LCOV - code coverage report
Current view: top level - src/libswresample - swresample.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 453 595 76.1 %
Date: 2017-01-19 23:52:33 Functions: 24 26 92.3 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (C) 2011-2013 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
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (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 GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License 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/opt.h"
      22             : #include "swresample_internal.h"
      23             : #include "audioconvert.h"
      24             : #include "libavutil/avassert.h"
      25             : #include "libavutil/channel_layout.h"
      26             : #include "libavutil/internal.h"
      27             : 
      28             : #include <float.h>
      29             : 
      30             : #define ALIGN 32
      31             : 
      32             : #include "libavutil/ffversion.h"
      33             : const char swr_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
      34             : 
      35        5120 : unsigned swresample_version(void)
      36             : {
      37             :     av_assert0(LIBSWRESAMPLE_VERSION_MICRO >= 100);
      38        5120 :     return LIBSWRESAMPLE_VERSION_INT;
      39             : }
      40             : 
      41        5120 : const char *swresample_configuration(void)
      42             : {
      43        5120 :     return FFMPEG_CONFIGURATION;
      44             : }
      45             : 
      46           0 : const char *swresample_license(void)
      47             : {
      48             : #define LICENSE_PREFIX "libswresample license: "
      49           0 :     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
      50             : }
      51             : 
      52           4 : int swr_set_channel_mapping(struct SwrContext *s, const int *channel_map){
      53           4 :     if(!s || s->in_convert) // s needs to be allocated but not initialized
      54           0 :         return AVERROR(EINVAL);
      55           4 :     s->channel_map = channel_map;
      56           4 :     return 0;
      57             : }
      58             : 
      59        1064 : struct SwrContext *swr_alloc_set_opts(struct SwrContext *s,
      60             :                                       int64_t out_ch_layout, enum AVSampleFormat out_sample_fmt, int out_sample_rate,
      61             :                                       int64_t  in_ch_layout, enum AVSampleFormat  in_sample_fmt, int  in_sample_rate,
      62             :                                       int log_offset, void *log_ctx){
      63        1064 :     if(!s) s= swr_alloc();
      64        1064 :     if(!s) return NULL;
      65             : 
      66        1064 :     s->log_level_offset= log_offset;
      67        1064 :     s->log_ctx= log_ctx;
      68             : 
      69        1064 :     if (av_opt_set_int(s, "ocl", out_ch_layout,   0) < 0)
      70           0 :         goto fail;
      71             : 
      72        1064 :     if (av_opt_set_int(s, "osf", out_sample_fmt,  0) < 0)
      73           0 :         goto fail;
      74             : 
      75        1064 :     if (av_opt_set_int(s, "osr", out_sample_rate, 0) < 0)
      76           0 :         goto fail;
      77             : 
      78        1064 :     if (av_opt_set_int(s, "icl", in_ch_layout,    0) < 0)
      79           0 :         goto fail;
      80             : 
      81        1064 :     if (av_opt_set_int(s, "isf", in_sample_fmt,   0) < 0)
      82           0 :         goto fail;
      83             : 
      84        1064 :     if (av_opt_set_int(s, "isr", in_sample_rate,  0) < 0)
      85           0 :         goto fail;
      86             : 
      87        1064 :     if (av_opt_set_int(s, "tsf", AV_SAMPLE_FMT_NONE,   0) < 0)
      88           0 :         goto fail;
      89             : 
      90        1064 :     if (av_opt_set_int(s, "ich", av_get_channel_layout_nb_channels(s-> user_in_ch_layout), 0) < 0)
      91           0 :         goto fail;
      92             : 
      93        1064 :     if (av_opt_set_int(s, "och", av_get_channel_layout_nb_channels(s->user_out_ch_layout), 0) < 0)
      94           0 :         goto fail;
      95             : 
      96        1064 :     av_opt_set_int(s, "uch", 0, 0);
      97        1064 :     return s;
      98             : fail:
      99           0 :     av_log(s, AV_LOG_ERROR, "Failed to set option\n");
     100           0 :     swr_free(&s);
     101           0 :     return NULL;
     102             : }
     103             : 
     104        4422 : static void set_audiodata_fmt(AudioData *a, enum AVSampleFormat fmt){
     105        4422 :     a->fmt   = fmt;
     106        4422 :     a->bps   = av_get_bytes_per_sample(fmt);
     107        4422 :     a->planar= av_sample_fmt_is_planar(fmt);
     108        4422 :     if (a->ch_count == 1)
     109        3425 :         a->planar = 1;
     110        4422 : }
     111             : 
     112       17664 : static void free_temp(AudioData *a){
     113       17664 :     av_free(a->data);
     114       17664 :     memset(a, 0, sizeof(*a));
     115       17664 : }
     116             : 
     117        2208 : static void clear_context(SwrContext *s){
     118        2208 :     s->in_buffer_index= 0;
     119        2208 :     s->in_buffer_count= 0;
     120        2208 :     s->resample_in_constraint= 0;
     121        2208 :     memset(s->in.ch, 0, sizeof(s->in.ch));
     122        2208 :     memset(s->out.ch, 0, sizeof(s->out.ch));
     123        2208 :     free_temp(&s->postin);
     124        2208 :     free_temp(&s->midbuf);
     125        2208 :     free_temp(&s->preout);
     126        2208 :     free_temp(&s->in_buffer);
     127        2208 :     free_temp(&s->silence);
     128        2208 :     free_temp(&s->drop_temp);
     129        2208 :     free_temp(&s->dither.noise);
     130        2208 :     free_temp(&s->dither.temp);
     131        2208 :     swri_audio_convert_free(&s-> in_convert);
     132        2208 :     swri_audio_convert_free(&s->out_convert);
