure, "width", G_TYPE_INT, mix->out_width, NULL);
|
|
}
|
|
if (mix->out_height != 0) {
|
|
gst_structure_set (structure, "height", G_TYPE_INT, mix->out_height,
|
|
NULL);
|
|
}
|
|
if (mix->fps_d != 0) {
|
|
gst_structure_set (structure,
|
|
"framerate", GST_TYPE_FRACTION, mix->fps_n, mix->fps_d, NULL);
|
|
}
|
|
}
|
|
|
|
gst_object_unref (mix);
|
|
|
|
return caps;
|
|
}
|
|
|
|
static gboolean
|
|
gst_videomixer_setcaps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstVideoMixer *mixer = GST_VIDEO_MIXER (gst_pad_get_parent_element (pad));
|
|
gboolean ret = FALSE;
|
|
|
|
GST_INFO_OBJECT (mixer, "set src caps: %" GST_PTR_FORMAT, caps);
|
|
|
|
mixer->blend = NULL;
|
|
mixer->fill_checker = NULL;
|
|
mixer->fill_color = NULL;
|
|
|
|
if (!gst_video_format_parse_caps (caps, &mixer->fmt, NULL, NULL))
|
|
goto done;
|
|
|
|
switch (mixer->fmt) {
|
|
case GST_VIDEO_FORMAT_AYUV:
|
|
mixer->blend = gst_video_mixer_blend_ayuv;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_ayuv;
|
|
mixer->fill_color = gst_video_mixer_fill_color_ayuv;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_ARGB:
|
|
mixer->blend = gst_video_mixer_blend_argb;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_argb;
|
|
mixer->fill_color = gst_video_mixer_fill_color_argb;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRA:
|
|
mixer->blend = gst_video_mixer_blend_bgra;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_bgra;
|
|
mixer->fill_color = gst_video_mixer_fill_color_bgra;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_ABGR:
|
|
mixer->blend = gst_video_mixer_blend_abgr;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_abgr;
|
|
mixer->fill_color = gst_video_mixer_fill_color_abgr;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBA:
|
|
mixer->blend = gst_video_mixer_blend_rgba;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_rgba;
|
|
mixer->fill_color = gst_video_mixer_fill_color_rgba;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_Y444:
|
|
mixer->blend = gst_video_mixer_blend_y444;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_y444;
|
|
mixer->fill_color = gst_video_mixer_fill_color_y444;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_Y42B:
|
|
mixer->blend = gst_video_mixer_blend_y42b;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_y42b;
|
|
mixer->fill_color = gst_video_mixer_fill_color_y42b;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_YUY2:
|
|
mixer->blend = gst_video_mixer_blend_yuy2;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_yuy2;
|
|
mixer->fill_color = gst_video_mixer_fill_color_yuy2;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
mixer->blend = gst_video_mixer_blend_uyvy;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_uyvy;
|
|
mixer->fill_color = gst_video_mixer_fill_color_uyvy;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_YVYU:
|
|
mixer->blend = gst_video_mixer_blend_yvyu;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_yvyu;
|
|
mixer->fill_color = gst_video_mixer_fill_color_yvyu;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_I420:
|
|
mixer->blend = gst_video_mixer_blend_i420;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_i420;
|
|
mixer->fill_color = gst_video_mixer_fill_color_i420;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_YV12:
