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-rw-r--r--src/modules/jack/module-jack-sink.c525
1 files changed, 525 insertions, 0 deletions
diff --git a/src/modules/jack/module-jack-sink.c b/src/modules/jack/module-jack-sink.c
new file mode 100644
index 0000000..effa0dd
--- /dev/null
+++ b/src/modules/jack/module-jack-sink.c
@@ -0,0 +1,525 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2006 Lennart Poettering
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of the License,
+ or (at your option) any later version.
+
+ PulseAudio 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 Lesser General Public License
+ along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <jack/jack.h>
+
+#include <pulse/util.h>
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/sink.h>
+#include <pulsecore/module.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/thread.h>
+#include <pulsecore/thread-mq.h>
+#include <pulsecore/rtpoll.h>
+#include <pulsecore/sample-util.h>
+
+/* General overview:
+ *
+ * Because JACK has a very inflexible event loop management which
+ * doesn't allow us to add our own event sources to the event thread
+ * we cannot use the JACK real-time thread for dispatching our PA
+ * work. Instead, we run an additional RT thread which does most of
+ * the PA handling, and have the JACK RT thread request data from it
+ * via pa_asyncmsgq. The cost is an additional context switch which
+ * should hopefully not be that expensive if RT scheduling is
+ * enabled. A better fix would only be possible with additional event
+ * source support in JACK.
+ */
+
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("JACK Sink");
+PA_MODULE_LOAD_ONCE(false);
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_USAGE(
+ "sink_name=<name for the sink> "
+ "sink_properties=<properties for the card> "
+ "server_name=<jack server name> "
+ "client_name=<jack client name> "
+ "channels=<number of channels> "
+ "channel_map=<channel map> "
+ "connect=<connect ports?>");
+
+#define DEFAULT_SINK_NAME "jack_out"
+
+struct userdata {
+ pa_core *core;
+ pa_module *module;
+ pa_sink *sink;
+
+ unsigned channels;
+
+ jack_port_t* port[PA_CHANNELS_MAX];
+ jack_client_t *client;
+
+ void *buffer[PA_CHANNELS_MAX];
+
+ pa_thread_mq thread_mq;
+ pa_asyncmsgq *jack_msgq;
+ pa_rtpoll *rtpoll;
+ pa_rtpoll_item *rtpoll_item;
+
+ pa_thread *thread;
+
+ jack_nframes_t frames_in_buffer;
+ jack_nframes_t saved_frame_time;
+ bool saved_frame_time_valid;
+};
+
+static const char* const valid_modargs[] = {
+ "sink_name",
+ "sink_properties",
+ "server_name",
+ "client_name",
+ "channels",
+ "channel_map",
+ "connect",
+ NULL
+};
+
+enum {
+ SINK_MESSAGE_RENDER = PA_SINK_MESSAGE_MAX,
+ SINK_MESSAGE_BUFFER_SIZE,
+ SINK_MESSAGE_ON_SHUTDOWN
+};
+
+static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *memchunk) {
+ struct userdata *u = PA_SINK(o)->userdata;
+
+ switch (code) {
+
+ case SINK_MESSAGE_RENDER:
+
+ /* Handle the request from the JACK thread */
+
+ if (u->sink->thread_info.state == PA_SINK_RUNNING) {
+ pa_memchunk chunk;
+ size_t nbytes;
+ void *p;
+
+ pa_assert(offset > 0);
+ nbytes = (size_t) offset * pa_frame_size(&u->sink->sample_spec);
+
+ pa_sink_render_full(u->sink, nbytes, &chunk);
+
+ p = pa_memblock_acquire_chunk(&chunk);
+ pa_deinterleave(p, u->buffer, u->channels, sizeof(float), (unsigned) offset);
+ pa_memblock_release(chunk.memblock);
+
+ pa_memblock_unref(chunk.memblock);
+ } else {
+ unsigned c;
+ pa_sample_spec ss;
+
+ /* Humm, we're not RUNNING, hence let's write some silence */
