gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/transcoder/gsttranscoder-signal-adapter.c

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/* GStreamer
*
* Copyright (C) 2019-2020 Stephan Hesse <stephan@emliri.com>
* Copyright (C) 2020 Thibault Saunier <tsaunier@igalia.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 "gsttranscoder.h"
#include "gsttranscoder-signal-adapter.h"
#include "gsttranscoder-private.h"
#include <gst/gst.h>
GST_DEBUG_CATEGORY_STATIC (gst_transcoder_signal_adapter_debug);
#define GST_CAT_DEFAULT gst_transcoder_signal_adapter_debug
enum
{
SIGNAL_POSITION_UPDATED,
SIGNAL_DURATION_CHANGED,
SIGNAL_STATE_CHANGED,
SIGNAL_DONE,
SIGNAL_ERROR,
SIGNAL_WARNING,
SIGNAL_LAST
};
enum
{
PROP_0,
PROP_TRANSCODER,
PROP_LAST
};
static GParamSpec *param_specs[PROP_LAST] = { NULL, };
struct _GstTranscoderSignalAdapterClass
{
GObjectClass parent_class;
};
#define _do_init \
GST_DEBUG_CATEGORY_INIT (gst_transcoder_signal_adapter_debug, "gst-transcoder-signaladapter", \
0, "GstTranscoder signal adapter")
#define parent_class gst_transcoder_signal_adapter_parent_class
G_DEFINE_TYPE_WITH_CODE (GstTranscoderSignalAdapter,
gst_transcoder_signal_adapter, G_TYPE_OBJECT, _do_init);
static guint signals[SIGNAL_LAST] = { 0, };
static void
gst_transcoder_signal_adapter_emit (GstTranscoderSignalAdapter * self,
const GstStructure * message_data)
{
GstTranscoderMessage transcoder_message_type;
g_return_if_fail (g_str_equal (gst_structure_get_name (message_data),
GST_TRANSCODER_MESSAGE_DATA));
GST_LOG ("Emitting message %" GST_PTR_FORMAT, message_data);
gst_structure_get (message_data, GST_TRANSCODER_MESSAGE_DATA_TYPE,
GST_TYPE_TRANSCODER_MESSAGE, &transcoder_message_type, NULL);
switch (transcoder_message_type) {
case GST_TRANSCODER_MESSAGE_POSITION_UPDATED:{
GstClockTime pos = GST_CLOCK_TIME_NONE;
gst_structure_get (message_data, GST_TRANSCODER_MESSAGE_DATA_POSITION,
GST_TYPE_CLOCK_TIME, &pos, NULL);
g_signal_emit (self, signals[SIGNAL_POSITION_UPDATED], 0, pos);
break;
}
case GST_TRANSCODER_MESSAGE_DURATION_CHANGED:{
GstClockTime duration = GST_CLOCK_TIME_NONE;
gst_structure_get (message_data, GST_TRANSCODER_MESSAGE_DATA_DURATION,
GST_TYPE_CLOCK_TIME, &duration, NULL);
g_signal_emit (self, signals[SIGNAL_DURATION_CHANGED], 0, duration);
break;
}
case GST_TRANSCODER_MESSAGE_STATE_CHANGED:{
GstTranscoderState state;
gst_structure_get (message_data, GST_TRANSCODER_MESSAGE_DATA_STATE,
GST_TYPE_TRANSCODER_STATE, &state, NULL);
g_signal_emit (self, signals[SIGNAL_STATE_CHANGED], 0, state);
break;
}
case GST_TRANSCODER_MESSAGE_DONE:
g_signal_emit (self, signals[SIGNAL_DONE], 0);
break;
case GST_TRANSCODER_MESSAGE_ERROR:{
GError *error = NULL;
GstStructure *details = NULL;
gst_structure_get (message_data, GST_TRANSCODER_MESSAGE_DATA_ERROR,
G_TYPE_ERROR, &error, GST_TYPE_STRUCTURE, &details, NULL);
g_signal_emit (self, signals[SIGNAL_ERROR], 0, error, details);
g_error_free (error);
if (details)
gst_structure_free (details);
break;
}
case GST_TRANSCODER_MESSAGE_WARNING:{
GstStructure *details = NULL;
GError *error = NULL;
gst_structure_get (message_data, GST_TRANSCODER_MESSAGE_DATA_WARNING,
G_TYPE_ERROR, &error, GST_TYPE_STRUCTURE, &details, NULL);
g_signal_emit (self, signals[SIGNAL_WARNING], 0, error, details);
g_error_free (error);
if (details)
gst_structure_free (details);
break;
}
default:
g_assert_not_reached ();
break;
}
}
/*
* callback for the bus-message in-sync handling
*/
static GstBusSyncReply
gst_transcoder_signal_adapter_bus_sync_handler
(GstBus * bus, GstMessage * message, gpointer user_data)
{
GstTranscoderSignalAdapter *self = GST_TRANSCODER_SIGNAL_ADAPTER (user_data);
const GstStructure *message_data = gst_message_get_structure (message);
gst_transcoder_signal_adapter_emit (self, message_data);
gst_message_unref (message);
return GST_BUS_DROP;
}
/*
* callback for the bus-watch
* pre: there is a message on the bus
*/
static gboolean
gst_transcoder_signal_adapter_on_message (GstBus * bus,
GstMessage * message, gpointer user_data)
{
GstTranscoderSignalAdapter *self = GST_TRANSCODER_SIGNAL_ADAPTER (user_data);
const GstStructure *message_data = gst_message_get_structure (message);
gst_transcoder_signal_adapter_emit (self, message_data);
return TRUE;
}
/**
* gst_transcoder_signal_adapter_new:
* @transcoder: (transfer none): #GstTranscoder instance to emit signals for.
