Opened 17 years ago

Closed 16 years ago

#5964 closed patch (fixed)

SRC update

Reported by: foobum@… Owned by: JYA
Priority: minor Milestone: unknown
Component: MythTV - Audio Output Version: head
Severity: low Keywords: SRC libmythsamplerate
Cc: Ticket locked: no

Description

Updates libmythsamplerate to latest upstream version. Big diff - new coefficients. Much improved SNRs. Also, in separate diff, SSE2 opts for ia32 (gcc -O3 wins on amd64).

Attachments (1)

src-sse2.patch​ (20.6 KB ) - added by foobum@… 17 years ago.

Download all attachments as: .zip

Change History (9)

by foobum@…, 17 years ago

Attachment: src-sse2.patch​ added

comment:1 by foobum@…, 17 years ago

SRC update patch was far too large to upload. Can be found here ​http://www.megaupload.com/?d=QCDM8SIG

comment:2 by foobum@…, 17 years ago

Ignore the sse opts patch for now - much improved version on the way.

comment:3 by danielk, 17 years ago

Resolution: → invalid
Status: new → closed

closing at submitter's request ('much improved version on the way.')

comment:4 by foobum@…, 17 years ago

The SRC update patch (at the megaupload link) can be applied. I've given up on the SSE (the attached patch) for now - decided the performance increase isn't enough to justify further work on it at the moment. May try again in future.

comment:5 by danielk, 17 years ago

Resolution: invalid
Status: closed → new
Version: unknown → head

Reopened at submitter's request, "much improved version" didn't work out. Submitter suggests applying #5900 first.

comment:6 by foobum@…, 17 years ago

​http://www.megaupload.com/?d=FG4O5HTR - new patch syncs against latest version of libsamplerate. SNR, performance improvements and a few small modifications related to old clipping issues. Patch is huge because it replaces SINC coefficients.

Reason for applying #5900 first is that SRC is never used in unpatched tree - conversion (grotty linear interpolation) will therefore be performed by ALSA assuming an appropriate (plugged) output device is configured. The SINC based converters in libmythsamplerate (updated here, enabled and fixed in #5900) are a vast improvement.

comment:7 by stuartm, 16 years ago

Component: mythtv → MythTV - Audio Output
Owner: changed from Isaac Richards to JYA
Status: new → assigned

comment:8 by JYA, 16 years ago

Resolution: → fixed
Status: assigned → closed

Updated libsamplerate to 0.1.7 in [22521].

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