mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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gl: new glmixerbin element
This commit is contained in:
Matthew Waters
parent
d175b0be59
commit
bf7409b831
2 changed files with 642 additions and 0 deletions
570
ext/gl/gstglmixerbin.c
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570
ext/gl/gstglmixerbin.c
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/*
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*
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* GStreamer
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* Copyright (C) 2015 Matthew Waters <matthew@centricular.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 St, Fifth Floor,
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* Boston, MA 02110-1301, 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 "gstglmixerbin.h"
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#define GST_CAT_DEFAULT gst_gl_mixer_bin_debug
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GST_DEBUG_CATEGORY (gst_gl_mixer_bin_debug);
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#define DEFAULT_LATENCY 0
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struct input_chain
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{
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GstGLMixerBin *self;
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GstGhostPad *ghost_pad;
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GstElement *upload;
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GstElement *in_convert;
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GstPad *mixer_pad;
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};
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static void
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_free_input_chain (struct input_chain *chain)
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{
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if (!chain)
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return;
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if (chain->ghost_pad)
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gst_object_unref (chain->ghost_pad);
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chain->ghost_pad = NULL;
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if (chain->upload) {
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gst_bin_remove (GST_BIN (chain->self), chain->upload);
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gst_object_unref (chain->upload);
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chain->upload = NULL;
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}
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if (chain->in_convert) {
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gst_bin_remove (GST_BIN (chain->self), chain->in_convert);
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gst_object_unref (chain->in_convert);
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chain->in_convert = NULL;
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}
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if (chain->mixer_pad) {
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gst_element_release_request_pad (chain->self->mixer, chain->mixer_pad);
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gst_object_unref (chain->mixer_pad);
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chain->mixer_pad = NULL;
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}
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g_free (chain);
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}
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struct _GstGLMixerBinPrivate
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{
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gboolean running;
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GList *input_chains;
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};
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enum
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{
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PROP_0,
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PROP_MIXER,
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PROP_LATENCY,
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};
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enum
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{
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SIGNAL_0,
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SIGNAL_CREATE_ELEMENT,
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LAST_SIGNAL
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};
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static void gst_gl_mixer_bin_child_proxy_init (gpointer g_iface,
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gpointer iface_data);
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#define GST_GL_MIXER_BIN_GET_PRIVATE(o) \
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(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_TYPE_GL_MIXER_BIN, GstGLMixerBinPrivate))
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G_DEFINE_TYPE_WITH_CODE (GstGLMixerBin, gst_gl_mixer_bin, GST_TYPE_BIN,
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G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY,
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gst_gl_mixer_bin_child_proxy_init));
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static guint gst_gl_mixer_bin_signals[LAST_SIGNAL] = { 0 };
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static GstStaticPadTemplate src_factory = 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(ANY)")
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);
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS ("video/x-raw(ANY)")
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);
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static void gst_gl_mixer_bin_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_gl_mixer_bin_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_gl_mixer_bin_dispose (GObject * object);
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static GstPad *gst_gl_mixer_bin_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps);
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static void gst_gl_mixer_bin_release_pad (GstElement * element, GstPad * pad);
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static GstStateChangeReturn gst_gl_mixer_bin_change_state (GstElement *
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element, GstStateChange transition);
