memory_decoder.c

一个用于智能手机的多媒体库适合S60 WinCE的跨平台开发库

/*
 *			GPAC - Multimedia Framework C SDK
 *
 *			Copyright (c) Jean Le Feuvre 2000-2005
 *					All rights reserved
 *
 *  This file is part of GPAC / BIFS codec 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/bifs_dev.h>
/*for scene replace tricks*/
#include <gpac/internal/scenegraph_dev.h>
#include "quant.h"

GF_Err ParseMFFieldList(GF_BifsDecoder *codec, GF_BitStream *bs, GF_Node *node, GF_FieldInfo *field);
GF_Err ParseMFFieldVec(GF_BifsDecoder *codec, GF_BitStream *bs, GF_Node *node, GF_FieldInfo *field);


static void BM_SetCommandNode(GF_Command *com, GF_Node *node)
{
	com->node = node;
	gf_node_register(node, NULL);
}

static GF_Err BM_ParseMultipleIndexedReplace(GF_BifsDecoder *codec, GF_BitStream *bs, GF_List *com_list)
{
	u32 ID, ind, field_ind, NumBits, lenpos, lennum, count;
	GF_Node *node;
	GF_Err e;
	GF_Command *com;
	GF_CommandField *inf;
	GF_FieldInfo field;
	
	ID = 1 + gf_bs_read_int(bs, codec->info->config.NodeIDBits);
	node = gf_sg_find_node(codec->current_graph, ID);
	if (!node) return GF_NON_COMPLIANT_BITSTREAM;
	NumBits = gf_get_bit_size(gf_node_get_num_fields_in_mode(node, GF_SG_FIELD_CODING_IN)-1);
	ind = gf_bs_read_int(bs, NumBits);
	e = gf_bifs_get_field_index(node, ind, GF_SG_FIELD_CODING_IN, &field_ind);
	if (e) return e;
	e = gf_node_get_field(node, field_ind, &field);
	if (gf_sg_vrml_is_sf_field(field.fieldType)) return GF_NON_COMPLIANT_BITSTREAM;

	lenpos = gf_bs_read_int(bs, 5);
	lennum = gf_bs_read_int(bs, 5);
	count = gf_bs_read_int(bs, lennum);
	
	com = gf_sg_command_new(codec->current_graph, GF_SG_MULTIPLE_INDEXED_REPLACE);
	BM_SetCommandNode(com, node);
	field.fieldType = gf_sg_vrml_get_sf_type(field.fieldType);

	while (count) {
		inf = gf_sg_command_field_new(com);
		inf->pos = gf_bs_read_int(bs, lenpos);
		inf->fieldIndex = field.fieldIndex;
		inf->fieldType = field.fieldType;
		
		if (field.fieldType==GF_SG_VRML_SFNODE) {
			inf->new_node = gf_bifs_dec_node(codec, bs, field.NDTtype);
			if (codec->LastError) goto err;
			inf->field_ptr = &inf->new_node;
			gf_node_register(inf->new_node, node);
		} else {
			field.far_ptr = inf->field_ptr = gf_sg_vrml_field_pointer_new(inf->fieldType);
			e = gf_bifs_dec_sf_field(codec, bs, node, &field);
			if (e) goto err;
		}
		count--;
	}
err:
	if (e) gf_sg_command_del(com);
	else gf_list_add(com_list, com);
	return e;
}

static GF_Err BM_ParseMultipleReplace(GF_BifsDecoder *codec, GF_BitStream *bs, GF_List *com_list)
{
	u32 i, numFields, index, flag, nbBits, field_ref, fieldind;
	GF_Err e;
	GF_FieldInfo field;
	u32 NodeID;
	GF_Node *node;
	GF_Command *com;
	GF_CommandField *inf;

	NodeID = 1 + gf_bs_read_int(bs, codec->info->config.NodeIDBits);
	node = gf_sg_find_node(codec->current_graph, NodeID);
	if (!node) return GF_NON_COMPLIANT_BITSTREAM;
	