     133        2208 :     swri_audio_convert_free(&s->full_convert);
     134        2208 :     swri_rematrix_free(s);
     135             : 
     136        2208 :     s->delayed_samples_fixup = 0;
     137        2208 :     s->flushed = 0;
     138        2208 : }
     139             : 
     140        1106 : av_cold void swr_free(SwrContext **ss){
     141        1106 :     SwrContext *s= *ss;
     142        1106 :     if(s){
     143        1105 :         clear_context(s);
     144        1105 :         if (s->resampler)
     145        1073 :             s->resampler->free(&s->resample);
     146             :     }
     147             : 
     148        1106 :     av_freep(ss);
     149        1106 : }
     150             : 
     151          17 : av_cold void swr_close(SwrContext *s){
     152          17 :     clear_context(s);
     153          17 : }
     154             : 
     155        1086 : av_cold int swr_init(struct SwrContext *s){
     156             :     int ret;
     157             :     char l1[1024], l2[1024];
     158             : 
     159        1086 :     clear_context(s);
     160             : 
     161        1086 :     if(s-> in_sample_fmt >= AV_SAMPLE_FMT_NB){
     162           0 :         av_log(s, AV_LOG_ERROR, "Requested input sample format %d is invalid\n", s->in_sample_fmt);
     163           0 :         return AVERROR(EINVAL);
     164             :     }
     165        1086 :     if(s->out_sample_fmt >= AV_SAMPLE_FMT_NB){
     166           0 :         av_log(s, AV_LOG_ERROR, "Requested output sample format %d is invalid\n", s->out_sample_fmt);
     167           0 :         return AVERROR(EINVAL);
     168             :     }
     169             : 
     170        1086 :     s->out.ch_count  = s-> user_out_ch_count;
     171        1086 :     s-> in.ch_count  = s->  user_in_ch_count;
     172        1086 :     s->used_ch_count = s->user_used_ch_count;
     173             : 
     174        1086 :     s-> in_ch_layout = s-> user_in_ch_layout;
     175        1086 :     s->out_ch_layout = s->user_out_ch_layout;
     176             : 
     177        1086 :     s->int_sample_fmt= s->user_int_sample_fmt;
     178             : 
     179        1086 :     s->dither.method = s->user_dither_method;
     180             : 
     181        1086 :     if(av_get_channel_layout_nb_channels(s-> in_ch_layout) > SWR_CH_MAX) {
     182           0 :         av_log(s, AV_LOG_WARNING, "Input channel layout 0x%"PRIx64" is invalid or unsupported.\n", s-> in_ch_layout);
     183           0 :         s->in_ch_layout = 0;
     184             :     }
     185             : 
     186        1086 :     if(av_get_channel_layout_nb_channels(s->out_ch_layout) > SWR_CH_MAX) {
     187           0 :         av_log(s, AV_LOG_WARNING, "Output channel layout 0x%"PRIx64" is invalid or unsupported.\n", s->out_ch_layout);
     188           0 :         s->out_ch_layout = 0;
     189             :     }
     190             : 
     191        1086 :     switch(s->engine){
     192             : #if CONFIG_LIBSOXR
     193             :         case SWR_ENGINE_SOXR: s->resampler = &swri_soxr_resampler; break;
     194             : #endif
     195        1086 :         case SWR_ENGINE_SWR : s->resampler = &swri_resampler; break;
     196             :         default:
     197           0 :             av_log(s, AV_LOG_ERROR, "Requested resampling engine is unavailable\n");
     198           0 :             return AVERROR(EINVAL);
     199             :     }
     200             : 
     201        1086 :     if(!s->used_ch_count)
     202        1082 :         s->used_ch_count= s->in.ch_count;
     203             : 
     204        1086 :     if(s->used_ch_count && s-> in_ch_layout && s->used_ch_count != av_get_channel_layout_nb_channels(s-> in_ch_layout)){
     205           0 :         av_log(s, AV_LOG_WARNING, "Input channel layout has a different number of channels than the number of used channels, ignoring layout\n");
     206           0 :         s-> in_ch_layout= 0;
     207             :     }
     208             : 
     209        1086 :     if(!s-> in_ch_layout)
     210           3 :         s-> in_ch_layout= av_get_default_channel_layout(s->used_ch_count);
     211        1086 :     if(!s->out_ch_layout)
     212           2 :         s->out_ch_layout= av_get_default_channel_layout(s->out.ch_count);
     213             : 
     214        2162 :     s->rematrix= s->out_ch_layout  !=s->in_ch_layout || s->rematrix_volume!=1.0 ||
     215        1076 :                  s->rematrix_custom;
     216             : 
     217        1086 :     if(s->int_sample_fmt == AV_SAMPLE_FMT_NONE){
     218        1086 :         if(   av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
     219         556 :            && av_get_bytes_per_sample(s->out_sample_fmt) <= 2){
     220         310 :             s->int_sample_fmt= AV_SAMPLE_FMT_S16P;
     221         776 :         }else if(   av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
     222         246 :            && !s->rematrix
     223         245 :            && s->out_sample_rate==s->in_sample_rate
     224          55 :            && !(s->flags & SWR_FLAG_RESAMPLE)){
     225          55 :             s->int_sample_fmt= AV_SAMPLE_FMT_S16P;
     226         721 :         }else if(   av_get_planar_sample_fmt(s-> in_sample_fmt) == AV_SAMPLE_FMT_S32P
     227         127 :                  && av_get_planar_sample_fmt(s->out_sample_fmt) == AV_SAMPLE_FMT_S32P
     228          37 :                  && !s->rematrix
     229          37 :                  && s->engine != SWR_ENGINE_SOXR){
     230          37 :             s->int_sample_fmt= AV_SAMPLE_FMT_S32P;
     231         684 :         }else if(av_get_bytes_per_sample(s->in_sample_fmt) <= 4){
     232         600 :             s->int_sample_fmt= AV_SAMPLE_FMT_FLTP;
     233             :         }else{
     234          84 :             s->int_sample_fmt= AV_SAMPLE_FMT_DBLP;
     235             :         }
     236             :     }
     237        1086 :     av_log(s, AV_LOG_DEBUG, "Using %s internally between filters\n", av_get_sample_fmt_name(s->int_sample_fmt));
     238             : 
     239        1086 :     if(   s->int_sample_fmt != AV_SAMPLE_FMT_S16P
