FFmpeg
pixblockdsp_init_mips.c
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1 /*
2  * Copyright (c) 2015 Shivraj Patil (Shivraj.Patil@imgtec.com)
3  * Zhou Xiaoyong <zhouxiaoyong@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 
22 #include "libavutil/mips/cpu.h"
23 #include "pixblockdsp_mips.h"
24 
26  unsigned high_bit_depth)
27 {
29 
30  if (have_mmi(cpu_flags)) {
32 
33  if (!high_bit_depth || avctx->codec_type != AVMEDIA_TYPE_VIDEO) {
35  }
36  }
37 
38  if (have_msa(cpu_flags)) {
40 
41  switch (avctx->bits_per_raw_sample) {
42  case 9:
43  case 10:
44  case 12:
45  case 14:
47  break;
48  default:
49  if (avctx->bits_per_raw_sample <= 8 || avctx->codec_type !=
52  }
53  break;
54  }
55  }
56 }
void ff_pixblockdsp_init_mips(PixblockDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
static atomic_int cpu_flags
Definition: cpu.c:50
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1757
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
void(* diff_pixels)(int16_t *av_restrict block, const uint8_t *s1, const uint8_t *s2, ptrdiff_t stride)
Definition: pixblockdsp.h:35
void ff_diff_pixels_mmi(int16_t *av_restrict block, const uint8_t *src1, const uint8_t *src2, ptrdiff_t stride)
#define have_mmi(flags)
Definition: cpu.h:25
enum AVMediaType codec_type
Definition: avcodec.h:534
void ff_get_pixels_8_mmi(int16_t *av_restrict block, const uint8_t *pixels, ptrdiff_t stride)
main external API structure.
Definition: avcodec.h:526
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
void(* get_pixels)(int16_t *av_restrict block, const uint8_t *pixels, ptrdiff_t stride)
Definition: pixblockdsp.h:29
#define have_msa(flags)
Definition: cpu.h:26
void ff_get_pixels_16_msa(int16_t *restrict dst, const uint8_t *src, ptrdiff_t stride)
void ff_diff_pixels_msa(int16_t *av_restrict block, const uint8_t *src1, const uint8_t *src2, ptrdiff_t stride)
void ff_get_pixels_8_msa(int16_t *restrict dst, const uint8_t *src, ptrdiff_t stride)