diff options
Diffstat (limited to 'sbc/sbc.c')
| -rw-r--r-- | sbc/sbc.c | 23 |
1 files changed, 23 insertions, 0 deletions
@@ -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) |