/* * audio resampling * Copyright (c) 2004-2012 Michael Niedermayer * * 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 */ /** * @file * audio resampling * @author Michael Niedermayer */ #if defined(TEMPLATE_RESAMPLE_DBL) \ || defined(TEMPLATE_RESAMPLE_DBL_SSE2) # define FILTER_SHIFT 0 # define DELEM double # define FELEM double # define FELEM2 double # define FELEML double # define OUT(d, v) d = v # if defined(TEMPLATE_RESAMPLE_DBL) # define RENAME(N) N ## _double # elif defined(TEMPLATE_RESAMPLE_DBL_SSE2) # define COMMON_CORE COMMON_CORE_DBL_SSE2 # define LINEAR_CORE LINEAR_CORE_DBL_SSE2 # define RENAME(N) N ## _double_sse2 # endif #elif defined(TEMPLATE_RESAMPLE_FLT) \ || defined(TEMPLATE_RESAMPLE_FLT_SSE) \ || defined(TEMPLATE_RESAMPLE_FLT_AVX) # define FILTER_SHIFT 0 # define DELEM float # define FELEM float # define FELEM2 float # define FELEML float # define OUT(d, v) d = v # if defined(TEMPLATE_RESAMPLE_FLT) # define RENAME(N) N ## _float # elif defined(TEMPLATE_RESAMPLE_FLT_SSE) # define COMMON_CORE COMMON_CORE_FLT_SSE # define LINEAR_CORE LINEAR_CORE_FLT_SSE # define RENAME(N) N ## _float_sse # elif defined(TEMPLATE_RESAMPLE_FLT_AVX) # define COMMON_CORE COMMON_CORE_FLT_AVX # define LINEAR_CORE LINEAR_CORE_FLT_AVX # define RENAME(N) N ## _float_avx # endif #elif defined(TEMPLATE_RESAMPLE_S32) # define RENAME(N) N ## _int32 # define FILTER_SHIFT 30 # define DELEM int32_t # define FELEM int32_t # define FELEM2 int64_t # define FELEML int64_t # define FELEM_MAX INT32_MAX # define FELEM_MIN INT32_MIN # define OUT(d, v) v = (v + (1<<(FILTER_SHIFT-1)))>>FILTER_SHIFT;\ d = (uint64_t)(v + 0x80000000) > 0xFFFFFFFF ? (v>>63) ^ 0x7FFFFFFF : v #elif defined(TEMPLATE_RESAMPLE_S16) \ || defined(TEMPLATE_RESAMPLE_S16_MMX2) \ || defined(TEMPLATE_RESAMPLE_S16_SSE2) # define FILTER_SHIFT 15 # define DELEM int16_t # define FELEM int16_t # define FELEM2 int32_t # define FELEML int64_t # define FELEM_MAX INT16_MAX # define FELEM_MIN INT16_MIN # define OUT(d, v) v = (v + (1<<(FILTER_SHIFT-1)))>>FILTER_SHIFT;\ d = (unsigned)(v + 32768) > 65535 ? (v>>31) ^ 32767 : v # if defined(TEMPLATE_RESAMPLE_S16) # define RENAME(N) N ## _int16 # elif defined(TEMPLATE_RESAMPLE_S16_MMX2) # define COMMON_CORE COMMON_CORE_INT16_MMX2 # define LINEAR_CORE LINEAR_CORE_INT16_MMX2 # define RENAME(N) N ## _int16_mmx2 # elif defined(TEMPLATE_RESAMPLE_S16_SSE2) # define COMMON_CORE COMMON_CORE_INT16_SSE2 # define LINEAR_CORE LINEAR_CORE_INT16_SSE2 # define RENAME(N) N ## _int16_sse2 # endif #endif #if DO_RESAMPLE_ONE static void RENAME(resample_one)(DELEM *dst, const DELEM *src, int dst_size, int64_t index2, int64_t incr) { int dst_index; for (dst_index = 0; dst_index < dst_size; dst_index++) { dst[dst_index] = src[index2 >> 32]; index2 += incr; } } #endif int RENAME(swri_resample_common)(ResampleContext *c, DELEM *dst, const DELEM *src, int n, int update_ctx) { int dst_index; int index= c->index; int frac= c->frac; int sample_index = index >> c->phase_shift; index &= c->phase_mask; for (dst_index = 0; dst_index < n; dst_index++) { FELEM *filter = ((FELEM *) c->filter_bank) + c->filter_alloc * index; #ifdef COMMON_CORE COMMON_CORE #else FELEM2 val=0; int i; for (i = 0; i < c->filter_length; i++) { val += src[sample_index + i] * (FELEM2)filter[i]; } OUT(dst[dst_index], val); #endif frac += c->dst_incr_mod; index += c->dst_incr_div; if (frac >= c->src_incr) { frac -= c->src_incr; index++; } sample_index += index >> c->phase_shift; index &= c->phase_mask; } if(update_ctx){ c->frac= frac; c->index= index; } return sample_index; } int RENAME(swri_resample_linear)(ResampleContext *c, DELEM *dst, const DELEM *src, int n, int update_ctx) { int dst_index; int index= c->index; int frac= c->frac; int dst_incr_frac= c->dst_incr % c->src_incr; int dst_incr= c->dst_incr / c->src_incr; int sample_index = index >> c->phase_shift; index &= c->phase_mask; for (dst_index = 0; dst_index < n; dst_index++) { FELEM *filter = ((FELEM *) c->filter_bank) + c->filter_alloc * index; FELEM2 val=0, v2 = 0; #ifdef LINEAR_CORE LINEAR_CORE #else int i; for (i = 0; i < c->filter_length; i++) { val += src[sample_index + i] * (FELEM2)filter[i]; v2 += src[sample_index + i] * (FELEM2)filter[i + c->filter_alloc]; } #endif val += (v2 - val) * (FELEML) frac / c->src_incr; OUT(dst[dst_index], val); frac += dst_incr_frac; index += dst_incr; if (frac >= c->src_incr) { frac -= c->src_incr; index++; } sample_index += index >> c->phase_shift; index &= c->phase_mask; } if(update_ctx){ c->frac= frac; c->index= index; } return sample_index; } #undef COMMON_CORE #undef LINEAR_CORE #undef RENAME #undef FILTER_SHIFT #undef DELEM #undef FELEM #undef FELEM2 #undef FELEML #undef FELEM_MAX #undef FELEM_MIN #undef OUT