shenmc
/
bitstream
1
0
Fork 0
Code Issues 0 Pull Requests 0 Projects 0 Releases 0 Wiki Activity
Bitstream by VideoLAN
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.
256 Commits
1 Branch
754 KiB
 
 
 
Tree: 57197d858c
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '57197d858c'
${ noResults }
bitstream/scte/35.h

732 lines
25 KiB
Raw Blame History

/*****************************************************************************
* 35.h: SCTE 35 Digital Program Insertion Cueing Message for Cable
*****************************************************************************
* Copyright (C) 2015 VideoLAN
*
* 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:
* - SCTE 35 2013 (Digital Program Insertion Cueing Message for Cable)
*/
#ifndef __BITSTREAM_SCTE_35_H__
#define __BITSTREAM_SCTE_35_H__
#include <bitstream/common.h>
#include <bitstream/mpeg/psi/psi.h>
#include <bitstream/mpeg/psi/descriptors.h>
#ifdef __cplusplus
extern "C"
{
#endif
/*****************************************************************************
* Splice Information Table
*****************************************************************************/
#define SCTE35_TABLE_ID 0xfc
#define SCTE35_HEADER_SIZE (PSI_HEADER_SIZE + 11)
#define SCTE35_HEADER2_SIZE 2
static inline void scte35_init(uint8_t *p_scte35)
{
psi_set_tableid(p_scte35, SCTE35_TABLE_ID);
psi_init(p_scte35, false);
p_scte35[1] &= ~0x40; /* private indicator */
p_scte35[3] = 0;
p_scte35[4] = 0;
p_scte35[9] = 0;
p_scte35[10] = 0xff;
p_scte35[11] = 0xf0;
}
static inline uint8_t scte35_get_protocol(const uint8_t *p_scte35)
{
return p_scte35[3];
}
static inline void scte35_set_protocol(uint8_t *p_scte35, uint8_t i_version)
{
p_scte35[3] = i_version;
}
static inline bool scte35_is_encrypted(const uint8_t *p_scte35)
{
return !!(p_scte35[4] & 0x80);
}
static inline void scte35_set_encrypted(uint8_t *p_scte35, bool b_encrypted)
{
if (b_encrypted)
p_scte35[4] |= 0x80;
else
p_scte35[4] &= ~0x80;
}
static inline uint64_t scte35_get_pts_adjustment(const uint8_t *p_scte35)
{
return ((uint64_t)(p_scte35[4] & 0x1) << 32) |
(p_scte35[5] << 24) | (p_scte35[6] << 16) |
(p_scte35[7] << 8) | p_scte35[8];
}
static inline void scte35_set_pts_adjustment(uint8_t *p_scte35,
uint64_t i_adjustment)
{
p_scte35[4] &= ~0x1;
p_scte35[4] |= (i_adjustment >> 32) & 0x1;
p_scte35[5] = (i_adjustment >> 24) & 0xff;
p_scte35[6] = (i_adjustment >> 16) & 0xff;
p_scte35[7] = (i_adjustment >> 8) & 0xff;
p_scte35[8] = i_adjustment & 0xff;
}
static inline uint16_t scte35_get_command_length(const uint8_t *p_scte35)
{
return ((p_scte35[11] & 0xf) << 8) | p_scte35[12];
}
static inline void scte35_set_command_length(uint8_t *p_scte35,
uint16_t i_length)
{
p_scte35[11] &= ~0xf;
p_scte35[11] |= (i_length >> 8) & 0xf;
p_scte35[12] = i_length & 0xff;
}
static inline uint8_t scte35_get_command_type(const uint8_t *p_scte35)
{
return p_scte35[13];
}
static inline void scte35_set_command_type(uint8_t *p_scte35, uint8_t i_type)
{
p_scte35[13] = i_type;
}
static inline uint8_t *scte35_get_command(const uint8_t *p_scte35)
{
return (uint8_t *)p_scte35 + SCTE35_HEADER_SIZE;
}
static inline uint16_t scte35_get_desclength(const uint8_t *p_scte35)
{
uint16_t i_command_length = scte35_get_command_length(p_scte35);
if (i_command_length == 0xfff)
return 0;
const uint8_t *pi_desclength = scte35_get_command(p_scte35) +
i_command_length;
return (pi_desclength[0] << 8) | pi_desclength[1];
}
static inline void scte35_set_desclength(uint8_t *p_scte35, uint16_t i_length)
{
uint8_t *pi_desclength = scte35_get_command(p_scte35) +
scte35_get_command_length(p_scte35);
pi_desclength[0] = (i_length >> 8) & 0xff;
pi_desclength[1] = i_length & 0xff;
}
static inline uint8_t *scte35_get_descl(const uint8_t *p_scte35)
{
uint16_t i_command_length = scte35_get_command_length(p_scte35);
if (i_command_length == 0xfff)
return NULL;
return scte35_get_command(p_scte35) + i_command_length +
SCTE35_HEADER2_SIZE;
}
/*****************************************************************************
* Splice Information Table - splice_time structure
*****************************************************************************/
#define SCTE35_SPLICE_TIME_HEADER_SIZE 1
#define SCTE35_SPLICE_TIME_TIME_SIZE 4
static inline void scte35_splice_time_init(uint8_t *p_splice_time)
{
p_splice_time[0] = 0x7f;
}
static inline bool scte35_splice_time_has_time_specified(const uint8_t *p_splice_time)
{
return !!(p_splice_time[0] & 0x80);
}
static inline void scte35_splice_time_set_time_specified(uint8_t *p_splice_time,
bool b_time_specified)
{
if (b_time_specified)
p_splice_time[0] |= 0x80;
else
p_splice_time[0] &= ~0x80;
}
static inline uint64_t scte35_splice_time_get_pts_time(const uint8_t *p_splice_time)
{
return ((uint64_t)(p_splice_time[0] & 0x1) << 32) |
((uint64_t)p_splice_time[1] << 24) |
((uint64_t)p_splice_time[2] << 16) |
((uint64_t)p_splice_time[3] << 8) |
(uint64_t)p_splice_time[4];
}
static inline void scte35_splice_time_set_pts_time(uint8_t *p_splice_time,
uint64_t i_pts_time)
{
p_splice_time[0] &= ~0x1;
p_splice_time[0] |= (i_pts_time >> 32) & 0x1;
p_splice_time[1] = (i_pts_time >> 24) & 0xff;
p_splice_time[2] = (i_pts_time >> 16) & 0xff;
p_splice_time[3] = (i_pts_time >> 8) & 0xff;
p_splice_time[4] = i_pts_time & 0xff;
}
static inline uint8_t scte35_splice_time_size(const uint8_t *p_splice_time)
{
return SCTE35_SPLICE_TIME_HEADER_SIZE +
(scte35_splice_time_has_time_specified(p_splice_time) ?
SCTE35_SPLICE_TIME_TIME_SIZE : 0);
}
/*****************************************************************************
* Splice Information Table - break_duration structure
*****************************************************************************/
#define SCTE35_BREAK_DURATION_HEADER_SIZE 5
static inline void scte35_break_duration_init(uint8_t *p_break_duration)
{
p_break_duration[0] = 0xff;
}
static inline bool scte35_break_duration_has_auto_return(const uint8_t *p_break_duration)
{
return !!(p_break_duration[0] & 0x80);
}
static inline void scte35_break_duration_set_auto_return(uint8_t *p_break_duration, bool b_auto_return)
{
if (b_auto_return)
p_break_duration[0] |= 0x80;
else
p_break_duration[0] &= ~0x80;
}
static inline uint64_t scte35_break_duration_get_duration(const uint8_t *p_break_duration)
{
return ((uint64_t)(p_break_duration[0] & 0x1) << 32) |
((uint64_t)p_break_duration[1] << 24) |
((uint64_t)p_break_duration[2] << 16) |
((uint64_t)p_break_duration[3] << 8) |
(uint64_t)p_break_duration[4];
}
static inline void scte35_break_duration_set_duration(uint8_t *p_break_duration,
uint64_t i_duration)
{
p_break_duration[0] &= ~0x1;
p_break_duration[0] |= (i_duration >> 32) & 0x1;
p_break_duration[1] = (i_duration >> 24) & 0xff;
p_break_duration[2] = (i_duration >> 16) & 0xff;
p_break_duration[3] = (i_duration >> 8) & 0xff;
p_break_duration[4] = i_duration & 0xff;
}
/*****************************************************************************
* Splice Information Table - null command
*****************************************************************************/
#define SCTE35_NULL_COMMAND 0
#define SCTE35_NULL_HEADER_SIZE 0
static inline void scte35_null_init(uint8_t *p_scte35)
{
scte35_init(p_scte35);
scte35_set_command_type(p_scte35, SCTE35_NULL_COMMAND);
scte35_set_command_length(p_scte35, SCTE35_NULL_HEADER_SIZE);
scte35_set_desclength(p_scte35, 0);
}
static inline bool scte35_null_validate(const uint8_t *p_scte35)
{
return true;
}
/*****************************************************************************
* Splice Information Table - schedule command
*****************************************************************************/
#define SCTE35_SCHEDULE_COMMAND 4
/* TODO Not implemented (useless) */
/*****************************************************************************
* Splice Information Table - insert command
*****************************************************************************/
#define SCTE35_INSERT_COMMAND 5
#define SCTE35_INSERT_HEADER_SIZE 5
#define SCTE35_INSERT_HEADER2_SIZE 1
#define SCTE35_INSERT_COMPONENT_COUNT_SIZE 1
#define SCTE35_INSERT_COMPONENT_HEADER_SIZE 1
#define SCTE35_INSERT_FOOTER_SIZE 4
static inline void scte35_insert_init(uint8_t *p_scte35, uint16_t i_length)
{
scte35_init(p_scte35);
scte35_set_command_type(p_scte35, SCTE35_INSERT_COMMAND);
scte35_set_command_length(p_scte35,
SCTE35_INSERT_HEADER_SIZE + i_length);
scte35_set_desclength(p_scte35, 0);
uint8_t *p_command = scte35_get_command(p_scte35);
p_command[4] = 0xff;
}
static inline uint32_t scte35_insert_get_event_id(const uint8_t *p_scte35)
{
const uint8_t *p_command = scte35_get_command(p_scte35);
return (p_command[0] << 24) | (p_command[1] << 16) |
(p_command[2] << 8) | p_command[3];
}
static inline void scte35_insert_set_event_id(uint8_t *p_scte35,
uint32_t i_event_id)
{
uint8_t *p_command = scte35_get_command(p_scte35);
p_command[0] = (i_event_id >> 24) & 0xff;
p_command[1] = (i_event_id >> 16) & 0xff;
p_command[2] = (i_event_id >> 8) & 0xff;
p_command[3] = i_event_id & 0xff;
}
static inline bool scte35_insert_has_cancel(const uint8_t *p_scte35)
{
const uint8_t *p_command = scte35_get_command(p_scte35);
return !!(p_command[4] & 0x80);
}
static inline void scte35_insert_set_cancel(const uint8_t *p_scte35,
bool b_cancel)
{
uint8_t *p_command = scte35_get_command(p_scte35);
if (b_cancel)
p_command[4] |= 0x80;
else {
p_command[4] &= ~0x80;
p_command[5] = 0xff;
}
}
static inline bool scte35_insert_has_out_of_network(const uint8_t *p_scte35)
{
const uint8_t *p_command = scte35_get_command(p_scte35);
return !!(p_command[5] & 0x80);
}
static inline void scte35_insert_set_out_of_network(const uint8_t *p_scte35,
bool b_out_of_network)
{
uint8_t *p_command = scte35_get_command(p_scte35);
if (b_out_of_network)
p_command[5] |= 0x80;
else
p_command[5] &= ~0x80;
}
static inline bool scte35_insert_has_program_splice(const uint8_t *p_scte35)
{
const uint8_t *p_command = scte35_get_command(p_scte35);
return !!(p_command[5] & 0x40);
}
static inline void scte35_insert_set_program_splice(const uint8_t *p_scte35,
bool b_program_splice)
{
uint8_t *p_command = scte35_get_command(p_scte35);
if (b_program_splice)
p_command[5] |= 0x40;
else
p_command[5] &= ~0x40;
}
static inline bool scte35_insert_has_duration(const uint8_t *p_scte35)
{
const uint8_t *p_command = scte35_get_command(p_scte35);
return !!(p_command[5] & 0x20);
}
static inline void scte35_insert_set_duration(const uint8_t *p_scte35,
bool b_duration)
{
uint8_t *p_command = scte35_get_command(p_scte35);
if (b_duration)
p_command[5] |= 0x20;
else
p_command[5] &= ~0x20;
}
static inline bool scte35_insert_has_splice_immediate(const uint8_t *p_scte35)
{
const uint8_t *p_command = scte35_get_command(p_scte35);
return !!(p_command[5] & 0x10);
}
static inline void scte35_insert_set_splice_immediate(const uint8_t *p_scte35,
bool b_splice_immediate)
{
uint8_t *p_command = scte35_get_command(p_scte35);
if (b_splice_immediate)
p_command[5] |= 0x10;
else
p_command[5] &= ~0x10;
}
static inline uint8_t *scte35_insert_get_splice_time(const uint8_t *p_scte35)
{
uint8_t *p_command = scte35_get_command(p_scte35);
return p_command + SCTE35_INSERT_HEADER_SIZE + SCTE35_INSERT_HEADER2_SIZE;
}
static inline uint8_t scte35_insert_get_component_count(const uint8_t *p_scte35)
{
uint8_t *p_command = scte35_get_command(p_scte35);
return p_command[SCTE35_INSERT_HEADER_SIZE + SCTE35_INSERT_HEADER2_SIZE];
}
static inline void scte35_insert_set_component_count(uint8_t *p_scte35,
uint8_t i_component_count)
{
uint8_t *p_command = scte35_get_command(p_scte35);
p_command[SCTE35_INSERT_HEADER_SIZE + SCTE35_INSERT_HEADER2_SIZE] =
i_component_count;
}
static inline uint8_t scte35_insert_component_get_component_tag(const uint8_t *p_component)
{
return p_component[0];
}
static inline void scte35_insert_component_set_component_tag(uint8_t *p_component, uint8_t i_component_tag)
{
p_component[0] = i_component_tag;
}
static inline uint8_t *scte35_insert_component_get_splice_time(const uint8_t *p_component)
{
return (uint8_t *)p_component + SCTE35_INSERT_COMPONENT_HEADER_SIZE;
}
static inline uint8_t *scte35_insert_get_component(const uint8_t *p_scte35,
uint8_t n)
{
uint16_t i_section_size = psi_get_length(p_scte35) + PSI_HEADER_SIZE
- PSI_CRC_SIZE;
bool b_splice_immediate = scte35_insert_has_splice_immediate(p_scte35);
uint8_t *p_scte35_n = scte35_get_command(p_scte35) +
SCTE35_INSERT_HEADER_SIZE + SCTE35_INSERT_HEADER2_SIZE +
SCTE35_INSERT_COMPONENT_COUNT_SIZE;
if (p_scte35_n - p_scte35 > i_section_size)
return NULL;
while (n) {
if (p_scte35_n + SCTE35_INSERT_COMPONENT_HEADER_SIZE - p_scte35 >
i_section_size)
return NULL;
p_scte35_n += SCTE35_INSERT_COMPONENT_HEADER_SIZE +
(b_splice_immediate ?
scte35_splice_time_size(
scte35_insert_component_get_splice_time(p_scte35_n)) :
0);
n--;
}
if (p_scte35_n - p_scte35 >= i_section_size) return NULL;
return p_scte35_n;
}
static inline uint8_t *scte35_insert_get_break_duration(const uint8_t *p_scte35)
{
if (!scte35_insert_has_program_splice(p_scte35))
return scte35_insert_get_component(p_scte35,
scte35_insert_get_component_count(p_scte35) + 1);
if (scte35_insert_has_splice_immediate(p_scte35))
return scte35_get_command(p_scte35) + SCTE35_INSERT_HEADER_SIZE +
SCTE35_INSERT_HEADER2_SIZE;
uint8_t *p_splice_time = scte35_insert_get_splice_time(p_scte35);
return p_splice_time + scte35_splice_time_size(p_splice_time);
}
static inline uint8_t *scte35_insert_get_footer(const uint8_t *p_scte35)
{
return scte35_insert_get_break_duration(p_scte35) +
(scte35_insert_has_duration(p_scte35) ?
SCTE35_BREAK_DURATION_HEADER_SIZE : 0);
}
static inline uint16_t scte35_insert_get_unique_program_id(const uint8_t *p_scte35)
{
uint8_t *p_footer = scte35_insert_get_footer(p_scte35);
return (p_footer[0] << 8) | p_footer[1];
}
static inline void scte35_insert_set_unique_program_id(uint8_t *p_scte35,
uint16_t i_unique_program_id)
{
uint8_t *p_footer = scte35_insert_get_footer(p_scte35);
p_footer[0] = (i_unique_program_id >> 8) & 0xff;
p_footer[1] = i_unique_program_id & 0xff;
}
static inline uint8_t scte35_insert_get_avail_num(const uint8_t *p_scte35)
{
uint8_t *p_footer = scte35_insert_get_footer(p_scte35);
return p_footer[2];
}
static inline void scte35_insert_set_avail_num(uint8_t *p_scte35,
uint8_t i_avail_num)
{
uint8_t *p_footer = scte35_insert_get_footer(p_scte35);
p_footer[2] = i_avail_num;
}
static inline uint8_t scte35_insert_get_avails_expected(const uint8_t *p_scte35)
{
uint8_t *p_footer = scte35_insert_get_footer(p_scte35);
return p_footer[3];
}
static inline void scte35_insert_set_avails_expected(uint8_t *p_scte35,
uint8_t i_avails_expected)
{
uint8_t *p_footer = scte35_insert_get_footer(p_scte35);
p_footer[3] = i_avails_expected;
}
static inline bool scte35_insert_validate(const uint8_t *p_scte35)
{
size_t i_length = scte35_get_command_length(p_scte35);
if (i_length < SCTE35_INSERT_HEADER_SIZE)
return false;
if (scte35_insert_has_cancel(p_scte35))
return i_length <= SCTE35_INSERT_HEADER_SIZE;
if (i_length < SCTE35_INSERT_HEADER_SIZE + SCTE35_INSERT_HEADER2_SIZE)
return false;
if (scte35_insert_has_program_splice(p_scte35)) {
if (scte35_insert_has_splice_immediate(p_scte35)) {
if (scte35_insert_has_duration(p_scte35))
return i_length >= SCTE35_INSERT_HEADER_SIZE +
SCTE35_INSERT_HEADER2_SIZE +
SCTE35_BREAK_DURATION_HEADER_SIZE +
SCTE35_INSERT_FOOTER_SIZE;
return i_length >= SCTE35_INSERT_HEADER_SIZE +
SCTE35_INSERT_HEADER2_SIZE +
SCTE35_INSERT_FOOTER_SIZE;
}
if (i_length < SCTE35_INSERT_HEADER_SIZE + SCTE35_INSERT_HEADER2_SIZE +
SCTE35_SPLICE_TIME_HEADER_SIZE ||
i_length < SCTE35_INSERT_HEADER_SIZE + SCTE35_INSERT_HEADER2_SIZE +
scte35_splice_time_size(
scte35_insert_get_splice_time(p_scte35)))
return false;
if (scte35_insert_has_duration(p_scte35))
return i_length >= SCTE35_INSERT_HEADER_SIZE +
SCTE35_INSERT_HEADER2_SIZE +
scte35_splice_time_size(scte35_insert_get_splice_time(p_scte35))
+ SCTE35_BREAK_DURATION_HEADER_SIZE +
SCTE35_INSERT_FOOTER_SIZE;
return i_length >= SCTE35_INSERT_HEADER_SIZE +
SCTE35_INSERT_HEADER2_SIZE +
scte35_splice_time_size(scte35_insert_get_splice_time(p_scte35))
+ SCTE35_INSERT_FOOTER_SIZE;
}
if (i_length < SCTE35_INSERT_HEADER_SIZE + SCTE35_INSERT_HEADER2_SIZE +
SCTE35_INSERT_COMPONENT_COUNT_SIZE)
return false;
const uint8_t *p_command = scte35_get_command(p_scte35);
const uint8_t *p_end = scte35_insert_get_component(p_scte35,
scte35_insert_get_component_count(p_scte35) + 1);
if (p_end == NULL)
return false;
if (scte35_insert_has_duration(p_scte35))
return i_length >= p_end + SCTE35_BREAK_DURATION_HEADER_SIZE +
SCTE35_INSERT_FOOTER_SIZE - p_command;
return i_length >= p_end + SCTE35_INSERT_FOOTER_SIZE - p_command;
}
/*****************************************************************************
* Splice Information Table - time_signal command
*****************************************************************************/
#define SCTE35_TIME_SIGNAL_COMMAND 6
#define SCTE35_TIME_SIGNAL_HEADER_SIZE SCTE35_SPLICE_TIME_HEADER_SIZE
#define SCTE35_TIME_SIGNAL_TIME_SIZE SCTE35_SPLICE_TIME_TIME_SIZE
static inline void scte35_time_signal_init(uint8_t *p_scte35, uint16_t i_length)
{
scte35_init(p_scte35);
scte35_set_command_type(p_scte35, SCTE35_TIME_SIGNAL_COMMAND);
scte35_set_command_length(p_scte35,
SCTE35_TIME_SIGNAL_HEADER_SIZE + i_length);
scte35_set_desclength(p_scte35, 0);
}
static inline uint8_t *scte35_time_signal_get_splice_time(const uint8_t *p_scte35)
{
return scte35_get_command(p_scte35);
}
static inline bool scte35_time_signal_validate(const uint8_t *p_scte35)
{
return scte35_get_command_length(p_scte35) >=
scte35_splice_time_size(scte35_time_signal_get_splice_time(p_scte35));
}
/*****************************************************************************
* Splice Information Table - bandwidth_reservation command
*****************************************************************************/
#define SCTE35_BANDWIDTH_RESERVATION_COMMAND 7
#define SCTE35_BANDWIDTH_RESERVATION_HEADER_SIZE 0
static inline void scte35_bandwidth_reservation_init(uint8_t *p_scte35)
{
scte35_init(p_scte35);
scte35_set_command_type(p_scte35, SCTE35_BANDWIDTH_RESERVATION_COMMAND);
scte35_set_command_length(p_scte35,
SCTE35_BANDWIDTH_RESERVATION_HEADER_SIZE);
scte35_set_desclength(p_scte35, 0);
}
static inline bool scte35_bandwidth_reservation_validate(const uint8_t *p_scte35)
{
return true;
}
/*****************************************************************************
* Splice Information Table - private command
*****************************************************************************/
#define SCTE35_PRIVATE_COMMAND 0xff
#define SCTE35_PRIVATE_HEADER_SIZE 4
static inline void scte35_private_init(uint8_t *p_scte35, uint16_t i_length)
{
scte35_init(p_scte35);
scte35_set_command_type(p_scte35, SCTE35_PRIVATE_COMMAND);
scte35_set_command_length(p_scte35,
SCTE35_PRIVATE_HEADER_SIZE + i_length);
scte35_set_desclength(p_scte35, 0);
}
static inline uint32_t scte35_private_get_identifier(const uint8_t *p_scte35)
{
const uint8_t *p_command = scte35_get_command(p_scte35);
return (p_command[0] << 24) | (p_command[1] << 16) |
(p_command[2] << 8) | p_command[3];
}
static inline void scte35_private_set_identifier(uint8_t *p_scte35,
uint32_t i_identifier)
{
uint8_t *p_command = scte35_get_command(p_scte35);
p_command[0] = (i_identifier >> 24) & 0xff;
p_command[1] = (i_identifier >> 16) & 0xff;
p_command[2] = (i_identifier >> 8) & 0xff;
p_command[3] = i_identifier & 0xff;
}
static inline bool scte35_private_validate(const uint8_t *p_scte35)
{
return scte35_get_command_length(p_scte35) >= SCTE35_PRIVATE_HEADER_SIZE;
}
/*****************************************************************************
* Splice Information Table validation
*****************************************************************************/
static inline bool scte35_validate(const uint8_t *p_scte35)
{
if (psi_get_syntax(p_scte35) ||
psi_get_tableid(p_scte35) != SCTE35_TABLE_ID)
return false;
if (!psi_check_crc(p_scte35))
return false;
if (scte35_get_protocol(p_scte35))
return false;
uint16_t i_section_size = psi_get_length(p_scte35) + PSI_HEADER_SIZE
- PSI_CRC_SIZE;
if (i_section_size < SCTE35_HEADER_SIZE)
return false;
uint16_t i_command_length = scte35_get_command_length(p_scte35);
if (i_command_length != 0xfff &&
(i_section_size < SCTE35_HEADER_SIZE + i_command_length +
SCTE35_HEADER2_SIZE ||
i_section_size < SCTE35_HEADER_SIZE + i_command_length +
SCTE35_HEADER2_SIZE +
scte35_get_desclength(p_scte35)))
return false;
switch (scte35_get_command_type(p_scte35)) {
case SCTE35_NULL_COMMAND:
if (!scte35_null_validate(p_scte35))
return false;
break;
case SCTE35_INSERT_COMMAND:
if (!scte35_insert_validate(p_scte35))
return false;
break;
case SCTE35_TIME_SIGNAL_COMMAND:
if (!scte35_time_signal_validate(p_scte35))
return false;
break;
case SCTE35_BANDWIDTH_RESERVATION_COMMAND:
if (!scte35_bandwidth_reservation_validate(p_scte35))
return false;
break;
case SCTE35_PRIVATE_COMMAND:
if (!scte35_private_validate(p_scte35))
return false;
break;
default:
break;
}
if (i_command_length != 0xfff &&
!descl_validate(scte35_get_descl(p_scte35),
scte35_get_desclength(p_scte35)))
return false;
return true;
}
#ifdef __cplusplus
}
#endif
#endif