4 This file is part of PulseAudio.
6 Copyright 2004-2006 Lennart Poettering
8 PulseAudio is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published
10 by the Free Software Foundation; either version 2 of the License,
11 or (at your option) any later version.
13 PulseAudio is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with PulseAudio; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
38 #include <pulse/xmalloc.h>
40 #include <pulsecore/core-error.h>
41 #include <pulsecore/iochannel.h>
42 #include <pulsecore/sink.h>
43 #include <pulsecore/module.h>
44 #include <pulsecore/core-util.h>
45 #include <pulsecore/modargs.h>
46 #include <pulsecore/log.h>
48 #include "module-pipe-sink-symdef.h"
50 PA_MODULE_AUTHOR("Lennart Poettering")
51 PA_MODULE_DESCRIPTION("UNIX pipe sink")
52 PA_MODULE_VERSION(PACKAGE_VERSION)
54 "sink_name=<name for the sink> "
55 "file=<path of the FIFO> "
56 "format=<sample format> "
57 "channels=<number of channels> "
59 "channel_map=<channel map>")
61 #define DEFAULT_FIFO_NAME "/tmp/music.output"
62 #define DEFAULT_SINK_NAME "fifo_output"
71 pa_defer_event *defer_event;
77 static const char* const valid_modargs[] = {
87 static void do_write(struct userdata *u) {
91 u->core->mainloop->defer_enable(u->defer_event, 0);
93 if (!pa_iochannel_is_writable(u->io))
96 pa_module_set_used(u->module, pa_sink_used_by(u->sink));
98 if (!u->memchunk.length)
99 if (pa_sink_render(u->sink, PIPE_BUF, &u->memchunk) < 0)
102 assert(u->memchunk.memblock && u->memchunk.length);
104 if ((r = pa_iochannel_write(u->io, (uint8_t*) u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length)) < 0) {
105 pa_log("write(): %s", pa_cstrerror(errno));
109 u->memchunk.index += r;
110 u->memchunk.length -= r;
112 if (u->memchunk.length <= 0) {
113 pa_memblock_unref(u->memchunk.memblock);
114 u->memchunk.memblock = NULL;
118 static void notify_cb(pa_sink*s) {
119 struct userdata *u = s->userdata;
122 if (pa_iochannel_is_writable(u->io))
123 u->core->mainloop->defer_enable(u->defer_event, 1);
126 static pa_usec_t get_latency_cb(pa_sink *s) {
127 struct userdata *u = s->userdata;
130 return u->memchunk.memblock ? pa_bytes_to_usec(u->memchunk.length, &s->sample_spec) : 0;
133 static void defer_callback(PA_GCC_UNUSED pa_mainloop_api *m, PA_GCC_UNUSED pa_defer_event*e, void *userdata) {
134 struct userdata *u = userdata;
139 static void io_callback(PA_GCC_UNUSED pa_iochannel *io, void*userdata) {
140 struct userdata *u = userdata;
145 int pa__init(pa_core *c, pa_module*m) {
146 struct userdata *u = NULL;
152 pa_modargs *ma = NULL;
157 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
158 pa_log("failed to parse module arguments");
162 ss = c->default_sample_spec;
163 if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
164 pa_log("invalid sample format specification");
168 mkfifo(p = pa_modargs_get_value(ma, "file", DEFAULT_FIFO_NAME), 0777);
170 if ((fd = open(p, O_RDWR)) < 0) {
171 pa_log("open('%s'): %s", p, pa_cstrerror(errno));
175 pa_fd_set_cloexec(fd, 1);
177 if (fstat(fd, &st) < 0) {
178 pa_log("fstat('%s'): %s", p, pa_cstrerror(errno));
182 if (!S_ISFIFO(st.st_mode)) {
183 pa_log("'%s' is not a FIFO.", p);
187 u = pa_xmalloc0(sizeof(struct userdata));
188 u->filename = pa_xstrdup(p);
193 if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, &map))) {
194 pa_log("failed to create sink.");
197 u->sink->notify = notify_cb;
198 u->sink->get_latency = get_latency_cb;
199 u->sink->userdata = u;
200 pa_sink_set_owner(u->sink, m);
201 pa_sink_set_description(u->sink, t = pa_sprintf_malloc("Unix FIFO sink '%s'", p));
204 u->io = pa_iochannel_new(c->mainloop, -1, fd);
206 pa_iochannel_set_callback(u->io, io_callback, u);
208 u->memchunk.memblock = NULL;
209 u->memchunk.length = 0;
211 u->defer_event = c->mainloop->defer_new(c->mainloop, defer_callback, u);
212 assert(u->defer_event);
213 c->mainloop->defer_enable(u->defer_event, 0);
231 void pa__done(pa_core *c, pa_module*m) {
235 if (!(u = m->userdata))
238 if (u->memchunk.memblock)
239 pa_memblock_unref(u->memchunk.memblock);
241 pa_sink_disconnect(u->sink);
242 pa_sink_unref(u->sink);
243 pa_iochannel_free(u->io);
244 u->core->mainloop->defer_free(u->defer_event);
248 pa_xfree(u->filename);