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static void
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gst_gl_mixer_bin_class_init (GstGLMixerBinClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GstGLMixerBinPrivate));
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixerbin", 0,
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"opengl mixer bin");
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element_class->request_new_pad = gst_gl_mixer_bin_request_new_pad;
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element_class->release_pad = gst_gl_mixer_bin_release_pad;
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element_class->change_state = gst_gl_mixer_bin_change_state;
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gobject_class->get_property = gst_gl_mixer_bin_get_property;
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gobject_class->set_property = gst_gl_mixer_bin_set_property;
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_gl_mixer_bin_dispose);
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g_object_class_install_property (gobject_class, PROP_MIXER,
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g_param_spec_object ("mixer",
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"GL mixer element",
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"The GL mixer chain to use",
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GST_TYPE_ELEMENT,
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GST_PARAM_MUTABLE_READY | G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_LATENCY,
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g_param_spec_int64 ("latency", "Buffer latency",
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"Additional latency in live mode to allow upstream "
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"to take longer to produce buffers for the current "
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"position", 0,
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(G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
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DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstMixerBin::create-element:
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* @object: the #GstGLMixerBin
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*
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* Will be emitted when we need the processing element/s that this bin will use
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*
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* Returns: a new #GstElement
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*/
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gst_gl_mixer_bin_signals[SIGNAL_CREATE_ELEMENT] =
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g_signal_new ("create-element", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
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GST_TYPE_ELEMENT, 0);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_factory));
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}
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static void
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gst_gl_mixer_bin_init (GstGLMixerBin * self)
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{
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gboolean res = TRUE;
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GstPad *pad;
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self->priv = GST_GL_MIXER_BIN_GET_PRIVATE (self);
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self->out_convert = gst_element_factory_make ("glcolorconvert", NULL);
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self->download = gst_element_factory_make ("gldownload", NULL);
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res &= gst_bin_add (GST_BIN (self), self->out_convert);
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res &= gst_bin_add (GST_BIN (self), self->download);
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res &=
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gst_element_link_pads (self->out_convert, "src", self->download, "sink");
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pad = gst_element_get_static_pad (self->download, "src");
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if (!pad) {
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res = FALSE;
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} else {
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GST_DEBUG_OBJECT (self, "setting target src pad %" GST_PTR_FORMAT, pad);
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self->srcpad = gst_ghost_pad_new ("src", pad);
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gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
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gst_object_unref (pad);
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}
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if (!res)
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GST_ERROR_OBJECT (self, "failed to create output chain");
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}
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static void
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gst_gl_mixer_bin_dispose (GObject * object)
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{
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GstGLMixerBin *self = GST_GL_MIXER_BIN (object);
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GList *l = self->priv->input_chains;
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while (l) {
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struct input_chain *chain = l->data;
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if (self->mixer && chain->mixer_pad) {
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gst_element_release_request_pad (GST_ELEMENT (self->mixer),
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chain->mixer_pad);
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gst_object_unref (chain->mixer_pad);
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chain->mixer_pad = NULL;
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}
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l = l->next;
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}
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g_list_free_full (self->priv->input_chains, (GDestroyNotify) g_free);
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G_OBJECT_CLASS (gst_gl_mixer_bin_parent_class)->dispose (object);
