diff options
Diffstat (limited to 'libavcodec/sbrdsp.c')
| -rw-r--r-- | libavcodec/sbrdsp.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/libavcodec/sbrdsp.c b/libavcodec/sbrdsp.c index b4d5824e92..e4f053b107 100644 --- a/libavcodec/sbrdsp.c +++ b/libavcodec/sbrdsp.c @@ -110,6 +110,11 @@ static void sbr_qmf_deint_bfly_c(float *v, const float *src0, const float *src1) } } + +#if 0 + /* This code is slower because it multiplies memory accesses. + * It is left for educational purposes and because it may offer + * a better reference for writing arch-specific DSP functions. */ static av_always_inline void autocorrelate(const float x[40][2], float phi[3][2][2], int lag) { @@ -138,14 +143,13 @@ static av_always_inline void autocorrelate(const float x[40][2], static void sbr_autocorrelate_c(const float x[40][2], float phi[3][2][2]) { -#if 0 - /* This code is slower because it multiplies memory accesses. - * It is left for educational purposes and because it may offer - * a better reference for writing arch-specific DSP functions. */ autocorrelate(x, phi, 0); autocorrelate(x, phi, 1); autocorrelate(x, phi, 2); +} #else +static void sbr_autocorrelate_c(const float x[40][2], float phi[3][2][2]) +{ float real_sum2 = x[0][0] * x[2][0] + x[0][1] * x[2][1]; float imag_sum2 = x[0][0] * x[2][1] - x[0][1] * x[2][0]; float real_sum1 = 0.0f, imag_sum1 = 0.0f, real_sum0 = 0.0f; |