ffmpeg/libswresample/audioconvert.c

   1 /*
   2  * audio conversion
   3  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file
  24  * audio conversion
  25  * @author Michael Niedermayer <michaelni@gmx.at>
  26  */
  27
  28 #include "libavutil/avstring.h"
  29 #include "libavutil/avassert.h"
  30 #include "libavutil/libm.h"
  31 #include "libavutil/samplefmt.h"
  32 #include "audioconvert.h"
  33
  34
  35 #define CONV_FUNC_NAME(dst_fmt, src_fmt) conv_ ## src_fmt ## _to_ ## dst_fmt
  36
  37 //FIXME rounding ?
  38 #define CONV_FUNC(ofmt, otype, ifmt, expr)\
  39 static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end)\
  40 {\
  41     uint8_t *end2 = end - 3*os;\
  42     while(po < end2){\
  43         *(otype*)po = expr; pi += is; po += os;\
  44         *(otype*)po = expr; pi += is; po += os;\
  45         *(otype*)po = expr; pi += is; po += os;\
  46         *(otype*)po = expr; pi += is; po += os;\
  47     }\
  48     while(po < end){\
  49         *(otype*)po = expr; pi += is; po += os;\
  50     }\
  51 }
  52
  53 //FIXME put things below under ifdefs so we do not waste space for cases no codec will need
  54 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_U8 ,  *(const uint8_t*)pi)
  55 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80U)<<8)
  56 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80U)<<24)
  57 CONV_FUNC(AV_SAMPLE_FMT_FLT, float  , AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0f/ (1<<7)))
  58 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
  59 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_S16, (*(const int16_t*)pi>>8) + 0x80)
  60 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S16,  *(const int16_t*)pi)
  61 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S16,  *(const int16_t*)pi<<16)
  62 CONV_FUNC(AV_SAMPLE_FMT_FLT, float  , AV_SAMPLE_FMT_S16,  *(const int16_t*)pi*(1.0f/ (1<<15)))
  63 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_S16,  *(const int16_t*)pi*(1.0 / (1<<15)))
  64 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_S32, (*(const int32_t*)pi>>24) + 0x80)
  65 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S32,  *(const int32_t*)pi>>16)
  66 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S32,  *(const int32_t*)pi)
  67 CONV_FUNC(AV_SAMPLE_FMT_FLT, float  , AV_SAMPLE_FMT_S32,  *(const int32_t*)pi*(1.0f/ (1U<<31)))
  68 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_S32,  *(const int32_t*)pi*(1.0 / (1U<<31)))
  69 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(  lrintf(*(const float*)pi * (1<<7)) + 0x80))
  70 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(  lrintf(*(const float*)pi * (1<<15))))
  71 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float*)pi * (1U<<31))))
  72 CONV_FUNC(AV_SAMPLE_FMT_FLT, float  , AV_SAMPLE_FMT_FLT, *(const float*)pi)
  73 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_FLT, *(const float*)pi)
  74 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(  lrint(*(const double*)pi * (1<<7)) + 0x80))
  75 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(  lrint(*(const double*)pi * (1<<15))))
  76 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double*)pi * (1U<<31))))
  77 CONV_FUNC(AV_SAMPLE_FMT_FLT, float  , AV_SAMPLE_FMT_DBL, *(const double*)pi)
  78 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_DBL, *(const double*)pi)
  79
  80 #define FMT_PAIR_FUNC(out, in) [(out) + AV_SAMPLE_FMT_NB*(in)] = CONV_FUNC_NAME(out, in)
  81
  82 static conv_func_type * const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB*AV_SAMPLE_FMT_NB] = {
  83     FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_U8 ),
  84     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8 ),
  85     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8 ),
  86     FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8 ),
  87     FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8 ),
  88     FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_S16),
  89     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16),
  90     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16),
  91     FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16),
  92     FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16),
  93     FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_S32),
  94     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32),
  95     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32),
  96     FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32),
  97     FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32),
  98     FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_FLT),
  99     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT),
 100     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT),