	e = GF_OK;
	com = gf_sg_command_new(codec->current_graph, GF_SG_MULTIPLE_REPLACE);
	BM_SetCommandNode(com, node);
	flag = gf_bs_read_int(bs, 1);
	if (flag) {
		numFields = gf_node_get_num_fields_in_mode(node, GF_SG_FIELD_CODING_DEF);
		for (i=0; i<numFields; i++) {
			flag = gf_bs_read_int(bs, 1);
			if (!flag) continue;
			gf_bifs_get_field_index(node, i, GF_SG_FIELD_CODING_DEF, &index);
			e = gf_node_get_field(node, index, &field);
			if (e) goto exit;
			inf = gf_sg_command_field_new(com);
			inf->fieldType = field.fieldType;
			inf->fieldIndex = field.fieldIndex;
			if (inf->fieldType==GF_SG_VRML_SFNODE) {
				field.far_ptr = inf->field_ptr = &inf->new_node;
			} else if (inf->fieldType==GF_SG_VRML_MFNODE) {
				field.far_ptr = inf->field_ptr = &inf->node_list;
			} else {
				field.far_ptr = inf->field_ptr = gf_sg_vrml_field_pointer_new(inf->fieldType);
			}
			e = gf_bifs_dec_field(codec, bs, node, &field);
			if (e) goto exit;
		}
	} else {
		flag = gf_bs_read_int(bs, 1);
		nbBits = gf_get_bit_size(gf_node_get_num_fields_in_mode(node, GF_SG_FIELD_CODING_DEF)-1);
		while (!flag) {
			field_ref = gf_bs_read_int(bs, nbBits);
			e = gf_bifs_get_field_index(node, field_ref, GF_SG_FIELD_CODING_DEF, &fieldind);
			if (e) goto exit;
			e = gf_node_get_field(node, fieldind, &field);
			if (e) goto exit;
			inf = gf_sg_command_field_new(com);
			inf->fieldType = field.fieldType;
			inf->fieldIndex = field.fieldIndex;
			if (inf->fieldType==GF_SG_VRML_SFNODE) {
				field.far_ptr = inf->field_ptr = &inf->new_node;
			} else if (inf->fieldType==GF_SG_VRML_MFNODE) {
				field.far_ptr = inf->field_ptr = &inf->node_list;
			} else {
				field.far_ptr = inf->field_ptr = gf_sg_vrml_field_pointer_new(inf->fieldType);
			}
			e = gf_bifs_dec_field(codec, bs, node, &field);
			if (e) goto exit;
			flag = gf_bs_read_int(bs, 1);
		}
	}

	
exit:
	if (e) gf_sg_command_del(com);
	else gf_list_add(com_list, com);
	return e;
}

static GF_Err BM_ParseGlobalQuantizer(GF_BifsDecoder *codec, GF_BitStream *bs, GF_List *com_list)
{
	GF_Node *node;
	GF_Command *com;
	GF_CommandField *inf;
	node = gf_bifs_dec_node(codec, bs, NDT_SFWorldNode);

	/*reset global QP*/
	if (codec->GlobalQP) gf_node_unregister((GF_Node *) codec->GlobalQP, NULL);
	codec->GlobalQP = codec->ActiveQP = NULL;
	
	if (node && (gf_node_get_tag(node) != TAG_MPEG4_QuantizationParameter)) {
		gf_node_unregister(node, NULL);
		return GF_NON_COMPLIANT_BITSTREAM;
	}

	/*register global QP*/
	codec->GlobalQP = codec->ActiveQP = (M_QuantizationParameter *) node;
	codec->GlobalQP->isLocal = 0;
	if (node) {
		/*register TWICE: once for the command, and for the codec*/
		node->sgprivate->num_instances = 2;
	}
	com = gf_sg_command_new(codec->current_graph, GF_SG_GLOBAL_QUANTIZER);
	inf = gf_sg_command_field_new(com);
	inf->new_node = node;
	inf->field_ptr = &inf->new_node;
	inf->fieldType = GF_SG_VRML_SFNODE;
	gf_list_add(com_list, com);
	return GF_OK;
}

static GF_Err BM_ParseProtoDelete(GF_BifsDecoder *codec, GF_BitStream *bs, GF_List *com_list)
{
	u32 flag, count;
	GF_Command *com = gf_sg_command_new(codec->current_graph, GF_SG_PROTO_DELETE);
	flag = gf_bs_read_int(bs, 1);
	if (flag) {
		count = 0;
		flag = gf_bs_read_int(bs, 1);
		while (flag) {
			com->del_proto_list = (u32*)realloc(com->del_proto_list, sizeof(u32) * (com->del_proto_list_size+1));
			com->del_proto_list[count] = gf_bs_read_int(bs, codec->info->config.ProtoIDBits);
			com->del_proto_list_size++;
			flag = gf_bs_read_int(bs, 1);
		}
	} else {
		flag = gf_bs_read_int(bs, 5);
		com->del_proto_list_size = gf_bs_read_int(bs, flag);
		com->del_proto_list = (u32*)realloc(com->del_proto_list, sizeof(u32) * (com->del_proto_list_size));
		flag = 0;
		while (flag<com->del_proto_list_size) {
			com->del_proto_list[flag] = gf_bs_read_int(bs, codec->info->config.ProtoIDBits);
			flag++;
		}
	}
	gf_list_add(com_list, com);
	return GF_OK;
}

