/*
 *			GPAC - Multimedia Framework C SDK
 *
 *			Copyright (c) Jean Le Feuvre 2000-2005
 *					All rights reserved
 *
 *  This file is part of GPAC / Media terminal sub-project
 *
 *  GPAC is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *   
 *  GPAC is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *   
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *
 */

#include <gpac/internal/terminal_dev.h>
#include <gpac/utf.h>
#include <gpac/nodes_x3d.h>
#include <gpac/constants.h>
/*for screen to BIFS coordinate mapping (MouseSensor) */
#include <gpac/renderer.h>

#include "input_sensor.h"

#if GPAC_HTK_DEMO

void HTK_Init(const char *htk_path);
void HTK_Close(void);
void HTK_SetDictionary(char *dicofile);
void HTK_DoDetection(void);
const char *HTK_GetWord();
int HTK_GetWordIndex();
float HTK_GetWordScore();
void StartHTK(ISPriv *is_dec);

static u32 htk_num_users = 0;
#endif


/*
				input sensor decoder(s) handling
*/

GF_Err IS_Configure(GF_BaseDecoder *plug, GF_InlineScene *scene, Bool is_remote)
{
	ISPriv *is = (ISPriv *)plug->privateStack;
	/*we can only deal with encoded content (for now)*/
	if (!scene->scene_codec) return GF_NOT_SUPPORTED;
	is->scene = scene;
	is->is_local = !is_remote;
	return GF_OK;
}


static void add_field(ISPriv *priv, u32 fieldType, const char *fieldName)
{
	GF_FieldInfo *field = (GF_FieldInfo *) malloc(sizeof(GF_FieldInfo));
	memset(field, 0, sizeof(GF_FieldInfo));
	field->fieldType = fieldType;
	field->far_ptr = gf_sg_vrml_field_pointer_new(fieldType);
	field->name = (const char *) fieldName;
	field->fieldIndex = gf_list_count(priv->ddf);
	gf_list_add(priv->ddf, field);
}

static GF_Err IS_AttachStream(GF_BaseDecoder *plug, 
									 u16 ES_ID, 
									 char *decSpecInfo, 
									 u32 decSpecInfoSize, 
									 u16 DependsOnES_ID,
									 u32 objectTypeIndication, 
									 Bool Upstream)
{
	GF_BitStream *bs;
	u32 len, size, i;
	char devName[255];
	u16 termSeq[20];

	ISPriv *is = (ISPriv *)plug->privateStack;
	if (Upstream) return GF_NOT_SUPPORTED;
	if (!decSpecInfo) return GF_NON_COMPLIANT_BITSTREAM;

	/*no more than one UI stream per object*/
	if (is->ES_ID) return GF_NOT_SUPPORTED;
	is->ES_ID = ES_ID;
	/*parse config*/
	bs = gf_bs_new(decSpecInfo, decSpecInfoSize, GF_BITSTREAM_READ);
	len = gf_bs_read_int(bs, 8);
	for (i=0; i<len; i++) {
		devName[i] = gf_bs_read_int(bs, 8);
	}
	devName[i] = 0;
	size = len + 1;

	is->type = 0;
	if (!stricmp(devName, "KeySensor")) {
		is->type = IS_KeySensor;
		add_field(is, GF_SG_VRML_SFINT32, "keyPressed");
		add_field(is, GF_SG_VRML_SFINT32, "keyReleased");
		add_field(is, GF_SG_VRML_SFINT32, "actionKeyPressed");
		add_field(is, GF_SG_VRML_SFINT32, "actionKeyReleased");
		add_field(is, GF_SG_VRML_SFBOOL, "shiftKeyPressed");
		add_field(is, GF_SG_VRML_SFBOOL, "controlKeyPressed");
		add_field(is, GF_SG_VRML_SFBOOL, "altKeyPressed");

	} else if (!stricmp(devName, "StringSensor")) {
		is->type = IS_StringSensor;
		add_field(is, GF_SG_VRML_SFSTRING, "enteredText");
		add_field(is, GF_SG_VRML_SFSTRING, "finalText");

		is->termChar = '\r';
		is->delChar = '\b';

		/*get escape chars if any specified*/
		if (size<decSpecInfoSize) {
			const char *src = decSpecInfo + size;
			gf_utf8_mbstowcs(termSeq, decSpecInfoSize - size, &src);
			is->termChar = termSeq[0];
			is->delChar = termSeq[1];
		}
	} else if (!stricmp(devName, "Mouse")) {
		is->type = IS_Mouse;
		add_field(is, GF_SG_VRML_SFVEC2F, "position");
		add_field(is, GF_SG_VRML_SFBOOL, "leftButtonDown");
		add_field(is, GF_SG_VRML_SFBOOL, "middleButtonDown");
		add_field(is, GF_SG_VRML_SFBOOL, "rightButtonDown");
		add_field(is, GF_SG_VRML_SFFLOAT, "wheel");

