mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
d8b4e9adbb
* commit 'ea031b75fb50c59196ccb654c9d143fb75365da9': hqx: Move DSP related code to a separate file Conflicts: libavcodec/hqx.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
132 lines
3.8 KiB
C
132 lines
3.8 KiB
C
/*
|
|
* HQX DSP routines
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/common.h"
|
|
|
|
#include "hqxdsp.h"
|
|
|
|
static inline void idct_col(int16_t *blk, const uint8_t *quant)
|
|
{
|
|
int t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, tA, tB, tC, tD, tE, tF;
|
|
int t10, t11, t12, t13;
|
|
int s0, s1, s2, s3, s4, s5, s6, s7;
|
|
|
|
s0 = (int) blk[0 * 8] * quant[0 * 8];
|
|
s1 = (int) blk[1 * 8] * quant[1 * 8];
|
|
s2 = (int) blk[2 * 8] * quant[2 * 8];
|
|
s3 = (int) blk[3 * 8] * quant[3 * 8];
|
|
s4 = (int) blk[4 * 8] * quant[4 * 8];
|
|
s5 = (int) blk[5 * 8] * quant[5 * 8];
|
|
s6 = (int) blk[6 * 8] * quant[6 * 8];
|
|
s7 = (int) blk[7 * 8] * quant[7 * 8];
|
|
|
|
t0 = (s3 * 19266 + s5 * 12873) >> 15;
|
|
t1 = (s5 * 19266 - s3 * 12873) >> 15;
|
|
t2 = ((s7 * 4520 + s1 * 22725) >> 15) - t0;
|
|
t3 = ((s1 * 4520 - s7 * 22725) >> 15) - t1;
|
|
t4 = t0 * 2 + t2;
|
|
t5 = t1 * 2 + t3;
|
|
t6 = t2 - t3;
|
|
t7 = t3 * 2 + t6;
|
|
t8 = (t6 * 11585) >> 14;
|
|
t9 = (t7 * 11585) >> 14;
|
|
tA = (s2 * 8867 - s6 * 21407) >> 14;
|
|
tB = (s6 * 8867 + s2 * 21407) >> 14;
|
|
tC = (s0 >> 1) - (s4 >> 1);
|
|
tD = (s4 >> 1) * 2 + tC;
|
|
tE = tC - (tA >> 1);
|
|
tF = tD - (tB >> 1);
|
|
t10 = tF - t5;
|
|
t11 = tE - t8;
|
|
t12 = tE + (tA >> 1) * 2 - t9;
|
|
t13 = tF + (tB >> 1) * 2 - t4;
|
|
|
|
blk[0 * 8] = t13 + t4 * 2;
|
|
blk[1 * 8] = t12 + t9 * 2;
|
|
blk[2 * 8] = t11 + t8 * 2;
|
|
blk[3 * 8] = t10 + t5 * 2;
|
|
blk[4 * 8] = t10;
|
|
blk[5 * 8] = t11;
|
|
blk[6 * 8] = t12;
|
|
blk[7 * 8] = t13;
|
|
}
|
|
|
|
static inline void idct_row(int16_t *blk)
|
|
{
|
|
int t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, tA, tB, tC, tD, tE, tF;
|
|
int t10, t11, t12, t13;
|
|
|
|
t0 = (blk[3] * 19266 + blk[5] * 12873) >> 14;
|
|
t1 = (blk[5] * 19266 - blk[3] * 12873) >> 14;
|
|
t2 = ((blk[7] * 4520 + blk[1] * 22725) >> 14) - t0;
|
|
t3 = ((blk[1] * 4520 - blk[7] * 22725) >> 14) - t1;
|
|
t4 = t0 * 2 + t2;
|
|
t5 = t1 * 2 + t3;
|
|
t6 = t2 - t3;
|
|
t7 = t3 * 2 + t6;
|
|
t8 = (t6 * 11585) >> 14;
|
|
t9 = (t7 * 11585) >> 14;
|
|
tA = (blk[2] * 8867 - blk[6] * 21407) >> 14;
|
|
tB = (blk[6] * 8867 + blk[2] * 21407) >> 14;
|
|
tC = blk[0] - blk[4];
|
|
tD = blk[4] * 2 + tC;
|
|
tE = tC - tA;
|
|
tF = tD - tB;
|
|
t10 = tF - t5;
|
|
t11 = tE - t8;
|
|
t12 = tE + tA * 2 - t9;
|
|
t13 = tF + tB * 2 - t4;
|
|
|
|
blk[0] = (t13 + t4 * 2 + 4) >> 3;
|
|
blk[1] = (t12 + t9 * 2 + 4) >> 3;
|
|
blk[2] = (t11 + t8 * 2 + 4) >> 3;
|
|
blk[3] = (t10 + t5 * 2 + 4) >> 3;
|
|
blk[4] = (t10 + 4) >> 3;
|
|
blk[5] = (t11 + 4) >> 3;
|
|
blk[6] = (t12 + 4) >> 3;
|
|
blk[7] = (t13 + 4) >> 3;
|
|
}
|
|
|
|
static void hqx_idct_put(uint16_t *dst, ptrdiff_t stride,
|
|
int16_t *block, const uint8_t *quant)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
idct_col(block + i, quant + i);
|
|
for (i = 0; i < 8; i++)
|
|
idct_row(block + i * 8);
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
for (j = 0; j < 8; j++) {
|
|
int v = av_clip_uintp2(block[j + i * 8] + 0x800, 12);
|
|
dst[j] = (v << 4) | (v >> 8);
|
|
}
|
|
dst += stride >> 1;
|
|
}
|
|
}
|
|
|
|
av_cold void ff_hqxdsp_init(HQXDSPContext *c)
|
|
{
|
|
c->idct_put = hqx_idct_put;
|
|
}
|