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   1 /*
   2  * Copyright (C) 2011 Michael Niedermayer (michaelni@gmx.at)
   3  *
   4  * This file is part of libswresample
   5  *
   6  * libswresample is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * libswresample is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with libswresample; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "libavutil/avassert.h"
  22 #include "libavutil/common.h"
  23 #include "libavutil/audioconvert.h"
  24 #include "libavutil/opt.h"
  25 #include "swresample.h"
  26 #undef fprintf
  27
  28 #define SAMPLES 1000
  29
  30 #define ASSERT_LEVEL 2
  31
  32 static double get(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f){
  33     const uint8_t *p;
  34     if(av_sample_fmt_is_planar(f)){
  35         f= av_get_alt_sample_fmt(f, 0);
  36         p= a[ch];
  37     }else{
  38         p= a[0];
  39         index= ch + index*ch_count;
  40     }
  41
  42     switch(f){
  43     case AV_SAMPLE_FMT_U8 : return ((const uint8_t*)p)[index]/255.0*2-1.0;
  44     case AV_SAMPLE_FMT_S16: return ((const int16_t*)p)[index]/32767.0;
  45     case AV_SAMPLE_FMT_S32: return ((const int32_t*)p)[index]/2147483647.0;
  46     case AV_SAMPLE_FMT_FLT: return ((const float  *)p)[index];
  47     case AV_SAMPLE_FMT_DBL: return ((const double *)p)[index];
  48     default: av_assert0(0);
  49     }
  50 }
  51
  52 static void  set(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f, double v){
  53     uint8_t *p;
  54     if(av_sample_fmt_is_planar(f)){
  55         f= av_get_alt_sample_fmt(f, 0);
  56         p= a[ch];
  57     }else{
  58         p= a[0];
  59         index= ch + index*ch_count;
  60     }
  61     switch(f){
  62     case AV_SAMPLE_FMT_U8 : ((uint8_t*)p)[index]= (v+1.0)*255.0/2; break;
  63     case AV_SAMPLE_FMT_S16: ((int16_t*)p)[index]= v*32767;         break;
  64     case AV_SAMPLE_FMT_S32: ((int32_t*)p)[index]= v*2147483647;    break;
  65     case AV_SAMPLE_FMT_FLT: ((float  *)p)[index]= v;               break;
  66     case AV_SAMPLE_FMT_DBL: ((double *)p)[index]= v;               break;
  67     default: av_assert2(0);
  68     }
  69 }
  70
  71 static void shift(uint8_t *a[], int index, int ch_count, enum AVSampleFormat f){
  72     int ch;
  73
  74     if(av_sample_fmt_is_planar(f)){
  75         f= av_get_alt_sample_fmt(f, 0);
  76         for(ch= 0; ch<ch_count; ch++)
  77             a[ch] += index*av_get_bytes_per_sample(f);
  78     }else{
  79         a[0] += index*ch_count*av_get_bytes_per_sample(f);
  80     }
  81 }
  82
  83 uint64_t layouts[]={
  84 AV_CH_LAYOUT_MONO                    ,
  85 AV_CH_LAYOUT_STEREO                  ,
  86 AV_CH_LAYOUT_2_1                     ,
  87 AV_CH_LAYOUT_SURROUND                ,
  88 AV_CH_LAYOUT_4POINT0                 ,
  89 AV_CH_LAYOUT_2_2                     ,
  90 AV_CH_LAYOUT_QUAD                    ,
  91 AV_CH_LAYOUT_5POINT0                 ,
  92 AV_CH_LAYOUT_5POINT1                 ,
  93 AV_CH_LAYOUT_5POINT0_BACK            ,
  94 AV_CH_LAYOUT_5POINT1_BACK            ,
  95 AV_CH_LAYOUT_7POINT0                 ,
  96 AV_CH_LAYOUT_7POINT1                 ,
  97 AV_CH_LAYOUT_7POINT1_WIDE            ,
  98 0
  99 };
 100
 101 static void setup_array(uint8_t *out[SWR_CH_MAX], uint8_t *in, enum AVSampleFormat format, int samples){
 102     if(av_sample_fmt_is_planar(format)){
 103         int i;
 104         int plane_size= av_get_bytes_per_sample(format&0xFF)*samples;
 105         format&=0xFF;
 106         for(i=0; i<SWR_CH_MAX; i++){
 107             out[i]= in + i*plane_size;
 108         }
 109     }else{
 110         out[0]= in;
 111     }
 112 }
 113
 114 int main(int argc, char **argv){
 115     int in_sample_rate, out_sample_rate, ch ,i, in_ch_layout_index, out_ch_layout_index, osr, flush_count;
 116     uint64_t in_ch_layout, out_ch_layout;
 117     enum AVSampleFormat in_sample_fmt, out_sample_fmt;
 118     int sample_rates[]={8000,11025,16000,22050,32000};
 119     uint8_t array_in[SAMPLES*8*8];
 120     uint8_t array_mid[SAMPLES*8*8*3];
 121     uint8_t array_out[SAMPLES*8*8+100];
 122     uint8_t *ain[SWR_CH_MAX];
 123     uint8_t *aout[SWR_CH_MAX];
 124     uint8_t *amid[SWR_CH_MAX];
 125     int flush_i=0;
 126     int mode = 0;
 127
 128     struct SwrContext * forw_ctx= NULL;
