1 files changed, 61 insertions, 0 deletions
diff --git a/ffmpeg1/libavresample/x86/dither_init.c b/ffmpeg1/libavresample/x86/dither_init.c
new file mode 100644
index 0000000..6532887
--- /dev/null
+++ b/ffmpeg1/libavresample/x86/dither_init.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
+ *
+ * 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 "libavutil/cpu.h"
+#include "libavutil/x86/cpu.h"
+#include "libavresample/dither.h"
+
+extern void ff_quantize_sse2(int16_t *dst, const float *src, float *dither,
+                             int len);
+
+extern void ff_dither_int_to_float_rectangular_sse2(float *dst, int *src, int len);
+extern void ff_dither_int_to_float_rectangular_avx(float *dst, int *src, int len);
+
+extern void ff_dither_int_to_float_triangular_sse2(float *dst, int *src0, int len);
+extern void ff_dither_int_to_float_triangular_avx(float *dst, int *src0, int len);
+
+av_cold void ff_dither_init_x86(DitherDSPContext *ddsp,
+                                enum AVResampleDitherMethod method)
+{
+    int mm_flags = av_get_cpu_flags();
+
+    if (EXTERNAL_SSE2(mm_flags)) {
+        ddsp->quantize      = ff_quantize_sse2;
+        ddsp->ptr_align     = 16;
+        ddsp->samples_align = 8;
+    }
+
+    if (method == AV_RESAMPLE_DITHER_RECTANGULAR) {
+        if (EXTERNAL_SSE2(mm_flags)) {
+            ddsp->dither_int_to_float = ff_dither_int_to_float_rectangular_sse2;
+        }
+        if (EXTERNAL_AVX(mm_flags)) {
+            ddsp->dither_int_to_float = ff_dither_int_to_float_rectangular_avx;
+        }
+    } else {
+        if (EXTERNAL_SSE2(mm_flags)) {
+            ddsp->dither_int_to_float = ff_dither_int_to_float_triangular_sse2;
+        }
+        if (EXTERNAL_AVX(mm_flags)) {
+            ddsp->dither_int_to_float = ff_dither_int_to_float_triangular_avx;
+        }
+    }
+}