/* Copyright (C) 2006 Adam Charrett 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 dr_83.c Decode Logical Channel Number Descriptor. */ #include "config.h" #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdint.h> #include "dvbpsi.h" #include "../dvbpsi_private.h" #include "descriptor.h" #include "dr_83.h" /***************************************************************************** * dvbpsi_DecodeLCNDr *****************************************************************************/ dvbpsi_lcn_dr_t *dvbpsi_DecodeLCNDr(dvbpsi_descriptor_t *p_descriptor) { dvbpsi_lcn_dr_t *p_decoded; int i; /* Check the tag */ if (p_descriptor->i_tag != 0x83) { return NULL; } /* Don't decode twice */ if (p_descriptor->p_decoded) { return p_descriptor->p_decoded; } /* Check length */ if (p_descriptor->i_length % 4) { return NULL; } p_decoded = (dvbpsi_lcn_dr_t*)malloc(sizeof(dvbpsi_lcn_dr_t)); if (!p_decoded) { return NULL; } p_decoded->i_number_of_entries = p_descriptor->i_length / 4; for (i = 0; i < p_decoded->i_number_of_entries; i ++) { p_decoded->p_entries[i].i_service_id = (p_descriptor->p_data[i * 4] << 8) | p_descriptor->p_data[(i * 4) + 1]; p_decoded->p_entries[i].b_visible_service_flag = (p_descriptor->p_data[(i * 4) + 2] >> 7) & 1; p_decoded->p_entries[i].i_logical_channel_number = ((p_descriptor->p_data[(i * 4) + 2] << 8) | p_descriptor->p_data[(i * 4) + 3]) & 0x3ff; } p_descriptor->p_decoded = (void*)p_decoded; return p_decoded; }