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optimizations for 2nd stage of 4-subband encoder

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disabled but in place so indt folks don't duplicate the optimization effort
This commit is contained in:
Brad Midgley 2007-10-04 05:15:07 +00:00
parent 70f0f80c49
commit c434c0b495
1 changed files with 23 additions and 0 deletions
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23
sbc/sbc.c
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@ -701,6 +701,10 @@ static inline void _sbc_analyze_four(const int32_t *in, int32_t *out)
sbc_extended_t res;
sbc_extended_t t[8];
#if 0
/* temporary results */
sbc_extended_t s[2], p[6], d[4];
#endif
out[0] = out[1] = out[2] = out[3] = 0;
MUL(res, _sbc_proto_4[0], (in[8] - in[32])); // Q18
@ -755,6 +759,7 @@ static inline void _sbc_analyze_four(const int32_t *in, int32_t *out)
MULA(res, _sbc_proto_4[2], in[39]);
t[7] = SCALE4_STAGE1(res);
#if 1
MUL(res, _anamatrix4[0], t[0]);
MULA(res, _anamatrix4[1], t[1]);
MULA(res, _anamatrix4[2], t[2]);
@ -791,6 +796,24 @@ static inline void _sbc_analyze_four(const int32_t *in, int32_t *out)
MULA(res, -_anamatrix4[3], t[5]);
MULA(res, _anamatrix4[3], t[7]);
out[3] = SCALE4_STAGE2(res);
#else
s[0] = t[1] + t[3];
s[1] = t[5] - t[6];
MUL(p[0], _anamatrix4[0], t[0] + t[4]);
MUL(p[1], _anamatrix4[1], s[0]);
MUL(p[2], _anamatrix4[2], t[2]);
MUL(p[3], _anamatrix4[3], s[0]);
MUL(p[4], _anamatrix4[3], s[1]);
MUL(p[5], _anamatrix4[1], s[1]);
d[0] = p[0] + p[2];
d[1] = p[2] - p[0];
d[2] = p[1] + p[4];
d[3] = p[3] - p[5];
out[0] = SCALE4_STAGE2(d[0] + d[2]);
out[1] = SCALE4_STAGE2(d[1] + d[3]);
out[2] = SCALE4_STAGE2(d[1] - d[3]);
out[3] = SCALE4_STAGE2(d[0] - d[2]);
#endif
}
static inline void sbc_analyze_four(struct sbc_encoder_state *state,
struct sbc_frame *frame, int ch, int blk)