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206 lines
7.1 KiB
206 lines
7.1 KiB
/*****************************************************************************
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* desc_5a.h: ETSI EN 300 468 Descriptor 0x5a: Terrestrial delivery system
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*****************************************************************************
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* Copyright (C) 2009-2010 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 300 468 V1.11.1 (2010-04) (SI in DVB systems)
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*/
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#ifndef __BITSTREAM_DVB_DESC_5A_H__
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#define __BITSTREAM_DVB_DESC_5A_H__
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#include <inttypes.h> /* PRIu64 */
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#include <bitstream/common.h>
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#include <bitstream/mpeg/psi/descriptors.h>
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#include <bitstream/dvb/si/desc_43.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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* Descriptor 0x5a: Terrestrial delivery system descriptor
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*****************************************************************************/
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#define DESC5A_HEADER_SIZE (DESC_HEADER_SIZE + 11)
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static inline uint64_t desc5a_get_frequency(const uint8_t *p_desc)
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{
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return (((uint64_t)p_desc[2] << 24) | (p_desc[3] << 16) | (p_desc[4] << 8)
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| p_desc[5]) * 10; /* Hz */
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}
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static inline uint8_t desc5a_get_bandwidth(const uint8_t *p_desc)
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{
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return p_desc[6] >> 5;
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}
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static inline bool desc5a_get_priority(const uint8_t *p_desc)
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{
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return !!((p_desc[6] >> 4) & 0x1);
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}
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/* ! inverted logic ! */
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static inline bool desc5a_get_timeslicing(const uint8_t *p_desc)
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{
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return !((p_desc[6] >> 3) & 0x1);
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}
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/* ! inverted logic ! */
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static inline bool desc5a_get_mpefec(const uint8_t *p_desc)
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{
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return !((p_desc[6] >> 2) & 0x1);
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}
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static inline uint8_t desc5a_get_constellation(const uint8_t *p_desc)
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{
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return p_desc[7] >> 6;
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}
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static inline uint8_t desc5a_get_hierarchy(const uint8_t *p_desc)
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{
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return (p_desc[7] >> 3) & 0x7;
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}
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static inline uint8_t desc5a_get_coderatehp(const uint8_t *p_desc)
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{
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return p_desc[7] & 0x7;
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}
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static inline uint8_t desc5a_get_coderatelp(const uint8_t *p_desc)
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{
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return p_desc[8] >> 5;
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}
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static inline uint8_t desc5a_get_guard(const uint8_t *p_desc)
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{
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return (p_desc[8] >> 3) & 0x3;
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}
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static inline uint8_t desc5a_get_transmission(const uint8_t *p_desc)
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{
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return (p_desc[8] >> 1) & 0x3;
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}
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static inline bool desc5a_get_otherfrequency(const uint8_t *p_desc)
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{
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return !!(p_desc[8] & 0x1);
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}
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static inline bool desc5a_validate(const uint8_t *p_desc)
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{
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return desc_get_length(p_desc) >= DESC5A_HEADER_SIZE - DESC_HEADER_SIZE;
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}
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static inline void desc5a_print(const uint8_t *p_desc, f_print pf_print,
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void *opaque, print_type_t i_print_type)
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{
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uint8_t i_bandwidth = desc5a_get_bandwidth(p_desc);
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uint8_t i_constellation = desc5a_get_constellation(p_desc);
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const char *psz_constellation = "reserved";
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uint8_t i_hierarchy = desc5a_get_hierarchy(p_desc);
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const char *psz_hierarchy = "";
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bool b_hierarchy = !!(i_hierarchy & 0x3);
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uint8_t i_guard = desc5a_get_guard(p_desc);
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const char *psz_guard = "";
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uint8_t i_transmission = desc5a_get_transmission(p_desc);
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const char *psz_transmission = "reserved";
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switch (i_bandwidth) {
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case 0x0: i_bandwidth = 8; break;
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case 0x1: i_bandwidth = 7; break;
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case 0x2: i_bandwidth = 6; break;
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case 0x3: i_bandwidth = 5; break;
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default: i_bandwidth = 0; break;
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}
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switch (i_constellation) {
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case 0x0: psz_constellation = "QPSK"; break;
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case 0x1: psz_constellation = "16-qam"; break;
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case 0x2: psz_constellation = "64-qam"; break;
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}
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switch (i_hierarchy) {
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case 0x0: psz_hierarchy = "none"; break;
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case 0x1: psz_hierarchy = "1"; break;
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case 0x2: psz_hierarchy = "2"; break;
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case 0x3: psz_hierarchy = "4"; break;
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case 0x4: psz_hierarchy = "none+in-depth"; break;
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case 0x5: psz_hierarchy = "1+in-depth"; break;
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case 0x6: psz_hierarchy = "2+in-depth"; break;
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case 0x7: psz_hierarchy = "4+in-depth"; break;
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}
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switch (i_guard) {
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case 0x0: psz_guard = "1/32"; break;
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case 0x1: psz_guard = "1/16"; break;
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case 0x2: psz_guard = "1/8"; break;
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case 0x3: psz_guard = "1/4"; break;
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}
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switch (i_transmission) {
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case 0x0: psz_transmission = "2k"; break;
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case 0x1: psz_transmission = "8k"; break;
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case 0x2: psz_transmission = "4k"; break;
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}
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switch (i_print_type) {
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case PRINT_XML:
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pf_print(opaque,
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"<TERRESTRIAL_DESC frequency=\"%"PRIu64"\" bandwidth=\"%u\" priority=\"%s\" timeslicing=\"%d\" mpefec=\"%d\" constellation=\"%s\" hierarchy=\"%s\" coderatehp=\"%s\" coderatelp=\"%s\" guard=\"%s\" transmission=\"%s\" otherfrequency=\"%d\"/>",
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desc5a_get_frequency(p_desc), i_bandwidth,
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desc5a_get_priority(p_desc) ? "HP" : "LP",
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desc5a_get_timeslicing(p_desc) ? 1 : 0,
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desc5a_get_mpefec(p_desc) ? 1 : 0, psz_constellation,
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psz_hierarchy,
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dvb_delivery_get_fec(desc5a_get_coderatehp(p_desc)),
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b_hierarchy ? dvb_delivery_get_fec(desc5a_get_coderatehp(p_desc)) : "not_applicable",
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psz_guard, psz_transmission,
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desc5a_get_otherfrequency(p_desc) ? 1 : 0);
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break;
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default:
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pf_print(opaque,
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" - desc 5a dvb-t frequency=%"PRIu64" Hz bandwidth=%u MHz priority=%s%s%s constellation=%s hierarchy=%s coderatehp=%s%s%s guard=%s transmission=%s%s",
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desc5a_get_frequency(p_desc), i_bandwidth,
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desc5a_get_priority(p_desc) ? "HP" : "LP",
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desc5a_get_timeslicing(p_desc) ? " timeslicing" : "",
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desc5a_get_mpefec(p_desc) ? " mpefec" : "", psz_constellation,
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psz_hierarchy,
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dvb_delivery_get_fec(desc5a_get_coderatehp(p_desc)),
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b_hierarchy ? "coderatelp=" : "",
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b_hierarchy ? dvb_delivery_get_fec(desc5a_get_coderatehp(p_desc)) : "",
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psz_guard, psz_transmission,
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desc5a_get_otherfrequency(p_desc) ? " otherfrequency" : "");
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}
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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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