Does this give any speed improvement? It is beginning to get
rather complicated for what I'm guessing is very little gain?
I did add your code for adj43asm, which lead me to the following:
Since ix <= 8191+15 = 8206,
pow43, adj43 and adj43asm need to be dimensioned
from 0..8206, so PRECALC_SIZE should be 8207, not 8206?
Mark
> From: Mathew Hendry <[EMAIL PROTECTED]>
> Date: Wed, 8 Dec 1999 16:19:06 -0000
>
> In quantize-pvt.c I've also adjusted iteration_init to use the pow43 lookup
> table to generate adj43asm. Should be a bit faster, and fixes a bug which
> would leave the last entry in the array uninitialised.
>
> diff -r1.11 quantize-pvt.c
> 133,137c133,135
> <
> < adj43asm[0]=0.0;
> < for (i = 1; i < PRECALC_SIZE - 1; i++)
> < adj43asm[i] = i -.5 - pow(0.5 * (pow((double)(i - 1), 4.0/3.0)
> < + pow((double)i,4.0/3.0)), 0.75);
> ---
> > adj43asm[0] = 0.0;
> > for (i = 1; i < PRECALC_SIZE; i++)
> > adj43asm[i] = i - 0.5 - pow(0.5 * (pow43[i - 1] + pow43[i]),
> 0.75);
> 376a375
> > FLOAT8 xrp_max;
> 378a378,390
> >
> > if (highq) {
> > int i;
> > const FLOAT8 *xrp = xrpow;
> > xrp_max = 0;
> > for (i = 576 / 4; i > 0; --i, xrp += 4) {
> > if (xrp[0] > xrp_max) xrp_max = xrp[0];
> > if (xrp[1] > xrp_max) xrp_max = xrp[1];
> > if (xrp[2] > xrp_max) xrp_max = xrp[2];
> > if (xrp[3] > xrp_max) xrp_max = xrp[3];
> > }
> > }
> >
> 381,382c393,398
> < cod_info->quantizerStepSize += 1.0;
> < bits = count_bits(l3_enc[gr][ch], xrpow, cod_info);
> ---
> > cod_info->quantizerStepSize += 1.0;
> > if (highq && xrp_max * pow(2.0, cod_info->quantizerStepSize *
> -0.1875) >= PRECALC_SIZE - 0.5) {
> > bits = 100000;
> > } else {
> > bits = count_bits(l3_enc[gr][ch], xrpow, cod_info);
> > }
> 982a999,1012
> > FLOAT8 xrp_max;
> >
> > if (highq) {
> > int i;
> > const FLOAT8 *xrp = xrspow;
> > xrp_max = 0;
> > for (i = 576 / 4; i > 0; --i, xrp += 4) {
> > if (xrp[0] > xrp_max) xrp_max = xrp[0];
> > if (xrp[1] > xrp_max) xrp_max = xrp[1];
> > if (xrp[2] > xrp_max) xrp_max = xrp[2];
> > if (xrp[3] > xrp_max) xrp_max = xrp[3];
> > }
> > }
> >
> 986c1016,1020
> < nBits = count_bits(ix, xrspow, cod_info);
> ---
> > if (highq && xrp_max * pow(2.0, cod_info->quantizerStepSize *
> -0.1875) >= PRECALC_SIZE - 0.5) {
> > nBits = 100000;
> > } else {
> > nBits = count_bits(ix, xrspow, cod_info);
> > }
>
> diff -r1.3 takehiro.c
> 549a550,551
> >
> > /*
> 556a559,560
> > */
> >
>
> -- Mat.
> --
> MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
>
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