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Diffstat (limited to 'libavutil/x86/pixelutils_init.c')
-rw-r--r--libavutil/x86/pixelutils_init.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/libavutil/x86/pixelutils_init.c b/libavutil/x86/pixelutils_init.c
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+++ b/libavutil/x86/pixelutils_init.c
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+/*
+ * 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 "pixelutils.h"
+#include "cpu.h"
+
+int ff_pixelutils_sad_8x8_mmx(const uint8_t *src1, ptrdiff_t stride1,
+ const uint8_t *src2, ptrdiff_t stride2);
+int ff_pixelutils_sad_8x8_mmxext(const uint8_t *src1, ptrdiff_t stride1,
+ const uint8_t *src2, ptrdiff_t stride2);
+
+int ff_pixelutils_sad_16x16_mmxext(const uint8_t *src1, ptrdiff_t stride1,
+ const uint8_t *src2, ptrdiff_t stride2);
+int ff_pixelutils_sad_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
+ const uint8_t *src2, ptrdiff_t stride2);
+int ff_pixelutils_sad_a_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
+ const uint8_t *src2, ptrdiff_t stride2);
+int ff_pixelutils_sad_u_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
+ const uint8_t *src2, ptrdiff_t stride2);
+
+void ff_pixelutils_sad_init_x86(av_pixelutils_sad_fn *sad, int aligned)
+{
+ int cpu_flags = av_get_cpu_flags();
+
+ if (EXTERNAL_MMX(cpu_flags)) {
+ sad[2] = ff_pixelutils_sad_8x8_mmx;
+ }
+
+ // The best way to use SSE2 would be to do 2 SADs in parallel,
+ // but we'd have to modify the pixelutils API to return SIMD functions.
+
+ // It's probably not faster to shuffle data around
+ // to get two lines of 8 pixels into a single 16byte register,
+ // so just use the MMX 8x8 version even when SSE2 is available.
+ if (EXTERNAL_MMXEXT(cpu_flags)) {
+ sad[2] = ff_pixelutils_sad_8x8_mmxext;
+ sad[3] = ff_pixelutils_sad_16x16_mmxext;
+ }
+
+ if (EXTERNAL_SSE2(cpu_flags)) {
+ switch (aligned) {
+ case 0: sad[3] = ff_pixelutils_sad_16x16_sse2; break; // src1 unaligned, src2 unaligned
+ case 1: sad[3] = ff_pixelutils_sad_u_16x16_sse2; break; // src1 aligned, src2 unaligned
+ case 2: sad[3] = ff_pixelutils_sad_a_16x16_sse2; break; // src1 aligned, src2 aligned
+ }
+ }
+}