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gstreamer/gst-libs/gst/gl/gstglmixer.c

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/* Generic video mixer plugin
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstcollectpads.h>
#include <gst/controller/gstcontroller.h>
#include <gst/video/video.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "gstglmixer.h"
#define GST_CAT_DEFAULT gst_gl_mixer_debug
GST_DEBUG_CATEGORY (gst_gl_mixer_debug);
#define GST_GL_MIXER_GET_STATE_LOCK(mix) \
(GST_GL_MIXER(mix)->state_lock)
#define GST_GL_MIXER_STATE_LOCK(mix) \
(g_mutex_lock(GST_GL_MIXER_GET_STATE_LOCK (mix)))
#define GST_GL_MIXER_STATE_UNLOCK(mix) \
(g_mutex_unlock(GST_GL_MIXER_GET_STATE_LOCK (mix)))
static void gst_gl_mixer_pad_class_init (GstGLMixerPadClass * klass);
static void gst_gl_mixer_pad_init (GstGLMixerPad * mixerpad);
static void gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_gl_mixer_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static gboolean gst_gl_mixer_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_gl_mixer_sink_event (GstPad * pad, GstEvent * event);
enum
{
PROP_PAD_0
};
G_DEFINE_TYPE (GstGLMixerPad, gst_gl_mixer_pad, GST_TYPE_PAD);
static void
gst_gl_mixer_pad_class_init (GstGLMixerPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_gl_mixer_pad_set_property;
gobject_class->get_property = gst_gl_mixer_pad_get_property;
}
static void
gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
//GstGLMixerPad *pad = GST_GL_MIXER_PAD (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_mixer_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
//GstGLMixerPad *pad = GST_GL_MIXER_PAD (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_mixer_set_master_geometry (GstGLMixer * mix)
{
GSList *walk = mix->sinkpads;
gint fps_n = 0;
gint fps_d = 0;
GstGLMixerPad *master = NULL;
while (walk) {
GstGLMixerPad *mixpad = GST_GL_MIXER_PAD (walk->data);
walk = g_slist_next (walk);
/* If mix framerate < mixpad framerate, using fractions */
GST_DEBUG_OBJECT (mix, "comparing framerate %d/%d to mixpad's %d/%d",
fps_n, fps_d, mixpad->fps_n, mixpad->fps_d);
if ((!fps_n && !fps_d) ||
((gint64) fps_n * mixpad->fps_d < (gint64) mixpad->fps_n * fps_d)) {
fps_n = mixpad->fps_n;
fps_d = mixpad->fps_d;
GST_DEBUG_OBJECT (mix, "becomes the master pad");
master = mixpad;
}
}
/* set results */
if (mix->master != master || mix->fps_n != fps_n || mix->fps_d != fps_d) {
mix->setcaps = TRUE;
mix->sendseg = TRUE;
mix->master = master;
mix->fps_n = fps_n;
mix->fps_d = fps_d;
}
}
static gboolean
gst_gl_mixer_pad_sink_setcaps (GstPad * pad, GstCaps * vscaps)
{
GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent (pad));
GstGLMixerPad *mixpad = GST_GL_MIXER_PAD (pad);
GstStructure *structure = gst_caps_get_structure (vscaps, 0);
gint width = 0;
gint height = 0;
gboolean ret = FALSE;
const GValue *framerate = gst_structure_get_value (structure, "framerate");
GST_INFO_OBJECT (mix, "Setting caps %" GST_PTR_FORMAT, vscaps);
if (!gst_structure_get_int (structure, "width", &width) ||
!gst_structure_get_int (structure, "height", &height) || !framerate)
goto beach;
GST_GL_MIXER_STATE_LOCK (mix);
mixpad->fps_n = gst_value_get_fraction_numerator (framerate);
mixpad->fps_d = gst_value_get_fraction_denominator (framerate);
mixpad->width = width;
mixpad->height = height;
gst_gl_mixer_set_master_geometry (mix);
GST_GL_MIXER_STATE_UNLOCK (mix);
ret = TRUE;
beach:
gst_object_unref (mix);
return ret;
}
static void
gst_gl_mixer_pad_init (GstGLMixerPad * mixerpad)
{
gst_pad_set_setcaps_function (GST_PAD (mixerpad),
gst_gl_mixer_pad_sink_setcaps);
mixerpad->display = NULL;
}
/* GLMixer signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_GL_VIDEO_CAPS)
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS (GST_GL_VIDEO_CAPS)
);
static void gst_gl_mixer_finalize (GObject * object);
static GstCaps *gst_gl_mixer_getcaps (GstPad * pad);
static gboolean gst_gl_mixer_setcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_gl_mixer_query (GstPad * pad, GstQuery * query);
static GstFlowReturn gst_gl_mixer_collected (GstCollectPads * pads,
