/***
This file is part of PulseAudio.
+ Copyright 2004-2006 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 of the License,
#include <stdlib.h>
#include <sys/stat.h>
#include <stdio.h>
-#include <assert.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <pulse/timeval.h>
#include <pulse/xmalloc.h>
-#include <pulsecore/iochannel.h>
+#include <pulsecore/macro.h>
#include <pulsecore/sink.h>
#include <pulsecore/module.h>
#include <pulsecore/core-util.h>
+#include <pulsecore/core-error.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
+#include <pulsecore/thread.h>
+#include <pulsecore/thread-mq.h>
+#include <pulsecore/rtpoll.h>
+#include <pulsecore/rtclock.h>
#include "module-null-sink-symdef.h"
pa_core *core;
pa_module *module;
pa_sink *sink;
- pa_time_event *time_event;
+
+ pa_thread *thread;
+ pa_thread_mq thread_mq;
+ pa_rtpoll *rtpoll;
+
size_t block_size;
- uint64_t n_bytes;
- struct timeval start_time;
+ struct timeval timestamp;
};
static const char* const valid_modargs[] = {
NULL
};
-static void time_callback(pa_mainloop_api *m, pa_time_event*e, const struct timeval *tv, void *userdata) {
- struct userdata *u = userdata;
- pa_memchunk chunk;
- struct timeval ntv = *tv;
- size_t l;
+static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+ struct userdata *u = PA_SINK(o)->userdata;
- assert(u);
+ switch (code) {
+ case PA_SINK_MESSAGE_SET_STATE:
- if (pa_sink_render(u->sink, u->block_size, &chunk) >= 0) {
- l = chunk.length;
- pa_memblock_unref(chunk.memblock);
- } else
- l = u->block_size;
+ if (PA_PTR_TO_UINT(data) == PA_SINK_RUNNING)
+ pa_rtclock_get(&u->timestamp);
- pa_timeval_add(&ntv, pa_bytes_to_usec(l, &u->sink->sample_spec));
- m->time_restart(e, &ntv);
+ break;
+
+ case PA_SINK_MESSAGE_GET_LATENCY: {
+ struct timeval now;
+
+ pa_rtclock_get(&now);
+
+ if (pa_timeval_cmp(&u->timestamp, &now) > 0)
+ *((pa_usec_t*) data) = 0;
+ else
+ *((pa_usec_t*) data) = pa_timeval_diff(&u->timestamp, &now);
+ break;
+ }
+ }
- u->n_bytes += l;
+ return pa_sink_process_msg(o, code, data, offset, chunk);
}
-static pa_usec_t get_latency(pa_sink *s) {
- struct userdata *u = s->userdata;
- pa_usec_t a, b;
- struct timeval now;
+static void thread_func(void *userdata) {
+ struct userdata *u = userdata;
+
+ pa_assert(u);
+
+ pa_log_debug("Thread starting up");
+
+ pa_thread_mq_install(&u->thread_mq);
+ pa_rtpoll_install(u->rtpoll);
+
+ pa_rtclock_get(&u->timestamp);
+
+ for (;;) {
+ int ret;
+
+ /* Render some data and drop it immediately */
+ if (u->sink->thread_info.state == PA_SINK_RUNNING) {
+ struct timeval now;
- a = pa_timeval_diff(pa_gettimeofday(&now), &u->start_time);
- b = pa_bytes_to_usec(u->n_bytes, &s->sample_spec);
+ pa_rtclock_get(&now);
- return b > a ? b - a : 0;
+ if (pa_timeval_cmp(&u->timestamp, &now) <= 0) {
+ pa_sink_skip(u->sink, u->block_size);
+ pa_timeval_add(&u->timestamp, pa_bytes_to_usec(u->block_size, &u->sink->sample_spec));
+ }
+
+ pa_rtpoll_set_timer_absolute(u->rtpoll, &u->timestamp);
+ } else
+ pa_rtpoll_set_timer_disabled(u->rtpoll);
+
+ /* Hmm, nothing to do. Let's sleep */
+ if ((ret = pa_rtpoll_run(u->rtpoll, 1)) < 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");
}
-int pa__init(pa_core *c, pa_module*m) {
+int pa__init(pa_module*m) {
struct userdata *u = NULL;
pa_sample_spec ss;
pa_channel_map map;
pa_modargs *ma = NULL;
- assert(c);
- assert(m);
+ pa_assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
- pa_log("failed to parse module arguments.");
+ pa_log("Failed to parse module arguments.");
goto fail;
}
- ss = c->default_sample_spec;
+ ss = m->core->default_sample_spec;
if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
- pa_log("invalid sample format specification or channel map.");
+ pa_log("Invalid sample format specification or channel map");
goto fail;
}
u = pa_xnew0(struct userdata, 1);
- u->core = c;
+ u->core = m->core;
u->module = m;
m->userdata = u;
+ pa_thread_mq_init(&u->thread_mq, m->core->mainloop);
+ u->rtpoll = pa_rtpoll_new();
+ pa_rtpoll_item_new_asyncmsgq(u->rtpoll, PA_RTPOLL_EARLY, u->thread_mq.inq);
- if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, &map))) {
- pa_log("failed to create sink.");
+ if (!(u->sink = pa_sink_new(m->core, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, &map))) {
+ pa_log("Failed to create sink.");
goto fail;
}
- u->sink->get_latency = get_latency;
+ u->sink->parent.process_msg = sink_process_msg;
u->sink->userdata = u;
- pa_sink_set_owner(u->sink, m);
+ u->sink->flags = PA_SINK_LATENCY;
+
+ pa_sink_set_module(u->sink, m);
+ pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
+ pa_sink_set_rtpoll(u->sink, u->rtpoll);
pa_sink_set_description(u->sink, pa_modargs_get_value(ma, "description", "NULL sink"));
- u->n_bytes = 0;
- pa_gettimeofday(&u->start_time);
+ u->block_size = pa_bytes_per_second(&ss) / 20; /* 50 ms */
+ if (u->block_size <= 0)
+ u->block_size = pa_frame_size(&ss);
- u->time_event = c->mainloop->time_new(c->mainloop, &u->start_time, time_callback, u);
+ if (!(u->thread = pa_thread_new(thread_func, u))) {
+ pa_log("Failed to create thread.");
+ goto fail;
+ }
- u->block_size = pa_bytes_per_second(&ss) / 10;
+ pa_sink_put(u->sink);
pa_modargs_free(ma);
if (ma)
pa_modargs_free(ma);
- pa__done(c, m);
+ pa__done(m);
return -1;
}
-void pa__done(pa_core *c, pa_module*m) {
+void pa__done(pa_module*m) {
struct userdata *u;
- assert(c && m);
+
+ pa_assert(m);
if (!(u = m->userdata))
return;
- pa_sink_disconnect(u->sink);
- pa_sink_unref(u->sink);
+ if (u->sink)
+ pa_sink_unlink(u->sink);
+
+ 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);
- u->core->mainloop->time_free(u->time_event);
+ if (u->rtpoll)
+ pa_rtpoll_free(u->rtpoll);
pa_xfree(u);
}