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-rw-r--r--plugins/alsa/alsa-api-sndloops.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/plugins/alsa/alsa-api-sndloops.c b/plugins/alsa/alsa-api-sndloops.c
new file mode 100644
index 0000000..5599ae0
--- /dev/null
+++ b/plugins/alsa/alsa-api-sndloops.c
@@ -0,0 +1,135 @@
+/*
+ * 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 ProcessOneSubdev(CtlSourceT *source, AlsaSndLoopT *loop, json_object *subdevJ, AlsaPcmInfoT *subdev) {
+
+ int error = wrap_json_unpack(subdevJ, "{si,si !}", "subdev", &subdev->subdev, "numid", &subdev->numid);
+ if (error) {
+ AFB_ApiError(source->api, "ProcessOneSubdev: loop=%s missing (uid|subdev|numid) json=%s", loop->uid, json_object_get_string(subdevJ));
+ goto OnErrorExit;
+ }
+
+ // create a fake uid and complete subdev info from loop handle
+ char subuid[30];
+ snprintf(subuid,sizeof(subuid),"loop:/%i/%i", subdev->subdev,subdev->numid);
+ subdev->uid = strdup(subuid);
+ subdev->device = loop->capture; // Fulup: with alsaloop softmixer only use capture device (playback is used by applications)
+ subdev->devpath = loop->devpath;
+ subdev->cardid = NULL; // force AlsaByPathDevId to rebuild a new one for each subdev
+ subdev->cardidx = loop->cardidx;
+
+ // check if card exist
+ error = AlsaByPathDevid(source, subdev);
+ if (error) {
+ AFB_ApiError(source->api, "ProcessOneSubdev: loop=%s fail to open subdev=%s", loop->uid, json_object_get_string(subdevJ));
+ goto OnErrorExit;
+ }
+
+ return 0;
+
+OnErrorExit:
+ return -1;
+}
+
+STATIC int ProcessOneLoop(CtlSourceT *source, json_object *loopJ, AlsaSndLoopT *loop) {
+ json_object *subdevsJ=NULL, *devicesJ=NULL;
+ int error;
+
+ error = wrap_json_unpack(loopJ, "{ss,s?s,s?s,s?i,s?o,so}", "uid",&loop->uid, "devpath",&loop->devpath, "cardid",&loop->cardid
+ , "cardidx",&loop->cardidx, "devices",&devicesJ, "subdevs",&subdevsJ);
+ if (error || !loop->uid || !subdevsJ || (!loop->devpath && !loop->cardid && loop->cardidx)) {
+ AFB_ApiNotice(source->api, "ProcessOneLoop missing 'uid|devpath|cardid|cardidx|devices|subdevs' loop=%s", json_object_get_string(loopJ));
+ goto OnErrorExit;
+ }
+
+ // make sure useful information will not be removed
+ loop->uid=strdup(loop->uid);
+ if (loop->cardid) loop->cardid=strdup(loop->cardid);
+ if (loop->devpath) loop->cardid=strdup(loop->devpath);
+
+ // Default devices is payback=0 capture=1
+ if (!devicesJ) {
+ loop->playback=0;
+ loop->capture=1;
+ } else {
+ error = wrap_json_unpack(devicesJ, "{si,si}", "capture",&loop->capture, "playback", &loop->playback);
+ if (error) {
+ AFB_ApiNotice(source->api, "ProcessOneLoop=%s missing 'capture|playback' devices=%s", loop->uid, json_object_get_string(devicesJ));
+ goto OnErrorExit;
+ }
+ }
+
+ switch (json_object_get_type(subdevsJ)) {
+ case json_type_object:
+ loop->scount = 1;
+ loop->subdevs = calloc(loop->scount+1, sizeof (AlsaPcmInfoT));
+ error = ProcessOneSubdev(source, loop, subdevsJ, &loop->subdevs[0]);
+ if (error) goto OnErrorExit;
+ break;
+ case json_type_array:
+ loop->scount = (int)json_object_array_length(subdevsJ);
+ loop->subdevs = calloc(loop->scount+1, sizeof (AlsaPcmInfoT));
+ for (int idx = 0; idx < loop->scount; idx++) {
+ json_object *subdevJ = json_object_array_get_idx(subdevsJ, idx);
+ error = ProcessOneSubdev(source, loop, subdevJ, &loop->subdevs[idx]);
+ if (error) goto OnErrorExit;
+ }
+ break;
+ default:
+ AFB_ApiError(source->api, "L2C:ProcessOneLoop=%s invalid subdevs= %s", loop->uid, json_object_get_string(subdevsJ));
+ goto OnErrorExit;
+ }
+
+ return 0;
+
+OnErrorExit:
+ return -1;
+}
+
+CTLP_LUA2C(snd_loops, source, argsJ, responseJ) {
+ int error;
+ AlsaSndLoopT *sndLoop = calloc (1, sizeof(AlsaSndLoopT));
+
+ if (json_object_get_type(argsJ) != json_type_object) {
+ AFB_ApiError(source->api, "L2C:sndloops: invalid object type= %s", json_object_get_string(argsJ));
+ goto OnErrorExit;
+ }
+
+ error = ProcessOneLoop(source, argsJ, sndLoop);
+ if (error) {
+ AFB_ApiError(source->api, "L2C:sndloops: invalid object= %s", json_object_get_string(argsJ));
+ goto OnErrorExit;
+ }
+
+ // register routed into global softmixer handle
+ Softmixer->loopCtl = sndLoop;
+
+
+ return 0;
+
+OnErrorExit:
+ return -1;
+} \ No newline at end of file