gstreamer/ges/ges-smart-adder.c
Tim-Philipp Müller a7347ca8f7 WIP: ges: fix API export/import and 'inconsistent linkage' on MSVC
Export GES library API in headers when we're building the
library itself, otherwise import the API from the headers.

This fixes linker warnings on Windows when building with MSVC.

Fix up some missing config.h includes when building the lib which
is needed to get the export api define from config.h

Fixes https://gitlab.freedesktop.org/gstreamer/gst-editing-services/issues/42
2018-12-15 00:14:51 +00:00

265 lines
7.8 KiB
C

/* -*- 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/>.";
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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_static_pad_template (element_class, &src_template);
gst_element_class_add_static_pad_template (element_class, &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);
self->capsfilter =
gst_element_factory_make ("capsfilter", "smart-adder-capsfilter");
gst_bin_add (GST_BIN (self), self->capsfilter);
gst_element_link (self->adder, self->capsfilter);
pad = gst_element_get_static_pad (self->capsfilter, "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->capsfilter, "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);
}