Ξ-W2-T1: the resample bake chain — instrument renders, extension banks, one click re-points and resets
This commit is contained in:
@@ -0,0 +1,192 @@
|
||||
// Standalone tests for reasampler::instrument::bake::bake_render — no VST3, no REAPER, no
|
||||
// framework. Same fast assert loop as the sibling pure tests.
|
||||
//
|
||||
// Covers: Gate termination WITH a sustain loop active (the render must end at the window,
|
||||
// and the tail must be silent because the gate actually released — not merely because the
|
||||
// buffer ran out); Trigger termination on its own play span; channel-count preservation
|
||||
// with no stereo fold; byte-identical repeats; and the refusals (unplayable sample, empty
|
||||
// window).
|
||||
|
||||
#include "../src/core/instrument/bake/bake_render.h"
|
||||
|
||||
#include "../src/core/instrument/engine/live_params.h"
|
||||
|
||||
#include <cmath>
|
||||
#include <cstdio>
|
||||
|
||||
using namespace reasampler;
|
||||
using namespace reasampler::instrument::bake;
|
||||
|
||||
static int g_fail = 0;
|
||||
#define CHECK(cond) do { if(!(cond)) { \
|
||||
std::printf("FAIL line %d: %s\n", __LINE__, #cond); ++g_fail; } } while(0)
|
||||
|
||||
namespace {
|
||||
|
||||
constexpr int kRate = 48000;
|
||||
|
||||
// Distinct per-channel DC so a downmix or a channel duplication is visible in the output
|
||||
// rather than hidden behind two identical channels.
|
||||
SampleData makeSample(bool stereo, std::size_t frames = 1000) {
|
||||
SampleData s;
|
||||
s.frames.assign(frames, 0.5f);
|
||||
if (stereo) s.framesR.assign(frames, -0.25f);
|
||||
s.sampleRate = kRate;
|
||||
s.rootNote = 60;
|
||||
return s;
|
||||
}
|
||||
|
||||
// Peak magnitude of channel 0 over [from, to) output frames.
|
||||
double peakAt(const BakeAudio& audio, std::int64_t from, std::int64_t to) {
|
||||
double peak = 0.0;
|
||||
for (std::int64_t f = from; f < to && f < audio.frameCount(); ++f) {
|
||||
const double v = std::fabs(
|
||||
static_cast<double>(audio.interleaved[static_cast<std::size_t>(
|
||||
f * audio.channelCount)]));
|
||||
if (v > peak) peak = v;
|
||||
}
|
||||
return peak;
|
||||
}
|
||||
|
||||
BakePlan planOf(std::int64_t total, std::int64_t noteOn, std::int64_t noteOff) {
|
||||
BakePlan p;
|
||||
p.totalFrames = total;
|
||||
p.noteOnFrame = noteOn;
|
||||
p.noteOffFrame = noteOff;
|
||||
p.note = 60;
|
||||
p.velocity = 100;
|
||||
p.sampleRate = kRate;
|
||||
return p;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
int main() {
|
||||
// --- Gate, sustain loop active: the render terminates and the gate really released --
|
||||
{
|
||||
SampleData s = makeSample(/*stereo=*/false, /*frames=*/200);
|
||||
// A 100-frame loop over a 200-frame sample: held past the sample end it would cycle
|
||||
// forever, which is exactly the runaway the window has to bound.
|
||||
s.loop = SampleLoop{true, 0, 100};
|
||||
s.play.playMode = PlayMode::Gate;
|
||||
s.play.adsr.releaseFrames = 480; // 10 ms — short enough to finish inside the tail
|
||||
|
||||
const BakePlan plan = planOf(/*total=*/9600, /*noteOn=*/0, /*noteOff=*/4800);
|
||||
const BakeAudio audio = renderBake(s, plan);
|
||||
|
||||
CHECK(audio.frameCount() == 9600); // bounded, not a runaway
|
||||
CHECK(audio.channelCount == 1);
|
||||
// Sounding right up to the release…
|
||||
CHECK(peakAt(audio, 4700, 4800) > 0.4);
|
||||
// …and silent well after it, which only holds if the note-off was honoured: the
|
||||
// loop would otherwise still be cycling at full level here.
|
||||
CHECK(peakAt(audio, 6000, 9600) < 1e-6);
|
||||
}
|
||||
|
||||
// --- Trigger: note-off is ignored, the play span ends the sound -------------------
|
||||
{
|
||||
SampleData s = makeSample(/*stereo=*/false, /*frames=*/1000);
|
||||
s.play.playMode = PlayMode::Trigger;
|
||||
s.play.trigger.lengthFraction = 0.5; // 500 source frames at unity ratio
|
||||
|
||||
const BakePlan plan = planOf(/*total=*/2000, /*noteOn=*/0, /*noteOff=*/100);
|
||||
const BakeAudio audio = renderBake(s, plan);
|
||||
|
||||
CHECK(audio.frameCount() == 2000);
|
||||
// Still sounding past the note-off Trigger ignores…
|
||||
CHECK(peakAt(audio, 200, 400) > 0.4);
|
||||
// …and finished at its own span end, well before the window closes.
