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/mpeg/pmt_section.h | 188 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 188 insertions(+) create mode 100644 lib/libucsi/mpeg/pmt_section.h (limited to 'lib/libucsi/mpeg/pmt_section.h') diff --git a/lib/libucsi/mpeg/pmt_section.h b/lib/libucsi/mpeg/pmt_section.h new file mode 100644 index 0000000..03dea1b --- /dev/null +++ b/lib/libucsi/mpeg/pmt_section.h @@ -0,0 +1,188 @@ +/* + * 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_MPEG_PMT_SECTION_H +#define _UCSI_MPEG_PMT_SECTION_H 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include + +/** + * mpeg_pmt_section structure. + */ +struct mpeg_pmt_section { + struct section_ext head; + + EBIT2(uint16_t reserved_1 : 3; , + uint16_t pcr_pid :13; ); + EBIT2(uint16_t reserved_2 : 4; , + uint16_t program_info_length :12; ); + /* struct descriptor descriptors[] */ + /* struct mpeg_pmt_stream streams[] */ +} __ucsi_packed; + +/** + * A stream within an mpeg_pmt_section. + */ +struct mpeg_pmt_stream { + uint8_t stream_type; + EBIT2(uint16_t reserved_1 : 3; , + uint16_t pid :13; ); + EBIT2(uint16_t reserved_2 : 4; , + uint16_t es_info_length :12; ); + + /* struct descriptor descriptors[] */ +} __ucsi_packed; + +/** + * Process an mpeg_pmt_section section. + * + * @param section Pointer to the generic section header. + * @return Pointer to the mpeg_pmt_section structure, or NULL on error. + */ +extern struct mpeg_pmt_section *mpeg_pmt_section_codec(struct section_ext *section); + +/** + * Accessor for program_number field of a PMT. + * + * @param pmt PMT pointer. + * @return The program_number. + */ +static inline uint16_t mpeg_pmt_section_program_number(struct mpeg_pmt_section *pmt) +{ + return pmt->head.table_id_ext; +} + +/** + * Convenience iterator for the descriptors field of the mpeg_pmt_section structure. + * + * @param pmt Pointer to the mpeg_pmt_section structure. + * @param pos Variable holding a pointer to the current descriptor. + */ +#define mpeg_pmt_section_descriptors_for_each(pmt, pos) \ + for ((pos) = mpeg_pmt_section_descriptors_first(pmt); \ + (pos); \ + (pos) = mpeg_pmt_section_descriptors_next(pmt, pos)) + +/** + * Convenience iterator for the streams field of the mpeg_pmt_section structure. + * + * @param pmt Pointer to the mpeg_pmt_section structure. + * @param pos Variable holding a pointer to the current mpeg_pmt_stream. + */ +#define mpeg_pmt_section_streams_for_each(pmt, pos) \ + for ((pos) = mpeg_pmt_section_streams_first(pmt); \ + (pos); \ + (pos) = mpeg_pmt_section_streams_next(pmt, pos)) + +/** + * Convenience iterator for the descriptors field of an mpeg_pmt_stream structure. + * + * @param stream Pointer to the mpeg_pmt_stream structure. + * @param pos Variable holding a pointer to the current descriptor. + */ +#define mpeg_pmt_stream_descriptors_for_each(stream, pos) \ + for ((pos) = mpeg_pmt_stream_descriptors_first(stream); \ + (pos); \ + (pos) = mpeg_pmt_stream_descriptors_next(stream, pos)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct descriptor * + mpeg_pmt_section_descriptors_first(struct mpeg_pmt_section * pmt) +{ + if (pmt->program_info_length == 0) + return NULL; + + return (struct descriptor *) + ((uint8_t *) pmt + sizeof(struct mpeg_pmt_section)); +} + +static inline struct descriptor * + mpeg_pmt_section_descriptors_next(struct mpeg_pmt_section *pmt, + struct descriptor* pos) +{ + return next_descriptor((uint8_t *) pmt + sizeof(struct mpeg_pmt_section), + pmt->program_info_length, + pos); +} + +static inline struct mpeg_pmt_stream * + mpeg_pmt_section_streams_first(struct mpeg_pmt_section * pmt) +{ + size_t pos = sizeof(struct mpeg_pmt_section) + pmt->program_info_length; + + if (pos >= section_ext_length(&pmt->head)) + return NULL; + + return (struct mpeg_pmt_stream *)((uint8_t *)pmt + pos); +} + +static inline struct mpeg_pmt_stream * + mpeg_pmt_section_streams_next(struct mpeg_pmt_section * pmt, + struct mpeg_pmt_stream * pos) +{ + uint8_t *end = (uint8_t*) pmt + section_ext_length(&pmt->head); + uint8_t *next = (uint8_t *) pos + sizeof(struct mpeg_pmt_stream) + + pos->es_info_length; + + if (next >= end) + return NULL; + + return (struct mpeg_pmt_stream *) next; +} + +static inline struct descriptor * + mpeg_pmt_stream_descriptors_first(struct mpeg_pmt_stream *stream) +{ + if (stream->es_info_length == 0) + return NULL; + + return (struct descriptor *) + ((uint8_t*) stream + sizeof(struct mpeg_pmt_stream)); +} + +static inline struct descriptor * + mpeg_pmt_stream_descriptors_next(struct mpeg_pmt_stream *stream, + struct descriptor* pos) +{ + return next_descriptor((uint8_t *) stream + sizeof(struct mpeg_pmt_stream), + stream->es_info_length, + pos); +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3