10 files changed, 830 insertions, 0 deletions

diff --git a/lib/libesg/encapsulation/Makefile b/lib/libesg/encapsulation/Makefile
new file mode 100644
index 0000000..2f222ed
--- /dev/null
+++ b/lib/libesg/encapsulation/Makefile
@@ -0,0 +1,28 @@
+# Makefile for linuxtv.org dvb-apps/lib/libesg/encapsulation
+
+.PHONY: sub-error-encapsulation
+
+sub-error-encapsulation:
+	$(error You can't use this makefile directly.)
+
+ifneq ($(lib_name),)
+
+objects += encapsulation/container.o \
+           encapsulation/fragment_management_information.o \
+           encapsulation/data_repository.o \
+           encapsulation/string_repository.o
+
+sub-install += encapsulation
+
+else
+
+includes = container.h \
+           fragment_management_information.h \
+           data_repository.h \
+           string_repository.h
+
+include ../../../Make.rules
+
+lib_name = libesg/encapsulation
+
+endif
diff --git a/lib/libesg/encapsulation/auxiliary_data.h b/lib/libesg/encapsulation/auxiliary_data.h
new file mode 100644
index 0000000..e05b241
--- /dev/null
+++ b/lib/libesg/encapsulation/auxiliary_data.h
@@ -0,0 +1,62 @@
+/*
+ * ESG parser
+ *
+ * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef _ESG_ENCAPSULATION_AUXILIARY_DATA_H
+#define _ESG_ENCAPSULATION_AUXILIARY_DATA_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <stdint.h>
+
+/**
+ * esg_any_attribute structure.
+ */
+struct esg_any_attribute {
+	uint8_t version_id;
+	uint8_t *extension;
+
+	struct esg_any_attribure *_next;
+};
+
+/**
+ * esg_binary_header structure.
+ */
+struct esg_binary_header {
+	uint16_t encoding_metadatauri_mimetype;
+	struct esg_any_attribute *any_attribute_list;
+};
+
+/**
+ * esg_encapsulated_aux_data struct.
+ */
+struct esg_encapsulated_aux_data {
+	struct esg_binary_header *binary_header;
+	uint32_t aux_data_length;
+	uint8_t aux_data;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/lib/libesg/encapsulation/container.c b/lib/libesg/encapsulation/container.c
new file mode 100644
index 0000000..15b17bf
--- /dev/null
+++ b/lib/libesg/encapsulation/container.c
@@ -0,0 +1,206 @@
+/*
+ * ESG parser
+ *
+ * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <libesg/encapsulation/container.h>
+#include <libesg/encapsulation/fragment_management_information.h>
+#include <libesg/encapsulation/data_repository.h>
+#include <libesg/encapsulation/string_repository.h>
+#include <libesg/representation/init_message.h>
+#include <libesg/transport/session_partition_declaration.h>
+
+struct esg_container *esg_container_decode(uint8_t *buffer, uint32_t size) {
+	uint32_t pos;
+	struct esg_container *container;
+	struct esg_container_structure *structure;
+	struct esg_container_structure *last_structure;
+	uint8_t structure_index;
+
+	if ((buffer == NULL) || (size <= 1)) {
+		return NULL;
+	}
+
+	pos = 0;
+
+	container = (struct esg_container *) malloc(sizeof(struct esg_container));
+	memset(container, 0, sizeof(struct esg_container));
+
+	// Container header
+	container->header = (struct esg_container_header *) malloc(sizeof(struct esg_container_header));
+	memset(container->header, 0, sizeof(struct esg_container_header));
+
+	container->header->num_structures = buffer[pos];
+	pos += 1;
+
+	if (size < pos + (container->header->num_structures * 8)) {
+		esg_container_free(container);
+		return NULL;
+	}
+
+	last_structure = NULL;
+	for (structure_index = 0; structure_index < container->header->num_structures; structure_index++) {
+		structure = (struct esg_container_structure *) malloc(sizeof(struct esg_container_structure));
+		memset(structure, 0, sizeof(struct esg_container_structure));
+		structure->_next = NULL;
+
+		if (last_structure == NULL) {
+			container->header->structure_list = structure;
+		} else {
