gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/play/gstplay-signal-adapter.c

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/* GStreamer
*
* Copyright (C) 2019-2020 Stephan Hesse <stephan@emliri.com>
* Copyright (C) 2020 Philippe Normand <philn@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 "gstplay.h"
#include "gstplay-signal-adapter.h"
#include "gstplay-message-private.h"
GST_DEBUG_CATEGORY_STATIC (gst_play_signal_adapter_debug);
#define GST_CAT_DEFAULT gst_play_signal_adapter_debug
enum
{
SIGNAL_URI_LOADED,
SIGNAL_POSITION_UPDATED,
SIGNAL_DURATION_CHANGED,
SIGNAL_STATE_CHANGED,
SIGNAL_BUFFERING,
SIGNAL_END_OF_STREAM,
SIGNAL_ERROR,
SIGNAL_WARNING,
SIGNAL_VIDEO_DIMENSIONS_CHANGED,
SIGNAL_MEDIA_INFO_UPDATED,
SIGNAL_VOLUME_CHANGED,
SIGNAL_MUTE_CHANGED,
SIGNAL_SEEK_DONE,
SIGNAL_LAST
};
enum
{
PROP_0,
PROP_PLAY,
PROP_LAST
};
static GParamSpec *param_specs[PROP_LAST] = { NULL, };
struct _GstPlaySignalAdapter
{
GObject parent;
GstBus *bus;
GstPlay *play;
GSource *source;
};
struct _GstPlaySignalAdapterClass
{
GObjectClass parent_class;
};
#define _do_init \
GST_DEBUG_CATEGORY_INIT (gst_play_signal_adapter_debug, "gst-play-signal-adapter", \
0, "GstPlay signal adapter")
#define parent_class gst_play_signal_adapter_parent_class
G_DEFINE_TYPE_WITH_CODE (GstPlaySignalAdapter, gst_play_signal_adapter,
G_TYPE_OBJECT, _do_init);
static guint signals[SIGNAL_LAST] = { 0, };
static void
gst_play_signal_adapter_emit (GstPlaySignalAdapter * self,
const GstStructure * message_data)
{
GstPlayMessage play_message_type;
g_return_if_fail (g_str_equal (gst_structure_get_name (message_data),
GST_PLAY_MESSAGE_DATA));
GST_LOG ("Emitting message %" GST_PTR_FORMAT, message_data);
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_TYPE,
GST_TYPE_PLAY_MESSAGE, &play_message_type, NULL);
switch (play_message_type) {
case GST_PLAY_MESSAGE_URI_LOADED:{
const gchar *uri =
gst_structure_get_string (message_data, GST_PLAY_MESSAGE_DATA_URI);
g_signal_emit (self, signals[SIGNAL_URI_LOADED], 0, uri);
break;
}
case GST_PLAY_MESSAGE_POSITION_UPDATED:{
GstClockTime pos = GST_CLOCK_TIME_NONE;
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_POSITION,
GST_TYPE_CLOCK_TIME, &pos, NULL);
g_signal_emit (self, signals[SIGNAL_POSITION_UPDATED], 0, pos);
break;
}
case GST_PLAY_MESSAGE_DURATION_CHANGED:{
GstClockTime duration = GST_CLOCK_TIME_NONE;
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_DURATION,
GST_TYPE_CLOCK_TIME, &duration, NULL);
g_signal_emit (self, signals[SIGNAL_DURATION_CHANGED], 0, duration);
break;
}
case GST_PLAY_MESSAGE_STATE_CHANGED:{
GstPlayState state = 0;
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_PLAY_STATE,
GST_TYPE_PLAY_STATE, &state, NULL);
g_signal_emit (self, signals[SIGNAL_STATE_CHANGED], 0, state);
break;
}
case GST_PLAY_MESSAGE_BUFFERING:{
guint percent = 0;
gst_structure_get (message_data,
GST_PLAY_MESSAGE_DATA_BUFFERING_PERCENT, G_TYPE_UINT, &percent, NULL);
g_signal_emit (self, signals[SIGNAL_BUFFERING], 0, percent);
break;
}
case GST_PLAY_MESSAGE_END_OF_STREAM:
g_signal_emit (self, signals[SIGNAL_END_OF_STREAM], 0);
break;
case GST_PLAY_MESSAGE_ERROR:{
GError *error = NULL;
GstStructure *details = NULL;
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_ERROR,
G_TYPE_ERROR, &error, GST_PLAY_MESSAGE_DATA_ERROR_DETAILS,
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_PLAY_MESSAGE_WARNING:{
GError *error = NULL;
GstStructure *details = NULL;
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_WARNING,
G_TYPE_ERROR, &error, GST_PLAY_MESSAGE_DATA_WARNING_DETAILS,
