diff options
| -rw-r--r-- | libavcodec/g722dsp.c | 46 |
1 files changed, 35 insertions, 11 deletions
diff --git a/libavcodec/g722dsp.c b/libavcodec/g722dsp.c index 5d3aedb737..f28b1a317c 100644 --- a/libavcodec/g722dsp.c +++ b/libavcodec/g722dsp.c @@ -25,20 +25,44 @@ * quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined * in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11 */ -static const int16_t qmf_coeffs[12] = { - 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11, -}; static void g722_apply_qmf(const int16_t *prev_samples, int xout[2]) { - int i; - - xout[0] = 0; - xout[1] = 0; - for (i = 0; i < 12; i++) { - MAC16(xout[1], prev_samples[2*i ], qmf_coeffs[i ]); - MAC16(xout[0], prev_samples[2*i+1], qmf_coeffs[11-i]); - } + xout[1] = MUL16(*prev_samples++, 3); + xout[0] = MUL16(*prev_samples++, -11); + + MAC16(xout[1], *prev_samples++, -11); + MAC16(xout[0], *prev_samples++, 53); + + MAC16(xout[1], *prev_samples++, 12); + MAC16(xout[0], *prev_samples++, -156); + + MAC16(xout[1], *prev_samples++, 32); + MAC16(xout[0], *prev_samples++, 362); + + MAC16(xout[1], *prev_samples++, -210); + MAC16(xout[0], *prev_samples++, -805); + + MAC16(xout[1], *prev_samples++, 951); + MAC16(xout[0], *prev_samples++, 3876); + + MAC16(xout[1], *prev_samples++, 3876); + MAC16(xout[0], *prev_samples++, 951); + + MAC16(xout[1], *prev_samples++, -805); + MAC16(xout[0], *prev_samples++, -210); + + MAC16(xout[1], *prev_samples++, 362); + MAC16(xout[0], *prev_samples++, 32); + + MAC16(xout[1], *prev_samples++, -156); + MAC16(xout[0], *prev_samples++, 12); + + MAC16(xout[1], *prev_samples++, 53); + MAC16(xout[0], *prev_samples++, -11); + + MAC16(xout[1], *prev_samples++, -11); + MAC16(xout[0], *prev_samples++, 3); } av_cold void ff_g722dsp_init(G722DSPContext *c) |