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correction in the 4 subband optimization

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Brad Midgley 2007-11-05 15:54:50 +00:00
parent ec233a1f84
commit 316166212f
1 changed files with 5 additions and 4 deletions
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9
sbc/sbc.c
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@ -713,7 +713,7 @@ static inline void _sbc_analyze_four(const int32_t *in, int32_t *out)
sbc_extended_t res;
sbc_extended_t t[8];
sbc_extended_t s[4];
sbc_extended_t s[5];
MUL(res, _sbc_proto_4[0], (in[8] - in[32])); /* Q18 */
MULA(res, _sbc_proto_4[1], (in[16] - in[24]));
@ -765,13 +765,14 @@ static inline void _sbc_analyze_four(const int32_t *in, int32_t *out)
MUL(s[0], _anamatrix4[0], t[0] + t[4]);
MUL(s[1], _anamatrix4[2], t[2]);
MUL(s[2], _anamatrix4[1], t[1] + t[3]);
MULA(s[2], _anamatrix4[3], t[5] + t[7]);
MULA(s[2], _anamatrix4[3], t[5]);
MUL(s[3], _anamatrix4[3], t[1] + t[3]);
MULA(s[3], _anamatrix4[1], - t[5] + t[7]);
out[0] = SCALE4_STAGE2( s[0] + s[1] + s[2]); /* Q0 */
MUL(s[4], _anamatrix4[3], t[7]);
out[0] = SCALE4_STAGE2( s[0] + s[1] + s[2] + s[4]); /* Q0 */
out[1] = SCALE4_STAGE2(-s[0] + s[1] + s[3]);
out[2] = SCALE4_STAGE2(-s[0] + s[1] - s[3]);
out[3] = SCALE4_STAGE2( s[0] + s[1] - s[2]);
out[3] = SCALE4_STAGE2( s[0] + s[1] - s[2] - s[4]);
}
static inline void sbc_analyze_four(struct sbc_encoder_state *state,