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avfilter/af_anlmdn: add output mode option

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This commit is contained in:
Paul B Mahol 2019-03-01 16:38:59 +01:00
parent 85051febc6
commit 007c13e51e
2 changed files with 35 additions and 1 deletions
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17
doc/filters.texi
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@ -1773,6 +1773,23 @@ Default value is 2 milliseconds.
@item r
Set research radius duration. Allowed range is from 2 to 300 milliseconds.
Default value is 6 milliseconds.
@item o
Set the output mode.
It accepts the following values:
@table @option
@item i
Pass input unchanged.
@item o
Pass noise filtered out.
@item n
Pass only noise.
Default value is @var{o}.
@end table
@end table
@section anull

19
libavfilter/af_anlmdn.c
View File

@ -41,6 +41,7 @@ typedef struct AudioNLMeansContext {
float a;
int64_t pd;
int64_t rd;
int om;
float pdiff_lut_scale;
float weight_lut[WEIGHT_LUT_SIZE];
@ -62,6 +63,13 @@ typedef struct AudioNLMeansContext {
AudioNLMDNDSPContext dsp;
} AudioNLMeansContext;
enum OutModes {
IN_MODE,
OUT_MODE,
NOISE_MODE,
NB_MODES
};
#define OFFSET(x) offsetof(AudioNLMeansContext, x)
#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
@ -69,6 +77,10 @@ static const AVOption anlmdn_options[] = {
{ "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 },
{ "o", "set output mode", OFFSET(om), AV_OPT_TYPE_INT, {.i64=OUT_MODE}, 0, NB_MODES-1, AF, "mode" },
{ "i", "input", 0, AV_OPT_TYPE_CONST, {.i64=IN_MODE}, 0, 0, AF, "mode" },
{ "o", "output", 0, AV_OPT_TYPE_CONST, {.i64=OUT_MODE}, 0, 0, AF, "mode" },
{ "n", "noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_MODE},0, 0, AF, "mode" },
{ NULL }
};
@ -184,6 +196,7 @@ static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
AVFrame *out = arg;
const int S = s->S;
const int K = s->K;
const int om = s->om;
const float *f = (const float *)(s->in->extended_data[ch]) + K;
float *cache = (float *)s->cache->extended_data[ch];
const float sw = (65536.f / (4 * K + 2)) / sqrtf(s->a);
@ -223,7 +236,11 @@ static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
P += f[i];
Q += 1;
dst[i - S] = P / Q;
switch (om) {
case IN_MODE: dst[i - S] = f[i]; break;
case OUT_MODE: dst[i - S] = P / Q; break;
case NOISE_MODE: dst[i - S] = f[i] - (P / Q); break;
}
}
return 0;