#if GPAC_HTK_DEMO
	} else if (!stricmp(devName, "HTKSensor")) {
		FILE *f;
		u32 nb_word, nbPhone, c, j;
		char szPh[3];
		char szName[1024];
		char *szPath = gf_cfg_get_key(is->scene->root_od->term->user->config, "HTK", "HTKDirectory");
		if (!szPath) szPath = gf_cfg_get_key(is->scene->root_od->term->user->config, "General", "ModulesDirectory");
		strcpy(is->szHTKPath, szPath);
		if (szPath[strlen(szPath)-1] != GF_PATH_SEPARATOR) is->szHTKPath[strlen(szPath)] = GF_PATH_SEPARATOR;

		add_field(is, GF_SG_VRML_SFSTRING, "word");
		add_field(is, GF_SG_VRML_SFINT32, "wordIndex");
		add_field(is, GF_SG_VRML_SFFLOAT, "wordScore");
	
		if (!htk_num_users) {
			HTK_Init(is->szHTKPath);
			htk_num_users++;
		}
		
		sprintf(szName, "HTKD_%d", (u32) is);
		strcat(is->szHTKPath, szName);

		f = fopen(is->szHTKPath, "wt");
		szPh[2] = 0;
		nb_word = gf_bs_read_int(bs, 8);
		for (i=0; i<nb_word; i++) {
			nbPhone = gf_bs_read_int(bs, 8);
			while ((c=gf_bs_read_int(bs, 8))) fprintf(f, "%c", c);
			fprintf(f, " ");
			for (j=0; j<nbPhone; j++) {
				gf_bs_read_data(bs, szPh, 2);
				if (j) fprintf(f, " ");
				if (!stricmp(szPh, "vc")) fprintf(f, "vcl");
				else fprintf(f, "%s", szPh);
			}
			fprintf(f, "\n");
		}
		fprintf(f, "RIEN sp\nSENT-END [] endsil\nSENT-START [] inisil\n");
		fclose(f);
		is->type = IS_HTKSensor;

		StartHTK(is);
#endif
	
	}
	gf_bs_del(bs);
	return GF_OK;
}

static GF_Err IS_DetachStream(GF_BaseDecoder *plug, u16 ES_ID)
{
	ISPriv *is = (ISPriv *)plug->privateStack;
	is->ES_ID = 0;
#if GPAC_HTK_DEMO
	if (htk_num_users) {
		htk_num_users--;
		if (!htk_num_users) {
			while (is->htk_running) gf_sleep(10);
			HTK_Close();
		}
	}
#endif
	return GF_OK;
}

static GF_Err IS_GetCapabilities(GF_BaseDecoder *plug, GF_CodecCapability *capability)
{
	capability->cap.valueInt = 0;
	return GF_OK;
}

static GF_Err IS_SetCapabilities(GF_BaseDecoder *plug, const GF_CodecCapability capability)
{
	return GF_OK;
}

static GF_Err IS_ProcessData(GF_SceneDecoder *plug, char *inBuffer, u32 inBufferLength, 
								u16 ES_ID, u32 AU_time, u32 mmlevel)
{
	u32 i, j, count;
	Double scene_time;
	GF_BitStream *bs;
	GF_FieldInfo *field;
	ISStack *st;
	ISPriv *priv = (ISPriv *)plug->privateStack;
	GF_Err e = GF_OK;

	/*decode data frame except if local stringSensor*/
	bs = gf_bs_new(inBuffer, inBufferLength, GF_BITSTREAM_READ);
	i=0;
	while ((field = (GF_FieldInfo *)gf_list_enum(priv->ddf, &i))) {
		/*store present flag in eventIn for command skip - this is an ugly hack but it works since DDF don't have event types*/
		field->eventType = gf_bs_read_int(bs, 1);
		/*parse val ourselves (we don't want to depend on bifs codec)*/
		if (field->eventType) {
			switch (field->fieldType) {
			case GF_SG_VRML_SFBOOL: * ((SFBool *) field->far_ptr) = (SFBool) gf_bs_read_int(bs, 1); break;
			case GF_SG_VRML_SFFLOAT: *((SFFloat *)field->far_ptr) = FLT2FIX( gf_bs_read_float(bs) ); break;
			case GF_SG_VRML_SFINT32: *((SFInt32 *)field->far_ptr) = (s32) gf_bs_read_int(bs, 32); break;
			case GF_SG_VRML_SFTIME: *((SFTime *)field->far_ptr) = gf_bs_read_double(bs); break;
			case GF_SG_VRML_SFVEC2F:
				((SFVec2f *)field->far_ptr)->x = FLT2FIX( gf_bs_read_float(bs) );
				((SFVec2f *)field->far_ptr)->y = FLT2FIX( gf_bs_read_float(bs) );
				break;
			case GF_SG_VRML_SFVEC3F:
				((SFVec3f *)field->far_ptr)->x = FLT2FIX( gf_bs_read_float(bs) );
				((SFVec3f *)field->far_ptr)->y = FLT2FIX( gf_bs_read_float(bs) );
				((SFVec3f *)field->far_ptr)->z = FLT2FIX( gf_bs_read_float(bs) );
				break;
			case GF_SG_VRML_SFCOLOR:
				((SFColor *)field->far_ptr)->red = FLT2FIX( gf_bs_read_float(bs) );
				((SFColor *)field->far_ptr)->green = FLT2FIX( gf_bs_read_float(bs) );
				((SFColor *)field->far_ptr)->blue = FLT2FIX( gf_bs_read_float(bs) );
				break;
			case GF_SG_VRML_SFVEC4F:
			case GF_SG_VRML_SFROTATION:
				((SFRotation *)field->far_ptr)->x = FLT2FIX( gf_bs_read_float(bs) );
				((SFRotation *)field->far_ptr)->y = FLT2FIX( gf_bs_read_float(bs) );
				((SFRotation *)field->far_ptr)->z = FLT2FIX( gf_bs_read_float(bs) );
				((SFRotation *)field->far_ptr)->q = FLT2FIX( gf_bs_read_float(bs) );
				break;