GstGLMixer * mix);
static GstPad *gst_gl_mixer_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
static void gst_gl_mixer_release_pad (GstElement * element, GstPad * pad);
static void gst_gl_mixer_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_mixer_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_gl_mixer_change_state (GstElement * element,
GstStateChange transition);
static void gst_gl_mixer_child_proxy_init (gpointer g_iface,
gpointer iface_data);
static void _do_init (GType object_type);
GST_BOILERPLATE_FULL (GstGLMixer, gst_gl_mixer, GstElement,
GST_TYPE_ELEMENT, _do_init);
static void
_do_init (GType object_type)
{
static const GInterfaceInfo child_proxy_info = {
(GInterfaceInitFunc) gst_gl_mixer_child_proxy_init,
NULL,
NULL
};
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixer", 0, "opengl mixer");
g_type_add_interface_static (object_type, GST_TYPE_CHILD_PROXY,
&child_proxy_info);
GST_INFO ("GstChildProxy interface registered");
}
static GstObject *
gst_gl_mixer_child_proxy_get_child_by_index (GstChildProxy * child_proxy,
guint index)
{
GstGLMixer *mix = GST_GL_MIXER (child_proxy);
GstObject *obj;
GST_GL_MIXER_STATE_LOCK (mix);
if ((obj = g_slist_nth_data (mix->sinkpads, index)))
gst_object_ref (obj);
GST_GL_MIXER_STATE_UNLOCK (mix);
return obj;
}
static guint
gst_gl_mixer_child_proxy_get_children_count (GstChildProxy * child_proxy)
{
guint count = 0;
GstGLMixer *mix = GST_GL_MIXER (child_proxy);
GST_GL_MIXER_STATE_LOCK (mix);
count = mix->numpads;
GST_GL_MIXER_STATE_UNLOCK (mix);
GST_INFO_OBJECT (mix, "Children Count: %d", count);
return count;
}
static void
gst_gl_mixer_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_gl_mixer_child_proxy_get_child_by_index;
iface->get_children_count = gst_gl_mixer_child_proxy_get_children_count;
}
static void
gst_gl_mixer_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));
}
static void
gst_gl_mixer_class_init (GstGLMixerClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_gl_mixer_finalize);
gobject_class->get_property = gst_gl_mixer_get_property;
gobject_class->set_property = gst_gl_mixer_set_property;
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_gl_mixer_request_new_pad);
gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_gl_mixer_release_pad);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_gl_mixer_change_state);
/* Register the pad class */
(void) (GST_TYPE_GL_MIXER_PAD);
klass->set_caps = NULL;
}
static void
gst_gl_mixer_collect_free (GstGLMixerCollect * mixcol)
{
if (mixcol->buffer) {
gst_buffer_unref (mixcol->buffer);
mixcol->buffer = NULL;
}
}
static void
gst_gl_mixer_reset (GstGLMixer * mix)
{
GSList *walk;
mix->width = 0;
mix->height = 0;
mix->fps_n = 0;
mix->fps_d = 0;
mix->setcaps = FALSE;
mix->sendseg = FALSE;
mix->segment_position = 0;
mix->segment_rate = 1.0;
mix->last_ts = 0;
/* clean up collect data */
walk = mix->collect->data;
while (walk) {
GstGLMixerCollect *data = (GstGLMixerCollect *) walk->data;
gst_gl_mixer_collect_free (data);
walk = g_slist_next (walk);
}
mix->next_sinkpad = 0;
}
static void
gst_gl_mixer_init (GstGLMixer * mix, GstGLMixerClass * 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_gl_mixer_getcaps));
gst_pad_set_setcaps_function (GST_PAD (mix->srcpad),
GST_DEBUG_FUNCPTR (gst_gl_mixer_setcaps));
gst_pad_set_query_function (GST_PAD (mix->srcpad),
GST_DEBUG_FUNCPTR (gst_gl_mixer_query));
gst_pad_set_event_function (GST_PAD (mix->srcpad),
GST_DEBUG_FUNCPTR (gst_gl_mixer_src_event));
gst_element_add_pad (GST_ELEMENT (mix), mix->srcpad);
mix->collect = gst_collect_pads_new ();
gst_collect_pads_set_function (mix->collect,
(GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_gl_mixer_collected), mix);
mix->state_lock = g_mutex_new ();
mix->array_buffers = 0;
mix->display = NULL;
mix->fbo = 0;
mix->depthbuffer = 0;
/* initialize variables */
gst_gl_mixer_reset (mix);
}
static void
gst_gl_mixer_finalize (GObject * object)
{
GstGLMixer *mix = GST_GL_MIXER (object);
gst_object_unref (mix->collect);
