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/*
* Copyright 1994-2022 Olivier Girondel
*
* This file is part of lebiniou.
*
* lebiniou is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* lebiniou is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with lebiniou. If not, see <http://www.gnu.org/licenses/>.
*/
#include <jack/jack.h>
#include "context.h"
#include "settings.h"
#include "pthread_utils.h"
uint32_t options = BO_NONE;
uint32_t version = 0;
/* JACK data */
static jack_port_t **input_ports;
static jack_client_t *client;
static const char *source_names[2] = { NULL, NULL };
static const char **ports;
// default input size if not defined in the configuration file
#define INSIZE 1024
static uint16_t insize = INSIZE;
// buffer jack samples here before copying to input->data
static double *data[2];
// number of jack frames to be read to reach input->size
static uint8_t chunks;
static void
jack_shutdown(void *arg)
{
Context_t *ctx = (Context_t *)arg;
printf("[!] JACK: server shut down, exiting\n");
ctx->running = 0;
}
static int
process(jack_nframes_t nframes, void *arg)
{
int chn;
uint32_t i;
Context_t *ctx = (Context_t *)arg;
jack_default_audio_sample_t *in;
static uint8_t chunk = 0;
static uint16_t idx = 0;
if (!ctx->input->mute) {
uint16_t idx2 = idx;
for (chn = 0; chn < 2; chn++) {
in = jack_port_get_buffer(input_ports[chn], nframes);
if (NULL != in) {
for (i = 0; i < nframes; i++, idx++) {
data[chn][idx] = in[i];
}
if (chn == 0) {
idx = idx2;
}
}
}
chunk++;
#ifdef DEBUG_JACKAUDIO
printf("[i] JACK: chunk= %d\n", chunk);
#endif
if (chunk == chunks) {
#ifdef DEBUG_JACKAUDIO
printf("[i] JACK: setting input, idx= %d\n", idx);
#endif
if (!xpthread_mutex_lock(&ctx->input->mutex)) {
for (i = 0; i < ctx->input->size; i++) {
ctx->input->data[A_LEFT][i] = data[0][i];
ctx->input->data[A_RIGHT][i] = data[1][i];
}
Input_set(ctx->input, A_STEREO);
xpthread_mutex_unlock(&ctx->input->mutex);
idx = chunk = 0;
}
}
}
return 0;
}
static void
setup_ports(void)
{
input_ports = xcalloc(2, sizeof(jack_port_t *));
for (int i = 0; i < 2; i++) {
char name[64];
sprintf(name, "input_%d", i);
if ((input_ports[i] = jack_port_register(client, name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0)) == 0) {
fprintf(stderr, "[!] JACK: cannot register input port \"%s\" !\n", name);
jack_client_close(client);
exit(1);
} else {
printf("[i] JACK: registered %s\n", name);
}
}
ports = jack_get_ports(client, NULL, NULL, JackPortIsPhysical|JackPortIsOutput);
if (NULL == ports) {
xerror("JACK: no physical capture ports\n");
}
}
int8_t
create(Context_t *ctx)
{
if ((client = jack_client_open(PACKAGE, JackNullOption, NULL)) == 0) {
xerror("JACK server not running ?\n");
}
jack_set_process_callback(client, process, ctx);
jack_on_shutdown(client, jack_shutdown, ctx);
json_t *input = Settings_get_input();
if (NULL != input) {
source_names[0] = json_string_value(json_object_get(input, "jackaudioLeft"));
source_names[1] = json_string_value(json_object_get(input, "jackaudioRight"));
} else {
source_names[0] = JACKAUDIO_DEFAULT_LEFT;
source_names[1] = JACKAUDIO_DEFAULT_RIGHT;
}
printf("[i] JACK: left capture from %s\n", source_names[0]);
printf("[i] JACK: right capture from %s\n", source_names[1]);
setup_ports();
jack_nframes_t jack_size = jack_get_buffer_size(client);
printf("[i] JACK: buffer size: %d\n", jack_size);
if (jack_size >= insize) {
chunks = 1;
insize = jack_size;
} else {
chunks = insize / jack_size;
}
printf("[i] JACK: %d chunks to read\n", chunks);
ctx->input = Input_new(insize);
data[0] = xcalloc(insize, sizeof(double));
data[1] = xcalloc(insize, sizeof(double));
if (jack_activate(client)) {
xerror("JACK: cannot activate client\n");
}
for (uint8_t i = 0; i < 2; i++) {
if (jack_connect(client, ports[i], jack_port_name(input_ports[i]))) {
jack_client_close(client);
xerror("JACK: can not connect input port %s to %s\n", jack_port_name(input_ports[i]), source_names[i]);
} else {
printf("[i] JACK: connected %s to %s\n", source_names[i], jack_port_name(input_ports[i]));
}
}
jack_free(ports);
return 1;
}
void
destroy(Context_t *ctx)
{
jack_client_close(client);
Input_delete(ctx->input);
xfree(data[0]);
xfree(data[1]);
xfree(input_ports);
}
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