+			last_structure->_next = structure;
+		}
+		last_structure = structure;
+
+		structure->type = buffer[pos];
+		pos += 1;
+
+		structure->id = buffer[pos];
+		pos += 1;
+
+		structure->ptr = (buffer[pos] << 16) | (buffer[pos+1] << 8) | buffer[pos+2];
+		pos += 3;
+
+		structure->length = (buffer[pos] << 16) | (buffer[pos+1] << 8) | buffer[pos+2];
+		pos += 3;
+
+		if (size < (structure->ptr + structure->length)) {
+			esg_container_free(container);
+			return NULL;
+		}
+
+		// Decode structure
+		switch (structure->type) {
+			case 0x01: {
+				switch (structure->id) {
+					case 0x00: {
+						structure->data = (void *) esg_encapsulation_structure_decode(buffer + structure->ptr, structure->length);
+						break;
+					}
+					default: {
+						esg_container_free(container);
+						return NULL;
+					}
+				}
+				break;
+			}
+			case 0x02: {
+				switch (structure->id) {
+					case 0x00: {
+						structure->data = (void *) esg_string_repository_decode(buffer + structure->ptr, structure->length);
+						break;
+					}
+					default: {
+						esg_container_free(container);
+						return NULL;
+					}
+				}
+				break;
+			}
+			case 0x03: {
+				//TODO
+				break;
+			}
+			case 0x04: {
+				//TODO
+				break;
+			}
+			case 0x05: {
+				//TODO
+				break;
+			}
+			case 0xE0: {
+				switch (structure->id) {
+					case 0x00: {
+						structure->data = (void *) esg_data_repository_decode(buffer + structure->ptr, structure->length);
+						break;
+					}
+					default: {
+						esg_container_free(container);
+						return NULL;
+					}
+				}
+				break;
+			}
+			case 0xE1: {
+				switch (structure->id) {
+					case 0xFF: {
+						structure->data = (void *) esg_session_partition_declaration_decode(buffer + structure->ptr, structure->length);
+						break;
+					}
+					default: {
+						esg_container_free(container);
+						return NULL;
+					}
+				}
+				break;
+			}
+			case 0xE2: {
+				switch (structure->id) {
+					case 0x00: {
+						structure->data = (void *) esg_init_message_decode(buffer + structure->ptr, structure->length);
+						break;
+					}
+					default: {
+						esg_container_free(container);
+						return NULL;
+					}
+				}
+				break;
+			}
+			default: {
+				esg_container_free(container);
+				return NULL;
+			}
+		}
+	}
+
+	// Container structure body
+	container->structure_body_ptr = pos;
+	container->structure_body_length = size - pos;
+	container->structure_body = (uint8_t *) malloc(size - pos);
+	memcpy(container->structure_body, buffer + pos, size - pos);
+
+	return container;
+}
+
+void esg_container_free(struct esg_container *container) {
+	struct esg_container_structure *structure;
+	struct esg_container_structure *next_structure;
+
+	if (container == NULL) {
+		return;
+    }
+
+	if (container->header) {
+		for(structure = container->header->structure_list; structure; structure = next_structure) {
+			next_structure = structure->_next;
+			free(structure);
+		}
+
+		free(container->header);
+	}
+
+	if (container->structure_body) {
+		free(container->structure_body);
+	}
+
+	free(container);
+}
diff --git a/lib/libesg/encapsulation/container.h b/lib/libesg/encapsulation/container.h
new file mode 100644
index 0000000..dc54ef2
--- /dev/null
+++ b/lib/libesg/encapsulation/container.h
@@ -0,0 +1,94 @@
+/*
+ * ESG parser
+ *
+ * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef _ESG_ENCAPSULATION_CONTAINER_H
+#define _ESG_ENCAPSULATION_CONTAINER_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <stdint.h>
+
+/**
+ * esg_container_structure structure.
+ */
+struct esg_container_structure {
+	uint8_t type;
+	uint8_t id;
+	uint32_t ptr;
+	uint32_t length;
+
+	void *data;
+
+	struct esg_container_structure *_next;
+};
+
+/**
+ * esg_container_header structure.
