You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
445 lines
13 KiB
445 lines
13 KiB
/*****************************************************************************
|
|
* psi.h: ISO/IEC 13818-1 Program Stream Information
|
|
*****************************************************************************
|
|
* Copyright (C) 2009-2010 VideoLAN
|
|
* $Id$
|
|
*
|
|
* Authors: Christophe Massiot <massiot@via.ecp.fr>
|
|
*
|
|
* 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:
|
|
* - ISO/IEC 13818-1:2007(E) (MPEG-2 Systems)
|
|
*/
|
|
|
|
#ifndef __BITSTREAM_MPEG_PSI_H__
|
|
#define __BITSTREAM_MPEG_PSI_H__
|
|
|
|
#include <bitstream/common.h>
|
|
#include <bitstream/mpeg/ts.h>
|
|
#include <bitstream/mpeg/psi/descriptors.h>
|
|
#include <bitstream/mpeg/psi/psi.h>
|
|
#include <bitstream/mpeg/psi/pat.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/*****************************************************************************
|
|
* Descriptor 0x05: Registration descriptor
|
|
*****************************************************************************/
|
|
#define DESC05_HEADER_SIZE (DESC_HEADER_SIZE + 4)
|
|
|
|
static inline void desc05_init(uint8_t *p_desc)
|
|
{
|
|
desc_set_tag(p_desc, 0x05);
|
|
desc_set_length(p_desc, DESC05_HEADER_SIZE - DESC_HEADER_SIZE);
|
|
}
|
|
|
|
static inline void desc05_set_identifier(uint8_t *p_desc, uint8_t p_id[4])
|
|
{
|
|
p_desc[2] = p_id[0];
|
|
p_desc[3] = p_id[1];
|
|
p_desc[4] = p_id[2];
|
|
p_desc[5] = p_id[3];
|
|
}
|
|
|
|
static inline const uint8_t *desc05_get_identifier(const uint8_t *p_desc)
|
|
{
|
|
return p_desc + 2;
|
|
}
|
|
|
|
static inline bool desc05_validate(const uint8_t *p_desc)
|
|
{
|
|
return desc_get_length(p_desc) >= DESC05_HEADER_SIZE - DESC_HEADER_SIZE;
|
|
}
|
|
|
|
static inline void desc05_print(const uint8_t *p_desc, f_print pf_print,
|
|
void *opaque, print_type_t i_print_type)
|
|
{
|
|
switch (i_print_type) {
|
|
case PRINT_XML:
|
|
pf_print(opaque, "<REGISTRATION_DESC identifier=\"%4.4s\"/>",
|
|
desc05_get_identifier(p_desc));
|
|
break;
|
|
default:
|
|
pf_print(opaque, " - desc 05 identifier=%4.4s",
|
|
desc05_get_identifier(p_desc));
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Descriptor 0x09: Conditional access descriptor
|
|
*****************************************************************************/
|
|
#define DESC09_HEADER_SIZE (DESC_HEADER_SIZE + 4)
|
|
|
|
static inline uint16_t desc09_get_sysid(const uint8_t *p_desc)
|
|
{
|
|
return (p_desc[2] << 8) | p_desc[3];
|
|
}
|
|
|
|
static inline uint16_t desc09_get_pid(const uint8_t *p_desc)
|
|
{
|
|
return ((p_desc[4] & 0x1f) << 8) | p_desc[5];
|
|
}
|
|
|
|
static inline bool desc09_validate(const uint8_t *p_desc)
|
|
{
|
|
return desc_get_length(p_desc) >= DESC09_HEADER_SIZE - DESC_HEADER_SIZE;
|
|
}
|
|
|
|
static inline void desc09_print(const uint8_t *p_desc, f_print pf_print,
|
|
void *opaque, print_type_t i_print_type)
|
|
{
|
|
switch (i_print_type) {
|
|
case PRINT_XML:
