mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-04 23:48:25 -05:00
157 lines
5.9 KiB
C
Executable File
157 lines
5.9 KiB
C
Executable File
/*
|
|
* MJPEG encoder and decoder
|
|
* Copyright (c) 2000, 2001 Fabrice Bellard
|
|
* Copyright (c) 2003 Alex Beregszaszi
|
|
* Copyright (c) 2003-2004 Michael Niedermayer
|
|
*
|
|
* Support for external huffman table, various fixes (AVID workaround),
|
|
* aspecting, new decode_frame mechanism and apple mjpeg-b support
|
|
* by Alex Beregszaszi
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* MJPEG encoder and decoder.
|
|
*/
|
|
|
|
#include "jpegtables.h"
|
|
|
|
|
|
#if 0
|
|
/* These are the sample quantization tables given in JPEG spec section K.1.
|
|
* The spec says that the values given produce "good" quality, and
|
|
* when divided by 2, "very good" quality.
|
|
*/
|
|
static const unsigned char std_luminance_quant_tbl[64] = {
|
|
16, 11, 10, 16, 24, 40, 51, 61,
|
|
12, 12, 14, 19, 26, 58, 60, 55,
|
|
14, 13, 16, 24, 40, 57, 69, 56,
|
|
14, 17, 22, 29, 51, 87, 80, 62,
|
|
18, 22, 37, 56, 68, 109, 103, 77,
|
|
24, 35, 55, 64, 81, 104, 113, 92,
|
|
49, 64, 78, 87, 103, 121, 120, 101,
|
|
72, 92, 95, 98, 112, 100, 103, 99
|
|
};
|
|
static const unsigned char std_chrominance_quant_tbl[64] = {
|
|
17, 18, 24, 47, 99, 99, 99, 99,
|
|
18, 21, 26, 66, 99, 99, 99, 99,
|
|
24, 26, 56, 99, 99, 99, 99, 99,
|
|
47, 66, 99, 99, 99, 99, 99, 99,
|
|
99, 99, 99, 99, 99, 99, 99, 99,
|
|
99, 99, 99, 99, 99, 99, 99, 99,
|
|
99, 99, 99, 99, 99, 99, 99, 99,
|
|
99, 99, 99, 99, 99, 99, 99, 99
|
|
};
|
|
#endif
|
|
|
|
/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
|
|
/* IMPORTANT: these are only valid for 8-bit data precision! */
|
|
const uint8_t avpriv_mjpeg_bits_dc_luminance[17] =
|
|
{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
|
|
const uint8_t avpriv_mjpeg_val_dc[12] =
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
|
|
|
|
const uint8_t avpriv_mjpeg_bits_dc_chrominance[17] =
|
|
{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
|
|
|
|
const uint8_t avpriv_mjpeg_bits_ac_luminance[17] =
|
|
{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
|
|
const uint8_t avpriv_mjpeg_val_ac_luminance[] =
|
|
{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
|
|
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
|
|
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
|
|
0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
|
|
0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
|
|
0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
|
|
0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
|
|
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
|
|
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
|
|
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
|
|
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
|
|
0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
|
|
0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
|
|
0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
|
|
0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
|
|
0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
|
|
0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
|
|
0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
|
|
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
|
|
0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
|
|
0xf9, 0xfa
|
|
};
|
|
|
|
const uint8_t avpriv_mjpeg_bits_ac_chrominance[17] =
|
|
{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
|
|
|
|
const uint8_t avpriv_mjpeg_val_ac_chrominance[] =
|
|
{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
|
|
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
|
|
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
|
|
0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
|
|
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
|
|
0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
|
|
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
|
|
0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
|
|
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
|
|
0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
|
|
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
|
|
0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
|
|
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
|
|
0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
|
|
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
|
|
0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
|
|
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
|
|
0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
|
|
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
|
|
0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
|
|
0xf9, 0xfa
|
|
};
|
|
|
|
/* isn't this function nicer than the one in the libjpeg ? */
|
|
void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
|
|
const uint8_t *bits_table,
|
|
const uint8_t *val_table)
|
|
{
|
|
int i, j, k,nb, code, sym;
|
|
|
|
/* Some badly encoded files [1] map 2 different codes to symbol 0.
|
|
Only the first one is valid, so we zero-initialize this here and
|
|
make sure we only set it once (the first time) in the loop below.
|
|
|
|
[1]: Embedded JPEGs in "X7 RAW" and "X7 CinemaDNG" samples here:
|
|
https://www.dji.com/gr/zenmuse-x7/info#downloads
|
|
*/
|
|
huff_size[0] = 0;
|
|
|
|
k = 0;
|
|
code = 0;
|
|
for(i=1;i<=16;i++) {
|
|
nb = bits_table[i];
|
|
for(j=0;j<nb;j++) {
|
|
sym = val_table[k++];
|
|
if (sym != 0 || huff_size[sym] == 0) { /* see comment above */
|
|
huff_size[sym] = i;
|
|
huff_code[sym] = code;
|
|
}
|
|
code++;
|
|
}
|
|
code <<= 1;
|
|
}
|
|
}
|