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avfilter/af_aiir: implement mix option

This commit is contained in:
Paul B Mahol 2019-07-08 16:44:53 +02:00
parent 034a9d2507
commit 2a801e8856
2 changed files with 10 additions and 0 deletions
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4
doc/filters.texi
View File

@ -1409,6 +1409,10 @@ single-precision floating-point
16-bit integers
@end table
@item mix
How much to use filtered signal in output. Default is 1.
Range is between 0 and 1.
@item response
Show IR frequency response, magnitude and phase in additional video stream.
By default it is disabled.

6
libavfilter/af_aiir.c
View File

@ -57,6 +57,7 @@ typedef struct AudioIIRContext {
const AVClass *class;
char *a_str, *b_str, *g_str;
double dry_gain, wet_gain;
double mix;
int format;
int process;
int precision;
@ -124,6 +125,7 @@ static int iir_ch_## name(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
AudioIIRContext *s = ctx->priv; \
const double ig = s->dry_gain; \
const double og = s->wet_gain; \
const double mix = s->mix; \
ThreadData *td = arg; \
AVFrame *in = td->in, *out = td->out; \
const type *src = (const type *)in->extended_data[ch]; \
@ -152,6 +154,7 @@ static int iir_ch_## name(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
\
oc[0] = sample; \
sample *= og; \
sample = sample * mix + ic[0] * (1. - mix); \
if (need_clipping && sample < min) { \
(*clippings)++; \
dst[n] = min; \
@ -177,6 +180,7 @@ static int iir_ch_serial_## name(AVFilterContext *ctx, void *arg, int ch, int nb
AudioIIRContext *s = ctx->priv; \
const double ig = s->dry_gain; \
const double og = s->wet_gain; \
const double mix = s->mix; \
ThreadData *td = arg; \
AVFrame *in = td->in, *out = td->out; \
const type *src = (const type *)in->extended_data[ch]; \
@ -207,6 +211,7 @@ static int iir_ch_serial_## name(AVFilterContext *ctx, void *arg, int ch, int nb
o1 = o0; \
o0 *= og; \
\
o0 = o0 * mix + (1. - mix) * sample; \
if (need_clipping && o0 < min) { \
(*clippings)++; \
dst[n] = min; \
@ -1074,6 +1079,7 @@ static const AVOption aiir_options[] = {
{ "flt", "single-precision floating-point", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "precision" },
{ "i32", "32-bit integers", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "precision" },
{ "i16", "16-bit integers", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "precision" },
{ "mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF },
{ "response", "show IR frequency response", OFFSET(response), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF },
{ "channel", "set IR channel to display frequency response", OFFSET(ir_channel), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, VF },
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "hd720"}, 0, 0, VF },