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sbc: ARMv6 optimized version of analysis filter for SBC encoder

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The optimized filter gets enabled when the code is compiled
with -mcpu=/-march options set to target the processors which
support ARMv6 instructions. This code is also disabled when
NEON is used (which is a lot better alternative). For additional
safety ARM EABI is required and thumb mode should not be used.

Benchmarks from ARM11:

== 8 subbands ==

$ time ./sbcenc -b53 -s8 -j test.au > /dev/null

real    0m 35.65s
user    0m 34.17s
sys     0m 1.28s

$ time ./sbcenc.armv6 -b53 -s8 -j test.au > /dev/null

real    0m 17.29s
user    0m 15.47s
sys     0m 0.67s

== 4 subbands ==

$ time ./sbcenc -b53 -s4 -j test.au > /dev/null

real    0m 25.28s
user    0m 23.76s
sys     0m 1.32s

$ time ./sbcenc.armv6 -b53 -s4 -j test.au > /dev/null

real    0m 18.64s
user    0m 15.78s
sys     0m 2.22s
This commit is contained in:
Siarhei Siamashka 2011-03-14 15:35:03 -03:00 • committed by Luiz Augusto von Dentz
parent 51d5f3c9fd
commit 82ef8346d8
4 changed files with 356 additions and 1 deletions
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4
src/modules/bluetooth/sbc/sbc_primitives.c
View file

@ -33,6 +33,7 @@
#include "sbc_primitives.h"
#include "sbc_primitives_mmx.h"
#include "sbc_primitives_neon.h"
#include "sbc_primitives_armv6.h"
/*
* A reference C code of analysis filter with SIMD-friendly tables
@ -539,6 +540,9 @@ void sbc_init_primitives(struct sbc_encoder_state *state)
#endif
/* ARM optimizations */
#ifdef SBC_BUILD_WITH_ARMV6_SUPPORT
sbc_init_primitives_armv6(state);
#endif
#ifdef SBC_BUILD_WITH_NEON_SUPPORT
sbc_init_primitives_neon(state);
#endif