Changes between Initial Version and Version 2 of Ticket #504


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Timestamp:
Mar 11, 2008 8:08:45 PM (16 years ago)
Author:
nanang
Comment:

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  • Ticket #504

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

  • Ticket #504 – Description

    initial v2  
    1 Soundport's samples_per_frame is total samples number per frame of ALL channels. 
    2 While PA's frameCount refers to number of samples for EACH channel. 
    3 The PA callbacks implementations contains wrong assertion, since it is inconsistent with definitions above. 
     1Identified issues: 
     2 - 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): 
     3   - Soundport's samples_per_frame is total samples number per frame of ALL channels. 
     4   - While PA's frameCount refers to number of samples for EACH channel. 
     5 - Lack of channel_count multiplication in samples_per_frame calculation in some parts of stream causing silence in stereo audio call. 
     6 - STEREO_DEMO in pjsua causing crash in PortAudio without call (perhaps because of some pointer to PA buffer get overwritten)