Added VST SDK support.

tests/integration/test_steinberg_sdk.c

@@ -0,0 +1,59 @@
+#define _POSIX_C_SOURCE 200809L
+#include "xtc/xtc_plugin.h"
+#include "xtc/xtc_project.h"
+#include <stdlib.h>
+#include <unistd.h>
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+int main(int argc, char **argv)
+{
+    xtc_plugin_spec gain, synth, actual;
+    xtc_plugin *g = NULL, *s = NULL;
+    float in[256], out[256], wet[256];
+    size_t i;
+    xtc_project *project = NULL, *loaded = NULL;
+    uint64_t track;
+    char document[] = "/tmp/xtc-sdk-project-XXXXXX";
+    int fd;
+    xtc_midi_event events[] = {
+        {0}, {0}
+    };
+    assert(argc == 2 && argv[1][0] == '/');
+    assert(xtc_plugin_probe(argv[1],0,48000,&gain) == XTC_OK);
+    assert(gain.format == XTC_PLUGIN_VST3 && gain.inputs == 1 && !gain.instrument);
+    assert(!strcmp(gain.path,argv[1]) && !strcmp(gain.label,"xtc SDK Half Gain"));
+    assert(xtc_plugin_probe_format(XTC_PLUGIN_VST3,argv[1],1,48000,&synth) == XTC_OK);
+    assert(synth.instrument && !synth.inputs && strcmp(synth.identifier,gain.identifier));
+    assert(xtc_plugin_probe(argv[1],2,48000,&actual) == XTC_ERR_UNSUPPORTED); /* Controller, not audio. */
+    assert(xtc_plugin_probe(argv[1],3,48000,&actual) == XTC_ERR_NOT_FOUND);
+    assert(xtc_project_create(&project) == XTC_OK && xtc_project_create(&loaded) == XTC_OK);
+    assert(xtc_project_add_track(project,"SDK Sine",&track) == XTC_OK);
+    assert(xtc_project_set_instrument(project,track,&synth) == XTC_OK);
+    fd = mkstemp(document); assert(fd >= 0 && close(fd) == 0);
+    assert(xtc_project_save(project,document) == XTC_OK && xtc_project_load(loaded,document) == XTC_OK);
+    assert(xtc_project_get_instrument(loaded,track,&actual) == XTC_OK);
+    assert(!strcmp(actual.path,argv[1]) && !strcmp(actual.identifier,synth.identifier));
+    assert(unlink(document) == 0); xtc_project_destroy(project); xtc_project_destroy(loaded);
+    assert(xtc_plugin_create(&gain,48000,256,&g) == XTC_OK);
+    assert(xtc_plugin_create(&synth,48000,256,&s) == XTC_OK);
+    for (i = 0; i < 256; ++i) in[i] = i % 2 ? -.75f : .25f;
+    assert(xtc_plugin_process_at(g,in,out,256,48000) == XTC_OK);
+    for (i = 0; i < 256; ++i) assert(out[i] == in[i]*.5f);
+    events[0].type = XTC_MIDI_NOTE_ON; events[0].offset = 13;
+    events[0].channel = 3; events[0].pitch = 69; events[0].velocity = 127;
+    events[1] = events[0]; events[1].type = XTC_MIDI_NOTE_OFF; events[1].offset = 200;
+    assert(xtc_plugin_process_midi_at(s,events,2,out,256,0) == XTC_OK);
+    for (i = 0; i <= 13; ++i) assert(out[i] == 0);
+    assert(fabsf(out[40]) > .05f);
+    for (i = 200; i < 256; ++i) assert(out[i] == 0);
+    assert(xtc_plugin_process(g,out,wet,256) == XTC_OK);
+    for (i = 0; i < 256; ++i) assert(wet[i] == out[i]*.5f && isfinite(wet[i]));
+    assert(xtc_plugin_process_midi(s,NULL,0,out,256) == XTC_OK);
+    for (i = 0; i < 256; ++i) assert(out[i] == 0);
+    xtc_plugin_destroy(g); xtc_plugin_destroy(s);
+    puts("Official SDK gain/synth: bundle discovery, identities, processing, note offsets and release passed.");
+    return 0;
+}