Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 108 insertions, 0 deletions

diff --git a/third_party/dav1d/src/msac.h b/third_party/dav1d/src/msac.h
new file mode 100644
index 0000000000..eb04f58f81
--- /dev/null
+++ b/third_party/dav1d/src/msac.h
@@ -0,0 +1,108 @@
+/*
+ * 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_MSAC_H
+#define DAV1D_SRC_MSAC_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "common/intops.h"
+
+typedef size_t ec_win;
+
+typedef struct MsacContext {
+    const uint8_t *buf_pos;
+    const uint8_t *buf_end;
+    ec_win dif;
+    unsigned rng;
+    int cnt;
+    int allow_update_cdf;
+
+#if ARCH_X86_64 && HAVE_ASM
+    unsigned (*symbol_adapt16)(struct MsacContext *s, uint16_t *cdf, size_t n_symbols);
+#endif
+} MsacContext;
+
+#if HAVE_ASM
+#if ARCH_AARCH64 || ARCH_ARM
+#include "src/arm/msac.h"
+#elif ARCH_X86
+#include "src/x86/msac.h"
+#endif
+#endif
+
+void dav1d_msac_init(MsacContext *s, const uint8_t *data, size_t sz,
+                     int disable_cdf_update_flag);
+unsigned dav1d_msac_decode_symbol_adapt_c(MsacContext *s, uint16_t *cdf,
+                                          size_t n_symbols);
+unsigned dav1d_msac_decode_bool_adapt_c(MsacContext *s, uint16_t *cdf);
+unsigned dav1d_msac_decode_bool_equi_c(MsacContext *s);
+unsigned dav1d_msac_decode_bool_c(MsacContext *s, unsigned f);
+unsigned dav1d_msac_decode_hi_tok_c(MsacContext *s, uint16_t *cdf);
+int dav1d_msac_decode_subexp(MsacContext *s, int ref, int n, unsigned k);
+
+/* Supported n_symbols ranges: adapt4: 1-4, adapt8: 1-7, adapt16: 3-15 */
+#ifndef dav1d_msac_decode_symbol_adapt4
+#define dav1d_msac_decode_symbol_adapt4  dav1d_msac_decode_symbol_adapt_c
+#endif
+#ifndef dav1d_msac_decode_symbol_adapt8
+#define dav1d_msac_decode_symbol_adapt8  dav1d_msac_decode_symbol_adapt_c
+#endif
+#ifndef dav1d_msac_decode_symbol_adapt16
+#define dav1d_msac_decode_symbol_adapt16 dav1d_msac_decode_symbol_adapt_c
+#endif
+#ifndef dav1d_msac_decode_bool_adapt
+#define dav1d_msac_decode_bool_adapt     dav1d_msac_decode_bool_adapt_c
+#endif
+#ifndef dav1d_msac_decode_bool_equi
+#define dav1d_msac_decode_bool_equi      dav1d_msac_decode_bool_equi_c
+#endif
+#ifndef dav1d_msac_decode_bool
+#define dav1d_msac_decode_bool           dav1d_msac_decode_bool_c
+#endif
+#ifndef dav1d_msac_decode_hi_tok
+#define dav1d_msac_decode_hi_tok         dav1d_msac_decode_hi_tok_c
+#endif
+
+static inline unsigned dav1d_msac_decode_bools(MsacContext *const s, unsigned n) {
+    unsigned v = 0;
+    while (n--)
+        v = (v << 1) | dav1d_msac_decode_bool_equi(s);
+    return v;
+}
+
+static inline int dav1d_msac_decode_uniform(MsacContext *const s, const unsigned n) {
+    assert(n > 0);
+    const int l = ulog2(n) + 1;
+    assert(l > 1);
+    const unsigned m = (1 << l) - n;
+    const unsigned v = dav1d_msac_decode_bools(s, l - 1);
+    return v < m ? v : (v << 1) - m + dav1d_msac_decode_bool_equi(s);
+}
+
+#endif /* DAV1D_SRC_MSAC_H */