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813c4b4fb7
Mainly (transfer xxx) and (nullable). Also fix some typo. https://bugzilla.gnome.org/show_bug.cgi?id=766459
139 lines
4.1 KiB
C
139 lines
4.1 KiB
C
/* GStreamer Editing Services
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* Copyright (C) <2013> Thibault Saunier <thibault.saunier@collabora.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION: gesaudiotrack
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* @short_description: A standard GESTrack for raw audio
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*
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* Sane default properties to specify and fixate the output stream are
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* set as restriction-caps.
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* It is advised, to modify these properties, to use
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* #ges_track_update_restriction_caps, setting them directly is
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* possible through #ges_track_set_restriction_caps, but not specifying
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* one of them can lead to negotiation issues, only use that function
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* if you actually know what you're doing :)
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*
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* The default properties are:
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* - format: S32LE
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* - channels: 2
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* - rate: 44100
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* - layout: interleaved
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*/
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#include "ges-internal.h"
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#include "ges-smart-adder.h"
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#include "ges-audio-track.h"
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#define DEFAULT_CAPS "audio/x-raw"
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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#define DEFAULT_RESTRICTION_CAPS "audio/x-raw, format=S32LE, channels=2, "\
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"rate=44100, layout=interleaved"
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#else
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#define DEFAULT_RESTRICTION_CAPS "audio/x-raw, format=S32BE, channels=2, "\
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"rate=44100, layout=interleaved"
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#endif
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struct _GESAudioTrackPrivate
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{
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gpointer nothing;
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};
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G_DEFINE_TYPE (GESAudioTrack, ges_audio_track, GES_TYPE_TRACK);
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/****************************************************
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* Private methods and utils *
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****************************************************/
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static GstElement *
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create_element_for_raw_audio_gap (GESTrack * track)
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{
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GstElement *elem;
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elem = gst_element_factory_make ("audiotestsrc", NULL);
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g_object_set (elem, "wave", 4, NULL);
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return elem;
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}
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/****************************************************
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* GObject vmethods implementations *
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****************************************************/
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static void
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ges_audio_track_init (GESAudioTrack * self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE ((self), GES_TYPE_AUDIO_TRACK,
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GESAudioTrackPrivate);
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}
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static void
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ges_audio_track_finalize (GObject * object)
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{
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/* TODO: Add deinitalization code here */
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G_OBJECT_CLASS (ges_audio_track_parent_class)->finalize (object);
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}
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static void
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ges_audio_track_class_init (GESAudioTrackClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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/* GESTrackClass *parent_class = GES_TRACK_CLASS (klass);
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*/
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g_type_class_add_private (klass, sizeof (GESAudioTrackPrivate));
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object_class->finalize = ges_audio_track_finalize;
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GES_TRACK_CLASS (klass)->get_mixing_element = ges_smart_adder_new;
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}
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/****************************************************
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* API implementation *
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****************************************************/
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/**
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* ges_audio_track_new:
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*
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* Creates a new #GESAudioTrack of type #GES_TRACK_TYPE_AUDIO and with generic
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* raw audio caps ("audio/x-raw");
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*
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* Returns: (transfer floating): A new #GESTrack
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*/
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GESAudioTrack *
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ges_audio_track_new (void)
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{
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GESAudioTrack *ret;
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GstCaps *caps = gst_caps_from_string (DEFAULT_CAPS);
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GstCaps *restriction_caps = gst_caps_from_string (DEFAULT_RESTRICTION_CAPS);
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ret = g_object_new (GES_TYPE_AUDIO_TRACK, "caps", caps,
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"track-type", GES_TRACK_TYPE_AUDIO, NULL);
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ges_track_set_create_element_for_gap_func (GES_TRACK (ret),
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create_element_for_raw_audio_gap);
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ges_track_set_restriction_caps (GES_TRACK (ret), restriction_caps);
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gst_caps_unref (caps);
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gst_caps_unref (restriction_caps);
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return ret;
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}
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