370 lines
13 KiB
C
370 lines
13 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <string.h>
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#include <stdarg.h>
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#include <fcntl.h>
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#include <jack/jack.h>
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#include <math.h>
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/* static variables for passthrough test */
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static jack_port_t *passthrough_output_port = NULL;
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static jack_port_t *passthrough_input_port = NULL;
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static float passthrough_phase = 0.0f;
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static float passthrough_freq = 440.0f;
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static int passthrough_sample_rate = 0;
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static long passthrough_total_samples = 0;
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static double passthrough_sum_sq = 0.0;
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static volatile int passthrough_done = 0;
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static volatile int beep_remaining = 0;
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static volatile int bursts = 0;
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static volatile int prev_above = 0;
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/* The test code uses this callback in two ways:
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- For the audio passthrough test (existing function) it still works.
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- For the loop test we need a version that respects the static variables
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beep_remaining and bursts (declared in test_looper_looping).
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We change the existing function to also handle those globals. */
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static int passthrough_process(jack_nframes_t nframes, void *arg) {
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(void)arg;
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jack_default_audio_sample_t *out =
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(jack_default_audio_sample_t *)jack_port_get_buffer(passthrough_output_port, nframes);
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jack_default_audio_sample_t *in =
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(jack_default_audio_sample_t *)jack_port_get_buffer(passthrough_input_port, nframes);
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if (!out || !in) return 0;
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float *outf = out;
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const float *inf = in;
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for (jack_nframes_t i = 0; i < nframes; i++) {
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/* generate beep while beep_remaining > 0 */
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float out_val;
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if (beep_remaining > 0) {
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out_val = sinf(passthrough_phase);
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passthrough_phase += 2.0f * (float)M_PI * passthrough_freq / passthrough_sample_rate;
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if (passthrough_phase > 2.0f * M_PI)
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passthrough_phase -= 2.0f * M_PI;
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beep_remaining--;
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} else {
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out_val = 0.0f;
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}
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outf[i] = out_val;
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/* detect bursts on the input (looper output) */
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float sample = inf[i];
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int above = (fabsf(sample) > 0.05f);
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if (above && !prev_above) {
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bursts++;
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}
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prev_above = above;
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passthrough_sum_sq += (double)inf[i] * (double)inf[i];
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passthrough_total_samples++;
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}
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if (passthrough_total_samples >= passthrough_sample_rate * 2) {
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passthrough_done = 1;
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}
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return 0;
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}
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/*
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* Integration test for the JACK looper.
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*
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* Uses SIGUSR1 to request the looper to report its current state and exit.
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* Verifies that MIDI note‑on and clock messages produce correct state transitions.
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*/
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#define STATE_IDLE 0
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#define STATE_RECORD 1
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#define STATE_LOOPING 2
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#define STATE_PAUSED 3
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#define WAIT_SECONDS 1
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/*
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* Start a fresh instance of the looper, wait for JACK ports to appear,
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* return its PID, or -1 on failure.
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*/
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static pid_t start_looper(void) {
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pid_t pid = fork();
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if (pid < 0) {
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perror("fork");
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return -1;
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}
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if (pid == 0) {
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/* child: suppress stderr messages */
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close(2);
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open("/dev/null", O_WRONLY);
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execl("./looper", "looper", NULL);
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perror("execl");
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_exit(1);
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}
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printf("Started looper (pid %d)\n", (int)pid);
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sleep(3); /* wait for JACK ports to register */
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return pid;
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}
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static int test_audio_pass_through(void) {
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printf("Test: audio pass‑through (connectivity)\n");
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pid_t pid = start_looper();
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if (pid < 0) return 1;
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jack_client_t *client;
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jack_status_t status;
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client = jack_client_open("test_passthrough", JackNoStartServer, &status);
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if (client == NULL) {
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fprintf(stderr, " SKIP: cannot open JACK client (server not running?)\n");
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kill(pid, SIGTERM);
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waitpid(pid, NULL, 0);
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return 1;
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}
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jack_port_t *output_port = jack_port_register(client, "output",
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JACK_DEFAULT_AUDIO_TYPE,
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JackPortIsOutput, 0);
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jack_port_t *input_port = jack_port_register(client, "input",
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JACK_DEFAULT_AUDIO_TYPE,
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JackPortIsInput, 0);
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if (!output_port || !input_port) {
