[pulseaudio-tickets] [Bug 84804] Pulseaudio doesn't work on (pro audio) soundcards with high channel counts

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84804

--- Comment #20 from Raymond <superquad.vortex2 at gmail.com> ---
http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=include/pcm.h;hb=HEAD

/** PCM access type */
typedef enum _snd_pcm_access {
    /** mmap access with simple interleaved channels */
    SND_PCM_ACCESS_MMAP_INTERLEAVED = 0,
    /** mmap access with simple non interleaved channels */
    SND_PCM_ACCESS_MMAP_NONINTERLEAVED,
    /** mmap access with complex placement */
    SND_PCM_ACCESS_MMAP_COMPLEX,
    /** snd_pcm_readi/snd_pcm_writei access */
    SND_PCM_ACCESS_RW_INTERLEAVED,
    /** snd_pcm_readn/snd_pcm_writen access */
    SND_PCM_ACCESS_RW_NONINTERLEAVED,
    SND_PCM_ACCESS_LAST = SND_PCM_ACCESS_RW_NONINTERLEAVED
} snd_pcm_access_t;


there are five pcm access type but pulseaudio only support two and does not
report any error when the sound card does not support interleaved modes

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