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channelmix: Implement PSD upmixing for stereo -> quad

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Fixes #2436.
This commit is contained in:
Ole Salscheider 2022-06-11 20:19:23 +02:00 • committed by Wim Taymans
parent 354a04c91d
commit 5dc4434dc7
1 changed files with 20 additions and 4 deletions
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24
spa/plugins/audioconvert/channelmix-ops-c.c
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@ -177,6 +177,7 @@ void
channelmix_f32_2_4_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
const void * SPA_RESTRICT src[], uint32_t n_samples)
{
uint32_t i, n_dst = mix->dst_chan;
float **d = (float **)dst;
const float **s = (const float **)src;
const float v0 = mix->matrix[0][0];
@ -184,10 +185,25 @@ channelmix_f32_2_4_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
const float v2 = mix->matrix[2][0];
const float v3 = mix->matrix[3][1];
vol_c(d[0], s[0], v0, n_samples);
vol_c(d[1], s[1], v1, n_samples);
vol_c(d[2], s[0], v2, n_samples);
vol_c(d[3], s[1], v3, n_samples);
if (SPA_FLAG_IS_SET(mix->flags, CHANNELMIX_FLAG_ZERO)) {
for (i = 0; i < n_dst; i++)
clear_c(d[i], n_samples);
}
else {
vol_c(d[0], s[0], v0, n_samples);
vol_c(d[1], s[1], v1, n_samples);
if (mix->upmix != CHANNELMIX_UPMIX_PSD) {
vol_c(d[2], s[0], v2, n_samples);
vol_c(d[3], s[1], v3, n_samples);
} else {
sub_c(d[2], s[0], s[1], n_samples);
delay_convolve_run(mix->buffer[1], &mix->pos[1], BUFFER_SIZE, mix->delay,
mix->taps, mix->n_taps, d[3], d[2], -v3, n_samples);
delay_convolve_run(mix->buffer[0], &mix->pos[0], BUFFER_SIZE, mix->delay,
mix->taps, mix->n_taps, d[2], d[2], v2, n_samples);
}
}
}
#define MASK_3_1 _M(FL)|_M(FR)|_M(FC)|_M(LFE)