comparison projects/heavy/circularBuffer/ControlDelay.c @ 163:20b52283c7b4 heavy-updated

- added circular buffer pd/heavy example (works but process needs to be killed manually if launched via ssh?)

+/**
+ * Copyright (c) 2014, 2015, Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "ControlDelay.h"
+
+hv_size_t cDelay_init(HvBase *_c, ControlDelay *o, float delayMs) {
+  o->delay = ctx_millisecondsToSamples(_c, delayMs);
+  hv_memset(o->msgs, __HV_DELAY_MAX_MESSAGES*sizeof(HvMessage *));
+  return 0;
+}
+
+void cDelay_onMessage(HvBase *_c, ControlDelay *o, int letIn, const HvMessage *const m,
+    void (*sendMessage)(HvBase *, int, const HvMessage *const)) {
+  switch (letIn) {
+    case 0: {
+      if (msg_compareSymbol(m, 0, "flush")) {
+        // send all messages immediately
+        for (int i = 0; i < __HV_DELAY_MAX_MESSAGES; i++) {
+          HvMessage *n = o->msgs[i];
+          if (n != NULL) {
+            msg_setTimestamp(n, msg_getTimestamp(m)); // update the timestamp to now
+            sendMessage(_c, 0, n); // send the message
+            ctx_cancelMessage(_c, n, sendMessage); // then clear it
+            // NOTE(mhroth): there may be a problem here if a flushed message causes a clear message to return
+            // to this object in the same step
+          }
+        }
+        hv_memset(o->msgs, __HV_DELAY_MAX_MESSAGES*sizeof(HvMessage *));
+      } else if (msg_compareSymbol(m, 0, "clear")) {
+        // cancel (clear) all (pending) messages
+        for (int i = 0; i < __HV_DELAY_MAX_MESSAGES; i++) {
+          HvMessage *n = o->msgs[i];
+          if (n != NULL) {
+            ctx_cancelMessage(_c, n, sendMessage);
+          }
+        }
+        hv_memset(o->msgs, __HV_DELAY_MAX_MESSAGES*sizeof(HvMessage *));
+      } else {
+        hv_uint32_t ts = msg_getTimestamp(m);
+        msg_setTimestamp((HvMessage *) m, ts+o->delay); // update the timestamp to set the delay
+        int i;
+        for (i = 0; i < __HV_DELAY_MAX_MESSAGES; i++) {
+          if (o->msgs[i] == NULL) {
+            o->msgs[i] = ctx_scheduleMessage(_c, m, sendMessage, 0);
+            break;
+          }
+        }
+        hv_assert(i < __HV_DELAY_MAX_MESSAGES); // scheduled message limit reached
+        msg_setTimestamp((HvMessage *) m, ts); // return to the original timestamp
+      }
+      break;
+    }
+    case 1: {
+      if (msg_isFloat(m,0)) {
+        // set delay in milliseconds
+        o->delay = ctx_millisecondsToSamples(_c,msg_getFloat(m,0));
+      }
+      break;
+    }
+    case 2: {
+      if (msg_isFloat(m,0)) {
+        // set delay in samples
+        o->delay = (hv_uint32_t) msg_getFloat(m,0);
+      }
+      break;
+    }
+    default: break;
+  }
+}
+
+void cDelay_clearExecutingMessage(ControlDelay *o, const HvMessage *const m) {
+  for (int i = 0; i < __HV_DELAY_MAX_MESSAGES; ++i) {
+    if (o->msgs[i] == m) {
+      o->msgs[i] = NULL;
+      break;
+    }
+  }
+}