     240         721 :         &&s->int_sample_fmt != AV_SAMPLE_FMT_S32P
     241         684 :         &&s->int_sample_fmt != AV_SAMPLE_FMT_S64P
     242         684 :         &&s->int_sample_fmt != AV_SAMPLE_FMT_FLTP
     243          84 :         &&s->int_sample_fmt != AV_SAMPLE_FMT_DBLP){
     244           0 :         av_log(s, AV_LOG_ERROR, "Requested sample format %s is not supported internally, S16/S32/S64/FLT/DBL is supported\n", av_get_sample_fmt_name(s->int_sample_fmt));
     245           0 :         return AVERROR(EINVAL);
     246             :     }
     247             : 
     248        1086 :     set_audiodata_fmt(&s-> in, s-> in_sample_fmt);
     249        1086 :     set_audiodata_fmt(&s->out, s->out_sample_fmt);
     250             : 
     251        1086 :     if (s->firstpts_in_samples != AV_NOPTS_VALUE) {
     252          53 :         if (!s->async && s->min_compensation >= FLT_MAX/2)
     253           0 :             s->async = 1;
     254          53 :         s->firstpts =
     255          53 :         s->outpts   = s->firstpts_in_samples * s->out_sample_rate;
     256             :     } else
     257        1033 :         s->firstpts = AV_NOPTS_VALUE;
     258             : 
     259        1086 :     if (s->async) {
     260          52 :         if (s->min_compensation >= FLT_MAX/2)
     261          52 :             s->min_compensation = 0.001;
     262          52 :         if (s->async > 1.0001) {
     263          52 :             s->max_soft_compensation = s->async / (double) s->in_sample_rate;
     264             :         }
     265             :     }
     266             : 
     267        1086 :     if (s->out_sample_rate!=s->in_sample_rate || (s->flags & SWR_FLAG_RESAMPLE)){
     268         555 :         s->resample = s->resampler->init(s->resample, s->out_sample_rate, s->in_sample_rate, s->filter_size, s->phase_shift, s->linear_interp, s->cutoff, s->int_sample_fmt, s->filter_type, s->kaiser_beta, s->precision, s->cheby, s->exact_rational);
     269        1110 :         if (!s->resample) {
     270           0 :             av_log(s, AV_LOG_ERROR, "Failed to initialize resampler\n");
     271           0 :             return AVERROR(ENOMEM);
     272             :         }
     273             :     }else
     274         531 :         s->resampler->free(&s->resample);
     275        1086 :     if(    s->int_sample_fmt != AV_SAMPLE_FMT_S16P
     276         721 :         && s->int_sample_fmt != AV_SAMPLE_FMT_S32P
     277         684 :         && s->int_sample_fmt != AV_SAMPLE_FMT_FLTP
     278          84 :         && s->int_sample_fmt != AV_SAMPLE_FMT_DBLP
     279           0 :         && s->resample){
     280           0 :         av_log(s, AV_LOG_ERROR, "Resampling only supported with internal s16/s32/flt/dbl\n");
     281           0 :         ret = AVERROR(EINVAL);
     282           0 :         goto fail;
     283             :     }
     284             : 
     285             : #define RSC 1 //FIXME finetune
     286        1086 :     if(!s-> in.ch_count)
     287          22 :         s-> in.ch_count= av_get_channel_layout_nb_channels(s-> in_ch_layout);
     288        1086 :     if(!s->used_ch_count)
     289          22 :         s->used_ch_count= s->in.ch_count;
     290        1086 :     if(!s->out.ch_count)
     291          22 :         s->out.ch_count= av_get_channel_layout_nb_channels(s->out_ch_layout);
     292             : 
     293        1086 :     if(!s-> in.ch_count){
     294           0 :         av_assert0(!s->in_ch_layout);
     295           0 :         av_log(s, AV_LOG_ERROR, "Input channel count and layout are unset\n");
     296           0 :         ret = AVERROR(EINVAL);
     297           0 :         goto fail;
     298             :     }
     299             : 
     300        1086 :     av_get_channel_layout_string(l1, sizeof(l1), s-> in.ch_count, s-> in_ch_layout);
     301        1086 :     av_get_channel_layout_string(l2, sizeof(l2), s->out.ch_count, s->out_ch_layout);
     302        1086 :     if (s->out_ch_layout && s->out.ch_count != av_get_channel_layout_nb_channels(s->out_ch_layout)) {
     303           0 :         av_log(s, AV_LOG_ERROR, "Output channel layout %s mismatches specified channel count %d\n", l2, s->out.ch_count);
     304           0 :         ret = AVERROR(EINVAL);
     305           0 :         goto fail;
     306             :     }
     307        1086 :     if (s->in_ch_layout && s->used_ch_count != av_get_channel_layout_nb_channels(s->in_ch_layout)) {
     308           0 :         av_log(s, AV_LOG_ERROR, "Input channel layout %s mismatches specified channel count %d\n", l1, s->used_ch_count);
     309           0 :         ret = AVERROR(EINVAL);
     310           0 :         goto fail;
     311             :     }
     312             : 
     313        1086 :     if ((!s->out_ch_layout || !s->in_ch_layout) && s->used_ch_count != s->out.ch_count && !s->rematrix_custom) {
     314           0 :         av_log(s, AV_LOG_ERROR, "Rematrix is needed between %s and %s "
     315             :                "but there is not enough information to do it\n", l1, l2);
     316           0 :         ret = AVERROR(EINVAL);
     317           0 :         goto fail;
     318             :     }
     319             : 
     320        1086 : av_assert0(s->used_ch_count);
     321        1086 : av_assert0(s->out.ch_count);
     322        1086 :     s->resample_first= RSC*s->out.ch_count/s->in.ch_count - RSC < s->out_sample_rate/(float)s-> in_sample_rate - 1.0;
     323             : 
     324        1086 :     s->in_buffer= s->in;
     325        1086 :     s->silence  = s->in;
     326        1086 :     s->drop_temp= s->out;
     327             : 
     328        1086 :     if ((ret = swri_dither_init(s, s->out_sample_fmt, s->int_sample_fmt)) < 0)
     329           0 :         goto fail;
     330             : 
     331        1086 :     if(!s->resample && !s->rematrix && !s->channel_map && !s->dither.method){
     332         521 :         s->full_convert = swri_audio_convert_alloc(s->out_sample_fmt,
     333             :                                                    s-> in_sample_fmt, s-> in.ch_count, NULL, 0);
     334         521 :         return 0;
     335             :     }
