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-rw-r--r--src/output/jack_plugin.c486
1 files changed, 486 insertions, 0 deletions
diff --git a/src/output/jack_plugin.c b/src/output/jack_plugin.c
new file mode 100644
index 000000000..6f2bcd3a1
--- /dev/null
+++ b/src/output/jack_plugin.c
@@ -0,0 +1,486 @@
+/* jack plug in for the Music Player Daemon (MPD)
+ * (c)2006 by anarch(anarchsss@gmail.com)
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "../output_api.h"
+
+#ifdef HAVE_JACK
+
+#include "../utils.h"
+#include "../log.h"
+
+#include <assert.h>
+
+#include <jack/jack.h>
+#include <jack/types.h>
+#include <jack/ringbuffer.h>
+
+static const size_t sample_size = sizeof(jack_default_audio_sample_t);
+
+struct jack_data {
+ struct audio_output *ao;
+
+ /* configuration */
+ const char *name;
+ const char *output_ports[2];
+ int ringbuffer_size;
+
+ /* for srate() only */
+ struct audio_format *audio_format;
+
+ /* jack library stuff */
+ jack_port_t *ports[2];
+ jack_client_t *client;
+ jack_ringbuffer_t *ringbuffer[2];
+ int bps;
+ int shutdown;
+};
+
+static struct jack_data *
+mpd_jack_new(void)
+{
+ struct jack_data *ret;
+
+ ret = xcalloc(sizeof(*ret), 1);
+
+ ret->name = "mpd";
+ ret->ringbuffer_size = 32768;
+
+ return ret;
+}
+
+static void
+mpd_jack_client_free(struct jack_data *jd)
+{
+ assert(jd != NULL);
+
+ if (jd->client != NULL) {
+ jack_deactivate(jd->client);
+ jack_client_close(jd->client);
+ jd->client = NULL;
+ }
+
+ if (jd->ringbuffer[0] != NULL) {
+ jack_ringbuffer_free(jd->ringbuffer[0]);
+ jd->ringbuffer[0] = NULL;
+ }
+
+ if (jd->ringbuffer[1] != NULL) {
+ jack_ringbuffer_free(jd->ringbuffer[1]);
+ jd->ringbuffer[1] = NULL;
+ }
+}
+
+static void
+mpd_jack_free(struct jack_data *jd)
+{
+ int i;
+
+ assert(jd != NULL);
+
+ mpd_jack_client_free(jd);
+
+ if (strcmp(jd->name, "mpd") != 0)
+ xfree(jd->name);
+
+ for ( i = ARRAY_SIZE(jd->output_ports); --i >= 0; ) {
+ if (!jd->output_ports[i])
+ continue;
+ xfree(jd->output_ports[i]);
+ }
+
+ free(jd);
+}
+
+static void
+mpd_jack_finish(void *data)
+{
+ struct jack_data *jd = data;
+ mpd_jack_free(jd);
+}
+
+static int
+mpd_jack_srate(mpd_unused jack_nframes_t rate, void *data)
+{
+ struct jack_data *jd = (struct jack_data *)data;
+ struct audio_format *audioFormat = jd->audio_format;
+
+ audioFormat->sample_rate = (int)jack_get_sample_rate(jd->client);
+
+ return 0;
+}
+
+static int
+mpd_jack_process(jack_nframes_t nframes, void *arg)
+{
+ struct jack_data *jd = (struct jack_data *) arg;
+ jack_default_audio_sample_t *out;
+ size_t available;
+
+ if (nframes <= 0)
+ return 0;
+
+ for (unsigned i = 0; i < 2; ++i) {
+ available = jack_ringbuffer_read_space(jd->ringbuffer[i]);
+ assert(available % sample_size == 0);
+ available /= sample_size;
+ if (available > nframes)
+ available = nframes;
+
+ out = jack_port_get_buffer(jd->ports[i], nframes);
+ jack_ringbuffer_read(jd->ringbuffer[i],
+ (char *)out, available * sample_size);
+
+ while (available < nframes)
+ /* ringbuffer underrun, fill with silence */
+ out[available++] = 0.0;
+ }
+
+ return 0;
+}
+
+static void
+mpd_jack_shutdown(void *arg)
+{
+ struct jack_data *jd = (struct jack_data *) arg;
+ jd->shutdown = 1;
+}
+
+static void
+set_audioformat(struct jack_data *jd, struct audio_format *audio_format)
+{
+ audio_format->sample_rate = jack_get_sample_rate(jd->client);
+ DEBUG("samplerate = %u\n", audio_format->sample_rate);
+ audio_format->channels = 2;
+
+ if (audio_format->bits != 16 && audio_format->bits != 24)
+ audio_format->bits = 24;
+
+ jd->bps = audio_format->channels
+ * sizeof(jack_default_audio_sample_t)