+ */
+struct esg_container_header {
+	uint8_t num_structures;
+	struct esg_container_structure *structure_list;
+};
+
+/**
+ * esg_container structure
+ */
+struct esg_container {
+	struct esg_container_header *header;
+	uint32_t structure_body_ptr;
+	uint32_t structure_body_length;
+	uint8_t *structure_body;
+};
+
+/**
+ * Process an esg_container.
+ *
+ * @param buffer Binary buffer to decode.
+ * @param size Binary buffer size.
+ * @return Pointer to an esg_container structure, or NULL on error.
+ */
+extern struct esg_container *esg_container_decode(uint8_t *buffer, uint32_t size);
+
+/**
+ * Free an esg_container.
+ *
+ * @param container Pointer to an esg_container structure.
+ */
+extern void esg_container_free(struct esg_container *container);
+
+/**
+ * Convenience iterator for structure_list field of an esg_container_header.
+ *
+ * @param container The esg_container_header pointer.
+ * @param structure Variable holding a pointer to the current esg_container_structure.
+ */
+#define esg_container_header_structure_list_for_each(header, structure) \
+	for ((structure) = (header)->structure_list; \
+	     (structure); \
+	     (structure) = (structure)->_next)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/lib/libesg/encapsulation/data_repository.c b/lib/libesg/encapsulation/data_repository.c
new file mode 100644
index 0000000..629e5ea
--- /dev/null
+++ b/lib/libesg/encapsulation/data_repository.c
@@ -0,0 +1,53 @@
+/*
+ * ESG parser
+ *
+ * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <libesg/encapsulation/data_repository.h>
+
+struct esg_data_repository *esg_data_repository_decode(uint8_t *buffer, uint32_t size) {
+	struct esg_data_repository *data_repository;
+
+	if ((buffer == NULL) || (size <= 0)) {
+		return NULL;
+	}
+
+	data_repository = (struct esg_data_repository *) malloc(sizeof(struct esg_data_repository));
+	memset(data_repository, 0, sizeof(struct esg_data_repository));
+
+	data_repository->length = size;
+	data_repository->data = (uint8_t *) malloc(size);
+	memcpy(data_repository->data, buffer, size);
+
+	return data_repository;
+}
+
+void esg_data_repository_free(struct esg_data_repository *data_repository) {
+	if (data_repository == NULL) {
+		return;
+	}
+
+	if (data_repository->data) {
+		free(data_repository->data);
+	}
+
+	free(data_repository);
+}
diff --git a/lib/libesg/encapsulation/data_repository.h b/lib/libesg/encapsulation/data_repository.h
new file mode 100644
index 0000000..4c691cf
--- /dev/null
+++ b/lib/libesg/encapsulation/data_repository.h
@@ -0,0 +1,59 @@
+/*
+ * ESG parser
+ *
+ * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef _ESG_ENCAPSULATION_DATA_REPOSITORY_H
+#define _ESG_ENCAPSULATION_DATA_REPOSITORY_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <stdint.h>
+
+/**
+ * esg_data_repository structure.
+ */
+struct esg_data_repository {
+	uint32_t length;
+	uint8_t *data;
+};
+
+/**
+ * Process an esg_data_repository.
+ *
+ * @param buffer Binary buffer to decode.
+ * @param size Binary buffer size.
+ * @return Pointer to an esg_data_repository structure, or NULL on error.
+ */
+extern struct esg_data_repository *esg_data_repository_decode(uint8_t *buffer, uint32_t size);
+
+/**
+ * Free an esg_data_repository.
+ *
+ * @param data_repository Pointer to an esg_data_repository structure.
