mpg123 codec and MPlayer 1.1.1 test

My compile of mplayer did not have mpg123 codec. So it uses ffmp2float decoder for mp3.

In 486 PC i downloaded mpg123-1.22.4.tar.bz2

Replaced write_alsa function in alsa.c with this one:

static int write_alsa(audio_output_t *ao, unsigned char *buf, int bytes)
{
snd_pcm_t *pcm=(snd_pcm_t*)ao->userptr;
snd_pcm_uframes_t frames;
snd_pcm_sframes_t written;
frames = snd_pcm_bytes_to_frames(pcm, bytes);
written = snd_pcm_writei(pcm, buf, frames);
if (written == -EINTR) /* interrupted system call */
written = 0;
else if (written == -EPIPE) { /* underrun */
if (snd_pcm_prepare(pcm) >= 0)
written = snd_pcm_writei(pcm, buf, frames);
}
if (written >= 0)
return snd_pcm_frames_to_bytes(pcm, written);
else
{
if(snd_pcm_state(pcm) == SND_PCM_STATE_SUSPENDED)
{
/* Iamnothappyabouthisnothappyreallynot. */
snd_pcm_resume(pcm);
if(snd_pcm_state(pcm) == SND_PCM_STATE_SUSPENDED)
{
error("device still suspended after resume hackery... giving up");
return -1;
}
}
return 0;
}
}

This is present in mpg123-1.14.4 and changed in later versions. If above change is not made then it will not play mp3 files and cpu usage is 100%.

Patch file for download.

Then created package.
Configuration line was:

./configure --prefix=/usr i486-kola-linux --enable-int-quality=yes  --enable-buffer=yes  --enable-modules=no --with-optimization=3

Installed it on 486 and also on my virtual box so i can compile mplayer 1.1.1

After transferring new mplayer binary to 486 made test. Player command line options: -lavdopts lowres=0:skiploopfilter=all:skipidct=bidir -framedrop -af channels 1

alsa-driver-1.0.23 compile

First downloaded alsa-driver-1.0.25
ftp://ftp.alsa-project.org/pub/driver/

made package and installed.
after boot got:
snd.o: unresolved symbol lock_kernel

Reading here about it:
https://www.alsa-project.org/pipermail/alsa-devel/2011-November/046173.html

So, going back to 1.0.23 version

 wget ftp://ftp.alsa-project.org/pub/driver/alsa-driver-1.0.23.tar.bz2

 Still there is defined CONFIG_SND_HAVE_NEW_IOCTL on older versions. This is where lock_kernel and unlock_kernel originates.

Need to dig deeper so i can compile v1.0.25. But for now v1.0.23 is ok.

After building v1.0.23 and installing it i removed v1.0.25. But a lone driver snd-es18xx was present in modules dir. It was compiled for older kernel. I removed it and ran:

depmod

Now kernel will not complain about missing drivers.

Here is build and install process:

I need to compile also alsa programs. System has some older version and complains about it on bootup.