mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
211200e0c0
Approved-by: Stefano Sabatini <stefasab@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
387 lines
13 KiB
C
387 lines
13 KiB
C
/*
|
|
* Copyright (c) 1990 James Ashton - Sydney University
|
|
* Copyright (c) 2012 Stefano Sabatini
|
|
*
|
|
* 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
|
|
* X-Face common data and utilities definition.
|
|
*/
|
|
|
|
#include "libavutil/avassert.h"
|
|
|
|
#include "xface.h"
|
|
|
|
void ff_big_add(BigInt *b, uint8_t a)
|
|
{
|
|
int i;
|
|
uint8_t *w;
|
|
uint16_t c;
|
|
|
|
a &= XFACE_WORDMASK;
|
|
if (a == 0)
|
|
return;
|
|
w = b->words;
|
|
c = a;
|
|
for (i = 0; i < b->nb_words && c; i++) {
|
|
c += *w;
|
|
*w++ = c & XFACE_WORDMASK;
|
|
c >>= XFACE_BITSPERWORD;
|
|
}
|
|
if (i == b->nb_words && c) {
|
|
av_assert0(b->nb_words < XFACE_MAX_WORDS);
|
|
b->nb_words++;
|
|
*w = c & XFACE_WORDMASK;
|
|
}
|
|
}
|
|
|
|
void ff_big_div(BigInt *b, uint8_t a, uint8_t *r)
|
|
{
|
|
int i;
|
|
uint8_t *w;
|
|
uint16_t c, d;
|
|
|
|
a &= XFACE_WORDMASK;
|
|
if (a == 1 || b->nb_words == 0) {
|
|
*r = 0;
|
|
return;
|
|
}
|
|
|
|
/* treat this as a == WORDCARRY and just shift everything right a WORD */
|
|
if (a == 0) {
|
|
i = --b->nb_words;
|
|
w = b->words;
|
|
*r = *w;
|
|
while (i--) {
|
|
*w = *(w + 1);
|
|
w++;
|
|
}
|
|
*w = 0;
|
|
return;
|
|
}
|
|
i = b->nb_words;
|
|
w = b->words + i;
|
|
c = 0;
|
|
while (i--) {
|
|
c <<= XFACE_BITSPERWORD;
|
|
c += *--w;
|
|
d = c / (uint16_t)a;
|
|
c = c % (uint16_t)a;
|
|
*w = d & XFACE_WORDMASK;
|
|
}
|
|
*r = c;
|
|
if (b->words[b->nb_words - 1] == 0)
|
|
b->nb_words--;
|
|
}
|
|
|
|
void ff_big_mul(BigInt *b, uint8_t a)
|
|
{
|
|
int i;
|
|
uint8_t *w;
|
|
uint16_t c;
|
|
|
|
a &= XFACE_WORDMASK;
|
|
if (a == 1 || b->nb_words == 0)
|
|
return;
|
|
if (a == 0) {
|
|
/* treat this as a == WORDCARRY and just shift everything left a WORD */
|
|
av_assert0(b->nb_words < XFACE_MAX_WORDS);
|
|
i = b->nb_words++;
|
|
w = b->words + i;
|
|
while (i--) {
|
|
*w = *(w - 1);
|
|
w--;
|
|
}
|
|
*w = 0;
|
|
return;
|
|
}
|
|
i = b->nb_words;
|
|
w = b->words;
|
|
c = 0;
|
|
while (i--) {
|
|
c += (uint16_t)*w * (uint16_t)a;
|
|
*(w++) = c & XFACE_WORDMASK;
|
|
c >>= XFACE_BITSPERWORD;
|
|
}
|
|
if (c) {
|
|
av_assert0(b->nb_words < XFACE_MAX_WORDS);
|
|
b->nb_words++;
|
|
*w = c & XFACE_WORDMASK;
|
|
}
|
|
}
|
|
|
|
const ProbRange ff_xface_probranges_per_level[4][3] = {
|
|
// black grey white
|
|
{ { 1, 255}, {251, 0}, { 4, 251} }, /* Top of tree almost always grey */
|
|
{ { 1, 255}, {200, 0}, { 55, 200} },
|
|
{ { 33, 223}, {159, 0}, { 64, 159} },
|
|
{ {131, 0}, { 0, 0}, {125, 131} }, /* Grey disallowed at bottom */
|
|
};
|
|
|
|
const ProbRange ff_xface_probranges_2x2[16] = {
|
|
{ 0, 0}, {38, 0}, {38, 38}, {13, 152},
|
|
{38, 76}, {13, 165}, {13, 178}, { 6, 230},
|
|
{38, 114}, {13, 191}, {13, 204}, { 6, 236},
|
|
{13, 217}, { 6, 242}, { 5, 248}, { 3, 253},
|
|
};
|
|
|
|
/*
|
|
* The "guess the next pixel" tables follow. Normally there are 12
|
|
* neighbour pixels used to give 1<<12 cases as we get closer to the
|
|
* upper left corner lesser numbers of neighbours are available.
