Opened 17 years ago

Last modified 17 years ago

#504 closed defect

Problem in multichannel audio — at Version 2

Reported by: nanang Owned by: nanang
Priority: normal Milestone: release-0.9.0
Component: pjmedia Version: trunk
Keywords: Cc:
Backport to 1.x milestone: Backported:

Description (last modified by nanang)

Identified issues:

  • The PA callbacks implementations contains wrong assertion, because of samples_per_frame misinterpretation (thanks Rodrigo Vega, ​http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2008-March/001974.html):
    • Soundport's samples_per_frame is total samples number per frame of ALL channels.
    • While PA's frameCount refers to number of samples for EACH channel.
  • Lack of channel_count multiplication in samples_per_frame calculation in some parts of stream causing silence in stereo audio call.
  • STEREO_DEMO in pjsua causing crash in PortAudio? without call (perhaps because of some pointer to PA buffer get overwritten)

Change History (4)

Changed 17 years ago by nanang

Fixed assertion param in PortAudio?'s callback implementation

comment:1 Changed 17 years ago by bennylp

Patch ticket504.patch committed in r1848, thanks.

comment:2 Changed 17 years ago by nanang

  • Description modified (diff)
  • Summary changed from Wrong assertion param in portaudio callbacks (thanks Rodrigo Vega) to Problem in multichannel audio

Changed 17 years ago by nanang

Fixed calculation of samples_per_frame in stream port

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