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.
133 lines
4.3 KiB
133 lines
4.3 KiB
/*****************************************************************************
|
|
* rfc4175.h: RFC Profile for uncompressed video
|
|
*****************************************************************************
|
|
* Copyright (C) 2016 Open Broadcast Systems Ltd.
|
|
*
|
|
* Authors: Rostislav Pehlivanov <rpehlivanov@obe.tv>
|
|
*
|
|
* 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:
|
|
* - IETF RFC 4175 Uncompressed
|
|
*/
|
|
|
|
#ifndef __BITSTREAM_IETF_RFC4175_H__
|
|
#define __BITSTREAM_IETF_RFC4175_H__
|
|
|
|
#include <stdint.h> /* uint8_t, uint16_t, etc... */
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
#define RFC_4175_EXT_SEQ_NUM_LEN 2
|
|
#define RFC_4175_HEADER_LEN 6 /* Note: extended sequence number not included */
|
|
|
|
/* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Extended Sequence Number | Length |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* |F| Line No |C| Offset |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Length |F| Line No |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* |C| Offset | .
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ .
|
|
* . .
|
|
* . Two (partial) lines of video data .
|
|
* . .
|
|
* +---------------------------------------------------------------+
|
|
*/
|
|
|
|
|
|
static inline void rfc4175_set_extended_sequence_number(uint8_t *buf, uint16_t number)
|
|
{
|
|
buf[0] = (number >> 8) & 0xff;
|
|
buf[1] = number & 0xff;
|
|
}
|
|
|
|
static inline uint16_t rfc4175_get_extended_sequence_number(const uint8_t *buf)
|
|
{
|
|
return (buf[0] << 8) | buf[1];
|
|
}
|
|
|
|
static inline void rfc4175_set_line_length(uint8_t *buf, uint16_t length)
|
|
{
|
|
buf[0] = (length >> 8) & 0xff;
|
|
buf[1] = length & 0xff;
|
|
}
|
|
|
|
static inline uint16_t rfc4175_get_line_length(const uint8_t *buf)
|
|
{
|
|
return (buf[0] << 8) | buf[1];
|
|
}
|
|
|
|
static inline void rfc4175_set_line_field_id(uint8_t *buf, uint8_t id)
|
|
{
|
|
buf[2] |= (!!id) << 7;
|
|
}
|
|
|
|
static inline uint8_t rfc4175_get_line_field_id(const uint8_t *buf)
|
|
{
|
|
return buf[2] >> 7;
|
|
}
|
|
|
|
static inline void rfc4175_set_line_number(uint8_t *buf, uint16_t number)
|
|
{
|
|
buf[2] |= (number >> 8) & 0x7f;
|
|
buf[3] = number & 0xff;
|
|
}
|
|
|
|
static inline uint16_t rfc4175_get_line_number(const uint8_t *buf)
|
|
{
|
|
return ((buf[2] & 0x7f) << 8) | buf[3];
|
|
}
|
|
|
|
static inline void rfc4175_set_line_continuation(uint8_t *buf, uint8_t continuation)
|
|
{
|
|
buf[4] |= (!!continuation) << 7;
|
|
}
|
|
|
|
static inline uint8_t rfc4175_get_line_continuation(const uint8_t *buf)
|
|
{
|
|
return buf[4] >> 7;
|
|
}
|
|
|
|
static inline void rfc4175_set_line_offset(uint8_t *buf, uint16_t offset)
|
|
{
|
|
buf[4] |= (offset >> 8) & 0x7f;
|
|
buf[5] = offset & 0xff;
|
|
}
|
|
|
|
static inline uint16_t rfc4175_get_line_offset(const uint8_t *buf)
|
|
{
|
|
return ((buf[4] & 0x7f) << 8) | buf[5];
|
|
}
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|