1 files changed, 137 insertions, 0 deletions
diff --git a/plugin/wrap_volume.c b/plugin/wrap_volume.c
new file mode 100644
index 0000000..61b752f
--- /dev/null
+++ b/plugin/wrap_volume.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2018, Microchip Technology Inc. and its subsidiaries, "IoT.bzh".
+ * Author Tobias Jahnke
+ * Author Jonathan Aillet
+ * Contrib Fulup Ar Foll
+ *
+ * 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 <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include <time.h>
+#include <assert.h>
+
+#include <wrap-json.h>
+
+#include <ctl-plugin.h>
+
+#include "wrap_volume.h"
+#include "wrap_unicens.h"
+
+#include "libmostvolume.h"
+
+#define MAX_PCM_CHANNELS 6
+
+static int wrap_volume_service_timeout_cb(sd_event_source* source,
+					  uint64_t timer __attribute__((__unused__)),
+					  void *userdata __attribute__((__unused__)))
+{
+	uint8_t ret;
+
+	sd_event_source_unref(source);
+
+	if((ret = lib_most_volume_service()))
+		AFB_ApiError(unicensHalApiHandle, "lib_most_volume_service returns %d", ret);
+
+	return 0;
+}
+
+static void wrap_volume_service_cb(uint16_t timeout)
+{
+	uint64_t usec;
+
+	sd_event_now(AFB_GetEventLoop(unicensHalApiHandle), CLOCK_BOOTTIME, &usec);
+
+	sd_event_add_time(AFB_GetEventLoop(unicensHalApiHandle),
+			  NULL,
+			  CLOCK_MONOTONIC,
+			  usec + (timeout*1000),
+			  250,
+			  wrap_volume_service_timeout_cb,
+			  NULL);
+}
+
+/* Retrieves a new value adapted to a new maximum value. Minimum value is
+ * always zero. */
+static int wrap_volume_calculate(int value, int max_old, int max_new)
+{
+	if(value > max_old)
+		value = max_old;
+
+	value = (value * max_new) / max_old; /* calculate range: 0..255 */
+	assert(value <= max_new);
+
+	return value;
+}
+
+extern int wrap_volume_init(void)
+{
+	uint8_t ret = 0;
+
+	lib_most_volume_init_t mv_init;
+
+	mv_init.writei2c_cb = &wrap_ucs_i2cwrite;
+	mv_init.service_cb = wrap_volume_service_cb;
+
+	ret = lib_most_volume_init(&mv_init);
+
+	return -ret;
+}
+
+extern int wrap_volume_master(AFB_ApiT apiHandle, int volume)
+{
+	int ret;
+
+	if((ret = lib_most_volume_set(LIB_MOST_VOLUME_MASTER,
+				     (uint8_t) wrap_volume_calculate(volume, 100, 255)))) {
+		AFB_ApiError(apiHandle, "%s: volume library not ready.", __func__);
+	}
+
+	return -ret;
+}
+
+extern int wrap_volume_pcm(AFB_ApiT apiHandle, int *volume_ptr, int volume_sz)
+{
+	int cnt, new_value, ret = 0;
+
+	assert(volume_ptr != NULL);
+	assert(volume_sz <= MAX_PCM_CHANNELS);
+
+	for(cnt = 0; cnt < volume_sz; cnt ++) {
+		new_value = wrap_volume_calculate(volume_ptr[cnt], 100, 255);
+
+		if((ret = lib_most_volume_set((enum lib_most_volume_channel_t) cnt, (uint8_t) new_value))) {
+			AFB_ApiError(apiHandle, "%s: volume library not ready.", __func__);
+			break;
+		}
+	}
+
+	return -ret;
+}
+
+extern int wrap_volume_node_avail(AFB_ApiT apiHandle, int node, int available)
+{
+	int ret;
+
+	if((ret = lib_most_volume_node_available((uint16_t) node, (uint8_t) available)))
+		AFB_ApiError(apiHandle, "%s: volume library not ready.", __func__);
+
+	return -ret;
+}
+