renamed src/audioOutputs/ to src/output/

Again, no CamelCase in the directory name.

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 */