mirror of
https://github.com/radio95-rnt/fm95.git
synced 2026-02-27 11:33:54 +01:00
restructure sca95
This commit is contained in:
145
src/sca95.c
145
src/sca95.c
@@ -5,9 +5,9 @@
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#define buffer_tlength_fragsize 12288
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#define buffer_prebuf 8
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#define DEFAULT_SCA_FREQUENCY 67000.0f
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#define DEFAULT_SCA_DEVIATION 7000.0f
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#define DEFAULT_SCA_CLIPPER_THRESHOLD 1.0f
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#define DEFAULT_FREQUENCY 67000.0f
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#define DEFAULT_DEVIATION 7000.0f
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#define DEFAULT_CLIPPER_THRESHOLD 1.0f
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#include "../modulation/fm_modulator.h"
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@@ -26,9 +26,22 @@
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static volatile sig_atomic_t to_run = 1;
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inline float hard_clip(float sample, float threshold) {
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return fmaxf(-threshold, fminf(threshold, sample));
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}
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inline float hard_clip(float sample, float threshold) { return fmaxf(-threshold, fminf(threshold, sample)); }
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typedef struct {
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float freq;
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float deviation;
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float clipper;
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float volume;
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float master_volume;
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float audio_volume;
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uint32_t sample_rate;
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} Sca95_Config;
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typedef struct
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{
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PulseInputDevice input;
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PulseOutputDevice output;
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} Sca95_Runtime;
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static void stop(int signum) {
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(void)signum;
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@@ -45,36 +58,64 @@ void show_help(char *name) {
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"\t-F,--sca_dev\tOverride the SCA deviation [default: %.2f]\n"
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"\t-C,--sca_clip\tOverride the SCA clipper threshold [default: %.2f]\n"
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"\t-A,--master_vol\tSet master volume [default: %.3f]\n"
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"\t-v,--volume\tSet audio volume [default: %.3f]\n"
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,name
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,INPUT_DEVICE
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,OUTPUT_DEVICE
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,DEFAULT_SCA_FREQUENCY
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,DEFAULT_SCA_DEVIATION
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,DEFAULT_SCA_CLIPPER_THRESHOLD
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,DEFAULT_FREQUENCY
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,DEFAULT_DEVIATION
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,DEFAULT_CLIPPER_THRESHOLD
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,DEFAULT_VOLUME
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,DEFAULT_AUDIO_VOLUME
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);
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}
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int run_sca95(Sca95_Config config, Sca95_Runtime* runtime) {
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FMModulator sca_mod;
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init_fm_modulator(&sca_mod, config.freq, config.deviation, config.sample_rate);
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int pulse_error;
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float audio_input[BUFFER_SIZE];
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float output[BUFFER_SIZE];
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while (to_run) {
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if((pulse_error = read_PulseInputDevice(&runtime->input, audio_input, sizeof(audio_input)))) {
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fprintf(stderr, "Error reading from input device: %s\n", pa_strerror(pulse_error));
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to_run = 0;
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break;
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}
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for (uint16_t i = 0; i < BUFFER_SIZE; i++) {
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output[i] = modulate_fm(&sca_mod, hard_clip(audio_input[i]*config.audio_volume, config.clipper))*config.master_volume;
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}
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if((pulse_error = write_PulseOutputDevice(&runtime->output, output, sizeof(output)))) {
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fprintf(stderr, "Error writing to output device: %s\n", pa_strerror(pulse_error));
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to_run = 0;
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break;
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}
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}
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return 0;
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}
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int main(int argc, char **argv) {
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printf("sca95 (a SCA modulator by radio95) version 1.0\n");
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printf("sca95 (a SCA modulator by radio95) version 1.1\n");
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PulseInputDevice input_device;
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PulseOutputDevice output_device;
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Sca95_Config config = {
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.freq = DEFAULT_FREQUENCY,
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.deviation = DEFAULT_DEVIATION,
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.clipper = DEFAULT_CLIPPER_THRESHOLD,
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.master_volume = DEFAULT_VOLUME,
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.audio_volume = DEFAULT_AUDIO_VOLUME,
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.sample_rate = DEFAULT_SAMPLE_RATE
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};
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float sca_frequency = DEFAULT_SCA_FREQUENCY;
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float sca_deviation = DEFAULT_SCA_DEVIATION;
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float sca_clipper_threshold = DEFAULT_SCA_CLIPPER_THRESHOLD;
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char audio_input_device[48] = INPUT_DEVICE;
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char audio_output_device[48] = OUTPUT_DEVICE;
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float master_volume = DEFAULT_VOLUME;
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float audio_volume = DEFAULT_AUDIO_VOLUME;
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uint32_t sample_rate = DEFAULT_SAMPLE_RATE;
