diff options
Diffstat (limited to 'libswresample/aarch64/resample_init.c')
| -rw-r--r-- | libswresample/aarch64/resample_init.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/libswresample/aarch64/resample_init.c b/libswresample/aarch64/resample_init.c new file mode 100644 index 0000000000..d01ec18756 --- /dev/null +++ b/libswresample/aarch64/resample_init.c @@ -0,0 +1,120 @@ +/* + * 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/aarch64/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_aarch64_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; + } +} |