author Sam Lantinga <slouken@libsdl.org>
Sun, 07 Jul 2019 09:10:56 -0700
changeset 12928 3c4a4b1077cd
parent 1833 e566046c73d9
permissions -rwxr-xr-x
Fixed bug 4710 - audio/alsa: avoid configuring hardware parameters with only a single period

Anthony Pesch

The previous code first configured the period size using snd_pcm_hw_par-
ams_set_period_size_near. Then, it further narrowed the configuration
space by calling snd_pcm_hw_params_set_buffer_size_near using a buffer
size of 2 times the _requested_ period size in order to try and get a
configuration with only 2 periods. If the configured period size was
larger than the requested size, the second call could inadvertently
narrow the configuration space to contain only a single period.

Rather than fixing the call to snd_pcm_hw_params_set_buffer_size_near
to use a size of 2 times the configured period size, the code has been
changed to use snd_pcm_hw_params_set_periods_min in order to more
clearly explain the intent.
     1 #!/bin/sh
     2 #
     3 # Regenerate configuration files
     4 cp acinclude.m4 aclocal.m4
     5 found=false
     6 for autoconf in autoconf autoconf259 autoconf-2.59
     7 do if which $autoconf >/dev/null 2>&1; then $autoconf && found=true; break; fi
     8 done
     9 if test x$found = xfalse; then
    10     echo "Couldn't find autoconf, aborting"
    11     exit 1
    12 fi