snd_ali_alloc_pcm_channel
result = snd_ali_alloc_pcm_channel(codec, idx);
result = snd_ali_alloc_pcm_channel(codec, idx);
result = snd_ali_alloc_pcm_channel(codec, idx);
idx = channel > 0 ? snd_ali_alloc_pcm_channel(codec, channel) :