|
|
mixer->blend = gst_video_mixer_blend_yv12;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_yv12;
|
|
mixer->fill_color = gst_video_mixer_fill_color_yv12;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_Y41B:
|
|
mixer->blend = gst_video_mixer_blend_y41b;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_y41b;
|
|
mixer->fill_color = gst_video_mixer_fill_color_y41b;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGB:
|
|
mixer->blend = gst_video_mixer_blend_rgb;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_rgb;
|
|
mixer->fill_color = gst_video_mixer_fill_color_rgb;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGR:
|
|
mixer->blend = gst_video_mixer_blend_bgr;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_bgr;
|
|
mixer->fill_color = gst_video_mixer_fill_color_bgr;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_xRGB:
|
|
mixer->blend = gst_video_mixer_blend_xrgb;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_xrgb;
|
|
mixer->fill_color = gst_video_mixer_fill_color_xrgb;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_xBGR:
|
|
mixer->blend = gst_video_mixer_blend_xbgr;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_xbgr;
|
|
mixer->fill_color = gst_video_mixer_fill_color_xbgr;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBx:
|
|
mixer->blend = gst_video_mixer_blend_rgbx;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_rgbx;
|
|
mixer->fill_color = gst_video_mixer_fill_color_rgbx;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRx:
|
|
mixer->blend = gst_video_mixer_blend_bgrx;
|
|
mixer->fill_checker = gst_video_mixer_fill_checker_bgrx;
|
|
mixer->fill_color = gst_video_mixer_fill_color_bgrx;
|
|
ret = TRUE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
done:
|
|
gst_object_unref (mixer);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstPad *
|
|
gst_videomixer_request_new_pad (GstElement * element,
|
|
GstPadTemplate * templ, const gchar * req_name)
|
|
{
|
|
GstVideoMixer *mix = NULL;
|
|
GstVideoMixerPad *mixpad = NULL;
|
|
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
|
|
|
|
g_return_val_if_fail (templ != NULL, NULL);
|
|
|
|
if (G_UNLIKELY (templ->direction != GST_PAD_SINK)) {
|
|
g_warning ("videomixer: request pad that is not a SINK pad");
|
|
return NULL;
|
|
}
|
|
|
|
g_return_val_if_fail (GST_IS_VIDEO_MIXER (element), NULL);
|
|
|
|
mix = GST_VIDEO_MIXER (element);
|
|
|
|
if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) {
|
|
gint serial = 0;
|
|
gchar *name = NULL;
|
|
GstVideoMixerCollect *mixcol = NULL;
|
|
|
|
GST_VIDEO_MIXER_STATE_LOCK (mix);
|
|
if (req_name == NULL || strlen (req_name) < 6
|
|
|| !g_str_has_prefix (req_name, "sink_")) {
|
|
/* no name given when requesting the pad, use next available int */
|
|
serial = mix->next_sinkpad++;
|
|
} else {
|
|
/* parse serial number from requested padname */
|
|
serial = atoi (&req_name[5]);
|
|
if (serial >= mix->next_sinkpad)
|
|
mix->next_sinkpad = serial + 1;
|
|
}
|
|
/* create new pad with the name */
|
|
name = g_strdup_printf ("sink_%d", serial);
|
|
mixpad = g_object_new (GST_TYPE_VIDEO_MIXER_PAD, "name", name, "direction",
|
|
templ->direction, "template", templ, NULL);
|
|
g_free (name);
|
|
|
|
mixpad->zorder = mix->numpads;
|
