mirror of
https://github.com/ultravideo/uvg266.git
synced 2024-11-24 10:34:05 +00:00
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/*****************************************************************************
|
|
* This file is part of Kvazaar HEVC encoder.
|
|
*
|
|
* Copyright (C) 2013-2015 Tampere University of Technology and others (see
|
|
* COPYING file).
|
|
*
|
|
* Kvazaar is free software: you can redistribute it and/or modify it under
|
|
* the terms of the GNU Lesser General Public License as published by the
|
|
* Free Software Foundation; either version 2.1 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* Kvazaar is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with Kvazaar. If not, see <http://www.gnu.org/licenses/>.
|
|
****************************************************************************/
|
|
|
|
/*
|
|
* \file
|
|
*/
|
|
|
|
#include "nal.h"
|
|
#include "strategyselector.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#include "config.h"
|
|
#include "bitstream.h"
|
|
#include "cabac.h"
|
|
#include "encoder.h"
|
|
|
|
/**
|
|
* \brief Write a Network Abstraction Layer (NAL) packet to the output.
|
|
*/
|
|
void nal_write(bitstream_t * const bitstream, const uint8_t nal_type,
|
|
const uint8_t temporal_id, const int long_start_code)
|
|
{
|
|
uint8_t byte;
|
|
|
|
// Some useful constants
|
|
const uint8_t start_code_prefix_one_3bytes = 0x01;
|
|
const uint8_t zero = 0x00;
|
|
|
|
// zero_byte (0x00) shall be present in the byte stream NALU of VPS, SPS
|
|
// and PPS, or the first NALU of an access unit
|
|
if(long_start_code)
|
|
bitstream_writebyte(bitstream, zero);
|
|
|
|
// start_code_prefix_one_3bytes
|
|
bitstream_writebyte(bitstream, zero);
|
|
bitstream_writebyte(bitstream, zero);
|
|
bitstream_writebyte(bitstream, start_code_prefix_one_3bytes);
|
|
|
|
// Handle header bits with full bytes instead of using bitstream
|
|
// forbidden_zero_flag(1) + nal_unit_type(6) + 1bit of nuh_layer_id
|
|
byte = nal_type << 1;
|
|
bitstream_writebyte(bitstream, byte);
|
|
|
|
// 5bits of nuh_layer_id + nuh_temporal_id_plus1(3)
|
|
byte = (temporal_id + 1) & 7;
|
|
bitstream_writebyte(bitstream, byte);
|
|
}
|
|
|
|
/*!
|
|
\brief Calculate checksums for all colors of the picture.
|
|
\param im The image that checksum is calculated for.
|
|
\param checksum_out Result of the calculation.
|
|
\returns Void
|
|
*/
|
|
void image_checksum(const image* im, unsigned char checksum_out[][SEI_HASH_MAX_LENGTH])
|
|
{
|
|
array_checksum(im->y, im->height, im->width, im->width, checksum_out[0]);
|
|
|
|
/* The number of chroma pixels is half that of luma. */
|
|
array_checksum(im->u, im->height >> 1, im->width >> 1, im->width >> 1, checksum_out[1]);
|
|
array_checksum(im->v, im->height >> 1, im->width >> 1, im->width >> 1, checksum_out[2]);
|
|
}
|