Commit some functions that are used by both SIPR and AMR.

Based on AMR SoC code by Robert Swain and Colin McQuillan.

Originally committed as revision 20392 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 19 insertions, 0 deletions

diff --git a/libavcodec/acelp_filters.h b/libavcodec/acelp_filters.h
index 2cbe9bb17d..c5be5a6cb1 100644
--- a/libavcodec/acelp_filters.h
+++ b/libavcodec/acelp_filters.h
@@ -56,6 +56,14 @@ void ff_acelp_interpolate(int16_t* out, const int16_t* in,
                           int frac_pos, int filter_length, int length);
 
 /**
+ * Floating point version of ff_acelp_interpolate()
+ */
+void ff_acelp_interpolatef(float *out, const float *in,
+                           const float *filter_coeffs, int precision,
+                           int frac_pos, int filter_length, int length);
+
+
+/**
  * high-pass filtering and upscaling (4.2.5 of G.729).
  * @param out [out] output buffer for filtered speech data
  * @param hpf_f [in/out] past filtered data from previous (2 items long)
@@ -97,4 +105,15 @@ void ff_acelp_apply_order_2_transfer_function(float *samples,
                                               float gain,
                                               float mem[2], int n);
 
+/**
+ * Apply tilt compensation filter, 1 - tilt * z-1.
+ *
+ * @param mem pointer to the filter's state (one single float)
+ * @param tilt tilt factor
+ * @param samples array where the filter is applied
+ * @param size the size of the samples array
+ */
+void ff_tilt_compensation(float *mem, float tilt, float *samples, int size);
+
+
 #endif /* AVCODEC_ACELP_FILTERS_H */