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authorFulup Ar Foll <fulup@iot.bzh>2017-08-16 16:35:20 +0200
committerGitHub <noreply@github.com>2017-08-16 16:35:20 +0200
commitba709f088f5a4718b7096003ab19083af4681155 (patch)
treee2eefecdcfcac5b4193e47d2dc9b7bc96c8ede2a /HAL-afb/HAL_MOST_UNICENS/wrap_volume.c
parent4ca8fd4015479fa758a789d137a693c30fec8cae (diff)
parentb5e786d60f3fda609a7c66bcbf258137d08e040b (diff)
Merge pull request #5 from tjahnk/create_hal_unicens
Introducing HAL MOST UNICENS
Diffstat (limited to 'HAL-afb/HAL_MOST_UNICENS/wrap_volume.c')
-rw-r--r--HAL-afb/HAL_MOST_UNICENS/wrap_volume.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/HAL-afb/HAL_MOST_UNICENS/wrap_volume.c b/HAL-afb/HAL_MOST_UNICENS/wrap_volume.c
new file mode 100644
index 0000000..cf70647
--- /dev/null
+++ b/HAL-afb/HAL_MOST_UNICENS/wrap_volume.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2017, Microchip Technology Inc. and its subsidiaries.
+ * Author Tobias Jahnke
+ *
+ * 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
+#define AFB_BINDING_VERSION 2
+
+#include <string.h>
+#include <time.h>
+#include <assert.h>
+#include <json-c/json.h>
+#include <afb/afb-binding.h>
+
+#include "wrap_volume.h"
+#include "wrap_unicens.h"
+#include "libmostvolume.h"
+
+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);
+ ret = lib_most_volume_service();
+
+ if (ret != 0U) {
+ AFB_ERROR("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_daemon_get_event_loop(), CLOCK_BOOTTIME, &usec);
+ sd_event_add_time( afb_daemon_get_event_loop(), 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 = 0U;
+ 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 * (-1);
+}
+
+extern int wrap_volume_master(int volume) {
+
+ int new_value, ret;
+
+ new_value = wrap_volume_calculate(volume, 100, 255);
+ ret = lib_most_volume_set(LIB_MOST_VOLUME_MASTER, (uint8_t)new_value);
+
+ if (ret != 0) {
+ AFB_ERROR("wrap_volume_master: volume library not ready.");
+ ret = ret * (-1); /* make return value negative */
+ }
+
+ return ret;
+}
+
+extern int wrap_volume_pcm(int *volume_ptr, int volume_sz) {
+
+ const int MAX_PCM_CHANNELS = 6;
+ int cnt, ret;
+ assert(volume_ptr != NULL);
+ assert(volume_sz <= MAX_PCM_CHANNELS);
+
+ for (cnt = 0; cnt < volume_sz; cnt ++) {
+
+ int new_value = wrap_volume_calculate(volume_ptr[cnt], 100, 255);
+ ret = lib_most_volume_set((enum lib_most_volume_channel_t)cnt, (uint8_t)new_value);
+
+ if (ret != 0) {
+ AFB_ERROR("wrap_volume_pcm: volume library not ready.");
+ ret = ret * (-1); /* make return value negative */
+ break;
+ }
+ }
+
+ return ret;
+}