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fdctdsp_init.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "libavutil/attributes.h"
20 #include "libavutil/cpu.h"
21 #include "libavutil/x86/cpu.h"
22 #include "libavcodec/avcodec.h"
23 #include "libavcodec/fdctdsp.h"
24 #include "fdct.h"
25 
27  unsigned high_bit_depth)
28 {
30  const int dct_algo = avctx->dct_algo;
31 
32  if (!high_bit_depth) {
33  if ((dct_algo == FF_DCT_AUTO || dct_algo == FF_DCT_MMX)) {
34  if (INLINE_MMX(cpu_flags))
35  c->fdct = ff_fdct_mmx;
36 
37  if (INLINE_MMXEXT(cpu_flags))
38  c->fdct = ff_fdct_mmxext;
39 
40  if (INLINE_SSE2(cpu_flags))
41  c->fdct = ff_fdct_sse2;
42  }
43  }
44 }
int dct_algo
DCT algorithm, see FF_DCT_* below.
Definition: avcodec.h:2670
av_cold void ff_fdctdsp_init_x86(FDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Definition: fdctdsp_init.c:26
#define INLINE_SSE2(flags)
Definition: cpu.h:88
static atomic_int cpu_flags
Definition: cpu.c:50
void ff_fdct_mmxext(int16_t *block)
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:82
void ff_fdct_sse2(int16_t *block)
#define FF_DCT_MMX
Definition: avcodec.h:2674
#define INLINE_MMX(flags)
Definition: cpu.h:85
void ff_fdct_mmx(int16_t *block)
Libavcodec external API header.
void(* fdct)(int16_t *block)
Definition: fdctdsp.h:27
main external API structure.
Definition: avcodec.h:1488
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:92
#define INLINE_MMXEXT(flags)
Definition: cpu.h:86
static double c[64]
#define FF_DCT_AUTO
Definition: avcodec.h:2671