FFmpeg/libavcodec/synth_filter.h
Janne Grunau 705f5e5e15 arm64: port synth_filter_float_neon from arm
~25% faster dts decoding overall. The checkasm CPU cycles numbers are
not that useful since synth_filter_float() calls FFTContext.imdct_half().

                         cortex-a57   cortex-a53
synth_filter_float_c:    1866.2       3490.9
synth_filter_float_neon:  915.0       1531.5

With fftc.imdct_half forced to imdct_half_neon:
                         cortex-a57   cortex-a53
synth_filter_float_c:    1718.4       3025.3
synth_filter_float_neon:  926.2       1530.1
2015-12-14 16:45:01 +01:00

40 lines
1.5 KiB
C

/*
* copyright (c) 2008 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_SYNTH_FILTER_H
#define AVCODEC_SYNTH_FILTER_H
#include "fft.h"
typedef struct SynthFilterContext {
void (*synth_filter_float)(FFTContext *imdct,
float *synth_buf_ptr, int *synth_buf_offset,
float synth_buf2[32], const float window[512],
float out[32], const float in[32],
float scale);
} SynthFilterContext;
void ff_synth_filter_init(SynthFilterContext *c);
void ff_synth_filter_init_aarch64(SynthFilterContext *c);
void ff_synth_filter_init_arm(SynthFilterContext *c);
void ff_synth_filter_init_x86(SynthFilterContext *c);
#endif /* AVCODEC_SYNTH_FILTER_H */