From ab959d7b4194715870128e616b8e29d4a101e488 Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:41 +0200 Subject: Imported Upstream version 1.1.1+rev1207 --- lib/libucsi/atsc/tvct_section.h | 227 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 227 insertions(+) create mode 100644 lib/libucsi/atsc/tvct_section.h (limited to 'lib/libucsi/atsc/tvct_section.h') diff --git a/lib/libucsi/atsc/tvct_section.h b/lib/libucsi/atsc/tvct_section.h new file mode 100644 index 0000000..77bc5f4 --- /dev/null +++ b/lib/libucsi/atsc/tvct_section.h @@ -0,0 +1,227 @@ +/* + * section and descriptor parser + * + * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org) + * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net) + * + * 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 + */ + +#ifndef _UCSI_ATSC_TVCT_SECTION_H +#define _UCSI_ATSC_TVCT_SECTION_H 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include + +/** + * atsc_tvct_section structure. + */ +struct atsc_tvct_section { + struct atsc_section_psip head; + + uint8_t num_channels_in_section; + /* struct atsc_tvct_channel channels[] */ + /* struct atsc_tvct_channel_part2 part2 */ +} __ucsi_packed; + +struct atsc_tvct_channel { + uint16_t short_name[7]; // UTF-16 network ordered + EBIT4(uint32_t reserved : 4; , + uint32_t major_channel_number :10; , + uint32_t minor_channel_number :10; , + uint32_t modulation_mode : 8; ); + uint32_t carrier_frequency; + uint16_t channel_TSID; + uint16_t program_number; + EBIT7(uint16_t ETM_location : 2; , + uint16_t access_controlled : 1; , + uint16_t hidden : 1; , + uint16_t reserved1 : 2; , + uint16_t hide_guide : 1; , + uint16_t reserved2 : 3; , + uint16_t service_type : 6; ); + uint16_t source_id; + EBIT2(uint16_t reserved3 : 6; , + uint16_t descriptors_length :10; ); + /* struct descriptor descriptors[] */ +} __ucsi_packed; + +struct atsc_tvct_section_part2 { + EBIT2(uint16_t reserved : 6; , + uint16_t descriptors_length :10; ); + /* struct descriptor descriptors[] */ +} __ucsi_packed; + +static inline struct atsc_tvct_channel *atsc_tvct_section_channels_first(struct atsc_tvct_section *tvct); +static inline struct atsc_tvct_channel * + atsc_tvct_section_channels_next(struct atsc_tvct_section *tvct, struct atsc_tvct_channel *pos, int idx); + +/** + * Process a atsc_tvct_section. + * + * @param section Pointer to an atsc_section_psip structure. + * @return atsc_tvct_section pointer, or NULL on error. + */ +struct atsc_tvct_section *atsc_tvct_section_codec(struct atsc_section_psip *section); + +/** + * Accessor for the transport_stream_id field of a TVCT. + * + * @param tvct TVCT pointer. + * @return The transport_stream_id. + */ +static inline uint16_t atsc_tvct_section_transport_stream_id(struct atsc_tvct_section *tvct) +{ + return tvct->head.ext_head.table_id_ext; +} + +/** + * Iterator for the channels field in an atsc_tvct_section. + * + * @param mgt atsc_tvct_section pointer. + * @param pos Variable containing a pointer to the current atsc_tvct_channel. + * @param idx Integer used to count which channel we in. + */ +#define atsc_tvct_section_channels_for_each(mgt, pos, idx) \ + for ((pos) = atsc_tvct_section_channels_first(mgt), idx=0; \ + (pos); \ + (pos) = atsc_tvct_section_channels_next(mgt, pos, ++idx)) + +/** + * Iterator for the descriptors field in a atsc_tvct_channel structure. + * + * @param channel atsc_tvct_channel pointer. + * @param pos Variable containing a pointer to the current descriptor. + */ +#define atsc_tvct_channel_descriptors_for_each(channel, pos) \ + for ((pos) = atsc_tvct_channel_descriptors_first(channel); \ + (pos); \ + (pos) = atsc_tvct_channel_descriptors_next(channel, pos)) + +/** + * Accessor for the second part of an atsc_tvct_section. + * + * @param mgt atsc_tvct_section pointer. + * @return atsc_tvct_section_part2 pointer. + */ +static inline struct atsc_tvct_section_part2 * + atsc_tvct_section_part2(struct atsc_tvct_section *mgt) +{ + int pos = sizeof(struct atsc_tvct_section); + + struct atsc_tvct_channel *cur_channel; + int idx; + atsc_tvct_section_channels_for_each(mgt, cur_channel, idx) { + pos += sizeof(struct atsc_tvct_channel); + pos += cur_channel->descriptors_length; + } + + return (struct atsc_tvct_section_part2 *) (((uint8_t*) mgt) + pos); +} + +/** + * Iterator for the descriptors field in a atsc_tvct_section structure. + * + * @param part2 atsc_tvct_section_part2 pointer. + * @param pos Variable containing a pointer to the current descriptor. + */ +#define atsc_tvct_section_part2_descriptors_for_each(part2, pos) \ + for ((pos) = atsc_tvct_section_part2_descriptors_first(part2); \ + (pos); \ + (pos) = atsc_tvct_section_part2_descriptors_next(part2, pos)) + + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct atsc_tvct_channel * + atsc_tvct_section_channels_first(struct atsc_tvct_section *tvct) +{ + size_t pos = sizeof(struct atsc_tvct_section); + + if (tvct->num_channels_in_section == 0) + return NULL; + + return (struct atsc_tvct_channel*) (((uint8_t *) tvct) + pos); +} + +static inline struct atsc_tvct_channel * + atsc_tvct_section_channels_next(struct atsc_tvct_section *tvct, + struct atsc_tvct_channel *pos, + int idx) +{ + if (idx >= tvct->num_channels_in_section) + return NULL; + + return (struct atsc_tvct_channel *) + (((uint8_t*) pos) + sizeof(struct atsc_tvct_channel) + pos->descriptors_length); +} + +static inline struct descriptor * + atsc_tvct_channel_descriptors_first(struct atsc_tvct_channel *channel) +{ + size_t pos = sizeof(struct atsc_tvct_channel); + + if (channel->descriptors_length == 0) + return NULL; + + return (struct descriptor*) (((uint8_t *) channel) + pos); +} + +static inline struct descriptor * + atsc_tvct_channel_descriptors_next(struct atsc_tvct_channel *channel, + struct descriptor *pos) +{ + return next_descriptor((uint8_t*) channel + sizeof(struct atsc_tvct_channel), + channel->descriptors_length, + pos); +} + +static inline struct descriptor * + atsc_tvct_section_part2_descriptors_first(struct atsc_tvct_section_part2 *part2) +{ + size_t pos = sizeof(struct atsc_tvct_section_part2); + + if (part2->descriptors_length == 0) + return NULL; + + return (struct descriptor*) (((uint8_t *) part2) + pos); +} + +static inline struct descriptor * + atsc_tvct_section_part2_descriptors_next(struct atsc_tvct_section_part2 *part2, + struct descriptor *pos) +{ + return next_descriptor((uint8_t*) part2 + sizeof(struct atsc_tvct_section_part2), + part2->descriptors_length, + pos); +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3