code.delx.au - pulseaudio/blob - src/modules/module-remap-sink.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2008 Lennart Poettering
   7
   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.
  12
  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.
  17
  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
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <pulse/xmalloc.h>
  29
  30 #include <pulsecore/core-error.h>
  31 #include <pulsecore/namereg.h>
  32 #include <pulsecore/sink.h>
  33 #include <pulsecore/module.h>
  34 #include <pulsecore/core-util.h>
  35 #include <pulsecore/modargs.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/thread.h>
  38 #include <pulsecore/thread-mq.h>
  39 #include <pulsecore/rtpoll.h>
  40
  41 #include "module-remap-sink-symdef.h"
  42
  43 PA_MODULE_AUTHOR("Lennart Poettering");
  44 PA_MODULE_DESCRIPTION("Virtual channel remapping sink");
  45 PA_MODULE_VERSION(PACKAGE_VERSION);
  46 PA_MODULE_LOAD_ONCE(FALSE);
  47 PA_MODULE_USAGE(
  48         "sink_name=<name for the sink> "
  49         "master=<name of sink to remap> "
  50         "master_channel_map=<channel map> "
  51         "format=<sample format> "
  52         "channels=<number of channels> "
  53         "rate=<sample rate> "
  54         "channel_map=<channel map>");
  55
  56 struct userdata {
  57     pa_core *core;
  58     pa_module *module;
  59
  60     pa_sink *sink, *master;
  61     pa_sink_input *sink_input;
  62 };
  63
  64 static const char* const valid_modargs[] = {
  65     "sink_name",
  66     "master",
  67     "master_channel_map",
  68     "rate",
  69     "format",
  70     "channels",
  71     "channel_map",
  72     NULL
  73 };
  74
  75 /* Called from I/O thread context */
  76 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
  77     struct userdata *u = PA_SINK(o)->userdata;
  78
  79     switch (code) {
  80
  81         case PA_SINK_MESSAGE_GET_LATENCY: {
  82             pa_usec_t usec = 0;
  83
  84             /* Get the latency of the master sink */
  85             if (PA_MSGOBJECT(u->master)->process_msg(PA_MSGOBJECT(u->master), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
  86                 usec = 0;
  87
  88             /* Add the latency internal to our sink input on top */
  89             usec += pa_bytes_to_usec(pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq), &u->master->sample_spec);
  90
  91             *((pa_usec_t*) data) = usec;
  92             return 0;
  93         }
  94     }
  95
  96     return pa_sink_process_msg(o, code, data, offset, chunk);
  97 }
  98
  99 /* Called from main context */
 100 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
 101     struct userdata *u;
 102
 103     pa_sink_assert_ref(s);
 104     pa_assert_se(u = s->userdata);
 105
 106     if (PA_SINK_IS_LINKED(state) &&
 107         u->sink_input &&
 108         PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input)))
 109
 110         pa_sink_input_cork(u->sink_input, state == PA_SINK_SUSPENDED);
 111
 112     return 0;
 113 }
 114
 115 /* Called from I/O thread context */
 116 static void sink_request_rewind(pa_sink *s) {
 117     struct userdata *u;
 118
 119     pa_sink_assert_ref(s);
 120     pa_assert_se(u = s->userdata);
 121
 122     pa_sink_input_request_rewind(
 123             u->sink_input,
 124             s->thread_info.rewind_nbytes,
 125             FALSE, FALSE);
 126 }
 127
 128 /* Called from I/O thread context */
 129 static void sink_update_requested_latency(pa_sink *s) {
 130     struct userdata *u;
 131
 132     pa_sink_assert_ref(s);
 133     pa_assert_se(u = s->userdata);
 134
 135     /* Just hand this one over to the master sink */
 136     pa_sink_input_set_requested_latency_within_thread(
 137             u->sink_input,
 138             pa_sink_get_requested_latency_within_thread(s));
 139 }
 140
 141 /* Called from I/O thread context */
 142 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
 143     struct userdata *u;
 144
 145     pa_sink_input_assert_ref(i);
