1305826 - mono mp3 plays garbled with pops and distorting...

Status: VERIFIED FIXED

(Core :: Audio/Video: Playback, defect)

Description

[Bill]

User Agent: Mozilla/5.0 (Windows NT 5.1; rv:49.0) Gecko/20100101 Firefox/49.0
Build ID: 20160922113459

Steps to reproduce:

running XP SP3 Pro, and Firefox 39.0.1 even refreshed, go to church web site to listen to 44,100 mp3 file containing sermon. 


Actual results:

The audio is rendered garbled with pops and distortion


Expected results:

Clear audio reproduction... which can be obtained with another browser (Chrome)

Comment 1

[Bill]

This problem is a recent occurrence... have been accessing this site for some time... mp3 files have always been created with "Audacity" and it's mp3 accessory ... no changes have been made on this end... problem occurs on at least two computers.... billl

Comment 2

[Loic]

Could you attach such a MP3 audio file or provide a link to the website with these MP3s?

Comment 3

[Bill]

Hi, Loic... the link to the particular (among others) mp3 in question is
http://reformationnalcnc.org/images/20160925ee_Mini.mp3
'not sure sending you the file would help... thanks for picking it up...   Billl

Comment 4

[Loic]

WFM with ff49 on win 7. Maybe an issue only on Win xp.

Comment 5

[Bill]

That's interesting !!... as I mentioned, that same file rendered clear and crisp using "Chrome"... forgive my foul language ;-(

Comment 6

[Bill]

P,S.   I'm waiting for another operating system as reliable as XP...;-)

Comment 7

[Loic]

(In reply to Bill from comment #6)
> P,S.   I'm waiting for another operating system as reliable as XP...;-)

Yeah, FF52 will be the last version to support XP/Vista.

Comment 8

[Bill]

That's interesting, again.... this version (unless I didn't see and update) has been working find for me up until a couple weeks ago (???)... can I just regress out of FF9 or ??

Comment 9

[Loic]

Do you mean the MP3 was played fine with FF48?

Comment 10

[Bill]

Yes. The MP# was playing fine up until a week or so ago...

Comment 11

[Loic]

(In reply to Bill from comment #10)
> Yes. The MP# was playing fine up until a week or so ago...

So maybe there is a regression in FF49.
Could you download the tool Mozregression to narrow down a regression range in FF49, please.
See http://mozilla.github.io/mozregression/ for details.
Run the command mozregression --good=48 then copy here the final pushlog from the repository mozilla-inbound.
Each time a build is downloaded, you play the MP3 to know if the build is good or bad.

Comment 12

[Bill]

Excellent! Will do as you recommend...Bill

Comment 13

[Bill]

Do you recommend GUI of command line??

Comment 14

[Loic]

I use the command line because it's old-fashioned like a standard shell but you need to install python 2.7 in that case.
IMHO, the GUI version is enough for your case, especially with a simple test like reading a MP3.

Comment 15

[Bill]

Thanks...

Comment 16

[Bill]

Sorry, it's not obvious to me where to enter "mozregression --good=48" in the GUI display....

Comment 17

[Loic]

Browse the menu entries of the GUI, you should see an entry to define start/release date.

Comment 18

[Bill]

only options I see are "Run a  single build" or "Run a new bisection"

Comment 19

[Loic]

Select "Run a new bisection".

Comment 20

[Bill]

I'm sorry, there are clearly more parameters than I know what or where to put....

Comment 21

[Loic]

You have to run a bisection, just put a good start date (48 is fine so use this start date).

Comment 22

[Bill]

When I enter last known good build 48, the program crashed........

Comment 23

[Bill]

(In reply to Loic from comment #21)
> You have to run a bisection, just put a good start date (48 is fine so use
> this start date).

Forgive my ignorance but, where does that number go... I tried entering it into "last known good build" with today's date in the other field and GUI didn't like it....

Comment 24

[Loic]

Last good build is 48 or older, because the issue was not present in these releases.

Comment 25

[Bill]

Is there an easy way for me to regress to 48? choices in the GUI are too numerous to guess at.....

