Debug

The playing beginning artifact appears again.

Author: Cuda-Chen

virtio-snd.c

@@ -842,10 +842,10 @@ static void __virtio_snd_frame_enqueue(void *payload,
     /* Write payload to ring buffer. */
     uint32_t size = props->ring.prod.size;
     uint32_t idx = prod_head % size;
-    /*fprintf(stderr,
-            "prod_head %" PRIu32 " prod_next %" PRIu32 " mask %" PRIu32
-            " idx %" PRIu32 "\n",
-            prod_head, prod_next, mask, idx);*/
+    fprintf(stderr,
+            "prod_head %" PRIu32 " prod_next %" PRIu32 " cons_tail %" PRIu32
+            " mask %" PRIu32 " idx %" PRIu32 "\n",
+            prod_head, prod_next, cons_tail, mask, idx);
     if (idx + n < size) {
         memcpy(props->ring.buffer + idx, payload, n);
     } else {
@@ -858,9 +858,9 @@ static void __virtio_snd_frame_enqueue(void *payload,
     props->ring.prod.tail = prod_next;
 
     uint32_t buffer_bytes = props->pp.buffer_bytes;
-    if (mask + cons_tail - prod_next >= buffer_bytes) {
+    if (prod_next - cons_tail >= buffer_bytes) {
         fprintf(stderr, "buffer ready for %" PRIu32 "\n",
-                mask + cons_tail - prod_next);
+                prod_next - cons_tail);
         props->ring.buf_ev_notity++;
         pthread_cond_signal(&props->ring.readable);
     }