Krzysztof Pyrkosz 83e4b068d9 avcodec/aarch64/aacencdsp: NEON implementation ...

This patch supplies handwritten NEON code for AAC.

The benchmarks below were collected by invoking these two commands on
each of my boards, A78, A72 and Thinkpad x13s:
1) ./tests/checkasm/checkasm --test=aacencdsp --bench --runs=12
2) ./ffmpeg -y -t 10:00 -f lavfi -i sine /tmp/foo.aac (the first line is
speed without the patch, second, with)

- A78
abs_pow34_c:                                          4161.5 ( 1.00x)
abs_pow34_neon:                                       3586.2 ( 1.16x)
quant_bands_signed_c:                                 5548.0 ( 1.00x)
quant_bands_signed_neon:                              1126.8 ( 4.92x)
quant_bands_unsigned_c:                               3979.2 ( 1.00x)
quant_bands_unsigned_neon:                             800.2 ( 4.97x)

size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed=71.6x
size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed=82.3x

- A72
abs_pow34_c:                                         15362.2 ( 1.00x)
abs_pow34_neon:                                      15382.5 ( 1.00x)
quant_bands_signed_c:                                 9926.5 ( 1.00x)
quant_bands_signed_neon:                              2467.8 ( 4.02x)
quant_bands_unsigned_c:                               5469.8 ( 1.00x)
quant_bands_unsigned_neon:                            2089.5 ( 2.62x)

size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed=34.3x
size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed=37.8

- x13s
abs_pow34_c:                                          2413.4 ( 1.00x)
abs_pow34_neon:                                       1796.2 ( 1.34x)
quant_bands_signed_c:                                 2968.9 ( 1.00x)
quant_bands_signed_neon:                               675.6 ( 4.39x)
quant_bands_unsigned_c:                               2311.9 ( 1.00x)
quant_bands_unsigned_neon:                             477.1 ( 4.85x)

size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed= 135x
size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed= 159x

Signed-off-by: Martin Storsjö <martin@martin.st>

2025-01-28 10:44:40 +02:00

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