avfilter/af_biquads: add shortcut to set internal precision

2 files changed, 240 insertions, 2 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index 99fcae2650..3a31f72d79 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1719,6 +1719,21 @@ Set transform type of IIR filter.
 @item tdii
 @item latt
 @end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
+@end table
 @end table
 
 @subsection Commands
@@ -2918,6 +2933,21 @@ Set transform type of IIR filter.
 @item tdii
 @item latt
 @end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
+@end table
 @end table
 
 @subsection Commands
@@ -2990,6 +3020,21 @@ Set transform type of IIR filter.
 @item tdii
 @item latt
 @end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
+@end table
 @end table
 
 @subsection Commands
@@ -3069,6 +3114,21 @@ Set transform type of IIR filter.
 @item tdii
 @item latt
 @end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
+@end table
 @end table
 
 @subsection Commands
@@ -3136,6 +3196,21 @@ Set transform type of IIR filter.
 @item tdii
 @item latt
 @end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
+@end table
 @end table
 
 @section bs2b
@@ -3868,6 +3943,21 @@ Set transform type of IIR filter.
 @item tdii
 @item latt
 @end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
+@end table
 @end table
 
 @subsection Examples
@@ -4354,6 +4444,21 @@ Set transform type of IIR filter.
 @item tdii
 @item latt
 @end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
+@end table
 @end table
 
 @subsection Commands
@@ -4689,6 +4794,21 @@ Set transform type of IIR filter.
 @item tdii
 @item latt
 @end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
+@end table
 @end table
 
 @subsection Examples
@@ -5895,6 +6015,21 @@ Set transform type of IIR filter.
 @item tdii
 @item latt
 @end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
+@end table
 @end table
 
 @subsection Commands
diff --git a/libavfilter/af_biquads.c b/libavfilter/af_biquads.c
index 3ec26d2a9d..edefe15d05 100644
--- a/libavfilter/af_biquads.c
+++ b/libavfilter/af_biquads.c
@@ -115,6 +115,7 @@ typedef struct BiquadsContext {
     int poles;
     int csg;
     int transform_type;
+    int precision;
 
     int bypass;
 
@@ -143,15 +144,20 @@ typedef struct BiquadsContext {
 
 static int query_formats(AVFilterContext *ctx)
 {
+    BiquadsContext *s = ctx->priv;
     AVFilterFormats *formats;
     AVFilterChannelLayouts *layouts;
-    static const enum AVSampleFormat sample_fmts[] = {
+    static const enum AVSampleFormat auto_sample_fmts[] = {
         AV_SAMPLE_FMT_S16P,
         AV_SAMPLE_FMT_S32P,
         AV_SAMPLE_FMT_FLTP,
         AV_SAMPLE_FMT_DBLP,
         AV_SAMPLE_FMT_NONE
     };
+    enum AVSampleFormat sample_fmts[] = {
+        AV_SAMPLE_FMT_S16P,
+        AV_SAMPLE_FMT_NONE
+    };
     int ret;
 
     layouts = ff_all_channel_counts();
@@ -161,7 +167,27 @@ static int query_formats(AVFilterContext *ctx)
     if (ret < 0)
         return ret;
 
-    formats = ff_make_format_list(sample_fmts);
+    switch (s->precision) {
+    case 0:
+        sample_fmts[0] = AV_SAMPLE_FMT_S16P;
+        formats = ff_make_format_list(sample_fmts);
+        break;
+    case 1:
+        sample_fmts[0] = AV_SAMPLE_FMT_S32P;
+        formats = ff_make_format_list(sample_fmts);
+        break;
+    case 2:
+        sample_fmts[0] = AV_SAMPLE_FMT_FLTP;
+        formats = ff_make_format_list(sample_fmts);
+        break;
+    case 3:
+        sample_fmts[0] = AV_SAMPLE_FMT_DBLP;
+        formats = ff_make_format_list(sample_fmts);
+        break;
+    default:
+        formats = ff_make_format_list(auto_sample_fmts);
+        break;
+    }
     if (!formats)
         return AVERROR(ENOMEM);
     ret = ff_set_common_formats(ctx, formats);
@@ -861,6 +887,13 @@ static const AVOption equalizer_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -893,6 +926,13 @@ static const AVOption bass_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -925,6 +965,13 @@ static const AVOption treble_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -956,6 +1003,13 @@ static const AVOption bandpass_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -986,6 +1040,13 @@ static const AVOption bandreject_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -1018,6 +1079,13 @@ static const AVOption lowpass_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -1050,6 +1118,13 @@ static const AVOption highpass_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -1082,6 +1157,13 @@ static const AVOption allpass_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -1114,6 +1196,13 @@ static const AVOption lowshelf_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -1146,6 +1235,13 @@ static const AVOption highshelf_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };
 
@@ -1171,6 +1267,13 @@ static const AVOption biquad_options[] = {
     {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
     {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
     {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
+    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
+    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
+    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, "precision"},
+    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, "precision"},
+    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, "precision"},
+    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, "precision"},
     {NULL}
 };