gstreamer/ges/ges-audio-test-source.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

214 lines
5.6 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2010 Brandon Lewis <brandon.lewis@collabora.co.uk>
* 2010 Nokia Corporation
*
* 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.
*/
/**
* SECTION:gesaudiotestsource
* @title: GESAudioTestSource
* @short_description: produce a simple test waveform or silence
*
* Outputs a test audio stream using audiotestsrc. The default property values
* output silence. Useful for testing pipelines, or to fill gaps in an audio
* track.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges-track-element.h"
#include "ges-audio-test-source.h"
#define DEFAULT_VOLUME 1.0
struct _GESAudioTestSourcePrivate
{
gdouble freq;
gdouble volume;
};
enum
{
PROP_0,
};
G_DEFINE_TYPE_WITH_PRIVATE (GESAudioTestSource, ges_audio_test_source,
GES_TYPE_AUDIO_SOURCE);
static void ges_audio_test_source_get_property (GObject * object, guint
property_id, GValue * value, GParamSpec * pspec);
static void ges_audio_test_source_set_property (GObject * object, guint
property_id, const GValue * value, GParamSpec * pspec);
static GstElement *ges_audio_test_source_create_source (GESTrackElement * self);
static void
ges_audio_test_source_class_init (GESAudioTestSourceClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESAudioSourceClass *source_class = GES_AUDIO_SOURCE_CLASS (klass);
object_class->get_property = ges_audio_test_source_get_property;
object_class->set_property = ges_audio_test_source_set_property;
source_class->create_source = ges_audio_test_source_create_source;
}
static void
ges_audio_test_source_init (GESAudioTestSource * self)
{
self->priv = ges_audio_test_source_get_instance_private (self);
self->priv->freq = 440;
self->priv->volume = DEFAULT_VOLUME;
}
static void
ges_audio_test_source_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec)
{
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_audio_test_source_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec)
{
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static GstElement *
ges_audio_test_source_create_source (GESTrackElement * trksrc)
{
GESAudioTestSource *self;
GstElement *ret;
const gchar *props[] = { "volume", "freq", NULL };
self = (GESAudioTestSource *) trksrc;
ret = gst_element_factory_make ("audiotestsrc", NULL);
g_object_set (ret, "volume", (gdouble) self->priv->volume, "freq", (gdouble)
self->priv->freq, NULL);
ges_track_element_add_children_props (trksrc, ret, NULL, NULL, props);
return ret;
}
/**
* ges_audio_test_source_set_freq:
* @self: a #GESAudioTestSource
* @freq: The frequency you want to apply on @self
*
* Lets you set the frequency applied on the track element
*/
void
ges_audio_test_source_set_freq (GESAudioTestSource * self, gdouble freq)
{
GstElement *element =
ges_track_element_get_element (GES_TRACK_ELEMENT (self));
self->priv->freq = freq;
if (element) {
GValue val = { 0 };
g_value_init (&val, G_TYPE_DOUBLE);
g_value_set_double (&val, freq);
ges_track_element_set_child_property (GES_TRACK_ELEMENT (self), "freq",
&val);
}
}
/**
* ges_audio_test_source_set_volume:
* @self: a #GESAudioTestSource
* @volume: The volume you want to apply on @self
*
* Sets the volume of the test audio signal.
*/
void
ges_audio_test_source_set_volume (GESAudioTestSource * self, gdouble volume)
{
GstElement *element =
ges_track_element_get_element (GES_TRACK_ELEMENT (self));
self->priv->volume = volume;
if (element) {
GValue val = { 0 };
g_value_init (&val, G_TYPE_DOUBLE);
g_value_set_double (&val, volume);
ges_track_element_set_child_property (GES_TRACK_ELEMENT (self), "volume",
&val);
}
}
/**
* ges_audio_test_source_get_freq:
* @self: a #GESAudioTestSource
*
* Get the current frequency of @self.
*
* Returns: The current frequency of @self.
*/
double
ges_audio_test_source_get_freq (GESAudioTestSource * self)
{
GValue val = { 0 };
ges_track_element_get_child_property (GES_TRACK_ELEMENT (self), "freq", &val);
return g_value_get_double (&val);
}
/**
* ges_audio_test_source_get_volume:
* @self: a #GESAudioTestSource
*
* Get the current volume of @self.
*
* Returns: The current volume of @self
*/
double
ges_audio_test_source_get_volume (GESAudioTestSource * self)
{
GValue val = { 0 };
ges_track_element_get_child_property (GES_TRACK_ELEMENT (self), "volume",
&val);
return g_value_get_double (&val);
}
/**
* ges_audio_test_source_new:
*
* Creates a new #GESAudioTestSource.
*
* Returns: (transfer floating) (nullable): The newly created #GESAudioTestSource.
*/
GESAudioTestSource *
ges_audio_test_source_new (void)
{
return g_object_new (GES_TYPE_AUDIO_TEST_SOURCE, "track-type",
GES_TRACK_TYPE_AUDIO, NULL);
}