/* 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 "../audioOutput.h"
#ifdef HAVE_JACK
#include <stdlib.h>
#include <errno.h>
#include "../conf.h"
#include "../log.h"
#include "../sig_handlers.h"
#include <sys/types.h>
#include <string.h>
#include <assert.h>
#include <signal.h>
#include <unistd.h>
#include <jack/jack.h>
#include <jack/types.h>
#include <jack/ringbuffer.h>
#define MIN(a, b) ((a) < (b) ? (a) : (b))
int ringbuf_sz = 32768;
char *ports[2] = {NULL, NULL};
typedef struct _JackData {
jack_options_t options;
jack_port_t *ports[2];
jack_client_t *client;
jack_default_audio_sample_t **in;
jack_ringbuffer_t *ringbuffer[2];
int bps;
int shutdown;
int nports;
int our_xrun;
} JackData;
JackData *jd = NULL;
static JackData *newJackData (void)
{
JackData *ret;
ret = calloc (sizeof (JackData), 1);
ret->options = JackNullOption;
return ret;
}
static void disconnect_jack (JackData *jd)
{
jack_deactivate (jd->client);
jack_client_close (jd->client);
ERROR ("disconnect_jack (pid=%d)\n", getpid ());
}
static void jack_finishDriver (AudioOutput * audioOutput)
{
JackData *jd = audioOutput->data;
disconnect_jack (jd);
free (jd);
free (ports[0]);
free (ports[1]);
}
static int srate (jack_nframes_t rate, void *data)
{
JackData *jd = (JackData *) ((AudioOutput*) data)->data;
AudioFormat *audioFormat = &(((AudioOutput*) data)->outAudioFormat);
audioFormat->sampleRate = (int) jack_get_sample_rate (jd->client);
return 0;
}
static int process (jack_nframes_t nframes, void *arg)
{
size_t i;
JackData *jd = (JackData *) arg;
jack_default_audio_sample_t *out[2];
size_t avail_data, avail_frames;
if ( nframes <= 0 )
return 0;
out[0] = jack_port_get_buffer (jd->ports[0], nframes);
out[1] = jack_port_get_buffer (jd->ports[1], nframes);
avail_data = jack_ringbuffer_read_space (jd->ringbuffer[1]);
if ( avail_data > 0 ) {
avail_frames = avail_data / sizeof (jack_default_audio_sample_t);
if (avail_frames > nframes) {
avail_frames = nframes;
avail_data = nframes * sizeof (jack_default_audio_sample_t);
}
jack_ringbuffer_read (jd->ringbuffer[0], (char *)out[0], avail_data);
jack_ringbuffer_read (jd->ringbuffer[1], (char *)out[1], avail_data);
if (avail_frames < nframes) {
jd->our_xrun = 1;
for (i = avail_frames; i < nframes; i++) {
out[0][i] = out[1][i] = 0.0;
}
}
} else {
//ERROR ("avail_data=%d, no play (pid=%d)!\n", avail_data, getpid ());
for (i = 0; i < nframes; i++) {
out[0][i] = 0.0;
out[1][i] = 0.0;
}
}
return 0;
}
static void shutdown_callback (void *arg)
{
JackData *jd = (JackData *) arg;
jd->shutdown = 1;
}
static void set_audioformat (AudioOutput *audioOutput)
{
JackData *jd = audioOutput->data;
AudioFormat *audioFormat = &audioOutput->outAudioFormat;
audioFormat->sampleRate = (int) jack_get_sample_rate (jd->client);
ERROR ("samplerate = %d\n", audioFormat->sampleRate);
jd->nports = audioFormat->channels = 2;
audioFormat->bits = 16;
jd->bps = audioFormat->channels *
audioFormat->channels *
audioFormat->sampleRate;
}
static int connect_jack (AudioOutput *audioOutput)
{
JackData *jd = audioOutput->data;
const char **jports;
if ( (jd->client = jack_client_new ("mpd")) == NULL ) {
ERROR ("jack server not running?\n");
return -1;
}
jd->ringbuffer[0] = jack_ringbuffer_create (ringbuf_sz);
jd->ringbuffer[1] = jack_ringbuffer_create (ringbuf_sz);
jack_set_process_callback (jd->client, process, (void *)jd);
jack_set_sample_rate_callback (jd->client, (JackProcessCallback)srate,
(void *)audioOutput);
jack_on_shutdown (jd->client, shutdown_callback, (void *)jd);
if ( jack_activate (jd->client) ) {
ERROR ("cannot activate client");
jack_ringbuffer_free (jd->ringbuffer[0]);
jack_ringbuffer_free (jd->ringbuffer[1]);
return -1;
}
jd->ports[0] = jack_port_register (jd->client, "left",
JACK_DEFAULT_AUDIO_TYPE,
JackPortIsOutput, 0);
if ( !jd->ports[0] ) {
ERROR ("Cannot register output port.\n");
