Performing all audio processing operations in the same place, allows to simplify the code.
Additionally, if accessibility.monoaudio.enable is not set, we always upmix mono to stereo so that if the first audio stream seen was mono, we aren't stuck playing all future streams in mono.
MozReview-Commit-ID: 5yANN6PLFhX
--HG--
extra : rebase_source : c789ba66fa168bc11064b2a329311d90b046c7fc
We attempt to avoid unnecessary resampling of 44.1kHz and 48kHz content, for all others we use cubeb's preferred sampling rate as final sampling rate.
MozReview-Commit-ID: 413qnsDFHzY
--HG--
extra : rebase_source : 2c783be7f6d2ccaab88cee70372905ea92b690f4
The audio is automatically converted to always match the format of the first processed sample.
This is a temporary approach, as it would be preferred to use a final sampling rate not causing too much quality loss.
MozReview-Commit-ID: Lo3827aon43
--HG--
extra : rebase_source : d8de2c85de5a78c2d1a17201a9d0c418ce3312e4
This will allow to easily detect audio configuration change prior immediate playback.
MozReview-Commit-ID: IwDUGOd17ND
--HG--
extra : rebase_source : 37e9e19a58d2e90b107eaf63a2ac19233c521033
Using the gfxprefs for the time being, in order to access the preferences outside of the main thread.
It will allow to easily test future cubeb changes to support change of sampling rate / multichannels.
MozReview-Commit-ID: 2Qvq4zAtzCL
--HG--
extra : rebase_source : 46e272ca46ceb35b8e97b62cd1d2be949ba054f2
Rather than performing the audio processing a few frames at a time, we perform the operation when popping the audio data block.
The only downmixing task left to AudioStream is to handle the force mono preference.
Resampling is currently disabled.
MozReview-Commit-ID: GNQA1h0xcp7
--HG--
extra : rebase_source : c58aa4514a0dc4de06be6dc1da6a598742caa262
PrincipalHandle is a thread safe pointer to a holder of (the main-thread-only
nsIPrincipal) that can be passed around the MSG.
A MediaStreamTrack whose source has just updated its principal, sets the new
principal aside (as its "pending principal"), and combines the new principal
into its current principal.
Then the source starts passing the new principal to the MediaStreamGraph as
a PrincipalHandle.
Changes to a track's PrincipalHandle on the MSG will be surfaced through the
MediaStreamTrackListener API. These changes are dispatched to main thread
and compared to a MediaStreamTrack's pending principal. In case of a match
the track knows the correct principal is flowing and can move the pending
principal to be the current principal and update any main thread principal
observers.
MozReview-Commit-ID: D0JXGWhQFFU
--HG--
extra : rebase_source : 296e269bb46fc5a85a9c3f90dfc0dc40e53572bc
This is a partial reversal of bug 1230338. We can't distinguish frames that are never composited because the media element is hidden from the frames genuinely dropped due to machine slowness. So until we can distinguish them, let's not report them as dropped.
MozReview-Commit-ID: ERV8Luaxp3F
Carsten "Tomcat" Book
Jean-Yves Avenard
Andreas Pehrson
JW Wang
Matthew Gregan
Alastor Wu
Birunthan Mohanathas
Phil Ringnalda
Matt Woodrow