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}
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static gboolean
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_create_input_chain (GstGLMixerBin * self, struct input_chain *chain,
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GstPad * mixer_pad)
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{
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GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
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GstPad *pad;
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gboolean res = TRUE;
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gchar *name;
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chain->self = self;
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chain->mixer_pad = mixer_pad;
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chain->upload = gst_element_factory_make ("glupload", NULL);
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chain->in_convert = gst_element_factory_make ("glcolorconvert", NULL);
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res &= gst_bin_add (GST_BIN (self), chain->in_convert);
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res &= gst_bin_add (GST_BIN (self), chain->upload);
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pad = gst_element_get_static_pad (chain->in_convert, "src");
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if (gst_pad_link (pad, mixer_pad) != GST_PAD_LINK_OK) {
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gst_object_unref (pad);
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return FALSE;
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}
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gst_object_unref (pad);
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res &=
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gst_element_link_pads (chain->upload, "src", chain->in_convert, "sink");
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pad = gst_element_get_static_pad (chain->upload, "sink");
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if (!pad) {
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return FALSE;
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} else {
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GST_DEBUG_OBJECT (self, "setting target sink pad %" GST_PTR_FORMAT, pad);
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name = gst_object_get_name (GST_OBJECT (mixer_pad));
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if (klass->create_input_pad) {
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chain->ghost_pad = klass->create_input_pad (self, chain->mixer_pad);
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gst_object_set_name (GST_OBJECT (chain->ghost_pad), name);
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gst_ghost_pad_set_target (chain->ghost_pad, pad);
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} else {
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chain->ghost_pad =
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GST_GHOST_PAD (gst_ghost_pad_new (GST_PAD_NAME (chain->mixer_pad),
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pad));
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}
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g_free (name);
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GST_OBJECT_LOCK (self);
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if (self->priv->running)
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gst_pad_set_active (GST_PAD (chain->ghost_pad), TRUE);
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GST_OBJECT_UNLOCK (self);
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gst_element_add_pad (GST_ELEMENT_CAST (self), GST_PAD (chain->ghost_pad));
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gst_object_unref (pad);
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}
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gst_element_sync_state_with_parent (chain->upload);
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gst_element_sync_state_with_parent (chain->in_convert);
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return TRUE;
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}
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static GstPadTemplate *
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_find_element_pad_template (GstElement * element,
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GstPadDirection direction, GstPadPresence presence)
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{
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GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
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GList *templ_list = gst_element_class_get_pad_template_list (klass);
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GstPadTemplate *templ;
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/* find suitable template */
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while (templ_list) {
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templ = (GstPadTemplate *) templ_list->data;
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if (GST_PAD_TEMPLATE_DIRECTION (templ) != direction
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|| GST_PAD_TEMPLATE_PRESENCE (templ) != presence) {
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templ_list = templ_list->next;
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templ = NULL;
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continue;
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}
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break;
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}
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return templ;
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}
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static gboolean
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_connect_mixer_element (GstGLMixerBin * self)
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{
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gboolean res = TRUE;
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g_return_val_if_fail (self->priv->input_chains == NULL, FALSE);
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gst_object_set_name (GST_OBJECT (self->mixer), "mixer");
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res &= gst_bin_add (GST_BIN (self), self->mixer);