     336             : 
     337         565 :     s->in_convert = swri_audio_convert_alloc(s->int_sample_fmt,
     338             :                                              s-> in_sample_fmt, s->used_ch_count, s->channel_map, 0);
     339         565 :     s->out_convert= swri_audio_convert_alloc(s->out_sample_fmt,
     340             :                                              s->int_sample_fmt, s->out.ch_count, NULL, 0);
     341             : 
     342         565 :     if (!s->in_convert || !s->out_convert) {
     343           0 :         ret = AVERROR(ENOMEM);
     344           0 :         goto fail;
     345             :     }
     346             : 
     347         565 :     s->postin= s->in;
     348         565 :     s->preout= s->out;
     349         565 :     s->midbuf= s->in;
     350             : 
     351         565 :     if(s->channel_map){
     352           4 :         s->postin.ch_count=
     353           4 :         s->midbuf.ch_count= s->used_ch_count;
     354           4 :         if(s->resample)
     355           0 :             s->in_buffer.ch_count= s->used_ch_count;
     356             :     }
     357         565 :     if(!s->resample_first){
     358         269 :         s->midbuf.ch_count= s->out.ch_count;
     359         269 :         if(s->resample)
     360         266 :             s->in_buffer.ch_count = s->out.ch_count;
     361             :     }
     362             : 
     363         565 :     set_audiodata_fmt(&s->postin, s->int_sample_fmt);
     364         565 :     set_audiodata_fmt(&s->midbuf, s->int_sample_fmt);
     365         565 :     set_audiodata_fmt(&s->preout, s->int_sample_fmt);
     366             : 
     367         565 :     if(s->resample){
     368         555 :         set_audiodata_fmt(&s->in_buffer, s->int_sample_fmt);
     369             :     }
     370             : 
     371         565 :     av_assert0(!s->preout.count);
     372         565 :     s->dither.noise = s->preout;
     373         565 :     s->dither.temp  = s->preout;
     374         565 :     if (s->dither.method > SWR_DITHER_NS) {
     375           0 :         s->dither.noise.bps = 4;
     376           0 :         s->dither.noise.fmt = AV_SAMPLE_FMT_FLTP;
     377           0 :         s->dither.noise_scale = 1;
     378             :     }
     379             : 
     380         565 :     if(s->rematrix || s->dither.method) {
     381          10 :         ret = swri_rematrix_init(s);
     382          10 :         if (ret < 0)
     383           0 :             goto fail;
     384             :     }
     385             : 
     386         565 :     return 0;
     387             : fail:
     388           0 :     swr_close(s);
     389           0 :     return ret;
     390             : 
     391             : }
     392             : 
     393       78725 : int swri_realloc_audio(AudioData *a, int count){
     394             :     int i, countb;
     395             :     AudioData old;
     396             : 
     397       78725 :     if(count < 0 || count > INT_MAX/2/a->bps/a->ch_count)
     398           0 :         return AVERROR(EINVAL);
     399             : 
     400       78725 :     if(a->count >= count)
     401       75362 :         return 0;
     402             : 
     403        3363 :     count*=2;
     404             : 
     405        3363 :     countb= FFALIGN(count*a->bps, ALIGN);
     406        3363 :     old= *a;
     407             : 
     408        3363 :     av_assert0(a->bps);
     409        3363 :     av_assert0(a->ch_count);
     410             : 
     411        3363 :     a->data= av_mallocz_array(countb, a->ch_count);
     412        3363 :     if(!a->data)
     413           0 :         return AVERROR(ENOMEM);
     414        6951 :     for(i=0; i<a->ch_count; i++){
     415        3588 :         a->ch[i]= a->data + i*(a->planar ? countb : a->bps);
     416        3588 :         if(a->count && a->planar) memcpy(a->ch[i], old.ch[i], a->count*a->bps);
     417             :     }
     418        3363 :     if(a->count && !a->planar) memcpy(a->ch[0], old.ch[0], a->count*a->ch_count*a->bps);
     419        3363 :     av_freep(&old.data);
     420        3363 :     a->count= count;
     421             : 
     422        3363 :     return 1;
     423             : }
     424             : 
     425       26806 : static void copy(AudioData *out, AudioData *in,
     426             :                  int count){
     427       26806 :     av_assert0(out->planar == in->planar);
     428       26806 :     av_assert0(out->bps == in->bps);
     429       26806 :     av_assert0(out->ch_count == in->ch_count);
     430       26806 :     if(out->planar){
     431             :         int ch;
     432       74996 :         for(ch=0; ch<out->ch_count; ch++)
     433       48190 :             memcpy(out->ch[ch], in->ch[ch], count*out->bps);
     434             :     }else
     435           0 :         memcpy(out->ch[0], in->ch[0], count*out->ch_count*out->bps);
     436       26806 : }
     437             : 
     438      490227 : static void fill_audiodata(AudioData *out, uint8_t *in_arg [SWR_CH_MAX]){
     439             :     int i;
     440      490227 :     if(!in_arg){
     441          53 :         memset(out->ch, 0, sizeof(out->ch));
     442      490174 :     }else if(out->planar){
     443      834406 :         for(i=0; i<out->ch_count; i++)
     444      520421 :             out->ch[i]= in_arg[i];
     445             :     }else{
     446      576330 :         for(i=0; i<out->ch_count; i++)
     447      400141 :             out->ch[i]= in_arg[0] + i*out->bps;
     448             :     }
     449      490227 : }
     450             : 
     451         135 : static void reversefill_audiodata(AudioData *out, uint8_t *in_arg [SWR_CH_MAX]){
     452             :     int i;
     453         135 :     if(out->planar){
     454         270 :         for(i=0; i<out->ch_count; i++)
     455         135 :             in_arg[i]= out->ch[i];
     456             :     }else{
     457           0 :         in_arg[0]= out->ch[0];
     458             :     }
     459         135 : }
     460             : 
     461             : /**
     462             :  *
     463             :  * out may be equal in.