+ /* This can happen if we're paused, or during shutdown (when we're unlinked but jack is still running). */
+
+ ss = u->sink->sample_spec;
+ ss.channels = 1;
+
+ for (c = 0; c < u->channels; c++)
+ pa_silence_memory(u->buffer[c], (size_t) offset * pa_sample_size(&ss), &ss);
+ }
+
+ u->frames_in_buffer = (jack_nframes_t) offset;
+ u->saved_frame_time = * (jack_nframes_t*) data;
+ u->saved_frame_time_valid = true;
+
+ return 0;
+
+ case SINK_MESSAGE_BUFFER_SIZE:
+ pa_sink_set_max_request_within_thread(u->sink, (size_t) offset * pa_frame_size(&u->sink->sample_spec));
+ return 0;
+
+ case SINK_MESSAGE_ON_SHUTDOWN:
+ pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
+ return 0;
+
+ case PA_SINK_MESSAGE_GET_LATENCY: {
+ jack_nframes_t ft, d;
+ jack_latency_range_t r;
+ size_t n;
+ int32_t number_of_frames;
+
+ /* This is the "worst-case" latency */
+ jack_port_get_latency_range(u->port[0], JackPlaybackLatency, &r);
+ number_of_frames = r.max + u->frames_in_buffer;
+
+ if (u->saved_frame_time_valid) {
+ /* Adjust the worst case latency by the time that
+ * passed since we last handed data to JACK */
+
+ ft = jack_frame_time(u->client);
+ d = ft > u->saved_frame_time ? ft - u->saved_frame_time : 0;
+ number_of_frames -= d;
+ }
+
+ /* Convert it to usec */
+ if (number_of_frames > 0) {
+ n = number_of_frames * pa_frame_size(&u->sink->sample_spec);
+ *((int64_t*) data) = pa_bytes_to_usec(n, &u->sink->sample_spec);
+ } else {
+ n = - number_of_frames * pa_frame_size(&u->sink->sample_spec);
+ *((int64_t*) data) = - (int64_t)pa_bytes_to_usec(n, &u->sink->sample_spec);
+ }
+
+ return 0;
+ }
+
+ }
+
+ return pa_sink_process_msg(o, code, data, offset, memchunk);
+}
+
+/* JACK Callback: This is called when JACK needs some data */
+static int jack_process(jack_nframes_t nframes, void *arg) {
+ struct userdata *u = arg;
+ unsigned c;
+ jack_nframes_t frame_time;
+ pa_assert(u);
+
+ /* We just forward the request to our other RT thread */
+
+ for (c = 0; c < u->channels; c++)
+ pa_assert_se(u->buffer[c] = jack_port_get_buffer(u->port[c], nframes));
+
+ frame_time = jack_frame_time(u->client);
+
+ pa_assert_se(pa_asyncmsgq_send(u->jack_msgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_RENDER, &frame_time, nframes, NULL) == 0);
+ return 0;
+}
+
+static void thread_func(void *userdata) {
+ struct userdata *u = userdata;
+
+ pa_assert(u);
+
+ pa_log_debug("Thread starting up");
+
+ if (u->core->realtime_scheduling)
+ pa_thread_make_realtime(u->core->realtime_priority);
+
+ pa_thread_mq_install(&u->thread_mq);
+
+ for (;;) {
+ int ret;
+
+ if (PA_UNLIKELY(u->sink->thread_info.rewind_requested))
+ pa_sink_process_rewind(u->sink, 0);
+
+ if ((ret = pa_rtpoll_run(u->rtpoll)) < 0)
+ goto fail;
+
+ if (ret == 0)
+ goto finish;
+ }
+
+fail:
+ /* If this was no regular exit from the loop we have to continue
+ * processing messages until we received PA_MESSAGE_SHUTDOWN */
+ pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
+ pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
+
+finish:
+ pa_log_debug("Thread shutting down");
+}
+
+/* JACK Callback: This is called when JACK triggers an error */
+static void jack_error_func(const char*t) {
+ char *s;
+
+ s = pa_xstrndup(t, strcspn(t, "\n\r"));
+ pa_log_warn("JACK error >%s<", s);
+ pa_xfree(s);
+}
+
+/* JACK Callback: This is called when JACK is set up */
+static void jack_init(void *arg) {
+ struct userdata *u = arg;
+
+ pa_log_info("JACK thread starting up.");
+
+ if (u->core->realtime_scheduling)
+ pa_thread_make_realtime(u->core->realtime_priority+4);
+}
+