|
|
*
|
|
* Each byte in the tables represents 8 boolean values starting from
|
|
* the most significant bit.
|
|
*/
|
|
|
|
static const uint8_t g_00[] = {
|
|
0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0xe3, 0xdf, 0x05, 0x17,
|
|
0x05, 0x0f, 0x00, 0x1b, 0x0f, 0xdf, 0x00, 0x04, 0x00, 0x00,
|
|
0x0d, 0x0f, 0x03, 0x7f, 0x00, 0x00, 0x00, 0x01, 0x00, 0x1d,
|
|
0x45, 0x2f, 0x00, 0x00, 0x00, 0x0d, 0x00, 0x0a, 0xff, 0xff,
|
|
0x00, 0x04, 0x00, 0x05, 0x01, 0x3f, 0xcf, 0xff, 0x10, 0x01,
|
|
0x80, 0xc9, 0x0f, 0x0f, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
|
|
0x1b, 0x1f, 0xff, 0xff, 0x4f, 0x54, 0x07, 0x1f, 0x57, 0x47,
|
|
0xd7, 0x3d, 0xff, 0xff, 0x5f, 0x1f, 0x7f, 0xff, 0x7f, 0x7f,
|
|
0x05, 0x0f, 0x01, 0x0f, 0x0f, 0x5f, 0x9b, 0xdf, 0x7f, 0xff,
|
|
0x5f, 0x1d, 0x5f, 0xff, 0x0f, 0x1f, 0x0f, 0x5f, 0x03, 0x1f,
|
|
0x4f, 0x5f, 0xf7, 0x7f, 0x7f, 0xff, 0x0d, 0x0f, 0xfb, 0xff,
|
|
0xf7, 0xbf, 0x0f, 0x4f, 0xd7, 0x3f, 0x4f, 0x7f, 0xff, 0xff,
|
|
0x67, 0xbf, 0x56, 0x25, 0x1f, 0x7f, 0x9f, 0xff, 0x00, 0x00,
|
|
0x00, 0x05, 0x5f, 0x7f, 0x01, 0xdf, 0x14, 0x00, 0x05, 0x0f,
|
|
0x07, 0xa2, 0x09, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x5f,
|
|
0x18, 0xd7, 0x94, 0x71, 0x00, 0x05, 0x1f, 0xb7, 0x0c, 0x07,
|
|
0x0f, 0x0f, 0x00, 0x0f, 0x0f, 0x1f, 0x84, 0x8f, 0x05, 0x15,
|
|
0x05, 0x0f, 0x4f, 0xff, 0x87, 0xdf, 0x05, 0x01, 0x10, 0x00,
|
|
0x0f, 0x0f, 0x00, 0x08, 0x05, 0x04, 0x04, 0x01, 0x4f, 0xff,
|
|
0x9f, 0x8f, 0x4a, 0x40, 0x5f, 0x5f, 0xff, 0xfe, 0xdf, 0xff,
|
|
0x7f, 0xf7, 0xff, 0x7f, 0xff, 0xff, 0x7b, 0xff, 0x0f, 0xfd,
|
|
0xd7, 0x5f, 0x4f, 0x7f, 0x7f, 0xdf, 0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0x77, 0xdf, 0x7f, 0x4f, 0xef, 0xff, 0xff, 0x77, 0xff,
|
|
0xff, 0xff, 0x6f, 0xff, 0x0f, 0x4f, 0xff, 0xff, 0x9d, 0xff,
|
|
0x0f, 0xef, 0xff, 0xdf, 0x6f, 0xff, 0xff, 0xff, 0x4f, 0xff,
|
|
0xcd, 0x0f, 0x4f, 0xff, 0xff, 0xdf, 0x00, 0x00, 0x00, 0x0b,
|
|
0x05, 0x02, 0x02, 0x0f, 0x04, 0x00, 0x00, 0x0c, 0x01, 0x06,
|
|
0x00, 0x0f, 0x20, 0x03, 0x00, 0x00, 0x05, 0x0f, 0x40, 0x08,
|
|
0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x0c, 0x0f, 0x01, 0x00,
|
|
