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use requested parameters (for sample bits, khz, channels) with ALSA

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git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@2263 fc73d0e0-1445-4013-8a0c-d673dee63da5
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TimeServ 2006-05-09 21:38:27 +00:00
parent 968ddb9759
commit 0bb99da40b
1 changed files with 76 additions and 133 deletions
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209
engine/client/snd_alsa.c
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@ -197,15 +197,15 @@ static int ALSA_InitCard (soundcardinfo_t *sc, int cardnum)
cvar_t *devname; cvar_t *devname;
int err, i; int err, i;
int bps = -1, stereo = -1; int bps, stereo;
unsigned int rate = 0; unsigned int rate;
snd_pcm_hw_params_t *hw; snd_pcm_hw_params_t *hw;
snd_pcm_sw_params_t *sw; snd_pcm_sw_params_t *sw;
snd_pcm_uframes_t frag_size; snd_pcm_uframes_t frag_size;
if (!Alsa_InitAlsa()) if (!Alsa_InitAlsa())
{ {
Con_Printf("Alsa does not appear to be installed or compatable\n"); Con_Printf(S_ERROR "Alsa does not appear to be installed or compatable\n");
return 2; return 2;
} }
@ -228,197 +228,140 @@ static int ALSA_InitCard (soundcardinfo_t *sc, int cardnum)
Con_Printf("Initing ALSA sound device %s\n", pcmname); Con_Printf("Initing ALSA sound device %s\n", pcmname);
// COMMANDLINEOPTION: Linux ALSA Sound: -sndbits <number> sets sound precision to 8 or 16 bit (email me if you want others added)
if ((i=COM_CheckParm("-sndbits")) != 0)
{
bps = atoi(com_argv[i+1]);
if (bps != 16 && bps != 8)
{
Con_Printf("Error: invalid sample bits: %d\n", bps);
return false;
}
}
// COMMANDLINEOPTION: Linux ALSA Sound: -sndspeed <hz> chooses 44100 hz, 22100 hz, or 11025 hz sound output rate
if ((i=COM_CheckParm("-sndspeed")) != 0)
{
rate = atoi(com_argv[i+1]);
if (rate!=44100 && rate!=22050 && rate!=11025)
{
Con_Printf("Error: invalid sample rate: %d\n", rate);
return false;
}
}
// COMMANDLINEOPTION: Linux ALSA Sound: -sndmono sets sound output to mono
if ((i=COM_CheckParm("-sndmono")) != 0)
stereo=0;
// COMMANDLINEOPTION: Linux ALSA Sound: -sndstereo sets sound output to stereo
if ((i=COM_CheckParm("-sndstereo")) != 0)
stereo=1;
err = psnd_pcm_open (&pcm, pcmname, SND_PCM_STREAM_PLAYBACK, err = psnd_pcm_open (&pcm, pcmname, SND_PCM_STREAM_PLAYBACK,
SND_PCM_NONBLOCK); SND_PCM_NONBLOCK);
if (0 > err) { if (0 > err)
Con_Printf ("Error: audio open error: %s\n", psnd_strerror (err)); {
Con_Printf (S_ERROR "Error: audio open error: %s\n", psnd_strerror (err));
return 0; return 0;
} }
Con_Printf ("ALSA: Using PCM %s.\n", pcmname); Con_Printf ("ALSA: Using PCM %s.\n", pcmname);
err = psnd_pcm_hw_params_any (pcm, hw); err = psnd_pcm_hw_params_any (pcm, hw);
if (0 > err) { if (0 > err) {
Con_Printf ("ALSA: error setting hw_params_any. %s\n", Con_Printf (S_ERROR "ALSA: error setting hw_params_any. %s\n",
psnd_strerror (err)); psnd_strerror (err));
goto error; goto error;
} }