|
mixpad->xpos = DEFAULT_PAD_XPOS;
|
|
mixpad->ypos = DEFAULT_PAD_YPOS;
|
|
mixpad->alpha = DEFAULT_PAD_ALPHA;
|
|
|
|
mixcol = (GstVideoMixerCollect *)
|
|
gst_collect_pads_add_pad (mix->collect, GST_PAD (mixpad),
|
|
sizeof (GstVideoMixerCollect));
|
|
|
|
/* FIXME: hacked way to override/extend the event function of
|
|
* GstCollectPads; because it sets its own event function giving the
|
|
* element no access to events */
|
|
mix->collect_event =
|
|
(GstPadEventFunction) GST_PAD_EVENTFUNC (GST_PAD (mixpad));
|
|
gst_pad_set_event_function (GST_PAD (mixpad),
|
|
GST_DEBUG_FUNCPTR (gst_videomixer_sink_event));
|
|
|
|
/* Keep track of each other */
|
|
mixcol->mixpad = mixpad;
|
|
mixpad->mixcol = mixcol;
|
|
|
|
/* Keep an internal list of mixpads for zordering */
|
|
mix->sinkpads = g_slist_append (mix->sinkpads, mixpad);
|
|
mix->numpads++;
|
|
GST_VIDEO_MIXER_STATE_UNLOCK (mix);
|
|
} else {
|
|
g_warning ("videomixer: this is not our template!");
|
|
return NULL;
|
|
}
|
|
|
|
/* add the pad to the element */
|
|
gst_element_add_pad (element, GST_PAD (mixpad));
|
|
gst_child_proxy_child_added (GST_OBJECT (mix), GST_OBJECT (mixpad));
|
|
|
|
return GST_PAD (mixpad);
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_release_pad (GstElement * element, GstPad * pad)
|
|
{
|
|
GstVideoMixer *mix = NULL;
|
|
GstVideoMixerPad *mixpad;
|
|
|
|
mix = GST_VIDEO_MIXER (element);
|
|
GST_VIDEO_MIXER_STATE_LOCK (mix);
|
|
if (G_UNLIKELY (g_slist_find (mix->sinkpads, pad) == NULL)) {
|
|
g_warning ("Unknown pad %s", GST_PAD_NAME (pad));
|
|
goto error;
|
|
}
|
|
|
|
mixpad = GST_VIDEO_MIXER_PAD (pad);
|
|
|
|
mix->sinkpads = g_slist_remove (mix->sinkpads, pad);
|
|
gst_videomixer_collect_free (mixpad->mixcol);
|
|
gst_collect_pads_remove_pad (mix->collect, pad);
|
|
gst_child_proxy_child_removed (GST_OBJECT (mix), GST_OBJECT (mixpad));
|
|
/* determine possibly new geometry and master */
|
|
gst_videomixer_set_master_geometry (mix);
|
|
mix->numpads--;
|
|
GST_VIDEO_MIXER_STATE_UNLOCK (mix);
|
|
|
|
gst_element_remove_pad (element, pad);
|
|
return;
|
|
error:
|
|
GST_VIDEO_MIXER_STATE_UNLOCK (mix);
|
|
}
|
|
|
|
static int
|
|
pad_zorder_compare (const GstVideoMixerPad * pad1,
|
|
const GstVideoMixerPad * pad2)
|
|
{
|
|
return pad1->zorder - pad2->zorder;
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_sort_pads (GstVideoMixer * mix)
|
|
{
|
|
mix->sinkpads = g_slist_sort (mix->sinkpads,
|
|
(GCompareFunc) pad_zorder_compare);
|
|
}
|
|
|
|
/* try to get a buffer on all pads. As long as the queued value is
|
|
* negative, we skip buffers */
|
|
static gboolean
|
|
gst_videomixer_fill_queues (GstVideoMixer * mix)
|
|
{
|
|
GSList *walk = NULL;
|
|
gboolean eos = TRUE;
|
|
|
|
g_return_val_if_fail (GST_IS_VIDEO_MIXER (mix), FALSE);
|
|
|
|
/* try to make sure we have a buffer from each usable pad first */
|
|
walk = mix->collect->data;
|
|
while (walk) {
|
|
GstCollectData *data = (GstCollectData *) walk->data;
|
|
GstVideoMixerCollect *mixcol = (GstVideoMixerCollect *) data;
|
|
GstVideoMixerPad *mixpad = mixcol->mixpad;
|
|
|
|
walk = g_slist_next (walk);
|
|
|
|
if (mixcol->buffer == NULL) {
|
|
GstBuffer *buf = NULL;
|
|
|
|
GST_LOG_OBJECT (mix, "we need a new buffer");
|
|
|
|
buf = gst_collect_pads_peek (mix->collect, data);
