snd_pcm_mmap_begin returns 0 but sets areas to NULL

[Carlo Wood <carlo@alinoe.com>]

Is it ever allowed that:

    snd_pcm_channel_area_t const* areas;
    snd_pcm_uframes_t offset;
    snd_pcm_uframes_t size = period_size;
    if (size > 0)
    {
      snd_pcm_uframes_t frames = size;
      int err = snd_pcm_mmap_begin(handle, &areas, &offset, &frames);

returns err == 0, but results in areas == NULL ?

Or is that a bug in alsa?

-- 
Carlo Wood <carlo@alinoe.com>


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