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FFmpeg/libavcodec/arm

History

Ben Avison 42c1cc35b7 armv6: Accelerate ff_imdct_half for general case (mdct_bits != 6) ... The previous implementation targeted DTS Coherent Acoustics, which only requires mdct_bits == 6. This relatively small size lent itself to unrolling the loops a small number of times, and encoding offsets calculated at assembly time within the load/store instructions of each iteration. In the more general case (codecs such as AAC and AC3) much larger arrays are used - mdct_bits == [8, 9, 11]. The old method does not scale for these cases, so more integer registers are used with non-unrolled versions of the loops (and with some stack spillage). The postrotation filter loop is still unrolled by a factor of 2 to permit the double-buffering of some VFP registers to facilitate overlap of neighbouring iterations. I benchmarked the result by measuring the number of gperftools samples that hit anywhere in the AAC decoder (starting from aac_decode_frame()) or specifically in ff_imdct_half_c / ff_imdct_half_vfp, for the same example AAC stream: Before After Mean StdDev Mean StdDev Confidence Change aac_decode_frame 2368.1 35.8 2117.2 35.3 100.0% +11.8% ff_imdct_half_* 457.5 22.4 251.2 16.2 100.0% +82.1% Signed-off-by: Michael Niedermayer <michaelni@gmx.at>		10 years ago
..
Makefile	Merge commit 'f46bb608d9d76c543e4929dc8cffe36b84bd789e'	11 years ago
aac.h	…
aacpsdsp_init_arm.c	Reinstate proper FFmpeg license for all files.	11 years ago
aacpsdsp_neon.S	Reinstate proper FFmpeg license for all files.	11 years ago
ac3dsp_arm.S	Reinstate proper FFmpeg license for all files.	11 years ago
ac3dsp_armv6.S	Reinstate proper FFmpeg license for all files.	11 years ago
ac3dsp_init_arm.c	Merge commit '4958f35a2ebc307049ff2104ffb944f5f457feb3'	11 years ago
ac3dsp_neon.S	Merge commit '4958f35a2ebc307049ff2104ffb944f5f457feb3'	11 years ago
asm-offsets.h	Merge commit '6a13505c069890cb0e2a07e29fd819a0cf2e73c1'	11 years ago
audiodsp_arm.h	Merge commit '9a9e2f1c8aa4539a261625145e5c1f46a8106ac2'	11 years ago
audiodsp_init_arm.c	Merge commit '9a9e2f1c8aa4539a261625145e5c1f46a8106ac2'	11 years ago
audiodsp_init_neon.c	Merge commit '9a9e2f1c8aa4539a261625145e5c1f46a8106ac2'	11 years ago
audiodsp_neon.S	Merge commit '9a9e2f1c8aa4539a261625145e5c1f46a8106ac2'	11 years ago
blockdsp_arm.h	Merge commit 'e74433a8e6fc00c8dbde293c97a3e45384c2c1d9'	11 years ago
blockdsp_init_arm.c	Merge commit 'e74433a8e6fc00c8dbde293c97a3e45384c2c1d9'	11 years ago
blockdsp_init_neon.c	Merge commit 'e74433a8e6fc00c8dbde293c97a3e45384c2c1d9'	11 years ago
blockdsp_neon.S	Merge commit 'e74433a8e6fc00c8dbde293c97a3e45384c2c1d9'	11 years ago
cabac.h	avcodec/arm/cabac: fix inline cabac reader with the UNCHECKED bitstream reader	11 years ago
dca.h	Merge commit '4cb6964244fd6c099383d8b7e99731e72cc844b9'	11 years ago
dcadsp_init_arm.c	Merge commit '6e4009d4cdf5927bdaedf58fcfc5e813b14c366b'	11 years ago
dcadsp_neon.S	Merge commit '6e4009d4cdf5927bdaedf58fcfc5e813b14c366b'	11 years ago
dcadsp_vfp.S	Merge commit '87ec849fe9acba075c843e67bcd01f256f481a18'	11 years ago
dsputil_arm.h	Merge commit '1173320249745eab01c901a39054fc0fced33c87'	11 years ago
dsputil_armv6.S	Merge commit 'f46bb608d9d76c543e4929dc8cffe36b84bd789e'	11 years ago