0x80, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x14, 0x01, 0x05,
|
|
0x01, 0x15, 0xaf, 0x0f, 0x00, 0x01, 0x10, 0x00, 0x08, 0x00,
|
|
0x46, 0x0c, 0x20, 0x00, 0x88, 0x00, 0x0f, 0x15, 0xff, 0xdf,
|
|
0x02, 0x00, 0x00, 0x0f, 0x7f, 0x5f, 0xdb, 0xff, 0x4f, 0x3e,
|
|
0x05, 0x0f, 0x7f, 0xf7, 0x95, 0x4f, 0x0d, 0x0f, 0x01, 0x0f,
|
|
0x4f, 0x5f, 0x9f, 0xdf, 0x25, 0x0e, 0x0d, 0x0d, 0x4f, 0x7f,
|
|
0x8f, 0x0f, 0x0f, 0xfa, 0x04, 0x4f, 0x4f, 0xff, 0xf7, 0x77,
|
|
0x47, 0xed, 0x05, 0x0f, 0xff, 0xff, 0xdf, 0xff, 0x4f, 0x6f,
|
|
0xd8, 0x5f, 0x0f, 0x7f, 0xdf, 0x5f, 0x07, 0x0f, 0x94, 0x0d,
|
|
0x1f, 0xff, 0xff, 0xff, 0x00, 0x02, 0x00, 0x03, 0x46, 0x57,
|
|
0x01, 0x0d, 0x01, 0x08, 0x01, 0x0f, 0x47, 0x6c, 0x0d, 0x0f,
|
|
0x02, 0x00, 0x00, 0x00, 0x0b, 0x4f, 0x00, 0x08, 0x05, 0x00,
|
|
0x95, 0x01, 0x0f, 0x7f, 0x0c, 0x0f, 0x01, 0x0e, 0x00, 0x00,
|
|
0x0f, 0x41, 0x00, 0x00, 0x04, 0x24, 0x0d, 0x0f, 0x0f, 0x7f,
|
|
0xcf, 0xdf, 0x00, 0x00, 0x00, 0x00, 0x04, 0x40, 0x00, 0x00,
|
|
0x06, 0x26, 0xcf, 0x05, 0xcf, 0x7f, 0xdf, 0xdf, 0x00, 0x00,
|
|
0x17, 0x5f, 0xff, 0xfd, 0xff, 0xff, 0x46, 0x09, 0x4f, 0x5f,
|
|
0x7f, 0xfd, 0xdf, 0xff, 0x0a, 0x88, 0xa7, 0x7f, 0x7f, 0xff,
|
|
0xff, 0xff, 0x0f, 0x04, 0xdf, 0x7f, 0x4f, 0xff, 0x9f, 0xff,
|
|
0x0e, 0xe6, 0xdf, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x0f, 0xec,
|
|
0x8f, 0x4f, 0x7f, 0xff, 0xdf, 0xff, 0x0f, 0xcf, 0xdf, 0xff,
|
|
0x6f, 0x7f, 0xff, 0xff, 0x03, 0x0c, 0x9d, 0x0f, 0x7f, 0xff,
|
|
0xff, 0xff,
|
|
};
|
|
|
|
static const uint8_t g_01[] = {
|
|
0x37, 0x73, 0x00, 0x19, 0x57, 0x7f, 0xf5, 0xfb, 0x70, 0x33,
|
|
0xf0, 0xf9, 0x7f, 0xff, 0xff, 0xff,
|
|
};
|
|
|
|
static const uint8_t g_02[] = {
|
|
0x50,
|
|
};
|
|
|
|
static const uint8_t g_10[] = {
|
|
0x00, 0x00, 0x00, 0x00, 0x50, 0x00, 0xf3, 0x5f, 0x84, 0x04,
|
|
0x17, 0x9f, 0x04, 0x23, 0x05, 0xff, 0x00, 0x00, 0x00, 0x02,
|
|
0x03, 0x03, 0x33, 0xd7, 0x05, 0x03, 0x5f, 0x3f, 0x17, 0x33,
|
|
0xff, 0xff, 0x00, 0x80, 0x02, 0x04, 0x12, 0x00, 0x11, 0x57,
|
|
0x05, 0x25, 0x05, 0x03, 0x35, 0xbf, 0x9f, 0xff, 0x07, 0x6f,
|
|
0x20, 0x40, 0x17, 0x06, 0xfa, 0xe8, 0x01, 0x07, 0x1f, 0x9f,
|
|
0x1f, 0xff, 0xff, 0xff,
|
|
