x86/alacdsp: add simd optimized functions

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/libavcodec/x86/alacdsp_init.c b/libavcodec/x86/alacdsp_init.c
new file mode 100644
index 0000000000..de5dae6c77
--- /dev/null
+++ b/libavcodec/x86/alacdsp_init.c
@@ -0,0 +1,44 @@
+/*
+ * 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/x86/cpu.h"
+#include "libavcodec/alacdsp.h"
+#include "config.h"
+
+void ff_alac_decorrelate_stereo_sse4(int32_t *buffer[2], int nb_samples,
+                                     int decorr_shift, int decorr_left_weight);
+void ff_alac_append_extra_bits_stereo_sse2(int32_t *buffer[2], int32_t *extra_bits_buffer[2],
+                                           int extra_bits, int channels, int nb_samples);
+void ff_alac_append_extra_bits_mono_sse2(int32_t *buffer[2], int32_t *extra_bits_buffer[2],
+                                         int extra_bits, int channels, int nb_samples);
+
+av_cold void ff_alacdsp_init_x86(ALACDSPContext *c)
+{
+#if HAVE_YASM
+    int cpu_flags = av_get_cpu_flags();
+
+    if (EXTERNAL_SSE2(cpu_flags)) {
+        c->append_extra_bits[0] = ff_alac_append_extra_bits_mono_sse2;
+        c->append_extra_bits[1] = ff_alac_append_extra_bits_stereo_sse2;
+    }
+    if (EXTERNAL_SSE4(cpu_flags)) {
+        c->decorrelate_stereo   = ff_alac_decorrelate_stereo_sse4;
+    }
+#endif /* HAVE_YASM */
+}