From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 27 Jul 2012 16:27:00 +0000 (+0200)
Subject: ALSA: PCM: channel mapping API implementation
X-Git-Tag: v3.7-rc1~81^2~31^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d3391ec0ecca37efb6bc995906292f47522b471;p=pandora-kernel.git

ALSA: PCM: channel mapping API implementation

This patch implements the basic data types for the standard channel
mapping API handling.

- The definitions of the channel positions and the new TLV types are
  added in sound/asound.h and sound/tlv.h, so that they can be
  referred from user-space.

- Introduced a new helper function snd_pcm_add_chmap_ctls() to create
  control elements representing the channel maps for each PCM
  (sub)stream.

- Some standard pre-defined channel maps are provided for
  convenience.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
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