|
|
|
|
if (buf) {
|
|
guint64 duration;
|
|
|
|
mixcol->buffer = buf;
|
|
duration = GST_BUFFER_DURATION (mixcol->buffer);
|
|
|
|
GST_LOG_OBJECT (mix, "we have a buffer with duration %" GST_TIME_FORMAT
|
|
", queued %" GST_TIME_FORMAT, GST_TIME_ARGS (duration),
|
|
GST_TIME_ARGS (mixpad->queued));
|
|
|
|
/* no duration on the buffer, use the framerate */
|
|
if (!GST_CLOCK_TIME_IS_VALID (duration)) {
|
|
if (mixpad->fps_n == 0) {
|
|
duration = GST_CLOCK_TIME_NONE;
|
|
} else {
|
|
duration =
|
|
gst_util_uint64_scale_int (GST_SECOND, mixpad->fps_d,
|
|
mixpad->fps_n);
|
|
}
|
|
}
|
|
if (GST_CLOCK_TIME_IS_VALID (duration))
|
|
mixpad->queued += duration;
|
|
else if (!mixpad->queued)
|
|
mixpad->queued = GST_CLOCK_TIME_NONE;
|
|
|
|
GST_LOG_OBJECT (mix, "now queued: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (mixpad->queued));
|
|
} else {
|
|
GST_LOG_OBJECT (mix, "pop returned a NULL buffer");
|
|
}
|
|
}
|
|
if (mix->sendseg && (mixpad == mix->master)) {
|
|
GstEvent *event;
|
|
gint64 stop, start;
|
|
GstSegment *segment = &data->segment;
|
|
|
|
/* FIXME, use rate/applied_rate as set on all sinkpads.
|
|
* - currently we just set rate as received from last seek-event
|
|
* We could potentially figure out the duration as well using
|
|
* the current segment positions and the stated stop positions.
|
|
* Also we just start from stream time 0 which is rather
|
|
* weird. For non-synchronized mixing, the time should be
|
|
* the min of the stream times of all received segments,
|
|
* rationale being that the duration is at least going to
|
|
* be as long as the earliest stream we start mixing. This
|
|
* would also be correct for synchronized mixing but then
|
|
* the later streams would be delayed until the stream times
|
|
* match.
|
|
*/
|
|
GST_INFO_OBJECT (mix, "_sending play segment");
|
|
|
|
start = segment->accum;
|
|
|
|
/* get the duration of the segment if we can and add it to the accumulated
|
|
* time on the segment. */
|
|
if (segment->stop != -1 && segment->start != -1)
|
|
stop = start + (segment->stop - segment->start);
|
|
else
|
|
stop = -1;
|
|
|
|
gst_segment_set_newsegment (&mix->segment, FALSE, segment->rate,
|
|
segment->format, start, stop, start + mix->segment_position);
|
|
event =
|
|
gst_event_new_new_segment_full (FALSE, segment->rate, 1.0,
|
|
segment->format, start, stop, start + mix->segment_position);
|
|
gst_pad_push_event (mix->srcpad, event);
|
|
mix->sendseg = FALSE;
|
|
}
|
|
|
|
if (mixcol->buffer != NULL && GST_CLOCK_TIME_IS_VALID (mixpad->queued)) {
|
|
/* got a buffer somewhere so we're not eos */
|
|
eos = FALSE;
|
|
}
|
|
}
|
|
|
|
return eos;
|
|
}
|
|
|
|
/* blend all buffers present on the pads */
|
|
static void
|
|
gst_videomixer_blend_buffers (GstVideoMixer * mix, GstBuffer * outbuf)
|
|
{
|
|
GSList *walk;
|
|
|
|
walk = mix->sinkpads;
|
|
while (walk) { /* We walk with this list because it's ordered */
|
|
GstVideoMixerPad *pad = GST_VIDEO_MIXER_PAD (walk->data);
|
|
GstVideoMixerCollect *mixcol = pad->mixcol;
|
|
|
|
walk = g_slist_next (walk);
|
|
|
|
if (mixcol->buffer != NULL) {
|
|
GstClockTime timestamp;
|
|
gint64 stream_time;
|
|
GstSegment *seg;
|
|
|
|
seg = &mixcol->collect.segment;
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (mixcol->buffer);
|
|
