Hello and happy new year.
I'm having problems getting the pcm hw parameters set up correctly:
| $ sg audio -c "./aplay /opt/qt-2.2.4/examples/sound/sounds/1.wav"
| Playing WAVE '/opt/qt-2.2.4/examples/sound/sounds/1.wav' : \
| Unsigned 8 bit, Rate 8000 Hz, Mono
| aplay: set_params:875: Unable to install hw params:
| ACCESS: RW_INTERLEAVED
| FORMAT: U8
| SUBFORMAT: STD
| SAMPLE_BITS: 8
| FRAME_BITS: 8
| CHANNELS: 1
| RATE: NONE <---- looks bad
| PERIOD_TIME: (1365333 1365334) <---- ditto
| PERIOD_SIZE: (183712867 183712868) <---- ditto
| PERIOD_BYTES: (183712867 183712868)
| PERIODS: (1 2)
| BUFFER_TIME: (1365333 1365334)
| BUFFER_SIZE: 183712912
| BUFFER_BYTES: 183712912
| TICK_TIME: 10000
Running aplay under gdb reveals:
| (gdb) where
| #0 snd_pcm_hw_param_set_near (pcm=0x805ad08, params=0xbffff654,
| var=SNDRV_PCM_HW_PARAM_RATE, val=0xbffff5dc, dir=0x0) at pcm_params.c:787
| #1 0x4005459a in __snd_pcm_hw_params_set_rate_near (pcm=0x805ad08,
| params=0xbffff654, val=0xbffff5dc, dir=0x0) at pcm.c:3593
| #2 0x400582a4 in snd_pcm_hw_params_set_rate_near (pcm=0x805ad08,
| params=0xbffff654, val=134555356, dir=0x0) at pcm.c:6437
| #3 0x804c4fd in set_params () at aplay.c:841
| #4 0x804ec53 in playback_go (fd=4, loaded=0, count=8580, rtype=2,
| name=0xbffffca9 "/opt/qt-2.2.4/examples/sound/sounds/1.wav")
| at aplay.c:1776
| #5 0x804f0ef in playback (
| name=0xbffffca9 "/opt/qt-2.2.4/examples/sound/sounds/1.wav")
| at aplay.c:1899
| #6 0x804b796 in main (argc=2, argv=0xbffffb44) at aplay.c:553
| #7 0x40101856 in __libc_start_main (main=0x804ad7c <main>, argc=2,
| argv=0xbffffb44, init=0x8049d68 <_init>, fini=0x804fa94 <_fini>,
| rtld_fini=0x4000a480 <_dl_fini>, stack_end=0xbffffb3c)
| at ../sysdeps/generic/libc-start.c:92
| (gdb) list 780,786
| 780 int snd_pcm_hw_param_set_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
| 781 snd_pcm_hw_param_t var,
| 782 unsigned int *val, int *dir)
| 783 {
| 784 snd_pcm_hw_params_t save;
| 785 int err;
| 786 unsigned int best = *val, saved_min;
| (gdb) print *val
| $2 = 134555356
| (gdb) print **val
| $3 = 8000 <---- this is what should be assigned to "best"
| (gdb) print best
| $4 = 134555356
The 4th argument to snd_pcm_hw_param_set_near(), and
the 3rd argument to __snd_pcm_hw_params_set_rate_near(),
named "val", seems to have been dereferenced once too often.
I suspect the macro __P_OLD_NEAR1(pfx, name, ret_type) in /src/pcm/pcm.c,
but have also seen the discussion early in November, 2003,
Subject: Re: [Alsa-devel] switch to new PCM API for 1.0 release
between Jaroslav Kysela <[EMAIL PROTECTED]> and
Martin Langer <[EMAIL PROTECTED]>
where the cause was mixing libraries or headers of different versions.
I have not found any sign of this here, although it does seem strange
that there are not more people reporting the same problem.
alsa-lib-1.0.0rc2 was configured with
CFLAGS="-g -O2" LDFLAGS="-g -O2" ./configure \
--with-versioned=no --with-debug=yes
alsa-utils-1.0.0rc2 was configured with
CFLAGS="-g O2" LDFLAGS="-g O2" ./configure
and I'm using gcc 2.95.3 and linux-2.2.25.
Ted.
--
Ted <[EMAIL PROTECTED]>
http://www.nowtsfree.freeserve.co.uk
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