 129     struct SwrContext *backw_ctx= NULL;
 130
 131     in_sample_rate=16000;
 132     for(osr=0; osr<5; osr++){
 133         out_sample_rate= sample_rates[osr];
 134         for(in_sample_fmt= AV_SAMPLE_FMT_U8; in_sample_fmt<=AV_SAMPLE_FMT_DBL; in_sample_fmt++){
 135             for(out_sample_fmt= AV_SAMPLE_FMT_U8; out_sample_fmt<=AV_SAMPLE_FMT_DBL; out_sample_fmt++){
 136                 for(in_ch_layout_index=0; layouts[in_ch_layout_index]; in_ch_layout_index++){
 137                     int in_ch_count;
 138                     in_ch_layout= layouts[in_ch_layout_index];
 139                     in_ch_count= av_get_channel_layout_nb_channels(in_ch_layout);
 140                     for(out_ch_layout_index=0; layouts[out_ch_layout_index]; out_ch_layout_index++){
 141                         int out_count, mid_count, out_ch_count;
 142                         out_ch_layout= layouts[out_ch_layout_index];
 143                         out_ch_count= av_get_channel_layout_nb_channels(out_ch_layout);
 144                         fprintf(stderr, "ch %d->%d, rate:%5d->%5d, fmt:%s->%s\n",
 145                                in_ch_count, out_ch_count,
 146                                in_sample_rate, out_sample_rate,
 147                                av_get_sample_fmt_name(in_sample_fmt), av_get_sample_fmt_name(out_sample_fmt));
 148                         forw_ctx  = swr_alloc_set_opts(forw_ctx, out_ch_layout, av_get_alt_sample_fmt(out_sample_fmt, 1), out_sample_rate,
 149                                                                   in_ch_layout, av_get_alt_sample_fmt( in_sample_fmt, 1),  in_sample_rate,
 150                                                        0, 0);
 151                         backw_ctx = swr_alloc_set_opts(backw_ctx, in_ch_layout,  in_sample_fmt,             in_sample_rate,
 152                                                                  out_ch_layout, av_get_alt_sample_fmt(out_sample_fmt, 1), out_sample_rate,
 153                                                        0, 0);
 154                         if(swr_init( forw_ctx) < 0)
 155                             fprintf(stderr, "swr_init(->) failed\n");
 156                         if(swr_init(backw_ctx) < 0)
 157                             fprintf(stderr, "swr_init(<-) failed\n");
 158                         if(!forw_ctx)
 159                             fprintf(stderr, "Failed to init forw_cts\n");
 160                         if(!backw_ctx)
 161                             fprintf(stderr, "Failed to init backw_ctx\n");
 162                                //FIXME test planar
 163                         setup_array(ain , array_in , av_get_alt_sample_fmt( in_sample_fmt, 1),   SAMPLES);
 164                         setup_array(amid, array_mid, av_get_alt_sample_fmt(out_sample_fmt, 1), 3*SAMPLES);
 165                         setup_array(aout, array_out,  in_sample_fmt           ,   SAMPLES);
 166                         for(ch=0; ch<in_ch_count; ch++){
 167                             for(i=0; i<SAMPLES; i++)
 168                                 set(ain, ch, i, in_ch_count, av_get_alt_sample_fmt(in_sample_fmt, 1), sin(i*i*3/SAMPLES));
 169                         }
 170                         mode++;
 171                         mode%=3;
 172                         if(mode==0 /*|| out_sample_rate == in_sample_rate*/) {
 173                             mid_count= swr_convert(forw_ctx, amid, 3*SAMPLES, ain, SAMPLES);
 174                         } else if(mode==1){
 175                             mid_count= swr_convert(forw_ctx, amid,         0, ain, SAMPLES);
 176                             mid_count+=swr_convert(forw_ctx, amid, 3*SAMPLES, ain,       0);
 177                         } else {
 178                             int tmp_count;
 179                             mid_count= swr_convert(forw_ctx, amid,         0, ain,       1);
 180                             av_assert0(mid_count==0);
 181                             shift(ain,  1, in_ch_count, av_get_alt_sample_fmt(in_sample_fmt, 1));
 182                             mid_count+=swr_convert(forw_ctx, amid, 3*SAMPLES, ain,       0);
 183                             shift(amid,  mid_count, out_ch_count, av_get_alt_sample_fmt(out_sample_fmt, 1)); tmp_count = mid_count;
 184                             mid_count+=swr_convert(forw_ctx, amid,         2, ain,       2);
