diff options
Diffstat (limited to 'binding/radio_impl_rtlsdr.c')
| -rw-r--r-- | binding/radio_impl_rtlsdr.c | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/binding/radio_impl_rtlsdr.c b/binding/radio_impl_rtlsdr.c deleted file mode 100644 index 4364fd5..0000000 --- a/binding/radio_impl_rtlsdr.c +++ /dev/null @@ -1,254 +0,0 @@ -/* - * 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 -} |