g_mutex_free (mix->state_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_gl_mixer_query_duration (GstGLMixer * 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_gl_mixer_query_latency (GstGLMixer * 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_gl_mixer_query (GstPad * pad, GstQuery * query)
{
GstGLMixer *mix = GST_GL_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_gl_mixer_query_duration (mix, query);
break;
case GST_QUERY_LATENCY:
res = gst_gl_mixer_query_latency (mix, query);
break;
case GST_QUERY_CUSTOM:
{
/* mix is a sink in terms of gl chain, so we are sharing the gldisplay that
* comes from src pad with every display of the sink pads */
GSList *walk = mix->sinkpads;
GstStructure *structure = gst_query_get_structure (query);
res =
g_strcmp0 (gst_element_get_name (mix),
gst_structure_get_name (structure)) == 0;
if (!res) {
GstGLDisplay *foreign_display = NULL;
gulong foreign_gl_context = 0;
if (mix->display) {
/* this gl filter is a sink in terms of the gl chain */
foreign_display = mix->display;
} else {
/* at least one gl element is after in our gl chain */
/* id_value is set by upstream element of itself when going
* to paused state */
const GValue *id_value =
gst_structure_get_value (structure, "gstgldisplay");
foreign_display = GST_GL_DISPLAY (g_value_get_pointer (id_value));
}
foreign_gl_context =
gst_gl_display_get_internal_gl_context (foreign_display);
/* iterate on each sink pad until reaching the gl element
* that requested the query */
while (!res && walk) {
GstGLMixerPad *sink_pad = GST_GL_MIXER_PAD (walk->data);
GstPad *peer = gst_pad_get_peer (GST_PAD_CAST (sink_pad));
walk = g_slist_next (walk);
g_assert (sink_pad->display != NULL);
gst_gl_display_activate_gl_context (foreign_display, FALSE);
res =
gst_gl_display_create_context (sink_pad->display,
foreign_gl_context);
gst_gl_display_activate_gl_context (foreign_display, TRUE);
if (res)
gst_structure_set (structure, "gstgldisplay", G_TYPE_POINTER,
sink_pad->display, NULL);
else
GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND,
(GST_GL_DISPLAY_ERR_MSG (sink_pad->display)), (NULL));
/* does not work:
* res = gst_pad_query_default (GST_PAD_CAST (sink_pad), query);*/
res = gst_pad_query (peer, query);
gst_object_unref (peer);
}
}
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_gl_mixer_getcaps (GstPad * pad)
{
GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent (pad));
GstCaps *caps = gst_caps_copy (gst_pad_get_pad_template_caps (mix->srcpad));
GstStructure *structure = gst_caps_get_structure (caps, 0);
gst_structure_set (structure, "width", G_TYPE_INT, 8000, NULL);
gst_structure_set (structure, "height", G_TYPE_INT, /*G_MAXINT */ 6000, 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_gl_mixer_setcaps (GstPad * pad, GstCaps * caps)
{
GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent_element (pad));
GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
GstStructure *structure = gst_caps_get_structure (caps, 0);
gint width = 0;
gint height = 0;
GST_INFO_OBJECT (mix, "set src caps: %" GST_PTR_FORMAT, caps);
if (!gst_structure_get_int (structure, "width", &width) ||
!gst_structure_get_int (structure, "height", &height)) {
gst_object_unref (mix);
return FALSE;
}
GST_GL_MIXER_STATE_LOCK (mix);
mix->width = width;
mix->height = height;
GST_GL_MIXER_STATE_UNLOCK (mix);
if (!gst_gl_display_gen_fbo (mix->display, mix->width, mix->height,
&mix->fbo, &mix->depthbuffer)) {
GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND,
(GST_GL_DISPLAY_ERR_MSG (mix->display)), (NULL));
gst_object_unref (mix);
return FALSE;
}
if (mixer_class->set_caps)
mixer_class->set_caps (mix, caps);
gst_object_unref (mix);
return TRUE;
}
static GstPad *
gst_gl_mixer_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name)
{
GstGLMixer *mix = GST_GL_MIXER (element);
GstGLMixerPad *mixpad = NULL;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) {
gint serial = 0;
gchar *name = NULL;
GstGLMixerCollect *mixcol = NULL;
if (req_name == NULL || strlen (req_name) < 6) {
/* 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_GL_MIXER_PAD, "name", name, "direction",
templ->direction, "template", templ, NULL);
