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| author | Michael Niedermayer <michaelni@gmx.at> | 2015-02-16 02:00:49 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-02-16 02:00:53 +0100 |
| commit | 9e0a1bd2b977e69638a691e4ff4c9ceb21d45c33 (patch) | |
| tree | 519c18dcba9a08cbde7b6da7668d4e1a1b340803 /libavcodec/g722dsp.c | |
| parent | 9f1792982eb69782fa6d1ff0ab5d11d21bd451df (diff) | |
| parent | b16057b5fe9f02442c52388037891c2e381205fc (diff) | |
| download | ffmpeg-9e0a1bd2b977e69638a691e4ff4c9ceb21d45c33.tar.gz | |
Merge commit 'b16057b5fe9f02442c52388037891c2e381205fc'
* commit 'b16057b5fe9f02442c52388037891c2e381205fc':
g722: Unroll g722_apply_qmf()
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/g722dsp.c')
| -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 8d6c721c7e..0416d22ea3 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) |