2 * This file is part of FFmpeg.
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.
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.
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
20 #include "libavutil/attributes.h"
21 #include "libavutil/cpu.h"
22 #include "libavutil/x86/cpu.h"
23 #include "libavcodec/dct.h"
25 void ff_dct32_float_sse(FFTSample
*out
, const FFTSample
*in
);
26 void ff_dct32_float_sse2(FFTSample
*out
, const FFTSample
*in
);
27 void ff_dct32_float_avx(FFTSample
*out
, const FFTSample
*in
);
29 av_cold
void ff_dct_init_x86(DCTContext
*s
)
31 int cpu_flags
= av_get_cpu_flags();
33 if (ARCH_X86_32
&& EXTERNAL_SSE(cpu_flags
))
34 s
->dct32
= ff_dct32_float_sse
;
35 if (EXTERNAL_SSE2(cpu_flags
))
36 s
->dct32
= ff_dct32_float_sse2
;
37 if (EXTERNAL_AVX(cpu_flags
))
38 s
->dct32
= ff_dct32_float_avx
;