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