+ * audio_format->sample_rate;
+}
+
+static void
+mpd_jack_error(const char *msg)
+{
+ ERROR("jack: %s\n", msg);
+}
+
+static void *
+mpd_jack_init(struct audio_output *ao,
+ mpd_unused const struct audio_format *audio_format,
+ ConfigParam *param)
+{
+ struct jack_data *jd;
+ BlockParam *bp;
+ char *endptr;
+ int val;
+ char *cp = NULL;
+
+ jd = mpd_jack_new();
+ jd->ao = ao;
+
+ DEBUG("mpd_jack_init (pid=%d)\n", getpid());
+ if (param == NULL)
+ return jd;
+
+ if ( (bp = getBlockParam(param, "ports")) ) {
+ DEBUG("output_ports=%s\n", bp->value);
+
+ if (!(cp = strchr(bp->value, ',')))
+ FATAL("expected comma and a second value for '%s' "
+ "at line %d: %s\n",
+ bp->name, bp->line, bp->value);
+
+ *cp = '\0';
+ jd->output_ports[0] = xstrdup(bp->value);
+ *cp++ = ',';
+
+ if (!*cp)
+ FATAL("expected a second value for '%s' at line %d: "
+ "%s\n", bp->name, bp->line, bp->value);
+
+ jd->output_ports[1] = xstrdup(cp);
+
+ if (strchr(cp,','))
+ FATAL("Only %d values are supported for '%s' "
+ "at line %d\n",
+ (int)ARRAY_SIZE(jd->output_ports),
+ bp->name, bp->line);
+ }
+
+ if ( (bp = getBlockParam(param, "ringbuffer_size")) ) {
+ errno = 0;
+ val = strtol(bp->value, &endptr, 10);
+
+ if ( errno == 0 && endptr != bp->value) {
+ jd->ringbuffer_size = val < 32768 ? 32768 : val;
+ DEBUG("ringbuffer_size=%d\n", jd->ringbuffer_size);
+ } else {
+ FATAL("%s is not a number; ringbuf_size=%d\n",
+ bp->value, jd->ringbuffer_size);
+ }
+ }
+
+ if ( (bp = getBlockParam(param, "name"))
+ && (strcmp(bp->value, "mpd") != 0) ) {
+ jd->name = xstrdup(bp->value);
+ DEBUG("name=%s\n", jd->name);
+ }
+
+ return jd;
+}
+
+static int
+mpd_jack_test_default_device(void)
+{
+ return 0;
+}
+
+static int
+mpd_jack_connect(struct jack_data *jd, struct audio_format *audio_format)
+{
+ const char **jports;
+ char *port_name;
+
+ jd->audio_format = audio_format;
+
+ if ( (jd->client = jack_client_new(jd->name)) == NULL ) {
+ ERROR("jack server not running?\n");
+ return -1;
+ }
+
+ jack_set_error_function(mpd_jack_error);
+ jack_set_process_callback(jd->client, mpd_jack_process, jd);
+ jack_set_sample_rate_callback(jd->client, mpd_jack_srate, jd);
+ jack_on_shutdown(jd->client, mpd_jack_shutdown, jd);
+
+ if ( jack_activate(jd->client) ) {
+ ERROR("cannot activate client\n");
+ return -1;
+ }
+
+ jd->ports[0] = jack_port_register(jd->client, "left",
+ JACK_DEFAULT_AUDIO_TYPE,
+ JackPortIsOutput, 0);
+ if ( !jd->ports[0] ) {
+ ERROR("Cannot register left output port.\n");
+ return -1;
+ }
+
+ jd->ports[1] = jack_port_register(jd->client, "right",
+ JACK_DEFAULT_AUDIO_TYPE,
+ JackPortIsOutput, 0);
+ if ( !jd->ports[1] ) {
+ ERROR("Cannot register right output port.\n");
+ return -1;
+ }
+
+ /* hay que buscar que hay */
+ if (!jd->output_ports[1] &&
+ (jports = jack_get_ports(jd->client, NULL, NULL,
+ JackPortIsPhysical | JackPortIsInput))) {
+ jd->output_ports[0] = jports[0];
+ jd->output_ports[1] = jports[1] ? jports[1] : jports[0];
+ DEBUG("output_ports: %s %s\n",
+ jd->output_ports[0], jd->output_ports[1]);
+ free(jports);
+ }
+
+ if ( jd->output_ports[1] ) {
+ jd->ringbuffer[0] = jack_ringbuffer_create(jd->ringbuffer_size);
+ jd->ringbuffer[1] = jack_ringbuffer_create(jd->ringbuffer_size);
+ memset(jd->ringbuffer[0]->buf, 0, jd->ringbuffer[0]->size);
+ memset(jd->ringbuffer[1]->buf, 0, jd->ringbuffer[1]->size);
+
+ port_name = xmalloc(sizeof(char)*(7+strlen(jd->name)));
+
+ sprintf(port_name, "%s:left", jd->name);
+ if ( (jack_connect(jd->client, port_name,
+ jd->output_ports[0])) != 0 ) {
+ ERROR("%s is not a valid Jack Client / Port\n",
+ jd->output_ports[0]);
+ free(port_name);
+ return -1;
