x86/dcadec: add ff_lfe_fir0_float_{sse,sse2,avx,fma3}

Up to ~4 times faster on x86_64, ~8 times on x86_32 if compiling using x87 fp math.

Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/libavcodec/x86/dcadsp_init.c b/libavcodec/x86/dcadsp_init.c
new file mode 100644
index 0000000000..bfe13e5a71
--- /dev/null
+++ b/libavcodec/x86/dcadsp_init.c
@@ -0,0 +1,45 @@
+/*
+ * 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/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/x86/cpu.h"
+#include "libavcodec/dcadsp.h"
+
+#define LFE_FIR_FLOAT_FUNC(opt)                                               \
+void ff_lfe_fir0_float_##opt(float *pcm_samples, int32_t *lfe_samples,         \
+                             const float *filter_coeff, ptrdiff_t npcmblocks);
+
+LFE_FIR_FLOAT_FUNC(sse)
+LFE_FIR_FLOAT_FUNC(sse2)
+LFE_FIR_FLOAT_FUNC(avx)
+LFE_FIR_FLOAT_FUNC(fma3)
+
+av_cold void ff_dcadsp_init_x86(DCADSPContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (ARCH_X86_32 && EXTERNAL_SSE(cpu_flags))
+        s->lfe_fir_float[0] = ff_lfe_fir0_float_sse;
+    if (EXTERNAL_SSE2(cpu_flags))
+        s->lfe_fir_float[0] = ff_lfe_fir0_float_sse2;
+    if (EXTERNAL_AVX(cpu_flags))
+        s->lfe_fir_float[0] = ff_lfe_fir0_float_avx;
+    if (EXTERNAL_FMA3(cpu_flags))
+        s->lfe_fir_float[0] = ff_lfe_fir0_float_fma3;
+}