g_free (name);
GST_GL_MIXER_STATE_LOCK (mix);
mixcol = (GstGLMixerCollect *)
gst_collect_pads_add_pad (mix->collect, GST_PAD (mixpad),
sizeof (GstGLMixerCollect));
/* 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_gl_mixer_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_GL_MIXER_STATE_UNLOCK (mix);
} else {
g_warning ("glmixer: 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_gl_mixer_release_pad (GstElement * element, GstPad * pad)
{
GstGLMixer *mix = GST_GL_MIXER (element);
GstGLMixerPad *mixpad = NULL;
GST_GL_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_GL_MIXER_PAD (pad);
mix->sinkpads = g_slist_remove (mix->sinkpads, pad);
gst_gl_mixer_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_gl_mixer_set_master_geometry (mix);
mix->numpads--;
GST_GL_MIXER_STATE_UNLOCK (mix);
gst_element_remove_pad (element, pad);
return;
error:
GST_GL_MIXER_STATE_UNLOCK (mix);
}
/* try to get a buffer on all pads. As long as the queued value is
* negative, we skip buffers */
static gboolean
gst_gl_mixer_fill_queues (GstGLMixer * mix)
{
GSList *walk = NULL;
gboolean eos = TRUE;
g_return_val_if_fail (GST_IS_GL_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;
GstGLMixerCollect *mixcol = (GstGLMixerCollect *) data;
GstGLMixerPad *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;
GST_LOG_OBJECT (mix, "we have a buffer !");
mixcol->buffer = buf;
duration = GST_BUFFER_DURATION (mixcol->buffer);
/* 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;
} 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;
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;
}
static void
gst_gl_mixer_process_buffers (GstGLMixer * mix, GstBuffer * outbuf)
{
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
GSList *walk = mix->sinkpads;
gint array_index = 0;
while (walk) { /* We walk with this list because it's ordered */
GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
GstGLMixerCollect *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);
/* put buffer into array */
mix->array_buffers->pdata[array_index] = mixcol->buffer;
if (pad == mix->master) {
gint64 running_time;
running_time =
gst_segment_to_running_time (seg, GST_FORMAT_TIME, timestamp);
/* outgoing buffers need the running_time */
GST_BUFFER_TIMESTAMP (outbuf) = running_time;
GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (mixcol->buffer);
mix->last_ts = running_time;
if (GST_BUFFER_DURATION_IS_VALID (outbuf))
mix->last_ts += GST_BUFFER_DURATION (outbuf);
}
}
++array_index;
}
mix_class->process_buffers (mix, mix->array_buffers, outbuf);
}
/* 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_gl_mixer_update_queues (GstGLMixer * mix)
{
GSList *walk;
gint64 interval;
interval = mix->master->queued;
if (interval <= 0) {
if (mix->fps_n == 0) {
interval = G_MAXINT64;
} else {
interval = 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) {
GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
GstGLMixerCollect *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_gl_mixer_collected (GstCollectPads * pads, GstGLMixer * mix)
{
GstFlowReturn ret = GST_FLOW_OK;
GstBuffer *outbuf = NULL;
GstGLBuffer *gl_outbuf = NULL;
gboolean eos = FALSE;
gint width = 0;
gint height = 0;
g_return_val_if_fail (GST_IS_GL_MIXER (mix), GST_FLOW_ERROR);
if (mix->width == 0) {
GstCaps *newcaps = gst_caps_make_writable
(gst_pad_get_negotiated_caps (GST_PAD (mix->master)));
gst_pad_set_caps (mix->srcpad, newcaps);
}
GST_LOG_OBJECT (mix, "all pads are collected");
GST_GL_MIXER_STATE_LOCK (mix);
eos = gst_gl_mixer_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;
}
/* Calculating out buffer size from input size */
ret = gst_gl_buffer_parse_caps (GST_PAD_CAPS (mix->srcpad), &width, &height);
if (!ret)
goto error;
gl_outbuf = gst_gl_buffer_new (mix->display, mix->width, mix->height);
outbuf = GST_BUFFER (gl_outbuf);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (mix->srcpad));
gst_gl_mixer_process_buffers (mix, outbuf);
gst_gl_mixer_update_queues (mix);
GST_GL_MIXER_STATE_UNLOCK (mix);
ret = gst_pad_push (mix->srcpad, outbuf);
beach:
return ret;
/* ERRORS */
