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authorThierry Bultel <thierry.bultel@iot.bzh>2018-06-22 16:35:46 +0200
committerThierry Bultel <thierry.bultel@iot.bzh>2018-06-22 16:35:46 +0200
commitf8a48993f5cb1ea66dff5832ad019a49ff696458 (patch)
treee7922fb116a27747355c79e30cd718524a3442c2 /plugins/alsa/alsa-plug-dmix.c
parentcf7b396370ae1ca0de597a5f8a5baf5012a46b6d (diff)
set the correct number of channels in dmix
The value set was wrong, and attempting to bump to an higher value later seems to be forbidden by the alsalib (led to EINVAL when getting parameters of PCM) Signed-off-by: Thierry Bultel <thierry.bultel@iot.bzh>
Diffstat (limited to 'plugins/alsa/alsa-plug-dmix.c')
-rw-r--r--plugins/alsa/alsa-plug-dmix.c49
1 files changed, 40 insertions, 9 deletions
diff --git a/plugins/alsa/alsa-plug-dmix.c b/plugins/alsa/alsa-plug-dmix.c
index a9f6b7e..df525cb 100644
--- a/plugins/alsa/alsa-plug-dmix.c
+++ b/plugins/alsa/alsa-plug-dmix.c
@@ -31,32 +31,63 @@ PUBLIC AlsaPcmCtlT* AlsaCreateDmix(SoftMixerT *mixer, const char* pcmName, AlsaS
AlsaPcmCtlT *pcmPlug= calloc(1,sizeof(AlsaPcmCtlT));
AlsaSndCtlT *sndSlave=pcmSlave->sndcard;
pcmPlug->cid.cardid=pcmName;
+
int error=0;
+ AFB_ApiInfo(mixer->api, "%s: %s, slave %s, cardid %s\n", __func__, pcmName, pcmSlave->uid, pcmSlave->sndcard->cid.cardid);
+
error += snd_config_top(&dmixConfig);
+ if (error) goto OnErrorExit;
error += snd_config_set_id (dmixConfig, pcmPlug->cid.cardid);
+ if (error) goto OnErrorExit;
error += snd_config_imake_string(&elemConfig, "type", "dmix");
+ if (error) goto OnErrorExit;
error += snd_config_add(dmixConfig, elemConfig);
+ if (error) goto OnErrorExit;
error += snd_config_imake_integer(&elemConfig, "ipc_key", uniqueIpcIndex++);
+ if (error) goto OnErrorExit;
error += snd_config_add(dmixConfig, elemConfig);
if (error) goto OnErrorExit;
error += snd_config_make_compound(&slaveConfig, "slave", 0);
+ if (error) goto OnErrorExit;
error += snd_config_imake_string(&elemConfig, "pcm", sndSlave->cid.cardid);
+ if (error) goto OnErrorExit;
+ error += snd_config_add(slaveConfig, elemConfig);
+ if (error) goto OnErrorExit;
+
if (sndSlave->params->rate) {
- error += snd_config_add(slaveConfig, elemConfig);
error += snd_config_imake_integer(&elemConfig, "rate", sndSlave->params->rate);
+ if (error) goto OnErrorExit;
+ error += snd_config_add(slaveConfig, elemConfig);
+ if (error) goto OnErrorExit;
+ }
+
+ if (sndSlave->params->format) {
+ error += snd_config_imake_string(&elemConfig, "format", sndSlave->params->formatS);
+ if (error) goto OnErrorExit;
+ error += snd_config_add(slaveConfig, elemConfig);
+ if (error) goto OnErrorExit;
}
+
+ /* It is critical to set the right number of channels ... know.
+ * Trying to set another value later leads to silent failure
+ * */
+
+ error += snd_config_imake_integer(&elemConfig, "channels", pcmSlave->ccount);
+ if (error) goto OnErrorExit;
error += snd_config_add(slaveConfig, elemConfig);
if (error) goto OnErrorExit;
- // add leaf into config
+ // add slave leaf into config
error += snd_config_add(dmixConfig, slaveConfig);
if (error) goto OnErrorExit;
-
+
if (open) error = _snd_pcm_dmix_open(&pcmPlug->handle, pcmPlug->cid.cardid, snd_config, dmixConfig, SND_PCM_STREAM_PLAYBACK , SND_PCM_NONBLOCK);
if (error) {
- AFB_ApiError(mixer->api, "AlsaCreateDmix: fail to create Dmix=%s Slave=%s Error=%s", sndSlave->cid.cardid, sndSlave->cid.cardid, snd_strerror(error));
+ AFB_ApiError(mixer->api,
+ "%s: fail to create Dmix=%s Slave=%s Error=%s",
+ __func__, sndSlave->cid.cardid, sndSlave->cid.cardid, snd_strerror(error));
goto OnErrorExit;
}
@@ -64,18 +95,18 @@ PUBLIC AlsaPcmCtlT* AlsaCreateDmix(SoftMixerT *mixer, const char* pcmName, AlsaS
error += snd_config_search(snd_config, "pcm", &pcmConfig);
error += snd_config_add(pcmConfig, dmixConfig);
if (error) {
- AFB_ApiError(mixer->api, "AlsaCreateDmix: fail to add configDMIX=%s", pcmPlug->cid.cardid);
+ AFB_ApiError(mixer->api, "%s: fail to add configDMIX=%s", __func__, pcmPlug->cid.cardid);
goto OnErrorExit;
}
// Debug config & pcm
- //AlsaDumpCtlConfig (mixer, "plug-dmix", dmixConfig, 1);
- AFB_ApiNotice(mixer->api, "AlsaCreateDmix: %s done\n", pcmPlug->cid.cardid);
+ AlsaDumpCtlConfig(mixer, "plug-dmix", dmixConfig, 1);
+ AFB_ApiNotice(mixer->api, "%s: %s done", __func__, pcmPlug->cid.cardid);
return pcmPlug;
OnErrorExit:
AlsaDumpCtlConfig(mixer, "plug-pcm", pcmConfig, 1);
AlsaDumpCtlConfig(mixer, "plug-dmix", dmixConfig, 1);
- AFB_ApiNotice(mixer->api, "AlsaCreateDmix: OnErrorExit\n");
+ AFB_ApiNotice(mixer->api, "%s: FAIL", __func__);
return NULL;
-} \ No newline at end of file
+}