+/* JACK Callback: This is called when JACK kicks us */
+static void jack_shutdown(void* arg) {
+ struct userdata *u = arg;
+
+ pa_log_info("JACK thread shutting down.");
+ pa_asyncmsgq_post(u->jack_msgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_ON_SHUTDOWN, NULL, 0, NULL, NULL);
+}
+
+/* JACK Callback: This is called when JACK changes the buffer size */
+static int jack_buffer_size(jack_nframes_t nframes, void *arg) {
+ struct userdata *u = arg;
+
+ pa_log_info("JACK buffer size changed.");
+ pa_asyncmsgq_post(u->jack_msgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_BUFFER_SIZE, NULL, nframes, NULL, NULL);
+ return 0;
+}
+
+int pa__init(pa_module*m) {
+ struct userdata *u = NULL;
+ pa_sample_spec ss;
+ pa_channel_map map;
+ pa_modargs *ma = NULL;
+ jack_status_t status;
+ const char *server_name, *client_name;
+ uint32_t channels = 0;
+ bool do_connect = true;
+ unsigned i;
+ const char **ports = NULL, **p;
+ pa_sink_new_data data;
+ jack_latency_range_t r;
+ size_t n;
+
+ pa_assert(m);
+
+ jack_set_error_function(jack_error_func);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log("Failed to parse module arguments.");
+ goto fail;
+ }
+
+ if (pa_modargs_get_value_boolean(ma, "connect", &do_connect) < 0) {
+ pa_log("Failed to parse connect= argument.");
+ goto fail;
+ }
+
+ server_name = pa_modargs_get_value(ma, "server_name", NULL);
+ client_name = pa_modargs_get_value(ma, "client_name", "PulseAudio JACK Sink");
+
+ m->userdata = u = pa_xnew0(struct userdata, 1);
+ u->core = m->core;
+ u->module = m;
+ u->saved_frame_time_valid = false;
+ u->rtpoll = pa_rtpoll_new();
+
+ if (pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll) < 0) {
+ pa_log("pa_thread_mq_init() failed.");
+ goto fail;
+ }
+
+ /* The queue linking the JACK thread and our RT thread */
+ u->jack_msgq = pa_asyncmsgq_new(0);
+ if (!u->jack_msgq) {
+ pa_log("pa_asyncmsgq_new() failed.");
+ goto fail;
+ }
+
+ /* The msgq from the JACK RT thread should have an even higher
+ * priority than the normal message queues, to match the guarantee
+ * all other drivers make: supplying the audio device with data is
+ * the top priority -- and as long as that is possible we don't do
+ * anything else */
+ u->rtpoll_item = pa_rtpoll_item_new_asyncmsgq_read(u->rtpoll, PA_RTPOLL_EARLY-1, u->jack_msgq);
+
+ if (!(u->client = jack_client_open(client_name, server_name ? JackServerName : JackNullOption, &status, server_name))) {
+ pa_log("jack_client_open() failed.");
+ goto fail;
+ }
+
+ ports = jack_get_ports(u->client, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortIsPhysical|JackPortIsInput);
+
+ channels = 0;
+ if (ports)
+ for (p = ports; *p; p++)
+ channels++;
+
+ if (!channels)
+ channels = m->core->default_sample_spec.channels;
+
+ if (pa_modargs_get_value_u32(ma, "channels", &channels) < 0 ||
+ !pa_channels_valid(channels)) {
+ pa_log("Failed to parse channels= argument.");
+ goto fail;
+ }
+
+ if (channels == m->core->default_channel_map.channels)
+ map = m->core->default_channel_map;
+ else
+ pa_channel_map_init_extend(&map, channels, PA_CHANNEL_MAP_ALSA);
+
+ if (pa_modargs_get_channel_map(ma, NULL, &map) < 0 || map.channels != channels) {
+ pa_log("Failed to parse channel_map= argument.");
+ goto fail;
+ }
+
+ pa_log_info("Successfully connected as '%s'", jack_get_client_name(u->client));
+
+ u->channels = ss.channels = (uint8_t) channels;
+ ss.rate = jack_get_sample_rate(u->client);
+ ss.format = PA_SAMPLE_FLOAT32NE;
+
+ pa_assert(pa_sample_spec_valid(&ss));
+
+ for (i = 0; i < ss.channels; i++) {