|
|
stream_time =
|
|
gst_segment_to_stream_time (seg, GST_FORMAT_TIME, timestamp);
|
|
|
|
/* sync object properties on stream time */
|
|
if (GST_CLOCK_TIME_IS_VALID (stream_time))
|
|
gst_object_sync_values (G_OBJECT (pad), stream_time);
|
|
|
|
mix->blend (GST_BUFFER_DATA (mixcol->buffer),
|
|
pad->xpos, pad->ypos, pad->in_width, pad->in_height, pad->alpha,
|
|
GST_BUFFER_DATA (outbuf), mix->out_width, mix->out_height);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* remove buffers from the queue that were expired in the
|
|
* interval of the master, we also prepare the queued value
|
|
* in the pad so that we can skip and fill buffers later on */
|
|
static void
|
|
gst_videomixer_update_queues (GstVideoMixer * mix)
|
|
{
|
|
GSList *walk;
|
|
gint64 interval;
|
|
|
|
interval = mix->master->queued;
|
|
if (interval <= 0) {
|
|
if (mix->fps_n == 0) {
|
|
interval = G_MAXINT64;
|
|
} else {
|
|
interval = gst_util_uint64_scale_int (GST_SECOND, mix->fps_d, mix->fps_n);
|
|
}
|
|
GST_LOG_OBJECT (mix, "set interval to %" G_GINT64_FORMAT " nanoseconds",
|
|
interval);
|
|
}
|
|
|
|
walk = mix->sinkpads;
|
|
while (walk) {
|
|
GstVideoMixerPad *pad = GST_VIDEO_MIXER_PAD (walk->data);
|
|
GstVideoMixerCollect *mixcol = pad->mixcol;
|
|
|
|
walk = g_slist_next (walk);
|
|
|
|
if (mixcol->buffer != NULL) {
|
|
pad->queued -= interval;
|
|
GST_LOG_OBJECT (pad, "queued now %" G_GINT64_FORMAT, pad->queued);
|
|
if (pad->queued <= 0) {
|
|
GstBuffer *buffer =
|
|
gst_collect_pads_pop (mix->collect, &mixcol->collect);
|
|
|
|
GST_LOG_OBJECT (pad, "unreffing buffer");
|
|
if (buffer)
|
|
gst_buffer_unref (buffer);
|
|
else
|
|
GST_WARNING_OBJECT (pad,
|
|
"Buffer was removed by GstCollectPads in the meantime");
|
|
|
|
gst_buffer_unref (mixcol->buffer);
|
|
mixcol->buffer = NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_videomixer_collected (GstCollectPads * pads, GstVideoMixer * mix)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstBuffer *outbuf = NULL;
|
|
size_t outsize = 0;
|
|
gboolean eos = FALSE;
|
|
GstClockTime timestamp = GST_CLOCK_TIME_NONE;
|
|
GstClockTime duration = GST_CLOCK_TIME_NONE;
|
|
|
|
g_return_val_if_fail (GST_IS_VIDEO_MIXER (mix), GST_FLOW_ERROR);
|
|
|
|
/* This must be set, otherwise we have no caps */
|
|
if (G_UNLIKELY (mix->in_width == 0))
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
|
|
if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE, FALSE)) {
|
|
GST_DEBUG_OBJECT (mix, "pending flush stop");
|
|
gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop ());
|
|
}
|
|
|
|
GST_LOG_OBJECT (mix, "all pads are collected");
|
|
GST_VIDEO_MIXER_STATE_LOCK (mix);
|
|
|
|
eos = gst_videomixer_fill_queues (mix);
|
|
|
|
if (eos) {
|
|
/* Push EOS downstream */
|
|
GST_LOG_OBJECT (mix, "all our sinkpads are EOS, pushing downstream");
|
|
gst_pad_push_event (mix->srcpad, gst_event_new_eos ());
|
|
ret = GST_FLOW_WRONG_STATE;
|
|
goto error;
|
|
}
|
|
|
|
/* If geometry has changed we need to set new caps on the buffer */
|
|
if (mix->in_width != mix->out_width || mix->in_height != mix->out_height
|
|
|| mix->setcaps) {
|
|
GstCaps *newcaps = NULL;
|
|
|
|
newcaps = gst_caps_make_writable
|
|
(gst_pad_get_negotiated_caps (GST_PAD (mix->master)));
|
|
gst_caps_set_simple (newcaps,
|
|
