-/* $Id$ */
-
/***
This file is part of PulseAudio.
- Copyright 2004-2006 Lennart Poettering
+ Copyright 2004-2008 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
#include "module-null-sink-symdef.h"
-PA_MODULE_AUTHOR("Lennart Poettering")
-PA_MODULE_DESCRIPTION("Clocked NULL sink")
-PA_MODULE_VERSION(PACKAGE_VERSION)
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("Clocked NULL sink");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(FALSE);
PA_MODULE_USAGE(
"format=<sample format> "
"channels=<number of channels> "
"rate=<sample rate> "
- "sink_name=<name of sink>"
- "channel_map=<channel map>"
- "description=<description for the sink>")
+ "sink_name=<name of sink> "
+ "channel_map=<channel map> "
+ "description=<description for the sink>");
#define DEFAULT_SINK_NAME "null"
+#define MAX_LATENCY_USEC (PA_USEC_PER_SEC * 2)
struct userdata {
pa_core *core;
pa_thread_mq thread_mq;
pa_rtpoll *rtpoll;
- size_t block_size;
-
- struct timespec timestamp;
+ pa_usec_t block_usec;
+ pa_usec_t timestamp;
};
static const char* const valid_modargs[] = {
NULL
};
-static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+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;
switch (code) {
case PA_SINK_MESSAGE_SET_STATE:
if (PA_PTR_TO_UINT(data) == PA_SINK_RUNNING)
- pa_rtclock_get(&u->timestamp);
-
+ u->timestamp = pa_rtclock_usec();
+
break;
-
+
case PA_SINK_MESSAGE_GET_LATENCY: {
- struct timespec now;
-
- pa_rtclock_get(&now);
-
- if (pa_timespec_cmp(&u->timestamp, &now) > 0)
- *((pa_usec_t*) data) = 0;
- else
- *((pa_usec_t*) data) = pa_timespec_diff(&u->timestamp, &now);
- break;
+ pa_usec_t now;
+
+ now = pa_rtclock_usec();
+ *((pa_usec_t*) data) = u->timestamp > now ? u->timestamp - now : 0ULL;
+
+ return 0;
}
}
-
+
return pa_sink_process_msg(o, code, data, offset, chunk);
}
+static void sink_update_requested_latency_cb(pa_sink *s) {
+ struct userdata *u;
+
+ pa_sink_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ u->block_usec = pa_sink_get_requested_latency_within_thread(s);
+
+ if (u->block_usec == (pa_usec_t) -1)
+ u->block_usec = s->thread_info.max_latency;
+}
+
+static void process_rewind(struct userdata *u, pa_usec_t now) {
+ size_t rewind_nbytes, in_buffer;
+ pa_usec_t delay;
+
+ pa_assert(u);
+
+ /* Figure out how much we shall rewind and reset the counter */
+ rewind_nbytes = u->sink->thread_info.rewind_nbytes;
+ u->sink->thread_info.rewind_nbytes = 0;
+
+ pa_assert(rewind_nbytes > 0);
+ pa_log_debug("Requested to rewind %lu bytes.", (unsigned long) rewind_nbytes);
+
+ if (u->timestamp <= now)
+ goto do_nothing;
+
+ delay = u->timestamp - now;
+ in_buffer = pa_usec_to_bytes(delay, &u->sink->sample_spec);
+
+ if (in_buffer <= 0)
+ goto do_nothing;
+
+ if (rewind_nbytes > in_buffer)
+ rewind_nbytes = in_buffer;
+
+ pa_sink_process_rewind(u->sink, rewind_nbytes);
+ u->timestamp -= pa_bytes_to_usec(rewind_nbytes, &u->sink->sample_spec);
+
+ pa_log_debug("Rewound %lu bytes.", (unsigned long) rewind_nbytes);
+ return;
+
+do_nothing:
+
+ pa_sink_process_rewind(u->sink, 0);
+}
+
+static void process_render(struct userdata *u, pa_usec_t now) {
+ size_t ate = 0;
+
+ pa_assert(u);
+
+ /* This is the configured latency. Sink inputs connected to us
+ might not have a single frame more than the maxrequest value
+ queed. Hence: at maximum read this many bytes from the sink
+ inputs. */
+
+ /* Fill the buffer up the the latency size */
+ while (u->timestamp < now + u->block_usec) {
+ pa_memchunk chunk;
+
+ pa_sink_render(u->sink, u->sink->thread_info.max_request, &chunk);
+ pa_memblock_unref(chunk.memblock);
+
+/* pa_log_debug("Ate %lu bytes.", (unsigned long) chunk.length); */