};
|
|
|
|
static const uint8_t g_20[] = {
|
|
0x04, 0x00, 0x01, 0x01, 0x43, 0x2e, 0xff, 0x3f,
|
|
};
|
|
|
|
static const uint8_t g_30[] = {
|
|
0x11, 0x11, 0x11, 0x11, 0x51, 0x11, 0x13, 0x11, 0x11, 0x11,
|
|
0x13, 0x11, 0x11, 0x11, 0x33, 0x11, 0x13, 0x11, 0x13, 0x13,
|
|
0x13, 0x13, 0x31, 0x31, 0x11, 0x01, 0x11, 0x11, 0x71, 0x11,
|
|
0x11, 0x75,
|
|
};
|
|
|
|
static const uint8_t g_40[] = {
|
|
0x00, 0x0f, 0x00, 0x09, 0x00, 0x0d, 0x00, 0x0d, 0x00, 0x0f,
|
|
0x00, 0x4e, 0xe4, 0x0d, 0x10, 0x0f, 0x00, 0x0f, 0x44, 0x4f,
|
|
0x00, 0x1e, 0x0f, 0x0f, 0xae, 0xaf, 0x45, 0x7f, 0xef, 0xff,
|
|
0x0f, 0xff, 0x00, 0x09, 0x01, 0x11, 0x00, 0x01, 0x1c, 0xdd,
|
|
0x00, 0x15, 0x00, 0xff, 0x00, 0x10, 0x00, 0xfd, 0x00, 0x0f,
|
|
0x4f, 0x5f, 0x3d, 0xff, 0xff, 0xff, 0x4f, 0xff, 0x1c, 0xff,
|
|
0xdf, 0xff, 0x8f, 0xff, 0x00, 0x0d, 0x00, 0x00, 0x00, 0x15,
|
|
0x01, 0x07, 0x00, 0x01, 0x02, 0x1f, 0x01, 0x11, 0x05, 0x7f,
|
|
0x00, 0x1f, 0x41, 0x57, 0x1f, 0xff, 0x05, 0x77, 0x0d, 0x5f,
|
|
0x4d, 0xff, 0x4f, 0xff, 0x0f, 0xff, 0x00, 0x00, 0x02, 0x05,
|
|
0x00, 0x11, 0x05, 0x7d, 0x10, 0x15, 0x2f, 0xff, 0x40, 0x50,
|
|
0x0d, 0xfd, 0x04, 0x0f, 0x07, 0x1f, 0x07, 0x7f, 0x0f, 0xbf,
|
|
0x0d, 0x7f, 0x0f, 0xff, 0x4d, 0x7d, 0x0f, 0xff,
|
|
};
|
|
|
|
static const uint8_t g_11[] = {
|
|
0x01, 0x13, 0x03, 0x7f,
|
|
};
|
|
|
|
static const uint8_t g_21[] = {
|
|
0x17,
|
|
};
|
|
|
|
static const uint8_t g_31[] = {
|
|
0x55, 0x57, 0x57, 0x7f,
|
|
};
|
|
|
|
static const uint8_t g_41[] = {
|
|
0x01, 0x01, 0x01, 0x1f, 0x03, 0x1f, 0x3f, 0xff,
|
|
};
|
|
|
|
static const uint8_t g_12[] = {
|
|
0x40,
|
|
};
|
|
|
|
static const uint8_t g_22[] = {
|
|
0x00,
|
|
};
|
|
|
|
static const uint8_t g_32[] = {
|
|
0x10,
|
|
};
|
|
|
|
static const uint8_t g_42[] = {
|
|
0x10,
|
|
};
|
|
|
|
void ff_xface_generate_face(uint8_t *dst, uint8_t * const src)
|
|
{
|
|
int h, i, j, k, l, m;
|
|
|
|
for (j = 0; j < XFACE_HEIGHT; j++) {
|
|
for (i = 0; i < XFACE_WIDTH; i++) {
|
|
h = i + j * XFACE_WIDTH;
|
|
k = 0;
|
|
|
|
/*
|
|
Compute k, encoding the bits *before* the current one, contained in the
|
|
image buffer. That is, given the grid:
|