+ }
+ sprintf(port_name, "%s:right", jd->name);
+ if ( (jack_connect(jd->client, port_name,
+ jd->output_ports[1])) != 0 ) {
+ ERROR("%s is not a valid Jack Client / Port\n",
+ jd->output_ports[1]);
+ free(port_name);
+ return -1;
+ }
+ free(port_name);
+ }
+
+ return 1;
+}
+
+static int
+mpd_jack_open(void *data, struct audio_format *audio_format)
+{
+ struct jack_data *jd = data;
+
+ assert(jd != NULL);
+
+ if (jd->client == NULL && mpd_jack_connect(jd, audio_format) < 0) {
+ mpd_jack_client_free(jd);
+ return -1;
+ }
+
+ set_audioformat(jd, audio_format);
+
+ return 0;
+}
+
+static void
+mpd_jack_close(mpd_unused void *data)
+{
+ /*mpd_jack_finish(audioOutput);*/
+}
+
+static void
+mpd_jack_cancel (mpd_unused void *data)
+{
+}
+
+static inline jack_default_audio_sample_t
+sample_16_to_jack(int16_t sample)
+{
+ return sample / (jack_default_audio_sample_t)(1 << (16 - 1));
+}
+
+static void
+mpd_jack_write_samples_16(struct jack_data *jd, const int16_t *src,
+ unsigned num_samples)
+{
+ jack_default_audio_sample_t sample;
+
+ while (num_samples-- > 0) {
+ sample = sample_16_to_jack(*src++);
+ jack_ringbuffer_write(jd->ringbuffer[0], (void*)&sample,
+ sizeof(sample));
+
+ sample = sample_16_to_jack(*src++);
+ jack_ringbuffer_write(jd->ringbuffer[1], (void*)&sample,
+ sizeof(sample));
+ }
+}
+
+static inline jack_default_audio_sample_t
+sample_24_to_jack(int32_t sample)
+{
+ return sample / (jack_default_audio_sample_t)(1 << (24 - 1));
+}
+
+static void
+mpd_jack_write_samples_24(struct jack_data *jd, const int32_t *src,
+ unsigned num_samples)
+{
+ jack_default_audio_sample_t sample;
+
+ while (num_samples-- > 0) {
+ sample = sample_24_to_jack(*src++);
+ jack_ringbuffer_write(jd->ringbuffer[0], (void*)&sample,
+ sizeof(sample));
+
+ sample = sample_24_to_jack(*src++);
+ jack_ringbuffer_write(jd->ringbuffer[1], (void*)&sample,
+ sizeof(sample));
+ }
+}
+
+static void
+mpd_jack_write_samples(struct jack_data *jd, const void *src,
+ unsigned num_samples)
+{
+ switch (jd->audio_format->bits) {
+ case 16:
+ mpd_jack_write_samples_16(jd, (const int16_t*)src,
+ num_samples);
+ break;
+
+ case 24:
+ mpd_jack_write_samples_24(jd, (const int32_t*)src,
+ num_samples);
+ break;
+
+ default:
+ assert(false);
+ }
+}
+
+static int
+mpd_jack_play(void *data, const char *buff, size_t size)
+{
+ struct jack_data *jd = data;
+ const size_t frame_size = audio_format_frame_size(jd->audio_format);
+ size_t space, space1;
+
+ if (jd->shutdown) {
+ ERROR("Refusing to play, because there is no client thread.\n");
+ mpd_jack_client_free(jd);
+ audio_output_closed(jd->ao);
+ return 0;
+ }
+
+ assert(size % frame_size == 0);
+ size /= frame_size;
+ while (size > 0 && !jd->shutdown) {
+ space = jack_ringbuffer_write_space(jd->ringbuffer[0]);
+ space1 = jack_ringbuffer_write_space(jd->ringbuffer[1]);
+ if (space > space1)
+ /* send data symmetrically */
+ space = space1;
+
+ space /= sample_size;
+ if (space > 0) {
+ if (space > size)
+ space = size;
+
+ mpd_jack_write_samples(jd, buff, space);
+
+ buff += space * frame_size;
+ size -= space;
+ } else {
+ /* XXX do something more intelligent to
+ synchronize */
+ my_usleep(10000);
+ }
+
+ }
+
+ return 0;
+}
+
+const struct audio_output_plugin jackPlugin = {
+ .name = "jack",
+ .test_default_device = mpd_jack_test_default_device,
+ .init = mpd_jack_init,
+ .finish = mpd_jack_finish,
+ .open = mpd_jack_open,
+ .play = mpd_jack_play,
+ .cancel = mpd_jack_cancel,
+ .close = mpd_jack_close,
+};
+
+#else /* HAVE JACK */
+
+DISABLED_AUDIO_OUTPUT_PLUGIN(jackPlugin)
+
+#endif /* HAVE_JACK */
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