			case GF_SG_VRML_SFSTRING:
			{
				u32 size, length;
				size = gf_bs_read_int(bs, 5);
				length = gf_bs_read_int(bs, size);
				if (gf_bs_available(bs) < length) return GF_NON_COMPLIANT_BITSTREAM;

				if ( ((SFString *)field->far_ptr)->buffer ) free( ((SFString *)field->far_ptr)->buffer);
				((SFString *)field->far_ptr)->buffer = (char*)malloc(sizeof(char)*(length+1));
				memset(((SFString *)field->far_ptr)->buffer , 0, length+1);
				for (j=0; j<length; j++) {
					 ((SFString *)field->far_ptr)->buffer[j] = gf_bs_read_int(bs, 8);
				}
			}
				break;
			}
		}
	}
	gf_bs_del(bs);

	/*special case for StringSensor in local mode: lookup for special chars*/
	if ((priv->type == IS_StringSensor) && priv->is_local) {
		char tmp_utf8[5000];
		const unsigned short *ptr;
		u32 len;
		GF_FieldInfo *field1 = (GF_FieldInfo *)gf_list_get(priv->ddf, 0);
		GF_FieldInfo *field2 = (GF_FieldInfo *)gf_list_get(priv->ddf, 1);
		SFString *inText = (SFString *) field1->far_ptr;
		SFString *outText = (SFString *) field2->far_ptr;

		field1->eventType = field2->eventType = 0;
		priv->enteredText[priv->text_len] = (short) '\0';

		len = gf_utf8_wcslen(priv->enteredText);
		if (len && (priv->enteredText[len-1] == priv->termChar)) {
			ptr = priv->enteredText;
			len = gf_utf8_wcstombs(tmp_utf8, 5000, &ptr);
			if (outText->buffer) free(outText->buffer);
			outText->buffer = (char*)malloc(sizeof(char) * (len+1));
			memcpy(outText->buffer, tmp_utf8, sizeof(char) * len);
			outText->buffer[len] = 0;
			if (inText->buffer) free(inText->buffer);
			inText->buffer = NULL;
			priv->text_len = 0;

			field1->eventType = field2->eventType = 1;
		} else {
			if (priv->delChar) {
				/*remove chars*/
				if ((len>1) && (priv->enteredText[len-1] == priv->delChar)) {
					priv->enteredText[len-1] = (short) '\0';
					len--;
					if (len) {
						priv->enteredText[len-1] = (short) '\0';
						len--;
					}
				}
			}
			priv->text_len = len;
			ptr = priv->enteredText;
			len = gf_utf8_wcstombs(tmp_utf8, 5000, &ptr);
			if (inText->buffer) free(inText->buffer);
			inText->buffer = (char*)malloc(sizeof(char) * (len+1));
			memcpy(inText->buffer, tmp_utf8, sizeof(char) * len);
			inText->buffer[len] = 0;
			field1->eventType = 1;
		}
	}

	/*apply it*/
	i=0;
	while ((st = (ISStack*)gf_list_enum(priv->is_nodes, &i))) {
		assert(st->is);
		assert(st->mo);
		if (!st->is->enabled) continue;

		count = gf_list_count(st->is->buffer.commandList);
		scene_time = gf_is_get_time(priv->scene);
		for (j=0; j<count; j++) {
			GF_Command *com = (GF_Command *)gf_list_get(st->is->buffer.commandList, j);
			GF_FieldInfo *field = (GF_FieldInfo *)gf_list_get(priv->ddf, j);
			GF_CommandField *info = (GF_CommandField *)gf_list_get(com->command_fields, 0);
			if (info && field && field->eventType) {
				gf_sg_vrml_field_copy(info->field_ptr, field->far_ptr, field->fieldType);
				gf_sg_command_apply(priv->scene->graph, com, scene_time);
			}
		}
	}
	return e;
}

void ISDec_Delete(GF_BaseDecoder *plug)
{
	ISPriv *priv = (ISPriv *)plug->privateStack;
	gf_list_del(priv->is_nodes);

	while (gf_list_count(priv->ddf)) {
		GF_FieldInfo *fi = (GF_FieldInfo *)gf_list_get(priv->ddf, 0);
		gf_list_rem(priv->ddf, 0);
		gf_sg_vrml_field_pointer_del(fi->far_ptr, fi->fieldType);
		free(fi);
	}
	gf_list_del(priv->ddf);
#if GPAC_HTK_DEMO
	gf_th_del(priv->th);
#endif
	free(priv);
	free(plug);
}


