mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
8.0 KiB
120 lines
8.0 KiB
/* |
|
* 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; |
|
} |
|
}
|
|
|