ffmpeg | branch: master | Peter Meerwald <pme...@pmeerw.net> | Sun Feb 15 12:21:23 2015 +0100| [b16057b5fe9f02442c52388037891c2e381205fc] | committer: Martin Storsjö
g722: Unroll g722_apply_qmf() Signed-off-by: Peter Meerwald <pme...@pmeerw.net> Signed-off-by: Martin Storsjö <mar...@martin.st> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b16057b5fe9f02442c52388037891c2e381205fc --- libavcodec/g722dsp.c | 46 +++++++++++++++++++++++++++++++++++----------- 1 file changed, 35 insertions(+), 11 deletions(-) diff --git a/libavcodec/g722dsp.c b/libavcodec/g722dsp.c index 5d3aedb..f28b1a3 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) _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
