Merge pull request #5 from tjahnk/create_hal_unicens

Introducing HAL MOST UNICENS

1 files changed, 173 insertions, 0 deletions

diff --git a/HAL-afb/HAL_MOST_UNICENS/hal_most_unicens.c b/HAL-afb/HAL_MOST_UNICENS/hal_most_unicens.c
new file mode 100644
index 0000000..4405e61
--- /dev/null
+++ b/HAL-afb/HAL_MOST_UNICENS/hal_most_unicens.c
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2017, Microchip Technology Inc. and its subsidiaries.
+ * Author Tobias Jahnke
+ *
+ * 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 
+#include <string.h>
+#include "hal-interface.h"
+#include "audio-common.h"
+#include "wrap-json.h"
+#include "wrap_unicens.h"
+#include "wrap_volume.h"
+
+#ifndef UCS2_CFG_PATH
+# define UCS2_CFG_PATH "/home/agluser/DEVELOPMENT/AGL/BINDING/unicens2-binding/data"
+#endif
+
+#define ALSA_CARD_NAME    "Microchip MOST:1"
+#define PCM_MAX_CHANNELS  6
+
+static int master_volume;
+static json_bool master_switch;
+static int pcm_volume[PCM_MAX_CHANNELS];
+
+void unicens_master_vol_cb(halCtlsTagT tag, alsaHalCtlMapT *control, void* handle,  json_object *j_obj) {
+
+    const char *j_str = json_object_to_json_string(j_obj);
+    
+    if (wrap_json_unpack(j_obj, "[i!]", &master_volume) == 0) {
+        AFB_NOTICE("master_volume: %s, value=%d", j_str, master_volume);
+        wrap_volume_master(master_volume);
+    }
+    else {
+        AFB_NOTICE("master_volume: INVALID STRING %s", j_str);
+    } 
+}
+
+void unicens_master_switch_cb(halCtlsTagT tag, alsaHalCtlMapT *control, void* handle,  json_object *j_obj) {
+
+    const char *j_str = json_object_to_json_string(j_obj);
+    
+    if (wrap_json_unpack(j_obj, "[b!]", &master_switch) == 0) {
+        AFB_NOTICE("master_switch: %s, value=%d", j_str, master_switch);
+    }
+    else {
+        AFB_NOTICE("master_switch: INVALID STRING %s", j_str);
+    }    
+}
+
+void unicens_pcm_vol_cb(halCtlsTagT tag, alsaHalCtlMapT *control, void* handle,  json_object *j_obj) {
+
+    const char *j_str = json_object_to_json_string(j_obj);
+    
+    if (wrap_json_unpack(j_obj, "[iiiiii!]", &pcm_volume[0], &pcm_volume[1], &pcm_volume[2], &pcm_volume[3],
+                                             &pcm_volume[4], &pcm_volume[5]) == 0) {
+        AFB_NOTICE("pcm_vol: %s", j_str);
+        wrap_volume_pcm(pcm_volume, PCM_MAX_CHANNELS/*array size*/);
+    }
+    else {
+        AFB_NOTICE("pcm_vol: INVALID STRING %s", j_str);
+    }
+}
+
+/* declare ALSA mixer controls */
+STATIC alsaHalMapT  alsaHalMap[]= { 
+  { .tag=Master_Playback_Volume, .cb={.callback=unicens_master_vol_cb, .handle=&master_volume}, .info="Sets master playback volume",
+    .ctl={.numid=1, .type=SND_CTL_ELEM_TYPE_INTEGER, .count=1, .minval=0, .maxval=100, .step=1, .value=50, .name="Master Playback Volume"}   
+  },
+  /*{ .tag=Master_OnOff_Switch, .cb={.callback=unicens_master_switch_cb, .handle=&master_switch}, .info="Sets master playback switch",
+    .ctl={.numid=2, .type=SND_CTL_ELEM_TYPE_BOOLEAN, .count=1, .minval=0, .maxval=1, .step=1, .value=1, .name="Master Playback Switch"}   
+  },*/
+  { .tag=PCM_Playback_Volume, .cb={.callback=unicens_pcm_vol_cb, .handle=&pcm_volume}, .info="Sets PCM playback volume",
+    .ctl={.numid=3, .type=SND_CTL_ELEM_TYPE_INTEGER, .count=6, .minval=0, .maxval=100, .step=1, .value=100, .name="PCM Playback Volume"}   
+  },
+  { .tag=EndHalCrlTag}              /* marker for end of the array */
+} ;
+
+/* HAL sound card mapping info */
+STATIC alsaHalSndCardT alsaHalSndCard  = {
+    .name  = ALSA_CARD_NAME,   /*  WARNING: name MUST match with 'aplay -l' */
+    .info  = "HAL for MICROCHIP MOST sound card controlled by UNICENS binding",
+    .ctls  = alsaHalMap,
+    .volumeCB = NULL,               /* use default volume normalization function */
+};
+
+/* initializes ALSA sound card, UNICENS API */
+STATIC int unicens_service_init() {
+    int err = 0;
+    char *config_file = NULL;
+    AFB_NOTICE("Initializing HAL-MOST-UNICENS-BINDING");
+    
+    err = halServiceInit(afbBindingV2.api, &alsaHalSndCard);
+    if (err) {
+        AFB_ERROR("Cannot initialize ALSA soundcard.");
+        goto OnErrorExit;
+    }    
+    
+    err= afb_daemon_require_api("UNICENS", 1);
+    if (err) {
+        AFB_ERROR("Failed to access UNICENS API");
+        goto OnErrorExit;
+    }
+    
+    err = wrap_ucs_getconfig_sync(UCS2_CFG_PATH, &config_file);
+    if (err || (config_file == NULL)) {
+        AFB_ERROR("Failed to retrieve configuration");
+        goto OnErrorExit;
+    }
+    else {
+        AFB_NOTICE("Found configuration: %s", config_file);
+    }
+    
+    err = wrap_ucs_subscribe_sync();
+    if (err) {
+        AFB_ERROR("Failed to subscribe to UNICENS binding");
+        goto OnErrorExit;
+    }
+    
+    err = wrap_ucs_initialize_sync(config_file);
+    free(config_file);
+    config_file = NULL;
+    
+    if (err) {
+        AFB_ERROR("Failed to initialize UNICENS binding");
+        goto OnErrorExit;
+    }
+    
+    err = wrap_volume_init();
+    if (err) {
+        AFB_ERROR("Failed to initialize wrapper for volume library");
+        goto OnErrorExit;
+    }
+    
+OnErrorExit:
+    AFB_NOTICE("Initializing HAL-MOST-UNICENS-BINDING done..");
+    return err;
+}
+
+// This receive all event this binding subscribe to 
+PUBLIC void unicens_event_cb(const char *evtname, json_object *j_event) {
+    
+    if (strncmp(evtname, "alsacore/", 9) == 0) {
+        halServiceEvent(evtname, j_event);
+        return;
+    }
+    
+    if (strncmp(evtname, "UNICENS/", 8) == 0) {
+        AFB_NOTICE("unicens_event_cb: evtname=%s [msg=%s]", evtname, json_object_get_string(j_event));
+        return;
+    }
+    
+    AFB_NOTICE("unicens_event_cb: UNHANDLED EVENT, evtname=%s [msg=%s]", evtname, json_object_get_string(j_event));
+}
+
+/* API prefix should be unique for each snd card */
+PUBLIC const struct afb_binding_v2 afbBindingV2 = {
+    .api     = "hal-most-unicens",
+    .init    = unicens_service_init,
+    .verbs   = halServiceApi,
+    .onevent = unicens_event_cb,
+};