1 files changed, 51 insertions, 0 deletions
diff --git a/libavcodec/x86/pngdsp_init.c b/libavcodec/x86/pngdsp_init.c
new file mode 100644
index 0000000000..7a12730620
--- /dev/null
+++ b/libavcodec/x86/pngdsp_init.c
@@ -0,0 +1,51 @@
+/*
+ * x86 PNG optimizations.
+ * Copyright (c) 2008 Loren Merrit <lorenm@u.washington.edu>
+ *
+ * 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 "libavutil/common.h"
+#include "libavutil/cpu.h"
+#include "libavcodec/pngdsp.h"
+
+void ff_add_png_paeth_prediction_mmx2 (uint8_t *dst, uint8_t *src,
+                                       uint8_t *top, int w, int bpp);
+void ff_add_png_paeth_prediction_ssse3(uint8_t *dst, uint8_t *src,
+                                       uint8_t *top, int w, int bpp);
+void ff_add_bytes_l2_mmx (uint8_t *dst, uint8_t *src1,
+                          uint8_t *src2, int w);
+void ff_add_bytes_l2_sse2(uint8_t *dst, uint8_t *src1,
+                          uint8_t *src2, int w);
+
+void ff_pngdsp_init_x86(PNGDSPContext *dsp)
+{
+#if HAVE_YASM
+    int flags = av_get_cpu_flags();
+
+#if ARCH_X86_32
+    if (flags & AV_CPU_FLAG_MMX)
+        dsp->add_bytes_l2         = ff_add_bytes_l2_mmx;
+#endif
+    if (flags & AV_CPU_FLAG_MMXEXT)
+        dsp->add_paeth_prediction = ff_add_png_paeth_prediction_mmx2;
+    if (flags & AV_CPU_FLAG_SSE2)
+        dsp->add_bytes_l2         = ff_add_bytes_l2_sse2;
+    if (flags & AV_CPU_FLAG_SSSE3)
+        dsp->add_paeth_prediction = ff_add_png_paeth_prediction_ssse3;
+#endif
+}