 185                             shift(amid,  mid_count-tmp_count, out_ch_count, av_get_alt_sample_fmt(out_sample_fmt, 1)); tmp_count = mid_count;
 186                             shift(ain,  2, in_ch_count, av_get_alt_sample_fmt(in_sample_fmt, 1));
 187                             mid_count+=swr_convert(forw_ctx, amid,         1, ain, SAMPLES-3);
 188                             shift(amid,  mid_count-tmp_count, out_ch_count, av_get_alt_sample_fmt(out_sample_fmt, 1)); tmp_count = mid_count;
 189                             shift(ain, -3, in_ch_count, av_get_alt_sample_fmt(in_sample_fmt, 1));
 190                             mid_count+=swr_convert(forw_ctx, amid, 3*SAMPLES, ain,       0);
 191                             shift(amid,  -tmp_count, out_ch_count, av_get_alt_sample_fmt(out_sample_fmt, 1));
 192                         }
 193                         out_count= swr_convert(backw_ctx,aout, SAMPLES, amid, mid_count);
 194
 195                         for(ch=0; ch<in_ch_count; ch++){
 196                             double sse, x, maxdiff=0;
 197                             double sum_a= 0;
 198                             double sum_b= 0;
 199                             double sum_aa= 0;
 200                             double sum_bb= 0;
 201                             double sum_ab= 0;
 202                             for(i=0; i<out_count; i++){
 203                                 double a= get(ain , ch, i, in_ch_count, av_get_alt_sample_fmt(in_sample_fmt, 1));
 204                                 double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
 205                                 sum_a += a;
 206                                 sum_b += b;
 207                                 sum_aa+= a*a;
 208                                 sum_bb+= b*b;
 209                                 sum_ab+= a*b;
 210                                 maxdiff= FFMAX(maxdiff, FFABS(a-b));
 211                             }
 212                             x = sum_ab/sum_bb;
 213                             sse= sum_aa + sum_bb*x*x - 2*x*sum_ab;
 214
 215                             fprintf(stderr, "[%f %f %f] len:%5d\n", sqrt(sse/out_count), x, maxdiff, out_count);
 216                         }
 217
 218                         flush_i++;
 219                         flush_i%=21;
 220                         flush_count = swr_convert(backw_ctx,aout, flush_i, 0, 0);
 221                         shift(aout,  flush_i, in_ch_count, in_sample_fmt);
 222                         flush_count+= swr_convert(backw_ctx,aout, SAMPLES-flush_i, 0, 0);
 223                         shift(aout, -flush_i, in_ch_count, in_sample_fmt);
 224                         if(flush_count){
 225                             for(ch=0; ch<in_ch_count; ch++){
 226                                 double sse, x, maxdiff=0;
 227                                 double sum_a= 0;
 228                                 double sum_b= 0;
 229                                 double sum_aa= 0;
 230                                 double sum_bb= 0;
 231                                 double sum_ab= 0;
 232                                 for(i=0; i<flush_count; i++){
 233                                     double a= get(ain , ch, i+out_count, in_ch_count, av_get_alt_sample_fmt(in_sample_fmt, 1));
 234                                     double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
 235                                     sum_a += a;
 236                                     sum_b += b;
 237                                     sum_aa+= a*a;
 238                                     sum_bb+= b*b;
 239                                     sum_ab+= a*b;
 240                                     maxdiff= FFMAX(maxdiff, FFABS(a-b));
 241                                 }
 242                                 x = sum_ab/sum_bb;
 243                                 sse= sum_aa + sum_bb*x*x - 2*x*sum_ab;
 244
 245                                 fprintf(stderr, "[%f %f %f] len:%5d F:%3d\n", sqrt(sse/flush_count), x, maxdiff, flush_count, flush_i);
 246                             }
 247                         }
 248
 249
 250                         fprintf(stderr, "\n");
 251                     }
 252                 }
 253             }
 254         }
 255     }
 256
 257     return 0;
 258 }