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* ALSA: Define more channel map positionsTakashi Iwai2012-09-12
| | | | | | | | | | | | | | | | | | | For following the standard, define more channel map positions and shuffle the items a bit: - As both PulseAudio and gstreamer define MONO channel position explicitly, we should follow that, too. The mono streams point to this channel position unless they are explicitly assigned to certain channel positions. - Top-front-* and Top-rear-* positions are added, carried from PulseAudio's definitions. - Move NA and MONO definitions at the top of table right after UNKNOWN, since these are more abstract in comparison with other practical positions. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: Follow channel position definitions to alsa-lib mixerTakashi Iwai2012-09-06
| | | | | | | | | There is already a set of channel position definitions in alsa-lib mixer.h, and it'd be more practical to keep the same order for the PCM channel map, too. The value is shifted with 1 to keep zero for UNKNOWN. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: Add a documentation for channel mapping APITakashi Iwai2012-09-06
Signed-off-by: Takashi Iwai <tiwai@suse.de>