kernel-packages team mailing list archive

[Raymond <1286021@xxxxxxxxxxxxxxxxxx>]

pulseaudio assume surround21 is four channels since buffer time is half
of stereo

why alsa lib surround21 did not specity any channel ?


http://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=48f1b308cc66152eb6db66742dd0d08d888cda8d;hp=5c4cd46810cef8850b037fca9e38ffd43b0bff22

2.1 speaker set is different from 5.1 speaker set


070|   0.000) D: [pulseaudio] alsa-util.c: Trying front:0 with SND_PCM_NO_AUTO_FORMAT ...
(   0.071|   0.000) D: [pulseaudio] alsa-util.c: Managed to open front:0
(   0.071|   0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 ms
(   0.071|   0.000) D: [pulseaudio] alsa-util.c: Set buffer size first (to 3528 samples), period size second (to 441 samples).
(   0.071|   0.000) D: [pulseaudio] alsa-mixer.c: Profile output:analog-stereo+input:analog-stereo supported.
(   0.071|   0.000) D: [pulseaudio] alsa-mixer.c: Skipping profile output:analog-stereo+input:iec958-stereo - will not be able to open input:iec958-stereo
(   0.071|   0.000) D: [pulseaudio] alsa-mixer.c: Looking at profile output:analog-surround-21
(   0.071|   0.000) D: [pulseaudio] alsa-mixer.c: Checking for playback on Analog Surround 2.1 (analog-surround-21)
(   0.071|   0.000) D: [pulseaudio] alsa-util.c: Trying surround21:0 with SND_PCM_NO_AUTO_FORMAT ...
(   0.072|   0.000) D: [pulseaudio] alsa-util.c: Managed to open surround21:0
(   0.072|   0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 185 ms
(   0.094|   0.021) D: [pulseaudio] alsa-util.c: Set buffer size first (to 3528 samples), period size second (to 441 samples).
(   0.094|   0.000) D: [pulseaudio] alsa-mixer.c: Profile output:analog-surround-21 supported.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to alsa-lib in Ubuntu.
https://bugs.launchpad.net/bugs/1286021

Title:
  2.1 surround support (userspace)

Status in “alsa-lib” package in Ubuntu:
  Fix Committed
Status in “pulseaudio” package in Ubuntu:
  In Progress

Bug description:
  2.1 surround should work as seamlessly as other surround options, such
  as 4.0, 5.1 and 7.1 work today.

  Alsa-lib and pulseaudio patches for 14.04 can be tested here:

  https://launchpad.net/~diwic/+archive/surround21

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/1286021/+subscriptions