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/*
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* Copyright © 2010 Nokia Corporation.
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* This material, including documentation and any related
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* computer progrs, is protected by copyright controlled by
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* Nokia Corporation. All rights are reserved. Copying,
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* including reproducing, storing, adapting or translating, any
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* or all of this material requires the prior written consent of
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* Nokia Corporation. This material also contains confidential
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* information which may not be disclosed to others without the
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* prior written consent of Nokia Corporation.
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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 "gstamrmux.h"
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#include <stdlib.h>
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#include <string.h>
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#ifdef __SYMBIAN32__
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#include <gst/gstinfo.h>
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#endif
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/* AMR nb header value */
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const char* amrnbmagicnumber = "#!AMR\n";
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static void gst_amrmux_base_init (gpointer g_class);
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static void gst_amrmux_class_init (GstAmrMuxClass * klass);
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static void gst_amrmux_init ( GstAmrMux * filter, GstAmrMuxClass *filter_klass);
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static GstFlowReturn gst_amrmux_chain (GstPad * pad, GstBuffer * buf);
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static void gst_amrmux_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_amrmux_set_property (GObject *object, guint prop_id,
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const GValue *value, GParamSpec *pspec);
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static GstStateChangeReturn gst_amrmux_change_state (GstElement * element,
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GstStateChange transition);
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static void gst_amrmux_dispose(GObject * object);
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static GstElementClass *parent_class= NULL;
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static const GstElementDetails gst_amrmux_details =
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GST_ELEMENT_DETAILS ("AMR MUX Details",
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"Codec/Muxer/Audio",
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"Adaptive Multi-Rate Narrow-Band Muxer",
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"");
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static GstStaticPadTemplate sink_factory =
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GST_STATIC_PAD_TEMPLATE (
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"sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/amr")
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);
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static GstStaticPadTemplate source_factory =
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GST_STATIC_PAD_TEMPLATE (
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/amr")
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);
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enum {
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ARG_0,
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ARG_HEADER
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};
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GType
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gst_amrmux_get_type (void)
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{
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static GType gst_amrmux_type = 0;
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if (!gst_amrmux_type) {
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static const GTypeInfo amrmux_info = {
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sizeof (GstAmrMuxClass),
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gst_amrmux_base_init,
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NULL,
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(GClassInitFunc) gst_amrmux_class_init,
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NULL,
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NULL,
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sizeof (GstAmrMux),
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0,
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(GInstanceInitFunc) gst_amrmux_init,
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};
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gst_amrmux_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstAmrMux",
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&amrmux_info, 0);
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}
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return gst_amrmux_type;
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}
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static void
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gst_amrmux_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template(element_class,
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gst_static_pad_template_get(&sink_factory));
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gst_element_class_add_pad_template(element_class,
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gst_static_pad_template_get(&source_factory));
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gst_element_class_set_details (element_class, &gst_amrmux_details);
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}
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static void
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gst_amrmux_class_init ( GstAmrMuxClass * klass )
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{
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GObjectClass *object_class;
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GstElementClass *gstelement_class;
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gstelement_class = (GstElementClass *) klass;
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object_class = (GObjectClass *) klass;
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object_class->set_property = gst_amrmux_set_property;
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object_class->get_property = gst_amrmux_get_property;
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gstelement_class->change_state = gst_amrmux_change_state;
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object_class->dispose = gst_amrmux_dispose;
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parent_class = g_type_class_peek_parent(klass);
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HEADER,
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g_param_spec_boolean ("header", "header",
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"For writing AMR header", TRUE, G_PARAM_READWRITE));
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}
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static void gst_amrmux_dispose(GObject * object)
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{
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_amrmux_init( GstAmrMux * amrmux, GstAmrMuxClass *amrmux_klass)
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{
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GstElementClass *klass = GST_ELEMENT_CLASS (amrmux_klass);
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//By default we have to write header
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amrmux->writeheader= TRUE;
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//Add Sink pad to this element
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amrmux->sinkpad = gst_pad_new_from_template (
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gst_element_class_get_pad_template (klass, "sink"), "sink");
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gst_element_add_pad (GST_ELEMENT (amrmux), amrmux->sinkpad);
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//Add Src pad to this element
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amrmux->srcpad = gst_pad_new_from_template (
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gst_element_class_get_pad_template (klass, "src"), "src");
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gst_element_add_pad (GST_ELEMENT (amrmux), amrmux->srcpad);
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gst_pad_set_chain_function (amrmux->sinkpad, gst_amrmux_chain);
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}
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static void
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gst_amrmux_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstAmrMux *amrmux = GST_AMRMUX( object );
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switch (prop_id) {
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case ARG_HEADER:
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g_value_set_boolean (value, amrmux->writeheader);
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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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static void
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gst_amrmux_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstAmrMux *amrmux = GST_AMRMUX( object );
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switch (prop_id) {
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case ARG_HEADER:
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amrmux->writeheader = g_value_get_boolean (value);
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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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static GstFlowReturn
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gst_amrmux_chain (GstPad * pad, GstBuffer * buf)
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{
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gint8 *codecdata;
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guint8* amrdata;
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guint8* amrheaderstart;
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int codecdatasize = GST_BUFFER_SIZE(buf);
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int magicnumberlength = strlen( amrnbmagicnumber );
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GstAmrMux *amrmux = GST_AMRMUX (GST_PAD_PARENT (pad));
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if ( amrmux->writeheader )
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{
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buf = gst_buffer_make_writable( buf );
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//Allocate a buffer which will hold codec data + magic number
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amrdata = ( guint8* )g_malloc( GST_BUFFER_SIZE(buf) + magicnumberlength );
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//To save the starting address of amr data
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amrheaderstart = amrdata;
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//Copy magic number to newly allocated buffer
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memcpy( amrdata, amrnbmagicnumber, magicnumberlength);
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codecdata = (gint8*)GST_BUFFER_DATA (buf);
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//Move the pointer to the end of magic number
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amrdata += magicnumberlength;
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//Copy codec data to newly allocated buffer
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memcpy( amrdata , codecdata, codecdatasize );
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// free codec data from GstBuffer
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g_free( buf->malloc_data );
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//Copying the newly allocated buffer and size in GstBuffer
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buf->data = amrheaderstart;
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buf->malloc_data = amrheaderstart;
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buf->size+= magicnumberlength;
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//Do it only first time
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amrmux->writeheader = FALSE;
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}
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return gst_pad_push( amrmux->srcpad , buf );
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}
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static GstStateChangeReturn
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gst_amrmux_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret;
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GstAmrMux *amrmux = GST_AMRMUX (element);
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (G_UNLIKELY (ret == GST_STATE_CHANGE_FAILURE))
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_NULL:
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{
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amrmux->writeheader = TRUE;
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break;
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}
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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 gboolean
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plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "amrmux", GST_RANK_PRIMARY,
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GST_TYPE_AMRMUX);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"amrmux",
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"Add header to amr-nb encoded stream",
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plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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EXPORT_C GstPluginDesc* _GST_PLUGIN_DESC()
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{
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return &gst_plugin_desc;
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}
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