|
|
pf_print(opaque, "<CA_DESC sysid=\"0x%hx\" pid=\"%hu\"/>",
|
|
desc09_get_sysid(p_desc), desc09_get_pid(p_desc));
|
|
break;
|
|
default:
|
|
pf_print(opaque, " - desc 09 sysid=0x%hx pid=%hu",
|
|
desc09_get_sysid(p_desc), desc09_get_pid(p_desc));
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Descriptor 0x0a: ISO-639 language descriptor
|
|
*****************************************************************************/
|
|
#define DESC0A_HEADER_SIZE DESC_HEADER_SIZE
|
|
#define DESC0A_LANGUAGE_SIZE 4
|
|
|
|
static inline void desc0a_init(uint8_t *p_desc)
|
|
{
|
|
desc_set_tag(p_desc, 0x0a);
|
|
}
|
|
|
|
static inline uint8_t *desc0a_get_language(uint8_t *p_desc, uint8_t n)
|
|
{
|
|
uint8_t *p_desc_n = p_desc + DESC0A_HEADER_SIZE + n * DESC0A_LANGUAGE_SIZE;
|
|
if (p_desc_n + DESC0A_LANGUAGE_SIZE - p_desc
|
|
> desc_get_length(p_desc) + DESC0A_HEADER_SIZE)
|
|
return NULL;
|
|
return p_desc_n;
|
|
}
|
|
|
|
static inline void desc0an_set_code(uint8_t *p_desc_n, const uint8_t p_code[3])
|
|
{
|
|
p_desc_n[0] = p_code[0];
|
|
p_desc_n[1] = p_code[1];
|
|
p_desc_n[2] = p_code[2];
|
|
}
|
|
|
|
static inline const uint8_t *desc0an_get_code(const uint8_t *p_desc_n)
|
|
{
|
|
return p_desc_n;
|
|
}
|
|
|
|
static inline void desc0an_set_audiotype(uint8_t *p_desc_n, uint8_t i_type)
|
|
{
|
|
p_desc_n[3] = i_type;
|
|
}
|
|
|
|
static inline uint8_t desc0an_get_audiotype(const uint8_t *p_desc_n)
|
|
{
|
|
return p_desc_n[3];
|
|
}
|
|
|
|
static inline bool desc0a_validate(const uint8_t *p_desc)
|
|
{
|
|
return !(desc_get_length(p_desc) % DESC0A_LANGUAGE_SIZE);
|
|
}
|
|
|
|
static inline void desc0a_print(uint8_t *p_desc, f_print pf_print,
|
|
void *opaque, print_type_t i_print_type)
|
|
{
|
|
uint8_t j = 0;
|
|
uint8_t *p_desc_n;
|
|
|
|
while ((p_desc_n = desc0a_get_language(p_desc, j)) != NULL) {
|
|
j++;
|
|
switch (i_print_type) {
|
|
case PRINT_XML:
|
|
pf_print(opaque, "<AUDIO_LANGUAGE_DESC language=\"%3.3s\" audiotype=\"0x%hhx\"/>",
|
|
(const char *)desc0an_get_code(p_desc_n),
|
|
desc0an_get_audiotype(p_desc_n));
|
|
break;
|
|
default:
|
|
pf_print(opaque, " - desc 0a language=%3.3s audiotype=0x%hhx",
|
|
(const char *)desc0an_get_code(p_desc_n),
|
|
desc0an_get_audiotype(p_desc_n));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Conditional Access Table
|
|
*****************************************************************************/
|
|
#define CAT_PID 0x01
|
|
#define CAT_TABLE_ID 0x01
|
|
#define CAT_HEADER_SIZE PSI_HEADER_SIZE_SYNTAX1
|
|
|
|
static inline void cat_init(uint8_t *p_cat)
|
|
{
|
|
psi_init(p_cat, true);
|
|
psi_set_tableid(p_cat, CAT_TABLE_ID);
|
|
p_cat[1] &= ~0x40;
|
|
psi_set_section(p_cat, 0);
|
|
psi_set_lastsection(p_cat, 0);
|
|
}
|
|
|
|
static inline void cat_set_length(uint8_t *p_cat, uint16_t i_cat_length)
|
|
{
|
|
psi_set_length(p_cat, CAT_HEADER_SIZE + PSI_CRC_SIZE - PSI_HEADER_SIZE
|
|
+ i_cat_length);
|
|
}
|
|
|
|
static inline uint16_t cat_get_desclength(const uint8_t *p_cat)