static GF_Err BM_ParseExtendedUpdates(GF_BifsDecoder *codec, GF_BitStream *bs, GF_List *com_list)
{
	u32 type = gf_bs_read_int(bs, 8);
	GF_Err e;

	switch (type) {
	case 0:
	{
		GF_Command *com = gf_sg_command_new(codec->current_graph, GF_SG_PROTO_INSERT);
		e = gf_bifs_dec_proto_list(codec, bs, com->new_proto_list);
		if (e) gf_sg_command_del(com);
		else gf_list_add(com_list, com);
	}
		return e;
	case 1:
		return BM_ParseProtoDelete(codec, bs, com_list);
	case 2:
	{
		GF_Command *com = gf_sg_command_new(codec->current_graph, GF_SG_PROTO_DELETE_ALL);
		return gf_list_add(com_list, com);
	}
	case 3:
		return BM_ParseMultipleIndexedReplace(codec, bs, com_list);
	case 4:
		return BM_ParseMultipleReplace(codec, bs, com_list);
	case 5:
		return BM_ParseGlobalQuantizer(codec, bs, com_list);
	case 6:
	{
		GF_Command *com;
		u32 ID = 1 + gf_bs_read_int(bs, codec->info->config.NodeIDBits);
		GF_Node *n = gf_sg_find_node(codec->current_graph, ID);
		if (!n) return GF_OK;
		com = gf_sg_command_new(codec->current_graph, GF_SG_NODE_DELETE_EX);
		BM_SetCommandNode(com, n);
		gf_list_add(com_list, com);
	}
		return GF_OK;
	default:
		return GF_BIFS_UNKNOWN_VERSION;
	}
}

/*inserts a node in a container (node.children)*/
GF_Err BM_ParseNodeInsert(GF_BifsDecoder *codec, GF_BitStream *bs, GF_List *com_list)
{
	u32 NodeID, NDT;
	GF_Command *com;
	GF_CommandField *inf;
	s32 type, pos;
	GF_Node *node, *def;

	NodeID = 1 + gf_bs_read_int(bs, codec->info->config.NodeIDBits);
	def = gf_sg_find_node(codec->current_graph, NodeID);
	if (!def) return GF_NON_COMPLIANT_BITSTREAM;
	NDT = gf_bifs_get_child_table(def);
	if (!NDT) return GF_NON_COMPLIANT_BITSTREAM;

	type = gf_bs_read_int(bs, 2);
	switch (type) {
	case 0:
		pos = gf_bs_read_int(bs, 8);
		break;
	case 2:
		pos = 0;
		break;
	case 3:
		/*-1 means append*/
		pos = -1;
		break;
	default:
		return GF_NON_COMPLIANT_BITSTREAM;
	}
	node = gf_bifs_dec_node(codec, bs, NDT);
	if (!codec->LastError) {
		com = gf_sg_command_new(codec->current_graph, GF_SG_NODE_INSERT);
		BM_SetCommandNode(com, def);
		inf = gf_sg_command_field_new(com);
		inf->pos = pos;
		inf->new_node = node;
		inf->field_ptr = &inf->new_node;
		inf->fieldType = GF_SG_VRML_SFNODE;
		gf_list_add(com_list, com);
		/*register*/
		gf_node_register(node, def);
	}
	return codec->LastError;
}

/*NB This can insert a node as well (but usually not in the .children field)*/
GF_Err BM_ParseIndexInsert(GF_BifsDecoder *codec, GF_BitStream *bs, GF_List *com_list)
{
	GF_Err e;
	u32 NodeID;
	u32 NumBits, ind, field_ind;
	u8 type;
	GF_Command *com;
	GF_CommandField *inf;
	s32 pos;
	GF_Node *def, *node;
	GF_FieldInfo field, sffield;

	NodeID = 1 + gf_bs_read_int(bs, codec->info->config.NodeIDBits);
	def = gf_sg_find_node(codec->current_graph, NodeID);
	if (!def) return GF_NON_COMPLIANT_BITSTREAM;
	/*index insertion uses IN mode for field index*/
	NumBits = gf_get_bit_size(gf_node_get_num_fields_in_mode(def, GF_SG_FIELD_CODING_IN)-1);
	ind = gf_bs_read_int(bs, NumBits);

	e = gf_bifs_get_field_index(def, ind, GF_SG_FIELD_CODING_IN, &field_ind);
	if (e) return e;

	type = gf_bs_read_int(bs, 2);
	switch (type) {
	case 0:
		pos = gf_bs_read_int(bs, 16);
		break;
	case 2:
		pos = 0;
		break;
	case 3:
		pos = -1;
		break;
	default:
		return GF_NON_COMPLIANT_BITSTREAM;
	}

	e = gf_node_get_field(def, field_ind, &field);
	if (e) return e;
	if (gf_sg_vrml_is_sf_field(field.fieldType)) return GF_NON_COMPLIANT_BITSTREAM;

	memcpy(&sffield, &field, sizeof(GF_FieldInfo));
	sffield.fieldType = gf_sg_vrml_get_sf_type(field.fieldType);

