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172 lines
4.9 KiB
172 lines
4.9 KiB
/*****************************************************************************
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* ci.h: ETSI EN 50 221 Common Interface Specification
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*****************************************************************************
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* Copyright (C) 2010 VideoLAN
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject
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* to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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/*
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* Normative references:
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* - ETSI EN 50 221 (1997) (Common Interface Specification)
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*/
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#ifndef __BITSTREAM_DVB_CI_H__
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#define __BITSTREAM_DVB_CI_H__
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#include <bitstream/mpeg/psi/psi.h>
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#include <bitstream/mpeg/psi/descriptors.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*****************************************************************************
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* Conditional Access Program Map Table
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*****************************************************************************
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* Implementation note: the first field here is ca_pmt_list_management,
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* since the previous length field is variable size and is generally put
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* afterwards.
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*****************************************************************************/
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#define CAPMT_HEADER_SIZE 6
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#define CAPMT_ES_SIZE 5
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#define CAPMTI_HEADER_SIZE 3
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/* Max theoritical size is PSI_MAX_SIZE + ~100 */
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#define CAPMT_DECLARE PSI_PRIVATE_DECLARE
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#define capmt_allocate psi_private_allocate
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static inline void capmt_init(uint8_t *p_capmt)
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{
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p_capmt[3] = 0xc1;
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p_capmt[4] = 0xf0;
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}
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static inline void capmt_set_listmanagement(uint8_t *p_capmt, uint8_t i_mgt)
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{
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p_capmt[0] = i_mgt;
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}
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static inline void capmt_set_program(uint8_t *p_capmt, uint16_t i_program)
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{
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p_capmt[1] = i_program >> 8;
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p_capmt[2] = i_program & 0xff;
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}
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static inline void capmt_set_version(uint8_t *p_capmt, uint8_t i_version)
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{
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p_capmt[3] &= ~0x3e;
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p_capmt[3] |= i_version << 1;
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}
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static inline uint8_t *capmt_get_infos(uint8_t *p_capmt)
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{
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return &p_capmt[4];
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}
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static inline uint16_t capmt_get_infoslength(const uint8_t *p_capmt)
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{
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return ((p_capmt[4] & 0xf) << 8) | p_capmt[5];
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}
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static inline void capmtn_init(uint8_t *p_capmt_n)
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{
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p_capmt_n[1] = 0xe0;
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}
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static inline void capmtn_set_streamtype(uint8_t *p_capmt_n,
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uint8_t i_stream_type)
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{
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p_capmt_n[0] = i_stream_type;
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}
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static inline void capmtn_set_pid(uint8_t *p_capmt_n, uint16_t i_pid)
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{
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p_capmt_n[1] &= ~0x1f;
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p_capmt_n[1] |= i_pid >> 8;
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p_capmt_n[2] = i_pid & 0xff;
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}
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static inline uint16_t capmtn_get_infoslength(const uint8_t *p_capmt_n)
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{
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return ((p_capmt_n[3] & 0xf) << 8) | p_capmt_n[4];
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}
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static inline uint8_t *capmtn_get_infos(uint8_t *p_capmt_n)
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{
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return &p_capmt_n[3];
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}
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static inline uint8_t *capmt_get_es(uint8_t *p_capmt, uint8_t n)
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{
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uint8_t *p_capmt_n = p_capmt + CAPMT_HEADER_SIZE
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+ capmt_get_infoslength(p_capmt);
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while (n) {
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p_capmt_n += CAPMT_ES_SIZE + capmtn_get_infoslength(p_capmt_n);
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n--;
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}
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return p_capmt_n;
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}
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static inline void capmti_init(uint8_t *p_infos)
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{
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p_infos[0] = 0xf0;
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}
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static inline void capmti_set_length(uint8_t *p_infos, uint16_t i_length)
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{
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p_infos[0] &= ~0xf;
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p_infos[0] |= i_length >> 8;
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p_infos[1] = i_length & 0xff;
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}
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static inline uint16_t capmti_get_length(const uint8_t *p_infos)
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{
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return ((p_infos[0] & 0xf) << 8) | p_infos[1];
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}
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static inline void capmti_set_cmd(uint8_t *p_infos, uint8_t i_cmd)
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{
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p_infos[2] = i_cmd;
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}
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static inline uint8_t *capmti_get_info(uint8_t *p_infos, uint16_t n)
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{
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uint8_t *p_info = p_infos + CAPMTI_HEADER_SIZE;
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uint16_t i_infos_size = capmti_get_length(p_infos) + DESCS_HEADER_SIZE;
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while (n) {
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if (p_info + DESC_HEADER_SIZE - p_infos > i_infos_size) return NULL;
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p_info += DESC_HEADER_SIZE + desc_get_length(p_info);
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n--;
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}
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if (p_info - p_infos >= i_infos_size) return NULL;
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return p_info;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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