dsputil_init_arm.c	Merge commit '1173320249745eab01c901a39054fc0fced33c87'	11 years ago
dsputil_init_armv6.c	Merge commit '1173320249745eab01c901a39054fc0fced33c87'	11 years ago
fft_fixed_init_arm.c	Merge commit '794fcf79a89eca2d4e889803b2c804a0b1defbb3'	11 years ago
fft_fixed_neon.S	avcodec/arm/fft_fixed_neon: reduce diff by 2 spaces to libav	11 years ago
fft_init_arm.c	Merge commit 'bd549cbaacd33dfb7be81d0619c9b107b8a85be7'	11 years ago
fft_neon.S	…
fft_vfp.S	Merge commit '8b9eba664edaddf9a304d3acbf0388b5c520781d'	11 years ago
flacdsp_arm.S	…
flacdsp_init_arm.c	lavc: fix flac encoder and decoder dependencies	11 years ago
fmtconvert_init_arm.c	Merge commit 'f0389eb777b1ab4291329d4f709098cdfa7384dc'	11 years ago
fmtconvert_neon.S	Merge commit '5bcbb516f2ff45290ef7995b081762e668693672'	11 years ago
fmtconvert_vfp.S	Merge commit 'f0389eb777b1ab4291329d4f709098cdfa7384dc'	11 years ago
fmtconvert_vfp_armv6.S	Merge commit 'f0389eb777b1ab4291329d4f709098cdfa7384dc'	11 years ago
h264chroma_init_arm.c	…
h264cmc_neon.S	Merge commit 'f23d26a6864128001b03876b0b92fffe131f2060'	11 years ago
h264dsp_init_arm.c	Merge commit '79fce1ec8abd017593c003917fc123f7119a78d6'	11 years ago
h264dsp_neon.S	…
h264idct_neon.S	Merge commit '5bcbb516f2ff45290ef7995b081762e668693672'	11 years ago
h264pred_init_arm.c	Merge commit 'ac4b32df71bd932838043a4838b86d11e169707f'	11 years ago
h264pred_neon.S	…
h264qpel_init_arm.c	…
h264qpel_neon.S	…
hpeldsp_arm.S	Merge commit '831a1180785a786272cdcefb71566a770bfb879e'	11 years ago
hpeldsp_arm.h	Merge commit '7151c5d04aed3b496c21f713dcb603e2cbdb9c49'	11 years ago
hpeldsp_armv6.S	Merge commit '61985ad72c47bbb668f2d3923bf5c9df83e79323'	11 years ago
hpeldsp_init_arm.c	Merge commit '322a1dda973e802db7b57f2007fad3efcd5bab81'	11 years ago
hpeldsp_init_armv6.c	Merge commit '7384b7a71338d960e421d6dc3d77da09b0a442cb'	12 years ago
hpeldsp_init_neon.c	Merge commit '7384b7a71338d960e421d6dc3d77da09b0a442cb'	12 years ago
hpeldsp_neon.S	arm: hpeldsp: Move half-pel assembly from dsputil to hpeldsp	12 years ago
idctdsp_arm.S	Merge commit 'e3fcb14347466095839c2a3c47ebecff02da891e'	11 years ago
idctdsp_arm.h	Merge commit 'e3fcb14347466095839c2a3c47ebecff02da891e'	11 years ago
idctdsp_armv6.S	Merge commit 'e3fcb14347466095839c2a3c47ebecff02da891e'	11 years ago
idctdsp_init_arm.c	Merge commit 'e3fcb14347466095839c2a3c47ebecff02da891e'	11 years ago
idctdsp_init_armv5te.c	Merge commit 'e3fcb14347466095839c2a3c47ebecff02da891e'	11 years ago
idctdsp_init_armv6.c	Merge commit 'e3fcb14347466095839c2a3c47ebecff02da891e'	11 years ago
idctdsp_init_neon.c	Merge commit 'e3fcb14347466095839c2a3c47ebecff02da891e'	11 years ago
idctdsp_neon.S	Merge commit 'e3fcb14347466095839c2a3c47ebecff02da891e'	11 years ago
int_neon.S	Merge commit '054013a0fc6f2b52c60cee3e051be8cc7f82cef3'	11 years ago
jrevdct_arm.S	…
lossless_audiodsp_init_arm.c	apedsp: move to llauddsp	11 years ago
lossless_audiodsp_neon.S	apedsp: move to llauddsp	11 years ago
mathops.h	…
mdct_fixed_neon.S	Reinstate proper FFmpeg license for all files.	11 years ago
mdct_neon.S	Merge commit '5bcbb516f2ff45290ef7995b081762e668693672'	11 years ago
mdct_vfp.S	armv6: Accelerate ff_imdct_half for general case (mdct_bits != 6)	10 years ago
mlpdsp_armv5te.S	truehd: add hand-scheduled ARM asm version of ff_mlp_rematrix_channel.	11 years ago
mlpdsp_armv6.S	Merge remote-tracking branch 'qatar/master'	11 years ago
