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g722: Unroll g722_apply_qmf() 

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Peter Meerwald 2015-02-15 12:21:23 +01:00 committed by Martin Storsjö
parent 10f160768b
commit b16057b5fe
1 changed files with 34 additions and 10 deletions
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44
libavcodec/g722dsp.c
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@ -25,20 +25,44 @@
* quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined * 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 * 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]) static void g722_apply_qmf(const int16_t *prev_samples, int xout[2])
{ {
int i; xout[1] = MUL16(*prev_samples++, 3);
xout[0] = MUL16(*prev_samples++, -11);
xout[0] = 0; MAC16(xout[1], *prev_samples++, -11);
xout[1] = 0; MAC16(xout[0], *prev_samples++, 53);
for (i = 0; i < 12; i++) {
MAC16(xout[1], prev_samples[2*i ], qmf_coeffs[i ]); MAC16(xout[1], *prev_samples++, 12);
MAC16(xout[0], prev_samples[2*i+1], qmf_coeffs[11-i]); 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) av_cold void ff_g722dsp_init(G722DSPContext *c)