Move to Dynamic Mixer API (work in progress)

1 files changed, 111 insertions, 0 deletions

diff --git a/plugins/alsa/alsa-api-sink.c b/plugins/alsa/alsa-api-sink.c
new file mode 100644
index 0000000..ab32276
--- /dev/null
+++ b/plugins/alsa/alsa-api-sink.c
@@ -0,0 +1,111 @@
+/*
+ * 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"
+
+PUBLIC AlsaPcmHwInfoT *ApiSinkGetParamsByZone(SoftMixerT *mixer, const char *target) {
+
+    AlsaSndZoneT *zone = ApiZoneGetByUid(mixer, target);
+    if (!zone || !zone->sinks) return NULL;
+
+    // use 1st channel to find attached sound card.
+    const char *channel = zone->sinks[0]->uid;
+
+    // search for channel uid into mixer sinks
+    for (int idx = 0; mixer->sinks[idx]; idx++) {
+        for (int jdx = 0; jdx < mixer->sinks[idx]->ccount; jdx++) {
+            if (mixer->sinks[idx]->channels[jdx]->uid && !strcasecmp(channel, mixer->sinks[idx]->channels[jdx]->uid)) {
+                return mixer->sinks[idx]->sndcard->params;
+            }
+        }
+    }
+    return NULL;
+}
+
+PUBLIC int ApiSinkAttach(SoftMixerT *mixer, AFB_ReqT request, const char *uid, json_object * argsJ) {
+
+    int index;
+    for (index = 0; index < mixer->max.sinks; index++) {
+        if (!mixer->sinks[index]) break;
+    }
+
+    if (index == mixer->max.sinks) {
+        AFB_ReqFailF(request, "too-small", "mixer=%s max sink=%d argsJ= %s", mixer->uid, mixer->max.sinks, json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+
+    switch (json_object_get_type(argsJ)) {
+            long count;
+            char *dmixUid;
+            AlsaPcmCtlT* dmixConfig;
+
+        case json_type_object:
+            mixer->sinks[index] = ApiPcmAttachOne(mixer, uid, SND_PCM_STREAM_PLAYBACK, argsJ);
+            if (!mixer->sinks[index]) {
+                AFB_ReqFailF(request, "invalid-syntax", "mixer=%s invalid sink= %s", mixer->uid, json_object_get_string(argsJ));
+                goto OnErrorExit;
+            }
+
+            // move from hardware to DMIX attach to sndcard
+            (void) asprintf(&dmixUid, "dmix-%s", mixer->sinks[index]->uid);
+
+            dmixConfig = AlsaCreateDmix(mixer, dmixUid, mixer->sinks[index], 0);
+            if (!dmixConfig) {
+                AFB_ReqFailF(request, "internal-error", "mixer=%s sink=%s fail to create DMIX config", mixer->uid, mixer->sinks[index]->uid);
+                goto OnErrorExit;
+            }
+
+            break;
+
+        case json_type_array:
+            count = json_object_array_length(argsJ);
+            if (count > (mixer->max.sinks - count)) {
+                AFB_ReqFailF(request, "too-small", "mixer=%s max sink=%d argsJ= %s", mixer->uid, mixer->max.sinks, json_object_get_string(argsJ));
+                goto OnErrorExit;
+            }
+
+            for (int idx = 0; idx < count; idx++) {
+                json_object *sinkJ = json_object_array_get_idx(argsJ, idx);
+                mixer->sinks[index + idx] = ApiPcmAttachOne(mixer, uid, SND_PCM_STREAM_PLAYBACK, sinkJ);
+                if (!mixer->sinks[index + idx]) {
+                    AFB_ReqFailF(request, "invalid-syntax", "mixer=%s invalid sink= %s", mixer->uid, json_object_get_string(sinkJ));
+                    goto OnErrorExit;
+                }
+
+                // move from hardware to DMIX attach to sndcard
+                (void) asprintf(&dmixUid, "dmix-%s", mixer->sinks[index]->uid);
+
+                dmixConfig = AlsaCreateDmix(mixer, dmixUid, mixer->sinks[index], 0);
+                if (!dmixConfig) {
+                    AFB_ReqFailF(request, "internal-error", "mixer=%s sink=%s fail to create DMIX config", mixer->uid, mixer->sinks[index]->uid);
+                    goto OnErrorExit;
+                }
+            }
+            break;
+        default:
+            AFB_ReqFailF(request, "invalid-syntax", "mixer=%s sinks invalid argsJ= %s", mixer->uid, json_object_get_string(argsJ));
+            goto OnErrorExit;
+    }
+
+    return 0;
+
+OnErrorExit:
+    return -1;
+}
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