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222 lines
6.9 KiB
222 lines
6.9 KiB
/* |
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* audio resampling |
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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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/** |
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* @file |
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* audio resampling |
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* @author Michael Niedermayer <michaelni@gmx.at> |
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*/ |
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#if defined(TEMPLATE_RESAMPLE_DBL) \ |
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|| defined(TEMPLATE_RESAMPLE_DBL_SSE2) |
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# define FILTER_SHIFT 0 |
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# define DELEM double |
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# define FELEM double |
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# define FELEM2 double |
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# define FELEML double |
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# define OUT(d, v) d = v |
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# if defined(TEMPLATE_RESAMPLE_DBL) |
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# define RENAME(N) N ## _double |
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# elif defined(TEMPLATE_RESAMPLE_DBL_SSE2) |
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# define COMMON_CORE COMMON_CORE_DBL_SSE2 |
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# define LINEAR_CORE LINEAR_CORE_DBL_SSE2 |
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# define RENAME(N) N ## _double_sse2 |
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# endif |
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#elif defined(TEMPLATE_RESAMPLE_FLT) \ |
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|| defined(TEMPLATE_RESAMPLE_FLT_SSE) \ |
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|| defined(TEMPLATE_RESAMPLE_FLT_AVX) |
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# define FILTER_SHIFT 0 |
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# define DELEM float |
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# define FELEM float |
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# define FELEM2 float |
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# define FELEML float |
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# define OUT(d, v) d = v |
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# if defined(TEMPLATE_RESAMPLE_FLT) |
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# define RENAME(N) N ## _float |
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# elif defined(TEMPLATE_RESAMPLE_FLT_SSE) |
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# define COMMON_CORE COMMON_CORE_FLT_SSE |
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# define LINEAR_CORE LINEAR_CORE_FLT_SSE |
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# define RENAME(N) N ## _float_sse |
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# elif defined(TEMPLATE_RESAMPLE_FLT_AVX) |
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# define COMMON_CORE COMMON_CORE_FLT_AVX |
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# define LINEAR_CORE LINEAR_CORE_FLT_AVX |
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# define RENAME(N) N ## _float_avx |
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# endif |
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#elif defined(TEMPLATE_RESAMPLE_S32) |
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# define RENAME(N) N ## _int32 |
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# define FILTER_SHIFT 30 |
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# define DELEM int32_t |
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# define FELEM int32_t |
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# define FELEM2 int64_t |
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# define FELEML int64_t |
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# define FELEM_MAX INT32_MAX |
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# define FELEM_MIN INT32_MIN |
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# define OUT(d, v) v = (v + (1<<(FILTER_SHIFT-1)))>>FILTER_SHIFT;\ |
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d = (uint64_t)(v + 0x80000000) > 0xFFFFFFFF ? (v>>63) ^ 0x7FFFFFFF : v |
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#elif defined(TEMPLATE_RESAMPLE_S16) \ |
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|| defined(TEMPLATE_RESAMPLE_S16_MMX2) \ |
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|| defined(TEMPLATE_RESAMPLE_S16_SSE2) |
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# define FILTER_SHIFT 15 |
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# define DELEM int16_t |
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# define FELEM int16_t |
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# define FELEM2 int32_t |
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# define FELEML int64_t |
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# define FELEM_MAX INT16_MAX |
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# define FELEM_MIN INT16_MIN |
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# define OUT(d, v) v = (v + (1<<(FILTER_SHIFT-1)))>>FILTER_SHIFT;\ |
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d = (unsigned)(v + 32768) > 65535 ? (v>>31) ^ 32767 : v |
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# if defined(TEMPLATE_RESAMPLE_S16) |
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# define RENAME(N) N ## _int16 |
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# elif defined(TEMPLATE_RESAMPLE_S16_MMX2) |
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# define COMMON_CORE COMMON_CORE_INT16_MMX2 |
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# define LINEAR_CORE LINEAR_CORE_INT16_MMX2 |
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# define RENAME(N) N ## _int16_mmx2 |
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# elif defined(TEMPLATE_RESAMPLE_S16_SSE2) |
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# define COMMON_CORE COMMON_CORE_INT16_SSE2 |
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# define LINEAR_CORE LINEAR_CORE_INT16_SSE2 |
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# define RENAME(N) N ## _int16_sse2 |
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# endif |
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#endif |
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#if DO_RESAMPLE_ONE |
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static void RENAME(resample_one)(DELEM *dst, const DELEM *src, |
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int dst_size, int64_t index2, int64_t incr) |
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{ |
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int dst_index; |
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for (dst_index = 0; dst_index < dst_size; dst_index++) { |
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dst[dst_index] = src[index2 >> 32]; |
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index2 += incr; |
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} |
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} |
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#endif |
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int RENAME(swri_resample_common)(ResampleContext *c, |
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DELEM *dst, const DELEM *src, |
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int n, int update_ctx) |
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{ |
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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 dst_incr_frac= c->dst_incr % c->src_incr; |
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int dst_incr= c->dst_incr / c->src_incr; |
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int sample_index = index >> c->phase_shift; |
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index &= c->phase_mask; |
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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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#ifdef COMMON_CORE |
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COMMON_CORE |
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#else |
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FELEM2 val=0; |
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int i; |
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for (i = 0; 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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#endif |
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frac += dst_incr_frac; |
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index += dst_incr; |
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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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sample_index += index >> c->phase_shift; |
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index &= c->phase_mask; |
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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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return sample_index; |
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} |
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int RENAME(swri_resample_linear)(ResampleContext *c, |
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DELEM *dst, const DELEM *src, |
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int n, int update_ctx) |
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{ |
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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 dst_incr_frac= c->dst_incr % c->src_incr; |
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int dst_incr= c->dst_incr / c->src_incr; |
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int sample_index = index >> c->phase_shift; |
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index &= c->phase_mask; |
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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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FELEM2 val=0, v2 = 0; |
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#ifdef LINEAR_CORE |
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LINEAR_CORE |
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#else |
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int i; |
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for (i = 0; i < c->filter_length; i++) { |
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val += src[sample_index + i] * (FELEM2)filter[i]; |
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v2 += src[sample_index + i] * (FELEM2)filter[i + c->filter_alloc]; |
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} |
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#endif |
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val += (v2 - val) * (FELEML) frac / c->src_incr; |
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OUT(dst[dst_index], val); |
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frac += dst_incr_frac; |
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index += dst_incr; |
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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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sample_index += index >> c->phase_shift; |
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index &= c->phase_mask; |
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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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return sample_index; |
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} |
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#undef COMMON_CORE |
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#undef LINEAR_CORE |
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#undef RENAME |
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#undef FILTER_SHIFT |
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#undef DELEM |
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#undef FELEM |
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#undef FELEM2 |
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#undef FELEML |
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#undef FELEM_MAX |
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#undef FELEM_MIN |
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#undef OUT
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