From ca0965cae3ad129e495fd4615ebeb7c11b413a2b Mon Sep 17 00:00:00 2001
From: Fulup Ar Foll <fulup@iot.bzh>
Date: Sun, 13 May 2018 01:22:24 +0200
Subject: Initial version with softvol,Route,Multi,Dmix

---
 plugins/alsa/alsa-plug-multi.c | 105 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 plugins/alsa/alsa-plug-multi.c

(limited to 'plugins/alsa/alsa-plug-multi.c')

diff --git a/plugins/alsa/alsa-plug-multi.c b/plugins/alsa/alsa-plug-multi.c
new file mode 100644
index 0000000..d6ef46e
--- /dev/null
+++ b/plugins/alsa/alsa-plug-multi.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Fulup Ar Foll <fulup@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#define _GNU_SOURCE  // needed for vasprintf
+
+#include "alsa-softmixer.h"
+
+ALSA_PLUG_PROTO(multi);
+
+PUBLIC AlsaPcmInfoT* AlsaCreateMulti(CtlSourceT *source, const char *pcmUid) {
+
+    snd_config_t *multiConfig, *elemConfig, *slavesConfig, *slaveConfig, *bindingsConfig, *bindingConfig, *pcmConfig;
+    int error = 0, channelIdx=0;
+    AlsaPcmInfoT *pcmPlug = calloc(1, sizeof (AlsaPcmInfoT));
+    pcmPlug->uid   = pcmUid;
+    pcmPlug->cardid = pcmUid;
+    
+    AlsaPcmInfoT* pcmSlaves=Softmixer->sndcardCtl;
+        if (!Softmixer->sndcardCtl) {
+        AFB_ApiError(source->api, "AlsaCreateMulti: No Sound Card find [should register snd_cards first]");
+        goto OnErrorExit;
+    }
+
+    // refresh global alsalib config and create PCM top config
+    snd_config_update();
+    error += snd_config_top(&multiConfig);
+    error += snd_config_set_id (multiConfig, pcmPlug->cardid);
+    error += snd_config_imake_string(&elemConfig, "type", "multi");
+    error += snd_config_add(multiConfig, elemConfig);
+    if (error) goto OnErrorExit;
+
+    error += snd_config_make_compound(&slavesConfig, "slaves", 0);
+    error += snd_config_make_compound(&bindingsConfig, "bindings", 0);
+
+    // loop on sound card to include into multi
+    for (int idx = 0; pcmSlaves[idx].uid != NULL; idx++) {
+        AlsaPcmInfoT* sndcard=&pcmSlaves[idx];
+        AlsaPcmChannels *channels = sndcard->channels;
+                
+        for (channelIdx=0; channels[channelIdx].uid != NULL; channelIdx++) {
+            char idxS[4]; // 999 channel should be more than enough
+            snprintf (idxS, sizeof(idxS), "%d", pcmPlug->ccount++);
+            // multi does not support to name channels        
+            error += snd_config_make_compound(&bindingConfig,idxS, 0);
+            error += snd_config_imake_string(&elemConfig, "slave", sndcard->cardid);
+            error += snd_config_add(bindingConfig, elemConfig);
+            error += snd_config_imake_integer(&elemConfig,"channel", channelIdx);
+            error += snd_config_add(bindingConfig, elemConfig);
+            error += snd_config_add(bindingsConfig, bindingConfig);
+        }
+        
+        error += snd_config_make_compound(&slaveConfig, sndcard->uid, 0);
+        error += snd_config_imake_string(&elemConfig, "pcm", sndcard->cardid);
+        error += snd_config_add(slaveConfig, elemConfig);
+        error += snd_config_imake_integer(&elemConfig, "channels", channelIdx);
+        error += snd_config_add(slaveConfig, elemConfig);
+        error += snd_config_add(slavesConfig, slaveConfig);       
+    }
+    
+    error += snd_config_add(multiConfig, slavesConfig);
+    error += snd_config_add(multiConfig, bindingsConfig);
+    if (error) goto OnErrorExit;
+
+    // update top config to access previous plugin PCM
+    snd_config_update();
+
+    error = _snd_pcm_multi_open(&pcmPlug->handle, pcmUid, snd_config, multiConfig, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
+    if (error) {
+        AFB_ApiError(source->api, "AlsaCreateMulti: fail to create Plug=%s Error=%s", pcmPlug->cardid, snd_strerror(error));
+        goto OnErrorExit;
+    }
+
+    error += snd_config_search(snd_config, "pcm", &pcmConfig);
+    error += snd_config_add(pcmConfig, multiConfig);
+    if (error) {
+        AFB_ApiError(source->api, "AlsaCreateDmix: fail to add configDMIX=%s", pcmPlug->cardid);
+        goto OnErrorExit;
+    }
+
+    // Debug config & pcm
+    //AlsaDumpCtlConfig(source, "plug-multi", multiConfig, 1);
+    //AlsaDumpPcmInfo(source, pcmPlug->handle, "pcmPlug->handle");
+    AFB_ApiNotice(source->api, "AlsaCreateMulti: %s done\n", pcmPlug->cardid);
+    return pcmPlug;
+
+OnErrorExit:
+    AlsaDumpCtlConfig(source, "plug-multi", multiConfig, 1);
+    AFB_ApiNotice(source->api, "AlsaCreateMulti: OnErrorExit\n");
+    return NULL;
+}
\ No newline at end of file
-- 
cgit 1.2.3-korg