mirror of https://github.com/FFmpeg/FFmpeg.git
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.
102 lines
3.2 KiB
102 lines
3.2 KiB
/* |
|
* 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 "config.h" |
|
#include "libavutil/attributes.h" |
|
#include "lossless_videoencdsp.h" |
|
#include "mathops.h" |
|
|
|
// 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size |
|
#define pb_7f (~0UL / 255 * 0x7f) |
|
#define pb_80 (~0UL / 255 * 0x80) |
|
|
|
static void diff_bytes_c(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, intptr_t w) |
|
{ |
|
long i; |
|
|
|
#if !HAVE_FAST_UNALIGNED |
|
if (((long)src1 | (long)src2) & (sizeof(long) - 1)) { |
|
for (i = 0; i + 7 < w; i += 8) { |
|
dst[i + 0] = src1[i + 0] - src2[i + 0]; |
|
dst[i + 1] = src1[i + 1] - src2[i + 1]; |
|
dst[i + 2] = src1[i + 2] - src2[i + 2]; |
|
dst[i + 3] = src1[i + 3] - src2[i + 3]; |
|
dst[i + 4] = src1[i + 4] - src2[i + 4]; |
|
dst[i + 5] = src1[i + 5] - src2[i + 5]; |
|
dst[i + 6] = src1[i + 6] - src2[i + 6]; |
|
dst[i + 7] = src1[i + 7] - src2[i + 7]; |
|
} |
|
} else |
|
#endif |
|
for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) { |
|
long a = *(long *) (src1 + i); |
|
long b = *(long *) (src2 + i); |
|
*(long *) (dst + i) = ((a | pb_80) - (b & pb_7f)) ^ |
|
((a ^ b ^ pb_80) & pb_80); |
|
} |
|
for (; i < w; i++) |
|
dst[i + 0] = src1[i + 0] - src2[i + 0]; |
|
} |
|
|
|
static void sub_median_pred_c(uint8_t *dst, const uint8_t *src1, |
|
const uint8_t *src2, intptr_t w, |
|
int *left, int *left_top) |
|
{ |
|
int i; |
|
uint8_t l, lt; |
|
|
|
l = *left; |
|
lt = *left_top; |
|
|
|
for (i = 0; i < w; i++) { |
|
const int pred = mid_pred(l, src1[i], (l + src1[i] - lt) & 0xFF); |
|
lt = src1[i]; |
|
l = src2[i]; |
|
dst[i] = l - pred; |
|
} |
|
|
|
*left = l; |
|
*left_top = lt; |
|
} |
|
|
|
static void sub_left_predict_c(uint8_t *dst, const uint8_t *src, |
|
ptrdiff_t stride, ptrdiff_t width, int height) |
|
{ |
|
int i, j; |
|
uint8_t prev = 0x80; /* Set the initial value */ |
|
for (j = 0; j < height; j++) { |
|
for (i = 0; i < width; i++) { |
|
*dst++ = src[i] - prev; |
|
prev = src[i]; |
|
} |
|
src += stride; |
|
} |
|
} |
|
|
|
av_cold void ff_llvidencdsp_init(LLVidEncDSPContext *c) |
|
{ |
|
c->diff_bytes = diff_bytes_c; |
|
c->sub_median_pred = sub_median_pred_c; |
|
c->sub_left_predict = sub_left_predict_c; |
|
|
|
#if ARCH_RISCV |
|
ff_llvidencdsp_init_riscv(c); |
|
#elif ARCH_X86 |
|
ff_llvidencdsp_init_x86(c); |
|
#endif |
|
}
|
|
|