     464             :  */
     465      401147 : static void buf_set(AudioData *out, AudioData *in, int count){
     466             :     int ch;
     467      401147 :     if(in->planar){
     468     1017199 :         for(ch=0; ch<out->ch_count; ch++)
     469      656145 :             out->ch[ch]= in->ch[ch] + count*out->bps;
     470             :     }else{
     471      128991 :         for(ch=out->ch_count-1; ch>=0; ch--)
     472       88898 :             out->ch[ch]= in->ch[0] + (ch + count*out->ch_count) * out->bps;
     473             :     }
     474      401147 : }
     475             : 
     476             : /**
     477             :  *
     478             :  * @return number of samples output per channel
     479             :  */
     480       14948 : static int resample(SwrContext *s, AudioData *out_param, int out_count,
     481             :                              const AudioData * in_param, int in_count){
     482             :     AudioData in, out, tmp;
     483       14948 :     int ret_sum=0;
     484       14948 :     int border=0;
     485       14948 :     int padless = ARCH_X86 && s->engine == SWR_ENGINE_SWR ? 7 : 0;
     486             : 
     487             :     av_assert1(s->in_buffer.ch_count == in_param->ch_count);
     488             :     av_assert1(s->in_buffer.planar   == in_param->planar);
     489             :     av_assert1(s->in_buffer.fmt      == in_param->fmt);
     490             : 
     491       14948 :     tmp=out=*out_param;
     492       14948 :     in =  *in_param;
     493             : 
     494       14948 :     border = s->resampler->invert_initial_buffer(s->resample, &s->in_buffer,
     495             :                  &in, in_count, &s->in_buffer_index, &s->in_buffer_count);
     496       14948 :     if (border == INT_MAX) {
     497          74 :         return 0;
     498       14874 :     } else if (border < 0) {
     499           0 :         return border;
     500       14874 :     } else if (border) {
     501         553 :         buf_set(&in, &in, border);
     502         553 :         in_count -= border;
     503         553 :         s->resample_in_constraint = 0;
     504             :     }
     505             : 
     506       26773 :     do{
     507             :         int ret, size, consumed;
     508       41647 :         if(!s->resample_in_constraint && s->in_buffer_count){
     509       37873 :             buf_set(&tmp, &s->in_buffer, s->in_buffer_index);
     510       37873 :             ret= s->resampler->multiple_resample(s->resample, &out, out_count, &tmp, s->in_buffer_count, &consumed);
     511       37873 :             out_count -= ret;
     512       37873 :             ret_sum += ret;
     513       37873 :             buf_set(&out, &out, ret);
     514       37873 :             s->in_buffer_count -= consumed;
     515       37873 :             s->in_buffer_index += consumed;
     516             : 
     517       37873 :             if(!in_count)
     518       29744 :                 break;
     519       23003 :             if(s->in_buffer_count <= border){
     520       13483 :                 buf_set(&in, &in, -s->in_buffer_count);
     521       13483 :                 in_count += s->in_buffer_count;
     522       13483 :                 s->in_buffer_count=0;
     523       13483 :                 s->in_buffer_index=0;
     524       13483 :                 border = 0;
     525             :             }
     526             :         }
     527             : 
     528       26777 :         if((s->flushed || in_count > padless) && !s->in_buffer_count){
     529       13499 :             s->in_buffer_index=0;
     530       13499 :             ret= s->resampler->multiple_resample(s->resample, &out, out_count, &in, FFMAX(in_count-padless, 0), &consumed);
     531       13499 :             out_count -= ret;
     532       13499 :             ret_sum += ret;
     533       13499 :             buf_set(&out, &out, ret);
     534       13499 :             in_count -= consumed;
     535       13499 :             buf_set(&in, &in, consumed);
     536             :         }
     537             : 
     538             :         //TODO is this check sane considering the advanced copy avoidance below
     539       26777 :         size= s->in_buffer_index + s->in_buffer_count + in_count;
     540       26777 :         if(   size > s->in_buffer.count
     541         583 :            && s->in_buffer_count + in_count <= s->in_buffer_index){
     542           0 :             buf_set(&tmp, &s->in_buffer, s->in_buffer_index);
     543           0 :             copy(&s->in_buffer, &tmp, s->in_buffer_count);
     544           0 :             s->in_buffer_index=0;
     545             :         }else
     546       26777 :             if((ret=swri_realloc_audio(&s->in_buffer, size)) < 0)
     547           0 :                 return ret;
     548             : 
     549       26777 :         if(in_count){
     550       26773 :             int count= in_count;
     551       26773 :             if(s->in_buffer_count && s->in_buffer_count+2 < count && out_count) count= s->in_buffer_count+2;
     552             : 
     553       26773 :             buf_set(&tmp, &s->in_buffer, s->in_buffer_index + s->in_buffer_count);
     554       26773 :             copy(&tmp, &in, /*in_*/count);
     555       26773 :             s->in_buffer_count += count;
     556       26773 :             in_count -= count;
     557       26773 :             border += count;
     558       26773 :             buf_set(&in, &in, count);
     559       26773 :             s->resample_in_constraint= 0;
     560       26773 :             if(s->in_buffer_count != count || in_count)
     561       40051 :                 continue;
     562       13495 :             if (padless) {
     563       13495 :                 padless = 0;
     564       13495 :                 continue;
     565             :             }
     566             :         }
     567           4 :         break;
     568             :     }while(1);
     569             : 
     570       14874 :     s->resample_in_constraint= !!out_count;
     571             : 
     572       14874 :     return ret_sum;
     573             : }
     574             : 
     575      245613 : static int swr_convert_internal(struct SwrContext *s, AudioData *out, int out_count,
     576             :                                                       AudioData *in , int  in_count){
     577             :     AudioData *postin, *midbuf, *preout;
     578             :     int ret/*, in_max*/;
     579             :     AudioData preout_tmp, midbuf_tmp;
     580             : 
     581      245613 :     if(s->full_convert){
     582      228743 :         av_assert0(!s->resample);
     583      228743 :         swri_audio_convert(s->full_convert, out, in, in_count);
     584      228743 :         return out_count;
     585             :     }
     586             : 
     587             : //     in_max= out_count*(int64_t)s->in_sample_rate / s->out_sample_rate + resample_filter_taps;
     588             : //     in_count= FFMIN(in_count, in_in + 2 - s->hist_buffer_count);
     589             : 
