yes

.gitignore

@@ -2,3 +2,4 @@ build/
 .vscode/
 
 *.flac
+*.html

src/easy.c

@@ -26,6 +26,13 @@ const LilvPlugin* easy_load_plugin(LilvWorld* world, const char* uri) {
             lilv_node_free(defNode);
 
             printf("Port %d: %s = %f\n", i, name, defaultValue);
+
+            LilvNodes *classes = lilv_port_get_classes(plugin, port);
+            LILV_FOREACH(nodes, i, classes) {
+                LilvNode *n = lilv_nodes_get(classes, i);
+                printf("  %s\n", lilv_node_as_uri(n));
+            }
+
         }
     }
 

src/main.c

@@ -3,11 +3,12 @@
 #include <sndfile.h>
 #include <string.h>
 #include <time.h>
+#include <errno.h>
 
 #include "easy.h"
 #include "audiofile.h"
 
-#define BUFFER_SIZE 256 // this is per channel
+#define BUFFER_SIZE 8192 // this is per channel
 
 /*
 http://lsp-plug.in/plugins/lv2/comp_delay_x2_stereo
@@ -25,7 +26,7 @@ int main(int argc, char *argv[]) {
     char *output_filename;
 
     if (argc < 3) {
-        output_filename = malloc((strlen(input_filename) + 4) * sizeof(char));
+        output_filename = malloc((strlen(input_filename) + 5) * sizeof(char));
         strcpy(output_filename, "out-");
         strcat(output_filename, input_filename);
     } else {
@@ -50,7 +51,19 @@ int main(int argc, char *argv[]) {
 
     audiofile_copy_metadata(in_sndfile, out_sndfile);
     
-    // load lilv plugin
+    // prepare lilv instance
+
+    float input_left[BUFFER_SIZE];
+    float input_right[BUFFER_SIZE];
+    float output_left[BUFFER_SIZE];
+    float output_right[BUFFER_SIZE];
+
+    const int instancesCount = 10;
+    LilvInstance **instances = malloc(instancesCount * sizeof(LilvInstance*));
+    if (instances == NULL) {
+        fprintf(stderr, "mallocing instances failed: %s\n", strerror(errno));
+        return 1;
+    }
 
     const LilvPlugin* plugin = easy_load_plugin(world, "http://lsp-plug.in/plugins/lv2/comp_delay_x2_stereo");
     if (plugin == NULL) {
@@ -58,34 +71,38 @@ int main(int argc, char *argv[]) {
         return 1;
     }
 
-    // prepare lilv instance
+    float *knob_enabled = malloc(instancesCount * sizeof(float));
+    for (int i=0; i<instancesCount; i++) knob_enabled[i] = 1.0f;
 
+    float *knob_mode = malloc(instancesCount * sizeof(float));
+    for (int i=0; i<instancesCount; i++) knob_mode[i] = 2.0f;
+
+    float *knob_time = malloc(instancesCount * sizeof(float));
+    for (int i=0; i<instancesCount; i++) knob_time[i] = 100.0f; // ms
+
+    for (int i=0; i<instancesCount; i++) {
         LilvInstance *instance = lilv_plugin_instantiate(plugin, sfinfo.samplerate, NULL);
+        if (instance == NULL) {
+            fprintf(stderr, "Instance %d initialization failed\n", i);
+            return 1;
+        }
 
-    float knob_enabled = 1;
-    lilv_instance_connect_port(instance, 4, &knob_enabled);
+        lilv_instance_connect_port(instance, 4, knob_enabled);
+        lilv_instance_connect_port(instance, 16, knob_mode);
 
-    float knob_mode = 2;
-    lilv_instance_connect_port(instance, 16, &knob_mode);
-
-    float knob_time = 50.0f; // ms
-    lilv_instance_connect_port(instance, 22, &knob_time);
-
-    //
-
-    float input_left[BUFFER_SIZE];
-    float input_right[BUFFER_SIZE];
-    float output_left[BUFFER_SIZE];
-    float output_right[BUFFER_SIZE];
+        lilv_instance_connect_port(instance, 22, knob_time);
 
         lilv_instance_connect_port(instance, 0, input_left); // Input L
         lilv_instance_connect_port(instance, 1, input_right); // Input R
         lilv_instance_connect_port(instance, 2, output_left); // Output L
         lilv_instance_connect_port(instance, 3, output_right); // Output R
 
+        lilv_instance_activate(instance);
+        instances[i] = instance;
+    }
+    
     // start processing
 
-    lilv_instance_activate(instance);
     printf("Now processing\n");
     clock_t start = clock();
 
@@ -99,7 +116,15 @@ int main(int argc, char *argv[]) {
             input_right[i] = input_buffer[i * 2 + 1];
         }
 
-        lilv_instance_run(instance, frames_read);
+        for (int i=0; i<instancesCount; i++) {
+            lilv_instance_run(instances[i], frames_read);
+            // TODO maybe I don't have to
+            if (i + 1 != instancesCount) {
+                memcpy(input_left, output_left, frames_read * sizeof(float));
+                memcpy(input_right, output_right, frames_read * sizeof(float));
+            }
+        }
+
 
         for (sf_count_t i = 0; i < frames_read; i++) {
             output_buffer[i * 2] = output_left[i];
@@ -110,12 +135,16 @@ int main(int argc, char *argv[]) {
     }
 
     clock_t end = clock();
-    printf("Done processing. Took %ldns\n", (long)((double)(end - start) / CLOCKS_PER_SEC * 1000000));
+    printf("Done processing. Took %ldms\n", (clock_t)((double)(end - start) / CLOCKS_PER_SEC * 1000));
 
     // end processing
 
+    for (int i=0; i<instancesCount; i++) {
+        LilvInstance *instance = instances[i];
         lilv_instance_deactivate(instance);
         lilv_instance_free(instance);
+    }
+    free(instances);
 
     lilv_world_free(world);