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