swresample/options: enable linear_interp and exact_rational by default

better quality without speedloss
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>

doc/resampler.texi

@@ -132,12 +132,13 @@ For swr only, set resampling phase shift, default value is 10, and must be in
 the interval [0,30].
 
 @item linear_interp
-Use linear interpolation if set to 1, default value is 0.
+Use linear interpolation when enabled (the default). Disable it if you want
+to preserve speed instead of quality when exact_rational fails.
 
 @item exact_rational
 For swr only, when enabled, try to use exact phase_count based on input and
 output sample rate. However, if it is larger than @code{1 << phase_shift},
-the phase_count will be @code{1 << phase_shift} as fallback. Default is disabled.
+the phase_count will be @code{1 << phase_shift} as fallback. Default is enabled.
 
 @item cutoff
 Set cutoff frequency (swr: 6dB point; soxr: 0dB point) ratio; must be a float

libswresample/options.c

@@ -84,8 +84,8 @@ static const AVOption options[]={
 
 {"filter_size"          , "set swr resampling filter size", OFFSET(filter_size)  , AV_OPT_TYPE_INT  , {.i64=32                    }, 0      , INT_MAX   , PARAM },
 {"phase_shift"          , "set swr resampling phase shift", OFFSET(phase_shift)  , AV_OPT_TYPE_INT  , {.i64=10                    }, 0      , 24        , PARAM },
-{"linear_interp"        , "enable linear interpolation" , OFFSET(linear_interp)  , AV_OPT_TYPE_BOOL , {.i64=0                     }, 0      , 1         , PARAM },
-{"exact_rational"       , "enable exact rational"       , OFFSET(exact_rational) , AV_OPT_TYPE_BOOL , {.i64=0                     }, 0      , 1         , PARAM },
+{"linear_interp"        , "enable linear interpolation" , OFFSET(linear_interp)  , AV_OPT_TYPE_BOOL , {.i64=1                     }, 0      , 1         , PARAM },
+{"exact_rational"       , "enable exact rational"       , OFFSET(exact_rational) , AV_OPT_TYPE_BOOL , {.i64=1                     }, 0      , 1         , PARAM },
 {"cutoff"               , "set cutoff frequency ratio"  , OFFSET(cutoff)         , AV_OPT_TYPE_DOUBLE,{.dbl=0.                    }, 0      , 1         , PARAM },
 
 /* duplicate option in order to work with avconv */

tests/ref/acodec/s302m

-a69563c4c5db97d1b313c2fd7a193dd4 *tests/data/fate/acodec-s302m.mpegts
+165d022ab86306d069797acff0c1e295 *tests/data/fate/acodec-s302m.mpegts
 1589164 tests/data/fate/acodec-s302m.mpegts
-2c033ed1d9029ed03e08c1d01dcefd99 *tests/data/fate/acodec-s302m.out.wav
-stddev:  986.98 PSNR: 36.44 MAXDIFF:18642 bytes:  1058400/  1056708
+31f25a0020fd9017de9c3c608316854b *tests/data/fate/acodec-s302m.out.wav
+stddev:  986.94 PSNR: 36.44 MAXDIFF:18571 bytes:  1058400/  1056708

tests/ref/lavf/dv_fmt

-3bcb02ee889b8b2da19cae79d0f1c27d *./tests/data/lavf/lavf.dv
+5a622e1ae4fd16bec59cd514380d7882 *./tests/data/lavf/lavf.dv
 3600000 ./tests/data/lavf/lavf.dv
-./tests/data/lavf/lavf.dv CRC=0x5a36cc70
-f827583ae54e590d753c37709738fd54 *./tests/data/lavf/lavf.dv
+./tests/data/lavf/lavf.dv CRC=0x0a6edbd8
+155e8fd4ea1196edd56ae9ff09edcf85 *./tests/data/lavf/lavf.dv
 3480000 ./tests/data/lavf/lavf.dv
-./tests/data/lavf/lavf.dv CRC=0x8f8074be
+./tests/data/lavf/lavf.dv CRC=0x3e5583fa
 87d3b20f656235671383a7eaa2f66330 *./tests/data/lavf/lavf.dv
 3600000 ./tests/data/lavf/lavf.dv
 ./tests/data/lavf/lavf.dv CRC=0xf3e6873c

tests/ref/lavf/gxf

-1b384e20293a84b274739c147e2b290a *./tests/data/lavf/lavf.gxf
+6ef34e8bedf699cd1601022c4a0a4910 *./tests/data/lavf/lavf.gxf
 795876 ./tests/data/lavf/lavf.gxf
-./tests/data/lavf/lavf.gxf CRC=0x55b3ec1d
-411f109b5867e5cb81bc876d3cc5702b *./tests/data/lavf/lavf.gxf
+./tests/data/lavf/lavf.gxf CRC=0x1dbfef76
+7780c428dde2c93a9ff04794f7168440 *./tests/data/lavf/lavf.gxf
 794656 ./tests/data/lavf/lavf.gxf
-./tests/data/lavf/lavf.gxf CRC=0x0d7e90ea
+./tests/data/lavf/lavf.gxf CRC=0xdcd39443
 0638c4d073ac224608baaba16732b68f *./tests/data/lavf/lavf.gxf
 795876 ./tests/data/lavf/lavf.gxf
 ./tests/data/lavf/lavf.gxf CRC=0x5ade0285

tests/ref/lavf/mxf

-2fd59c174dfb213d35e86dea63c0fb13 *./tests/data/lavf/lavf.mxf
+eaac3125ac1a61fe5f968c7af83fa71e *./tests/data/lavf/lavf.mxf
 525369 ./tests/data/lavf/lavf.mxf
-./tests/data/lavf/lavf.mxf CRC=0x9fd3f752
-edb3b610c301362d7b4c12f06f8d2782 *./tests/data/lavf/lavf.mxf
+./tests/data/lavf/lavf.mxf CRC=0x8dddfaab
+1562530330b13e9e70f522fe20265632 *./tests/data/lavf/lavf.mxf
 560697 ./tests/data/lavf/lavf.mxf
-./tests/data/lavf/lavf.mxf CRC=0xc51717ef
-a6ba421f38ee5ec46e181225c632fee4 *./tests/data/lavf/lavf.mxf
+./tests/data/lavf/lavf.mxf CRC=0xf21b1b48
+e07858715997313ae66a1cdd6fde5f66 *./tests/data/lavf/lavf.mxf
 525369 ./tests/data/lavf/lavf.mxf
-./tests/data/lavf/lavf.mxf CRC=0x9fd3f752
+./tests/data/lavf/lavf.mxf CRC=0x8dddfaab