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channelmix: do LFE upmix when lfe_cutoff is set

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Require only the lfe_cutoff be set when generating LFE.
This way you can only generate LFE without having to enable upmix
for all other channels.
This commit is contained in:
Wim Taymans 2022-01-11 12:44:36 +01:00
parent 0ad318f61c
commit c9efae4334
1 changed files with 13 additions and 9 deletions
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22
spa/plugins/audioconvert/channelmix-ops.c
View file

@ -155,11 +155,10 @@ static int make_matrix(struct channelmix *mix)
float slev = SQRT1_2;
float llev = 0.5f;
float maxsum = 0.0f;
bool do_upmix = SPA_FLAG_IS_SET(mix->options, CHANNELMIX_OPTION_UPMIX);
#define _MATRIX(s,d) matrix[_CH(s)][_CH(d)]
spa_log_debug(mix->log, "src-mask:%08"PRIx64" dst-mask:%08"PRIx64,
src_mask, dst_mask);
spa_log_debug(mix->log, "src-mask:%08"PRIx64" dst-mask:%08"PRIx64
" options:%08x", src_mask, dst_mask, mix->options);
/* move the MONO mask to FRONT so that the lower bits can be shifted
* away. */
@ -374,12 +373,17 @@ static int make_matrix(struct channelmix *mix)
}
}
if (!do_upmix)
goto done;
unassigned = dst_mask & ~src_mask;
spa_log_debug(mix->log, "unassigned upmix %08" PRIx64, unassigned);
spa_log_debug(mix->log, "unassigned upmix %08"PRIx64" lfe:%f",
unassigned, mix->lfe_cutoff);
if (mix->lfe_cutoff == 0.0f)
unassigned &= ~_MASK(LFE);
if (!SPA_FLAG_IS_SET(mix->options, CHANNELMIX_OPTION_UPMIX))
unassigned &= _MASK(LFE);
spa_log_debug(mix->log, "final unassigned upmix %08" PRIx64, unassigned);
if (unassigned & FRONT) {
if ((src_mask & STEREO) == STEREO) {
@ -390,7 +394,7 @@ static int make_matrix(struct channelmix *mix)
spa_log_warn(mix->log, "can't produce FC");
}
}
if (unassigned & _MASK(LFE) && mix->lfe_cutoff > 0.0f) {
if (unassigned & _MASK(LFE)) {
if ((src_mask & STEREO) == STEREO) {
spa_log_debug(mix->log, "produce LFE from STEREO");
_MATRIX(LFE,FL) += llev;
@ -445,7 +449,7 @@ done:
sum += fabs(matrix[i][j]);
}
maxsum = SPA_MAX(maxsum, sum);
if (i == _CH(LFE) && do_upmix && mix->lfe_cutoff > 0.0f) {
if (i == _CH(LFE) && mix->lfe_cutoff > 0.0f) {
spa_log_debug(mix->log, "channel %d is LFE", ic);
lr4_set(&mix->lr4[ic], BQ_LOWPASS, mix->lfe_cutoff / mix->freq);
mix->lr4_info[ic] = 1;