     590       16870 :     if((ret=swri_realloc_audio(&s->postin, in_count))<0)
     591           0 :         return ret;
     592       16870 :     if(s->resample_first){
     593       13901 :         av_assert0(s->midbuf.ch_count == s->used_ch_count);
     594       13901 :         if((ret=swri_realloc_audio(&s->midbuf, out_count))<0)
     595           0 :             return ret;
     596             :     }else{
     597        2969 :         av_assert0(s->midbuf.ch_count ==  s->out.ch_count);
     598        2969 :         if((ret=swri_realloc_audio(&s->midbuf,  in_count))<0)
     599           0 :             return ret;
     600             :     }
     601       16870 :     if((ret=swri_realloc_audio(&s->preout, out_count))<0)
     602           0 :         return ret;
     603             : 
     604       16870 :     postin= &s->postin;
     605             : 
     606       16870 :     midbuf_tmp= s->midbuf;
     607       16870 :     midbuf= &midbuf_tmp;
     608       16870 :     preout_tmp= s->preout;
     609       16870 :     preout= &preout_tmp;
     610             : 
     611       16870 :     if(s->int_sample_fmt == s-> in_sample_fmt && s->in.planar && !s->channel_map)
     612       11564 :         postin= in;
     613             : 
     614       16870 :     if(s->resample_first ? !s->resample : !s->rematrix)
     615        4396 :         midbuf= postin;
     616             : 
     617       16870 :     if(s->resample_first ? !s->rematrix : !s->resample)
     618       13543 :         preout= midbuf;
     619             : 
     620       16870 :     if(s->int_sample_fmt == s->out_sample_fmt && s->out.planar
     621       10504 :        && !(s->out_sample_fmt==AV_SAMPLE_FMT_S32P && (s->dither.output_sample_bits&31))){
     622       10504 :         if(preout==in){
     623           0 :             out_count= FFMIN(out_count, in_count); //TODO check at the end if this is needed or redundant
     624           0 :             av_assert0(s->in.planar); //we only support planar internally so it has to be, we support copying non planar though
     625           0 :             copy(out, in, out_count);
     626           0 :             return out_count;
     627             :         }
     628       10504 :         else if(preout==postin) preout= midbuf= postin= out;
     629       10504 :         else if(preout==midbuf) preout= midbuf= out;
     630         502 :         else                    preout= out;
     631             :     }
     632             : 
     633       16870 :     if(in != postin){
     634        5306 :         swri_audio_convert(s->in_convert, postin, in, in_count);
     635             :     }
     636             : 
     637       16870 :     if(s->resample_first){
     638       13901 :         if(postin != midbuf)
     639       12214 :             out_count= resample(s, midbuf, out_count, postin, in_count);
     640       13901 :         if(midbuf != preout)
     641         593 :             swri_rematrix(s, preout, midbuf, out_count, preout==out);
     642             :     }else{
     643        2969 :         if(postin != midbuf)
     644         260 :             swri_rematrix(s, midbuf, postin, in_count, midbuf==out);
     645        2969 :         if(midbuf != preout)
     646        2734 :             out_count= resample(s, preout, out_count, midbuf, in_count);
     647             :     }
     648             : 
     649       16870 :     if(preout != out && out_count){
     650        5952 :         AudioData *conv_src = preout;
     651        5952 :         if(s->dither.method){
     652             :             int ch;
     653           0 :             int dither_count= FFMAX(out_count, 1<<16);
     654             : 
     655           0 :             if (preout == in) {
     656           0 :                 conv_src = &s->dither.temp;
     657           0 :                 if((ret=swri_realloc_audio(&s->dither.temp, dither_count))<0)
     658           0 :                     return ret;
     659             :             }
     660             : 
     661           0 :             if((ret=swri_realloc_audio(&s->dither.noise, dither_count))<0)
     662           0 :                 return ret;
     663           0 :             if(ret)
     664           0 :                 for(ch=0; ch<s->dither.noise.ch_count; ch++)
     665           0 :                     if((ret=swri_get_dither(s, s->dither.noise.ch[ch], s->dither.noise.count, (12345678913579ULL*ch + 3141592) % 2718281828U, s->dither.noise.fmt))<0)
     666           0 :                         return ret;
     667           0 :             av_assert0(s->dither.noise.ch_count == preout->ch_count);
     668             : 
     669           0 :             if(s->dither.noise_pos + out_count > s->dither.noise.count)
     670           0 :                 s->dither.noise_pos = 0;
     671             : 
     672           0 :             if (s->dither.method < SWR_DITHER_NS){
     673           0 :                 if (s->mix_2_1_simd) {
     674           0 :                     int len1= out_count&~15;
     675           0 :                     int off = len1 * preout->bps;
     676             : 
     677           0 :                     if(len1)
     678           0 :                         for(ch=0; ch<preout->ch_count; ch++)
     679           0 :                             s->mix_2_1_simd(conv_src->ch[ch], preout->ch[ch], s->dither.noise.ch[ch] + s->dither.noise.bps * s->dither.noise_pos, s->native_simd_one, 0, 0, len1);
     680           0 :                     if(out_count != len1)
     681           0 :                         for(ch=0; ch<preout->ch_count; ch++)
     682           0 :                             s->mix_2_1_f(conv_src->ch[ch] + off, preout->ch[ch] + off, s->dither.noise.ch[ch] + s->dither.noise.bps * s->dither.noise_pos + off + len1, s->native_one, 0, 0, out_count - len1);
     683             :                 } else {
     684           0 :                     for(ch=0; ch<preout->ch_count; ch++)
     685           0 :                         s->mix_2_1_f(conv_src->ch[ch], preout->ch[ch], s->dither.noise.ch[ch] + s->dither.noise.bps * s->dither.noise_pos, s->native_one, 0, 0, out_count);
     686             :                 }
     687             :             } else {
     688           0 :                 switch(s->int_sample_fmt) {
     689           0 :                 case AV_SAMPLE_FMT_S16P :swri_noise_shaping_int16(s, conv_src, preout, &s->dither.noise, out_count); break;
     690           0 :                 case AV_SAMPLE_FMT_S32P :swri_noise_shaping_int32(s, conv_src, preout, &s->dither.noise, out_count); break;
     691           0 :                 case AV_SAMPLE_FMT_FLTP :swri_noise_shaping_float(s, conv_src, preout, &s->dither.noise, out_count); break;
     692           0 :                 case AV_SAMPLE_FMT_DBLP :swri_noise_shaping_double(s,conv_src, preout, &s->dither.noise, out_count); break;
     693             :                 }
     694             :             }
     695           0 :             s->dither.noise_pos += out_count;
     696             :         }
     697             : //FIXME packed doesn't need more than 1 chan here!
