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Vapor: work-around stem export alignment 

This is a somewhat fragile solution to ensure that
processor reset happens in the same cycle in which
the actual data arrives at the start of the cycle.
This commit is contained in:
Robin Gareus 2024-03-07 00:56:20 +01:00
parent 77e7470270
commit 42dc033636
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
2 changed files with 9 additions and 15 deletions
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10
libs/ardour/surround_return.cc
View File

@ -398,6 +398,13 @@ SurroundReturn::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_
}
if (_sync_and_align) {
if (!_rolling && start_sample != end_sample) {
samplecnt_t latency_preroll = _session.remaining_latency_preroll ();
if (nframes + playback_offset () <= latency_preroll) {
end_sample = start_sample;
speed = 0;
}
}
if (!_rolling && start_sample != end_sample) {
_delaybuffers.flush ();
_surround_processor->deactivate();
@ -420,6 +427,8 @@ SurroundReturn::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_
bool with_bed = _with_bed;
samplecnt_t latency = effective_latency ();
bufs.set_count (_configured_output);
_surround_bufs.silence (nframes, 0);
@ -438,7 +447,6 @@ SurroundReturn::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_
}
timepos_t unused_start, unused_end;
samplecnt_t latency = effective_latency ();
for (uint32_t s = 0; s < ss->bufs ().count ().n_audio (); ++s, ++cid) {

14
share/scripts/_adm_render.lua
View File

@ -6,23 +6,9 @@ ardour {
}
function factory () return function ()
-- ignore input systemic latency, no additional pre-roll
-- to fill buffers with input.
for r in Session:get_tracks():iter() do
r:input():disconnect_all (nil)
end
-- make surround-return announce additional latency to the next 512
-- cycle boundary (and delay the output accordingly).
Session:surround_master():surround_return():set_sync_and_align (true)
-- Mixbus: enforce latency pre-roll to be >= 1505 (latency of Atmos renderer)
-- this allows the Stem Export the Surround Bus.
-- (Mixbus tracks are aligned to master-out, not surrround out)
if Session:master_out().ch_post then
Session:master_out():ch_post ():to_latent():set_user_latency (1505)
end
end end
function icon (params) return function (ctx, width, height, fg)