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res &= gst_element_link_pads (self->mixer, "src", self->out_convert, "sink");
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if (!res)
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GST_ERROR_OBJECT (self, "Failed to link mixer element into the pipeline");
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gst_element_sync_state_with_parent (self->mixer);
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return res;
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}
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void
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gst_gl_mixer_bin_finish_init_with_element (GstGLMixerBin * self,
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GstElement * element)
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{
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g_return_if_fail (GST_IS_ELEMENT (element));
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self->mixer = element;
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if (!_connect_mixer_element (self)) {
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gst_object_unref (self->mixer);
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self->mixer = NULL;
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}
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}
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void
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gst_gl_mixer_bin_finish_init (GstGLMixerBin * self)
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{
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GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
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GstElement *element = NULL;
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if (klass->create_element)
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element = klass->create_element ();
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if (element)
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gst_gl_mixer_bin_finish_init_with_element (self, element);
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}
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static void
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gst_gl_mixer_bin_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstGLMixerBin *self = GST_GL_MIXER_BIN (object);
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switch (prop_id) {
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case PROP_MIXER:
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g_value_set_object (value, self->mixer);
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break;
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default:
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if (self->mixer)
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g_object_get_property (G_OBJECT (self->mixer), pspec->name, value);
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break;
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}
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}
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static void
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gst_gl_mixer_bin_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstGLMixerBin *self = GST_GL_MIXER_BIN (object);
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switch (prop_id) {
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case PROP_MIXER:
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{
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GstElement *mixer = g_value_get_object (value);
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/* FIXME: deal with replacing a mixer */
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g_return_if_fail (!self->mixer || (self->mixer == mixer));
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self->mixer = mixer;
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if (mixer)
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_connect_mixer_element (self);
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break;
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}
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default:
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if (self->mixer)
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g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
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break;
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}
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}
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static GstPad *
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gst_gl_mixer_bin_request_new_pad (GstElement * element, GstPadTemplate * templ,
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const gchar * req_name, const GstCaps * caps)
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{
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GstGLMixerBin *self = GST_GL_MIXER_BIN (element);
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GstPadTemplate *mixer_templ;
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struct input_chain *chain;
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GstPad *mixer_pad;
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chain = g_new0 (struct input_chain, 1);
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mixer_templ = _find_element_pad_template (self->mixer,
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GST_PAD_TEMPLATE_DIRECTION (templ), GST_PAD_TEMPLATE_PRESENCE (templ));
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g_return_val_if_fail (mixer_templ, NULL);
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mixer_pad =
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gst_element_request_pad (self->mixer, mixer_templ, req_name, NULL);
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gst_object_unref (mixer_templ);
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g_return_val_if_fail (mixer_pad, NULL);
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if (!_create_input_chain (self, chain, mixer_pad)) {
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gst_element_release_request_pad (self->mixer, mixer_pad);
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_free_input_chain (chain);
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return NULL;
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}
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GST_OBJECT_LOCK (element);
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self->priv->input_chains = g_list_prepend (self->priv->input_chains, chain);