err = psnd_pcm_hw_params_set_access (pcm, hw, SND_PCM_ACCESS_MMAP_INTERLEAVED); err = psnd_pcm_hw_params_set_access (pcm, hw, SND_PCM_ACCESS_MMAP_INTERLEAVED);
if (0 > err) { if (0 > err)
Con_Printf ("ALSA: Failure to set noninterleaved PCM access. %s\n" {
Con_Printf (S_ERROR "ALSA: Failure to set noninterleaved PCM access. %s\n"
"Note: Interleaved is not supported\n", "Note: Interleaved is not supported\n",
psnd_strerror (err)); psnd_strerror (err));
goto error; goto error;
} }
switch (bps) { // get sample bit size
case -1: bps = sc->sn.samplebits;
err = psnd_pcm_hw_params_set_format (pcm, hw, SND_PCM_FORMAT_S16); {
if (0 <= err) { snd_pcm_format_t spft;
bps = 16; if (bps == 16)
} else if (0 <= (err = psnd_pcm_hw_params_set_format (pcm, hw, SND_PCM_FORMAT_U8))) { spft = SND_PCM_FORMAT_S16;
else
spft = SND_PCM_FORMAT_U8;
err = psnd_pcm_hw_params_set_format (pcm, hw, spft);
while (err < 0)
{
if (spft == SND_PCM_FORMAT_S16)
{
bps = 8; bps = 8;
} else { spft = SND_PCM_FORMAT_U8;
Con_Printf ("ALSA: no useable formats. %s\n", }
psnd_strerror (err)); else
{
Con_Printf (S_ERROR "ALSA: no usable formats. %s\n", psnd_strerror (err));
goto error; goto error;
} }
break; err = psnd_pcm_hw_params_set_format (pcm, hw, spft);
case 8: }
case 16:
err = psnd_pcm_hw_params_set_format (pcm, hw, bps == 8 ?
SND_PCM_FORMAT_U8 :
SND_PCM_FORMAT_S16);
if (0 > err) {
Con_Printf ("ALSA: no usable formats. %s\n",
psnd_strerror (err));
goto error;
}
break;
default:
Con_Printf ("ALSA: desired format not supported\n");
goto error;
} }
switch (stereo) { // get speaker channels
case -1: stereo = sc->sn.numchannels;
err = psnd_pcm_hw_params_set_channels (pcm, hw, 2); err = psnd_pcm_hw_params_set_channels (pcm, hw, stereo);
if (0 <= err) { while (err < 0)
stereo = 1; {
} else if (0 <= (err = psnd_pcm_hw_params_set_channels (pcm, hw, 1))) { if (stereo > 2)
stereo = 0; stereo = 2;
} else { else if (stereo > 1)
Con_Printf ("ALSA: no usable channels. %s\n", stereo = 1;
psnd_strerror (err)); else
goto error; {
} Con_Printf (S_ERROR "ALSA: no usable number of channels. %s\n", psnd_strerror (err));
break;
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
err = psnd_pcm_hw_params_set_channels (pcm, hw, stereo+1);
if (0 > err) {
Con_Printf ("ALSA: no usable channels. %s\n",
psnd_strerror (err));
goto error;
}
break;
default:
Con_Printf ("ALSA: desired channels not supported\n");
goto error; goto error;
}
err = psnd_pcm_hw_params_set_channels (pcm, hw, stereo);
} }
switch (rate) { // get rate
case 0: rate = sc->sn.speed;
err = psnd_pcm_hw_params_set_rate_near (pcm, hw, &rate, 0);
while (err < 0)
{
if (rate > 48000)
rate = 48000;
else if (rate > 44100)
rate = 44100; rate = 44100;
err = psnd_pcm_hw_params_set_rate_near (pcm, hw, &rate, 0); else if (rate > 22150)
if (0 <= err) { rate = 22150;
frag_size = 32 * bps; else if (rate > 11025)
} else { rate = 11025;
rate = 22050; else if (rate > 800)
err = psnd_pcm_hw_params_set_rate_near (pcm, hw, &rate, 0); rate = 800;
if (0 <= err) { else
