FFmpeg
2.6.3
Main Page
Related Pages
Modules
Namespaces
Data Structures
Files
Examples
File List
Globals
All
Data Structures
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Macros
Modules
Pages
libavcodec
ppc
fmtconvert_altivec.c
Go to the documentation of this file.
1
/*
2
* Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
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
13
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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
*/
20
21
#include "
config.h
"
22
#include "
libavutil/attributes.h
"
23
#include "
libavutil/cpu.h
"
24
#include "
libavutil/mem.h
"
25
#include "
libavutil/ppc/cpu.h
"
26
#include "
libavutil/ppc/util_altivec.h
"
27
#include "
libavcodec/fmtconvert.h
"
28
29
#if HAVE_ALTIVEC
30
31
static
void
int32_to_float_fmul_scalar_altivec(
float
*dst,
const
int32_t
*
src
,
32
float
mul,
int
len
)
33
{
34
union
{
35
vector
float
v
;
36
float
s
[4];
37
} mul_u;
38
int
i;
39
vector
float
src1, src2, dst1, dst2, mul_v,
zero
;
40
41
zero = (vector float)vec_splat_u32(0);
42
mul_u.s[0] = mul;
43
mul_v = vec_splat(mul_u.v, 0);
44
45
for
(i = 0; i <
len
; i += 8) {
46
src1 = vec_ctf(vec_ld(0, src+i), 0);
47
src2 = vec_ctf(vec_ld(16, src+i), 0);
48
dst1 = vec_madd(src1, mul_v, zero);
49
dst2 = vec_madd(src2, mul_v, zero);
50
vec_st(dst1, 0, dst+i);
51
vec_st(dst2, 16, dst+i);
52
}
53
}
54
55
#endif
/* HAVE_ALTIVEC */
56
57
av_cold
void
ff_fmt_convert_init_ppc
(
FmtConvertContext
*
c
,
58
AVCodecContext
*avctx)
59
{
60
#if HAVE_ALTIVEC
61
if
(!
PPC_ALTIVEC
(
av_get_cpu_flags
()))
62
return
;
63
64
c->
int32_to_float_fmul_scalar
= int32_to_float_fmul_scalar_altivec;
65
#endif
/* HAVE_ALTIVEC */
66
}
v
float v
Definition:
avf_showspectrum.c:96
s
const char * s
Definition:
avisynth_c.h:669
cpu.h
mem.h
memory handling functions
attributes.h
Macro definitions for various function/variable attributes.
config.h
av_cold
#define av_cold
Definition:
attributes.h:74
FmtConvertContext
Definition:
fmtconvert.h:28
PPC_ALTIVEC
#define PPC_ALTIVEC(flags)
Definition:
cpu.h:26
zero
#define zero
Definition:
regdef.h:64
int32_t
int32_t
Definition:
audio_convert.c:194
FmtConvertContext::int32_to_float_fmul_scalar
void(* int32_to_float_fmul_scalar)(float *dst, const int32_t *src, float mul, int len)
Convert an array of int32_t to float and multiply by a float value.
Definition:
fmtconvert.h:38
ff_fmt_convert_init_ppc
av_cold void ff_fmt_convert_init_ppc(FmtConvertContext *c, AVCodecContext *avctx)
Definition:
fmtconvert_altivec.c:57
src
AVS_Value src
Definition:
avisynth_c.h:524
cpu.h
AVCodecContext
main external API structure.
Definition:
avcodec.h:1239
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition:
cpu.c:75
util_altivec.h
Contains misc utility macros and inline functions.
fmtconvert.h
c
static double c[64]
Definition:
vsrc_mptestsrc.c:87
len
int len
Definition:
vorbis_enc_data.h:452
Generated on Sun May 24 2015 19:50:58 for FFmpeg by
1.8.8