Initial decoder implementation.

With minor contributions from:
 - Jean-Baptiste Kempf <jb@videolan.org>
 - Marvin Scholz <epirat07@gmail.com>
 - Hugo Beauzée-Luyssen <hugo@videolan.org>

1 files changed, 60 insertions, 0 deletions

diff --git a/src/ref.c b/src/ref.c
new file mode 100644
index 0000000..b0bf7ac
--- /dev/null
+++ b/src/ref.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright © 2018, VideoLAN and dav1d authors
+ * Copyright © 2018, Two Orioles, LLC
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include "common/mem.h"
+
+#include "src/ref.h"
+
+Dav1dRef *dav1d_ref_create(const size_t size) {
+    Dav1dRef *res = malloc(sizeof(Dav1dRef));
+    void *data = dav1d_alloc_aligned(size, 32);
+
+    if (!res || !data) {
+        if (res) free(res);
+        if (data) free(data);
+        return NULL;
+    }
+
+    res->size = size;
+    atomic_init(&res->ref_cnt, 1);
+    res->data = data;
+
+    return res;
+}
+
+void dav1d_ref_inc(Dav1dRef *const ref) {
+    atomic_fetch_add(&ref->ref_cnt, 1);
+}
+
+void dav1d_ref_dec(Dav1dRef *const ref) {
+    if (atomic_fetch_sub(&ref->ref_cnt, 1) == 1) {
+        dav1d_free_aligned(ref->data);
+        free(ref);
+    }
+}