diff options
Diffstat (limited to 'libavcodec/celp_filters.c')
-rw-r--r-- | libavcodec/celp_filters.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/libavcodec/celp_filters.c b/libavcodec/celp_filters.c index 2a6b0670b4..b2094a164a 100644 --- a/libavcodec/celp_filters.c +++ b/libavcodec/celp_filters.c @@ -103,3 +103,23 @@ void ff_celp_lp_synthesis_filterf( out[n] -= filter_coeffs[i-1] * out[n-i]; } } + +void ff_celp_lp_zero_synthesis_filterf( + float *out, + const float* filter_coeffs, + const float* in, + int buffer_length, + int filter_length) +{ + int i,n; + + // Avoids a +1 in the inner loop. + filter_length++; + + for(n=0; n<buffer_length; n++) + { + out[n] = in[n]; + for(i=1; i<filter_length; i++) + out[n] -= filter_coeffs[i-1] * in[n-i]; + } +} |