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char audio_input_device[64] = INPUT_DEVICE;
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char audio_output_device[64] = OUTPUT_DEVICE;
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int opt;
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const char *short_opt = "i:o:f:F:C:A:";
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const char *short_opt = "i:o:f:F:C:A:v:h";
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struct option long_opt[] =
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{
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{"input", required_argument, NULL, 'i'},
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@@ -99,19 +140,19 @@ int main(int argc, char **argv) {
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memcpy(audio_output_device, optarg, 47);
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break;
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case 'f': //SCA freq
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sca_frequency = strtof(optarg, NULL);
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config.freq = strtof(optarg, NULL);
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break;
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case 'F': //SCA deviation
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sca_deviation = strtof(optarg, NULL);
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config.deviation = strtof(optarg, NULL);
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break;
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case 'C': //SCA clip
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sca_clipper_threshold = strtof(optarg, NULL);
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config.clipper = strtof(optarg, NULL);
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break;
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case 'A': // Master vol
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master_volume = strtof(optarg, NULL);
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config.master_volume = strtof(optarg, NULL);
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break;
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case 'v': // Audio Volume
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audio_volume = strtof(optarg, NULL);
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config.audio_volume = strtof(optarg, NULL);
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break;
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case 'h':
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show_help(argv[0]);
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@@ -131,8 +172,11 @@ int main(int argc, char **argv) {
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int opentime_pulse_error;
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Sca95_Runtime runtime;
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memset(&runtime, 0, sizeof(runtime));
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printf("Connecting to input device... (%s)\n", audio_input_device);
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opentime_pulse_error = init_PulseInputDevice(&input_device, sample_rate, 1, "sca95", "Main Audio Input", audio_input_device, &input_buffer_atr, PA_SAMPLE_FLOAT32NE);
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opentime_pulse_error = init_PulseInputDevice(&runtime.input, config.sample_rate, 1, "sca95", "Main Audio Input", audio_input_device, &input_buffer_atr, PA_SAMPLE_FLOAT32NE);
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if (opentime_pulse_error) {
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fprintf(stderr, "Error: cannot open input device: %s\n", pa_strerror(opentime_pulse_error));
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return 1;
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@@ -140,46 +184,19 @@ int main(int argc, char **argv) {
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printf("Connecting to output device... (%s)\n", audio_output_device);
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opentime_pulse_error = init_PulseOutputDevice(&output_device, sample_rate, 1, "sca95", "Main Audio Output", audio_output_device, &output_buffer_atr, PA_SAMPLE_FLOAT32NE);
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opentime_pulse_error = init_PulseOutputDevice(&runtime.output, config.sample_rate, 1, "sca95", "Signal Output", audio_output_device, &output_buffer_atr, PA_SAMPLE_FLOAT32NE);
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if (opentime_pulse_error) {
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fprintf(stderr, "Error: cannot open output device: %s\n", pa_strerror(opentime_pulse_error));
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free_PulseInputDevice(&input_device);
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free_PulseInputDevice(&runtime.input);
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return 1;
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}
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FMModulator sca_mod;
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init_fm_modulator(&sca_mod, sca_frequency, sca_deviation, sample_rate);
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signal(SIGINT, stop);
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signal(SIGTERM, stop);
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int pulse_error;
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float audio_input[BUFFER_SIZE];
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float output[BUFFER_SIZE];
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while (to_run) {
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if((pulse_error = read_PulseInputDevice(&input_device, audio_input, sizeof(audio_input)))) {
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if(pulse_error == -1) fprintf(stderr, "Main PulseInputDevice reported as uninitialized.");
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else fprintf(stderr, "Error reading from input device: %s\n", pa_strerror(pulse_error));
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to_run = 0;
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break;
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}
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for (uint16_t i = 0; i < BUFFER_SIZE; i++) {
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output[i] = modulate_fm(&sca_mod, hard_clip(audio_input[i]*audio_volume, sca_clipper_threshold))*master_volume;
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}
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if((pulse_error = write_PulseOutputDevice(&output_device, output, sizeof(output)))) {
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if(pulse_error == -1) fprintf(stderr, "Main PulseOutputDevice reported as uninitialized.");
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else fprintf(stderr, "Error writing to output device: %s\n", pa_strerror(pulse_error));
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to_run = 0;
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break;
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}
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}
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int ret = run_sca95(config, &runtime);
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printf("Cleaning up...\n");
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free_PulseInputDevice(&input_device);
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free_PulseOutputDevice(&output_device);
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return 0;
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}
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free_PulseInputDevice(&runtime.input);
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free_PulseOutputDevice(&runtime.output);
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return ret;
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}
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