error:
{
if (outbuf)
gst_buffer_unref (outbuf);
GST_GL_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 (GstGLMixer * 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_gl_mixer_src_event (GstPad * pad, GstEvent * event)
{
GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent (pad));
gboolean result;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:
/* QoS might be tricky */
result = FALSE;
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;
GST_OBJECT_UNLOCK (mix->collect);
result = forward_event (mix, event);
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_gl_mixer_sink_event (GstPad * pad, GstEvent * event)
{
GstGLMixerPad *vpad = GST_GL_MIXER_PAD (pad);
GstGLMixer *videomixer = GST_GL_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;
/* 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;
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_gl_mixer_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
//GstGLMixer *mix = GST_GL_MIXER (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_mixer_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
//GstGLMixer *mix = GST_GL_MIXER (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_gl_mixer_change_state (GstElement * element, GstStateChange transition)
{
GstGLMixer *mix;
GstStateChangeReturn ret;
GstGLMixerClass *mixer_class;
g_return_val_if_fail (GST_IS_GL_MIXER (element), GST_STATE_CHANGE_FAILURE);
mix = GST_GL_MIXER (element);
mixer_class = GST_GL_MIXER_GET_CLASS (mix);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
{
GSList *walk = mix->sinkpads;
gint i = 0;
GstElement *parent = GST_ELEMENT (gst_element_get_parent (mix));
GstStructure *structure = NULL;
GstQuery *query = NULL;
gboolean isPerformed = FALSE;
if (!parent) {
GST_ELEMENT_ERROR (mix, CORE, STATE_CHANGE, (NULL),
("A parent bin is required"));
return FALSE;
}
structure = gst_structure_new (gst_element_get_name (mix), NULL);
query = gst_query_new_application (GST_QUERY_CUSTOM, structure);
/* retrieve the gldisplay that is owned by gl elements after the gl mixer */
isPerformed = gst_element_query (parent, query);
if (isPerformed) {
const GValue *id_value =
gst_structure_get_value (structure, "gstgldisplay");
if (G_VALUE_HOLDS_POINTER (id_value))
/* at least one gl element is after in our gl chain */
mix->display =
g_object_ref (GST_GL_DISPLAY (g_value_get_pointer (id_value)));
else {
/* this gl filter is a sink in terms of the gl chain */
mix->display = gst_gl_display_new ();
gst_gl_display_create_context (mix->display, 0);
}
}
gst_query_unref (query);
gst_object_unref (GST_OBJECT (parent));
/* instanciate a gldisplay for each sink pad */
while (walk) {
GstGLMixerPad *sink_pad = GST_GL_MIXER_PAD (walk->data);
walk = g_slist_next (walk);
sink_pad->display = gst_gl_display_new ();
}
mix->array_buffers = g_ptr_array_sized_new (mix->next_sinkpad);
for (i = 0; i < mix->next_sinkpad; ++i) {
g_ptr_array_add (mix->array_buffers, NULL);
}
GST_LOG_OBJECT (mix, "starting collectpads");
gst_collect_pads_start (mix->collect);
break;
}
case GST_STATE_CHANGE_PAUSED_TO_READY:
{
GSList *walk = mix->sinkpads;
GST_LOG_OBJECT (mix, "stopping collectpads");
gst_collect_pads_stop (mix->collect);
g_ptr_array_free (mix->array_buffers, TRUE);
while (walk) {
GstGLMixerPad *sink_pad = GST_GL_MIXER_PAD (walk->data);
walk = g_slist_next (walk);
if (sink_pad->display)
gst_gl_display_activate_gl_context (sink_pad->display, FALSE);
}
if (mixer_class->reset)
mixer_class->reset (mix);
if (mix->fbo) {
gst_gl_display_del_fbo (mix->display, mix->fbo, mix->depthbuffer);
mix->fbo = 0;
mix->depthbuffer = 0;
}
if (mix->display) {
g_object_unref (mix->display);
mix->display = NULL;
}
while (walk) {
GstGLMixerPad *sink_pad = GST_GL_MIXER_PAD (walk->data);
walk = g_slist_next (walk);
if (sink_pad->display) {
gst_gl_display_activate_gl_context (sink_pad->display, TRUE);
g_object_unref (sink_pad->display);
sink_pad->display = NULL;
}
}
break;
}
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_gl_mixer_reset (mix);
break;
default:
break;
}
return ret;
}
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