Commit 1ce81e11 authored by Georgi Chorbadzhiyski's avatar Georgi Chorbadzhiyski

dvb/si: Add support for descriptor 0x4e (Extended event descriptor).

parent 9c6d6fcc
/*****************************************************************************
* desc_4e.h: ETSI EN 300 468 Descriptor 0x4e: Extended event descriptor
*****************************************************************************
* Copyright (C) 2011 Unix Solutions Ltd.
*
* Authors: Georgi Chorbadzhiyski <georgi@unixsol.org>
*
* 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 <bitstream/common.h>
#include <bitstream/mpeg/psi/descriptors.h>
#include <bitstream/dvb/si/strings.h>
#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,
"<EXTENDED_EVENT_DESC 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
);
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, "<EXTENDED_EVENT_ITEM description=\"%s\" text=\"%s\"/>",
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, "</EXTENDED_EVENT_DESC>");
}
#ifdef __cplusplus
}
#endif
#endif
......@@ -43,6 +43,7 @@
#include <bitstream/dvb/si/desc_48.h>
#include <bitstream/dvb/si/desc_4a.h>
#include <bitstream/dvb/si/desc_4d.h>
#include <bitstream/dvb/si/desc_4e.h>
#include <bitstream/dvb/si/desc_56.h>
#include <bitstream/dvb/si/desc_59.h>
#include <bitstream/dvb/si/desc_5a.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)
......
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