mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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For example when trying to get the property value in NULL state. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1258>
335 lines
9.3 KiB
C
335 lines
9.3 KiB
C
/*
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* (C) 2011 Collabora Ltd.
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* Contact: Youness Alaoui <youness.alaoui@collabora.co.uk>
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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-spanplc
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* @title: spanplc
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*
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* The spanplc (Packet Loss Concealment) element provides a synthetic
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* fill-in signal, to minimise the audible effect of lost packets in
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* VoIP applications
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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 "gstspanplc.h"
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#include <gst/audio/audio.h>
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G_DEFINE_TYPE (GstSpanPlc, gst_span_plc, GST_TYPE_ELEMENT);
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GST_DEBUG_CATEGORY_STATIC (gst_span_plc_debug);
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#define GST_CAT_DEFAULT gst_span_plc_debug
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enum
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{
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PROP_0,
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PROP_STATS,
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};
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static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-raw, format=\"" GST_AUDIO_NE (S16) "\", "
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"rate = " GST_AUDIO_RATE_RANGE " , channels = (int) 1")
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);
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-raw, format=\"" GST_AUDIO_NE (S16) "\", "
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"rate = " GST_AUDIO_RATE_RANGE " , channels = (int) 1")
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);
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static void gst_span_plc_dispose (GObject * object);
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static GstStateChangeReturn gst_span_plc_change_state (GstElement * element,
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GstStateChange transition);
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static void gst_span_plc_setcaps_sink (GstSpanPlc * plc, GstCaps * caps);
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static GstFlowReturn gst_span_plc_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buf);
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static gboolean gst_span_plc_event_sink (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static GstStructure *
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gst_span_plc_create_stats (GstSpanPlc * self)
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{
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GstStructure *s = NULL;
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GST_OBJECT_LOCK (self);
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if (self->plc_state) {
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s = gst_structure_new ("application/x-spanplc-stats",
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"num-pushed", G_TYPE_UINT64, self->num_pushed,
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"num-gap", G_TYPE_UINT64, self->num_gap,
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"plc-num-samples", G_TYPE_UINT64, self->plc_num_samples,
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"plc-duration", G_TYPE_UINT64, self->plc_duration,
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"pitch", G_TYPE_INT, self->plc_state->pitch,
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"pitch-offset", G_TYPE_INT, self->plc_state->pitch_offset, NULL);
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}
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GST_OBJECT_UNLOCK (self);
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return s;
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}
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static void
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gst_span_plc_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstSpanPlc *self = GST_SPAN_PLC (object);
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switch (prop_id) {
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case PROP_STATS:
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g_value_take_boxed (value, gst_span_plc_create_stats (self));
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break;
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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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/* initialize the plugin's class */
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static void
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gst_span_plc_class_init (GstSpanPlcClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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gst_element_class_add_static_pad_template (gstelement_class, &src_factory);
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gst_element_class_add_static_pad_template (gstelement_class, &sink_factory);
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gst_element_class_set_static_metadata (gstelement_class, "SpanDSP PLC",
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"Filter/Effect/Audio",
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"Adds packet loss concealment to audio",
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"Youness Alaoui <youness.alaoui@collabora.co.uk>");
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gobject_class->get_property = gst_span_plc_get_property;
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gobject_class->dispose = gst_span_plc_dispose;
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_span_plc_change_state);
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/**
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* GstSpanPlc:stats:
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*
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* Various decoder statistics. This property returns a GstStructure
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* with name application/x-spanplc-stats with the following fields:
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*
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* * #guint64 `num-pushed`: the number of packets pushed out.
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* * #guint64 `num-gap`: the number of gap packets received.
