Commit e85c7f84 authored by Matthew Waters's avatar Matthew Waters 🐨 Committed by Tim-Philipp Müller

gl: new glmixerbin element

parent 1b0d2b13
......@@ -7,6 +7,7 @@ libgstopengl_la_SOURCES = \
gstgldownloadelement.c \
gstglcolorconvertelement.c \
gstglfilterbin.c \
gstglmixerbin.c \
gstglsinkbin.c \
gstglimagesink.c \
gstglfiltercube.c \
......@@ -27,6 +28,7 @@ noinst_HEADERS = \
gstgldownloadelement.h \
gstglcolorconvertelement.h \
gstglfilterbin.h \
gstglmixerbin.h \
gstglsinkbin.h \
gstglimagesink.h \
gstglfiltercube.h \
......
/*
*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include "gstglmixerbin.h"
#define GST_CAT_DEFAULT gst_gl_mixer_bin_debug
GST_DEBUG_CATEGORY (gst_gl_mixer_bin_debug);
#define DEFAULT_LATENCY 0
struct input_chain
{
GstGLMixerBin *self;
GstGhostPad *ghost_pad;
GstElement *upload;
GstElement *in_convert;
GstPad *mixer_pad;
};
static void
_free_input_chain (struct input_chain *chain)
{
if (!chain)
return;
if (chain->ghost_pad)
gst_object_unref (chain->ghost_pad);
chain->ghost_pad = NULL;
if (chain->upload) {
gst_bin_remove (GST_BIN (chain->self), chain->upload);
gst_object_unref (chain->upload);
chain->upload = NULL;
}
if (chain->in_convert) {
gst_bin_remove (GST_BIN (chain->self), chain->in_convert);
gst_object_unref (chain->in_convert);
chain->in_convert = NULL;
}
if (chain->mixer_pad) {
gst_element_release_request_pad (chain->self->mixer, chain->mixer_pad);
gst_object_unref (chain->mixer_pad);
chain->mixer_pad = NULL;
}
g_free (chain);
}
struct _GstGLMixerBinPrivate
{
gboolean running;
GList *input_chains;
};
enum
{
PROP_0,
PROP_MIXER,
PROP_LATENCY,
};
enum
{
SIGNAL_0,
SIGNAL_CREATE_ELEMENT,
LAST_SIGNAL
};
static void gst_gl_mixer_bin_child_proxy_init (gpointer g_iface,
gpointer iface_data);
#define GST_GL_MIXER_BIN_GET_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_TYPE_GL_MIXER_BIN, GstGLMixerBinPrivate))
G_DEFINE_TYPE_WITH_CODE (GstGLMixerBin, gst_gl_mixer_bin, GST_TYPE_BIN,
G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY,
gst_gl_mixer_bin_child_proxy_init));
static guint gst_gl_mixer_bin_signals[LAST_SIGNAL] = { 0 };
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw(ANY)")
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("video/x-raw(ANY)")
);
static void gst_gl_mixer_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_mixer_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_gl_mixer_bin_dispose (GObject * object);
static GstPad *gst_gl_mixer_bin_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps);
static void gst_gl_mixer_bin_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn gst_gl_mixer_bin_change_state (GstElement *
element, GstStateChange transition);
static void
gst_gl_mixer_bin_class_init (GstGLMixerBinClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
g_type_class_add_private (klass, sizeof (GstGLMixerBinPrivate));
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixerbin", 0,
"opengl mixer bin");
element_class->request_new_pad = gst_gl_mixer_bin_request_new_pad;
element_class->release_pad = gst_gl_mixer_bin_release_pad;
element_class->change_state = gst_gl_mixer_bin_change_state;
gobject_class->get_property = gst_gl_mixer_bin_get_property;
gobject_class->set_property = gst_gl_mixer_bin_set_property;
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_gl_mixer_bin_dispose);
g_object_class_install_property (gobject_class, PROP_MIXER,
g_param_spec_object ("mixer",
"GL mixer element",
"The GL mixer chain to use",
GST_TYPE_ELEMENT,
GST_PARAM_MUTABLE_READY | G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_LATENCY,
