swr: Remember previously set int_sample_format from user

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit d4325b2f)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libswresample/options.c

@@ -49,8 +49,8 @@ static const AVOption options[]={
 {"in_sample_fmt"        , "set input sample format"     , OFFSET( in_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , INT_MAX, PARAM},
 {"osf"                  , "set output sample format"    , OFFSET(out_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , INT_MAX, PARAM},
 {"out_sample_fmt"       , "set output sample format"    , OFFSET(out_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , INT_MAX, PARAM},
-{"tsf"                  , "set internal sample format"  , OFFSET(int_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , INT_MAX, PARAM},
-{"internal_sample_fmt"  , "set internal sample format"  , OFFSET(int_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , INT_MAX, PARAM},
+{"tsf"                  , "set internal sample format"  , OFFSET(user_int_sample_fmt), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , INT_MAX, PARAM},
+{"internal_sample_fmt"  , "set internal sample format"  , OFFSET(user_int_sample_fmt), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , INT_MAX, PARAM},
 {"icl"                  , "set input channel layout"    , OFFSET(user_in_ch_layout ), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=0           }, 0    , INT64_MAX , PARAM, "channel_layout"},
 {"in_channel_layout"    , "set input channel layout"    , OFFSET(user_in_ch_layout ), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=0           }, 0    , INT64_MAX , PARAM, "channel_layout"},
 {"ocl"                  , "set output channel layout"   , OFFSET(user_out_ch_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=0           }, 0    , INT64_MAX , PARAM, "channel_layout"},

libswresample/swresample.c

@@ -173,6 +173,8 @@ av_cold int swr_init(struct SwrContext *s){
     s-> in_ch_layout = s-> user_in_ch_layout;
     s->out_ch_layout = s->user_out_ch_layout;
 
+    s->int_sample_fmt= s->user_int_sample_fmt;
+
     if(av_get_channel_layout_nb_channels(s-> in_ch_layout) > SWR_CH_MAX) {
         av_log(s, AV_LOG_WARNING, "Input channel layout 0x%"PRIx64" is invalid or unsupported.\n", s-> in_ch_layout);
         s->in_ch_layout = 0;

libswresample/swresample_internal.h

@@ -95,6 +95,7 @@ struct SwrContext {
     int user_used_ch_count;                         ///< User set used channel count
     int64_t user_in_ch_layout;                      ///< User set input channel layout
     int64_t user_out_ch_layout;                     ///< User set output channel layout
+    enum AVSampleFormat user_int_sample_fmt;        ///< User set internal sample format
 
     struct DitherContext dither;