     698        5952 :         swri_audio_convert(s->out_convert, out, conv_src, out_count);
     699             :     }
     700       16870 :     return out_count;
     701             : }
     702             : 
     703      281837 : int swr_is_initialized(struct SwrContext *s) {
     704      281837 :     return !!s->in_buffer.ch_count;
     705             : }
     706             : 
     707      246180 : int attribute_align_arg swr_convert(struct SwrContext *s, uint8_t *out_arg[SWR_CH_MAX], int out_count,
     708             :                                                     const uint8_t *in_arg [SWR_CH_MAX], int  in_count){
     709      246180 :     AudioData * in= &s->in;
     710      246180 :     AudioData *out= &s->out;
     711             :     int av_unused max_output;
     712             : 
     713      246180 :     if (!swr_is_initialized(s)) {
     714           0 :         av_log(s, AV_LOG_ERROR, "Context has not been initialized\n");
     715           0 :         return AVERROR(EINVAL);
     716             :     }
     717             : #if defined(ASSERT_LEVEL) && ASSERT_LEVEL >1
     718             :     max_output = swr_get_out_samples(s, in_count);
     719             : #endif
     720             : 
     721      492412 :     while(s->drop_output > 0){
     722             :         int ret;
     723             :         uint8_t *tmp_arg[SWR_CH_MAX];
     724             : #define MAX_DROP_STEP 16384
     725         104 :         if((ret=swri_realloc_audio(&s->drop_temp, FFMIN(s->drop_output, MAX_DROP_STEP)))<0)
     726          52 :             return ret;
     727             : 
     728         104 :         reversefill_audiodata(&s->drop_temp, tmp_arg);
     729         104 :         s->drop_output *= -1; //FIXME find a less hackish solution
     730         104 :         ret = swr_convert(s, tmp_arg, FFMIN(-s->drop_output, MAX_DROP_STEP), in_arg, in_count); //FIXME optimize but this is as good as never called so maybe it doesn't matter
     731         104 :         s->drop_output *= -1;
     732         104 :         in_count = 0;
     733         104 :         if(ret>0) {
     734          52 :             s->drop_output -= ret;
     735          52 :             if (!s->drop_output && !out_arg)
     736           0 :                 return 0;
     737          52 :             continue;
     738             :         }
     739             : 
     740          52 :         av_assert0(s->drop_output);
     741          52 :         return 0;
     742             :     }
     743             : 
     744      246128 :     if(!in_arg){
     745        1547 :         if(s->resample){
     746        1065 :             if (!s->flushed)
     747         543 :                 s->resampler->flush(s);
     748        1065 :             s->resample_in_constraint = 0;
     749        1065 :             s->flushed = 1;
     750         482 :         }else if(!s->in_buffer_count){
     751         482 :             return 0;
     752             :         }
     753             :     }else
     754      244581 :         fill_audiodata(in ,  (void*)in_arg);
     755             : 
     756      245646 :     fill_audiodata(out, out_arg);
     757             : 
     758      245646 :     if(s->resample){
     759       14948 :         int ret = swr_convert_internal(s, out, out_count, in, in_count);
     760       14948 :         if(ret>0 && !s->drop_output)
     761       14284 :             s->outpts += ret * (int64_t)s->in_sample_rate;
     762             : 
     763             :         av_assert2(max_output < 0 || ret < 0 || ret <= max_output);
     764             : 
     765       14948 :         return ret;
     766             :     }else{
     767      230698 :         AudioData tmp= *in;
     768      230698 :         int ret2=0;
     769             :         int ret, size;
     770      230698 :         size = FFMIN(out_count, s->in_buffer_count);
     771      230698 :         if(size){
     772         123 :             buf_set(&tmp, &s->in_buffer, s->in_buffer_index);
     773         123 :             ret= swr_convert_internal(s, out, size, &tmp, size);
     774         123 :             if(ret<0)
     775           0 :                 return ret;
     776         123 :             ret2= ret;
     777         123 :             s->in_buffer_count -= ret;
     778         123 :             s->in_buffer_index += ret;
     779         123 :             buf_set(out, out, ret);
     780         123 :             out_count -= ret;
     781         123 :             if(!s->in_buffer_count)
     782           2 :                 s->in_buffer_index = 0;
     783             :         }
     784             : 
     785      230698 :         if(in_count){
     786      230575 :             size= s->in_buffer_index + s->in_buffer_count + in_count - out_count;
     787             : 
     788      230575 :             if(in_count > out_count) { //FIXME move after swr_convert_internal
     789          33 :                 if(   size > s->in_buffer.count
     790           4 :                 && s->in_buffer_count + in_count - out_count <= s->in_buffer_index){
     791           0 :                     buf_set(&tmp, &s->in_buffer, s->in_buffer_index);
     792           0 :                     copy(&s->in_buffer, &tmp, s->in_buffer_count);
     793           0 :                     s->in_buffer_index=0;
     794             :                 }else
     795          33 :                     if((ret=swri_realloc_audio(&s->in_buffer, size)) < 0)
     796           0 :                         return ret;
     797             :             }
     798             : 
     799      230575 :             if(out_count){
     800      230542 :                 size = FFMIN(in_count, out_count);
     801      230542 :                 ret= swr_convert_internal(s, out, size, in, size);
     802      230542 :                 if(ret<0)
     803           0 :                     return ret;
     804      230542 :                 buf_set(in, in, ret);
     805      230542 :                 in_count -= ret;
     806      230542 :                 ret2 += ret;
     807             :             }
     808      230575 :             if(in_count){
     809          33 :                 buf_set(&tmp, &s->in_buffer, s->in_buffer_index + s->in_buffer_count);
     810          33 :                 copy(&tmp, in, in_count);
     811          33 :                 s->in_buffer_count += in_count;
     812             :             }
     813             :         }
     814      230698 :         if(ret2>0 && !s->drop_output)
     815      230665 :             s->outpts += ret2 * (int64_t)s->in_sample_rate;
     816             :         av_assert2(max_output < 0 || ret2 < 0 || ret2 <= max_output);
     817      230698 :         return ret2;
     818             :     }
     819             : }
     820             : 
     821          52 : int swr_drop_output(struct SwrContext *s, int count){
     822             :     const uint8_t *tmp_arg[SWR_CH_MAX];