g_param_spec_int64 ("latency", "Buffer latency",
"Additional latency in live mode to allow upstream "
"to take longer to produce buffers for the current "
"position", 0,
(G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstMixerBin::create-element:
* @object: the #GstGLMixerBin
*
* Will be emitted when we need the processing element/s that this bin will use
*
* Returns: a new #GstElement
*/
gst_gl_mixer_bin_signals[SIGNAL_CREATE_ELEMENT] =
g_signal_new ("create-element", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
GST_TYPE_ELEMENT, 0);
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));
}
static void
gst_gl_mixer_bin_init (GstGLMixerBin * self)
{
gboolean res = TRUE;
GstPad *pad;
self->priv = GST_GL_MIXER_BIN_GET_PRIVATE (self);
self->out_convert = gst_element_factory_make ("glcolorconvert", NULL);
self->download = gst_element_factory_make ("gldownload", NULL);
res &= gst_bin_add (GST_BIN (self), self->out_convert);
res &= gst_bin_add (GST_BIN (self), self->download);
res &=
gst_element_link_pads (self->out_convert, "src", self->download, "sink");
pad = gst_element_get_static_pad (self->download, "src");
if (!pad) {
res = FALSE;
} else {
GST_DEBUG_OBJECT (self, "setting target src pad %" GST_PTR_FORMAT, pad);
self->srcpad = gst_ghost_pad_new ("src", pad);
gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
gst_object_unref (pad);
}
if (!res)
GST_ERROR_OBJECT (self, "failed to create output chain");
}
static void
gst_gl_mixer_bin_dispose (GObject * object)
{
GstGLMixerBin *self = GST_GL_MIXER_BIN (object);
GList *l = self->priv->input_chains;
while (l) {
struct input_chain *chain = l->data;
if (self->mixer && chain->mixer_pad) {
gst_element_release_request_pad (GST_ELEMENT (self->mixer),
chain->mixer_pad);
gst_object_unref (chain->mixer_pad);
chain->mixer_pad = NULL;
}
l = l->next;
}
g_list_free_full (self->priv->input_chains, (GDestroyNotify) g_free);
G_OBJECT_CLASS (gst_gl_mixer_bin_parent_class)->dispose (object);
}
static gboolean
_create_input_chain (GstGLMixerBin * self, struct input_chain *chain,
GstPad * mixer_pad)
{
GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
GstPad *pad;
gboolean res = TRUE;
gchar *name;
chain->self = self;
chain->mixer_pad = mixer_pad;
chain->upload = gst_element_factory_make ("glupload", NULL);
chain->in_convert = gst_element_factory_make ("glcolorconvert", NULL);
res &= gst_bin_add (GST_BIN (self), chain->in_convert);
res &= gst_bin_add (GST_BIN (self), chain->upload);
pad = gst_element_get_static_pad (chain->in_convert, "src");
if (gst_pad_link (pad, mixer_pad) != GST_PAD_LINK_OK) {
gst_object_unref (pad);
return FALSE;
}
gst_object_unref (pad);
res &=
gst_element_link_pads (chain->upload, "src", chain->in_convert, "sink");
pad = gst_element_get_static_pad (chain->upload, "sink");
if (!pad) {
return FALSE;
} else {
GST_DEBUG_OBJECT (self, "setting target sink pad %" GST_PTR_FORMAT, pad);
name = gst_object_get_name (GST_OBJECT (mixer_pad));
if (klass->create_input_pad) {
chain->ghost_pad = klass->create_input_pad (self, chain->mixer_pad);
gst_object_set_name (GST_OBJECT (chain->ghost_pad), name);
gst_ghost_pad_set_target (chain->ghost_pad, pad);
} else {
chain->ghost_pad =
GST_GHOST_PAD (gst_ghost_pad_new (GST_PAD_NAME (chain->mixer_pad),
pad));
}
g_free (name);
GST_OBJECT_LOCK (self);
if (self->priv->running)
gst_pad_set_active (GST_PAD (chain->ghost_pad), TRUE);
GST_OBJECT_UNLOCK (self);
gst_element_add_pad (GST_ELEMENT_CAST (self), GST_PAD (chain->ghost_pad));
gst_object_unref (pad);
}
gst_element_sync_state_with_parent (chain->upload);
