The following issue has been ASSIGNED. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2026> ====================================================================== Reported By: Raymond Assigned To: jcdutton ====================================================================== Project: ALSA - utils Issue ID: 2026 Category: speakertest Reproducibility: always Severity: major Priority: normal Status: assigned ====================================================================== Date Submitted: 04-17-2006 07:26 CEST Last Modified: 07-18-2006 14:30 CEST ====================================================================== Summary: random swapping of channels when running speaker-test Description: values return by read_wav seem strange at end of loop in write_loop. speaker-test -c 4 -t wav -D hw:0,0 speaker-test 1.0.11rc5 Playback device is hw:0,0 Stream parameters are 48000Hz, S16_LE, 4 channels WAV file(s) Rate set to 48000Hz (requested 48000Hz) Buffer size range from 2 to 8192 Period size range from 1 to 512 Using max buffer size 8192 Periods = 4 was set period_size = 512 was set buffer_size = 8192 0 - Front Left write_loop - channel=4 periods=281 period_size=512 bufsize=4096 read_wav n=1024 err=1024 read_wav n=2048 err=1024 read_wav n=3072 err=1024 read_wav n=4096 err=1024 read_wav n=5120 err=1024 read_wav n=6144 err=1024 read_wav n=7168 err=1024 read_wav n=8192 err=1024 read_wav n=9216 err=1024 read_wav n=10240 err=1024 read_wav n=11264 err=1024 read_wav n=12288 err=1024 read_wav n=13312 err=1024 read_wav n=14336 err=1024 read_wav n=15360 err=1024 read_wav n=16384 err=1024 read_wav n=17408 err=1024 read_wav n=18432 err=1024 read_wav n=19456 err=1024 read_wav n=20480 err=1024 read_wav n=21504 err=1024 read_wav n=22528 err=1024 read_wav n=23552 err=1024 read_wav n=24576 err=1024 read_wav n=25600 err=1024 read_wav n=26624 err=1024 read_wav n=27648 err=1024 read_wav n=28672 err=1024 read_wav n=29696 err=1024 read_wav n=30720 err=1024 read_wav n=31744 err=1024 read_wav n=32768 err=1024 read_wav n=33792 err=1024 read_wav n=34816 err=1024 read_wav n=35840 err=1024 read_wav n=36864 err=1024 read_wav n=37888 err=1024 read_wav n=38912 err=1024 read_wav n=39936 err=1024 read_wav n=40960 err=1024 read_wav n=41984 err=1024 read_wav n=43008 err=1024 read_wav n=44032 err=1024 read_wav n=45056 err=1024 read_wav n=46080 err=1024 read_wav n=47104 err=1024 read_wav n=48128 err=1024 read_wav n=49152 err=1024 read_wav n=50176 err=1024 read_wav n=51200 err=1024 read_wav n=52224 err=1024 read_wav n=53248 err=1024 read_wav n=54272 err=1024 read_wav n=55296 err=1024 read_wav n=56320 err=1024 read_wav n=57344 err=1024 read_wav n=58368 err=1024 read_wav n=59392 err=1024 read_wav n=60416 err=1024 read_wav n=61440 err=1024 read_wav n=62464 err=1024 read_wav n=63488 err=1024 read_wav n=64512 err=1024 read_wav n=65536 err=1024 read_wav n=66560 err=1024 read_wav n=67584 err=1024 read_wav n=68608 err=1024 read_wav n=69632 err=1024 read_wav n=70656 err=1024 read_wav n=71680 err=1024 read_wav n=72704 err=1024 read_wav n=73728 err=1024 read_wav n=74752 err=1024 read_wav n=75776 err=1024 read_wav n=76800 err=1024 read_wav n=77824 err=1024 read_wav n=78848 err=1024 read_wav n=79872 err=1024 read_wav n=80896 err=1024 read_wav n=81920 err=1024 read_wav n=82944 err=1024 read_wav n=83968 err=1024 read_wav n=84992 err=1024 read_wav n=86016 err=1024 read_wav n=87040 err=1024 read_wav n=88064 err=1024 read_wav n=89088 err=1024 