/* 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 (GESSource * source); static void ges_audio_test_source_class_init (GESAudioTestSourceClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GESSourceClass *source_class = GES_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 (GESSource * source) { GESAudioTestSource *self; GstElement *ret; const gchar *props[] = { "volume", "freq", NULL }; self = (GESAudioTestSource *) source; 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 (GES_TRACK_ELEMENT (self), 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); } /* Creates a new #GESAudioTestSource. * * Returns: (transfer floating) (nullable): The newly created #GESAudioTestSource. */ GESAudioTestSource * ges_audio_test_source_new (void) { GESAudioTestSource *res; GESAsset *asset = ges_asset_request (GES_TYPE_AUDIO_TEST_SOURCE, NULL, NULL); res = GES_AUDIO_TEST_SOURCE (ges_asset_extract (asset, NULL)); gst_object_unref (asset); return res; }