[FFmpeg-cvslog] avfilter/af_biquads: make commands work reliably within biquad filter
Paul B Mahol
git at videolan.org
Mon Nov 2 14:31:34 EET 2020
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Mon Nov 2 13:24:32 2020 +0100| [2ddd6afd30601f04becb3deab67467caebfad1a9] | committer: Paul B Mahol
avfilter/af_biquads: make commands work reliably within biquad filter
Previously changing single coefficient would give unexpected results.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2ddd6afd30601f04becb3deab67467caebfad1a9
---
libavfilter/af_biquads.c | 21 +++++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)
diff --git a/libavfilter/af_biquads.c b/libavfilter/af_biquads.c
index 230266434d..6a81908ff3 100644
--- a/libavfilter/af_biquads.c
+++ b/libavfilter/af_biquads.c
@@ -127,6 +127,9 @@ typedef struct BiquadsContext {
double a0, a1, a2;
double b0, b1, b2;
+ double oa0, oa1, oa2;
+ double ob0, ob1, ob2;
+
ChanCache *cache;
int block_align;
@@ -480,6 +483,12 @@ static int config_filter(AVFilterLink *outlink, int reset)
switch (s->filter_type) {
case biquad:
+ s->a0 = s->oa0;
+ s->a1 = s->oa1;
+ s->a2 = s->oa2;
+ s->b0 = s->ob0;
+ s->b1 = s->ob1;
+ s->b2 = s->ob2;
break;
case equalizer:
s->a0 = 1 + alpha / A;
@@ -1154,12 +1163,12 @@ DEFINE_BIQUAD_FILTER(highshelf, "Apply a high shelf filter.");
#endif /* CONFIG_HIGHSHELF_FILTER */
#if CONFIG_BIQUAD_FILTER
static const AVOption biquad_options[] = {
- {"a0", NULL, OFFSET(a0), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT32_MIN, INT32_MAX, FLAGS},
- {"a1", NULL, OFFSET(a1), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
- {"a2", NULL, OFFSET(a2), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
- {"b0", NULL, OFFSET(b0), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
- {"b1", NULL, OFFSET(b1), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
- {"b2", NULL, OFFSET(b2), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
+ {"a0", NULL, OFFSET(oa0), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT32_MIN, INT32_MAX, FLAGS},
+ {"a1", NULL, OFFSET(oa1), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
+ {"a2", NULL, OFFSET(oa2), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
+ {"b0", NULL, OFFSET(ob0), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
+ {"b1", NULL, OFFSET(ob1), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
+ {"b2", NULL, OFFSET(ob2), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
{"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
{"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
{"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
More information about the ffmpeg-cvslog
mailing list