Comment 26

[Bill]

hang loose... I just left the 'dates' in the good and current and it might be working ... have downloaded the 3/30/2016 build and will try using it...

Comment 27

[Bill]

I get "One and Done" and can't figure out what to do with it.....:-(

Comment 28

[Loic]

The bisection works by dichotomy. After the start and end builds have been verified as good and bad, the tool downloads builds. For each build, you need to test and enters if it is good or bad.

Comment 29

[Bill]

EUREKA !!!... i WENT TO MY SITE WITH THE MP3 FILE AND IT PLAYED PERFECTLY !!  WHAT DO I HAVE TO DO NOW??

Comment 30

[Loic]

So select "Run a new bisection" and enter 3/30/2016 as start date. The GUI will redownload it and run the regression search.

Comment 31

[Bill]

0422 was good, but 0504 failed... it found 0428, but I don't get a test page??

Comment 32

[Loic]

You can enter "skip" or "retry" if the build doesn't start or crash or if you close it accidentally.

Comment 33

[Bill]

good, except there is no "good | Bad | other| on that line... can I start at 0504 and regress from there?

Comment 34

[Loic]

Yeah, you can even start from 2009. :)
You can even specify an interval, like good=0422  bad=0504.

Comment 35

[Bill]

It looks like 0425 is the last one that works... should I continue with the "inbounds"??

Comment 36

[Loic]

Yes, and after the run, copy here the pushlog from the GUI output.

Comment 37

[Bill]

Now What??

2016-09-29T15:22:58: INFO : Narrowed inbound regression window from [bc717d40, 0c4758a0] (3 revisions) to [bc717d40, 92d6662b] (2 revisions) (~1 steps left)
2016-09-29T15:22:58: DEBUG : Starting merge handling...
2016-09-29T15:22:58: DEBUG : Using url: https://hg.mozilla.org/integration/mozilla-inbound/json-pushes?changeset=92d6662bdf4ffb3ba702c8b4bfa55bbdeab9df91&full=1
2016-09-29T15:22:59: DEBUG : Found commit message:
Bug 1264199: P10. renable test now that core issue likely fixed. r=gerald

Reversal of change from bug 1258922.

2016-09-29T15:22:59: INFO : The bisection is done.
2016-09-29T15:22:59: INFO : Stopped

Comment 38

[Loic]

Jean-Yves, could you check this regression.

Comment 39

[Bill]

Loic, Do you need any more of this gui regression log ??   Bill

Comment 40

[Liz Henry (:lizzard)]

Too late for a fix for 49.

Comment 41

[Bill]

Hi Liz !.... so, when is 50 scheduled... I've been a faithful FF user for a long time and would like to continue...;-)... Billl

Comment 42

[Jean-Yves Avenard [:jya]]

(In reply to Bill from comment #41)
> Hi Liz !.... so, when is 50 scheduled... I've been a faithful FF user for a
> long time and would like to continue...;-)... Billl

If you want to continue using Windows XP, then your choices are rather limited :)

I'll have a look.
Windwows XP MP3 playback code is different to all other platforms.. which doesn't make easy to debug nor access this platform.

Comment 43

[Bill]

...I thougth Loic and I just 'regressed' and identified the "Fix" that caused my problem in 49... Do you mean that the next release will likely cause more problems?.... Billl

Comment 44

[Loic]

(In reply to Bill from comment #43)
> ...I thougth Loic and I just 'regressed' and identified the "Fix" that
> caused my problem in 49... Do you mean that the next release will likely
> cause more problems?.... Billl

The issue is Win XP is a dead OS with many issues about playing media due to outdated APIs. Fixing bugs on this OS is a loss of time for Mozilla devs. You need to know FF52 will be the last version of Firefox to support XP (and Vista).

Comment 45

[Jean-Yves Avenard [:jya]]

(In reply to Bill from comment #43)
> ...I thougth Loic and I just 'regressed' and identified the "Fix" that
> caused my problem in 49... Do you mean that the next release will likely
> cause more problems?.... Billl

The problem will be fixed before 50 make it to release. Be certain of that.

Can you provide a copy of your about:support output and attach a copy of the file giving your problem?