+ */
+extern void esg_data_repository_free(struct esg_data_repository *data_repository);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/lib/libesg/encapsulation/fragment_management_information.c b/lib/libesg/encapsulation/fragment_management_information.c
new file mode 100644
index 0000000..b08265d
--- /dev/null
+++ b/lib/libesg/encapsulation/fragment_management_information.c
@@ -0,0 +1,118 @@
+/*
+ * ESG parser
+ *
+ * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <libesg/encapsulation/fragment_management_information.h>
+
+struct esg_encapsulation_structure *esg_encapsulation_structure_decode(uint8_t *buffer, uint32_t size) {
+	uint32_t pos;
+	struct esg_encapsulation_structure *structure;
+	struct esg_encapsulation_entry *entry;
+	struct esg_encapsulation_entry *last_entry;
+
+	if ((buffer == NULL) || (size <= 2)) {
+		return NULL;
+	}
+
+	pos = 0;
+
+	structure = (struct esg_encapsulation_structure *) malloc(sizeof(struct esg_encapsulation_structure));
+	memset(structure, 0, sizeof(struct esg_encapsulation_structure));
+	structure->entry_list = NULL;
+
+	// Encapsulation header
+	structure->header = (struct esg_encapsulation_header *) malloc(sizeof(struct esg_encapsulation_header));
+	// buffer[pos] reserved
+	structure->header->fragment_reference_format = buffer[pos+1];
+	pos += 2;
+
+	// Encapsulation entry list
+	last_entry = NULL;
+	while (size > pos) {
+		entry = (struct esg_encapsulation_entry *) malloc(sizeof(struct esg_encapsulation_entry));
+		memset(entry, 0, sizeof(struct esg_encapsulation_entry));
+		entry->_next = NULL;
+
+		if (last_entry == NULL) {
+			structure->entry_list = entry;
+		} else {
+			last_entry->_next = entry;
+		}
+		last_entry = entry;
+
+		// Fragment reference
+		switch (structure->header->fragment_reference_format) {
+			case 0x21: {
+				entry->fragment_reference = (struct esg_fragment_reference *) malloc(sizeof(struct esg_fragment_reference));
+				memset(entry->fragment_reference, 0, sizeof(struct esg_fragment_reference));
+
+				entry->fragment_reference->fragment_type = buffer[pos];
+				pos += 1;
+
+				entry->fragment_reference->data_repository_offset = (buffer[pos] << 16) | (buffer[pos+1] << 8) | buffer[pos+2];
+				pos += 3;
+
+				break;
+			}
+			default: {
+				esg_encapsulation_structure_free(structure);
+				return NULL;
+			}
+		}
+
+		// Fragment version & id
+		entry->fragment_version = buffer[pos];
+		pos += 1;
+
+		entry->fragment_id = (buffer[pos] << 16) | (buffer[pos+1] << 8) | buffer[pos+2];
+		pos += 3;
+	}
+
+	return structure;
+}
+
+void esg_encapsulation_structure_free(struct esg_encapsulation_structure *structure) {
+	struct esg_encapsulation_entry *entry;
+	struct esg_encapsulation_entry *next_entry;
+
+	if (structure == NULL) {
+		return;
+    }
+
+	if (structure->header) {
+		free(structure->header);
+	}
+
+	if (structure->entry_list) {
+		for(entry = structure->entry_list; entry; entry = next_entry) {
+			next_entry = entry->_next;
+			if (entry->fragment_reference) {
+				free(entry->fragment_reference);
+			}
+			free(entry);
+		}
+
+		free(structure->entry_list);
+	}
+
+	free(structure);
+}
diff --git a/lib/libesg/encapsulation/fragment_management_information.h b/lib/libesg/encapsulation/fragment_management_information.h
new file mode 100644
index 0000000..04050b5
--- /dev/null
+++ b/lib/libesg/encapsulation/fragment_management_information.h
@@ -0,0 +1,96 @@
+/*
+ * ESG parser
+ *
+ * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef _ESG_ENCAPSULATION_FRAGMENT_MANAGEMENT_INFORMATION_H
+#define _ESG_ENCAPSULATION_FRAGMENT_MANAGEMENT_INFORMATION_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <stdint.h>
+
+/**
+ * esg_encapsulation_header structure.
+ */
+struct esg_encapsulation_header {
+	uint8_t fragment_reference_format;
+};
+
+/**
+ * esg_fragment_reference structure.
+ */
+struct esg_fragment_reference {
+	uint8_t fragment_type;
+	uint32_t data_repository_offset;
+};
+
+/**
+ * esg_encapsulation_entry structure.
