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122 lines
8.0 KiB
122 lines
8.0 KiB
/* |
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* Audio resampling |
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* |
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* Copyright (c) 2004-2012 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "config.h" |
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#include "libavutil/cpu.h" |
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#include "libavutil/avassert.h" |
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#include "libavutil/arm/cpu.h" |
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#include "libswresample/resample.h" |
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#define DECLARE_RESAMPLE_COMMON_TEMPLATE(TYPE, DELEM, FELEM, FELEM2, OUT) \ |
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\ |
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void ff_resample_common_apply_filter_x4_##TYPE##_neon(FELEM2 *acc, const DELEM *src, \ |
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const FELEM *filter, int length); \ |
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\ |
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void ff_resample_common_apply_filter_x8_##TYPE##_neon(FELEM2 *acc, const DELEM *src, \ |
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const FELEM *filter, int length); \ |
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\ |
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static int ff_resample_common_##TYPE##_neon(ResampleContext *c, void *dest, const void *source, \ |
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int n, int update_ctx) \ |
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{ \ |
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DELEM *dst = dest; \ |
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const DELEM *src = source; \ |
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int dst_index; \ |
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int index= c->index; \ |
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int frac= c->frac; \ |
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int sample_index = 0; \ |
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int x4_aligned_filter_length = c->filter_length & ~3; \ |
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int x8_aligned_filter_length = c->filter_length & ~7; \ |
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\ |
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while (index >= c->phase_count) { \ |
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sample_index++; \ |
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index -= c->phase_count; \ |
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} \ |
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\ |
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for (dst_index = 0; dst_index < n; dst_index++) { \ |
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FELEM *filter = ((FELEM *) c->filter_bank) + c->filter_alloc * index; \ |
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\ |
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FELEM2 val=0; \ |
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int i = 0; \ |
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if (x8_aligned_filter_length >= 8) { \ |
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ff_resample_common_apply_filter_x8_##TYPE##_neon(&val, &src[sample_index], \ |
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filter, x8_aligned_filter_length); \ |
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i += x8_aligned_filter_length; \ |
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\ |
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} else if (x4_aligned_filter_length >= 4) { \ |
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ff_resample_common_apply_filter_x4_##TYPE##_neon(&val, &src[sample_index], \ |
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filter, x4_aligned_filter_length); \ |
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i += x4_aligned_filter_length; \ |
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} \ |
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for (; i < c->filter_length; i++) { \ |
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val += src[sample_index + i] * (FELEM2)filter[i]; \ |
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} \ |
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OUT(dst[dst_index], val); \ |
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\ |
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frac += c->dst_incr_mod; \ |
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index += c->dst_incr_div; \ |
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if (frac >= c->src_incr) { \ |
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frac -= c->src_incr; \ |
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index++; \ |
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} \ |
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\ |
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while (index >= c->phase_count) { \ |
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sample_index++; \ |
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index -= c->phase_count; \ |
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} \ |
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} \ |
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\ |
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if(update_ctx){ \ |
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c->frac= frac; \ |
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c->index= index; \ |
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} \ |
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\ |
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return sample_index; \ |
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} \ |
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#define OUT(d, v) d = v |
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DECLARE_RESAMPLE_COMMON_TEMPLATE(float, float, float, float, OUT) |
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#undef OUT |
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#define OUT(d, v) (v) = ((v) + (1<<(14)))>>15; (d) = av_clip_int16(v) |
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DECLARE_RESAMPLE_COMMON_TEMPLATE(s16, int16_t, int16_t, int32_t, OUT) |
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#undef OUT |
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av_cold void swri_resample_dsp_arm_init(ResampleContext *c) |
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{ |
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int cpu_flags = av_get_cpu_flags(); |
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if (!have_neon(cpu_flags)) |
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return; |
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switch(c->format) { |
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case AV_SAMPLE_FMT_FLTP: |
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if (!c->linear) |
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c->dsp.resample = ff_resample_common_float_neon; |
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break; |
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case AV_SAMPLE_FMT_S16P: |
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if (!c->linear) |
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c->dsp.resample = ff_resample_common_s16_neon; |
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break; |
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} |
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}
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