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AAC SBR: use AVFloatDSPContext's vector_fmul 

Around 5% speedup on the code block using 'vector_fmul_add's.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Christophe Gisquet 2012-11-30 21:49:33 +01:00 committed by Diego Biurrun
parent 33086f9265
commit 9a16359c38
1 changed files with 6 additions and 5 deletions
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11
libavcodec/aacsbr.c
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@ -74,7 +74,6 @@ enum {
static VLC vlc_sbr[10];
static const int8_t vlc_sbr_lav[10] =
{ 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 };
static const DECLARE_ALIGNED(16, float, zero64)[64];
#define SBR_INIT_VLC_STATIC(num, size) \
INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size, \
@ -1174,7 +1173,7 @@ static void sbr_qmf_analysis(DSPContext *dsp, FFTContext *mdct,
* (14496-3 sp04 p206)
*/
static void sbr_qmf_synthesis(DSPContext *dsp, FFTContext *mdct,
SBRDSPContext *sbrdsp,
SBRDSPContext *sbrdsp, AVFloatDSPContext *fdsp,
float *out, float X[2][38][64],
float mdct_buf[2][64],
float *v0, int *v_off, const unsigned int div)
@ -1205,7 +1204,7 @@ static void sbr_qmf_synthesis(DSPContext *dsp, FFTContext *mdct,
mdct->imdct_half(mdct, mdct_buf[1], X[1][i]);
sbrdsp->qmf_deint_bfly(v, mdct_buf[1], mdct_buf[0]);
}
dsp->vector_fmul_add(out, v , sbr_qmf_window , zero64, 64 >> div);
fdsp->vector_fmul (out, v , sbr_qmf_window , 64 >> div);
dsp->vector_fmul_add(out, v + ( 192 >> div), sbr_qmf_window + ( 64 >> div), out , 64 >> div);
dsp->vector_fmul_add(out, v + ( 256 >> div), sbr_qmf_window + (128 >> div), out , 64 >> div);
dsp->vector_fmul_add(out, v + ( 448 >> div), sbr_qmf_window + (192 >> div), out , 64 >> div);
@ -1703,12 +1702,14 @@ void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac,
nch = 2;
}
sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, &sbr->dsp, L, sbr->X[0], sbr->qmf_filter_scratch,
sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, &sbr->dsp, &ac->fdsp,
L, sbr->X[0], sbr->qmf_filter_scratch,
sbr->data[0].synthesis_filterbank_samples,
&sbr->data[0].synthesis_filterbank_samples_offset,
downsampled);
if (nch == 2)
sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, &sbr->dsp, R, sbr->X[1], sbr->qmf_filter_scratch,
sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, &sbr->dsp, &ac->fdsp,
R, sbr->X[1], sbr->qmf_filter_scratch,
sbr->data[1].synthesis_filterbank_samples,
&sbr->data[1].synthesis_filterbank_samples_offset,
downsampled);