|
|
{
|
|
return psi_get_length(p_cat) - (CAT_HEADER_SIZE + PSI_CRC_SIZE - PSI_HEADER_SIZE);
|
|
}
|
|
|
|
static inline uint8_t *cat_get_descl(uint8_t *p_cat)
|
|
{
|
|
return p_cat + CAT_HEADER_SIZE;
|
|
}
|
|
|
|
static inline const uint8_t *cat_get_descl_const(const uint8_t *p_cat)
|
|
{
|
|
return p_cat + CAT_HEADER_SIZE;
|
|
}
|
|
|
|
static inline bool cat_validate(const uint8_t *p_cat)
|
|
{
|
|
uint16_t i_section_size = psi_get_length(p_cat) + PSI_HEADER_SIZE
|
|
- PSI_CRC_SIZE;
|
|
|
|
if (!psi_get_syntax(p_cat) || psi_get_section(p_cat)
|
|
|| psi_get_lastsection(p_cat)
|
|
|| psi_get_tableid(p_cat) != CAT_TABLE_ID)
|
|
return false;
|
|
|
|
if (i_section_size < CAT_HEADER_SIZE
|
|
|| i_section_size < CAT_HEADER_SIZE + cat_get_desclength(p_cat))
|
|
return false;
|
|
|
|
if (!descl_validate(cat_get_descl_const(p_cat), cat_get_desclength(p_cat)))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static inline bool cat_table_validate(uint8_t **pp_sections)
|
|
{
|
|
uint8_t i_last_section = psi_table_get_lastsection(pp_sections);
|
|
uint8_t i;
|
|
|
|
for (i = 0; i <= i_last_section; i++) {
|
|
uint8_t *p_section = psi_table_get_section(pp_sections, i);
|
|
|
|
if (!psi_check_crc(p_section))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Program Map Table
|
|
*****************************************************************************/
|
|
#define PMT_TABLE_ID 0x2
|
|
#define PMT_HEADER_SIZE (PSI_HEADER_SIZE_SYNTAX1 + 4)
|
|
#define PMT_ES_SIZE 5
|
|
|
|
#define pmt_set_program psi_set_tableidext
|
|
#define pmt_get_program psi_get_tableidext
|
|
|
|
static inline void pmt_init(uint8_t *p_pmt)
|
|
{
|
|
psi_init(p_pmt, true);
|
|
psi_set_tableid(p_pmt, PMT_TABLE_ID);
|
|
p_pmt[1] &= ~0x40;
|
|
psi_set_section(p_pmt, 0);
|
|
psi_set_lastsection(p_pmt, 0);
|
|
p_pmt[8] = 0xe0;
|
|
p_pmt[10] = 0xf0;
|
|
}
|
|
|
|
static inline void pmt_set_length(uint8_t *p_pmt, uint16_t i_pmt_length)
|
|
{
|
|
psi_set_length(p_pmt, PMT_HEADER_SIZE + PSI_CRC_SIZE - PSI_HEADER_SIZE
|
|
+ i_pmt_length);
|
|
}
|
|
|
|
static inline void pmt_set_pcrpid(uint8_t *p_pmt, uint16_t i_pcr_pid)
|
|
{
|
|
p_pmt[8] &= ~0x1f;
|
|
p_pmt[8] |= i_pcr_pid >> 8;
|
|
p_pmt[9] = i_pcr_pid & 0xff;
|
|
}
|
|
|
|
static inline uint16_t pmt_get_pcrpid(const uint8_t *p_pmt)
|
|
{
|
|
return ((p_pmt[8] & 0x1f) << 8) | p_pmt[9];
|
|
}
|
|
|
|
static inline void pmt_set_desclength(uint8_t *p_pmt, uint16_t i_length)
|
|
{
|
|
p_pmt[10] &= ~0xf;
|
|
p_pmt[10] |= i_length >> 8;
|
|
p_pmt[11] = i_length & 0xff;
|
|
}
|
|
|
|
static inline uint16_t pmt_get_desclength(const uint8_t *p_pmt)
|
|
{
|
|
return ((p_pmt[10] & 0xf) << 8) | p_pmt[11];
|
|
}
|
|
|
|
static inline uint8_t *pmt_get_descs(uint8_t *p_pmt)
|
|
{
|
|
return &p_pmt[10];
|
|
}
|
|
|
|
static inline void pmtn_init(uint8_t *p_pmt_n)
|
|
{
|
|
p_pmt_n[1] = 0xe0;
|
|
p_pmt_n[3] = 0xf0;
|
|
}
|
|
|
|
static inline void pmtn_set_streamtype(uint8_t *p_pmt_n, uint8_t i_stream_type)
|
|
{
|
|
p_pmt_n[0] = i_stream_type;
