From 1ce81e11007032fd2f3b08186cfa8f6f579e1cfc Mon Sep 17 00:00:00 2001 From: Georgi Chorbadzhiyski Date: Mon, 10 Oct 2011 16:10:54 +0300 Subject: [PATCH] dvb/si: Add support for descriptor 0x4e (Extended event descriptor). --- dvb/si/desc_4e.h | 273 +++++++++++++++++++++++++++++++++++++++++ dvb/si/descs_list.h | 1 + mpeg/psi/descs_print.h | 1 + 3 files changed, 275 insertions(+) create mode 100644 dvb/si/desc_4e.h diff --git a/dvb/si/desc_4e.h b/dvb/si/desc_4e.h new file mode 100644 index 0000000..2c80bd0 --- /dev/null +++ b/dvb/si/desc_4e.h @@ -0,0 +1,273 @@ +/***************************************************************************** + * desc_4e.h: ETSI EN 300 468 Descriptor 0x4e: Extended event descriptor + ***************************************************************************** + * Copyright (C) 2011 Unix Solutions Ltd. + * + * Authors: Georgi Chorbadzhiyski + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject + * to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY + * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + *****************************************************************************/ + +/* + * Normative references: + * - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems) + */ + +#ifndef __BITSTREAM_DVB_DESC_4E_H__ +#define __BITSTREAM_DVB_DESC_4E_H__ + +#include +#include +#include + +#ifdef __cplusplus +extern "C" +{ +#endif + +/***************************************************************************** + * Descriptor 0x4e: Extended event descriptor + *****************************************************************************/ +#define DESC4E_HEADER_SIZE (DESC_HEADER_SIZE + 4) + +static inline void desc4e_init(uint8_t *p_desc) +{ + desc_set_tag(p_desc, 0x4e); +} + +static inline uint8_t desc4e_get_desc_number(uint8_t *p_desc) +{ + return p_desc[2] >> 4; +} + +static inline void desc4e_set_desc_number(uint8_t *p_desc, uint8_t i_desc_number) +{ + p_desc[2] = (i_desc_number << 4) | (p_desc[2] & 0x0f); +} + +static inline uint8_t desc4e_get_last_desc_number(uint8_t *p_desc) +{ + return p_desc[2] & 0x0f; +} + +static inline void desc4e_set_last_desc_number(uint8_t *p_desc, uint8_t i_last_desc_number) +{ + p_desc[2] = (p_desc[2] & 0xf0) | (i_last_desc_number & 0x0f); +} + +static inline const uint8_t *desc4e_get_lang(const uint8_t *p_desc) +{ + return p_desc + 3; +} + +static inline void desc4e_set_lang(uint8_t *p_desc_n, const uint8_t p_code[3]) +{ + p_desc_n[3] = p_code[0]; + p_desc_n[4] = p_code[1]; + p_desc_n[5] = p_code[2]; +} + +static inline uint8_t desc4e_get_items_length(const uint8_t *p_desc) +{ + return p_desc[6]; +} + +static inline void desc4e_set_items_length(uint8_t *p_desc, uint8_t i_length) +{ + p_desc[6] = i_length; +} + +static inline uint8_t *desc4e_get_item(uint8_t *p_desc, uint8_t n) +{ + uint8_t *p = p_desc + DESC4E_HEADER_SIZE; + uint8_t *p_item, *p_items, *p_items_end; + + uint8_t i_items_len = *p; + if (!i_items_len) + return NULL; + + p_items = p_item = p + 1; + p_items_end = p_items + i_items_len; + + if (n == 0) + return p_item; + + while ( p_item < p_items_end ) { + p_item += 1 + p_item[0]; /* Skip item description */ + p_item += 1 + p_item[0]; /* Skip item text */ + if ( --n == 0 && p_item < p_items_end ) + return p_item; + } + + return NULL; +} + +static inline const uint8_t *desc4en_get_item_description(const uint8_t *p_desc_n, uint8_t *i_length) +{ + *i_length = p_desc_n[0]; + return p_desc_n + 1; +} + +static inline void desc4en_set_item_description(uint8_t *p_desc_n, uint8_t *item_description, uint8_t i_length) +{ + p_desc_n[0] = i_length; + memcpy(p_desc_n + 1, item_description, i_length); +} + +static inline const uint8_t *desc4en_get_item_text(const uint8_t *p_desc_n, uint8_t *i_length) +{ + const uint8_t *p_ret = p_desc_n + 1 + p_desc_n[0]; + *i_length = p_ret[0]; + return p_ret + 1; +} + +static inline void desc4en_set_item_text(uint8_t *p_desc_n, uint8_t *item_text, uint8_t i_length) +{ + uint8_t *p = p_desc_n + 1 + p_desc_n[0]; + p[0] = i_length; + memcpy(p + 1, item_text, i_length); +} + +static inline uint8_t *desc4e_get_text(uint8_t *p_desc, uint8_t *i_length) +{ + uint8_t *p = p_desc + DESC4E_HEADER_SIZE + 1 + desc4e_get_items_length(p_desc); + *i_length = p[0]; + return p + 1; +} + +static inline void desc4e_set_text(uint8_t *p_desc, uint8_t *p_text, uint8_t i_length) +{ + uint8_t *p = p_desc + DESC4E_HEADER_SIZE + 1 + desc4e_get_items_length(p_desc); + p[0] = i_length; + memcpy(p + 1, p_text, i_length); +} + +static inline void desc4e_set_length(uint8_t *p_desc) +{ + uint8_t i_text_len; + desc4e_get_text(p_desc, &i_text_len); + desc_set_length(p_desc, (DESC4E_HEADER_SIZE - DESC_HEADER_SIZE) + + 1 + desc4e_get_items_length(p_desc) + + 1 + i_text_len); +} + +static inline bool desc4e_validate(const uint8_t *p_desc) +{ + uint8_t i_length = desc_get_length(p_desc); + int i_items_len; + const uint8_t *p = p_desc + DESC4E_HEADER_SIZE; + const uint8_t *p_items, *p_items_end, *p_item; + + if (DESC4E_HEADER_SIZE + 2 > i_length + DESC_HEADER_SIZE) + return false; + + i_items_len = *p; + p_items = p_item = p + 1; + p_items_end = p_items + i_items_len; + + p += 1 + p[0]; /* Check item loop */ + if (p + 1 - p_desc > i_length + DESC_HEADER_SIZE) + return false; + + p += 1 + p[0]; /* Check text */ + if (p - p_desc > i_length + DESC_HEADER_SIZE) + return false; + + while ( p_item < p_items_end ) { + p_item += 1 + p_item[0]; /* Check item description */ + if ( p_item > p_items_end ) + return false; + p_item += 1 + p_item[0]; /* Check item text */ + if ( p_item > p_items_end ) + return false; + } + + return true; +} + +static inline void desc4e_print(uint8_t *p_desc, + f_print pf_print, void *print_opaque, + f_iconv pf_iconv, void *iconv_opaque, + print_type_t i_print_type) +{ + uint8_t i_text_length; + uint8_t *p_text = desc4e_get_text(p_desc, &i_text_length); + + char *psz_text = dvb_string_get(p_text, i_text_length, + pf_iconv, iconv_opaque); + + switch (i_print_type) { + case PRINT_XML: + psz_text = dvb_string_xml_escape(psz_text); + pf_print(print_opaque, + "", + desc4e_get_desc_number(p_desc), + desc4e_get_last_desc_number(p_desc), + (char *)desc4e_get_lang(p_desc), + psz_text + ); + break; + default: + pf_print(print_opaque, + " - desc 4e extended_event desc_number=%u" + " last_desc_number=%u lang=%3.3s text=\"%s\"", + desc4e_get_desc_number(p_desc), + desc4e_get_last_desc_number(p_desc), + (char *)desc4e_get_lang(p_desc), + psz_text + ); + } + free( psz_text ); + + uint8_t j = 0; + const uint8_t *p_desc_n; + while ((p_desc_n = desc4e_get_item(p_desc, j++)) != NULL) { + uint8_t i_desc_length, i_item_length; + const uint8_t *p_desc = desc4en_get_item_description(p_desc_n, &i_desc_length); + const uint8_t *p_item = desc4en_get_item_text(p_desc_n, &i_item_length); + char *psz_desc = dvb_string_get(p_desc, i_desc_length, pf_iconv, iconv_opaque); + char *psz_item = dvb_string_get(p_item, i_item_length, pf_iconv, iconv_opaque); + + switch (i_print_type) { + case PRINT_XML: + psz_desc = dvb_string_xml_escape(psz_desc); + psz_item = dvb_string_xml_escape(psz_item); + pf_print(print_opaque, "", + psz_desc, psz_item); + break; + default: + pf_print(print_opaque," - extended_event_item description=\"%s\" text=\"%s\"", + psz_desc, psz_item); + } + + free(psz_desc); + free(psz_item); + } + + if (i_print_type == PRINT_XML) + pf_print(print_opaque, ""); +} + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/dvb/si/descs_list.h b/dvb/si/descs_list.h index 4b8d700..f322835 100644 --- a/dvb/si/descs_list.h +++ b/dvb/si/descs_list.h @@ -43,6 +43,7 @@ #include #include #include +#include #include #include #include diff --git a/mpeg/psi/descs_print.h b/mpeg/psi/descs_print.h index 62acb82..b596dd7 100644 --- a/mpeg/psi/descs_print.h +++ b/mpeg/psi/descs_print.h @@ -126,6 +126,7 @@ static inline void descl_print(uint8_t *p_descl, uint16_t i_length, CASE_DESC_ICONV(48) CASE_DESC(4a) CASE_DESC_ICONV(4d) + CASE_DESC_ICONV(4e) CASE_DESC(56) CASE_DESC(59) CASE_DESC(5a)