read_wav n=90112 err=1024 read_wav n=91136 err=1024 read_wav n=92160 err=1024 read_wav n=93184 err=1024 read_wav n=94208 err=1024 read_wav n=95232 err=1024 read_wav n=96256 err=1024 read_wav n=97280 err=1024 read_wav n=98304 err=1024 read_wav n=99328 err=1024 read_wav n=100352 err=1024 read_wav n=101376 err=1024 read_wav n=102400 err=1024 read_wav n=103424 err=1024 read_wav n=104448 err=1024 read_wav n=105472 err=1024 read_wav n=106496 err=1024 read_wav n=107520 err=1024 read_wav n=108544 err=1024 read_wav n=109568 err=1024 read_wav n=110592 err=1024 read_wav n=111616 err=1024 read_wav n=112640 err=1024 read_wav n=113664 err=1024 read_wav n=114688 err=1024 read_wav n=115712 err=1024 read_wav n=116736 err=1024 read_wav n=117760 err=1024 read_wav n=118784 err=1024 read_wav n=119808 err=1024 read_wav n=120832 err=1024 read_wav n=121856 err=1024 read_wav n=122880 err=1024 read_wav n=123904 err=1024 read_wav n=124928 err=1024 read_wav n=125952 err=1024 read_wav n=126976 err=1024 read_wav n=128000 err=1024 read_wav n=129024 err=1024 read_wav n=130048 err=1024 read_wav n=131072 err=1024 read_wav n=132096 err=1024 read_wav n=133120 err=1024 read_wav n=134144 err=1024 read_wav n=135168 err=1024 read_wav n=136192 err=1024 read_wav n=137216 err=1024 read_wav n=138240 err=1024 read_wav n=139202 err=962 read_wav n=139922 err=720 read_wav n=140462 err=540 read_wav n=140868 err=406 read_wav n=141172 err=304 read_wav n=141400 err=228 read_wav n=141572 err=172 read_wav n=141700 err=128 read_wav n=141796 err=96 read_wav n=141868 err=72 read_wav n=141922 err=54 read_wav n=141962 err=40 read_wav n=141992 err=30 read_wav n=142016 err=24 read_wav n=142034 err=18 read_wav n=142046 err=12 read_wav n=142056 err=10 read_wav n=142064 err=8 read_wav n=142070 err=6 read_wav n=142074 err=4 read_wav n=142076 err=2 read_wav n=142078 err=2 read_wav n=142080 err=2 read_wav n=142082 err=2 1 - Front Right write_loop - channel=4 periods=281 period_size=512 bufsize=4096 read_wav n=1024 err=1024 read_wav n=2048 err=1024 read_wav n=3072 err=1024 read_wav n=4096 err=1024 read_wav n=5120 err=1024 read_wav n=6144 err=1024 read_wav n=7168 err=1024 read_wav n=8192 err=1024 read_wav n=9216 err=1024 read_wav n=10240 err=1024 read_wav n=11264 err=1024 read_wav n=12288 err=1024 read_wav n=13312 err=1024 read_wav n=14336 err=1024 read_wav n=15360 err=1024 read_wav n=16384 err=1024 read_wav n=17408 err=1024 read_wav n=18432 err=1024 read_wav n=19456 err=1024 read_wav n=20480 err=1024 read_wav n=21504 err=1024 read_wav n=22528 err=1024 read_wav n=23552 err=1024 read_wav n=24576 err=1024 read_wav n=25600 err=1024 read_wav n=26624 err=1024 read_wav n=27648 err=1024 read_wav n=28672 err=1024 read_wav n=29696 err=1024 read_wav n=30720 err=1024 read_wav n=31744 err=1024 read_wav n=32768 err=1024 read_wav n=33792 err=1024 read_wav n=34816 err=1024 read_wav n=35840 err=1024 read_wav n=36864 err=1024 read_wav n=37888 err=1024 read_wav n=38912 err=1024 read_wav n=39936 err=1024 read_wav n=40960 err=1024 read_wav n=41984 err=1024 read_wav n=43008 err=1024 read_wav n=44032 err=1024 read_wav n=45056 err=1024 read_wav n=46080 err=1024 read_wav n=47104 err=1024 read_wav n=48128 err=1024 read_wav n=49152 err=1024 read_wav n=50176 err=1024 read_wav n=51200 err=1024 read_wav n=52224 err=1024 read_wav n=53248 err=1024 read_wav n=54272 err=1024 read_wav n=55296 err=1024 read_wav n=56320 err=1024 read_wav n=57344 err=1024 read_wav n=58368 err=1024 