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-rw-r--r--plugin/wrap_volume.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/plugin/wrap_volume.c b/plugin/wrap_volume.c
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+++ 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;
+}
+