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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 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 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 "iochannel.h"
#include "source.h"
#include "module.h"
#include "util.h"
#include "modargs.h"
#include "xmalloc.h"
#include "log.h"
PA_MODULE_AUTHOR("Lennart Poettering")
PA_MODULE_DESCRIPTION("UNIX pipe source")
PA_MODULE_VERSION(PACKAGE_VERSION)
PA_MODULE_USAGE("source_name=<name for the source> file=<path of the FIFO> format=<sample format> channels=<number of channels> rate=<sample rate>")
#define DEFAULT_FIFO_NAME "/tmp/music.input"
#define DEFAULT_SOURCE_NAME "fifo_input"
struct userdata {
struct pa_core *core;
char *filename;
struct pa_source *source;
struct pa_iochannel *io;
struct pa_module *module;
struct pa_memchunk chunk;
};
static const char* const valid_modargs[] = {
"file",
"rate",
"channels",
"format",
"source_name",
NULL
};
static void do_read(struct userdata *u) {
ssize_t r;
struct pa_memchunk chunk;
assert(u);
if (!pa_iochannel_is_readable(u->io))
return;
pa_module_set_used(u->module, pa_idxset_ncontents(u->source->outputs));
if (!u->chunk.memblock) {
u->chunk.memblock = pa_memblock_new(1024, u->core->memblock_stat);
u->chunk.index = chunk.length = 0;
}
assert(u->chunk.memblock && u->chunk.memblock->length > u->chunk.index);
if ((r = pa_iochannel_read(u->io, (uint8_t*) u->chunk.memblock->data + u->chunk.index, u->chunk.memblock->length - u->chunk.index)) <= 0) {
pa_log(__FILE__": read() failed: %s\n", strerror(errno));
return;
}
u->chunk.length = r;
pa_source_post(u->source, &u->chunk);
u->chunk.index += r;
if (u->chunk.index >= u->chunk.memblock->length) {
u->chunk.index = u->chunk.length = 0;
pa_memblock_unref(u->chunk.memblock);
u->chunk.memblock = NULL;
}
}
static void io_callback(struct pa_iochannel *io, void*userdata) {
struct userdata *u = userdata;
assert(u);
do_read(u);
}
int pa__init(struct pa_core *c, struct pa_module*m) {
struct userdata *u = NULL;
struct stat st;
const char *p;
int fd = -1;
struct pa_sample_spec ss;
struct pa_modargs *ma = NULL;
assert(c && m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log(__FILE__": failed to parse module arguments\n");
goto fail;
}
ss = c->default_sample_spec;
if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
pa_log(__FILE__": invalid sample format specification\n");
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\n", p, strerror(errno));
goto fail;
}
pa_fd_set_cloexec(fd, 1);
if (fstat(fd, &st) < 0) {
pa_log(__FILE__": fstat('%s'): %s\n", p, strerror(errno));
goto fail;
}
if (!S_ISFIFO(st.st_mode)) {
pa_log(__FILE__": '%s' is not a FIFO.\n", p);
goto fail;
}
u = pa_xmalloc0(sizeof(struct userdata));
u->filename = pa_xstrdup(p);
u->core = c;
if (!(u->source = pa_source_new(c, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss))) {
pa_log(__FILE__": failed to create source.\n");
goto fail;
}
u->source->userdata = u;
pa_source_set_owner(u->source, m);
u->source->description = pa_sprintf_malloc("Unix FIFO source '%s'", p);
assert(u->source->description);
u->io = pa_iochannel_new(c->mainloop, fd, -1);
assert(u->io);
pa_iochannel_set_callback(u->io, io_callback, u);
u->chunk.memblock = NULL;
u->chunk.index = u->chunk.length = 0;
u->module = m;
m->userdata = u;
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(struct pa_core *c, struct pa_module*m) {
struct userdata *u;
assert(c && m);
if (!(u = m->userdata))
return;
if (u->chunk.memblock)
pa_memblock_unref(u->chunk.memblock);
pa_source_disconnect(u->source);
pa_source_unref(u->source);
pa_iochannel_free(u->io);
assert(u->filename);
unlink(u->filename);
pa_xfree(u->filename);
pa_xfree(u);
}
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