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ALSA: pcm - Use UNKNOWN chmap for mono streams
In general, mono streams have no dedicated speaker assignment, thus they should be rather marked as UNKNOWN position. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -2311,7 +2311,7 @@ EXPORT_SYMBOL(snd_pcm_lib_readv);
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/* default channel maps for multi-channel playbacks, up to 8 channels */
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const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = {
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{ .channels = 1,
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.map = { SNDRV_CHMAP_FC } },
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.map = { SNDRV_CHMAP_UNKNOWN } },
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{ .channels = 2,
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.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
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{ .channels = 4,
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@ -2333,7 +2333,7 @@ EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps);
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/* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */
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const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = {
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{ .channels = 1,
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.map = { SNDRV_CHMAP_FC } },
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.map = { SNDRV_CHMAP_UNKNOWN } },
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{ .channels = 2,
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.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
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{ .channels = 4,
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