[FFmpeg-cvslog] avfilter/af_acrossover: add option to adjust input gain
Paul B Mahol
git at videolan.org
Sat Nov 28 17:03:54 EET 2020
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sat Nov 28 15:54:10 2020 +0100| [66d89a8070e4f3dd730c5b461403c6a071266e8a] | committer: Paul B Mahol
avfilter/af_acrossover: add option to adjust input gain
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=66d89a8070e4f3dd730c5b461403c6a071266e8a
---
doc/filters.texi | 3 +++
libavfilter/af_acrossover.c | 27 ++++++++++++++++++++-------
2 files changed, 23 insertions(+), 7 deletions(-)
diff --git a/doc/filters.texi b/doc/filters.texi
index b3a1bd3277..2f64d568a6 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -539,6 +539,9 @@ Set filter order. Available values are:
@end table
Default is @var{4th}.
+
+ at item level
+Set input gain level. Allowed range is from 0 to 1. Default value is 1.
@end table
@subsection Examples
diff --git a/libavfilter/af_acrossover.c b/libavfilter/af_acrossover.c
index 33a0812c9f..ae6173f088 100644
--- a/libavfilter/af_acrossover.c
+++ b/libavfilter/af_acrossover.c
@@ -27,6 +27,7 @@
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/eval.h"
+#include "libavutil/float_dsp.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
@@ -55,6 +56,7 @@ typedef struct AudioCrossoverContext {
char *splits_str;
int order_opt;
+ float level_in;
int order;
int filter_count;
@@ -69,6 +71,8 @@ typedef struct AudioCrossoverContext {
AVFrame *frames[MAX_BANDS];
int (*filter_channels)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
+
+ AVFloatDSPContext *fdsp;
} AudioCrossoverContext;
#define OFFSET(x) offsetof(AudioCrossoverContext, x)
@@ -87,6 +91,7 @@ static const AVOption acrossover_options[] = {
{ "16th", "16th order", 0, AV_OPT_TYPE_CONST, {.i64=7}, 0, 0, AF, "m" },
{ "18th", "18th order", 0, AV_OPT_TYPE_CONST, {.i64=8}, 0, 0, AF, "m" },
{ "20th", "20th order", 0, AV_OPT_TYPE_CONST, {.i64=9}, 0, 0, AF, "m" },
+ { "level", "set input gain", OFFSET(level_in), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, AF },
{ NULL }
};
@@ -98,6 +103,10 @@ static av_cold int init(AVFilterContext *ctx)
char *p, *arg, *saveptr = NULL;
int i, ret = 0;
+ s->fdsp = avpriv_float_dsp_alloc(0);
+ if (!s->fdsp)
+ return AVERROR(ENOMEM);
+
s->splits = av_calloc(MAX_SPLITS, sizeof(*s->splits));
if (!s->splits)
return AVERROR(ENOMEM);
@@ -288,7 +297,7 @@ static void biquad_process_## name(BiquadContext *b, \
BIQUAD_PROCESS(fltp, float)
BIQUAD_PROCESS(dblp, double)
-#define XOVER_PROCESS(name, type, one) \
+#define XOVER_PROCESS(name, type, one, ff) \
static int filter_channels_## name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
{ \
AudioCrossoverContext *s = ctx->priv; \
@@ -299,23 +308,26 @@ static int filter_channels_## name(AVFilterContext *ctx, void *arg, int jobnr, i
const int nb_samples = in->nb_samples; \
\
for (int ch = start; ch < end; ch++) { \
+ const type *src = (const type *)in->extended_data[ch]; \
CrossoverChannel *xover = &s->xover[ch]; \
\
+ s->fdsp->vector_## ff ##mul_scalar((type *)frames[0]->extended_data[ch], src, \
+ s->level_in, nb_samples); \
+ emms_c(); \
+ \
for (int band = 0; band < ctx->nb_outputs; band++) { \
for (int f = 0; band + 1 < ctx->nb_outputs && f < s->filter_count; f++) { \
- const type *src = (const type *)in->extended_data[ch]; \
const type *prv = (const type *)frames[band]->extended_data[ch]; \
type *dst = (type *)frames[band + 1]->extended_data[ch]; \
- const type *hsrc = (band == 0 && f == 0) ? src : f == 0 ? prv : dst; \
+ const type *hsrc = f == 0 ? prv : dst; \
BiquadContext *hp = &xover->hp[band][f]; \
\
biquad_process_## name(hp, dst, hsrc, nb_samples); \
} \
\
for (int f = 0; band + 1 < ctx->nb_outputs && f < s->filter_count; f++) { \
- const type *src = (const type *)in->extended_data[ch]; \
type *dst = (type *)frames[band]->extended_data[ch]; \
- const type *lsrc = (band == 0 && f == 0) ? src : dst; \
+ const type *lsrc = dst; \
BiquadContext *lp = &xover->lp[band][f]; \
\
biquad_process_## name(lp, dst, lsrc, nb_samples); \
@@ -353,8 +365,8 @@ static int filter_channels_## name(AVFilterContext *ctx, void *arg, int jobnr, i
return 0; \
}
-XOVER_PROCESS(fltp, float, 1.f)
-XOVER_PROCESS(dblp, double, 1.0)
+XOVER_PROCESS(fltp, float, 1.f, f)
+XOVER_PROCESS(dblp, double, 1.0, d)
static int config_input(AVFilterLink *inlink)
{
@@ -453,6 +465,7 @@ static av_cold void uninit(AVFilterContext *ctx)
AudioCrossoverContext *s = ctx->priv;
int i;
+ av_freep(&s->fdsp);
av_freep(&s->splits);
av_freep(&s->xover);
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