|
||||
CHECK(peakAt(audio, 700, 2000) < 1e-6);
|
||||
}
|
||||
|
||||
// --- Channel count preserved; no stereo fold --------------------------------------
|
||||
{
|
||||
SampleData s = makeSample(/*stereo=*/true, /*frames=*/1000);
|
||||
s.play.playMode = PlayMode::Trigger;
|
||||
|
||||
const BakePlan plan = planOf(/*total=*/500, /*noteOn=*/0, /*noteOff=*/500);
|
||||
const BakeAudio audio = renderBake(s, plan);
|
||||
|
||||
CHECK(audio.channelCount == 2);
|
||||
CHECK(audio.frameCount() == 500);
|
||||
CHECK(audio.interleaved.size() == 1000u);
|
||||
// The two channels carry the source's two distinct signals: a downmix would make
|
||||
// them equal, a duplication would make R equal L.
|
||||
CHECK(audio.interleaved[200] > 0.4f);
|
||||
CHECK(audio.interleaved[201] < -0.2f);
|
||||
CHECK(audio.interleaved[201] > -0.3f);
|
||||
}
|
||||
|
||||
// --- Bit-identical repeats ---------------------------------------------------------
|
||||
{
|
||||
SampleData s = makeSample(/*stereo=*/true, /*frames=*/1000);
|
||||
s.loop = SampleLoop{true, 0, 333};
|
||||
s.play.adsr.attackFrames = 97; // a shape whose per-frame state must replay exactly
|
||||
s.play.adsr.releaseFrames = 211;
|
||||
|
||||
const BakePlan plan = planOf(/*total=*/4096, /*noteOn=*/13, /*noteOff=*/2731);
|
||||
const BakeAudio a = renderBake(s, plan);
|
||||
const BakeAudio b = renderBake(s, plan);
|
||||
|
||||
CHECK(a.interleaved.size() == b.interleaved.size());
|
||||
CHECK(!a.interleaved.empty());
|
||||
bool identical = a.interleaved.size() == b.interleaved.size();
|
||||
for (std::size_t i = 0; identical && i < a.interleaved.size(); ++i)
|
||||
identical = (a.interleaved[i] == b.interleaved[i]);
|
||||
CHECK(identical);
|
||||
// The window opened before the note: those frames must be untouched silence.
|
||||
CHECK(peakAt(a, 0, 13) == 0.0);
|
||||
CHECK(peakAt(a, 200, 400) > 0.0);
|
||||
}
|
||||
|
||||
// --- The bake is off the audio thread's block, structurally ------------------------
|
||||
// The only thing process() and a bake could share is the live-parameter block. This
|
||||
// pins that they do not: the caller's SampleData is untouched (renderBake took a
|
||||
// copy), and the render ignores what is published in the block — the bake prints the
|
||||
// dialed parameter set, not whatever the audio thread is currently observing.
|
||||
{
|
||||
instrument::engine::LiveParams block;
|
||||
SampleData s = makeSample(/*stereo=*/false, /*frames=*/1000);
|
||||
s.play.playMode = PlayMode::Trigger;
|
||||
s.play.trigAhd.attackFrames = 0; // dialed: instant attack
|
||||
|
||||
// Publish a MUCH slower attack into the block. A render that observed it would be
|
||||
// near-silent at the point the dialed shape is already at full level.
|
||||
s.live = █
|
||||
{
|
||||
PlayParams slow = s.play;
|
||||
slow.trigAhd.attackFrames = 900;
|
||||
block.publish(instrument::engine::foldLive(slow));
|
||||
}
|
||||
|
||||
const BakePlan plan = planOf(/*total=*/1000, /*noteOn=*/0, /*noteOff=*/1000);
|
||||
const BakeAudio audio = renderBake(s, plan);
|
||||
|
||||
CHECK(s.live == &block); // the caller's own snapshot was not detached
|
||||
// At frame 100 the dialed instant attack is at full level; the published 900-frame
|
||||
// attack would be barely a ninth of the way up.
|
||||
CHECK(peakAt(audio, 90, 110) > 0.4);
|
||||
|
||||
// And it matches a render from a block-free copy exactly.
|
||||
SampleData detached = s;
|
||||
detached.live = nullptr;
|
||||
const BakeAudio reference = renderBake(detached, plan);
|
||||
bool identical = audio.interleaved.size() == reference.interleaved.size();
|
||||
for (std::size_t i = 0; identical && i < audio.interleaved.size(); ++i)
|
||||
identical = (audio.interleaved[i] == reference.interleaved[i]);
|
||||
CHECK(identical);
|
||||
}
|
||||
|
||||
// --- Refusals -----------------------------------------------------------------------
|
||||
{
|
||||
SampleData empty; // nothing decoded
|
||||
empty.sampleRate = kRate;
|
||||
CHECK(renderBake(empty, planOf(1000, 0, 500)).empty());
|
||||
|
||||
SampleData s = makeSample(false);
|
||||
CHECK(renderBake(s, planOf(0, 0, 0)).empty());
|
||||
}
|
||||
|
||||
if (g_fail == 0) std::printf("bake_render: all tests passed\n");
|
||||
return g_fail ? 1 : 0;
|
||||
}
|
||||
Reference in New Issue
Block a user