"width", G_TYPE_INT, mix->in_width,
|
|
"height", G_TYPE_INT, mix->in_height, NULL);
|
|
|
|
mix->out_width = mix->in_width;
|
|
mix->out_height = mix->in_height;
|
|
mix->setcaps = FALSE;
|
|
|
|
/* Calculating out buffer size from input size */
|
|
gst_pad_set_caps (mix->srcpad, newcaps);
|
|
gst_caps_unref (newcaps);
|
|
}
|
|
|
|
/* Get timestamp & duration */
|
|
if (mix->master->mixcol->buffer != NULL) {
|
|
GstClockTime in_ts;
|
|
GstSegment *seg;
|
|
GstVideoMixerCollect *mixcol = mix->master->mixcol;
|
|
|
|
seg = &mixcol->collect.segment;
|
|
in_ts = GST_BUFFER_TIMESTAMP (mixcol->buffer);
|
|
|
|
timestamp = gst_segment_to_running_time (seg, GST_FORMAT_TIME, in_ts);
|
|
duration = GST_BUFFER_DURATION (mixcol->buffer);
|
|
|
|
mix->last_ts = timestamp;
|
|
mix->last_duration = duration;
|
|
} else {
|
|
timestamp = mix->last_ts;
|
|
duration = mix->last_duration;
|
|
}
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (duration))
|
|
mix->last_ts += duration;
|
|
|
|
if (!gst_videomixer_do_qos (mix, timestamp)) {
|
|
gst_videomixer_update_queues (mix);
|
|
GST_VIDEO_MIXER_STATE_UNLOCK (mix);
|
|
ret = GST_FLOW_OK;
|
|
goto beach;
|
|
}
|
|
|
|
/* allocate an output buffer */
|
|
outsize =
|
|
gst_video_format_get_size (mix->fmt, mix->out_width, mix->out_height);
|
|
ret =
|
|
gst_pad_alloc_buffer_and_set_caps (mix->srcpad, GST_BUFFER_OFFSET_NONE,
|
|
outsize, GST_PAD_CAPS (mix->srcpad), &outbuf);
|
|
|
|
/* This must be set at this point, otherwise we have no src caps */
|
|
g_assert (mix->blend != NULL);
|
|
|
|
if (ret != GST_FLOW_OK) {
|
|
goto error;
|
|
}
|
|
|
|
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
|
|
GST_BUFFER_DURATION (outbuf) = duration;
|
|
|
|
switch (mix->background) {
|
|
case VIDEO_MIXER_BACKGROUND_CHECKER:
|
|
mix->fill_checker (GST_BUFFER_DATA (outbuf), mix->out_width,
|
|
mix->out_height);
|
|
break;
|
|
case VIDEO_MIXER_BACKGROUND_BLACK:
|
|
mix->fill_color (GST_BUFFER_DATA (outbuf), mix->out_width,
|
|
mix->out_height, 16, 128, 128);
|
|
break;
|
|
case VIDEO_MIXER_BACKGROUND_WHITE:
|
|
mix->fill_color (GST_BUFFER_DATA (outbuf), mix->out_width,
|
|
mix->out_height, 240, 128, 128);
|
|
break;
|
|
}
|
|
|
|
gst_videomixer_blend_buffers (mix, outbuf);
|
|
|
|
gst_videomixer_update_queues (mix);
|
|
GST_VIDEO_MIXER_STATE_UNLOCK (mix);
|
|
|
|
ret = gst_pad_push (mix->srcpad, outbuf);
|
|
|
|
beach:
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
error:
|
|
{
|
|
if (outbuf)
|
|
gst_buffer_unref (outbuf);
|
|
|
|
GST_VIDEO_MIXER_STATE_UNLOCK (mix);
|
|
goto beach;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
forward_event_func (GstPad * pad, GValue * ret, GstEvent * event)
|
|
{
|
|
gst_event_ref (event);
|
|
GST_LOG_OBJECT (pad, "About to send event %s", GST_EVENT_TYPE_NAME (event));
|
|
if (!gst_pad_push_event (pad, event)) {
|
|
g_value_set_boolean (ret, FALSE);
|
|
GST_WARNING_OBJECT (pad, "Sending event %p (%s) failed.",
|
|
event, GST_EVENT_TYPE_NAME (event));
|
|
} else {
|
|
GST_LOG_OBJECT (pad, "Sent event %p (%s).",
|
|
event, GST_EVENT_TYPE_NAME (event));
|
|
}
|
|
gst_object_unref (pad);
|
|
return TRUE;
|
|
}
|
|
|
|
/* forwards the event to all sinkpads, takes ownership of the
|
|
* event
|
|
*
|
|
* Returns: TRUE if the event could be forwarded on all
|
|
* sinkpads.
