mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
06f94149c6
separate dsp.resample to dsp.resample_common and dsp.resample_linear
and choose to call faster resample_common even when linear_interp=on
when c->frac and c->dst_incr_mod are both zero
speed up resampling when exact_rational and linear_interp are both
enabled because exact_rational force c->frac and c->dst_incr_mod to
be zero when soft compensation does not happen
benchmark on exact_rational=on:linear_interp=on
old new
real 8.432s 5.097s
user 7.679s 4.989s
sys 0.125s 0.107s
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
121 lines
8.0 KiB
C
121 lines
8.0 KiB
C
/*
|
|
* Audio resampling
|
|
*
|
|
* Copyright (c) 2004-2012 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include "libavutil/cpu.h"
|
|
#include "libavutil/avassert.h"
|
|
|
|
#include "libavutil/arm/cpu.h"
|
|
#include "libswresample/resample.h"
|
|
|
|
#define DECLARE_RESAMPLE_COMMON_TEMPLATE(TYPE, DELEM, FELEM, FELEM2, OUT) \
|
|
\
|
|
void ff_resample_common_apply_filter_x4_##TYPE##_neon(FELEM2 *acc, const DELEM *src, \
|
|
const FELEM *filter, int length); \
|
|
\
|
|
void ff_resample_common_apply_filter_x8_##TYPE##_neon(FELEM2 *acc, const DELEM *src, \
|
|
const FELEM *filter, int length); \
|
|
\
|
|
static int ff_resample_common_##TYPE##_neon(ResampleContext *c, void *dest, const void *source, \
|
|
int n, int update_ctx) \
|
|
{ \
|
|
DELEM *dst = dest; \
|
|
const DELEM *src = source; \
|
|
int dst_index; \
|
|
int index= c->index; \
|
|
int frac= c->frac; \
|
|
int sample_index = 0; \
|
|
int x4_aligned_filter_length = c->filter_length & ~3; \
|
|
int x8_aligned_filter_length = c->filter_length & ~7; \
|
|
\
|
|
while (index >= c->phase_count) { \
|
|
sample_index++; \
|
|
index -= c->phase_count; \
|
|
} \
|
|
\
|
|
for (dst_index = 0; dst_index < n; dst_index++) { \
|
|
FELEM *filter = ((FELEM *) c->filter_bank) + c->filter_alloc * index; \
|
|
\
|
|
FELEM2 val=0; \
|
|
int i = 0; \
|
|
if (x8_aligned_filter_length >= 8) { \
|
|
ff_resample_common_apply_filter_x8_##TYPE##_neon(&val, &src[sample_index], \
|
|
filter, x8_aligned_filter_length); \
|
|
i += x8_aligned_filter_length; \
|
|
\
|
|
} else if (x4_aligned_filter_length >= 4) { \
|
|
ff_resample_common_apply_filter_x4_##TYPE##_neon(&val, &src[sample_index], \
|
|
filter, x4_aligned_filter_length); \
|
|
i += x4_aligned_filter_length; \
|
|
} \
|
|
for (; i < c->filter_length; i++) { \
|
|
val += src[sample_index + i] * (FELEM2)filter[i]; \
|
|
} \
|
|
OUT(dst[dst_index], val); \
|
|
\
|
|
frac += c->dst_incr_mod; \
|
|
index += c->dst_incr_div; \
|
|
if (frac >= c->src_incr) { \
|
|
frac -= c->src_incr; \
|
|
index++; \
|
|
} \
|
|
\
|
|
while (index >= c->phase_count) { \
|
|
sample_index++; \
|
|
index -= c->phase_count; \
|
|
} \
|
|
} \
|
|
\
|
|
if(update_ctx){ \
|
|
c->frac= frac; \
|
|
c->index= index; \
|
|
} \
|
|
\
|
|
return sample_index; \
|
|
} \
|
|
|
|
#define OUT(d, v) d = v
|
|
DECLARE_RESAMPLE_COMMON_TEMPLATE(float, float, float, float, OUT)
|
|
#undef OUT
|
|
|
|
#define OUT(d, v) (v) = ((v) + (1<<(14)))>>15; (d) = av_clip_int16(v)
|
|
DECLARE_RESAMPLE_COMMON_TEMPLATE(s16, int16_t, int16_t, int32_t, OUT)
|
|
#undef OUT
|
|
|
|
av_cold void swri_resample_dsp_arm_init(ResampleContext *c)
|
|
{
|
|
int cpu_flags = av_get_cpu_flags();
|
|
|
|
if (!have_neon(cpu_flags))
|
|
return;
|
|
|
|
switch(c->format) {
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
c->dsp.resample_common = ff_resample_common_float_neon;
|
|
break;
|
|
case AV_SAMPLE_FMT_S16P:
|
|
c->dsp.resample_common = ff_resample_common_s16_neon;
|
|
break;
|
|
}
|
|
}
|