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Code Issues Releases Activity

WMAPRO: use vector_fmul_scalar from dsputil where possible

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Originally committed as revision 20056 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-09-27 08:16:50 +00:00
parent 8b11b44ea7
commit d975e5e9b7
1 changed files with 11 additions and 8 deletions
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19
libavcodec/wmaprodec.c
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@ -981,10 +981,13 @@ static void inverse_channel_transform(WMAProDecodeCtx *s)
}
}
} else if (s->num_channels == 2) {
for (y = sfb[0]; y < FFMIN(sfb[1], s->subframe_len); y++) {
ch_data[0][y] *= 181.0 / 128;
ch_data[1][y] *= 181.0 / 128;
}
int len = FFMIN(sfb[1], s->subframe_len) - sfb[0];
s->dsp.vector_fmul_scalar(ch_data[0] + sfb[0],
ch_data[0] + sfb[0],
181.0 / 128, len);
s->dsp.vector_fmul_scalar(ch_data[1] + sfb[0],
ch_data[1] + sfb[0],
181.0 / 128, len);
}
}
}
@ -1214,10 +1217,10 @@ static int decode_subframe(WMAProDecodeCtx *s)
(s->channel[c].max_scale_factor - *sf++) *
s->channel[c].scale_factor_step;
const float quant = pow(10.0, exp / 20.0);
int start;
for (start = s->cur_sfb_offsets[b]; start < end; start++)
s->tmp[start] = s->channel[c].coeffs[start] * quant;
int start = s->cur_sfb_offsets[b];
s->dsp.vector_fmul_scalar(s->tmp + start,
s->channel[c].coeffs + start,
quant, end - start);
}
/** apply imdct (ff_imdct_half == DCTIV with reverse) */