dtv-scan-tables.git - dtv-scan-tables Debian packaging

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1 files changed, 12 insertions, 1 deletions

/* * 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/representation/init_message.h> #include <libesg/representation/textual_decoder_init.h> #include <libesg/representation/bim_decoder_init.h> struct esg_init_message *esg_init_message_decode(uint8_t *buffer, uint32_t size) { uint32_t pos; struct esg_init_message *init_message; if ((buffer == NULL) || (size <= 3)) { return NULL; } pos = 0; init_message = (struct esg_init_message *) malloc(sizeof(struct esg_init_message)); memset(init_message, 0, sizeof(struct esg_init_message)); init_message->encoding_version = buffer[pos]; pos += 1; init_message->indexing_flag = (buffer[pos] & 0x80) >> 7; pos += 1; init_message->decoder_init_ptr = buffer[pos]; pos += 1; if (init_message->indexing_flag) { init_message->indexing_version = buffer[pos]; pos += 1; } switch (init_message->encoding_version) { case 0xF1: { struct esg_bim_encoding_parameters *encoding_parameters = (struct esg_bim_encoding_parameters *) malloc(sizeof(struct esg_bim_encoding_parameters)); memset(encoding_parameters, 0, sizeof(struct esg_bim_encoding_parameters)); init_message->encoding_parameters = (void *) encoding_parameters; encoding_parameters->buffer_size_flag = (buffer[pos] & 0x80) >> 7; encoding_parameters->position_code_flag = (buffer[pos] & 0x40) >> 6; pos += 1; encoding_parameters->character_encoding = buffer[pos]; pos += 1; if (encoding_parameters->buffer_size_flag) { encoding_parameters->buffer_size = (buffer[pos] << 16) | (buffer[pos+1] << 8) | buffer[pos+2]; pos += 3; } // TODO // init_message->decoder_init = (void *) esg_bim_decoder_init_decode(buffer + init_message->decoder_init_ptr, size - init_message->decoder_init_ptr); break; } case 0xF2: case 0xF3: { struct esg_textual_encoding_parameters *encoding_parameters = (struct esg_textual_encoding_parameters *) malloc(sizeof(struct esg_textual_encoding_parameters)); memset(encoding_parameters, 0, sizeof(struct esg_textual_encoding_parameters)); init_message->encoding_parameters = (void *) encoding_parameters; encoding_parameters->character_encoding = buffer[pos]; pos += 1; init_message->decoder_init = (void *) esg_textual_decoder_init_decode(buffer + init_message->decoder_init_ptr, size - init_message->decoder_init_ptr); break; } default: { esg_init_message_free(init_message); return NULL; } } return init_message; } void esg_init_message_free(struct esg_init_message *init_message) { if (init_message == NULL) { return; } if (init_message->encoding_parameters) { free(init_message->encoding_parameters); } if (init_message->decoder_init) { free(init_message->decoder_init); } free(init_message); }


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