jack_ringbuffer_free (jd->ringbuffer[0]);
jack_ringbuffer_free (jd->ringbuffer[1]);
return -1;
}
jd->ports[1] = jack_port_register (jd->client, "right",
JACK_DEFAULT_AUDIO_TYPE,
JackPortIsOutput, 0);
if ( !jd->ports[1] ) {
ERROR ("Cannot register output port.\n");
jack_ringbuffer_free (jd->ringbuffer[0]);
jack_ringbuffer_free (jd->ringbuffer[1]);
return -1;
}
memset (jd->ringbuffer[0]->buf, 0, jd->ringbuffer[0]->size);
memset (jd->ringbuffer[1]->buf, 0, jd->ringbuffer[1]->size);
/* hay que buscar que hay */
if ( !ports[1] && (jports = jack_get_ports (jd->client, NULL, NULL,
JackPortIsPhysical|
JackPortIsInput)) ) {
ports[0] = (char *) jports[0];
ports[1] = (char *) ( jports[1] ? jports[1] : jports[0] );
ERROR ("jports: %s %s\n", ports[0], ports[1]);
free (jports);
}
if ( ports[1] ) {
if ( (jack_connect (jd->client, "mpd:left", ports[0])) != 0 ) {
ERROR ("%s is not a valid Jack Client / Port ", ports[0]);
jack_ringbuffer_free (jd->ringbuffer[0]);
jack_ringbuffer_free (jd->ringbuffer[1]);
return -1;
}
if ( (jack_connect (jd->client, "mpd:right", ports[1])) != 0 ) {
ERROR ("%s is not a valid Jack Client / Port ", ports[1]);
jack_ringbuffer_free (jd->ringbuffer[0]);
jack_ringbuffer_free (jd->ringbuffer[1]);
return -1;
}
}
ERROR ("connect_jack (pid=%d)\n", getpid ());
return 1;
}
static int jack_initDriver (AudioOutput *audioOutput, ConfigParam *param)
{
BlockParam *bp;
char *endptr;
int val;
char *cp = NULL;
if ( param ) {
bp = getBlockParam (param, "ports");
if ( bp ) {
cp = strdup (bp->value);
ports[0] = strdup (strtok (cp, " ,"));
ports[1] = strdup (strtok (NULL, " ,"));
free (cp);
}
bp = getBlockParam (param, "ringbuffer_size");
if ( bp ) {
errno = 0;
val = strtol (bp->value, &endptr, 10);
if ( errno == 0 && endptr != bp->value) {
ringbuf_sz = val;
ERROR ("ringbuffer_size=%d\n", ringbuf_sz);
} else {
ERROR ("%s is not a number; ringbuf_size=%d\n",
bp->value, ringbuf_sz);
}
}
}
ERROR ("jack_initDriver (pid=%d)\n", getpid ());
return 0;
}
static int jack_testDefault(void)
{
return 0;
}
static int jack_openDevice (AudioOutput *audioOutput)
{
if ( !jd ) {
jd = newJackData ();
audioOutput->data = jd;
if ( !connect_jack (audioOutput) ) {
free (jd);
return -1;
}
}
set_audioformat (audioOutput);
audioOutput->open = 1;
ERROR ("jack_openDevice (pid=%d)!\n", getpid ());
return 0;
}
static void jack_closeDevice(AudioOutput * audioOutput)
{
audioOutput->open = 0;
ERROR ("jack_closeDevice (pid=%d)!\n", getpid ());
}
static void jack_dropBufferedAudio (AudioOutput * audioOutput)
{
}
static int jack_playAudio(AudioOutput * audioOutput, char *buff, int size)
{
JackData *jd = audioOutput->data;
size_t remain = size;
size_t pos = 0;
if ( jd->shutdown ) {
ERROR ("Refusing to play, because there is no client thread.\n");
return 0;
}
if ( jd->our_xrun ) {
ERROR ("xrun\n");
jd->our_xrun = 0;
}
while (remain && !jd->shutdown) {
size_t space;
if ( (space = jack_ringbuffer_write_space (jd->ringbuffer[0]))
> sizeof (jack_default_audio_sample_t) ) {
size_t to_write;
to_write = MIN (space, remain);
remain -= to_write;
to_write /= 4;
//ERROR ("\t\tto_write=%d remain=%d (%d)\n", to_write, remain, to_write * 2 * 2);
while (to_write--) {
jack_default_audio_sample_t sample;
sample = *(short *)(buff + pos);
sample /= 32768;
pos += 2;
jack_ringbuffer_write (jd->ringbuffer[0],
(char *)&sample,
sizeof (sample));
sample = *(short *)(buff + pos);
sample /= 32768;
pos += 2;
jack_ringbuffer_write (jd->ringbuffer[1],
(char *)&sample,
sizeof (sample));
}
} else {
usleep (ringbuf_sz / (float)(jd->bps) * 100000.0);
}
}
return 0;
}
AudioOutputPlugin jackPlugin = {
"jack",
jack_testDefault,
jack_initDriver,
jack_finishDriver,
jack_openDevice,
jack_playAudio,
jack_dropBufferedAudio,
jack_closeDevice,
NULL, /* sendMetadataFunc */
};
#else /* HAVE JACK */
DISABLED_AUDIO_OUTPUT_PLUGIN(jackPlugin)
#endif /* HAVE_JACK */
