SIMD opus pvq_search implementation

Explanation on the workings and methods used by the
Pyramid Vector Quantization Search function
could be found in the following Work-In-Progress mail threads:
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-June/212146.html
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-June/212816.html
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-July/213030.html
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-July/213436.html

Signed-off-by: Ivan Kalvachev <ikalvachev@gmail.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/libavcodec/x86/opus_dsp_init.c b/libavcodec/x86/opus_dsp_init.c
new file mode 100644
index 0000000000..c51f786ee8
--- /dev/null
+++ b/libavcodec/x86/opus_dsp_init.c
@@ -0,0 +1,45 @@
+/*
+ * Opus encoder assembly optimizations
+ * Copyright (C) 2017 Ivan Kalvachev <ikalvachev@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/x86/cpu.h"
+#include "libavcodec/opus_pvq.h"
+
+extern float ff_pvq_search_sse2(float *X, int *y, int K, int N);
+extern float ff_pvq_search_sse4(float *X, int *y, int K, int N);
+extern float ff_pvq_search_avx (float *X, int *y, int K, int N);
+
+av_cold void ff_opus_dsp_init_x86(CeltPVQ *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+#if CONFIG_OPUS_ENCODER
+    if (EXTERNAL_SSE2(cpu_flags))
+        s->pvq_search = ff_pvq_search_sse2;
+
+    if (EXTERNAL_SSE4(cpu_flags))
+        s->pvq_search = ff_pvq_search_sse4;
+
+    if (EXTERNAL_AVX(cpu_flags))
+        s->pvq_search = ff_pvq_search_avx;
+#endif
+}