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) {
149 pa_module_set_used(u->module, pa_sink_used_by(u->sink));
151 if (!u->memchunk.length)
152 if (pa_sink_render(u->sink, 8192, &u->memchunk) < 0)
155 assert(u->memchunk.memblock);
156 assert(u->memchunk.length);
158 p = pa_memblock_acquire(u->memchunk.memblock);
160 if ((r = pa_iochannel_write(u->io, (uint8_t*) p + u->memchunk.index, u->memchunk.length)) < 0) {
161 pa_memblock_release(u->memchunk.memblock);
162 pa_log("write() failed: %s", pa_cstrerror(errno));
165 pa_memblock_release(u->memchunk.memblock);
167 u->memchunk.index += r;
168 u->memchunk.length -= r;
170 if (u->memchunk.length <= 0) {
171 pa_memblock_unref(u->memchunk.memblock);
172 u->memchunk.memblock = NULL;
179 static int handle_response(struct userdata *u) {
184 assert(u->read_length == sizeof(int32_t));
186 /* Process auth data */
187 if (!*(int32_t*) u->read_data) {
188 pa_log("Authentication failed: %s", pa_cstrerror(errno));
192 /* Request latency data */
193 assert(!u->write_data);
194 *(int32_t*) (u->write_data = pa_xmalloc(u->write_length = sizeof(int32_t))) = ESD_PROTO_LATENCY;
197 u->state = STATE_LATENCY;
199 /* Space for next response */
200 assert(u->read_length >= sizeof(int32_t));
202 u->read_length = sizeof(int32_t);
206 case STATE_LATENCY: {
208 assert(u->read_length == sizeof(int32_t));
210 /* Process latency info */
211 u->latency = (pa_usec_t) ((double) (*(int32_t*) u->read_data) * 1000000 / 44100);
212 if (u->latency > 10000000) {
213 pa_log("WARNING! Invalid latency information received from server");
218 assert(!u->write_data);
219 p = u->write_data = pa_xmalloc0(u->write_length = sizeof(int32_t)*3+ESD_NAME_MAX);
220 *(p++) = ESD_PROTO_STREAM_PLAY;
223 pa_strlcpy((char*) p, "PulseAudio Tunnel", ESD_NAME_MAX);
226 u->state = STATE_RUNNING;
228 /* Don't read any further */
229 pa_xfree(u->read_data);
231 u->read_index = u->read_length = 0;
243 static int do_read(struct userdata *u) {
246 if (!pa_iochannel_is_readable(u->io))
249 if (u->state == STATE_AUTH || u->state == STATE_LATENCY) {
255 assert(u->read_index < u->read_length);
257 if ((r = pa_iochannel_read(u->io, (uint8_t*) u->read_data + u->read_index, u->read_length - u->read_index)) <= 0) {
258 pa_log("read() failed: %s", r < 0 ? pa_cstrerror(errno) : "EOF");
264 assert(u->read_index <= u->read_length);
266 if (u->read_index == u->read_length)
267 return handle_response(u);
273 static void do_work(struct userdata *u) {
276 u->core->mainloop->defer_enable(u->defer_event, 0);
278 if (do_read(u) < 0 || do_write(u) < 0)
282 static void notify_cb(pa_sink*s) {
283 struct userdata *u = s->userdata;
286 if (pa_iochannel_is_writable(u->io))
287 u->core->mainloop->defer_enable(u->defer_event, 1);
290 static pa_usec_t get_latency_cb(pa_sink *s) {
291 struct userdata *u = s->userdata;
296 (u->memchunk.memblock ? pa_bytes_to_usec(u->memchunk.length, &s->sample_spec) : 0);
299 static void defer_callback(PA_GCC_UNUSED pa_mainloop_api *m, PA_GCC_UNUSED pa_defer_event*e, void *userdata) {
300 struct userdata *u = userdata;
305 static void io_callback(PA_GCC_UNUSED pa_iochannel *io, void*userdata) {
306 struct userdata *u = userdata;
311 static void on_connection(PA_GCC_UNUSED pa_socket_client *c, pa_iochannel*io, void *userdata) {
312 struct userdata *u = userdata;
314 pa_socket_client_unref(u->client);
318 pa_log("connection failed: %s", pa_cstrerror(errno));
324 pa_iochannel_set_callback(u->io, io_callback, u);
327 int pa__init(pa_core *c, pa_module*m) {
328 struct userdata *u = NULL;
331 pa_modargs *ma = NULL;
336 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
337 pa_log("failed to parse module arguments");
341 ss = c->default_sample_spec;
342 if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
343 pa_log("invalid sample format specification");
347 if ((ss.format != PA_SAMPLE_U8 && ss.format != PA_SAMPLE_S16NE) ||
349 pa_log("esound sample type support is limited to mono/stereo and U8 or S16NE sample data");
353 u = pa_xmalloc0(sizeof(struct userdata));
358 (ss.format == PA_SAMPLE_U8 ? ESD_BITS8 : ESD_BITS16) |
359 (ss.channels == 2 ? ESD_STEREO : ESD_MONO);
364 u->read_data = u->write_data = NULL;
365 u->read_index = u->write_index = u->read_length = u->write_length = 0;
366 u->state = STATE_AUTH;
369 if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, NULL))) {
370 pa_log("failed to create sink.");
374 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))) {
375 pa_log("failed to connect to server.");
378 pa_socket_client_set_callback(u->client, on_connection, u);
380 /* Prepare the initial request */
381 u->write_data = pa_xmalloc(u->write_length = ESD_KEY_LEN + sizeof(int32_t));
382 if (pa_authkey_load_auto(pa_modargs_get_value(ma, "cookie", ".esd_auth"), u->write_data, ESD_KEY_LEN) < 0) {
383 pa_log("failed to load cookie");
386 *(int32_t*) ((uint8_t*) u->write_data + ESD_KEY_LEN) = ESD_ENDIAN_KEY;
388 /* Reserve space for the response */
389 u->read_data = pa_xmalloc(u->read_length = sizeof(int32_t));
391 u->sink->notify = notify_cb;
392 u->sink->get_latency = get_latency_cb;
393 u->sink->userdata = u;
394 pa_sink_set_owner(u->sink, m);
395 pa_sink_set_description(u->sink, t = pa_sprintf_malloc("Esound sink '%s'", p));
398 u->memchunk.memblock = NULL;
399 u->memchunk.length = 0;
401 u->defer_event = c->mainloop->defer_new(c->mainloop, defer_callback, u);
402 c->mainloop->defer_enable(u->defer_event, 0);
418 void pa__done(pa_core *c, pa_module*m) {
422 if (!(u = m->userdata))
428 if (u->memchunk.memblock)
429 pa_memblock_unref(u->memchunk.memblock);
432 pa_socket_client_unref(u->client);
434 pa_xfree(u->read_data);
435 pa_xfree(u->write_data);