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aacsbr: Eliminate double precision arithmetic.

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Originally committed as revision 24227 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Converse 2010-07-13 00:49:30 +00:00
parent 1ac6da3988
commit afa4248e4e
1 changed files with 2 additions and 2 deletions
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4
libavcodec/aacsbr.c
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@ -1580,7 +1580,7 @@ static void sbr_gain_calc(AACContext *ac, SpectralBandReplication *sbr,
sum[1] += sbr->e_curr[e][m]; sum[1] += sbr->e_curr[e][m];
} }
gain_max = limgain[sbr->bs_limiter_gains] * sqrtf((FLT_EPSILON + sum[0]) / (FLT_EPSILON + sum[1])); gain_max = limgain[sbr->bs_limiter_gains] * sqrtf((FLT_EPSILON + sum[0]) / (FLT_EPSILON + sum[1]));
gain_max = FFMIN(100000, gain_max); gain_max = FFMIN(100000.f, gain_max);
for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
float q_m_max = sbr->q_m[e][m] * gain_max / sbr->gain[e][m]; float q_m_max = sbr->q_m[e][m] * gain_max / sbr->gain[e][m];
sbr->q_m[e][m] = FFMIN(sbr->q_m[e][m], q_m_max); sbr->q_m[e][m] = FFMIN(sbr->q_m[e][m], q_m_max);
@ -1594,7 +1594,7 @@ static void sbr_gain_calc(AACContext *ac, SpectralBandReplication *sbr,
+ (delta && !sbr->s_m[e][m]) * sbr->q_m[e][m] * sbr->q_m[e][m]; + (delta && !sbr->s_m[e][m]) * sbr->q_m[e][m] * sbr->q_m[e][m];
} }
gain_boost = sqrtf((FLT_EPSILON + sum[0]) / (FLT_EPSILON + sum[1])); gain_boost = sqrtf((FLT_EPSILON + sum[0]) / (FLT_EPSILON + sum[1]));
gain_boost = FFMIN(1.584893192, gain_boost); gain_boost = FFMIN(1.584893192f, gain_boost);
for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
sbr->gain[e][m] *= gain_boost; sbr->gain[e][m] *= gain_boost;
sbr->q_m[e][m] *= gain_boost; sbr->q_m[e][m] *= gain_boost;