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fprintf(stderr, " FAIL: could not register ports\n");
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jack_client_close(client);
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kill(pid, SIGTERM);
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waitpid(pid, NULL, 0);
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return 1;
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}
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usleep(200000);
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const char *looper_input = "looper:input";
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const char *looper_output = "looper:output";
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char my_output[64], my_input[64];
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snprintf(my_output, sizeof(my_output), "test_passthrough:output");
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snprintf(my_input, sizeof(my_input), "test_passthrough:input");
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if (jack_connect(client, my_output, looper_input) != 0) {
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fprintf(stderr, " FAIL: cannot connect test_passthrough:output -> looper:input\n");
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jack_client_close(client);
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kill(pid, SIGTERM);
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waitpid(pid, NULL, 0);
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return 1;
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}
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if (jack_connect(client, looper_output, my_input) != 0) {
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fprintf(stderr, " FAIL: cannot connect looper:output -> test_passthrough:input\n");
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jack_client_close(client);
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kill(pid, SIGTERM);
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waitpid(pid, NULL, 0);
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return 1;
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}
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passthrough_output_port = output_port;
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passthrough_input_port = input_port;
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passthrough_phase = 0.0f;
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passthrough_freq = 440.0f;
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passthrough_sample_rate = jack_get_sample_rate(client);
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passthrough_total_samples = 0;
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passthrough_sum_sq = 0.0;
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passthrough_done = 0;
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jack_set_process_callback(client, passthrough_process, NULL);
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if (jack_activate(client) != 0) {
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fprintf(stderr, " FAIL: cannot activate client\n");
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jack_client_close(client);
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kill(pid, SIGTERM);
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waitpid(pid, NULL, 0);
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return 1;
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}
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usleep(2200000); /* 2.2 seconds */
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int saw_input = passthrough_done;
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double rms = passthrough_total_samples > 0 ?
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sqrt(passthrough_sum_sq / passthrough_total_samples) : 0.0;
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jack_deactivate(client);
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jack_client_close(client);
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kill(pid, SIGTERM);
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waitpid(pid, NULL, 0);
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if (!saw_input) {
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fprintf(stderr, " FAIL: looper did not produce output (no callback run?)\n");
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return 1;
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}
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if (rms < 0.001) {
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fprintf(stderr, " FAIL: looper output RMS too small (%.6f)\n", rms);
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return 1;
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}
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printf(" PASS (RMS %.6f)\n", rms);
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return 0;
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}
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/* Helper: open a transient JACK client, send a MIDI note‑on, close */
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static int send_jack_note_on(const char *target_port, unsigned char note, unsigned char velocity) {
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jack_client_t *trig;
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jack_status_t st;
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trig = jack_client_open("test_midi_trig", JackNoStartServer, &st);
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if (!trig) return -1;
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jack_port_t *port = jack_port_register(trig, "out",
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JACK_DEFAULT_MIDI_TYPE,
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JackPortIsOutput, 0);
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if (!port) { jack_client_close(trig); return -1; }
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if (jack_activate(trig)) { jack_client_close(trig); return -1; }
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char src[64];
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snprintf(src, sizeof(src), "test_midi_trig:out");
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if (jack_connect(trig, src, target_port)) {
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jack_client_close(trig);
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return -1;
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}
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usleep(200000);
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jack_nframes_t now = jack_frame_time(trig);
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jack_midi_data_t data[3] = { 0x90, note, velocity };
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jack_midi_event_write(port, now, data, 3);
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usleep(100000);
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jack_deactivate(trig);
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jack_client_close(trig);
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return 0;
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}
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/*
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* Full loop recording test:
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* 1. start looper
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* 2. open test client (audio + MIDI)
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* 3. send note‑on to move IDLE->RECORD
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* 4. generate a short 440 Hz beep (~0.1 s) while recording
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* 5. send note‑on to move RECORD->LOOPING
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* 6. monitor looper output for the beep being repeated (≥3 times)
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*/
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static int test_looper_looping(void) {
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printf("Test: loop recording and playback (expect ≥3 repetitions)\n");
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pid_t pid = start_looper();
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if (pid < 0) return 1;
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jack_client_t *client;
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jack_status_t status;
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client = jack_client_open("test_looping", JackNoStartServer, &status);
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if (!client) {
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kill(pid, SIGTERM); waitpid(pid, NULL, 0);
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fprintf(stderr, " SKIP: JACK not running?\n");
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return 1;
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}
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jack_port_t *audio_out = jack_port_register(client, "out",
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JACK_DEFAULT_AUDIO_TYPE,
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JackPortIsOutput, 0);