+ */
+struct esg_encapsulation_entry {
+	struct esg_fragment_reference *fragment_reference;
+	uint8_t fragment_version;
+	uint32_t fragment_id;
+
+	struct esg_encapsulation_entry *_next;
+};
+
+/**
+ * esg_encapsulation_structure structure.
+ */
+struct esg_encapsulation_structure {
+	struct esg_encapsulation_header *header;
+	struct esg_encapsulation_entry *entry_list;
+};
+
+/**
+ * Process an esg_encapsulation_structure.
+ *
+ * @param buffer Binary buffer to decode.
+ * @param size Binary buffer size.
+ * @return Pointer to an esg_encapsulation_structure structure, or NULL on error.
+ */
+extern struct esg_encapsulation_structure *esg_encapsulation_structure_decode(uint8_t *buffer, uint32_t size);
+
+/**
+ * Free an esg_encapsulation_structure.
+ *
+ * @param container Pointer to an esg_container structure.
+ */
+extern void esg_encapsulation_structure_free(struct esg_encapsulation_structure *structure);
+
+/**
+ * Convenience iterator for entry_list field of an esg_encapsulation_structure.
+ *
+ * @param structure The esg_encapsulation_structure pointer.
+ * @param entry Variable holding a pointer to the current esg_encapsulation_entry.
+ */
+#define esg_encapsulation_structure_entry_list_for_each(structure, entry) \
+	for ((entry) = (structure)->entry_list; \
+	     (entry); \
+	     (entry) = (entry)->_next)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/lib/libesg/encapsulation/string_repository.c b/lib/libesg/encapsulation/string_repository.c
new file mode 100644
index 0000000..3b88742
--- /dev/null
+++ b/lib/libesg/encapsulation/string_repository.c
@@ -0,0 +1,54 @@
+/*
+ * ESG parser
+ *
+ * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <libesg/encapsulation/string_repository.h>
+
+struct esg_string_repository *esg_string_repository_decode(uint8_t *buffer, uint32_t size) {
+	struct esg_string_repository *string_repository;
+
+	if ((buffer == NULL) || (size <= 1)) {
+		return NULL;
+	}
+
+	string_repository = (struct esg_string_repository *) malloc(sizeof(struct esg_string_repository));
+	memset(string_repository, 0, sizeof(struct esg_string_repository));
+
+	string_repository->encoding_type = buffer[0];
+	string_repository->length = size-1;
+	string_repository->data = (uint8_t *) malloc(size-1);
+	memcpy(string_repository->data, buffer+1, size-1);
+
+	return string_repository;
+}
+
+void esg_string_repository_free(struct esg_string_repository *string_repository) {
+	if (string_repository == NULL) {
+		return;
+	}
+
+	if (string_repository->data) {
+		free(string_repository->data);
+	}
+
+	free(string_repository);
+}
diff --git a/lib/libesg/encapsulation/string_repository.h b/lib/libesg/encapsulation/string_repository.h
new file mode 100644
index 0000000..0cf64c2
--- /dev/null
+++ b/lib/libesg/encapsulation/string_repository.h
@@ -0,0 +1,60 @@
+/*
+ * ESG parser
+ *
+ * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef _ESG_ENCAPSULATION_STRING_REPOSITORY_H
+#define _ESG_ENCAPSULATION_STRING_REPOSITORY_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <stdint.h>
+
+/**
+ * esg_string_repository structure.
+ */
+struct esg_string_repository {
+	uint8_t encoding_type;
+	uint32_t length;
+	uint8_t *data;
+};
+
+/**
+ * Process an esg_string_repository.
+ *
+ * @param buffer Binary buffer to decode.
+ * @param size Binary buffer size.
+ * @return Pointer to an esg_string_repository structure, or NULL on error.
+ */
+extern struct esg_string_repository *esg_string_repository_decode(uint8_t *buffer, uint32_t size);
+
+/**
+ * Free an esg_string_repository.
+ *
+ * @param data_repository Pointer to an esg_string_repository structure.
+ */
+extern void esg_string_repository_free(struct esg_string_repository *string_repository);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif