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.
283 lines
9.3 KiB
283 lines
9.3 KiB
/*****************************************************************************
|
|
* desc_21.h: ISO/IEC 13818-1 Descriptor 0x21 (Muxcode descriptor)
|
|
*****************************************************************************
|
|
* Copyright (C) 2021 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:
|
|
* - ISO/IEC 13818-1:2007(E) (MPEG-2 Systems)
|
|
* - ISO/IEC 14496-1:2001(E) (MPEG-4 Systems)
|
|
*/
|
|
|
|
#ifndef __BITSTREAM_MPEG_DESC_21_H__
|
|
#define __BITSTREAM_MPEG_DESC_21_H__
|
|
|
|
#include <bitstream/common.h>
|
|
#include <bitstream/mpeg/psi/descriptors.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/*****************************************************************************
|
|
* Descriptor 0x21: Muxcode descriptor
|
|
*****************************************************************************/
|
|
#define DESC21_HEADER_SIZE DESC_HEADER_SIZE
|
|
#define DESC21_ENTRY_HEADER_SIZE 3
|
|
#define DESC21_SUBSTRUCT_HEADER_SIZE 1
|
|
|
|
static inline void desc21_init(uint8_t *p_desc)
|
|
{
|
|
desc_set_tag(p_desc, 0x21);
|
|
}
|
|
|
|
static inline uint8_t desc21n_get_length(const uint8_t *p_desc_n)
|
|
{
|
|
return p_desc_n[0];
|
|
}
|
|
|
|
static inline void desc21n_set_length(uint8_t *p_desc_n, uint8_t i_length)
|
|
{
|
|
p_desc_n[0] = i_length;
|
|
}
|
|
|
|
static inline uint8_t desc21n_get_muxcode(const uint8_t *p_desc_n)
|
|
{
|
|
return (p_desc_n[1] & 0xf0) >> 4;
|
|
}
|
|
|
|
static inline void desc21n_set_muxcode(uint8_t *p_desc_n, uint8_t i_muxcode)
|
|
{
|
|
p_desc_n[1] = (i_muxcode << 4) | (p_desc_n[1] & 0x0f);
|
|
}
|
|
|
|
static inline uint8_t desc21n_get_version(const uint8_t *p_desc_n)
|
|
{
|
|
return p_desc_n[1] & 0x0f;
|
|
}
|
|
|
|
static inline void desc21n_set_version(uint8_t *p_desc_n, uint8_t i_version)
|
|
{
|
|
p_desc_n[1] = (p_desc_n[1] & 0xf0) | (i_version & 0x0f);
|
|
}
|
|
|
|
static inline uint8_t desc21n_get_substruct_count(const uint8_t *p_desc_n)
|
|
{
|
|
return p_desc_n[2];
|
|
}
|
|
|
|
static inline void desc21n_set_substruct_count(uint8_t *p_desc_n, uint8_t i_substruct_count)
|
|
{
|
|
p_desc_n[2] = i_substruct_count;
|
|
}
|
|
|
|
static inline uint8_t *desc21_get_entry(const uint8_t *p_desc, uint8_t n)
|
|
{
|
|
const uint8_t *p_desc_n = p_desc + DESC21_HEADER_SIZE;
|
|
uint8_t i_desc_size = desc_get_length(p_desc);
|
|
|
|
while (n) {
|
|
if (p_desc_n + desc21n_get_length(p_desc_n) - p_desc > i_desc_size)
|
|
return NULL;
|
|
p_desc_n += 1 + desc21n_get_length(p_desc_n);
|
|
n--;
|
|
}
|
|
if (p_desc_n - p_desc > i_desc_size)
|
|
return NULL;
|
|
return (uint8_t *)p_desc_n;
|
|
}
|
|
|
|
static inline uint8_t desc21k_get_slot_count(const uint8_t *p_desc_k)
|
|
{
|
|
return p_desc_k[0] >> 3;
|
|
}
|
|
|
|
static inline void desc21k_set_slot_count(uint8_t *p_desc_k, uint8_t i_slot_count)
|
|
{
|
|
p_desc_k[0] = (i_slot_count << 3) | (p_desc_k[0] & 0x07);
|
|
}
|
|
|
|
static inline uint8_t desc21k_get_repetition_count(const uint8_t *p_desc_k)
|
|
{
|
|
return p_desc_k[0] & 0x07;
|
|
}
|
|
|
|
static inline void desc21k_set_repetition_count(uint8_t *p_desc_k, uint8_t i_repetition_count)
|
|
{
|
|
p_desc_k[0] = (p_desc_k[0] & 0xf8) | (i_repetition_count & 0x07);
|
|
}
|
|
|
|
static inline uint8_t desc21k_get_flex_mux_channel(const uint8_t *p_desc_k, uint8_t i_index)
|
|
{
|
|
return p_desc_k[DESC21_SUBSTRUCT_HEADER_SIZE + i_index * 2];
|
|
}
|
|
|
|
static inline void desc21k_set_flex_mux_channel(uint8_t *p_desc_k, uint8_t i_index, uint8_t i_flex_mux_channel)
|
|
{
|
|
p_desc_k[DESC21_SUBSTRUCT_HEADER_SIZE + i_index * 2] = i_flex_mux_channel;
|
|
}
|
|
|
|
static inline uint8_t desc21k_get_number_of_bytes(const uint8_t *p_desc_k, uint8_t i_index)
|
|
{
|
|
return p_desc_k[DESC21_SUBSTRUCT_HEADER_SIZE + i_index * 2 + 1];
|
|
}
|
|
|
|
static inline void desc21k_set_number_of_bytes(uint8_t *p_desc_k, uint8_t i_index, uint8_t i_number_of_bytes)
|
|
{
|
|
p_desc_k[DESC21_SUBSTRUCT_HEADER_SIZE + i_index * 2 + 1] = i_number_of_bytes;
|
|
}
|
|
|
|
static inline uint8_t *desc21n_get_substruct(const uint8_t *p_desc_n, uint8_t k)
|
|
{
|
|
const uint8_t *p_desc_k = p_desc_n + DESC21_ENTRY_HEADER_SIZE;
|
|
uint8_t i_entry_size = desc21n_get_length(p_desc_n);
|
|
|
|
if (desc21n_get_substruct_count(p_desc_n) == 0)
|
|
return NULL;
|
|
|
|
if (k > desc21n_get_substruct_count(p_desc_n) - 1)
|
|
return NULL;
|
|
|
|
while (k) {
|
|
if (p_desc_k - p_desc_n > i_entry_size)
|
|
return NULL;
|
|
p_desc_k += DESC21_SUBSTRUCT_HEADER_SIZE + (2 * desc21k_get_slot_count(p_desc_k));
|
|
k--;
|
|
}
|
|
if (p_desc_n - p_desc_k > i_entry_size)
|
|
return NULL;
|
|
return (uint8_t *)p_desc_k;
|
|
}
|
|
|
|
static inline bool desc21_validate(const uint8_t *p_desc)
|
|
{
|
|
uint8_t j = 0;
|
|
uint8_t *p_desc_n;
|
|
int i_desc_length = desc_get_length(p_desc);
|
|
while ((p_desc_n = desc21_get_entry(p_desc, j++)) != NULL) {
|
|
int i_calc_entry_length = DESC21_ENTRY_HEADER_SIZE - 1;
|
|
uint8_t *p_desc_k;
|
|
uint8_t k = 0;
|
|
while ((p_desc_k = desc21n_get_substruct(p_desc_n, k++)) != NULL) {
|
|
i_calc_entry_length += DESC21_SUBSTRUCT_HEADER_SIZE + (2 * desc21k_get_slot_count(p_desc_k));
|
|
}
|
|
if (i_calc_entry_length != desc21n_get_length(p_desc_n))
|
|
return false;
|
|
i_desc_length -= desc21n_get_length(p_desc_n);
|
|
}
|
|
return i_desc_length >= 0;
|
|
}
|
|
|
|
static inline void desc21_print(const uint8_t *p_desc, f_print pf_print,
|
|
void *opaque, print_type_t i_print_type)
|
|
{
|
|
const uint8_t *p_desc_n;
|
|
uint8_t n = 0;
|
|
|
|
switch (i_print_type) {
|
|
case PRINT_XML:
|
|
pf_print(opaque, "<MUXCODE_DESC>");
|
|
break;
|
|
default:
|
|
pf_print(opaque, " - desc 21 muxcode");
|
|
}
|
|
|
|
while ((p_desc_n = desc21_get_entry(p_desc, n++)) != NULL) {
|
|
const uint8_t *p_desc_k;
|
|
uint8_t k = 0;
|
|
|
|
switch (i_print_type) {
|
|
case PRINT_XML:
|
|
pf_print(opaque,
|
|
"<MUXCODE_ENTRY length=\"%u\" muxcode=\"%u\""
|
|
" version=\"%u\" substruct_count=\"%u\">",
|
|
desc21n_get_length(p_desc_n),
|
|
desc21n_get_muxcode(p_desc_n),
|
|
desc21n_get_version(p_desc_n),
|
|
desc21n_get_substruct_count(p_desc_n)
|
|
);
|
|
break;
|
|
default:
|
|
pf_print(opaque,
|
|
" - muxcode_entry length=%u muxcode=%u"
|
|
" version=%u substruct_count=%u",
|
|
desc21n_get_length(p_desc_n),
|
|
desc21n_get_muxcode(p_desc_n),
|
|
desc21n_get_version(p_desc_n),
|
|
desc21n_get_substruct_count(p_desc_n)
|
|
);
|
|
}
|
|
|
|
while ((p_desc_k = desc21n_get_substruct(p_desc_n, k++)) != NULL) {
|
|
uint8_t i_slot_count = desc21k_get_slot_count(p_desc_k);
|
|
uint8_t i_repetition_count = desc21k_get_repetition_count(p_desc_k);
|
|
uint8_t r;
|
|
|
|
switch (i_print_type) {
|
|
case PRINT_XML:
|
|
pf_print(opaque,
|
|
"<MUXCODE_SUBSTRUCT slot_count=\"%u\" repetition_count=\"%u\">",
|
|
i_slot_count, i_repetition_count);
|
|
break;
|
|
default:
|
|
pf_print(opaque,
|
|
" - muxcode_substruct slot_count=%u repetition_count=%u",
|
|
i_slot_count, i_repetition_count);
|
|
}
|
|
|
|
for (r = 0; r < i_slot_count; r++) {
|
|
uint8_t i_flex_mux_channel = desc21k_get_flex_mux_channel(p_desc_k, r);
|
|
uint8_t i_number_of_bytes = desc21k_get_number_of_bytes(p_desc_k, r);
|
|
switch (i_print_type) {
|
|
case PRINT_XML:
|
|
pf_print(opaque,
|
|
"<MUXCODE_SUBSTRUCT_ENTRY slot=\"%u\" flex_mux_channel=\"%u\" number_of_bytes=\"%u\"/>",
|
|
r, i_flex_mux_channel, i_number_of_bytes);
|
|
break;
|
|
default:
|
|
pf_print(opaque,
|
|
" - muxcode_substruct_entry slot=%u flex_mux_channel=%u number_of_bytes=%u",
|
|
r, i_flex_mux_channel, i_number_of_bytes);
|
|
}
|
|
}
|
|
|
|
if (i_print_type == PRINT_XML)
|
|
pf_print(opaque, "</MUXCODE_SUBSTRUCT>");
|
|
}
|
|
|
|
if (i_print_type == PRINT_XML)
|
|
pf_print(opaque, "</MUXCODE_ENTRY>");
|
|
}
|
|
|
|
if (i_print_type == PRINT_XML)
|
|
pf_print(opaque, "</MUXCODE_DESC>");
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|