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;
}
case GST_PLAY_MESSAGE_VIDEO_DIMENSIONS_CHANGED:{
guint width = 0;
guint height = 0;
gst_structure_get (message_data,
GST_PLAY_MESSAGE_DATA_VIDEO_WIDTH, G_TYPE_UINT, &width,
GST_PLAY_MESSAGE_DATA_VIDEO_HEIGHT, G_TYPE_UINT, &height, NULL);
g_signal_emit (self, signals[SIGNAL_VIDEO_DIMENSIONS_CHANGED], 0,
width, height);
break;
}
case GST_PLAY_MESSAGE_MEDIA_INFO_UPDATED:{
GstPlayMediaInfo *media_info;
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_MEDIA_INFO,
GST_TYPE_PLAY_MEDIA_INFO, &media_info, NULL);
g_signal_emit (self, signals[SIGNAL_MEDIA_INFO_UPDATED], 0, media_info);
g_object_unref (media_info);
break;
}
case GST_PLAY_MESSAGE_VOLUME_CHANGED:{
gdouble volume;
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_VOLUME,
G_TYPE_DOUBLE, &volume, NULL);
g_signal_emit (self, signals[SIGNAL_VOLUME_CHANGED], 0, volume);
break;
}
case GST_PLAY_MESSAGE_MUTE_CHANGED:{
gboolean is_muted;
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_IS_MUTED,
G_TYPE_BOOLEAN, &is_muted, NULL);
g_signal_emit (self, signals[SIGNAL_MUTE_CHANGED], 0, is_muted);
break;
}
case GST_PLAY_MESSAGE_SEEK_DONE:{
GstClockTime pos;
gst_structure_get (message_data, GST_PLAY_MESSAGE_DATA_POSITION,
GST_TYPE_CLOCK_TIME, &pos, NULL);
g_signal_emit (self, signals[SIGNAL_SEEK_DONE], 0, pos);
break;
}
default:
g_assert_not_reached ();
break;
}
}
/*
* callback for the bus-message in-sync handling
*/
static GstBusSyncReply
gst_play_signal_adapter_bus_sync_handler
(GstBus * bus, GstMessage * message, gpointer user_data)
{
GstPlaySignalAdapter *self = GST_PLAY_SIGNAL_ADAPTER (user_data);
const GstStructure *message_data = gst_message_get_structure (message);
gst_play_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_play_signal_adapter_on_message (GstBus * bus,
GstMessage * message, gpointer user_data)
{
GstPlaySignalAdapter *self = GST_PLAY_SIGNAL_ADAPTER (user_data);
const GstStructure *message_data = gst_message_get_structure (message);
gst_play_signal_adapter_emit (self, message_data);
return TRUE;
}
/**
* gst_play_signal_adapter_new:
* @play: (transfer none): #GstPlay instance to emit signals for.
*
* A bus-watching #GSource will be created and attached to the the
* thread-default #GMainContext. The attached callback will emit the
* corresponding signal for the message received. Matching signals for play
* messages from the bus will be emitted by it on the created adapter object.
*
* Returns: (transfer full): A new #GstPlaySignalAdapter to connect signal handlers to.
*
* Since: 1.20
*/
GstPlaySignalAdapter *
gst_play_signal_adapter_new (GstPlay * play)
{
GstPlaySignalAdapter *self = NULL;
GMainContext *context = NULL;
g_return_val_if_fail (GST_IS_PLAY (play), NULL);
self = g_object_new (GST_TYPE_PLAY_SIGNAL_ADAPTER, NULL);
self->play = play;
self->bus = gst_play_get_message_bus (play);
self->source = gst_bus_create_watch (self->bus);
context = g_main_context_get_thread_default ();
g_source_attach (self->source, context);
g_source_set_callback (self->source,
(GSourceFunc) gst_play_signal_adapter_on_message, self, NULL);
return self;
}
/**
* gst_play_signal_adapter_new_with_main_context:
* @play: (transfer none): #GstPlay instance to emit signals for.
* @context: A #GMainContext on which the main-loop will process play bus messages on.
*
* 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 play messages from the bus will be emitted by
* it on the created adapter object.
*
* Returns: (transfer full): A new #GstPlaySignalAdapter to connect signal handlers to.