You mentioned in the description that you are using Firefox 39. Wanted to make sure this isn't a typo.

Comment 46

[Bill]

Thanks for the prompt reply... First of all, Yes it is indeed a typo.. I'm running FF 49.0.1
And , yes I will provide about:support as soon as I figure out how to accomplish it... and the problem is a link to an MP3 file - http://reformationnalcnc.org/images/20160925ee_Mini.mp3 which is one of a the recordings I make of our Pastor's sermon... other sample files can be found at http://reformationnalcnc.org/lessonssermons.html ... stay tuned... Billl

Comment 47

[Bill]

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Comment 48

[Jean-Yves Avenard [:jya]]

can reproduce.. thank you for your report..

Comment 49

[Jean-Yves Avenard [:jya]]

For the time being you can get around the problem by doing the following.

in a new tap, enter the url: about:config
In the bottom pane, right click and select New->Boolean

You'll be prompted to "Enter the preference name", there type: media.forcestereo.enabled
In the value there, select "false"

No where your MP3 is, press refresh to reload the file.

File will now play fine.

Comment 50

[Bill]

Thank you, Jean-Yves ! and bless you all....bill !!!

Comment 51

[Jean-Yves Avenard [:jya]]

Attachment: Bug 1305826: P1. Fix move constructor.

With a const input, the object would never be moved but copied instead

Review commit: https://reviewboard.mozilla.org/r/82550/diff/#index_header
See other reviews: https://reviewboard.mozilla.org/r/82550/

Comment 52

[Jean-Yves Avenard [:jya]]

Attachment: Bug 1305826: P2. Ensure the buffer size is of the right size.

The AudioSink uses the size of the buffer to determine the number of frames present. We must ensure that the size of the buffer matches the mFrames member.

Review commit: https://reviewboard.mozilla.org/r/82552/diff/#index_header
See other reviews: https://reviewboard.mozilla.org/r/82552/

Comment 53

[Jean-Yves Avenard [:jya]]

Attachment: Bug 1305826: P3. Only process the number of frames, do not rely on allocated size.

This is only for safeguarding, in case an audio buffer was over allocated. There should be none. But better be safe than sorry

Review commit: https://reviewboard.mozilla.org/r/82554/diff/#index_header
See other reviews: https://reviewboard.mozilla.org/r/82554/

Comment 54

[Gerald Squelart (he/him) (not at Mozilla since 2022-09-15)]

Comment on attachment 8796818 [details]
Bug 1305826: P1. Fix move constructor.

https://reviewboard.mozilla.org/r/82550/#review81128

Comment 55

[Gerald Squelart (he/him) (not at Mozilla since 2022-09-15)]

Comment on attachment 8796819 [details]
Bug 1305826: P2. Ensure the buffer size is of the right size.

https://reviewboard.mozilla.org/r/82552/#review81130

Comment 56

[Gerald Squelart (he/him) (not at Mozilla since 2022-09-15)]

Comment on attachment 8796820 [details]
Bug 1305826: P3. Only process the number of frames, do not rely on allocated size.

https://reviewboard.mozilla.org/r/82554/#review81132

Comment 57

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/9f9aa517e499
P1. Fix move constructor. r=gerald
https://hg.mozilla.org/integration/autoland/rev/66fc89b8e43a
P2. Ensure the buffer size is of the right size. r=gerald
https://hg.mozilla.org/integration/autoland/rev/7a131d2860bd
P3. Only process the number of frames, do not rely on allocated size. r=gerald

Comment 58

[Phil Ringnalda (:philor)]

https://hg.mozilla.org/mozilla-central/rev/9f9aa517e499
https://hg.mozilla.org/mozilla-central/rev/66fc89b8e43a
https://hg.mozilla.org/mozilla-central/rev/7a131d2860bd

Comment 59

[Jean-Yves Avenard [:jya]]

Comment on attachment 8796818 [details]
Bug 1305826: P1. Fix move constructor.

Only either patch 2 or patch 3 is really necessary. But P1 is trivial and will remove a unnecessary memory allocation happening all the time..
So may as well do uplift them all.