     823          52 :     s->drop_output += count;
     824             : 
     825          52 :     if(s->drop_output <= 0)
     826           0 :         return 0;
     827             : 
     828          52 :     av_log(s, AV_LOG_VERBOSE, "discarding %d audio samples\n", count);
     829          52 :     return swr_convert(s, NULL, s->drop_output, tmp_arg, 0);
     830             : }
     831             : 
     832          31 : int swr_inject_silence(struct SwrContext *s, int count){
     833             :     int ret, i;
     834             :     uint8_t *tmp_arg[SWR_CH_MAX];
     835             : 
     836          31 :     if(count <= 0)
     837           0 :         return 0;
     838             : 
     839             : #define MAX_SILENCE_STEP 16384
     840          91 :     while (count > MAX_SILENCE_STEP) {
     841          29 :         if ((ret = swr_inject_silence(s, MAX_SILENCE_STEP)) < 0)
     842           0 :             return ret;
     843          29 :         count -= MAX_SILENCE_STEP;
     844             :     }
     845             : 
     846          31 :     if((ret=swri_realloc_audio(&s->silence, count))<0)
     847           0 :         return ret;
     848             : 
     849          62 :     if(s->silence.planar) for(i=0; i<s->silence.ch_count; i++) {
     850          31 :         memset(s->silence.ch[i], s->silence.bps==1 ? 0x80 : 0, count*s->silence.bps);
     851             :     } else
     852           0 :         memset(s->silence.ch[0], s->silence.bps==1 ? 0x80 : 0, count*s->silence.bps*s->silence.ch_count);
     853             : 
     854          31 :     reversefill_audiodata(&s->silence, tmp_arg);
     855          31 :     av_log(s, AV_LOG_VERBOSE, "adding %d audio samples of silence\n", count);
     856          31 :     ret = swr_convert(s, NULL, 0, (const uint8_t**)tmp_arg, count);
     857          31 :     return ret;
     858             : }
     859             : 
     860      465730 : int64_t swr_get_delay(struct SwrContext *s, int64_t base){
     861      465730 :     if (s->resampler && s->resample){
     862        8592 :         return s->resampler->get_delay(s, base);
     863             :     }else{
     864      457138 :         return (s->in_buffer_count*base + (s->in_sample_rate>>1))/ s->in_sample_rate;
     865             :     }
     866             : }
     867             : 
     868           0 : int swr_get_out_samples(struct SwrContext *s, int in_samples)
     869             : {
     870             :     int64_t out_samples;
     871             : 
     872           0 :     if (in_samples < 0)
     873           0 :         return AVERROR(EINVAL);
     874             : 
     875           0 :     if (s->resampler && s->resample) {
     876           0 :         if (!s->resampler->get_out_samples)
     877           0 :             return AVERROR(ENOSYS);
     878           0 :         out_samples = s->resampler->get_out_samples(s, in_samples);
     879             :     } else {
     880           0 :         out_samples = s->in_buffer_count + in_samples;
     881           0 :         av_assert0(s->out_sample_rate == s->in_sample_rate);
     882             :     }
     883             : 
     884           0 :     if (out_samples > INT_MAX)
     885           0 :         return AVERROR(EINVAL);
     886             : 
     887           0 :     return out_samples;
     888             : }
     889             : 
     890         122 : int swr_set_compensation(struct SwrContext *s, int sample_delta, int compensation_distance){
     891             :     int ret;
     892             : 
     893         122 :     if (!s || compensation_distance < 0)
     894           0 :         return AVERROR(EINVAL);
     895         122 :     if (!compensation_distance && sample_delta)
     896           0 :         return AVERROR(EINVAL);
     897         122 :     if (!s->resample) {
     898           0 :         s->flags |= SWR_FLAG_RESAMPLE;
     899           0 :         ret = swr_init(s);
     900           0 :         if (ret < 0)
     901           0 :             return ret;
     902             :     }
     903         122 :     if (!s->resampler->set_compensation){
     904           0 :         return AVERROR(EINVAL);
     905             :     }else{
     906         122 :         return s->resampler->set_compensation(s->resample, sample_delta, compensation_distance);
     907             :     }
     908             : }
     909             : 
     910      234923 : int64_t swr_next_pts(struct SwrContext *s, int64_t pts){
     911      234923 :     if(pts == INT64_MIN)
     912        2804 :         return s->outpts;
     913             : 
     914      232119 :     if (s->firstpts == AV_NOPTS_VALUE)
     915         990 :         s->outpts = s->firstpts = pts;
     916             : 
     917      232119 :     if(s->min_compensation >= FLT_MAX) {
     918      230904 :         return (s->outpts = pts - swr_get_delay(s, s->in_sample_rate * (int64_t)s->out_sample_rate));
     919             :     } else {
     920        1215 :         int64_t delta = pts - swr_get_delay(s, s->in_sample_rate * (int64_t)s->out_sample_rate) - s->outpts + s->drop_output*(int64_t)s->in_sample_rate;
     921        1215 :         double fdelta = delta /(double)(s->in_sample_rate * (int64_t)s->out_sample_rate);
     922             : 
     923        1215 :         if(fabs(fdelta) > s->min_compensation) {
     924         230 :             if(s->outpts == s->firstpts || fabs(fdelta) > s->min_hard_compensation){
     925             :                 int ret;
     926          54 :                 if(delta > 0) ret = swr_inject_silence(s,  delta / s->out_sample_rate);
     927          52 :                 else          ret = swr_drop_output   (s, -delta / s-> in_sample_rate);
     928          54 :                 if(ret<0){
     929           0 :                     av_log(s, AV_LOG_ERROR, "Failed to compensate for timestamp delta of %f\n", fdelta);
     930             :                 }
     931         122 :             } else if(s->soft_compensation_duration && s->max_soft_compensation) {
     932         122 :                 int duration = s->out_sample_rate * s->soft_compensation_duration;
     933         122 :                 double max_soft_compensation = s->max_soft_compensation / (s->max_soft_compensation < 0 ? -s->in_sample_rate : 1);
     934         122 :                 int comp = av_clipf(fdelta, -max_soft_compensation, max_soft_compensation) * duration ;
     935         122 :                 av_log(s, AV_LOG_VERBOSE, "compensating audio timestamp drift:%f compensation:%d in:%d\n", fdelta, comp, duration);
     936         122 :                 swr_set_compensation(s, comp, duration);
     937             :             }
     938             :         }
     939             : 
     940        1215 :         return s->outpts;
     941             :     }
     942             : }

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