frag_size = 16 * bps; {
} else { Con_Printf (S_ERROR "ALSA: no usable rates. %s\n", psnd_strerror (err));
rate = 11025;
err = psnd_pcm_hw_params_set_rate_near (pcm, hw, &rate,
0);
if (0 <= err) {
frag_size = 8 * bps;
} else {
Con_Printf ("ALSA: no usable rates. %s\n",
psnd_strerror (err));
goto error;
}
}
}
break;
case 11025:
case 22050:
case 44100:
err = psnd_pcm_hw_params_set_rate_near (pcm, hw, &rate, 0);
if (0 > err) {
Con_Printf ("ALSA: desired rate %i not supported. %s\n", rate,
psnd_strerror (err));
goto error;
}
frag_size = 8 * bps * rate / 11025;
break;
default:
Con_Printf ("ALSA: desired rate %i not supported.\n", rate);
goto error; goto error;
}
err = psnd_pcm_hw_params_set_rate_near (pcm, hw, &rate, 0);
} }
if (rate > 11025)
frag_size = 8 * bps * rate / 11025;
else
frag_size = 8 * bps;
err = psnd_pcm_hw_params_set_period_size_near (pcm, hw, &frag_size, 0); err = psnd_pcm_hw_params_set_period_size_near (pcm, hw, &frag_size, 0);
if (0 > err) { if (0 > err) {
Con_Printf ("ALSA: unable to set period size near %i. %s\n", Con_Printf (S_ERROR "ALSA: unable to set period size near %i. %s\n",
(int) frag_size, psnd_strerror (err)); (int) frag_size, psnd_strerror (err));
goto error; goto error;
} }
err = psnd_pcm_hw_params (pcm, hw); err = psnd_pcm_hw_params (pcm, hw);
if (0 > err) { if (0 > err) {
Con_Printf ("ALSA: unable to install hw params: %s\n", Con_Printf (S_ERROR "ALSA: unable to install hw params: %s\n",
psnd_strerror (err)); psnd_strerror (err));
goto error; goto error;
} }
err = psnd_pcm_sw_params_current (pcm, sw); err = psnd_pcm_sw_params_current (pcm, sw);
if (0 > err) { if (0 > err) {
Con_Printf ("ALSA: unable to determine current sw params. %s\n", Con_Printf (S_ERROR "ALSA: unable to determine current sw params. %s\n",
psnd_strerror (err)); psnd_strerror (err));
goto error; goto error;
} }
err = psnd_pcm_sw_params_set_start_threshold (pcm, sw, ~0U); err = psnd_pcm_sw_params_set_start_threshold (pcm, sw, ~0U);
if (0 > err) { if (0 > err) {
Con_Printf ("ALSA: unable to set playback threshold. %s\n", Con_Printf (S_ERROR "ALSA: unable to set playback threshold. %s\n",
psnd_strerror (err)); psnd_strerror (err));
goto error; goto error;
} }
err = psnd_pcm_sw_params_set_stop_threshold (pcm, sw, ~0U); err = psnd_pcm_sw_params_set_stop_threshold (pcm, sw, ~0U);
if (0 > err) { if (0 > err) {
Con_Printf ("ALSA: unable to set playback stop threshold. %s\n", Con_Printf (S_ERROR "ALSA: unable to set playback stop threshold. %s\n",
psnd_strerror (err)); psnd_strerror (err));
goto error; goto error;
} }
err = psnd_pcm_sw_params (pcm, sw); err = psnd_pcm_sw_params (pcm, sw);
if (0 > err) { if (0 > err) {
Con_Printf ("ALSA: unable to install sw params. %s\n", Con_Printf (S_ERROR "ALSA: unable to install sw params. %s\n",
psnd_strerror (err)); psnd_strerror (err));
goto error; goto error;
} }
sc->sn.numchannels = stereo + 1; sc->sn.numchannels = stereo;
sc->sn.samplepos = 0; sc->sn.samplepos = 0;
sc->sn.samplebits = bps; sc->sn.samplebits = bps;