GF_BaseDecoder *NewISCodec(u32 PL)
{
	ISPriv *priv;
	GF_SceneDecoder *tmp;
	
	tmp = (GF_SceneDecoder*) malloc(sizeof(GF_SceneDecoder));
	if (!tmp) return NULL;
	memset(tmp, 0, sizeof(GF_SceneDecoder));

	priv = (ISPriv *) malloc(sizeof(ISPriv));
	memset(priv, 0, sizeof(ISPriv));

	priv->is_nodes = gf_list_new();
	priv->ddf = gf_list_new();

	tmp->privateStack = priv;

	tmp->AttachStream = IS_AttachStream;
	tmp->DetachStream = IS_DetachStream;
	tmp->GetCapabilities = IS_GetCapabilities;
	tmp->SetCapabilities = IS_SetCapabilities;
	tmp->ProcessData = IS_ProcessData;
	/*we don't use this...*/
	tmp->AttachScene = NULL;

	GF_REGISTER_MODULE_INTERFACE(tmp, GF_SCENE_DECODER_INTERFACE, "GPAC InputSensor Decoder", "gpac distribution")

#if GPAC_HTK_DEMO
	priv->th = gf_th_new();
#endif
	return (GF_BaseDecoder *) tmp;
}

/*
				input sensor node handling
*/
static void IS_Unregister(ISStack *st)
{
	u32 i;
	GF_ObjectManager *odm;
	ISPriv *is_dec;
	odm = st->mo->odm;
	if (!odm) return;

	assert(odm->codec && (odm->codec->type == GF_STREAM_INTERACT));

	/*get IS dec*/
	is_dec = (ISPriv*)odm->codec->decio->privateStack;
	for (i=0; i<gf_list_count(is_dec->is_nodes); i++) {
		ISStack *tmp = (ISStack *)gf_list_get(is_dec->is_nodes, i);
		if (tmp == st) {
			gf_list_rem(is_dec->is_nodes, i);
			i--;
		}
	}
	/*stop stream*/
	if (st->mo->num_open) gf_mo_stop(st->mo);
	st->mo = NULL;
	st->registered = 0;
}

static void IS_Register(GF_Node *n)
{
	GF_ObjectManager *odm;
	ISPriv *is_dec;
	ISStack *st = (ISStack *)gf_node_get_private(n);
	odm = st->mo->odm;
	if (!odm) return;

	assert(odm->codec && (odm->codec->type == GF_STREAM_INTERACT));

	/*get IS dec*/
	is_dec = (ISPriv*)odm->codec->decio->privateStack;
	gf_list_add(is_dec->is_nodes, st);
	st->registered = 1;
#if GPAC_HTK_DEMO
	StartHTK(is_dec);
#endif
	/*start stream*/
	gf_mo_play(st->mo, 0, -1, 0);

	gf_term_rem_render_node(odm->term, n);
}

static void RenderInputSensor(GF_Node *node, void *rs, Bool is_destroy)
{
	ISStack *st = (ISStack*)gf_node_get_private(node);
	M_InputSensor *is = (M_InputSensor *)node;

	if (is_destroy) {
		GF_InlineScene *is;
		if (st->registered) IS_Unregister(st);
		is = (GF_InlineScene*)gf_sg_get_private(gf_node_get_graph(node));
		gf_term_rem_render_node(is->root_od->term, node);
		free(st);
	} else {
		/*get decoder object */
		if (!st->mo) st->mo = gf_mo_find(node, &is->url, 0);
		/*register with decoder*/
		if (st->mo && !st->registered) IS_Register(node);
	}
}


void InitInputSensor(GF_InlineScene *is, GF_Node *node)
{
	ISStack *stack;
	GF_SAFEALLOC(stack, ISStack);
	stack->is = (M_InputSensor *) node;
	gf_node_set_private(node, stack);
	gf_node_set_callback_function(node, RenderInputSensor);
	gf_term_add_render_node(is->root_od->term, node);
}

/*check only URL changes*/
void InputSensorModified(GF_Node *node)
{
#if GPAC_HTK_DEMO
	GF_ObjectManager *odm;
	ISPriv *is_dec;
#endif
	GF_MediaObject *mo;
	ISStack *st = (ISStack *)gf_node_get_private(node);

	mo = gf_mo_find(node, &st->is->url, 0);
	if ((mo!=st->mo) || !st->registered){
		if (mo!=st->mo) {
			if (st->mo) IS_Unregister(st);
			st->mo = mo;
		}
		if (st->is->enabled) 
			IS_Register(node);
		else
			return;
	} else if (!st->is->enabled) {
		IS_Unregister(st);
		st->mo = NULL;
		return;
	}

#if GPAC_HTK_DEMO
	/*turn audio analyse on/off*/
	if (!st->is_dec || !st->is_dec->od_man) return;
	odm = st->is_dec->od_man;
	assert(odm->codec && (odm->codec->type == GF_STREAM_INTERACT));
	/*get IS dec*/
	is_dec = odm->codec->decio->privateStack;
	StartHTK(is_dec);
#endif
}



/*
				input sensor DDF generations (user interface)
*/

void gf_term_mouse_input(GF_Terminal *term, GF_EventMouse *event)
{
	s32 X, Y;
	u32 left_but_down, middle_but_down, right_but_down;
	SFFloat wheel_pos;
	u32 i;
	GF_Codec *cod;
	GF_BitStream *bs;
	GF_SLHeader slh;
	char *buf;
	u32 buf_size;
	Fixed bX, bY;

	if (!term || !gf_list_count(term->input_streams)) return;

	X = event->x;
	Y = event->y;
	left_but_down = middle_but_down = right_but_down = 0;
	wheel_pos = 0;
	switch (event->type) {
	case GF_EVENT_MOUSEDOWN:
		if (event->button==GF_MOUSE_RIGHT) right_but_down = 2;
		else if (event->button==GF_MOUSE_MIDDLE) middle_but_down = 2;
		else if (event->button==GF_MOUSE_LEFT) left_but_down = 2;
		break;
	case GF_EVENT_MOUSEUP:
		if (event->button==GF_MOUSE_RIGHT) right_but_down = 1;
		else if (event->button==GF_MOUSE_MIDDLE) middle_but_down = 1;
		else if (event->button==GF_MOUSE_LEFT) left_but_down = 1;
		break;
	case GF_EVENT_MOUSEWHEEL: wheel_pos = event->wheel_pos; break;
	case GF_EVENT_MOUSEMOVE: break;
	default: return;
	}

	/*get BIFS coordinates*/
	gf_sr_map_point(term->renderer, X, Y, &bX, &bY);

	bs = gf_bs_new(NULL, 0, GF_BITSTREAM_WRITE);

	/*If wheel is specified disable X and Y (bug from MS wheel handling)*/
	if (wheel_pos) {
		gf_bs_write_int(bs, 0, 1);
	} else {
		gf_bs_write_int(bs, 1, 1);
		gf_bs_write_float(bs, FIX2FLT(bX));
		gf_bs_write_float(bs, FIX2FLT(bY));
	}
	gf_bs_write_int(bs, left_but_down ? 1 : 0, 1);
	if (left_but_down) gf_bs_write_int(bs, left_but_down-1, 1);
	gf_bs_write_int(bs, middle_but_down ? 1 : 0, 1);
	if (middle_but_down) gf_bs_write_int(bs, middle_but_down-1, 1);
	gf_bs_write_int(bs, right_but_down ? 1 : 0, 1);
	if (right_but_down) gf_bs_write_int(bs, right_but_down-1, 1);
	if (wheel_pos==0) {
		gf_bs_write_int(bs, 0, 1);
	} else {
		gf_bs_write_int(bs, 1, 1);
		gf_bs_write_float(bs, FIX2FLT(wheel_pos) );
	}

	gf_bs_align(bs);
	gf_bs_get_content(bs, &buf, &buf_size);
	gf_bs_del(bs);

	memset(&slh, 0, sizeof(GF_SLHeader));
	slh.accessUnitStartFlag = slh.accessUnitEndFlag = 1;
	slh.compositionTimeStampFlag = 1;
	/*note we could use an exact TS but it's not needed: since the input is generated locally
	we want it to be decoded as soon as possible, thus using 0 emulates permanent seeking on 
	InputSensor stream, hence forces input frame resync*/
	slh.compositionTimeStamp = 0;

	/*get all IS Mouse decoders and send frame*/
	i=0;
	while ((cod = (GF_Codec*)gf_list_enum(term->input_streams, &i))) {
		ISPriv *is = (ISPriv *)cod->decio->privateStack;
		if (is->type==IS_Mouse) {
			GF_Channel *ch = (GF_Channel *)gf_list_get(cod->inChannels, 0);
			gf_es_receive_sl_packet(ch->service, ch, buf, buf_size, &slh, GF_OK);
		}
	}
	free(buf);
}

void gf_term_keyboard_input(GF_Terminal *term, u32 key_code, u32 hw_code, Bool isKeyUp)
{
	u32 i;
	GF_BitStream *bs;
	GF_SLHeader slh;
	char *buf;
	X_KeySensor *n;
	u32 buf_size;
	u32 actionKey = 0;
	u32 shiftKeyDown, controlKeyDown, altKeyDown;
	GF_Codec *cod;
	s32 keyPressed, keyReleased, actionKeyPressed, actionKeyReleased;

	if (!term || (!gf_list_count(term->input_streams) && !gf_list_count(term->x3d_sensors)) ) return;

	memset(&slh, 0, sizeof(GF_SLHeader));
	slh.accessUnitStartFlag = slh.accessUnitEndFlag = 1;
	slh.compositionTimeStampFlag = 1;
	/*cf above*/
	slh.compositionTimeStamp = 0;

	bs = gf_bs_new(NULL, 0, GF_BITSTREAM_WRITE);

	shiftKeyDown = controlKeyDown = altKeyDown = 0;
	keyPressed = keyReleased = actionKeyPressed = actionKeyReleased = 0;
	/*key-sensor codes*/
	switch (key_code) {
	case GF_KEY_F1: actionKey = 1; break;
	case GF_KEY_F2: actionKey = 2; break;
	case GF_KEY_F3: actionKey = 3; break;
	case GF_KEY_F4: actionKey = 4; break;
	case GF_KEY_F5: actionKey = 5; break;
	case GF_KEY_F6: actionKey = 6; break;
	case GF_KEY_F7: actionKey = 7; break;
	case GF_KEY_F8: actionKey = 8; break;
	case GF_KEY_F9: actionKey = 9; break;
	case GF_KEY_F10: actionKey = 10; break;
	case GF_KEY_F11: actionKey = 11; break;
	case GF_KEY_F12: actionKey = 12; break;
	case GF_KEY_HOME: actionKey = 13; break;
	case GF_KEY_END: actionKey = 14; break;
	case GF_KEY_PAGEUP: actionKey = 15; break;
	case GF_KEY_PAGEDOWN: actionKey = 16; break;
	case GF_KEY_UP: actionKey = 17; break;
	case GF_KEY_DOWN: actionKey = 18; break;
	case GF_KEY_LEFT: actionKey = 19; break;
	case GF_KEY_RIGHT: actionKey = 20; break;
	case GF_KEY_SHIFT:
		actionKey = 0;
		shiftKeyDown = isKeyUp ? 1 : 2;
		break;
	case GF_KEY_CONTROL:
		actionKey = 0;
		controlKeyDown = isKeyUp ? 1 : 2;
		break;
	case GF_KEY_ALT:
		actionKey = 0;
		altKeyDown = isKeyUp ? 1 : 2;
		break;

	default: actionKey = 0; break;
	}
	if (actionKey) {
		if (isKeyUp) 
			actionKeyReleased = actionKey;
		else 
			actionKeyPressed = actionKey;
	} else {
		/*handle numeric pad*/
		if ((key_code>=GF_KEY_0) && (key_code<=GF_KEY_9) ) {
			key_code = key_code + 0x30 - GF_KEY_0;
		} 
		else 
			key_code = hw_code;

		if (isKeyUp) keyReleased = key_code;
		else keyPressed = key_code;
	}

	gf_bs_write_int(bs, keyPressed ? 1 : 0, 1); 
	if (keyPressed) gf_bs_write_int(bs, keyPressed, 32);
	gf_bs_write_int(bs, keyReleased ? 1 : 0, 1); 
	if (keyReleased) gf_bs_write_int(bs, keyReleased, 32);
	gf_bs_write_int(bs, actionKeyPressed ? 1 : 0, 1); 
	if (actionKeyPressed) gf_bs_write_int(bs, actionKeyPressed, 32);
	gf_bs_write_int(bs, actionKeyReleased ? 1 : 0, 1); 
	if (actionKeyReleased) gf_bs_write_int(bs, actionKeyReleased, 32);
	gf_bs_write_int(bs, shiftKeyDown ? 1 : 0 , 1); 
	if (shiftKeyDown) gf_bs_write_int(bs, shiftKeyDown-1, 1);
	gf_bs_write_int(bs, controlKeyDown ? 1 : 0 , 1); 
	if (controlKeyDown) gf_bs_write_int(bs, controlKeyDown-1, 1);
	gf_bs_write_int(bs, altKeyDown ? 1 : 0 , 1); 
	if (altKeyDown) gf_bs_write_int(bs, altKeyDown, 1);

	gf_bs_align(bs);
	gf_bs_get_content(bs, &buf, &buf_size);
	gf_bs_del(bs);

	/*get all IS keySensor decoders and send frame*/
	i=0;
	while ((cod = (GF_Codec*)gf_list_enum(term->input_streams, &i))) {
		ISPriv *is = (ISPriv *)cod->decio->privateStack;
		if (is->type==IS_KeySensor) {
//			GF_Channel *ch = gf_list_get(cod->inChannels, 0);
//			gf_es_receive_sl_packet(ch->service, ch, buf, buf_size, &slh, GF_OK);

