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@@ -0,0 +1,160 @@
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+/*
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+Copyright (C) 2015 by Bernd Buschinski <[email protected]>
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+
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+This program is free software: you can redistribute it and/or modify
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+it under the terms of the GNU General Public License as published by
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+the Free Software Foundation, either version 2 of the License, or
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+(at your option) any later version.
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+
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+This program is distributed in the hope that it will be useful,
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+but WITHOUT ANY WARRANTY; without even the implied warranty of
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+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+GNU General Public License for more details.
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+
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+You should have received a copy of the GNU General Public License
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+along with this program. If not, see <http://www.gnu.org/licenses/>.
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+*/
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+
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+#include "jack-wrapper.h"
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+
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+#include <pthread.h>
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+#include <stdio.h>
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+
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+#include <util/platform.h>
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+
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+#define blog(level, msg, ...) blog(level, "jack-input: " msg, ##__VA_ARGS__)
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+
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+/**
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+ * Get obs speaker layout from number of channels
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+ *
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+ * @param channels number of channels reported by jack
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+ *
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+ * @return obs speaker_layout id
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+ *
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+ * @note This *might* not work for some rather unusual setups, but should work
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+ * fine for the majority of cases.
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+ */
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+static enum speaker_layout jack_channels_to_obs_speakers(uint_fast32_t channels)
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+{
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+ switch(channels) {
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+ case 1: return SPEAKERS_MONO;
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+ case 2: return SPEAKERS_STEREO;
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+ case 3: return SPEAKERS_2POINT1;
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+ case 4: return SPEAKERS_SURROUND;
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+ case 5: return SPEAKERS_4POINT1;
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+ case 6: return SPEAKERS_5POINT1;
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+ /* What should we do with 7 channels? */
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+ /* case 7: return SPEAKERS_...; */
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+ case 8: return SPEAKERS_7POINT1;
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+ }
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+
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+ return SPEAKERS_UNKNOWN;
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+}
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+
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+int jack_process_callback(jack_nframes_t nframes, void* arg)
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+{
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+ struct jack_data* data = (struct jack_data*)arg;
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+ if (data == 0)
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+ return 0;
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+
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+ pthread_mutex_lock(&data->jack_mutex);
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+
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+ struct obs_source_audio out;
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+ out.speakers = jack_channels_to_obs_speakers(data->channels);
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+ out.samples_per_sec = jack_get_sample_rate (data->jack_client);
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+ /* format is always 32 bit float for jack */
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+ out.format = AUDIO_FORMAT_FLOAT_PLANAR;
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+
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+ for (unsigned int i = 0; i < data->channels; ++i) {
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+ jack_default_audio_sample_t *jack_buffer =
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+ (jack_default_audio_sample_t *)jack_port_get_buffer(
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+ data->jack_ports[i], nframes);
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+ out.data[i] = (uint8_t *)jack_buffer;
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+ }
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+
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+ out.frames = nframes;
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+ out.timestamp = os_gettime_ns() -
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+ jack_frames_to_time(data->jack_client, nframes);
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+
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+ obs_source_output_audio(data->source, &out);
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+ pthread_mutex_unlock(&data->jack_mutex);
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+ return 0;
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+}
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+
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+int_fast32_t jack_init(struct jack_data* data)
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+{
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+ pthread_mutex_lock(&data->jack_mutex);
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+
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+ if (data->jack_client != NULL)
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+ goto good;
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+
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+ jack_options_t jack_option = data->start_jack_server ?
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+ JackNullOption : JackNoStartServer;
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+
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+ data->jack_client = jack_client_open(data->device, jack_option, 0);
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+ if (data->jack_client == NULL) {
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+ blog(LOG_ERROR,
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+ "jack_client_open Error:"
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+ "Could not create JACK client! %s",
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+ data->device);
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+ goto error;
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+ }
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+
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+ data->jack_ports = (jack_port_t**)bzalloc(
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+ sizeof(jack_port_t*) * data->channels);
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+ for (unsigned int i = 0; i < data->channels; ++i) {
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+ char port_name[10] = {'\0'};
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+ snprintf(port_name, sizeof(port_name), "in_%d", i+1);
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+
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+ data->jack_ports[i] = jack_port_register(data->jack_client,
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+ port_name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0);
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+ if (data->jack_ports[i] == NULL) {
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+ blog(LOG_ERROR,
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+ "jack_port_register Error:"
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+ "Could not create JACK port! %s",
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+ port_name);
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+ goto error;
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+ }
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+ }
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+
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+ if (jack_set_process_callback(data->jack_client,
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+ jack_process_callback, data) != 0) {
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+ blog(LOG_ERROR, "jack_set_process_callback Error");
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+ goto error;
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+ }
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+
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+ if (jack_activate(data->jack_client) != 0) {
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+ blog(LOG_ERROR,
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+ "jack_activate Error:"
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+ "Could not activate JACK client!");
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+ goto error;
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+ }
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+
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+good:
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+ pthread_mutex_unlock(&data->jack_mutex);
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+ return 0;
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+
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+error:
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+ pthread_mutex_unlock(&data->jack_mutex);
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+ return 1;
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+}
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+
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+void deactivate_jack(struct jack_data* data)
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+{
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+ pthread_mutex_lock(&data->jack_mutex);
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+
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+ if (data->jack_client) {
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+ if (data->jack_ports != NULL) {
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+ for (int i = 0; i < data->channels; ++i) {
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+ if (data->jack_ports[i] != NULL)
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+ jack_port_unregister(data->jack_client,
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+ data->jack_ports[i]);
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+ }
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+ bfree(data->jack_ports);
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+ data->jack_ports = NULL;
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+ }
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+ jack_client_close(data->jack_client);
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+ data->jack_client = NULL;
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+ }
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+ pthread_mutex_unlock(&data->jack_mutex);
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+}
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Bernd Buschinski