Approval Request Comment
[Feature/regressing bug #]:1264199
[User impact if declined]: mono MP3 will sound distorted on both XP and maybe other systems. 
[Describe test coverage new/current, TreeHerder]: manual testing.
[Risks and why]: can't think of any. Under some circumstances we allocated more memory than we actually need. As we used the size of the buffer to determine how many audio samples it contained, it caused garbage to be introduced every few milliseconds.
[String/UUID change made/needed]: none

Comment 60

[Ritu Kothari (:ritu) (Inactive, please n-i to RyanVM, jcristau, or pascal)]

Hello Bill, could you please verify this issue is fixed as expected on a latest Nightly build? Thanks!

Comment 61

[Ritu Kothari (:ritu) (Inactive, please n-i to RyanVM, jcristau, or pascal)]

Comment on attachment 8796818 [details]
Bug 1305826: P1. Fix move constructor.

Improves mono MP3 playback experience on XP, recent regression since 47, Aurora51+, Beta50+

Comment 62

[Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)]

https://hg.mozilla.org/releases/mozilla-aurora/rev/029b68618b0f
https://hg.mozilla.org/releases/mozilla-aurora/rev/671582bd7676
https://hg.mozilla.org/releases/mozilla-aurora/rev/ef29ba57ccf6

Comment 63

[Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)]

https://hg.mozilla.org/releases/mozilla-beta/rev/f8030737176a
https://hg.mozilla.org/releases/mozilla-beta/rev/6337f8f506c9
https://hg.mozilla.org/releases/mozilla-beta/rev/c6486bcf9164

Comment 64

[Bill]

Will do... should I take out the work-around media.forcestereo.enable  False statement??

Comment 65

[Jean-Yves Avenard [:jya]]

yes you should...
It should no longer be necessary.

It will also be fixed in Firefox Beta 50.

Comment 66

[Bill]

Hmmm,,, about:config ... found my entry - the forcestereo.enable, and couldn't delete it, but right key, 'reset' leaving 'string'?

I saw all the goodies,and reloaded FF, but the mp3 file is still rendered garbled...:-(

Comment 67

[Jean-Yves Avenard [:jya]]

How did you reload FF?

you need to use a version with the fix. At this stage, this is only on Nightly available there:
https://nightly.mozilla.org/

It is not available in the current version of firefox (currently 49)

Comment 68

[Jean-Yves Avenard [:jya]]

(In reply to Bill from comment #66)
> Hmmm,,, about:config ... found my entry - the forcestereo.enable, and
> couldn't delete it, but right key, 'reset' leaving 'string'?
that's the proper way to do it...

when you restart firefox, it will be removed

Comment 69

[Bill]

OK... nightly 52 installed, and the mp3 file in question sounds good !
What do I do until 50 is released? Do I get to keep this one??
Also, I was informed back up the page that 52 would be the last version to support XP3...

So, where do I stand...??

Bill

Comment 70

[Jean-Yves Avenard [:jya]]

First, thank you for confirming that the fix is working.

It will be available in the next release of firefox (version 50).

52 is several months away, after which it will go on long-term-support mode. So you're fine on windows XP on that front. You just won't get "new" version of firefox. But it will continue to receive security fixes.

For now, you can simply set again the media.forcestereo.enabled and use 49 and wait until 50 is released.

Feel free to use nightly if you are adventurous enough.

In the next few days, Firefox Beta and Firefox Developer Edition will contain the fix.

Comment 71

[Bill]

Jean-Yves, thanks for all that ... and it's good to hear that 52 isn't exactly the end of the road ;-)
I'm working on an 'upload' problem to Network Solutions and will try this nightly before going back to 49... I'll be glad to help in any way that I can... thanks to all!   BIll

Comment 73

[Ciprian Georgiu, Desktop QA]

I've managed to reproduce this issue on Firefox 39.0 with STR from comment 0.

This issue is verified fixed on 50.0b6 (2016-10-10), 51.0a2 (2016-10-12) and 52.0a1 (2016-10-12) under Windows XP.

Comment 74

[Bill]

THANKS, EVERYONE, FOR ALL YOUR HELP... ANYTIME I CAN BE OF SERVICE, LET ME KNOW...BILLL