|
|
*/
|
|
static gboolean
|
|
forward_event (GstVideoMixer * mix, GstEvent * event)
|
|
{
|
|
GstIterator *it;
|
|
GValue vret = { 0 };
|
|
|
|
GST_LOG_OBJECT (mix, "Forwarding event %p (%s)", event,
|
|
GST_EVENT_TYPE_NAME (event));
|
|
|
|
g_value_init (&vret, G_TYPE_BOOLEAN);
|
|
g_value_set_boolean (&vret, TRUE);
|
|
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
|
|
gst_iterator_fold (it, (GstIteratorFoldFunction) forward_event_func, &vret,
|
|
event);
|
|
gst_iterator_free (it);
|
|
gst_event_unref (event);
|
|
|
|
return g_value_get_boolean (&vret);
|
|
}
|
|
|
|
static gboolean
|
|
gst_videomixer_src_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstVideoMixer *mix = GST_VIDEO_MIXER (gst_pad_get_parent (pad));
|
|
gboolean result;
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_QOS:{
|
|
GstClockTimeDiff diff;
|
|
GstClockTime timestamp;
|
|
gdouble proportion;
|
|
|
|
gst_event_parse_qos (event, &proportion, &diff, ×tamp);
|
|
|
|
gst_videomixer_update_qos (mix, proportion, diff, timestamp);
|
|
gst_event_unref (event);
|
|
|
|
/* TODO: The QoS event should be transformed and send upstream */
|
|
result = TRUE;
|
|
break;
|
|
}
|
|
case GST_EVENT_SEEK:
|
|
{
|
|
GstSeekFlags flags;
|
|
GstSeekType curtype;
|
|
gint64 cur;
|
|
|
|
/* parse the seek parameters */
|
|
gst_event_parse_seek (event, NULL, NULL, &flags, &curtype,
|
|
&cur, NULL, NULL);
|
|
|
|
/* check if we are flushing */
|
|
if (flags & GST_SEEK_FLAG_FLUSH) {
|
|
/* make sure we accept nothing anymore and return WRONG_STATE */
|
|
gst_collect_pads_set_flushing (mix->collect, TRUE);
|
|
|
|
/* flushing seek, start flush downstream, the flush will be done
|
|
* when all pads received a FLUSH_STOP. */
|
|
gst_pad_push_event (mix->srcpad, gst_event_new_flush_start ());
|
|
}
|
|
|
|
/* now wait for the collected to be finished and mark a new
|
|
* segment */
|
|
GST_OBJECT_LOCK (mix->collect);
|
|
if (curtype == GST_SEEK_TYPE_SET)
|
|
mix->segment_position = cur;
|
|
else
|
|
mix->segment_position = 0;
|
|
mix->sendseg = TRUE;
|
|
|
|
if (flags & GST_SEEK_FLAG_FLUSH) {
|
|
gst_collect_pads_set_flushing (mix->collect, FALSE);
|
|
|
|
/* we can't send FLUSH_STOP here since upstream could start pushing data
|
|
* after we unlock mix->collect.
