lswr/swresample: use AV_OPT_TYPE_SAMPLE_FMT for sample format options

Improve usability and robustness.

doc/ffmpeg-resampler.texi

@@ -52,19 +52,13 @@ Set the input sample rate. Default value is 0.
 Set the output sample rate. Default value is 0.
 
 @item isf, in_sample_fmt
-Specify the input sample format. Must be an integer representing the
-corresponding sample format specified in
-@file{libavutil/samplefmt.h} header. Default value is -1
-(corresponding to @code{AV_SAMPLE_FMT_NONE}).
+Specify the input sample format. It is set by default to @code{none}.
 
 @item osf, out_sample_fmt
-Specify the output sample format. Must be an integer representing the
-corresponding sample format specified in
-@file{libavutil/samplefmt.h} header. Default value is -1
-(corresponding to @code{AV_SAMPLE_FMT_NONE}).
+Specify the output sample format. It is set by default to @code{none}.
 
 @item tsf, internal_sample_fmt
-Set the internal sample format. Default value is -1.
+Set the internal sample format. Default value is @code{none}.
 
 @item icl, in_channel_layout
 Set the input channel layout.

libswresample/swresample.c

@@ -51,12 +51,12 @@ static const AVOption options[]={
 {"in_sample_rate"       , "set input sample rate"       , OFFSET( in_sample_rate), AV_OPT_TYPE_INT  , {.i64=0                     }, 0      , INT_MAX   , PARAM},
 {"osr"                  , "set output sample rate"      , OFFSET(out_sample_rate), AV_OPT_TYPE_INT  , {.i64=0                     }, 0      , INT_MAX   , PARAM},
 {"out_sample_rate"      , "set output sample rate"      , OFFSET(out_sample_rate), AV_OPT_TYPE_INT  , {.i64=0                     }, 0      , INT_MAX   , PARAM},
-{"isf"                  , "set input sample format"     , OFFSET( in_sample_fmt ), AV_OPT_TYPE_INT  , {.i64=AV_SAMPLE_FMT_NONE    }, -1     , AV_SAMPLE_FMT_NB-1+256, PARAM},
-{"in_sample_fmt"        , "set input sample format"     , OFFSET( in_sample_fmt ), AV_OPT_TYPE_INT  , {.i64=AV_SAMPLE_FMT_NONE    }, -1     , AV_SAMPLE_FMT_NB-1+256, PARAM},
-{"osf"                  , "set output sample format"    , OFFSET(out_sample_fmt ), AV_OPT_TYPE_INT  , {.i64=AV_SAMPLE_FMT_NONE    }, -1     , AV_SAMPLE_FMT_NB-1+256, PARAM},
-{"out_sample_fmt"       , "set output sample format"    , OFFSET(out_sample_fmt ), AV_OPT_TYPE_INT  , {.i64=AV_SAMPLE_FMT_NONE    }, -1     , AV_SAMPLE_FMT_NB-1+256, PARAM},
-{"tsf"                  , "set internal sample format"  , OFFSET(int_sample_fmt ), AV_OPT_TYPE_INT  , {.i64=AV_SAMPLE_FMT_NONE    }, -1     , AV_SAMPLE_FMT_FLTP, PARAM},
-{"internal_sample_fmt"  , "set internal sample format"  , OFFSET(int_sample_fmt ), AV_OPT_TYPE_INT  , {.i64=AV_SAMPLE_FMT_NONE    }, -1     , AV_SAMPLE_FMT_FLTP, PARAM},
+{"isf"                  , "set input sample format"     , OFFSET( in_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , AV_SAMPLE_FMT_NB-1, PARAM},
+{"in_sample_fmt"        , "set input sample format"     , OFFSET( in_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , AV_SAMPLE_FMT_NB-1, PARAM},
+{"osf"                  , "set output sample format"    , OFFSET(out_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , AV_SAMPLE_FMT_NB-1, PARAM},
+{"out_sample_fmt"       , "set output sample format"    , OFFSET(out_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , AV_SAMPLE_FMT_NB-1, PARAM},
+{"tsf"                  , "set internal sample format"  , OFFSET(int_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , AV_SAMPLE_FMT_NB-1, PARAM},
+{"internal_sample_fmt"  , "set internal sample format"  , OFFSET(int_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1   , AV_SAMPLE_FMT_NB-1, PARAM},
 {"icl"                  , "set input channel layout"    , OFFSET( in_ch_layout  ), AV_OPT_TYPE_INT64, {.i64=0                     }, 0      , INT64_MAX , PARAM, "channel_layout"},
 {"in_channel_layout"    , "set input channel layout"    , OFFSET( in_ch_layout  ), AV_OPT_TYPE_INT64, {.i64=0                     }, 0      , INT64_MAX , PARAM, "channel_layout"},
 {"ocl"                  , "set output channel layout"   , OFFSET(out_ch_layout  ), AV_OPT_TYPE_INT64, {.i64=0                     }, 0      , INT64_MAX , PARAM, "channel_layout"},

libswresample/swresample.h

@@ -47,8 +47,8 @@
  * av_opt_set_int(swr, "out_channel_layout", AV_CH_LAYOUT_STEREO,  0);
  * av_opt_set_int(swr, "in_sample_rate",     48000,                0);
  * av_opt_set_int(swr, "out_sample_rate",    44100,                0);
- * av_opt_set_int(swr, "in_sample_fmt",      AV_SAMPLE_FMT_FLTP,   0);
- * av_opt_set_int(swr, "out_sample_fmt,      AV_SAMPLE_FMT_S16,    0);
+ * av_opt_set_sample_fmt(swr, "in_sample_fmt", AV_SAMPLE_FMT_FLTP, 0);
+ * av_opt_set_sample_fmt(swr, "out_sample_fmt, AV_SAMPLE_FMT_S16,  0);
  * @endcode
  *
  * Once all values have been set, it must be initialized with swr_init(). If

libswresample/version.h

@@ -30,7 +30,7 @@
 
 #define LIBSWRESAMPLE_VERSION_MAJOR 0
 #define LIBSWRESAMPLE_VERSION_MINOR 17
-#define LIBSWRESAMPLE_VERSION_MICRO 101
+#define LIBSWRESAMPLE_VERSION_MICRO 102
 
 #define LIBSWRESAMPLE_VERSION_INT  AV_VERSION_INT(LIBSWRESAMPLE_VERSION_MAJOR, \
                                                   LIBSWRESAMPLE_VERSION_MINOR, \