DCA: break out lfe_interpolation_fir() inner loops to a function

This enables SIMD optimisations of this function.

Originally committed as revision 22861 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 29 insertions, 0 deletions

diff --git a/libavcodec/dcadsp.h b/libavcodec/dcadsp.h
new file mode 100644
index 0000000000..807fe1cdbc
--- /dev/null
+++ b/libavcodec/dcadsp.h
@@ -0,0 +1,29 @@
+/*
+ * 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
+ */
+
+#ifndef AVCODEC_DCADSP_H
+#define AVCODEC_DCADSP_H
+
+typedef struct DCADSPContext {
+    void (*lfe_fir)(float *out, const float *in, const float *coefs,
+                    int decifactor, float scale, float bias);
+} DCADSPContext;
+
+void ff_dcadsp_init(DCADSPContext *s);
+
+#endif /* AVCODEC_DCADSP_H */