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ac3enc: clip coupling coordinates during calculation

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This is faster than using the clip_coefficients() function. Also,
clipping the coordinates before determining reuse is better since it
will compare coordinates that are closer to their final encoded values.
This commit is contained in:
Justin Ruggles 2011-08-07 17:12:49 -04:00
parent d271d5b215
commit 069083a419
1 changed files with 1 additions and 2 deletions
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3
libavcodec/ac3enc_template.c
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@ -126,7 +126,7 @@ static inline float calc_cpl_coord(float energy_ch, float energy_cpl)
float coord = 0.125;
if (energy_cpl > 0)
coord *= sqrtf(energy_ch / energy_cpl);
return coord;
return FFMIN(coord, COEF_MAX);
}
@ -291,7 +291,6 @@ static void apply_channel_coupling(AC3EncodeContext *s)
if (!block->cpl_in_use)
continue;
clip_coefficients(&s->dsp, cpl_coords[blk][1], s->fbw_channels * 16);
s->ac3dsp.float_to_fixed24(fixed_cpl_coords[blk][1],
cpl_coords[blk][1],
s->fbw_channels * 16);