2002-01-19 15:02:09 +00:00
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/* GStreamer
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2001-12-22 23:27:31 +00:00
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gst/gst.h>
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#include "alaw-encode.h"
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#include "mulaw-conversion.h"
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#include "alaw-conversion.h"
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extern GstPadTemplate *alawenc_src_template, *alawenc_sink_template;
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/* Stereo signals and args */
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enum {
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/* FILL ME */
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LAST_SIGNAL
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};
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enum {
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ARG_0
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};
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static void gst_alawenc_class_init (GstALawEncClass *klass);
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static void gst_alawenc_init (GstALawEnc *alawenc);
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static void gst_alawenc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
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static void gst_alawenc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
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static void gst_alawenc_chain (GstPad *pad, GstBuffer *buf);
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static GstElementClass *parent_class = NULL;
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2002-01-19 15:02:09 +00:00
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/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 }; */
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2001-12-22 23:27:31 +00:00
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2002-01-13 22:27:25 +00:00
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/*
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2001-12-22 23:27:31 +00:00
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static GstPadNegotiateReturn
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alawenc_negotiate_sink (GstPad *pad, GstCaps **caps, gint counter)
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{
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GstCaps* tempcaps;
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GstALawEnc* alawenc=GST_ALAWENC (GST_OBJECT_PARENT (pad));
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if (*caps==NULL)
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return GST_PAD_NEGOTIATE_FAIL;
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tempcaps = gst_caps_copy(*caps);
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gst_caps_set(tempcaps,"format",GST_PROPS_STRING("int"));
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gst_caps_set(tempcaps,"law",GST_PROPS_INT(2));
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gst_caps_set(tempcaps,"depth",GST_PROPS_INT(8));
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gst_caps_set(tempcaps,"width",GST_PROPS_INT(8));
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gst_caps_set(tempcaps,"signed",GST_PROPS_BOOLEAN(FALSE));
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2002-01-13 22:27:25 +00:00
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if (gst_pad_try_set_caps (alawenc->srcpad, tempcaps))
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2001-12-22 23:27:31 +00:00
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{
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return GST_PAD_NEGOTIATE_AGREE;
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}
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else {
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gst_caps_unref (tempcaps);
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return GST_PAD_NEGOTIATE_FAIL;
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}
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}
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2002-01-13 22:27:25 +00:00
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*/
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2001-12-22 23:27:31 +00:00
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GType
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gst_alawenc_get_type(void) {
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static GType alawenc_type = 0;
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if (!alawenc_type) {
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static const GTypeInfo alawenc_info = {
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sizeof(GstALawEncClass), NULL,
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NULL,
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(GClassInitFunc)gst_alawenc_class_init,
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NULL,
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NULL,
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sizeof(GstALawEnc),
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0,
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(GInstanceInitFunc)gst_alawenc_init,
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};
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alawenc_type = g_type_register_static(GST_TYPE_ELEMENT, "GstALawEnc", &alawenc_info, 0);
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}
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return alawenc_type;
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}
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static void
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gst_alawenc_class_init (GstALawEncClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass*)klass;
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gstelement_class = (GstElementClass*)klass;
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parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
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gobject_class->set_property = gst_alawenc_set_property;
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gobject_class->get_property = gst_alawenc_get_property;
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}
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static void
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gst_alawenc_init (GstALawEnc *alawenc)
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{
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alawenc->sinkpad = gst_pad_new_from_template(alawenc_sink_template,"sink");
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alawenc->srcpad = gst_pad_new_from_template(alawenc_src_template,"src");
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2002-01-19 15:02:09 +00:00
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/*gst_pad_set_negotiate_function(alawenc->sinkpad, alawenc_negotiate_sink);*/
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2001-12-22 23:27:31 +00:00
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gst_element_add_pad(GST_ELEMENT(alawenc),alawenc->sinkpad);
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gst_pad_set_chain_function(alawenc->sinkpad,gst_alawenc_chain);
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gst_element_add_pad(GST_ELEMENT(alawenc),alawenc->srcpad);
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}
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static void
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gst_alawenc_chain (GstPad *pad,GstBuffer *buf)
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{
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GstALawEnc *alawenc;
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gint16 *linear_data;
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guint8 *alaw_data;
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GstBuffer* outbuf;
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g_return_if_fail(pad != NULL);
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g_return_if_fail(GST_IS_PAD(pad));
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g_return_if_fail(buf != NULL);
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alawenc = GST_ALAWENC(GST_OBJECT_PARENT (pad));
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g_return_if_fail(alawenc != NULL);
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g_return_if_fail(GST_IS_ALAWENC(alawenc));
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linear_data = (gint16 *)GST_BUFFER_DATA(buf);
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outbuf=gst_buffer_new();
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GST_BUFFER_DATA(outbuf) = (gchar*)g_new(gint16,GST_BUFFER_SIZE(buf)/4);
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GST_BUFFER_SIZE(outbuf) = GST_BUFFER_SIZE(buf)/2;
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alaw_data = (guint8*)GST_BUFFER_DATA(outbuf);
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mulaw_encode(linear_data,alaw_data,GST_BUFFER_SIZE(outbuf));
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isdn_audio_ulaw2alaw(alaw_data,GST_BUFFER_SIZE(outbuf));
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gst_buffer_unref(buf);
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gst_pad_push(alawenc->srcpad,outbuf);
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}
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static void
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gst_alawenc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
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{
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GstALawEnc *alawenc;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail(GST_IS_ALAWENC(object));
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alawenc = GST_ALAWENC(object);
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switch (prop_id) {
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default:
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break;
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}
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}
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static void
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gst_alawenc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
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{
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GstALawEnc *alawenc;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail(GST_IS_ALAWENC(object));
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alawenc = GST_ALAWENC(object);
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switch (prop_id) {
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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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