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authoretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
committeretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
commitab959d7b4194715870128e616b8e29d4a101e488 (patch)
tree61a746231d30817be73416a7d67763fd677a1042 /lib/libesg/encapsulation/container.c
parent6b350466c4902c5b137e0efaf1d189128a7f18f5 (diff)
downloadlinux-dvb-apps-ab959d7b4194715870128e616b8e29d4a101e488.tar.gz
Imported Upstream version 1.1.1+rev1207upstream/1.1.1+rev1207
Diffstat (limited to '')
-rw-r--r--lib/libesg/encapsulation/container.c206
1 files changed, 206 insertions, 0 deletions
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);
+}