			IS_ProcessData((GF_SceneDecoder*)cod->decio, buf, buf_size, 0, 0, 0);
		}
	}
	free(buf);
	
	i=0;
	while ((n = (X_KeySensor*)gf_list_enum(term->x3d_sensors, &i))) {
		u16 tc[2];
		u32 len;
		char szStr[10];
		const unsigned short *ptr;
		if (gf_node_get_tag((GF_Node*)n) != TAG_X3D_KeySensor) continue;
		if (!n->enabled) return;

		if (keyPressed) {
			if (n->keyPress.buffer) free(n->keyPress.buffer);
			tc[0] = keyPressed; tc[1] = 0;
			ptr = tc;
			len = gf_utf8_wcstombs(szStr, 10, &ptr);
			n->keyPress.buffer = (char*)malloc(sizeof(char) * (len+1));
			memcpy(n->keyPress.buffer, szStr, sizeof(char) * len);
			n->keyPress.buffer[len] = 0;
			gf_node_event_out_str((GF_Node *)n, "keyPress");
		}
		if (keyReleased) {
			if (n->keyRelease.buffer) free(n->keyRelease.buffer);
			tc[0] = keyReleased; tc[1] = 0;
			ptr = tc;
			len = gf_utf8_wcstombs(szStr, 10, &ptr);
			n->keyRelease.buffer = (char*)malloc(sizeof(char) * (len+1));
			memcpy(n->keyRelease.buffer, szStr, sizeof(char) * len);
			n->keyRelease.buffer[len] = 0;
			gf_node_event_out_str((GF_Node *)n, "keyRelease");
		}
		if (actionKeyPressed) {
			n->actionKeyPress = actionKeyPressed;
			gf_node_event_out_str((GF_Node *)n, "actionKeyPress");
		}
		if (actionKeyReleased) {
			n->actionKeyRelease = actionKeyReleased;
			gf_node_event_out_str((GF_Node *)n, "actionKeyRelease");
		}
		if (shiftKeyDown) {
			n->shiftKey = (shiftKeyDown-1) ? 1 : 0;
			gf_node_event_out_str((GF_Node *)n, "shiftKey");
		}
		if (controlKeyDown) {
			n->controlKey = (controlKeyDown-1) ? 1 : 0;
			gf_node_event_out_str((GF_Node *)n, "controlKey");
		}
		if (altKeyDown) {
			n->altKey= (altKeyDown-1) ? 1 : 0;
			gf_node_event_out_str((GF_Node *)n, "altKey");
		}
		if (keyPressed || actionKeyPressed || (shiftKeyDown-1) || (controlKeyDown-1) || (altKeyDown-1)) {
			if (!n->isActive) {
				n->isActive = 1;
				gf_node_event_out_str((GF_Node *)n, "isActive");
			}
		} else if (n->isActive) {
			n->isActive = 0;
			gf_node_event_out_str((GF_Node *)n, "isActive");
		}
	}
}

void gf_term_string_input(GF_Terminal *term, u32 character)
{
	u32 i;
	GF_BitStream *bs;
	GF_SLHeader slh;
	X_StringSensor *n;
	GF_Codec *cod;
	char *buf;
	u32 buf_size;

	if (!character || !term) return;
	if (!gf_list_count(term->input_streams) && !gf_list_count(term->x3d_sensors)) return;

	memset(&slh, 0, sizeof(GF_SLHeader));
	slh.accessUnitStartFlag = slh.accessUnitEndFlag = 1;
	slh.compositionTimeStampFlag = 1;
	/*cf above*/
	slh.compositionTimeStamp = 0;

	/*get all IS StringSensor decoders and send frame*/
	i=0;
	while ((cod = (GF_Codec*)gf_list_enum(term->input_streams, &i))) {
		ISPriv *is = (ISPriv *)cod->decio->privateStack;
		if (is->type==IS_StringSensor) {

			GF_Channel *ch = (GF_Channel *)gf_list_get(cod->inChannels, 0);
			is->enteredText[is->text_len] = character;
			is->text_len += 1;

			/*write empty DDF*/
			bs = gf_bs_new(NULL, 0, GF_BITSTREAM_WRITE);
			gf_bs_write_int(bs, 0, 1);
			gf_bs_write_int(bs, 0, 1);
			gf_bs_align(bs);
			gf_bs_get_content(bs, &buf, &buf_size);
			gf_bs_del(bs);
			
			gf_es_receive_sl_packet(ch->service, ch, buf, buf_size, &slh, GF_OK);
			
			free(buf);
		}
	}


	/*get all X3D StringSensors*/
	i=0;
	while ((n = (X_StringSensor*)gf_list_enum(term->x3d_sensors, &i))) {
		StringSensorStack *st;
		char szStr[5000];
		const unsigned short *ptr;
		u32 len;
		if (gf_node_get_tag((GF_Node*)n) != TAG_X3D_StringSensor) continue;
		if (!n->enabled) continue;

		st = (StringSensorStack *) gf_node_get_private((GF_Node *)n);