|
|
}
|
|
|
|
static inline uint8_t pmtn_get_streamtype(const uint8_t *p_pmt_n)
|
|
{
|
|
return p_pmt_n[0];
|
|
}
|
|
|
|
static inline void pmtn_set_pid(uint8_t *p_pmt_n, uint16_t i_pid)
|
|
{
|
|
p_pmt_n[1] &= ~0x1f;
|
|
p_pmt_n[1] |= i_pid >> 8;
|
|
p_pmt_n[2] = i_pid & 0xff;
|
|
}
|
|
|
|
static inline uint16_t pmtn_get_pid(const uint8_t *p_pmt_n)
|
|
{
|
|
return ((p_pmt_n[1] & 0x1f) << 8) | p_pmt_n[2];
|
|
}
|
|
|
|
static inline void pmtn_set_desclength(uint8_t *p_pmt_n, uint16_t i_length)
|
|
{
|
|
p_pmt_n[3] &= ~0xf;
|
|
p_pmt_n[3] |= i_length >> 8;
|
|
p_pmt_n[4] = i_length & 0xff;
|
|
}
|
|
|
|
static inline uint16_t pmtn_get_desclength(const uint8_t *p_pmt_n)
|
|
{
|
|
return ((p_pmt_n[3] & 0xf) << 8) | p_pmt_n[4];
|
|
}
|
|
|
|
static inline uint8_t *pmtn_get_descs(uint8_t *p_pmt_n)
|
|
{
|
|
return &p_pmt_n[3];
|
|
}
|
|
|
|
static inline uint8_t *pmt_get_es(uint8_t *p_pmt, uint8_t n)
|
|
{
|
|
uint16_t i_section_size = psi_get_length(p_pmt) + PSI_HEADER_SIZE
|
|
- PSI_CRC_SIZE;
|
|
uint8_t *p_pmt_n = p_pmt + PMT_HEADER_SIZE + pmt_get_desclength(p_pmt);
|
|
if (p_pmt_n - p_pmt > i_section_size) return NULL;
|
|
|
|
while (n) {
|
|
if (p_pmt_n + PMT_ES_SIZE - p_pmt > i_section_size) return NULL;
|
|
p_pmt_n += PMT_ES_SIZE + pmtn_get_desclength(p_pmt_n);
|
|
n--;
|
|
}
|
|
if (p_pmt_n - p_pmt >= i_section_size) return NULL;
|
|
return p_pmt_n;
|
|
}
|
|
|
|
static inline bool pmt_validate_es(const uint8_t *p_pmt, const uint8_t *p_pmt_n,
|
|
uint16_t i_desclength)
|
|
{
|
|
uint16_t i_section_size = psi_get_length(p_pmt) + PSI_HEADER_SIZE
|
|
- PSI_CRC_SIZE;
|
|
return (p_pmt_n + PMT_ES_SIZE + i_desclength
|
|
<= p_pmt + i_section_size);
|
|
}
|
|
|
|
static inline bool pmt_validate(const uint8_t *p_pmt)
|
|
{
|
|
uint16_t i_section_size = psi_get_length(p_pmt) + PSI_HEADER_SIZE
|
|
- PSI_CRC_SIZE;
|
|
const uint8_t *p_pmt_n;
|
|
|
|
if (!psi_get_syntax(p_pmt) || psi_get_section(p_pmt)
|
|
|| psi_get_lastsection(p_pmt)
|
|
|| psi_get_tableid(p_pmt) != PMT_TABLE_ID)
|
|
return false;
|
|
|
|
if (!psi_check_crc(p_pmt))
|
|
return false;
|
|
|
|
if (i_section_size < PMT_HEADER_SIZE
|
|
|| i_section_size < PMT_HEADER_SIZE + pmt_get_desclength(p_pmt))
|
|
return false;
|
|
|
|
if (!descs_validate(p_pmt + 10))
|
|
return false;
|
|
|
|
p_pmt_n = p_pmt + PMT_HEADER_SIZE + pmt_get_desclength(p_pmt);
|
|
|
|
while (p_pmt_n + PMT_ES_SIZE - p_pmt <= i_section_size
|
|
&& p_pmt_n + PMT_ES_SIZE + pmtn_get_desclength(p_pmt_n) - p_pmt
|
|
<= i_section_size) {
|
|
if (!descs_validate(p_pmt_n + 3))
|
|
return false;
|
|
|
|
p_pmt_n += PMT_ES_SIZE + pmtn_get_desclength(p_pmt_n);
|
|
}
|
|
|
|
return (p_pmt_n - p_pmt == i_section_size);
|
|
}
|
|
|
|
static inline uint8_t *pmt_find_es(uint8_t *p_pmt, uint16_t i_pid)
|
|
{
|
|
uint8_t *p_es;
|
|
uint8_t j = 0;
|
|
|
|
while ((p_es = pmt_get_es(p_pmt, j)) != NULL) {
|
|
j++;
|
|
if (pmtn_get_pid(p_es) == i_pid)
|
|
return p_es;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|