	/*rescale the MFField and parse the SFField*/
	if (field.fieldType==GF_SG_VRML_MFNODE) {
		node = gf_bifs_dec_node(codec, bs, field.NDTtype);
		if (!codec->LastError) {
			com = gf_sg_command_new(codec->current_graph, GF_SG_INDEXED_INSERT);
			BM_SetCommandNode(com, def);
			inf = gf_sg_command_field_new(com);
			inf->pos = pos;
			inf->fieldIndex = field_ind;
			inf->fieldType = sffield.fieldType;
			inf->new_node = node;
			inf->field_ptr = &inf->new_node;
			gf_list_add(com_list, com);
			/*register*/
			gf_node_register(node, def);
		}
	} else {
		com = gf_sg_command_new(codec->current_graph, GF_SG_INDEXED_INSERT);
		BM_SetCommandNode(com, def);
		inf = gf_sg_command_field_new(com);
		inf->pos = pos;
		inf->fieldIndex = field_ind;
		inf->fieldType = sffield.fieldType;
		sffield.far_ptr = inf->field_ptr = gf_sg_vrml_field_pointer_new(sffield.fieldType);
		codec->LastError = gf_bifs_dec_sf_field(codec, bs, def, &sffield);
		gf_list_add(com_list, com);
	}
	return codec->LastError;
}


GF_Err BM_ParseRouteInsert(GF_BifsDecoder *codec, GF_BitStream *bs, GF_List *com_list)
{
	GF_Err e;
	u8 flag;
	GF_Command *com;
	GF_Node *InNode, *OutNode;
	u32 RouteID, outField, inField, numBits, ind, node_id;
	char name[1000];

	RouteID = 0;

	flag = gf_bs_read_int(bs, 1);
	/*def'ed route*/
	if (flag) {
		RouteID = 1 + gf_bs_read_int(bs, codec->info->config.RouteIDBits);
		if (codec->info->UseName) gf_bifs_dec_name(bs, name);
	}
	/*origin*/
	node_id = 1 + gf_bs_read_int(bs, codec->info->config.NodeIDBits);
	OutNode = gf_sg_find_node(codec->current_graph, node_id);
	if (!OutNode) return GF_SG_UNKNOWN_NODE;

	numBits = gf_node_get_num_fields_in_mode(OutNode, GF_SG_FIELD_CODING_OUT) - 1;
	numBits = gf_get_bit_size(numBits);
	ind = gf_bs_read_int(bs, numBits);
	e = gf_bifs_get_field_index(OutNode, ind, GF_SG_FIELD_CODING_OUT, &outField);

	/*target*/
	node_id = 1 + gf_bs_read_int(bs, codec->info->config.NodeIDBits);
	InNode = gf_sg_find_node(codec->current_graph, node_id);
	if (!InNode) return GF_SG_UNKNOWN_NODE;

	numBits = gf_node_get_num_fields_in_mode(InNode, GF_SG_FIELD_CODING_IN) - 1;
	numBits = gf_get_bit_size(numBits);
	ind = gf_bs_read_int(bs, numBits);
	e = gf_bifs_get_field_index(InNode, ind, GF_SG_FIELD_CODING_IN, &inField);
	if (e) return e;

	com = gf_sg_command_new(codec->current_graph, GF_SG_ROUTE_INSERT);
	com->RouteID = RouteID;
	if (codec->info->UseName) com->def_name = strdup( name);
	com->fromNodeID = gf_node_get_id(OutNode);
	com->fromFieldIndex = outField;
	com->toNodeID = gf_node_get_id(InNode);
	com->toFieldIndex = inField;
	gf_list_add(com_list, com);
	return codec->LastError;
}


GF_Err BM_ParseInsert(GF_BifsDecoder *codec, GF_BitStream *bs, GF_List *com_list)
{
	u8 type;

	type = gf_bs_read_int(bs, 2);
	switch (type) {
	case 0:
		return BM_ParseNodeInsert(codec, bs, com_list);
	case 1:
		return BM_ParseExtendedUpdates(codec, bs, com_list);
	case 2:
		return BM_ParseIndexInsert(codec, bs, com_list);
	case 3:
		return BM_ParseRouteInsert(codec, bs, com_list);
	default:
		return GF_NON_COMPLIANT_BITSTREAM;
	}