mlpdsp_init_arm.c	Merge remote-tracking branch 'qatar/master'	11 years ago
mpegaudiodsp_fixed_armv6.S	Reinstate proper FFmpeg license for all files.	11 years ago
mpegaudiodsp_init_arm.c	Reinstate proper FFmpeg license for all files.	11 years ago
mpegvideo_arm.c	Merge commit 'a88e1d1c598e641eecd5d43730211d91c82787c6'	11 years ago
mpegvideo_arm.h	Merge commit '7151c5d04aed3b496c21f713dcb603e2cbdb9c49'	11 years ago
mpegvideo_armv5te.c	…
mpegvideo_armv5te_s.S	…
mpegvideo_neon.S	Merge commit '5bcbb516f2ff45290ef7995b081762e668693672'	11 years ago
mpegvideoencdsp_armv6.S	Merge commit 'c166148409fe8f0dbccef2fe684286a40ba1e37d'	11 years ago
mpegvideoencdsp_init_arm.c	Merge commit 'c166148409fe8f0dbccef2fe684286a40ba1e37d'	11 years ago
neon.S	Reinstate proper FFmpeg license for all files.	11 years ago
neontest.c	Merge remote-tracking branch 'qatar/master'	11 years ago
pixblockdsp_armv6.S	Merge commit 'f46bb608d9d76c543e4929dc8cffe36b84bd789e'	11 years ago
pixblockdsp_init_arm.c	Merge commit 'f46bb608d9d76c543e4929dc8cffe36b84bd789e'	11 years ago
rdft_neon.S	…
rv34dsp_init_arm.c	…
rv34dsp_neon.S	Reinstate proper FFmpeg license for all files.	11 years ago
rv40dsp_init_arm.c	Merge commit '7f75f2f2bd692857c1c1ca7f414eb30ece3de93d'	12 years ago
rv40dsp_neon.S	Reinstate proper FFmpeg license for all files.	11 years ago
sbrdsp_init_arm.c	Reinstate proper FFmpeg license for all files.	11 years ago
sbrdsp_neon.S	Reinstate proper FFmpeg license for all files.	11 years ago
simple_idct_arm.S	Merge commit '2ad4ee345a4216aef3999f57dd14c56128d27a13'	11 years ago
simple_idct_armv5te.S	…
simple_idct_armv6.S	…
simple_idct_neon.S	…
startcode_armv6.S	h264: Move search code search functions into separate source files.	11 years ago
synth_filter_neon.S	…
synth_filter_vfp.S	arm: Mangle external symbols properly in new vfp assembly files	11 years ago
vc1dsp.h	Merge commit '832e19063209a5f355af733d1a45f5051f49ce33'	11 years ago
vc1dsp_init_arm.c	vc-1: Add platform-specific start code search routine to VC1DSPContext.	11 years ago
vc1dsp_init_neon.c	Merge commit '896a5bff64264f4d01ed98eacc97a67260c1e17e'	11 years ago
vc1dsp_neon.S	Merge commit '896a5bff64264f4d01ed98eacc97a67260c1e17e'	11 years ago
videodsp_arm.h	…
videodsp_armv5te.S	Merge commit '831a1180785a786272cdcefb71566a770bfb879e'	11 years ago
videodsp_init_arm.c	…
videodsp_init_armv5te.c	…
vorbisdsp_init_arm.c	…
vorbisdsp_neon.S	…
vp3dsp_init_arm.c	Merge commit '3dc6272bed7890a49080e18eacf3c7a4a6594b0d'	11 years ago
vp3dsp_neon.S	Merge remote-tracking branch 'qatar/master'	11 years ago
vp6dsp_init_arm.c	Merge commit '8506ff97c9ea4a1f52983497ecf8d4ef193403a9'	11 years ago
vp6dsp_neon.S	Merge commit '8506ff97c9ea4a1f52983497ecf8d4ef193403a9'	11 years ago
vp8.h	arm: asm decode_block_coeffs_internal is vp8 specific	11 years ago
vp8_armv6.S	…
vp8dsp.h	Merge commit 'ac4b32df71bd932838043a4838b86d11e169707f'	11 years ago
vp8dsp_armv6.S	Merge commit '5a7f382a5d33d9a26890affe6c8c5070a48dfc22'	11 years ago
vp8dsp_init_arm.c	Merge commit 'ac4b32df71bd932838043a4838b86d11e169707f'	11 years ago
vp8dsp_init_armv6.c	Merge commit 'ac4b32df71bd932838043a4838b86d11e169707f'	11 years ago
vp8dsp_init_neon.c	Merge commit 'ac4b32df71bd932838043a4838b86d11e169707f'	11 years ago
vp8dsp_neon.S	Merge remote-tracking branch 'qatar/master'	11 years ago
vp56_arith.h	…