gstreamer/ges/ges-smart-adder.c

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/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4 -*- */
/*
* gst-editing-services
*
* Copyright (C) 2013 Thibault Saunier <tsaunier@gnome.org>
* gst-editing-services is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* gst-editing-services 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.";
*/
#include <gst/audio/audio.h>
#include "ges-types.h"
#include "ges-internal.h"
#include "ges-smart-adder.h"
G_DEFINE_TYPE (GESSmartAdder, ges_smart_adder, GST_TYPE_BIN);
#define GET_LOCK(obj) (&((GESSmartAdder*)(obj))->lock)
#define LOCK(obj) (g_mutex_lock (GET_LOCK(obj)))
#define UNLOCK(obj) (g_mutex_unlock (GET_LOCK(obj)))
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw")
);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("audio/x-raw")
);
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define DEFAULT_CAPS "audio/x-raw,format=(string)S32LE;"
#else
#define DEFAULT_CAPS "audio/x-raw,format=(string)S32BE;"
#endif
typedef struct _PadInfos
{
GESSmartAdder *self;
GstPad *adder_pad;
GstElement *bin;
} PadInfos;
static void
destroy_pad (PadInfos * infos)
{
if (G_LIKELY (infos->bin)) {
gst_element_set_state (infos->bin, GST_STATE_NULL);
gst_element_unlink (infos->bin, infos->self->adder);
gst_bin_remove (GST_BIN (infos->self), infos->bin);
}
if (infos->adder_pad) {
gst_element_release_request_pad (infos->self->adder, infos->adder_pad);
gst_object_unref (infos->adder_pad);
}
g_slice_free (PadInfos, infos);
}
/****************************************************
* GstElement vmetods *
****************************************************/
static GstPad *
_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * name, const GstCaps * caps)
{
GstPad *audioresample_srcpad, *audioconvert_sinkpad, *tmpghost;
GstPad *ghost;
GstElement *audioconvert, *audioresample;
PadInfos *infos = g_slice_new0 (PadInfos);
GESSmartAdder *self = GES_SMART_ADDER (element);
infos->adder_pad = gst_element_request_pad (self->adder,
gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (self->adder),
"sink_%u"), NULL, caps);
if (infos->adder_pad == NULL) {
GST_WARNING_OBJECT (element, "Could not get any pad from GstAdder");
g_slice_free (PadInfos, infos);
return NULL;
}
infos->self = self;
infos->bin = gst_bin_new (NULL);
audioconvert = gst_element_factory_make ("audioconvert", NULL);
audioresample = gst_element_factory_make ("audioresample", NULL);
gst_bin_add_many (GST_BIN (infos->bin), audioconvert, audioresample, NULL);
gst_element_link_many (audioconvert, audioresample, NULL);
audioconvert_sinkpad = gst_element_get_static_pad (audioconvert, "sink");
tmpghost = GST_PAD (gst_ghost_pad_new (NULL, audioconvert_sinkpad));
gst_object_unref (audioconvert_sinkpad);
gst_pad_set_active (tmpghost, TRUE);
gst_element_add_pad (GST_ELEMENT (infos->bin), tmpghost);
gst_bin_add (GST_BIN (self), infos->bin);
ghost = gst_ghost_pad_new (NULL, tmpghost);
gst_pad_set_active (ghost, TRUE);
if (!gst_element_add_pad (GST_ELEMENT (self), ghost))
goto could_not_add;
audioresample_srcpad = gst_element_get_static_pad (audioresample, "src");
tmpghost = GST_PAD (gst_ghost_pad_new (NULL, audioresample_srcpad));
gst_object_unref (audioresample_srcpad);
gst_pad_set_active (tmpghost, TRUE);
gst_element_add_pad (GST_ELEMENT (infos->bin), tmpghost);
gst_pad_link (tmpghost, infos->adder_pad);
LOCK (self);
g_hash_table_insert (self->pads_infos, ghost, infos);
UNLOCK (self);
GST_DEBUG_OBJECT (self, "Returning new pad %" GST_PTR_FORMAT, ghost);
return ghost;
could_not_add:
{
GST_ERROR_OBJECT (self, "could not add pad");
destroy_pad (infos);
return NULL;
}
}
static void
_release_pad (GstElement * element, GstPad * pad)
{
GST_DEBUG_OBJECT (element, "Releasing pad %" GST_PTR_FORMAT, pad);
LOCK (element);
g_hash_table_remove (GES_SMART_ADDER (element)->pads_infos, pad);
UNLOCK (element);
}
/****************************************************
* GObject vmethods *
****************************************************/
static void
ges_smart_adder_dispose (GObject * object)
{
GESSmartAdder *self = GES_SMART_ADDER (object);
if (self->pads_infos) {
g_hash_table_unref (self->pads_infos);
self->pads_infos = NULL;
}
G_OBJECT_CLASS (ges_smart_adder_parent_class)->dispose (object);
}
static void
ges_smart_adder_finalize (GObject * object)
{
GESSmartAdder *self = GES_SMART_ADDER (object);
g_mutex_clear (&self->lock);
G_OBJECT_CLASS (ges_smart_adder_parent_class)->finalize (object);
}
static void
ges_smart_adder_class_init (GESSmartAdderClass * klass)
{
/* GstBinClass *parent_class = GST_BIN_CLASS (klass);
*/
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
/* FIXME Make sure the AdderClass doesn get destroy before ourself */
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_static_metadata (element_class, "GES Smart adder",
"Generic/Audio",
"Use adder making use of GES informations",
"Thibault Saunier <thibault.saunier@collabora.com>");
element_class->request_new_pad = GST_DEBUG_FUNCPTR (_request_new_pad);
element_class->release_pad = GST_DEBUG_FUNCPTR (_release_pad);
object_class->dispose = ges_smart_adder_dispose;
object_class->finalize = ges_smart_adder_finalize;
}
static void
ges_smart_adder_init (GESSmartAdder * self)
{
GstPad *pad;
g_mutex_init (&self->lock);
self->adder = gst_element_factory_make ("audiomixer", "smart-adder-adder");
gst_bin_add (GST_BIN (self), self->adder);
pad = gst_element_get_static_pad (self->adder, "src");
self->srcpad = gst_ghost_pad_new ("src", pad);
gst_pad_set_active (self->srcpad, TRUE);
gst_object_unref (pad);
gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
self->pads_infos = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, (GDestroyNotify) destroy_pad);
}
static void
restriction_caps_cb (GESTrack * track,
GParamSpec * arg G_GNUC_UNUSED, GESSmartAdder * self)
{
GstCaps *caps;
g_object_get (track, "restriction-caps", &caps, NULL);
if (!caps)
caps = gst_caps_from_string (DEFAULT_CAPS);
GST_DEBUG_OBJECT (self, "Setting adder caps to %" GST_PTR_FORMAT, caps);
g_object_set (self->adder, "caps", caps, NULL);
gst_caps_unref (caps);
}
GstElement *
ges_smart_adder_new (GESTrack * track)
{
GESSmartAdder *self;
self = g_object_new (GES_TYPE_SMART_ADDER, NULL);
self->track = track;
if (track) {
restriction_caps_cb (track, NULL, self);
g_signal_connect (track, "notify::restriction-caps",
G_CALLBACK (restriction_caps_cb), self);
}
/* FIXME Make adder smart and let it properly negotiate caps! */
return GST_ELEMENT (self);
}