diff options
Diffstat (limited to 'binding/radio_impl_rtlsdr.c')
| -rw-r--r-- | binding/radio_impl_rtlsdr.c | 161 |
1 files changed, 89 insertions, 72 deletions
diff --git a/binding/radio_impl_rtlsdr.c b/binding/radio_impl_rtlsdr.c index 62ec623..2087d10 100644 --- a/binding/radio_impl_rtlsdr.c +++ b/binding/radio_impl_rtlsdr.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2017,2018 Konsulko Group + * Copyright (C) 2017,2018,2020 Konsulko Group * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -57,6 +57,7 @@ static int helper_in; static int helper_out; static pthread_mutex_t helper_mutex = PTHREAD_MUTEX_INITIALIZER; static bool present; +static bool initialized; static bool active; static bool scanning; static uint32_t current_frequency; @@ -128,16 +129,89 @@ static pid_t popen2(char *command, int *in_fd, int *out_fd) return pid; } -static int rtlsdr_init(void) +static int rtlsdr_probe(void) { - GKeyFile *conf_file; - char *value_str; char *rootdir; char *helper_path; if(present) return 0; + rootdir = getenv("AFM_APP_INSTALL_DIR"); + if(!rootdir) + return -1; + + // Run helper to detect adapter + helper_path = malloc(HELPER_MAX); + if(!helper_path) + return -ENOMEM; + if(snprintf(helper_path, HELPER_MAX, "%s/bin/%s --detect", rootdir, HELPER_NAME) == HELPER_MAX) { + AFB_API_ERROR(afbBindingV3root, "Could not create command for \"%s --detect\"", HELPER_NAME); + return -EINVAL; + } + if(system(helper_path) != 0) { + free(helper_path); + return -1; + } + + present = true; + return 0; +} + +static int rtlsdr_start_helper(void) +{ + char *rootdir; + char *helper_path; + static bool helper_started = false; + + if(!present || initialized) + return -1; + + if(helper_started) + return 0; + + rootdir = getenv("AFM_APP_INSTALL_DIR"); + if(!rootdir) + return -1; + + if(helper_output) { + // Indicate desired output to helper + AFB_API_INFO(afbBindingV3root, "Setting RADIO_OUTPUT=%s", helper_output); + setenv("RADIO_OUTPUT", helper_output, 1); + } + + // Run helper + helper_path = malloc(HELPER_MAX); + if(!helper_path) + return -ENOMEM; + if(snprintf(helper_path, PATH_MAX, "%s/bin/%s", rootdir, HELPER_NAME) == PATH_MAX) { + AFB_API_ERROR(afbBindingV3root, "Could not create path to %s", HELPER_NAME); + return -EINVAL; + } + helper_pid = popen2(helper_path, &helper_out, &helper_in); + if(helper_pid < 0) { + AFB_API_ERROR(afbBindingV3root, "Could not run %s!", HELPER_NAME); + return -1; + } + AFB_API_DEBUG(afbBindingV3root, "%s started", HELPER_NAME); + helper_started = true; + free(helper_path); + + return 0; +} + +static int rtlsdr_init(void) +{ + GKeyFile *conf_file; + char *value_str; + int rc; + + if(!present) + return -1; + + if(initialized) + return 0; + // Load settings from configuration file if it exists conf_file = g_key_file_new(); if(conf_file && @@ -168,25 +242,12 @@ static int rtlsdr_init(void) // Start off with minimum bandplan frequency current_frequency = rtlsdr_get_min_frequency(BAND_FM); - - rootdir = getenv("AFM_APP_INSTALL_DIR"); - if(!rootdir) - return -1; - - // Run helper to detect adapter - helper_path = malloc(HELPER_MAX); - if(!helper_path) - return -ENOMEM; - if(snprintf(helper_path, HELPER_MAX, "%s/bin/%s --detect", rootdir, HELPER_NAME) == HELPER_MAX) { - AFB_API_ERROR(afbBindingV3root, "Could not create command for \"%s --detect\"", HELPER_NAME); - return -EINVAL; - } - if(system(helper_path) != 0) { - free(helper_path); - return -1; + rc = rtlsdr_start_helper(); + if(rc != 0) { + return rc; } - present = true; + initialized = true; rtlsdr_set_frequency(current_frequency); return 0; @@ -212,7 +273,7 @@ static void rtlsdr_set_frequency(uint32_t frequency) ssize_t rc; uint32_t n; - if(!present) + if(!initialized) return; if(frequency < known_fm_band_plans[bandplan].min || @@ -298,62 +359,17 @@ static uint32_t rtlsdr_get_frequency_step(radio_band_t band) return ret; } -static int rtlsdr_start_helper(void) -{ - char *rootdir; - char *helper_path; - static bool helper_started = false; - - if(!present) - return -1; - - if(helper_started) - return 0; - - rootdir = getenv("AFM_APP_INSTALL_DIR"); - if(!rootdir) - return -1; - - if(helper_output) { - // Indicate desired output to helper - AFB_API_INFO(afbBindingV3root, "Setting RADIO_OUTPUT=%s", helper_output); - setenv("RADIO_OUTPUT", helper_output, 1); - } - - // Run helper - helper_path = malloc(HELPER_MAX); - if(!helper_path) - return -ENOMEM; - if(snprintf(helper_path, PATH_MAX, "%s/bin/%s", rootdir, HELPER_NAME) == PATH_MAX) { - AFB_API_ERROR(afbBindingV3root, "Could not create path to %s", HELPER_NAME); - return -EINVAL; - } - helper_pid = popen2(helper_path, &helper_out, &helper_in); - if(helper_pid < 0) { - AFB_API_ERROR(afbBindingV3root, "Could not run %s!", HELPER_NAME); - return -1; - } - AFB_API_DEBUG(afbBindingV3root, "%s started", HELPER_NAME); - helper_started = true; - free(helper_path); - - return 0; -} - static void rtlsdr_start(void) { - if(!present) - return; + ssize_t rc; + char cmd[HELPER_CMD_MAXLEN]; - if(active) + if(!initialized) return; - if(rtlsdr_start_helper() < 0) + if(active) return; - ssize_t rc; - char cmd[HELPER_CMD_MAXLEN]; - snprintf(cmd, sizeof(cmd), "START\n"); pthread_mutex_lock(&helper_mutex); rc = write(helper_in, cmd, strlen(cmd)); @@ -368,7 +384,7 @@ static void rtlsdr_start(void) static void rtlsdr_stop(void) { ssize_t rc; - if(!present) + if(!initialized) return; if (!active) @@ -470,6 +486,7 @@ static void rtlsdr_set_stereo_mode(radio_stereo_mode_t mode) radio_impl_ops_t rtlsdr_impl_ops = { .name = "RTL-SDR USB adapter", + .probe = rtlsdr_probe, .init = rtlsdr_init, .set_output = rtlsdr_set_output, .get_frequency = rtlsdr_get_frequency, |