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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio 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,
or (at your option) any later version.
polypaudio 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 polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <sys/stat.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
#include <polypcore/iochannel.h>
#include <polypcore/sink.h>
#include <polypcore/module.h>
#include <polypcore/util.h>
#include <polypcore/modargs.h>
#include <polypcore/xmalloc.h>
#include <polypcore/log.h>
#include "module-pipe-sink-symdef.h"
PA_MODULE_AUTHOR("Lennart Poettering")
PA_MODULE_DESCRIPTION("UNIX pipe sink")
PA_MODULE_VERSION(PACKAGE_VERSION)
PA_MODULE_USAGE("sink_name=<name for the sink> file=<path of the FIFO> format=<sample format> channels=<number of channels> rate=<sample rate>")
#define DEFAULT_FIFO_NAME "/tmp/music.output"
#define DEFAULT_SINK_NAME "fifo_output"
struct userdata {
pa_core *core;
char *filename;
pa_sink *sink;
pa_iochannel *io;
pa_defer_event *defer_event;
pa_memchunk memchunk;
pa_module *module;
};
static const char* const valid_modargs[] = {
"file",
"rate",
"format",
"channels",
"sink_name",
NULL
};
static void do_write(struct userdata *u) {
ssize_t r;
assert(u);
u->core->mainloop->defer_enable(u->defer_event, 0);
if (!pa_iochannel_is_writable(u->io))
return;
pa_module_set_used(u->module, pa_idxset_size(u->sink->inputs) + pa_idxset_size(u->sink->monitor_source->outputs));
if (!u->memchunk.length)
if (pa_sink_render(u->sink, PIPE_BUF, &u->memchunk) < 0)
return;
assert(u->memchunk.memblock && u->memchunk.length);
if ((r = pa_iochannel_write(u->io, (uint8_t*) u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length)) < 0) {
pa_log(__FILE__": write() failed: %s", strerror(errno));
return;
}
u->memchunk.index += r;
u->memchunk.length -= r;
if (u->memchunk.length <= 0) {
pa_memblock_unref(u->memchunk.memblock);
u->memchunk.memblock = NULL;
}
}
static void notify_cb(pa_sink*s) {
struct userdata *u = s->userdata;
assert(s && u);
if (pa_iochannel_is_writable(u->io))
u->core->mainloop->defer_enable(u->defer_event, 1);
}
static pa_usec_t get_latency_cb(pa_sink *s) {
struct userdata *u = s->userdata;
assert(s && u);
return u->memchunk.memblock ? pa_bytes_to_usec(u->memchunk.length, &s->sample_spec) : 0;
}
static void defer_callback(PA_GCC_UNUSED pa_mainloop_api *m, PA_GCC_UNUSED pa_defer_event*e, void *userdata) {
struct userdata *u = userdata;
assert(u);
do_write(u);
}
static void io_callback(PA_GCC_UNUSED pa_iochannel *io, void*userdata) {
struct userdata *u = userdata;
assert(u);
do_write(u);
}
int pa__init(pa_core *c, pa_module*m) {
struct userdata *u = NULL;
struct stat st;
const char *p;
int fd = -1;
pa_sample_spec ss;
pa_modargs *ma = NULL;
assert(c && m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log(__FILE__": failed to parse module arguments");
goto fail;
}
ss = c->default_sample_spec;
if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
pa_log(__FILE__": invalid sample format specification");
goto fail;
}
mkfifo(p = pa_modargs_get_value(ma, "file", DEFAULT_FIFO_NAME), 0777);
if ((fd = open(p, O_RDWR)) < 0) {
pa_log(__FILE__": open('%s'): %s", p, strerror(errno));
goto fail;
}
pa_fd_set_cloexec(fd, 1);
if (fstat(fd, &st) < 0) {
pa_log(__FILE__": fstat('%s'): %s", p, strerror(errno));
goto fail;
}
if (!S_ISFIFO(st.st_mode)) {
pa_log(__FILE__": '%s' is not a FIFO.", p);
goto fail;
}
u = pa_xmalloc0(sizeof(struct userdata));
u->filename = pa_xstrdup(p);
u->core = c;
u->module = m;
m->userdata = u;
if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, NULL))) {
pa_log(__FILE__": failed to create sink.");
goto fail;
}
u->sink->notify = notify_cb;
u->sink->get_latency = get_latency_cb;
u->sink->userdata = u;
pa_sink_set_owner(u->sink, m);
u->sink->description = pa_sprintf_malloc("Unix FIFO sink '%s'", p);
assert(u->sink->description);
u->io = pa_iochannel_new(c->mainloop, -1, fd);
assert(u->io);
pa_iochannel_set_callback(u->io, io_callback, u);
u->memchunk.memblock = NULL;
u->memchunk.length = 0;
u->defer_event = c->mainloop->defer_new(c->mainloop, defer_callback, u);
assert(u->defer_event);
c->mainloop->defer_enable(u->defer_event, 0);
pa_modargs_free(ma);
return 0;
fail:
if (ma)
pa_modargs_free(ma);
if (fd >= 0)
close(fd);
pa__done(c, m);
return -1;
}
void pa__done(pa_core *c, pa_module*m) {
struct userdata *u;
assert(c && m);
if (!(u = m->userdata))
return;
if (u->memchunk.memblock)
pa_memblock_unref(u->memchunk.memblock);
pa_sink_disconnect(u->sink);
pa_sink_unref(u->sink);
pa_iochannel_free(u->io);
u->core->mainloop->defer_free(u->defer_event);
assert(u->filename);
unlink(u->filename);
pa_xfree(u->filename);
pa_xfree(u);
}
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