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N
ffmpeg-0.6.3
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${ noResults }
9 Commits (9200514ad8717c63f82101dc394f4378854325bf)
| Author | SHA1 | Message | Date |
|---|---|---|---|
Janne Grunau
|
d961a79eb0 |
sbrdsp: move #if to disable all educational code
Avoids a warning of the unused function 'autocorrelate'. |
11 years ago |
Christophe Gisquet
|
4a7af92cc8 |
sbrdsp: Unroll and use integer operations
This patch can be controversial, by assuming floats are IEEE-754 and particular behaviour of the FPU will get in the way. Timing on Arrandale and Win32 (thus, x87 FPU is used in the reference). sbr_qmf_pre_shuffle_c: 115 to 76 sbr_neg_odd_64_c: 84 to 55 sbr_qmf_post_shuffle_c: 112 to 83 Signed-off-by: Diego Biurrun <diego@biurrun.de> |
12 years ago |
|
Christophe Gisquet
|
8394d9a676 |
sbrdsp: Unroll sbr_autocorrelate_c
1410 cycles to 1148 on Arrandale/Win64 Signed-off-by: Diego Biurrun <diego@biurrun.de> |
12 years ago |
|
Janne Grunau
|
f101eab1be |
x86: call most of the x86 dsp init functions under if (ARCH_X86)
Rename the called dsp init functions to *_init_x86. |
12 years ago |
|
Christophe GISQUET
|
dabf8dd34a |
SBR DSP: unroll sum_square
The length is even, so some unrolling can be performed. Timings are for x86: - 32bits: 102c -> 82c - 64bits: 82c -> 69c Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com> |
13 years ago |
|
Christophe GISQUET
|
34454c761f |
SBR DSP x86: implement SSE sbr_sum_square_sse
The 32bits targets have been compiled with -mfpmath=sse for proper reference.
sbr_sum_square C /32bits: 82c (unrolled)/102c
C /64bits: 69c (unrolled)/82c
SSE/32bits: 42c
SSE/64bits: 31c
Use of SSE4.1 dpps to perform the final sum is slower.
Not unrolling to perform 8 operations in a loop yields 10 more cycles.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
|
13 years ago |
|
Christophe GISQUET
|
2e74a5abc2 |
SBR DSP: use intptr_t for the ixh parameter.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com> |
13 years ago |
Mans Rullgard
|
be822d77b6 |
aacsbr: ARM NEON optimised sbrdsp functions
Overall speedup of HE-AAC decoding 2.3x on Cortex-A8, 1.2x on A9. Signed-off-by: Mans Rullgard <mans@mansr.com> |
13 years ago |
|
Mans Rullgard
|
aac46e088d |
aacsbr: move some simdable loops to function pointers
This prepares for assembly optimisations by moving the most time-consuming loops to functions called through pointers in a new context. Signed-off-by: Mans Rullgard <mans@mansr.com> |
13 years ago |