|
|
* We set flush_stop_pending to TRUE instead and send FLUSH_STOP after
|
|
* forwarding the seek upstream or from gst_videomixer_collected,
|
|
* whichever happens first.
|
|
*/
|
|
mix->flush_stop_pending = TRUE;
|
|
}
|
|
|
|
GST_OBJECT_UNLOCK (mix->collect);
|
|
gst_videomixer_reset_qos (mix);
|
|
|
|
result = forward_event (mix, event);
|
|
|
|
if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending,
|
|
TRUE, FALSE)) {
|
|
GST_DEBUG_OBJECT (mix, "pending flush stop");
|
|
gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop ());
|
|
}
|
|
|
|
break;
|
|
}
|
|
case GST_EVENT_NAVIGATION:
|
|
/* navigation is rather pointless. */
|
|
result = FALSE;
|
|
break;
|
|
default:
|
|
/* just forward the rest for now */
|
|
result = forward_event (mix, event);
|
|
break;
|
|
}
|
|
gst_object_unref (mix);
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_videomixer_sink_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstVideoMixerPad *vpad = GST_VIDEO_MIXER_PAD (pad);
|
|
GstVideoMixer *videomixer = GST_VIDEO_MIXER (gst_pad_get_parent (pad));
|
|
gboolean ret;
|
|
|
|
GST_DEBUG_OBJECT (pad, "Got %s event on pad %s:%s",
|
|
GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_STOP:
|
|
/* mark a pending new segment. This event is synchronized
|
|
* with the streaming thread so we can safely update the
|
|
* variable without races. It's somewhat weird because we
|
|
* assume the collectpads forwarded the FLUSH_STOP past us
|
|
* and downstream (using our source pad, the bastard!).
|
|
*/
|
|
videomixer->sendseg = TRUE;
|
|
videomixer->flush_stop_pending = FALSE;
|
|
gst_videomixer_reset_qos (videomixer);
|
|
|
|
/* Reset pad state after FLUSH_STOP */
|
|
if (vpad->mixcol->buffer)
|
|
gst_buffer_unref (vpad->mixcol->buffer);
|
|
vpad->mixcol->buffer = NULL;
|
|
vpad->queued = 0;
|
|
break;
|
|
case GST_EVENT_NEWSEGMENT:
|
|
videomixer->sendseg = TRUE;
|
|
gst_videomixer_reset_qos (videomixer);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* now GstCollectPads can take care of the rest, e.g. EOS */
|
|
ret = videomixer->collect_event (pad, event);
|
|
|
|
gst_object_unref (videomixer);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_videomixer_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstVideoMixer *mix = GST_VIDEO_MIXER (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_BACKGROUND:
|
|
g_value_set_enum (value, mix->background);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_videomixer_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstVideoMixer *mix = GST_VIDEO_MIXER (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_BACKGROUND:
|
|
mix->background = g_value_get_enum (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_videomixer_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstVideoMixer *mix;
|
|
GstStateChangeReturn ret;
|
|
|
|
g_return_val_if_fail (GST_IS_VIDEO_MIXER (element), GST_STATE_CHANGE_FAILURE);
|
|
|
|
mix = GST_VIDEO_MIXER (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
GST_LOG_OBJECT (mix, "starting collectpads");
|
|
gst_collect_pads_start (mix->collect);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
GST_LOG_OBJECT (mix, "stopping collectpads");
|
|
gst_collect_pads_stop (mix->collect);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_videomixer_reset (mix);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (gst_videomixer_debug, "videomixer", 0,
|
|
"video mixer");
|
|
|
|
gst_video_mixer_init_blend ();
|
|
|
|
return gst_element_register (plugin, "videomixer", GST_RANK_PRIMARY,
|
|
GST_TYPE_VIDEO_MIXER);
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"videomixer",
|
|
"Video mixer", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,
|
|
GST_PACKAGE_ORIGIN)
|