From: Clemens Ladisch <clemens@ladisch.de>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org, pulseaudio-discuss@lists.freedesktop.org
Subject: Re: Channel map API patches: to be 3.7 or not to be?
Date: Tue, 11 Sep 2012 14:19:49 +0200 [thread overview]
Message-ID: <504F2C65.1090204@ladisch.de> (raw)
In-Reply-To: <s5hehm8rc2s.wl%tiwai@suse.de>
Takashi Iwai wrote:
> BTW, this reminds me of an open question:
> is it useful to add SND_CHMAP_MONO, or is it just redundant?
>
> It's nothing but indicating a mono channel without any channel
> position, so I supposed SND_CHMAP_UNKNOWN being sufficient. OTOH,
> SND_CHMAP_MONO would give a clear sign of mono streams while
> SND_CHMAP_UNKNOWN could be used for any other exceptional purposes.
What would it be used for?
Labeling surround channels is necessary for reordering them or for doing
up/downmixing. A "mono" channel, however, does not appear to have any
semantic difference from a single "unknown" channel.
Regards,
Clemens
next prev parent reply other threads:[~2012-09-11 12:19 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-10 17:43 Channel map API patches: to be 3.7 or not to be? Takashi Iwai
2012-09-11 8:10 ` Raymond Yau
2012-09-11 8:22 ` Takashi Iwai
2012-09-11 12:14 ` Takashi Iwai
2012-09-11 12:19 ` Clemens Ladisch [this message]
2012-09-11 12:24 ` Takashi Iwai
2012-09-12 16:03 ` Takashi Iwai
2012-09-12 16:32 ` Clemens Ladisch
2012-09-12 17:20 ` [alsa-devel] " Tanu Kaskinen
2012-09-12 1:35 ` Raymond Yau
2012-09-12 6:21 ` Takashi Iwai
2012-09-17 10:46 ` Raymond Yau
2012-09-17 10:49 ` Takashi Iwai
2012-09-17 9:39 ` Takashi Iwai
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