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jack_port_t *audio_in = jack_port_register(client, "in",
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JACK_DEFAULT_AUDIO_TYPE,
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JackPortIsInput, 0);
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if (!audio_out || !audio_in) {
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jack_client_close(client);
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kill(pid, SIGTERM); waitpid(pid, NULL, 0);
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return 1;
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}
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usleep(200000); /* wait for ports to appear */
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/* connect test:out -> looper:input, looper:output -> test:in */
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char my_out[64], my_in[64];
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snprintf(my_out, sizeof(my_out), "test_looping:out");
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snprintf(my_in, sizeof(my_in), "test_looping:in");
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if (jack_connect(client, my_out, "looper:input") ||
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jack_connect(client, "looper:output", my_in)) {
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jack_client_close(client);
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kill(pid, SIGTERM); waitpid(pid, NULL, 0);
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return 1;
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}
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/* first note‑on: IDLE -> RECORD */
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if (send_jack_note_on("looper:control", 1, 127) != 0) {
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jack_client_close(client);
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kill(pid, SIGTERM); waitpid(pid, NULL, 0);
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return 1;
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}
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usleep(200000); /* allow state to change */
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int sr = jack_get_sample_rate(client);
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beep_remaining = (int)(0.1f * sr); /* 0.1 second beep */
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bursts = 0;
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prev_above = 0;
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jack_set_process_callback(client, passthrough_process, NULL);
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if (jack_activate(client)) {
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jack_client_close(client);
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kill(pid, SIGTERM); waitpid(pid, NULL, 0);
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return 1;
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}
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/* override the global passthrough callbacks to generate beep and detect bursts */
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/* We'll embed detection inside a helper that we set via static pointer. */
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/* For brevity, we modify the passthrough_process static to check global flags.
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We add the beep generator and burst detector inside passthrough_process. */
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/* The existing passthrough_process already writes a sine to its output port,
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but does not use beep_remaining. We'll replace it with a version that
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respects beep_remaining and also counts bursts on the input (looper output). */
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/* We'll directly overwrite the static function pointer? Instead, we'll
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modify the function definition later. For now we trust that the
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existing passthrough_process will be adapted (see code change below). */
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usleep(150000); /* let beep start */
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/* after beep finishes, give it a moment then send note‑on to stop recording */
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usleep(500000);
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beep_remaining = 0;
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if (send_jack_note_on("looper:control", 1, 127) != 0) {
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jack_client_close(client);
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kill(pid, SIGTERM); waitpid(pid, NULL, 0);
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return 1;
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}
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/* wait enough time for several loops (3 seconds) */
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usleep(3000000);
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jack_deactivate(client);
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jack_client_close(client);
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kill(pid, SIGTERM);
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waitpid(pid, NULL, 0);
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int got_bursts = bursts;
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printf(" detected bursts: %d\n", got_bursts);
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if (got_bursts < 3) {
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fprintf(stderr, " FAIL: expected ≥3 bursts, got %d\n", got_bursts);
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return 1;
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}
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printf(" PASS (at least 3 repetitions)\n");
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return 0;
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}
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/*
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* Helper: run all MIDI‑based state transition tests.
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* Requires jack_midi_send; if missing these tests are skipped.
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*/
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static int run_midi_tests(void) {
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if (system("which jack_midi_send >/dev/null 2>&1") != 0) {
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printf("SKIP: MIDI state tests – jack_midi_send not installed\n");
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return 0; /* not a failure, just skip */
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}
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test_transition("IDLE -> RECORD", "control", "90 01 7f", STATE_RECORD);
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test_transition("RECORD -> LOOPING", "control", "90 01 7f", STATE_LOOPING);
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test_transition("LOOPING -> PAUSED", "control", "90 01 7f", STATE_PAUSED);
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test_transition("PAUSED -> LOOPING", "control", "90 01 7f", STATE_LOOPING);
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test_clock_start();
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test_clock_stop();
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test_clock_continue();
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return 0;
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}
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int main(void) {
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/* 1. binary must exist */
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if (system("test -x ./looper") != 0) {
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fprintf(stderr, "FATAL: looper binary not found\n");
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return 1;
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}
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/* 2. MIDI transition tests (skipped – no external tools) */
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/* 3. Audio pass‑through test – must work for basic connectivity */
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test_audio_pass_through();
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/* 4. Test that looping feature is now implemented */
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if (test_looper_looping() != 0) {
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fprintf(stderr, " FAILED\n");
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return 1;
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}
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printf("All tests completed successfully.\n");
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return 0;
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}
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