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>
47 #include <pulsecore/socket-client.h>
48 #include <pulsecore/esound.h>
49 #include <pulsecore/authkey.h>
51 #include "module-esound-sink-symdef.h"
53 PA_MODULE_AUTHOR("Lennart Poettering")
54 PA_MODULE_DESCRIPTION("ESOUND Sink")
55 PA_MODULE_VERSION(PACKAGE_VERSION)
56 PA_MODULE_USAGE("sink_name=<name for the sink> server=<address> cookie=<filename> format=<sample format> channels=<number of channels> rate=<sample rate>")
58 #define DEFAULT_SINK_NAME "esound_output"
65 pa_socket_client *client;
67 pa_defer_event *defer_event;
73 size_t write_length, write_index;
76 size_t read_length, read_index;
78 enum { STATE_AUTH, STATE_LATENCY, STATE_RUNNING, STATE_DEAD } state;
86 static const char* const valid_modargs[] = {
96 static void cancel(struct userdata *u) {
99 u->state = STATE_DEAD;
102 pa_iochannel_free(u->io);
106 if (u->defer_event) {
107 u->core->mainloop->defer_free(u->defer_event);
108 u->defer_event = NULL;
112 pa_sink_disconnect(u->sink);
113 pa_sink_unref(u->sink);
118 pa_module_unload_request(u->module);
123 static int do_write(struct userdata *u) {
127 if (!pa_iochannel_is_writable(u->io))
131 assert(u->write_index < u->write_length);
133 if ((r = pa_iochannel_write(u->io, (uint8_t*) u->write_data + u->write_index, u->write_length - u->write_index)) <= 0) {
134 pa_log("write() failed: %s", pa_cstrerror(errno));
139 assert(u->write_index <= u->write_length);
141 if (u->write_index == u->write_length) {
143 u->write_data = NULL;
144 u->write_index = u->write_length = 0;
146 } else if (u->state == STATE_RUNNING) {
147 pa_module_set_used(u->module, pa_sink_used_by(u->sink));
149 if (!u->memchunk.length)
150 if (pa_sink_render(u->sink, 8192, &u->memchunk) < 0)
153 assert(u->memchunk.memblock && u->memchunk.length);
155 if ((r = pa_iochannel_write(u->io, (uint8_t*) u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length)) < 0) {
156 pa_log("write() failed: %s", pa_cstrerror(errno));
160 u->memchunk.index += r;
161 u->memchunk.length -= r;
163 if (u->memchunk.length <= 0) {
164 pa_memblock_unref(u->memchunk.memblock);
165 u->memchunk.memblock = NULL;
172 static int handle_response(struct userdata *u) {
177 assert(u->read_length == sizeof(int32_t));
179 /* Process auth data */
180 if (!*(int32_t*) u->read_data) {
181 pa_log("Authentication failed: %s", pa_cstrerror(errno));
185 /* Request latency data */
186 assert(!u->write_data);
187 *(int32_t*) (u->write_data = pa_xmalloc(u->write_length = sizeof(int32_t))) = ESD_PROTO_LATENCY;
190 u->state = STATE_LATENCY;
192 /* Space for next response */
193 assert(u->read_length >= sizeof(int32_t));
195 u->read_length = sizeof(int32_t);
199 case STATE_LATENCY: {
201 assert(u->read_length == sizeof(int32_t));
203 /* Process latency info */
204 u->latency = (pa_usec_t) ((double) (*(int32_t*) u->read_data) * 1000000 / 44100);
205 if (u->latency > 10000000) {
206 pa_log("WARNING! Invalid latency information received from server");
211 assert(!u->write_data);
212 p = u->write_data = pa_xmalloc0(u->write_length = sizeof(int32_t)*3+ESD_NAME_MAX);
213 *(p++) = ESD_PROTO_STREAM_PLAY;
216 pa_strlcpy((char*) p, "PulseAudio Tunnel", ESD_NAME_MAX);
219 u->state = STATE_RUNNING;
221 /* Don't read any further */
222 pa_xfree(u->read_data);
224 u->read_index = u->read_length = 0;
236 static int do_read(struct userdata *u) {
239 if (!pa_iochannel_is_readable(u->io))
242 if (u->state == STATE_AUTH || u->state == STATE_LATENCY) {
248 assert(u->read_index < u->read_length);