		if (character=='\b') {
			if (n->deletionAllowed && st->text_len) {
				st->text_len -= 1;
				st->enteredText[st->text_len] = 0;
				ptr = st->enteredText;
				len = gf_utf8_wcstombs(szStr, 10, &ptr);
				if (n->enteredText.buffer) free(n->enteredText.buffer);
				szStr[len] = 0;
				n->enteredText.buffer = strdup(szStr);
				gf_node_event_out_str((GF_Node *)n, "enteredText");
			}
		} else if (character=='\r') {
			if (n->finalText.buffer) free(n->finalText.buffer);
			n->finalText.buffer = n->enteredText.buffer;
			n->enteredText.buffer = strdup("");
			st->text_len = 0;
			gf_node_event_out_str((GF_Node *)n, "enteredText");
			gf_node_event_out_str((GF_Node *)n, "finalText");
		} else {
			st->enteredText[st->text_len] = character;
			st->text_len += 1;
			st->enteredText[st->text_len] = 0;
			ptr = st->enteredText;
			len = gf_utf8_wcstombs(szStr, 10, &ptr);
			if (n->enteredText.buffer) free(n->enteredText.buffer);
			szStr[len] = 0;
			n->enteredText.buffer = strdup(szStr);
			gf_node_event_out_str((GF_Node *)n, "enteredText");
		}
	}
}

void DestroyKeySensor(GF_Node *node, void *rs, Bool is_destroy)
{
	if (is_destroy) {
		GF_Terminal *term = (GF_Terminal *) gf_node_get_private(node);
		gf_list_del_item(term->x3d_sensors, node);
	}
}
void InitKeySensor(GF_InlineScene *is, GF_Node *node)
{
	gf_node_set_private(node, is->root_od->term);
	gf_node_set_callback_function(node, DestroyKeySensor);
	gf_list_add(is->root_od->term->x3d_sensors, node);
}

void DestroyStringSensor(GF_Node *node, void *rs, Bool is_destroy)
{
	if (is_destroy) {
		StringSensorStack *st = (StringSensorStack *) gf_node_get_private(node);
		gf_list_del_item(st->term->x3d_sensors, node);
		free(st);
	}
}
void InitStringSensor(GF_InlineScene *is, GF_Node *node)
{
	StringSensorStack*st;
	GF_SAFEALLOC(st, StringSensorStack)
	st->term = is->root_od->term;
	gf_node_set_private(node, st);
	gf_node_set_callback_function(node, DestroyStringSensor);
	gf_list_add(is->root_od->term->x3d_sensors, node);
}

#if GPAC_HTK_DEMO
u32 RunHTKDec(void *par)
{
	GF_BitStream *bs;
	char *szWord;
	s32 word_index;
	u32 len, val, i;
	Float word_score;
	GF_SLHeader slh;
	GF_Codec *cod;
	unsigned char *buf;
	u32 buf_size;


	ISPriv *is_dec = (ISPriv *)par;
//	while (is_dec->htk_running)

	HTK_DoDetection();
	szWord = HTK_GetWord();
	word_index = HTK_GetWordIndex();
	word_score = HTK_GetWordScore();

	bs = gf_bs_new(NULL, 0, GF_BITSTREAM_WRITE);
	
	/*HTK sensor buffer format: SFString - SFInt32 - SFFloat*/
	gf_bs_write_int(bs, 1, 1); 
	len = strlen(szWord);
	val = gf_get_bit_size(len);
	gf_bs_write_int(bs, val, 5);
	gf_bs_write_int(bs, len, val);
	for (i=0; i<len; i++) gf_bs_write_int(bs, szWord[i], 8);

	gf_bs_write_int(bs, 1, 1); 
	gf_bs_write_int(bs, word_index, 32);
	gf_bs_write_int(bs, 1, 1); 
	gf_bs_write_float(bs, word_score);

	gf_bs_align(bs);
	gf_bs_get_content(bs, &buf, &buf_size);
	gf_bs_del(bs);

	memset(&slh, 0, sizeof(GF_SLHeader));
	slh.accessUnitStartFlag = slh.accessUnitEndFlag = 1;
	slh.compositionTimeStamp = 0;

	/*get all IS keySensor decoders and send frame*/
	i=0; 
	while ((cod = gf_list_enum(is_dec->scene->root_od->term->input_streams, &i))) {
		ISPriv *is = cod->decio->privateStack;
		if (is != is_dec) continue;
		if (is->type==IS_HTKSensor) {
			GF_Channel *ch = gf_list_get(cod->inChannels, 0);
			gf_es_receive_sl_packet(ch->service, ch, buf, buf_size, &slh, GF_OK);
		}
	}
	free(buf);

	is_dec->htk_running = 0;
	return 0;
}

void StartHTK(ISPriv *is_dec)
{
	u32 j;
	Bool run;
	ISStack *st;
	run = 0;
	j=0;
	while ((st = gf_list_enum(is_dec->is_nodes, &j))) {
		if (st->is->enabled) {
			run = 1;
			break;
		}
	}
	if (is_dec->htk_running && run) return;
	if (!is_dec->htk_running && !run) return;
	
	is_dec->htk_running = run;
	if (run) {
		HTK_SetDictionary(is_dec->szHTKPath);
		gf_th_run(is_dec->th, RunHTKDec, is_dec);
	}
}
#endif