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path: root/src/modules/bluetooth/sbc/sbc_primitives.c
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* bluetooth: Run 'make update-sbc'Colin Guthrie2011-03-201-1/+2
| | | | Note that changes to ipc.h from 8f3ef04b had to be manually reapplied.
* sbc: add iwmmxt optimization for sbc for pxa series cpuSiarhei Siamashka2011-03-141-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Benchmarked on ARM PXA platform: === Before (4 bands) ==== $ time ./sbcenc_orig -s 4 long.au > /dev/null real 0m 2.44s user 0m 2.39s sys 0m 0.05s === After (4 bands) ==== $ time ./sbcenc -s 4 long.au > /dev/null real 0m 1.59s user 0m 1.49s sys 0m 0.10s === Before (8 bands) ==== $ time ./sbcenc_orig -s 8 long.au > /dev/null real 0m 4.05s user 0m 3.98s sys 0m 0.07s === After (8 bands) ==== $ time ./sbcenc -s 8 long.au > /dev/null real 0m 1.48s user 0m 1.41s sys 0m 0.06s === Before (a2dp usage) ==== $ time ./sbcenc_orig -b53 -s8 -j long.au > /dev/null real 0m 4.51s user 0m 4.41s sys 0m 0.10s === After (a2dp usage) ==== $ time ./sbcenc -b53 -s8 -j long.au > /dev/null real 0m 2.05s user 0m 1.99s sys 0m 0.06s
* sbc: ARMv6 optimized version of analysis filter for SBC encoderSiarhei Siamashka2011-03-141-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
* sbc: new 'sbc_calc_scalefactors_j' function added to sbc primitivesSiarhei Siamashka2011-03-141-0/+75
| | | | | | | | | | | | | | | | | | | | | | | | | | The code for scale factors calculation with joint stereo support has been moved to a separate function. It can get platform-specific SIMD optimizations later for best possible performance. But even this change in C code improves performance because of the use of __builtin_clz() instead of loops similar to what was done to sbc_calc_scalefactors earlier. Also technically it does loop unrolling by processing two channels at once, which might be either good or bad for performance (if the registers pressure is increased and more data is spilled to memory). But the benchmark from 32-bit x86 system (pentium-m) shows that it got clearly faster: $ time ./sbcenc.old -b53 -s8 -j test.au > /dev/null real 0m1.868s user 0m1.808s sys 0m0.048s $ time ./sbcenc.new -b53 -s8 -j test.au > /dev/null real 0m1.742s user 0m1.668s sys 0m0.064s
* sbc: ensure 16-byte buffer position alignment for 4 subbands encodingSiarhei Siamashka2011-03-141-3/+3
| | | | | | | Buffer position in X array was not always 16-bytes aligned. Strict 16-byte alignment is strictly required for powerpc altivec simd optimizations because altivec does not have support for unaligned vector loads at all.
* build: move sbc related files to its own directoryLuiz Augusto von Dentz2011-03-141-0/+470
This should make it easier to apply patches from BlueZ which also uses sbc subdir for this files.
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