read_wav n=59392 err=1024 read_wav n=60416 err=1024 read_wav n=61440 err=1024 read_wav n=62464 err=1024 read_wav n=63488 err=1024 read_wav n=64512 err=1024 read_wav n=65536 err=1024 read_wav n=66560 err=1024 read_wav n=67584 err=1024 read_wav n=68608 err=1024 read_wav n=69632 err=1024 read_wav n=70656 err=1024 read_wav n=71680 err=1024 read_wav n=72704 err=1024 read_wav n=73728 err=1024 read_wav n=74752 err=1024 read_wav n=75776 err=1024 read_wav n=76800 err=1024 read_wav n=77824 err=1024 read_wav n=78848 err=1024 read_wav n=79872 err=1024 read_wav n=80896 err=1024 read_wav n=81920 err=1024 read_wav n=82944 err=1024 read_wav n=83968 err=1024 read_wav n=84992 err=1024 read_wav n=86016 err=1024 read_wav n=87040 err=1024 read_wav n=88064 err=1024 read_wav n=89088 err=1024 read_wav n=90112 err=1024 read_wav n=91136 err=1024 read_wav n=92160 err=1024 read_wav n=93184 err=1024 read_wav n=94208 err=1024 read_wav n=95232 err=1024 read_wav n=96256 err=1024 read_wav n=97280 err=1024 read_wav n=98304 err=1024 read_wav n=99328 err=1024 read_wav n=100352 err=1024 read_wav n=101376 err=1024 read_wav n=102400 err=1024 read_wav n=103424 err=1024 read_wav n=104448 err=1024 read_wav n=105472 err=1024 read_wav n=106496 err=1024 read_wav n=107520 err=1024 read_wav n=108544 err=1024 read_wav n=109568 err=1024 read_wav n=110592 err=1024 read_wav n=111616 err=1024 read_wav n=112640 err=1024 read_wav n=113664 err=1024 read_wav n=114688 err=1024 read_wav n=115712 err=1024 read_wav n=116736 err=1024 read_wav n=117760 err=1024 read_wav n=118784 err=1024 read_wav n=119808 err=1024 read_wav n=120832 err=1024 read_wav n=121856 err=1024 read_wav n=122880 err=1024 read_wav n=123904 err=1024 read_wav n=124928 err=1024 read_wav n=125952 err=1024 read_wav n=126976 err=1024 read_wav n=128000 err=1024 read_wav n=129024 err=1024 read_wav n=130048 err=1024 read_wav n=131072 err=1024 read_wav n=132096 err=1024 read_wav n=133120 err=1024 read_wav n=134144 err=1024 read_wav n=135168 err=1024 read_wav n=136192 err=1024 read_wav n=137216 err=1024 read_wav n=138240 err=1024 read_wav n=139264 err=1024 read_wav n=140288 err=1024 read_wav n=141312 err=1024 read_wav n=142336 err=1024 read_wav n=143360 err=1024 read_wav n=144256 err=896 read_wav n=144928 err=672 read_wav n=145432 err=504 read_wav n=145810 err=378 read_wav n=146094 err=284 read_wav n=146308 err=214 read_wav n=146468 err=160 read_wav n=146588 err=120 read_wav n=146678 err=90 read_wav n=146746 err=68 read_wav n=146796 err=50 read_wav n=146834 err=38 read_wav n=146862 err=28 read_wav n=146884 err=22 read_wav n=146900 err=16 read_wav n=146912 err=12 read_wav n=146920 err=8 read_wav n=146926 err=6 read_wav n=146932 err=6 read_wav n=146936 err=4 read_wav n=146938 err=2 read_wav n=146940 err=2 read_wav n=146942 err=2 read_wav n=146944 err=2 3 - Rear Right write_loop - channel=4 periods=281 period_size=512 bufsize=4096 read_wav n=1024 err=1024 read_wav n=2048 err=1024 ====================================================================== ---------------------------------------------------------------------- Raymond - 04-18-06 14:33 ---------------------------------------------------------------------- int bufsize = snd_pcm_frames_to_bytes(handle, period_size); The value bufsize is the size of n-channels pcm but the wav file is mono ---------------------------------------------------------------------- Raymond - 04-28-06 06:16 ---------------------------------------------------------------------- James, speaker-test -t wav has some strange behaviour when writing the last few buffers ( it split them to many small fragments ),it seem to be a bug in read_wav() ---------------------------------------------------------------------- Raymond - 04-29-06 13:16 ---------------------------------------------------------------------- --- alsa-utils-1.0.11/speaker-test/speaker-test.c.orig 2006-04-07 01:24:12.000000000 +0800 +++ alsa-utils-1.0.11/speaker-test/speaker-test.c 2006-04-29 19:10:27.000000000 +0800 @@ -613,7 +613,6 @@ } if (offset + bufsize > wav_file_size[channel]) bufsize = wav_file_size[channel] - offset; - bufsize /= channels; for (size = 0; size < bufsize; size += 2) { int chn; for (chn = 0; chn < channels; chn++) { ---------------------------------------------------------------------- Raymond - 05-31-06 15:23 ---------------------------------------------------------------------- Why do speaker-test split the last 2/3 buffers into smaller fragments ? This seem to be the cause of random channel swapping ---------------------------------------------------------------------- Raymond - 06-03-06 03:02 ---------------------------------------------------------------------- This strange behaviour of read_wav() also occur when using 2 channels speaker-test -c2 -t wav -Dhw:1,0 speaker-test 1.0.11 Playback device is hw:1,0 Stream parameters are 48000Hz, S16_LE, 2 channels WAV file(s) Rate set to 48000Hz (requested 48000Hz) Buffer size range from 8 to 16384 Period size range from 8 to 16384 Using max buffer size 16384 Periods = 4 was set period_size = 4096 was set buffer_size = 16384 0 - Front Left n=8192 err=8192 n=16384 err=8192 n=24576 err=8192 n=32768 err=8192 n=40960 err=8192 n=49152 err=8192 n=57344 err=8192 n=65536 err=8192 n=73728 err=8192 n=81920 err=8192 n=90112 err=8192 n=98304 err=8192 n=106496 err=8192 n=114688 err=8192 n=122880 err=8192 n=131072 err=8192 n=136578 err=5506 n=139332 err=2754 n=140708 err=1376 n=141396 err=688 n=141740 err=344 n=141912 err=172 n=141998 err=86 n=142042 err=44 n=142064 err=22 n=142074 err=10 n=142080 err=6 n=142082 err=2 n=142084 err=2 1 - Front Right n=8192 err=8192 n=16384 err=8192 n=24576 err=8192 n=32768 err=8192 n=40960 err=8192 n=49152 err=8192 n=57344 err=8192 n=65536 err=8192 n=73728 err=8192 n=81920 err=8192 n=90112 err=8192 n=98304 err=8192 n=106496 err=8192 n=114688 err=8192 n=122880 err=8192 n=131072 err=8192 n=139010 err=7938 n=142978 err=3968 n=144962 err=1984 n=145954 err=992 n=146450 err=496 n=146698 err=248 n=146822 err=124 n=146884 err=62 n=146916 err=32 n=146932 err=16 n=146940 err=8 n=146944 err=4 n=146946 err=2 Time per period = 2.790380 0 - Front Left Issue History Date Modified Username Field Change ====================================================================== 04-17-06 07:26 Raymond New Issue 04-18-06 14:33 Raymond Note Added: 0009334 04-28-06 06:16 Raymond Issue Monitored: jcdutton 04-28-06 06:16 Raymond Note Added: 0009539 04-29-06 13:16 Raymond Note Added: 0009542 05-31-06 15:23 Raymond Issue Monitored: tiwai 05-31-06 15:23 Raymond Note Added: 0010022 06-03-06 03:02 Raymond Note Added: 0010059 07-18-06 14:30 jcdutton Status new => assigned 07-18-06 14:30 jcdutton Assigned To => jcdutton ====================================================================== ------------------------------------------------------------------------- Take Surveys. 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