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* * #guint64 `plc-num-samples`: the number of samples generated using PLC
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* * #guint64 `plc-duration`: the total duration, in ns, of samples generated using PLC
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* * #guint `pitch`: pitch estimate, in Hz
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* * #guint `pitch-offset`: current offset in pitch period, in Hz
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*
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* Since: 1.18
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*/
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g_object_class_install_property (gobject_class, PROP_STATS,
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g_param_spec_boxed ("stats", "Statistics",
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"Various statistics", GST_TYPE_STRUCTURE,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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GST_DEBUG_CATEGORY_INIT (gst_span_plc_debug, "spanplc",
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0, "spanDSP's packet loss concealment");
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}
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static void
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gst_span_plc_init (GstSpanPlc * plc)
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{
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GST_DEBUG_OBJECT (plc, "init");
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plc->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
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plc->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
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gst_pad_set_chain_function (plc->sinkpad,
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GST_DEBUG_FUNCPTR (gst_span_plc_chain));
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gst_pad_set_event_function (plc->sinkpad,
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GST_DEBUG_FUNCPTR (gst_span_plc_event_sink));
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gst_element_add_pad (GST_ELEMENT (plc), plc->srcpad);
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gst_element_add_pad (GST_ELEMENT (plc), plc->sinkpad);
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plc->plc_state = NULL;
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GST_DEBUG_OBJECT (plc, "init complete");
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}
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static void
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gst_span_plc_dispose (GObject * object)
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{
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GstSpanPlc *plc = GST_SPAN_PLC (object);
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if (plc->plc_state)
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plc_free (plc->plc_state);
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plc->plc_state = NULL;
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G_OBJECT_CLASS (gst_span_plc_parent_class)->dispose (object);
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}
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static void
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gst_span_plc_flush (GstSpanPlc * plc, gboolean renew)
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{
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if (plc->plc_state)
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plc_free (plc->plc_state);
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if (renew)
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plc->plc_state = plc_init (NULL);
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else
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plc->plc_state = NULL;
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}
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static GstStateChangeReturn
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gst_span_plc_change_state (GstElement * element, GstStateChange transition)
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{
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GstSpanPlc *plc = GST_SPAN_PLC (element);
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GstStateChangeReturn ret;
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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gst_span_plc_flush (plc, TRUE);
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (gst_span_plc_parent_class)->change_state (element,
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transition);
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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GST_OBJECT_LOCK (plc);
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plc->num_pushed = 0;
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plc->num_gap = 0;
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plc->plc_num_samples = 0;
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plc->plc_duration = 0;
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GST_OBJECT_UNLOCK (plc);
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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gst_span_plc_flush (plc, FALSE);
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default:
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break;
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}
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return ret;
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}
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static void
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gst_span_plc_setcaps_sink (GstSpanPlc * plc, GstCaps * caps)
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{
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GstStructure *s = NULL;
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gint sample_rate;
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s = gst_caps_get_structure (caps, 0);
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if (!s)
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return;
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gst_structure_get_int (s, "rate", &sample_rate);
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if (sample_rate != plc->sample_rate) {
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GST_DEBUG_OBJECT (plc, "setcaps: got sample rate : %d", sample_rate);
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plc->sample_rate = sample_rate;
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gst_span_plc_flush (plc, TRUE);
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}
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}
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static GstFlowReturn
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gst_span_plc_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstSpanPlc *plc = GST_SPAN_PLC (parent);
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GstMapInfo map;
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buffer = gst_buffer_make_writable (buffer);
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gst_buffer_map (buffer, &map, GST_MAP_READWRITE);
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plc_rx (plc->plc_state, (int16_t *) map.data, map.size / 2);
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gst_buffer_unmap (buffer, &map);
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GST_OBJECT_LOCK (plc);
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plc->num_pushed++;
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GST_OBJECT_UNLOCK (plc);
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return gst_pad_push (plc->srcpad, buffer);
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}
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static void
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gst_span_plc_send_fillin (GstSpanPlc * plc, GstClockTime timestamp,
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GstClockTime duration)
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{
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guint buf_size;
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GstBuffer *buffer = NULL;
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GstMapInfo map;
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gint num_samples;
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buf_size = ((float) duration / GST_SECOND) * plc->sample_rate;
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buf_size *= sizeof (guint16);
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buffer = gst_buffer_new_and_alloc (buf_size);
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GST_DEBUG_OBJECT (plc, "Missing packet of %" GST_TIME_FORMAT
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" == %d bytes", GST_TIME_ARGS (duration), buf_size);
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gst_buffer_map (buffer, &map, GST_MAP_READWRITE);
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num_samples = plc_fillin (plc->plc_state, (int16_t *) map.data, map.size / 2);
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gst_buffer_unmap (buffer, &map);
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GST_BUFFER_PTS (buffer) = timestamp;
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GST_BUFFER_DURATION (buffer) = duration;
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GST_OBJECT_LOCK (plc);
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plc->num_gap++;
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plc->num_pushed++;
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plc->plc_num_samples += num_samples;
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plc->plc_duration += duration;
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GST_OBJECT_UNLOCK (plc);
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gst_pad_push (plc->srcpad, buffer);
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}
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static gboolean
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gst_span_plc_event_sink (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstSpanPlc *plc = GST_SPAN_PLC (parent);
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GST_DEBUG_OBJECT (plc, "received event %s", GST_EVENT_TYPE_NAME (event));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CAPS:
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{
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GstCaps *caps;
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gst_event_parse_caps (event, &caps);
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gst_span_plc_setcaps_sink (plc, caps);
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break;
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}
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case GST_EVENT_GAP:
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{
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GstClockTime timestamp;
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GstClockTime duration;
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gst_event_parse_gap (event, ×tamp, &duration);
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gst_span_plc_send_fillin (plc, timestamp, duration);
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gst_event_unref (event);
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return TRUE;
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}
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case GST_EVENT_FLUSH_STOP:
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gst_span_plc_flush (plc, TRUE);
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break;
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default:
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break;
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}
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return gst_pad_push_event (plc->srcpad, event);
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}
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