* @context: (nullable): A #GMainContext on which the main-loop will process
* transcoder bus messages on. Can be NULL (thread-default
* context will be used then).
*
* A bus-watching #GSource will be created and attached to the context. The
* attached callback will emit the corresponding signal for the message
* received. Matching signals for transcoder messages from the bus will be
* emitted by it on the created adapter object.
*
* Returns: (transfer full)(nullable): A new #GstTranscoderSignalAdapter to
* connect signal handlers to.
*
* Since: 1.20
*/
GstTranscoderSignalAdapter *
gst_transcoder_signal_adapter_new (GstTranscoder * transcoder,
GMainContext * context)
{
GstTranscoderSignalAdapter *self = NULL;
g_return_val_if_fail (GST_IS_TRANSCODER (transcoder), NULL);
self = g_object_new (GST_TYPE_TRANSCODER_SIGNAL_ADAPTER, NULL);
self->bus = gst_transcoder_get_message_bus (transcoder);
self->source = gst_bus_create_watch (self->bus);
if (!self->source) {
GST_ERROR_OBJECT (transcoder, "Could not create watch.");
gst_object_unref (self);
return NULL;
}
g_weak_ref_set (&self->transcoder, transcoder);
g_source_attach (self->source, context);
g_source_set_callback (self->source,
(GSourceFunc) gst_transcoder_signal_adapter_on_message, self, NULL);
return self;
}
/**
* gst_transcoder_signal_adapter_new_sync_emit:
* @transcoder: (transfer none): #GstTranscoder instance to emit signals
* synchronously for.
*
* Returns: (transfer full): A new #GstTranscoderSignalAdapter to connect signal
* handlers to.
*
* Since: 1.20
*/
GstTranscoderSignalAdapter *
gst_transcoder_signal_adapter_new_sync_emit (GstTranscoder * transcoder)
{
GstBus *bus = NULL;
GstTranscoderSignalAdapter *self = NULL;
g_return_val_if_fail (GST_IS_TRANSCODER (transcoder), NULL);
bus = gst_transcoder_get_message_bus (transcoder);
self = g_object_new (GST_TYPE_TRANSCODER_SIGNAL_ADAPTER, NULL);
self->bus = bus;
gst_bus_set_sync_handler (self->bus,
gst_transcoder_signal_adapter_bus_sync_handler, self, NULL);
return self;
}
static void
gst_transcoder_signal_adapter_init (GstTranscoderSignalAdapter * self)
{
self->source = NULL;
}
static void
gst_transcoder_signal_adapter_dispose (GObject * object)
{
GstTranscoderSignalAdapter *self = GST_TRANSCODER_SIGNAL_ADAPTER (object);
if (self->source) {
g_source_destroy (self->source);
g_source_unref (self->source);
self->source = NULL;
}
gst_clear_object (&self->bus);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_transcoder_signal_adapter_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstTranscoderSignalAdapter *self = GST_TRANSCODER_SIGNAL_ADAPTER (object);
switch (prop_id) {
case PROP_TRANSCODER:
g_value_take_object (value, g_weak_ref_get (&self->transcoder));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_transcoder_signal_adapter_class_init (GstTranscoderSignalAdapterClass *
klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->dispose = gst_transcoder_signal_adapter_dispose;
gobject_class->get_property = gst_transcoder_signal_adapter_get_property;
signals[SIGNAL_POSITION_UPDATED] =
g_signal_new ("position-updated", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS, 0, NULL,
NULL, NULL, G_TYPE_NONE, 1, GST_TYPE_CLOCK_TIME);
signals[SIGNAL_DURATION_CHANGED] =
g_signal_new ("duration-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS, 0, NULL,
NULL, NULL, G_TYPE_NONE, 1, GST_TYPE_CLOCK_TIME);
signals[SIGNAL_DONE] =
g_signal_new ("done", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS, 0, NULL,
NULL, NULL, G_TYPE_NONE, 0, G_TYPE_INVALID);
signals[SIGNAL_ERROR] =
g_signal_new ("error", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS, 0, NULL,
NULL, NULL, G_TYPE_NONE, 2, G_TYPE_ERROR, GST_TYPE_STRUCTURE);
signals[SIGNAL_WARNING] =
g_signal_new ("warning", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS, 0, NULL,
NULL, NULL, G_TYPE_NONE, 2, G_TYPE_ERROR, GST_TYPE_STRUCTURE);
signals[SIGNAL_STATE_CHANGED] =
g_signal_new ("state-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS, 0, NULL,
NULL, NULL, G_TYPE_NONE, 1, GST_TYPE_TRANSCODER_STATE);
/**
* GstTranscoderSignalAdapter:transcoder:
*
* The #GstTranscoder tracked by the adapter.
*
* Since: 1.20
*/
param_specs[PROP_TRANSCODER] =
g_param_spec_object ("transcoder", "Transcoder",
"The GstTranscoder @self is tracking", GST_TYPE_TRANSCODER,
G_PARAM_READABLE);
g_object_class_install_properties (gobject_class, PROP_LAST, param_specs);
}
/**
* gst_transcoder_signal_adapter_get_transcoder:
* @self: The #GstTranscoderSignalAdapter
*
* Returns: (transfer full)(nullable): The #GstTranscoder @self is tracking
*
* Since: 1.20
*/
GstTranscoder *
gst_transcoder_signal_adapter_get_transcoder (GstTranscoderSignalAdapter * self)
{
return g_weak_ref_get (&self->transcoder);
}