diff options
| author | Siarhei Siamashka <siarhei.siamashka@nokia.com> | 2011-03-14 15:18:46 -0300 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.dentz-von@nokia.com> | 2011-03-14 15:18:46 -0300 |
| commit | fd7dc68ded44bd307802c24c3d02366984d829a3 (patch) | |
| tree | e420f6969f1519575c72841587372665ab6e3d04 /src/modules/bluetooth/sbc/sbc.c | |
| parent | 1f617ea9ec74956688a30da3901905c9abe34a65 (diff) | |
sbc: ARM NEON optimization for scale factors calculation
Improves SBC encoding performance when joint stereo is not used.
Benchmarked on ARM Cortex-A8:
== Before: ==
$ time ./sbcenc -b53 -s8 test.au > /dev/null
real 0m4.756s
user 0m4.313s
sys 0m0.438s
samples % image name symbol name
2569 27.6296 sbcenc sbc_pack_frame
1934 20.8002 sbcenc sbc_analyze_4b_8s_neon
1386 14.9064 sbcenc sbc_calculate_bits
1221 13.1319 sbcenc sbc_calc_scalefactors
996 10.7120 sbcenc sbc_enc_process_input_8s_be
878 9.4429 no-vmlinux /no-vmlinux
204 2.1940 sbcenc sbc_encode
56 0.6023 libc-2.10.1.so memcpy
== After: ==
$ time ./sbcenc -b53 -s8 test.au > /dev/null
real 0m4.220s
user 0m3.797s
sys 0m0.422s
samples % image name symbol name
2563 31.3249 sbcenc sbc_pack_frame
1892 23.1239 sbcenc sbc_analyze_4b_8s_neon
1368 16.7196 sbcenc sbc_calculate_bits
961 11.7453 sbcenc sbc_enc_process_input_8s_be
836 10.2176 no-vmlinux /no-vmlinux
262 3.2022 sbcenc sbc_calc_scalefactors_neon
199 2.4322 sbcenc sbc_encode
49 0.5989 libc-2.10.1.so memcpy
Diffstat (limited to 'src/modules/bluetooth/sbc/sbc.c')
| -rw-r--r-- | src/modules/bluetooth/sbc/sbc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/modules/bluetooth/sbc/sbc.c b/src/modules/bluetooth/sbc/sbc.c index 512341fa..bebca41e 100644 --- a/src/modules/bluetooth/sbc/sbc.c +++ b/src/modules/bluetooth/sbc/sbc.c @@ -77,7 +77,7 @@ struct sbc_frame { uint8_t joint; /* only the lower 4 bits of every element are to be used */ - uint32_t scale_factor[2][8]; + uint32_t SBC_ALIGNED scale_factor[2][8]; /* raw integer subband samples in the frame */ int32_t SBC_ALIGNED sb_sample_f[16][2][8]; |