binding: radio: update build system for standalone binding

Radio binding is now standalone so the qmake build scripts need
to be updated to reflect that

Bug-AGL: SPEC-832
Change-Id: Iab9cd5d18536e416d22d91c492ef489159a62d0d
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>

1 files changed, 254 insertions, 0 deletions

diff --git a/binding/radio_impl_rtlsdr.c b/binding/radio_impl_rtlsdr.c
new file mode 100644
index 0000000..4364fd5
--- /dev/null
+++ b/binding/radio_impl_rtlsdr.c
@@ -0,0 +1,254 @@
+/*
+ * Copyright (C) 2017 Konsulko Group
+ *
+ * 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <glib.h>
+
+#include "radio_impl.h"
+#include "radio_output.h"
+#include "rtl_fm.h"
+
+// Structure to describe FM band plans, all values in Hz.
+typedef struct {
+	char *name;
+	uint32_t min;
+	uint32_t max;
+	uint32_t step;
+} fm_band_plan_t;
+
+static fm_band_plan_t known_fm_band_plans[5] = {
+	{ .name = "US", .min = 87900000, .max = 107900000, .step = 200000 },
+	{ .name = "JP", .min = 76100000, .max = 89900000, .step = 100000 },
+	{ .name = "EU", .min = 87500000, .max = 108000000, .step = 50000 },
+	{ .name = "ITU-1", .min = 87500000, .max = 108000000, .step = 50000 },
+	{ .name = "ITU-2", .min = 87900000, .max = 107900000, .step = 50000 }
+};
+
+static unsigned int bandplan;
+static bool present;
+static bool active;
+static uint32_t current_frequency;
+
+static void rtl_output_callback(int16_t *result, int result_len, void *ctx)
+{
+    if(active)
+	    radio_output_write((char*) result, result_len * 2);
+}
+
+int radio_impl_init(void)
+{
+	GKeyFile* conf_file;
+	int conf_file_present = 0;
+	char *value_str;
+
+	if(present)
+		return -1;
+
+	// Load settings from configuration file if it exists
+	conf_file = g_key_file_new();
+	if(conf_file &&
+	   g_key_file_load_from_dirs(conf_file,
+				     "AGL.conf",
+				     (const gchar**) g_get_system_config_dirs(),
+				     NULL,
+				     G_KEY_FILE_KEEP_COMMENTS,
+				     NULL) == TRUE) {
+		conf_file_present = 1;
+
+		// Set band plan if it is specified
+		value_str = g_key_file_get_string(conf_file,
+						  "radio",
+						  "fmbandplan",
+						  NULL);
+		if(value_str) {
+			unsigned int i;
+			for(i = 0;
+			    i < sizeof(known_fm_band_plans) / sizeof(fm_band_plan_t);
+			    i++) {
+				if(!strcasecmp(value_str, known_fm_band_plans[i].name)) {
+					bandplan = i;
+					break;
+				}
+			}
+		}
+	}
+	fprintf(stderr, "Using FM Bandplan: %s\n", known_fm_band_plans[bandplan].name);
+
+	current_frequency = radio_impl_get_min_frequency(BAND_FM);
+	if(rtl_fm_init(current_frequency, 200000, 48000, rtl_output_callback, NULL) < 0) {
+		return -1;
+	}
+
+	if(conf_file_present) {
+		GError *error = NULL;
+		int n;
+
+		// Allow over-riding scanning parameters just in case a demo
+		// setup needs to do so to work reliably.
+		n = g_key_file_get_integer(conf_file,
+					   "radio",
+					   "scan_squelch_level",
+					   &error);
+		//error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND &&
+		//error->code != G_KEY_FILE_ERROR_INVALID_VALUE) {
+		if(!error) {
+			fprintf(stderr, "Scanning squelch level set to %d\n", n);
+			rtl_fm_scan_set_squelch_level(n);
+		}
+
+		error = NULL;
+		n = g_key_file_get_integer(conf_file,
+					   "radio",
+					   "scan_squelch_limit",
+					   &error);
+		if(!error) {
+			fprintf(stderr, "Scanning squelch limit set to %d\n", n);
+			rtl_fm_scan_set_squelch_limit(n);
+		}
+
+		g_key_file_free(conf_file);
+	}
+
+	present = true;
+	return 0;
+}
+
+uint32_t radio_impl_get_frequency(void)
+{
+	return current_frequency;
+}
+
+void radio_impl_set_frequency(uint32_t frequency)
+{
+	if(!present)
+		return;
+
+	if(frequency < known_fm_band_plans[bandplan].min ||
+	   frequency > known_fm_band_plans[bandplan].max)
+		return;
+
+	radio_impl_scan_stop();
+	current_frequency = frequency;
+	rtl_fm_set_freq(frequency);
+}
+
+void radio_impl_set_frequency_callback(radio_freq_callback_t callback,
+				       void *data)
+{
+	rtl_fm_set_freq_callback(callback, data);
+}
+
+radio_band_t radio_impl_get_band(void)
+{
+	return BAND_FM;
+}
+
+void radio_impl_set_band(radio_band_t band)
+{
+	// We only support FM, so do nothing
+}
+
+int radio_impl_band_supported(radio_band_t band)
+{
+	if(band == BAND_FM)
+		return 1;
+	return 0;
+}
+
+uint32_t radio_impl_get_min_frequency(radio_band_t band)
+{
+	return known_fm_band_plans[bandplan].min;
+}
+
+uint32_t radio_impl_get_max_frequency(radio_band_t band)
+{
+	return known_fm_band_plans[bandplan].max;
+}
+
+uint32_t radio_impl_get_frequency_step(radio_band_t band)
+{
+	uint32_t ret = 0;
+
+	switch (band) {
+	case BAND_AM:
+		ret = 1000; // 1 kHz
+		break;
+	case BAND_FM:
+		ret = known_fm_band_plans[bandplan].step;
+		break;
+	default:
+		break;
+	}
+	return ret;
+}
+
+void radio_impl_start(void)
+{
+	if(!present)
+		return;
+
+	if(!active) {
+		if(radio_output_start() != 0)
+			return;
+
+		rtl_fm_start();
+		active = true;
+	}
+}
+
+void radio_impl_stop(void)
+{
+	if(!present)
+		return;
+
+	if(active) {
+		active = false;
+		radio_output_stop();
+		rtl_fm_stop();
+
+	}
+}
+
+void radio_impl_scan_start(radio_scan_direction_t direction,
+			   radio_scan_callback_t callback,
+			   void *data)
+{
+	rtl_fm_scan_start(direction == SCAN_FORWARD ? 0 : 1,
+			  callback,
+			  data,
+			  radio_impl_get_frequency_step(BAND_FM),
+			  radio_impl_get_min_frequency(BAND_FM),
+			  radio_impl_get_max_frequency(BAND_FM));
+}
+
+void radio_impl_scan_stop(void)
+{
+	rtl_fm_scan_stop();
+}
+
+radio_stereo_mode_t radio_impl_get_stereo_mode(void)
+{
+	return STEREO;
+}
+
+void radio_impl_set_stereo_mode(radio_stereo_mode_t mode)
+{
+	// We only support stereo, so do nothing
+}