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, 49 insertions, 0 deletions

diff --git a/src/getbits.h b/src/getbits.h
new file mode 100644
index 0000000..1a2c940
--- /dev/null
+++ b/src/getbits.h
@@ -0,0 +1,49 @@
+/*
+ * 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.
+ */
+
+#ifndef __DAV1D_SRC_GETBITS_H__
+#define __DAV1D_SRC_GETBITS_H__
+
+#include <stddef.h>
+#include <stdint.h>
+
+typedef struct GetBits {
+    int error, eof;
+    uint64_t state;
+    unsigned bits_left;
+    const uint8_t *ptr, *ptr_start, *ptr_end;
+} GetBits;
+
+void init_get_bits(GetBits *c, const uint8_t *data, size_t sz);
+unsigned get_bits(GetBits *c, unsigned n);
+int get_sbits(GetBits *c, unsigned n);
+unsigned get_uniform(GetBits *c, unsigned range);
+unsigned get_vlc(GetBits *c);
+int get_bits_subexp(GetBits *c, int ref, unsigned n);
+const uint8_t *flush_get_bits(GetBits *c);
+
+#endif /* __DAV1D_SRC_GETBITS_H__ */