Go to the documentation of this file.
1 /*
2  * Copyright (c) 2009 David Conrad <lessen42@gmail.com>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
21 #include <stdint.h>
23 #include "libavutil/attributes.h"
24 #include "libavutil/cpu.h"
25 #include "libavutil/x86/cpu.h"
26 #include "libavcodec/avcodec.h"
27 #include "libavcodec/vp3dsp.h"
29 void ff_vp3_idct_put_mmx(uint8_t *dest, ptrdiff_t stride, int16_t *block);
30 void ff_vp3_idct_add_mmx(uint8_t *dest, ptrdiff_t stride, int16_t *block);
32 void ff_vp3_idct_put_sse2(uint8_t *dest, ptrdiff_t stride, int16_t *block);
33 void ff_vp3_idct_add_sse2(uint8_t *dest, ptrdiff_t stride, int16_t *block);
35 void ff_vp3_idct_dc_add_mmxext(uint8_t *dest, ptrdiff_t stride, int16_t *block);
38  int *bounding_values);
40  int *bounding_values);
43  const uint8_t *b, ptrdiff_t stride,
44  int h);
47 {
50  if (EXTERNAL_MMX(cpu_flags)) {
52 #if ARCH_X86_32
55 #endif
56  }
58  if (EXTERNAL_MMXEXT(cpu_flags)) {
61  if (!(flags & AV_CODEC_FLAG_BITEXACT)) {
64  }
65  }
67  if (EXTERNAL_SSE2(cpu_flags)) {
70  }
71 }
#define EXTERNAL_MMX(flags)
Definition: cpu.h:56
void(* put_no_rnd_pixels_l2)(uint8_t *dst, const uint8_t *a, const uint8_t *b, ptrdiff_t stride, int h)
Copy 8xH pixels from source to destination buffer using a bilinear filter with no rounding (i...
Definition: vp3dsp.h:36
void ff_vp3_idct_dc_add_mmxext(uint8_t *dest, ptrdiff_t stride, int16_t *block)
void(* v_loop_filter)(uint8_t *src, ptrdiff_t stride, int *bounding_values)
Definition: vp3dsp.h:44
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
static atomic_int cpu_flags
Definition: cpu.c:50
void ff_vp3_idct_put_mmx(uint8_t *dest, ptrdiff_t stride, int16_t *block)
void ff_vp3_v_loop_filter_mmxext(uint8_t *src, ptrdiff_t stride, int *bounding_values)
Macro definitions for various function/variable attributes.
The exact code depends on how similar the blocks are and how related they are to the block
#define av_cold
Definition: attributes.h:88
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
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
#define src
Definition: vp8dsp.c:255
void(* idct_add)(uint8_t *dest, ptrdiff_t stride, int16_t *block)
Definition: vp3dsp.h:42
void ff_vp3_idct_add_mmx(uint8_t *dest, ptrdiff_t stride, int16_t *block)
void(* h_loop_filter)(uint8_t *src, ptrdiff_t stride, int *bounding_values)
Definition: vp3dsp.h:45
void ff_put_vp_no_rnd_pixels8_l2_mmx(uint8_t *dst, const uint8_t *a, const uint8_t *b, ptrdiff_t stride, int h)
#define b
Definition: input.c:41
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:333
void ff_vp3_idct_add_sse2(uint8_t *dest, ptrdiff_t stride, int16_t *block)
void(* idct_dc_add)(uint8_t *dest, ptrdiff_t stride, int16_t *block)
Definition: vp3dsp.h:43
Libavcodec external API header.
void ff_vp3_h_loop_filter_mmxext(uint8_t *src, ptrdiff_t stride, int *bounding_values)
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104
av_cold void ff_vp3dsp_init_x86(VP3DSPContext *c, int flags)
Definition: vp3dsp_init.c:46
void ff_vp3_idct_put_sse2(uint8_t *dest, ptrdiff_t stride, int16_t *block)
void(* idct_put)(uint8_t *dest, ptrdiff_t stride, int16_t *block)
Definition: vp3dsp.h:41
void(* v_loop_filter_unaligned)(uint8_t *src, ptrdiff_t stride, int *bounding_values)
Definition: vp3dsp.h:46