1 files changed, 77 insertions, 0 deletions
diff --git a/third_party/dav1d/src/pal.c b/third_party/dav1d/src/pal.c
new file mode 100644
index 0000000000..f50c7aa21f
--- /dev/null
+++ b/third_party/dav1d/src/pal.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright © 2023, VideoLAN and dav1d authors
+ * Copyright © 2023, 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 <string.h>
+
+#include "common/attributes.h"
+
+#include "src/pal.h"
+
+// fill invisible edges and pack to 4-bit (2 pixels per byte)
+static void pal_idx_finish_c(uint8_t *dst, const uint8_t *src,
+                             const int bw, const int bh,
+                             const int w, const int h)
+{
+    assert(bw >= 4 && bw <= 64 && !(bw & (bw - 1)));
+    assert(bh >= 4 && bh <= 64 && !(bh & (bh - 1)));
+    assert(w  >= 4 && w <= bw && !(w & 3));
+    assert(h  >= 4 && h <= bh && !(h & 3));
+
+    const int dst_w = w / 2;
+    const int dst_bw = bw / 2;
+
+    for (int y = 0; y < h; y++, src += bw, dst += dst_bw) {
+        for (int x = 0; x < dst_w; x++)
+            dst[x] = src[x * 2 + 0] | (src[x * 2 + 1] << 4);
+        if (dst_w < dst_bw)
+            memset(dst + dst_w, src[w - 1] * 0x11, dst_bw - dst_w);
+    }
+
+    if (h < bh) {
+        const uint8_t *const last_row = &dst[-dst_bw];
+        for (int y = h; y < bh; y++, dst += dst_bw)
+            memcpy(dst, last_row, dst_bw);
+    }
+}
+
+#if HAVE_ASM
+#if ARCH_X86
+#include "src/x86/pal.h"
+#endif
+#endif
+
+COLD void dav1d_pal_dsp_init(Dav1dPalDSPContext *const c) {
+    c->pal_idx_finish = pal_idx_finish_c;
+
+#if HAVE_ASM
+#if ARCH_X86
+    pal_dsp_init_x86(c);
+#endif
+#endif
+}