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avfilter/af_anlmdn: rework how denoising strength is used 

Make into account patch size.
This commit is contained in:
Paul B Mahol 2019-01-12 15:33:39 +01:00
parent ad0d5d7516
commit f4fd8ef725
2 changed files with 3 additions and 3 deletions
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2
doc/filters.texi
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@ -1762,7 +1762,7 @@ The filter accepts the following options.
@table @option
@item s
Set denoising strength. Allowed range is from 1 to 9999. Default value is 1.
Set denoising strength. Allowed range is from 0.00001 to 10. Default value is 0.00001.
@item p
Set patch radius duration. Allowed range is from 1 to 100 milliseconds.

4
libavfilter/af_anlmdn.c
View File

@ -66,7 +66,7 @@ typedef struct AudioNLMeansContext {
#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption anlmdn_options[] = {
{ "s", "set denoising strength", OFFSET(a), AV_OPT_TYPE_FLOAT, {.dbl=1}, 1, 9999, AF },
{ "s", "set denoising strength", OFFSET(a), AV_OPT_TYPE_FLOAT, {.dbl=0.00001},0.00001, 10, AF },
{ "p", "set patch duration", OFFSET(pd), AV_OPT_TYPE_DURATION, {.i64=2000}, 1000, 100000, AF },
{ "r", "set research duration", OFFSET(rd), AV_OPT_TYPE_DURATION, {.i64=6000}, 2000, 300000, AF },
{ NULL }
@ -186,7 +186,7 @@ static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
const int K = s->K;
const float *f = (const float *)(s->in->extended_data[ch]) + K;
float *cache = (float *)s->cache->extended_data[ch];
const float sw = 32768.f / s->a;
const float sw = (65536.f / (4 * K + 2)) / sqrtf(s->a);
float *dst = (float *)out->extended_data[ch] + s->offset;
for (int i = S; i < s->H + S; i++) {