mirror of https://git.ffmpeg.org/ffmpeg.git
Merge commit 'b16057b5fe9f02442c52388037891c2e381205fc'
* commit 'b16057b5fe9f02442c52388037891c2e381205fc': g722: Unroll g722_apply_qmf() Merged-by: Michael Niedermayer <michaelni@gmx.at>
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commit
9e0a1bd2b9
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@ -25,20 +25,44 @@
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* quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined
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* in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11
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*/
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static const int16_t qmf_coeffs[12] = {
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3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11,
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};
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static void g722_apply_qmf(const int16_t *prev_samples, int xout[2])
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{
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int i;
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xout[1] = MUL16(*prev_samples++, 3);
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xout[0] = MUL16(*prev_samples++, -11);
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xout[0] = 0;
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xout[1] = 0;
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for (i = 0; i < 12; i++) {
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MAC16(xout[1], prev_samples[2*i ], qmf_coeffs[i ]);
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MAC16(xout[0], prev_samples[2*i+1], qmf_coeffs[11-i]);
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}
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MAC16(xout[1], *prev_samples++, -11);
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MAC16(xout[0], *prev_samples++, 53);
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MAC16(xout[1], *prev_samples++, 12);
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MAC16(xout[0], *prev_samples++, -156);
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MAC16(xout[1], *prev_samples++, 32);
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MAC16(xout[0], *prev_samples++, 362);
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MAC16(xout[1], *prev_samples++, -210);
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MAC16(xout[0], *prev_samples++, -805);
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MAC16(xout[1], *prev_samples++, 951);
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MAC16(xout[0], *prev_samples++, 3876);
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MAC16(xout[1], *prev_samples++, 3876);
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MAC16(xout[0], *prev_samples++, 951);
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MAC16(xout[1], *prev_samples++, -805);
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MAC16(xout[0], *prev_samples++, -210);
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MAC16(xout[1], *prev_samples++, 362);
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MAC16(xout[0], *prev_samples++, 32);
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MAC16(xout[1], *prev_samples++, -156);
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MAC16(xout[0], *prev_samples++, 12);
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MAC16(xout[1], *prev_samples++, 53);
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MAC16(xout[0], *prev_samples++, -11);
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MAC16(xout[1], *prev_samples++, -11);
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MAC16(xout[0], *prev_samples++, 3);
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}
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av_cold void ff_g722dsp_init(G722DSPContext *c)
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