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134 lines
4 KiB
C
134 lines
4 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2001 Thomas <thomas@apestaart.org>
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* 2005,2006 Wim Taymans <wim@fluendo.com>
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* 2013 Sebastian Dröge <sebastian@centricular.com>
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* Copyright (C) 2020 Huawei Technologies Co., Ltd.
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* @Author: Stéphane Cerveau <scerveau@collabora.com>
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*
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* audiomixer.c: AudioMixer element, N in, one out, samples are added
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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:element-liveadder
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* @title: liveadder
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*
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstaudiomixerelements.h"
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#include "gstaudiomixerorc.h"
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#include "gstaudiointerleave.h"
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/* Empty liveadder alias with non-zero latency */
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typedef GstAudioMixer GstLiveAdder;
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typedef GstAudioMixerClass GstLiveAdderClass;
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static GType gst_live_adder_get_type (void);
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#define GST_TYPE_LIVE_ADDER gst_live_adder_get_type ()
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G_DEFINE_TYPE (GstLiveAdder, gst_live_adder, GST_TYPE_AUDIO_MIXER);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (liveadder, "liveadder",
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GST_RANK_NONE, GST_TYPE_LIVE_ADDER, audiomixer_element_init (plugin));
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enum
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{
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LIVEADDER_PROP_LATENCY = 1
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};
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static void
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gst_live_adder_init (GstLiveAdder * self)
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{
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}
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static void
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gst_live_adder_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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case LIVEADDER_PROP_LATENCY:
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{
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GParamSpec *parent_spec =
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g_object_class_find_property (G_OBJECT_CLASS
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(gst_live_adder_parent_class), "latency");
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GObjectClass *pspec_class = g_type_class_peek (parent_spec->owner_type);
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GValue v = { 0 };
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g_value_init (&v, G_TYPE_UINT64);
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g_value_set_uint64 (&v, g_value_get_uint (value) * GST_MSECOND);
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G_OBJECT_CLASS (pspec_class)->set_property (object,
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parent_spec->param_id, &v, parent_spec);
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break;
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}
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_live_adder_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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switch (prop_id) {
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case LIVEADDER_PROP_LATENCY:
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{
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GParamSpec *parent_spec =
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g_object_class_find_property (G_OBJECT_CLASS
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(gst_live_adder_parent_class), "latency");
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GObjectClass *pspec_class = g_type_class_peek (parent_spec->owner_type);
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GValue v = { 0 };
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g_value_init (&v, G_TYPE_UINT64);
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G_OBJECT_CLASS (pspec_class)->get_property (object,
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parent_spec->param_id, &v, parent_spec);
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g_value_set_uint (value, g_value_get_uint64 (&v) / GST_MSECOND);
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break;
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}
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_live_adder_class_init (GstLiveAdderClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->set_property = gst_live_adder_set_property;
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gobject_class->get_property = gst_live_adder_get_property;
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g_object_class_install_property (gobject_class, LIVEADDER_PROP_LATENCY,
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g_param_spec_uint ("latency", "Buffer latency",
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"Additional latency in live mode to allow upstream "
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"to take longer to produce buffers for the current "
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"position (in milliseconds)", 0, G_MAXUINT,
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30, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
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}
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