250 if ((r = pa_iochannel_read(u->io, (uint8_t*) u->read_data + u->read_index, u->read_length - u->read_index)) <= 0) {
251 pa_log("read() failed: %s", r < 0 ? pa_cstrerror(errno) : "EOF");
257 assert(u->read_index <= u->read_length);
259 if (u->read_index == u->read_length)
260 return handle_response(u);
266 static void do_work(struct userdata *u) {
269 u->core->mainloop->defer_enable(u->defer_event, 0);
271 if (do_read(u) < 0 || do_write(u) < 0)
275 static void notify_cb(pa_sink*s) {
276 struct userdata *u = s->userdata;
279 if (pa_iochannel_is_writable(u->io))
280 u->core->mainloop->defer_enable(u->defer_event, 1);
283 static pa_usec_t get_latency_cb(pa_sink *s) {
284 struct userdata *u = s->userdata;
289 (u->memchunk.memblock ? pa_bytes_to_usec(u->memchunk.length, &s->sample_spec) : 0);
292 static void defer_callback(PA_GCC_UNUSED pa_mainloop_api *m, PA_GCC_UNUSED pa_defer_event*e, void *userdata) {
293 struct userdata *u = userdata;
298 static void io_callback(PA_GCC_UNUSED pa_iochannel *io, void*userdata) {
299 struct userdata *u = userdata;
304 static void on_connection(PA_GCC_UNUSED pa_socket_client *c, pa_iochannel*io, void *userdata) {
305 struct userdata *u = userdata;
307 pa_socket_client_unref(u->client);
311 pa_log("connection failed: %s", pa_cstrerror(errno));
317 pa_iochannel_set_callback(u->io, io_callback, u);
320 int pa__init(pa_core *c, pa_module*m) {
321 struct userdata *u = NULL;
324 pa_modargs *ma = NULL;
329 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
330 pa_log("failed to parse module arguments");
334 ss = c->default_sample_spec;
335 if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
336 pa_log("invalid sample format specification");
340 if ((ss.format != PA_SAMPLE_U8 && ss.format != PA_SAMPLE_S16NE) ||
342 pa_log("esound sample type support is limited to mono/stereo and U8 or S16NE sample data");
346 u = pa_xmalloc0(sizeof(struct userdata));
351 (ss.format == PA_SAMPLE_U8 ? ESD_BITS8 : ESD_BITS16) |
352 (ss.channels == 2 ? ESD_STEREO : ESD_MONO);
357 u->read_data = u->write_data = NULL;
358 u->read_index = u->write_index = u->read_length = u->write_length = 0;
359 u->state = STATE_AUTH;
362 if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, NULL))) {
363 pa_log("failed to create sink.");
367 if (!(u->client = pa_socket_client_new_string(u->core->mainloop, p = pa_modargs_get_value(ma, "server", ESD_UNIX_SOCKET_NAME), ESD_DEFAULT_PORT))) {
368 pa_log("failed to connect to server.");
371 pa_socket_client_set_callback(u->client, on_connection, u);
373 /* Prepare the initial request */
374 u->write_data = pa_xmalloc(u->write_length = ESD_KEY_LEN + sizeof(int32_t));
375 if (pa_authkey_load_auto(pa_modargs_get_value(ma, "cookie", ".esd_auth"), u->write_data, ESD_KEY_LEN) < 0) {
376 pa_log("failed to load cookie");
379 *(int32_t*) ((uint8_t*) u->write_data + ESD_KEY_LEN) = ESD_ENDIAN_KEY;
381 /* Reserve space for the response */
382 u->read_data = pa_xmalloc(u->read_length = sizeof(int32_t));
384 u->sink->notify = notify_cb;
385 u->sink->get_latency = get_latency_cb;
386 u->sink->userdata = u;
387 pa_sink_set_owner(u->sink, m);
388 pa_sink_set_description(u->sink, t = pa_sprintf_malloc("Esound sink '%s'", p));
391 u->memchunk.memblock = NULL;
392 u->memchunk.length = 0;
394 u->defer_event = c->mainloop->defer_new(c->mainloop, defer_callback, u);
395 c->mainloop->defer_enable(u->defer_event, 0);
411 void pa__done(pa_core *c, pa_module*m) {
415 if (!(u = m->userdata))
421 if (u->memchunk.memblock)
422 pa_memblock_unref(u->memchunk.memblock);
425 pa_socket_client_unref(u->client);
427 pa_xfree(u->read_data);
428 pa_xfree(u->write_data);