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-rw-r--r--libavcodec/celp_math.h47
1 files changed, 43 insertions, 4 deletions
diff --git a/libavcodec/celp_math.h b/libavcodec/celp_math.h
index ed3f8c0fe2..18d3ad94d1 100644
--- a/libavcodec/celp_math.h
+++ b/libavcodec/celp_math.h
@@ -3,20 +3,20 @@
*
* Copyright (c) 2008 Vladimir Voroshilov
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -25,6 +25,25 @@
#include <stdint.h>
+typedef struct CELPMContext {
+ /**
+ * Return the dot product.
+ * @param a input data array
+ * @param b input data array
+ * @param length number of elements
+ *
+ * @return dot product = sum of elementwise products
+ */
+ float (*dot_productf)(const float* a, const float* b, int length);
+
+}CELPMContext;
+
+/**
+ * Initialize CELPMContext.
+ */
+void ff_celp_math_init(CELPMContext *c);
+void ff_celp_math_init_mips(CELPMContext *c);
+
/**
* fixed-point implementation of exp2(x) in [0; 1] domain.
* @param power argument to exp2, 0 <= power <= 0x7fff
@@ -55,4 +74,24 @@ static inline int bidir_sal(int value, int offset)
else return value << offset;
}
+/**
+ * returns the dot product of 2 int16_t vectors.
+ * @param a input data array
+ * @param b input data array
+ * @param length number of elements
+ *
+ * @return dot product = sum of elementwise products
+ */
+int64_t ff_dot_product(const int16_t *a, const int16_t *b, int length);
+
+/**
+ * Return the dot product.
+ * @param a input data array
+ * @param b input data array
+ * @param length number of elements
+ *
+ * @return dot product = sum of elementwise products
+ */
+float ff_dot_productf(const float* a, const float* b, int length);
+
#endif /* AVCODEC_CELP_MATH_H */