FFmpeg
idctdsp_init_loongarch.c
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1 /*
2  * Copyright (c) 2021 Loongson Technology Corporation Limited
3  * Contributed by Hao Chen <chenhao@loongson.cn>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
23 #include "idctdsp_loongarch.h"
24 #include "libavcodec/xvididct.h"
25 
27  unsigned high_bit_depth)
28 {
30 
31  if (have_lasx(cpu_flags)) {
32  if ((avctx->lowres != 1) && (avctx->lowres != 2) && (avctx->lowres != 3) &&
33  (avctx->bits_per_raw_sample != 10) &&
34  (avctx->bits_per_raw_sample != 12) &&
35  (avctx->idct_algo == FF_IDCT_AUTO)) {
36  c->idct_put = ff_simple_idct_put_lasx;
37  c->idct_add = ff_simple_idct_add_lasx;
38  c->idct = ff_simple_idct_lasx;
39  c->perm_type = FF_IDCT_PERM_NONE;
40  }
41  c->put_pixels_clamped = ff_put_pixels_clamped_lasx;
42  c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_lasx;
43  c->add_pixels_clamped = ff_add_pixels_clamped_lasx;
44  }
45 }
ff_simple_idct_lasx
void ff_simple_idct_lasx(int16_t *block)
Definition: simple_idct_lasx.c:177
idctdsp_loongarch.h
have_lasx
#define have_lasx(flags)
Definition: cpu.h:29
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:100
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:52
FF_IDCT_AUTO
#define FF_IDCT_AUTO
Definition: avcodec.h:1418
ff_simple_idct_add_lasx
void ff_simple_idct_add_lasx(uint8_t *dest, ptrdiff_t stride_dst, int16_t *block)
Definition: simple_idct_lasx.c:234
av_cold
#define av_cold
Definition: attributes.h:90
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1448
xvididct.h
ff_add_pixels_clamped_lasx
void ff_add_pixels_clamped_lasx(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t stride)
Definition: idctdsp_lasx.c:79
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVCodecContext::lowres
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:1455
FF_IDCT_PERM_NONE
@ FF_IDCT_PERM_NONE
Definition: idctdsp.h:38
ff_idctdsp_init_loongarch
av_cold void ff_idctdsp_init_loongarch(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Definition: idctdsp_init_loongarch.c:26
AVCodecContext::idct_algo
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:1417
IDCTDSPContext
Definition: idctdsp.h:53
AVCodecContext
main external API structure.
Definition: avcodec.h:389
ff_put_pixels_clamped_lasx
void ff_put_pixels_clamped_lasx(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t stride)
Definition: idctdsp_lasx.c:25
cpu.h
ff_put_signed_pixels_clamped_lasx
void ff_put_signed_pixels_clamped_lasx(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t stride)
Definition: idctdsp_lasx.c:50
ff_simple_idct_put_lasx
void ff_simple_idct_put_lasx(uint8_t *dest, ptrdiff_t stride_dst, int16_t *block)
Definition: simple_idct_lasx.c:200