Author: wmb Date: Fri Jul 16 21:44:16 2010 New Revision: 1882 URL: http://tracker.coreboot.org/trac/openfirmware/changeset/1882
Log: OLPC trac 10236 - in "test /audio" on XO-1.5, make the recorded sound play back on both speakers.
Modified: dev/geode/ac97/selftest.fth
Modified: dev/geode/ac97/selftest.fth ============================================================================== --- dev/geode/ac97/selftest.fth Thu Jul 15 20:38:18 2010 (r1881) +++ dev/geode/ac97/selftest.fth Fri Jul 16 21:44:16 2010 (r1882) @@ -18,14 +18,19 @@ d# 250 ms \ Settling time for DC offset filter ;
+\ We record in stereo even thought there is probably only one mic. +\ For some systems (e.g. AD1888 AC97 CODEC on XO-1), the data from the one +\ mic appears in both left and right channels. For others (e.g. +\ Conexant HDaudio CODEC on XO-1.5), the mic data appears in only the +\ left channel. We take care of that later in "mic-test". : record ( -- ) - open-in establish-level + open-in stereo establish-level record-base record-len audio-in drop close-in ;
: play ( -- ) - open-out + open-out stereo record-base record-len audio-out drop write-done ;
@@ -169,11 +174,22 @@ d# -9 set-volume stereo play ;
+\ Duplicate left channel data into the right channel +: copy-left-to-right ( adr len -- ) + bounds ?do i w@ i wa1+ w! /l +loop +; + +\ The recording data format is stereo, but usually there is only one mic. +\ Depending on the CODEC used, the right channel of the recording is either +\ the same as the left or quiet. In this test, we use copy-left-to-right +\ to propagate the left input into both channels for playback. + : mic-test ( -- ) ." Recording ..." cr - mono record + record + record-base record-len copy-left-to-right ." Playing ..." cr - d# -3 set-volume mono play + d# -3 set-volume play ;
: selftest ( -- error? )