*
* Since: 1.20
*/
GstPlaySignalAdapter *
gst_play_signal_adapter_new_with_main_context (GstPlay * play,
GMainContext * context)
{
GstPlaySignalAdapter *self = NULL;
g_return_val_if_fail (GST_IS_PLAY (play), NULL);
g_return_val_if_fail (context != NULL, NULL);
self = g_object_new (GST_TYPE_PLAY_SIGNAL_ADAPTER, NULL);
self->play = play;
self->bus = gst_play_get_message_bus (play);
self->source = gst_bus_create_watch (self->bus);
g_source_attach (self->source, context);
g_source_set_callback (self->source,
(GSourceFunc) gst_play_signal_adapter_on_message, self, NULL);
return self;
}
/**
* gst_play_signal_adapter_new_sync_emit:
* @play: (transfer none): #GstPlay instance to emit signals for.
*
* Create an adapter that synchronously emits its signals, from the thread in
* which the messages have been posted.
*
* Returns: (transfer full): A new #GstPlaySignalAdapter to connect signal handlers to.
*
* Since: 1.20
*/
GstPlaySignalAdapter *
gst_play_signal_adapter_new_sync_emit (GstPlay * play)
{
GstBus *bus = NULL;
GstPlaySignalAdapter *self = NULL;
g_return_val_if_fail (GST_IS_PLAY (play), NULL);
bus = gst_play_get_message_bus (play);
self = g_object_new (GST_TYPE_PLAY_SIGNAL_ADAPTER, NULL);
self->play = play;
self->bus = bus;
gst_bus_set_sync_handler (self->bus,
gst_play_signal_adapter_bus_sync_handler, self, NULL);
return self;
}
/**
* gst_play_signal_adapter_get_play:
* @adapter: #GstPlaySignalAdapter instance
*
* Returns: (transfer none): The #GstPlay owning this signal adapter.
*
* Since: 1.20
*/
GstPlay *
gst_play_signal_adapter_get_play (GstPlaySignalAdapter * adapter)
{
g_return_val_if_fail (GST_IS_PLAY_SIGNAL_ADAPTER (adapter), NULL);
return adapter->play;
}
static void
gst_play_signal_adapter_init (GstPlaySignalAdapter * self)
{
self->source = NULL;
}
static void
gst_play_signal_adapter_dispose (GObject * object)
{
GstPlaySignalAdapter *self = GST_PLAY_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_play_signal_adapter_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstPlaySignalAdapter *self = GST_PLAY_SIGNAL_ADAPTER (object);
switch (prop_id) {
case PROP_PLAY:
g_value_set_object (value, self->play);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_play_signal_adapter_class_init (GstPlaySignalAdapterClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->dispose = gst_play_signal_adapter_dispose;
gobject_class->get_property = gst_play_signal_adapter_get_property;
param_specs[PROP_PLAY] =
g_param_spec_object ("play", "Play",
"GstPlay owning this adapter",
GST_TYPE_PLAY, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
signals[SIGNAL_URI_LOADED] =
g_signal_new ("uri-loaded", 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, G_TYPE_STRING);
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_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_PLAY_STATE);
signals[SIGNAL_BUFFERING] =
g_signal_new ("buffering", 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, G_TYPE_INT);
signals[SIGNAL_END_OF_STREAM] =
g_signal_new ("end-of-stream", 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);
/**
* GstPlaySignalAdapter::error:
* @adapter: The #GstPlaySignalAdapter
* @error: The error
* @details: (nullable): Additional error details
*
* Emitted on errors.
*/
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_VIDEO_DIMENSIONS_CHANGED] =
g_signal_new ("video-dimensions-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, 2, G_TYPE_UINT, G_TYPE_UINT);
signals[SIGNAL_MEDIA_INFO_UPDATED] =
g_signal_new ("media-info-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_PLAY_MEDIA_INFO);
signals[SIGNAL_VOLUME_CHANGED] =
g_signal_new ("volume-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, G_TYPE_DOUBLE);
signals[SIGNAL_MUTE_CHANGED] =
g_signal_new ("mute-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, G_TYPE_BOOLEAN);
/**
* GstPlaySignalAdapter::warning:
* @adapter: The #GstPlaySignalAdapter
* @error: The warning
* @details: (nullable): Additional warning details
*
* Emitted on warnings.
*/
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_SEEK_DONE] =
g_signal_new ("seek-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, 1, GST_TYPE_CLOCK_TIME);
g_object_class_install_properties (gobject_class, PROP_LAST, param_specs);
}