+ u->timestamp += pa_bytes_to_usec(chunk.length, &u->sink->sample_spec);
+
+ ate += chunk.length;
+
+ if (ate >= u->sink->thread_info.max_request)
+ break;
+ }
+
+/* pa_log_debug("Ate in sum %lu bytes (of %lu)", (unsigned long) ate, (unsigned long) nbytes); */
+}
+
static void thread_func(void *userdata) {
struct userdata *u = userdata;
pa_thread_mq_install(&u->thread_mq);
pa_rtpoll_install(u->rtpoll);
- pa_rtclock_get(&u->timestamp);
+ u->timestamp = pa_rtclock_usec();
for (;;) {
int ret;
/* Render some data and drop it immediately */
- if (u->sink->thread_info.state == PA_SINK_RUNNING) {
- struct timespec now;
-
- pa_rtclock_get(&now);
-
- if (pa_timespec_cmp(&u->timestamp, &now) <= 0) {
- pa_sink_skip(u->sink, u->block_size);
- pa_timespec_add(&u->timestamp, pa_bytes_to_usec(u->block_size, &u->sink->sample_spec));
+ if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
+ pa_usec_t now;
+
+ now = pa_rtclock_usec();
+
+ if (u->sink->thread_info.rewind_requested) {
+ if (u->sink->thread_info.rewind_nbytes > 0)
+ process_rewind(u, now);
+ else
+ pa_sink_process_rewind(u->sink, 0);
}
- pa_rtpoll_set_timer_absolute(u->rtpoll, &u->timestamp);
+ if (u->timestamp <= now)
+ process_render(u, now);
+
+ pa_rtpoll_set_timer_absolute(u->rtpoll, u->timestamp);
} else
pa_rtpoll_set_timer_disabled(u->rtpoll);
- /* Now give the sink inputs some to time to process their data */
- if ((ret = pa_sink_process_inputs(u->sink)) < 0)
+ /* Hmm, nothing to do. Let's sleep */
+ if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0)
goto fail;
- if (ret > 0)
- continue;
- /* Check whether there is a message for us to process */
- if ((ret = pa_thread_mq_process(&u->thread_mq) < 0))
+ if (ret == 0)
goto finish;
- if (ret > 0)
- continue;
-
- /* Hmm, nothing to do. Let's sleep */
- if (pa_rtpoll_run(u->rtpoll) < 0) {
- pa_log("poll() failed: %s", pa_cstrerror(errno));
- goto fail;
- }
}
fail:
- /* We have to continue processing messages until we receive the
- * SHUTDOWN message */
+ /* 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);
pa_sample_spec ss;
pa_channel_map map;
pa_modargs *ma = NULL;
+ pa_sink_new_data data;
pa_assert(m);
}
ss = m->core->default_sample_spec;
+ map = m->core->default_channel_map;
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");
goto fail;
}
- u = pa_xnew0(struct userdata, 1);
+ m->userdata = u = pa_xnew0(struct userdata, 1);
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, u->thread_mq.inq);
-
- 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.");
+ pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
+
+ 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_DESCRIPTION, pa_modargs_get_value(ma, "description", "Null Output"));
+ pa_proplist_sets(data.proplist, PA_PROP_DEVICE_CLASS, "abstract");
+
+ 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 object.");
goto fail;
}
u->sink->parent.process_msg = sink_process_msg;
+ u->sink->update_requested_latency = sink_update_requested_latency_cb;
u->sink->userdata = u;
- 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->block_size = pa_bytes_per_second(&ss) / 20; /* 50 ms */
- if (u->block_size <= 0)
- u->block_size = pa_frame_size(&ss);
-
+ pa_sink_set_latency_range(u->sink, (pa_usec_t) -1, MAX_LATENCY_USEC);
+ u->block_usec = u->sink->thread_info.max_latency;
+
+ u->sink->thread_info.max_rewind =
+ u->sink->thread_info.max_request =
+ pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
+
if (!(u->thread = pa_thread_new(thread_func, u))) {
pa_log("Failed to create thread.");
goto fail;
}
pa_sink_put(u->sink);
-
+
pa_modargs_free(ma);
return 0;
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;
if (u->rtpoll)
pa_rtpoll_free(u->rtpoll);
-
+
pa_xfree(u);
}