|
|
|
l i
|
|
| |
|
|
v v
|
|
+--+--+--+--+--+
|
|
m -> | 1| 2| 3| 4| 5|
|
|
+--+--+--+--+--+
|
|
| 6| 7| 8| 9|10|
|
|
+--+--+--+--+--+
|
|
j -> |11|12| *| | |
|
|
+--+--+--+--+--+
|
|
|
|
the value k for the pixel marked as "*" will contain the bit encoding of
|
|
the values in the matrix marked from "1" to "12". In case the pixel is
|
|
near the border of the grid, the number of values contained within the
|
|
grid will be lesser than 12.
|
|
*/
|
|
|
|
for (l = i - 2; l <= i + 2; l++) {
|
|
for (m = j - 2; m <= j; m++) {
|
|
if (l >= i && m == j)
|
|
continue;
|
|
if (l > 0 && l <= XFACE_WIDTH && m > 0)
|
|
k = 2*k + src[l + m * XFACE_WIDTH];
|
|
}
|
|
}
|
|
|
|
/*
|
|
Use the guess for the given position and the computed value of k.
|
|
|
|
The following table shows the number of digits in k, depending on
|
|
the position of the pixel, and shows the corresponding guess table
|
|
to use:
|
|
|
|
i=1 i=2 i=3 i=w-1 i=w
|
|
+----+----+----+ ... +----+----+
|
|
j=1 | 0 | 1 | 2 | | 2 | 2 |
|
|
|g22 |g12 |g02 | |g42 |g32 |
|
|
+----+----+----+ ... +----+----+
|
|
j=2 | 3 | 5 | 7 | | 6 | 5 |
|
|
|g21 |g11 |g01 | |g41 |g31 |
|
|
+----+----+----+ ... +----+----+
|
|
j=3 | 5 | 9 | 12 | | 10 | 8 |
|
|
|g20 |g10 |g00 | |g40 |g30 |
|
|
+----+----+----+ ... +----+----+
|
|
*/
|
|
|
|
#define GEN(table) dst[h] ^= (table[k>>3]>>(7-(k&7)))&1
|
|
|
|
switch (i) {
|
|
case 1:
|
|
switch (j) {
|
|
case 1: GEN(g_22); break;
|
|
case 2: GEN(g_21); break;
|
|
default: GEN(g_20); break;
|
|
}
|
|
break;
|
|
case 2:
|
|
switch (j) {
|
|
case 1: GEN(g_12); break;
|
|
case 2: GEN(g_11); break;
|
|
default: GEN(g_10); break;
|
|
}
|
|
break;
|
|
case XFACE_WIDTH - 1:
|
|
switch (j) {
|
|
case 1: GEN(g_42); break;
|
|
case 2: GEN(g_41); break;
|
|
default: GEN(g_40); break;
|
|
}
|
|
break;
|
|
case XFACE_WIDTH:
|
|
switch (j) {
|
|
case 1: GEN(g_32); break;
|
|
case 2: GEN(g_31); break;
|
|
default: GEN(g_30); break;
|
|
}
|
|
break;
|
|
default:
|
|
switch (j) {
|
|
case 1: GEN(g_02); break;
|
|
case 2: GEN(g_01); break;
|
|
default: GEN(g_00); break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|