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GST_OBJECT_UNLOCK (element);
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gst_child_proxy_child_added (GST_CHILD_PROXY (self),
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G_OBJECT (chain->ghost_pad), GST_OBJECT_NAME (chain->ghost_pad));
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return GST_PAD (chain->ghost_pad);
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}
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static void
|
||||
gst_gl_mixer_bin_release_pad (GstElement * element, GstPad * pad)
|
||||
{
|
||||
GstGLMixerBin *self = GST_GL_MIXER_BIN (element);
|
||||
GList *l = self->priv->input_chains;
|
||||
|
||||
GST_OBJECT_LOCK (element);
|
||||
while (l) {
|
||||
struct input_chain *chain = l->data;
|
||||
if (chain->mixer_pad == pad) {
|
||||
_free_input_chain (chain);
|
||||
self->priv->input_chains =
|
||||
g_list_remove_link (self->priv->input_chains, l);
|
||||
break;
|
||||
}
|
||||
l = l->next;
|
||||
}
|
||||
GST_OBJECT_UNLOCK (element);
|
||||
|
||||
gst_element_remove_pad (element, pad);
|
||||
}
|
||||
|
||||
static GstStateChangeReturn
|
||||
gst_gl_mixer_bin_change_state (GstElement * element, GstStateChange transition)
|
||||
{
|
||||
GstGLMixerBin *self = GST_GL_MIXER_BIN (element);
|
||||
GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
|
||||
GstStateChangeReturn ret;
|
||||
|
||||
switch (transition) {
|
||||
case GST_STATE_CHANGE_NULL_TO_READY:
|
||||
GST_OBJECT_LOCK (element);
|
||||
if (!self->mixer) {
|
||||
if (klass->create_element)
|
||||
self->mixer = klass->create_element ();
|
||||
|
||||
if (!self->mixer)
|
||||
g_signal_emit (element,
|
||||
gst_gl_mixer_bin_signals[SIGNAL_CREATE_ELEMENT], 0, &self->mixer);
|
||||
|
||||
if (!self->mixer) {
|
||||
GST_ERROR_OBJECT (element, "Failed to retreive element");
|
||||
GST_OBJECT_UNLOCK (element);
|
||||
return GST_STATE_CHANGE_FAILURE;
|
||||
}
|
||||
GST_OBJECT_UNLOCK (element);
|
||||
if (!_connect_mixer_element (self))
|
||||
return GST_STATE_CHANGE_FAILURE;
|
||||
|
||||
GST_OBJECT_LOCK (element);
|
||||
}
|
||||
self->priv->running = TRUE;
|
||||
GST_OBJECT_UNLOCK (element);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
ret =
|
||||
GST_ELEMENT_CLASS (gst_gl_mixer_bin_parent_class)->change_state (element,
|
||||
transition);
|
||||
if (ret == GST_STATE_CHANGE_FAILURE)
|
||||
return ret;
|
||||
|
||||
switch (transition) {
|
||||
case GST_STATE_CHANGE_READY_TO_NULL:
|
||||
GST_OBJECT_LOCK (self);
|
||||
self->priv->running = FALSE;
|
||||
GST_OBJECT_UNLOCK (self);
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static GObject *
|
||||
gst_gl_mixer_bin_child_proxy_get_child_by_index (GstChildProxy * child_proxy,
|
||||
guint index)
|
||||
{
|
||||
GstGLMixerBin *mixer = GST_GL_MIXER_BIN (child_proxy);
|
||||
GstBin *bin = GST_BIN_CAST (child_proxy);
|
||||
GObject *res = NULL;
|
||||
|
||||
GST_OBJECT_LOCK (bin);
|
||||
/* XXX: not exactly thread safe with ordering */
|
||||
if (index < bin->numchildren) {
|
||||
if ((res = g_list_nth_data (bin->children, index)))
|
||||
gst_object_ref (res);
|
||||
} else {
|
||||
struct input_chain *chain;
|
||||
if ((chain =
|
||||
g_list_nth_data (mixer->priv->input_chains,
|
||||
index - bin->numchildren))) {
|
||||
res = gst_object_ref (chain->ghost_pad);
|
||||
}
|
||||
}
|
||||
GST_OBJECT_UNLOCK (bin);
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
static guint
|
||||
gst_gl_mixer_bin_child_proxy_get_children_count (GstChildProxy * child_proxy)
|
||||
{
|
||||
GstGLMixerBin *mixer = GST_GL_MIXER_BIN (child_proxy);
|
||||
GstBin *bin = GST_BIN_CAST (child_proxy);
|
||||
guint num;
|
||||
|
||||
GST_OBJECT_LOCK (bin);
|
||||
num = bin->numchildren + g_list_length (mixer->priv->input_chains);
|
||||
GST_OBJECT_UNLOCK (bin);
|
||||
|
||||
return num;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_gl_mixer_bin_child_proxy_init (gpointer g_iface, gpointer iface_data)
|
||||
{
|
||||
GstChildProxyInterface *iface = g_iface;
|
||||
|
||||
iface->get_children_count = gst_gl_mixer_bin_child_proxy_get_children_count;
|
||||
iface->get_child_by_index = gst_gl_mixer_bin_child_proxy_get_child_by_index;
|
||||
}
|
||||
72
ext/gl/gstglmixerbin.h
Normal file
72
ext/gl/gstglmixerbin.h
Normal file
|
|
@ -0,0 +1,72 @@
|
|||
/*
|
||||
* GStreamer
|
||||
* Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Library General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Library General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Library General Public
|
||||
* License along with this library; if not, write to the
|
||||
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
||||
* Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
|
||||
#ifndef __GST_GL_MIXER_BIN_H__
|
||||
#define __GST_GL_MIXER_BIN_H__
|
||||
|
||||
#include <gst/gst.h>
|
||||
#include <gst/video/video.h>
|
||||
#include <gst/gl/gl.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
GType gst_gl_mixer_bin_get_type(void);
|
||||
#define GST_TYPE_GL_MIXER_BIN (gst_gl_mixer_bin_get_type())
|
||||
#define GST_GL_MIXER_BIN(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_MIXER_BIN, GstGLMixerBin))
|
||||
#define GST_GL_MIXER_BIN_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GL_MIXER_BIN, GstGLMixerBinClass))
|
||||
#define GST_IS_GL_MIXER_BIN(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_MIXER_BIN))
|
||||
#define GST_IS_GL_MIXER_BIN_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GL_MIXER_BIN))
|
||||
#define GST_GL_MIXER_BIN_GET_CLASS(obj) \
|
||||
(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_GL_MIXER_BIN,GstGLMixerBinClass))
|
||||
|
||||
typedef struct _GstGLMixerBin GstGLMixerBin;
|
||||
typedef struct _GstGLMixerBinClass GstGLMixerBinClass;
|
||||
typedef struct _GstGLMixerBinPrivate GstGLMixerBinPrivate;
|
||||
|
||||
struct _GstGLMixerBin
|
||||
{
|
||||
GstBin parent;
|
||||
|
||||
GstElement *mixer;
|
||||
GstElement *out_convert;
|
||||
GstElement *download;
|
||||
GstPad *srcpad;
|
||||
|
||||
GstGLMixerBinPrivate *priv;
|
||||
};
|
||||
|
||||
struct _GstGLMixerBinClass
|
||||
{
|
||||
GstBinClass parent_class;
|
||||
|
||||
GstElement * (*create_element) (void);
|
||||
GstGhostPad * (*create_input_pad) (GstGLMixerBin * self, GstPad * mixer_pad);
|
||||
};
|
||||
|
||||
void gst_gl_mixer_bin_finish_init (GstGLMixerBin * self);
|
||||
void gst_gl_mixer_bin_finish_init_with_element (GstGLMixerBin * self,
|
||||
GstElement * element);
|
||||
|
||||
G_END_DECLS
|
||||
#endif /* __GST_GL_MIXER_BIN_H__ */
|
||||
Loading…
Reference in a new issue