gst_element_sync_state_with_parent (chain->in_convert);
return TRUE;
}
static GstPadTemplate *
_find_element_pad_template (GstElement * element,
GstPadDirection direction, GstPadPresence presence)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
GList *templ_list = gst_element_class_get_pad_template_list (klass);
GstPadTemplate *templ;
/* find suitable template */
while (templ_list) {
templ = (GstPadTemplate *) templ_list->data;
if (GST_PAD_TEMPLATE_DIRECTION (templ) != direction
|| GST_PAD_TEMPLATE_PRESENCE (templ) != presence) {
templ_list = templ_list->next;
templ = NULL;
continue;
}
break;
}
return templ;
}
static gboolean
_connect_mixer_element (GstGLMixerBin * self)
{
gboolean res = TRUE;
g_return_val_if_fail (self->priv->input_chains == NULL, FALSE);
gst_object_set_name (GST_OBJECT (self->mixer), "mixer");
res &= gst_bin_add (GST_BIN (self), self->mixer);
res &= gst_element_link_pads (self->mixer, "src", self->out_convert, "sink");
if (!res)
GST_ERROR_OBJECT (self, "Failed to link mixer element into the pipeline");
gst_element_sync_state_with_parent (self->mixer);
return res;
}
void
gst_gl_mixer_bin_finish_init_with_element (GstGLMixerBin * self,
GstElement * element)
{
g_return_if_fail (GST_IS_ELEMENT (element));
self->mixer = element;
if (!_connect_mixer_element (self)) {
gst_object_unref (self->mixer);
self->mixer = NULL;
}
}
void
gst_gl_mixer_bin_finish_init (GstGLMixerBin * self)
{
GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
GstElement *element = NULL;
if (klass->create_element)
element = klass->create_element ();
if (element)
gst_gl_mixer_bin_finish_init_with_element (self, element);
}
static void
gst_gl_mixer_bin_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstGLMixerBin *self = GST_GL_MIXER_BIN (object);
switch (prop_id) {
case PROP_MIXER:
g_value_set_object (value, self->mixer);
break;
default:
if (self->mixer)
g_object_get_property (G_OBJECT (self->mixer), pspec->name, value);
break;
}
}
static void
gst_gl_mixer_bin_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstGLMixerBin *self = GST_GL_MIXER_BIN (object);
switch (prop_id) {
case PROP_MIXER:
{
GstElement *mixer = g_value_get_object (value);
/* FIXME: deal with replacing a mixer */
g_return_if_fail (!self->mixer || (self->mixer == mixer));
self->mixer = mixer;
if (mixer)
_connect_mixer_element (self);
break;
}
default:
if (self->mixer)
g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
break;
}
}
static GstPad *
gst_gl_mixer_bin_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * req_name, const GstCaps * caps)
{
GstGLMixerBin *self = GST_GL_MIXER_BIN (element);
GstPadTemplate *mixer_templ;
struct input_chain *chain;
GstPad *mixer_pad;
chain = g_new0 (struct input_chain, 1);
mixer_templ = _find_element_pad_template (self->mixer,
GST_PAD_TEMPLATE_DIRECTION (templ), GST_PAD_TEMPLATE_PRESENCE (templ));
g_return_val_if_fail (mixer_templ, NULL);
mixer_pad =
gst_element_request_pad (self->mixer, mixer_templ, req_name, NULL);
gst_object_unref (mixer_templ);
g_return_val_if_fail (mixer_pad, NULL);
if (!_create_input_chain (self, chain, mixer_pad)) {
gst_element_release_request_pad (self->mixer, mixer_pad);
_free_input_chain (chain);
return NULL;
}
GST_OBJECT_LOCK (element);
self->priv->input_chains = g_list_prepend (self->priv->input_chains, chain);
GST_OBJECT_UNLOCK (element);
gst_child_proxy_child_added (GST_CHILD_PROXY (self),
G_OBJECT (chain->ghost_pad), GST_OBJECT_NAME (chain->ghost_pad));
return GST_PAD (chain->ghost_pad);
}
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;
}
/*
* 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 *