+ if (!(u->port[i] = jack_port_register(u->client, pa_channel_position_to_string(map.map[i]), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput|JackPortIsTerminal, 0))) {
+ pa_log("jack_port_register() failed.");
+ goto fail;
+ }
+ }
+
+ pa_sink_new_data_init(&data);
+ data.driver = __FILE__;
+ data.module = m;
+ pa_sink_new_data_set_name(&data, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
+ pa_sink_new_data_set_sample_spec(&data, &ss);
+ pa_sink_new_data_set_channel_map(&data, &map);
+ pa_proplist_sets(data.proplist, PA_PROP_DEVICE_API, "jack");
+ if (server_name)
+ pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, server_name);
+ pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Jack sink (%s)", jack_get_client_name(u->client));
+ pa_proplist_sets(data.proplist, "jack.client_name", jack_get_client_name(u->client));
+
+ if (pa_modargs_get_proplist(ma, "sink_properties", data.proplist, PA_UPDATE_REPLACE) < 0) {
+ pa_log("Invalid properties");
+ pa_sink_new_data_done(&data);
+ goto fail;
+ }
+
+ u->sink = pa_sink_new(m->core, &data, PA_SINK_LATENCY);
+ pa_sink_new_data_done(&data);
+
+ if (!u->sink) {
+ pa_log("Failed to create sink.");
+ goto fail;
+ }
+
+ u->sink->parent.process_msg = sink_process_msg;
+ u->sink->userdata = u;
+
+ pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
+ pa_sink_set_rtpoll(u->sink, u->rtpoll);
+ pa_sink_set_max_request(u->sink, jack_get_buffer_size(u->client) * pa_frame_size(&u->sink->sample_spec));
+
+ jack_set_process_callback(u->client, jack_process, u);
+ jack_on_shutdown(u->client, jack_shutdown, u);
+ jack_set_thread_init_callback(u->client, jack_init, u);
+ jack_set_buffer_size_callback(u->client, jack_buffer_size, u);
+
+ if (!(u->thread = pa_thread_new("jack-sink", thread_func, u))) {
+ pa_log("Failed to create thread.");
+ goto fail;
+ }
+
+ if (jack_activate(u->client)) {
+ pa_log("jack_activate() failed");
+ goto fail;
+ }
+
+ if (do_connect) {
+ for (i = 0, p = ports; i < ss.channels; i++, p++) {
+
+ if (!p || !*p) {
+ pa_log("Not enough physical output ports, leaving unconnected.");
+ break;
+ }
+
+ pa_log_info("Connecting %s to %s", jack_port_name(u->port[i]), *p);
+
+ if (jack_connect(u->client, jack_port_name(u->port[i]), *p)) {
+ pa_log("Failed to connect %s to %s, leaving unconnected.", jack_port_name(u->port[i]), *p);
+ break;
+ }
+ }
+ }
+
+ jack_port_get_latency_range(u->port[0], JackPlaybackLatency, &r);
+ n = r.max * pa_frame_size(&u->sink->sample_spec);
+ pa_sink_set_fixed_latency(u->sink, pa_bytes_to_usec(n, &u->sink->sample_spec));
+ pa_sink_put(u->sink);
+
+ if (ports)
+ jack_free(ports);
+ pa_modargs_free(ma);
+
+ return 0;
+
+fail:
+ if (ma)
+ pa_modargs_free(ma);
+
+ if (ports)
+ jack_free(ports);
+
+ pa__done(m);
+
+ return -1;
+}
+
+int pa__get_n_used(pa_module *m) {
+ struct userdata *u;
+
+ pa_assert(m);
+ pa_assert_se(u = m->userdata);
+
+ return pa_sink_linked_by(u->sink);
+}
+
+void pa__done(pa_module*m) {
+ struct userdata *u;
+
+ pa_assert(m);
+
+ if (!(u = m->userdata))
+ return;
+
+ if (u->sink)
+ pa_sink_unlink(u->sink);
+
+ if (u->client)
+ jack_client_close(u->client);
+
+ if (u->thread) {
+ pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
+ pa_thread_free(u->thread);
+ }
+
+ pa_thread_mq_done(&u->thread_mq);
+
+ if (u->sink)
+ pa_sink_unref(u->sink);
+
+ if (u->rtpoll_item)
+ pa_rtpoll_item_free(u->rtpoll_item);
+
+ if (u->jack_msgq)
+ pa_asyncmsgq_unref(u->jack_msgq);
+
+ if (u->rtpoll)
+ pa_rtpoll_free(u->rtpoll);
+
+ pa_xfree(u);
+}
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