Rename ffmpeg-4.2-fit to ffmpeg-4-fit

trunk/3rdparty/ffmpeg-4-fit/libavutil/pixelutils.c

@@ -0,0 +1,89 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "common.h"
+#include "pixelutils.h"
+#include "internal.h"
+
+#if CONFIG_PIXELUTILS
+
+#include "x86/pixelutils.h"
+
+static av_always_inline int sad_wxh(const uint8_t *src1, ptrdiff_t stride1,
+                                    const uint8_t *src2, ptrdiff_t stride2,
+                                    int w, int h)
+{
+    int x, y, sum = 0;
+
+    for (y = 0; y < h; y++) {
+        for (x = 0; x < w; x++)
+            sum += abs(src1[x] - src2[x]);
+        src1 += stride1;
+        src2 += stride2;
+    }
+    return sum;
+}
+
+#define DECLARE_BLOCK_FUNCTIONS(size)                                               \
+static int block_sad_##size##x##size##_c(const uint8_t *src1, ptrdiff_t stride1,    \
+                                         const uint8_t *src2, ptrdiff_t stride2)    \
+{                                                                                   \
+    return sad_wxh(src1, stride1, src2, stride2, size, size);                       \
+}
+
+DECLARE_BLOCK_FUNCTIONS(2)
+DECLARE_BLOCK_FUNCTIONS(4)
+DECLARE_BLOCK_FUNCTIONS(8)
+DECLARE_BLOCK_FUNCTIONS(16)
+DECLARE_BLOCK_FUNCTIONS(32)
+
+static const av_pixelutils_sad_fn sad_c[] = {
+    block_sad_2x2_c,
+    block_sad_4x4_c,
+    block_sad_8x8_c,
+    block_sad_16x16_c,
+    block_sad_32x32_c,
+};
+
+#endif /* CONFIG_PIXELUTILS */
+
+av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx)
+{
+#if !CONFIG_PIXELUTILS
+    av_log(log_ctx, AV_LOG_ERROR, "pixelutils support is required "
+           "but libavutil is not compiled with it\n");
+    return NULL;
+#else
+    av_pixelutils_sad_fn sad[FF_ARRAY_ELEMS(sad_c)];
+
+    memcpy(sad, sad_c, sizeof(sad));
+
+    if (w_bits < 1 || w_bits > FF_ARRAY_ELEMS(sad) ||
+        h_bits < 1 || h_bits > FF_ARRAY_ELEMS(sad))
+        return NULL;
+    if (w_bits != h_bits) // only squared sad for now
+        return NULL;
+
+#if ARCH_X86
+    ff_pixelutils_sad_init_x86(sad, aligned);
+#endif
+
+    return sad[w_bits - 1];
+#endif
+}