 101     FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT),
 102     FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT),
 103     FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_DBL),
 104     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL),
 105     FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL),
 106     FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL),
 107     FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL),
 108 };
 109
 110 static void cpy1(uint8_t **dst, const uint8_t **src, int len){
 111     memcpy(*dst, *src, len);
 112 }
 113 static void cpy2(uint8_t **dst, const uint8_t **src, int len){
 114     memcpy(*dst, *src, 2*len);
 115 }
 116 static void cpy4(uint8_t **dst, const uint8_t **src, int len){
 117     memcpy(*dst, *src, 4*len);
 118 }
 119 static void cpy8(uint8_t **dst, const uint8_t **src, int len){
 120     memcpy(*dst, *src, 8*len);
 121 }
 122
 123 AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt,
 124                                        enum AVSampleFormat in_fmt,
 125                                        int channels, const int *ch_map,
 126                                        int flags)
 127 {
 128     AudioConvert *ctx;
 129     conv_func_type *f = fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt) + AV_SAMPLE_FMT_NB*av_get_packed_sample_fmt(in_fmt)];
 130
 131     if (!f)
 132         return NULL;
 133     ctx = av_mallocz(sizeof(*ctx));
 134     if (!ctx)
 135         return NULL;
 136
 137     if(channels == 1){
 138          in_fmt = av_get_planar_sample_fmt( in_fmt);
 139         out_fmt = av_get_planar_sample_fmt(out_fmt);
 140     }
 141
 142     ctx->channels = channels;
 143     ctx->conv_f   = f;
 144     ctx->ch_map   = ch_map;
 145     if (in_fmt == AV_SAMPLE_FMT_U8 || in_fmt == AV_SAMPLE_FMT_U8P)
 146         memset(ctx->silence, 0x80, sizeof(ctx->silence));
 147
 148     if(out_fmt == in_fmt && !ch_map) {
 149         switch(av_get_bytes_per_sample(in_fmt)){
 150             case 1:ctx->simd_f = cpy1; break;
 151             case 2:ctx->simd_f = cpy2; break;
 152             case 4:ctx->simd_f = cpy4; break;
 153             case 8:ctx->simd_f = cpy8; break;
 154         }
 155     }
 156
 157     if(HAVE_YASM && HAVE_MMX) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);
 158     if(ARCH_ARM)              swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);
 159     if(ARCH_AARCH64)          swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);
 160
 161     return ctx;
 162 }
 163
 164 void swri_audio_convert_free(AudioConvert **ctx)
 165 {
 166     av_freep(ctx);
 167 }
 168
 169 int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len)
 170 {
 171     int ch;
 172     int off=0;
 173     const int os= (out->planar ? 1 :out->ch_count) *out->bps;
 174     unsigned misaligned = 0;
 175
 176     av_assert0(ctx->channels == out->ch_count);
 177
 178     if (ctx->in_simd_align_mask) {
 179         int planes = in->planar ? in->ch_count : 1;
 180         unsigned m = 0;
 181         for (ch = 0; ch < planes; ch++)
 182             m |= (intptr_t)in->ch[ch];
 183         misaligned |= m & ctx->in_simd_align_mask;
 184     }
 185     if (ctx->out_simd_align_mask) {
 186         int planes = out->planar ? out->ch_count : 1;
 187         unsigned m = 0;
 188         for (ch = 0; ch < planes; ch++)
 189             m |= (intptr_t)out->ch[ch];
 190         misaligned |= m & ctx->out_simd_align_mask;
 191     }
 192
 193     //FIXME optimize common cases
 194
 195     if(ctx->simd_f && !ctx->ch_map && !misaligned){
 196         off = len&~15;
 197         av_assert1(off>=0);
 198         av_assert1(off<=len);
 199         av_assert2(ctx->channels == SWR_CH_MAX || !in->ch[ctx->channels]);
 200         if(off>0){
 201             if(out->planar == in->planar){
 202                 int planes = out->planar ? out->ch_count : 1;
 203                 for(ch=0; ch<planes; ch++){
 204                     ctx->simd_f(out->ch+ch, (const uint8_t **)in->ch+ch, off * (out->planar ? 1 :out->ch_count));
 205                 }
 206             }else{
 207                 ctx->simd_f(out->ch, (const uint8_t **)in->ch, off);
 208             }
 209         }
 210         if(off == len)
 211             return 0;
 212     }
 213
 214     for(ch=0; ch<ctx->channels; ch++){
 215         const int ich= ctx->ch_map ? ctx->ch_map[ch] : ch;
 216         const int is= ich < 0 ? 0 : (in->planar ? 1 : in->ch_count) * in->bps;
 217         const uint8_t *pi= ich < 0 ? ctx->silence : in->ch[ich];
 218         uint8_t       *po= out->ch[ch];
 219         uint8_t *end= po + os*len;
 220         if(!po)
 221             continue;
 222         ctx->conv_f(po+off*os, pi+off*is, is, os, end);
 223     }
 224     return 0;
 225 }