Initial version with dynamic APIs

1 files changed, 156 insertions, 0 deletions

diff --git a/plugins/alsa/alsa-api-zones.c b/plugins/alsa/alsa-api-zones.c
new file mode 100644
index 0000000..de834df
--- /dev/null
+++ b/plugins/alsa/alsa-api-zones.c
@@ -0,0 +1,156 @@
+/*
+ * 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"
+#include <string.h>
+
+// Fulup need to be cleanup with new controller version
+extern Lua2cWrapperT Lua2cWrap;
+
+STATIC int ProcessOneChannel(CtlSourceT *source, const char* uid, json_object *channelJ, AlsaPcmChannels *channel) {
+    const char*channelUid;
+
+    int error = wrap_json_unpack(channelJ, "{ss,si,s?i !}", "target", &channelUid, "channel", &channel->port);
+    if (error) goto OnErrorExit;
+
+    channel->uid = strdup(channelUid);
+    return 0;
+
+OnErrorExit:
+    AFB_ApiError(source->api, "ProcessOneChannel: zone=%s channel: missing (target||channel) json=%s", uid, json_object_get_string(channelJ));
+    return -1;
+}
+
+STATIC int ProcessOneZone(CtlSourceT *source, json_object *zoneJ, AlsaSndZoneT *zone) {
+    json_object *mappingJ;
+    size_t count;
+    const char* streamType;
+    int error;
+
+    error = wrap_json_unpack(zoneJ, "{ss,s?s,so !}"
+            , "uid", &zone->uid
+            , "type", &streamType
+            , "mapping", &mappingJ
+            );
+    if (error) {
+        AFB_ApiNotice(source->api, "ProcessOneZone missing 'uid|type|mapping' zone=%s", json_object_get_string(zoneJ));
+        goto OnErrorExit;
+    }
+
+    if (!streamType) zone->type = SND_PCM_STREAM_PLAYBACK;
+    else {
+        if (!strcasecmp(streamType, "capture")) zone->type = SND_PCM_STREAM_CAPTURE;
+        else if (!strcasecmp(streamType, "playback")) zone->type = SND_PCM_STREAM_PLAYBACK;
+        else {
+            AFB_ApiError(source->api, "ProcessOneZone:%s invalid stream type !(playback||capture) json=%s", zone->uid, json_object_get_string(zoneJ));
+            goto OnErrorExit;
+        }
+    }
+
+    // make sure remain valid even when json object is removed
+    zone->uid = strdup(zone->uid);
+
+    switch (json_object_get_type(mappingJ)) {
+        case json_type_object:
+            count = 1;
+            zone->channels = calloc(count + 1, sizeof (AlsaPcmChannels));
+            error = ProcessOneChannel(source, zone->uid, mappingJ, &zone->channels[0]);
+            if (error) goto OnErrorExit;
+            break;
+        case json_type_array:
+            count = json_object_array_length(mappingJ);
+            zone->channels = calloc(count + 1, sizeof (AlsaPcmChannels));
+            for (int idx = 0; idx < count; idx++) {
+                json_object *channelJ = json_object_array_get_idx(mappingJ, idx);
+                error = ProcessOneChannel(source, zone->uid, channelJ, &zone->channels[idx]);
+                if (error) goto OnErrorExit;
+            }
+            break;
+        default:
+            AFB_ApiError(source->api, "ProcessOneZone:%s invalid mapping=%s", zone->uid, json_object_get_string(mappingJ));
+            goto OnErrorExit;
+    }
+
+    return 0;
+
+OnErrorExit:
+    return -1;
+}
+
+PUBLIC int SndZones(CtlSourceT *source, json_object *argsJ) {
+    SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
+    AlsaSndZoneT *zones=NULL;
+    int error;
+    size_t count;
+
+    assert(mixerHandle);
+
+    if (mixerHandle->routes) {
+        AFB_ApiError(source->api, "SndZones: mixer=%s Zones already registered %s", mixerHandle->uid, json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+
+    switch (json_object_get_type(argsJ)) {
+        case json_type_object:
+            count = 1;
+            zones = calloc(count + 1, sizeof (AlsaSndZoneT));
+            error = ProcessOneZone(source, argsJ, &zones[0]);
+            if (error) {
+                AFB_ApiError(source->api, "SndZones: mixer=%s invalid zone= %s", mixerHandle->uid, json_object_get_string(argsJ));
+                goto OnErrorExit;
+            }
+            break;
+
+        case json_type_array:
+            count = json_object_array_length(argsJ);
+            zones = calloc(count + 1, sizeof (AlsaSndZoneT));
+            for (int idx = 0; idx < count; idx++) {
+                json_object *sndZoneJ = json_object_array_get_idx(argsJ, idx);
+                error = ProcessOneZone(source, sndZoneJ, &zones[idx]);
+                if (error) {
+                    AFB_ApiError(source->api, "SndZones: mixer=%s invalid zone= %s", mixerHandle->uid, json_object_get_string(sndZoneJ));
+                    goto OnErrorExit;
+                }
+            }
+            break;
+        default:
+            AFB_ApiError(source->api, "SndZones: mixer=%s invalid argsJ=  %s", mixerHandle->uid, json_object_get_string(argsJ));
+            goto OnErrorExit;
+    }
+
+    // register routed into global softmixer handle
+    mixerHandle->routes= calloc(count + 1, sizeof (AlsaPcmInfoT*));
+
+    // instantiate one route PCM per zone with multi plugin as slave
+    for (int idx = 0; zones[idx].uid != NULL; idx++) {
+        mixerHandle->routes[idx] = AlsaCreateRoute(source, &zones[idx], 0);
+        if (!mixerHandle->routes[idx]) {
+            AFB_ApiNotice(source->api, "SndZones: mixer=%s fail to create route zone=%s", mixerHandle->uid, zones[idx].uid);
+            goto OnErrorExit;
+        }
+    }
+    
+    free (zones);
+    return 0;
+
+OnErrorExit:
+    if (zones) free(zones);
+    return -1;
+}
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