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channelmix: add option to filter FC

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Add an option to do a lowpass filter on the FC channel to isolate
the voices better and move the higher frequencies to the stereo
channels.

See #861
This commit is contained in:
Wim Taymans 2022-03-01 11:30:12 +01:00
parent 5b3388e4ac
commit 23db50630d
7 changed files with 26 additions and 4 deletions
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17
spa/plugins/audioconvert/channelmix.c
View file

@ -510,6 +510,15 @@ static int impl_node_enum_params(void *object, int seq,
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 13:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, id,
SPA_PROP_INFO_name, SPA_POD_String("channelmix.fc-cutoff"),
SPA_PROP_INFO_description, SPA_POD_String("FC cutoff frequency (Hz)"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(
this->mix.fc_cutoff, 0.0, 48000.0),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 14:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, id,
SPA_PROP_INFO_name, SPA_POD_String("channelmix.rear-delay"),
@ -518,7 +527,7 @@ static int impl_node_enum_params(void *object, int seq,
this->mix.rear_delay, 0.0, 1000.0),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 14:
case 15:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, id,
SPA_PROP_INFO_name, SPA_POD_String("channelmix.stereo-widen"),
@ -527,7 +536,7 @@ static int impl_node_enum_params(void *object, int seq,
this->mix.widen, 0.0, 1.0),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 15:
case 16:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, id,
SPA_PROP_INFO_name, SPA_POD_String("channelmix.hilbert-taps"),
@ -587,6 +596,8 @@ static int impl_node_enum_params(void *object, int seq,
CHANNELMIX_OPTION_UPMIX));
spa_pod_builder_string(&b, "channelmix.lfe-cutoff");
spa_pod_builder_float(&b, this->mix.lfe_cutoff);
spa_pod_builder_string(&b, "channelmix.fc-cutoff");
spa_pod_builder_float(&b, this->mix.fc_cutoff);
spa_pod_builder_string(&b, "channelmix.rear-delay");
spa_pod_builder_float(&b, this->mix.rear_delay);
spa_pod_builder_string(&b, "channelmix.stereo-widen");
@ -628,6 +639,8 @@ static int channelmix_set_param(struct impl *this, const char *k, const char *s)
SPA_FLAG_UPDATE(this->mix.options, CHANNELMIX_OPTION_UPMIX, spa_atob(s));
else if (spa_streq(k, "channelmix.lfe-cutoff"))
spa_atof(s, &this->mix.lfe_cutoff);
else if (spa_streq(k, "channelmix.fc-cutoff"))
spa_atof(s, &this->mix.fc_cutoff);
else if (spa_streq(k, "channelmix.rear-delay"))
spa_atof(s, &this->mix.rear_delay);
else if (spa_streq(k, "channelmix.stereo-widen"))