mirror of https://git.ffmpeg.org/ffmpeg.git
avfilter/af_anlmdn: add smooth factor option
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@ -1801,6 +1801,9 @@ Pass only noise.
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Default value is @var{o}.
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Default value is @var{o}.
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@end table
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@end table
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@item m
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Set smooth factor. Default value is @var{11}. Allowed range is from @var{1} to @var{15}.
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@end table
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@end table
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@section anull
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@section anull
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@ -29,7 +29,6 @@
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#include "af_anlmdndsp.h"
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#include "af_anlmdndsp.h"
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#define MAX_DIFF 11.f
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#define WEIGHT_LUT_NBITS 20
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#define WEIGHT_LUT_NBITS 20
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#define WEIGHT_LUT_SIZE (1<<WEIGHT_LUT_NBITS)
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#define WEIGHT_LUT_SIZE (1<<WEIGHT_LUT_NBITS)
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@ -41,6 +40,7 @@ typedef struct AudioNLMeansContext {
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float a;
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float a;
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int64_t pd;
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int64_t pd;
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int64_t rd;
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int64_t rd;
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float m;
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int om;
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int om;
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float pdiff_lut_scale;
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float pdiff_lut_scale;
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@ -81,6 +81,7 @@ static const AVOption anlmdn_options[] = {
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{ "i", "input", 0, AV_OPT_TYPE_CONST, {.i64=IN_MODE}, 0, 0, AF, "mode" },
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{ "i", "input", 0, AV_OPT_TYPE_CONST, {.i64=IN_MODE}, 0, 0, AF, "mode" },
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{ "o", "output", 0, AV_OPT_TYPE_CONST, {.i64=OUT_MODE}, 0, 0, AF, "mode" },
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{ "o", "output", 0, AV_OPT_TYPE_CONST, {.i64=OUT_MODE}, 0, 0, AF, "mode" },
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{ "n", "noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_MODE},0, 0, AF, "mode" },
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{ "n", "noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_MODE},0, 0, AF, "mode" },
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{ "m", "set smooth factor", OFFSET(m), AV_OPT_TYPE_FLOAT, {.dbl=11.}, 1, 15, AF },
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{ NULL }
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{ NULL }
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};
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};
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@ -178,7 +179,7 @@ static int config_output(AVFilterLink *outlink)
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if (ret < 0)
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if (ret < 0)
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return ret;
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return ret;
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s->pdiff_lut_scale = 1.f / MAX_DIFF * WEIGHT_LUT_SIZE;
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s->pdiff_lut_scale = 1.f / s->m * WEIGHT_LUT_SIZE;
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for (int i = 0; i < WEIGHT_LUT_SIZE; i++) {
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for (int i = 0; i < WEIGHT_LUT_SIZE; i++) {
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float w = -i / s->pdiff_lut_scale;
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float w = -i / s->pdiff_lut_scale;
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@ -201,6 +202,7 @@ static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
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float *cache = (float *)s->cache->extended_data[ch];
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float *cache = (float *)s->cache->extended_data[ch];
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const float sw = (65536.f / (4 * K + 2)) / sqrtf(s->a);
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const float sw = (65536.f / (4 * K + 2)) / sqrtf(s->a);
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float *dst = (float *)out->extended_data[ch] + s->offset;
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float *dst = (float *)out->extended_data[ch] + s->offset;
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const float smooth = s->m;
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for (int i = S; i < s->H + S; i++) {
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for (int i = S; i < s->H + S; i++) {
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float P = 0.f, Q = 0.f;
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float P = 0.f, Q = 0.f;
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@ -224,7 +226,7 @@ static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
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av_assert2(distance >= 0.f);
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av_assert2(distance >= 0.f);
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w = distance * sw;
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w = distance * sw;
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if (w >= MAX_DIFF)
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if (w >= smooth)
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continue;
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continue;
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weight_lut_idx = w * s->pdiff_lut_scale;
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weight_lut_idx = w * s->pdiff_lut_scale;
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av_assert2(weight_lut_idx < WEIGHT_LUT_SIZE);
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av_assert2(weight_lut_idx < WEIGHT_LUT_SIZE);
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