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Fixes a minor CELT->SILK switching glitch in the decoder

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By not reinitializing the stereo state during a switch, the old stereo
memory would create a false impulse (i.e. single sample) in the decoded audio.
This change affects the normative part of the decoder. Fortunately,
the modified decoder is still compliant with the specification because
it still easily passes the testvectors. For example, for the float decoder
at 48 kHz, the opus_compare (arbitrary) "quality score" changes from
from 99.9333% to 99.925%.
This commit is contained in:
Jean-Marc Valin 2013-02-06 23:48:09 -05:00
parent 61e9eb15cc
commit e51a3f33cf
1 changed files with 3 additions and 0 deletions
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3
silk/dec_API.c
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@ -69,6 +69,9 @@ opus_int silk_InitDecoder( /* O Returns error co
for( n = 0; n < DECODER_NUM_CHANNELS; n++ ) {
ret = silk_init_decoder( &channel_state[ n ] );
}
silk_memset(&((silk_decoder *)decState)->sStereo, 0, sizeof(((silk_decoder *)decState)->sStereo));
/* Not strictly needed, but it's cleaner that way */
((silk_decoder *)decState)->prev_decode_only_middle = 0;
return ret;
}