 146     pa_assert(chunk);
 147     pa_assert_se(u = i->userdata);
 148
 149     if (!u->sink)
 150         return -1;
 151
 152     pa_sink_render(u->sink, nbytes, chunk);
 153     return 0;
 154 }
 155
 156 /* Called from I/O thread context */
 157 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
 158     struct userdata *u;
 159
 160     pa_sink_input_assert_ref(i);
 161     pa_assert_se(u = i->userdata);
 162     pa_assert(nbytes > 0);
 163
 164     if (!u->sink)
 165         return;
 166
 167     if (u->sink->thread_info.rewind_nbytes > 0) {
 168         size_t amount;
 169
 170         amount = PA_MIN(u->sink->thread_info.rewind_nbytes, nbytes);
 171         u->sink->thread_info.rewind_nbytes = 0;
 172
 173         if (amount > 0)
 174             pa_sink_process_rewind(u->sink, amount);
 175     }
 176 }
 177
 178 /* Called from I/O thread context */
 179 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
 180     struct userdata *u;
 181
 182     pa_sink_input_assert_ref(i);
 183     pa_assert_se(u = i->userdata);
 184
 185     if (!u->sink)
 186         return;
 187
 188     pa_sink_set_max_rewind(u->sink, nbytes);
 189 }
 190
 191 /* Called from I/O thread context */
 192 static void sink_input_detach_cb(pa_sink_input *i) {
 193     struct userdata *u;
 194
 195     pa_sink_input_assert_ref(i);
 196     pa_assert_se(u = i->userdata);
 197
 198     if (!u->sink)
 199         return;
 200
 201     pa_sink_detach_within_thread(u->sink);
 202     pa_sink_set_asyncmsgq(u->sink, NULL);
 203     pa_sink_set_rtpoll(u->sink, NULL);
 204 }
 205
 206 /* Called from I/O thread context */
 207 static void sink_input_attach_cb(pa_sink_input *i) {
 208     struct userdata *u;
 209
 210     pa_sink_input_assert_ref(i);
 211     pa_assert_se(u = i->userdata);
 212
 213     if (!u->sink)
 214         return;
 215
 216     pa_sink_set_asyncmsgq(u->sink, i->sink->asyncmsgq);
 217     pa_sink_set_rtpoll(u->sink, i->sink->rtpoll);
 218     pa_sink_attach_within_thread(u->sink);
 219
 220     u->sink->max_latency = u->master->max_latency;
 221     u->sink->min_latency = u->master->min_latency;
 222 }
 223
 224 /* Called from main context */
 225 static void sink_input_kill_cb(pa_sink_input *i) {
 226     struct userdata *u;
 227
 228     pa_sink_input_assert_ref(i);
 229     pa_assert_se(u = i->userdata);
 230
 231     pa_sink_unlink(u->sink);
 232     pa_sink_unref(u->sink);
 233     u->sink = NULL;
 234
 235     pa_sink_input_unlink(u->sink_input);
 236     pa_sink_input_unref(u->sink_input);
 237     u->sink_input = NULL;
 238
 239     pa_module_unload_request(u->module);
 240 }
 241
 242 /* Called from IO thread context */
 243 static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
 244     struct userdata *u;
 245
 246     pa_sink_input_assert_ref(i);
 247     pa_assert_se(u = i->userdata);
 248
 249     /* If we are added for the first time, ask for a rewinding so that
 250      * we are heard right-away. */
 251     if (PA_SINK_INPUT_IS_LINKED(state) &&
 252         i->thread_info.state == PA_SINK_INPUT_INIT) {
 253         pa_log_debug("Requesting rewind due to state change.");
 254         pa_sink_input_request_rewind(i, 0, TRUE, TRUE);
 255     }
 256 }
 257
 258 int pa__init(pa_module*m) {
 259     struct userdata *u;
 260     pa_sample_spec ss;
 261     pa_channel_map sink_map, stream_map;
 262     pa_modargs *ma;
 263     const char *k;
 264     pa_sink *master;
 265     pa_sink_input_new_data sink_input_data;
 266     pa_sink_new_data sink_data;
 267
 268     pa_assert(m);
 269
 270     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 271         pa_log("Failed to parse module arguments.");
 272         goto fail;
 273     }
 274
 275     if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SINK, 1))) {
 276         pa_log("Master sink not found");
 277         goto fail;
 278     }
 279
 280     ss = master->sample_spec;
 281     sink_map = master->channel_map;
 282     if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &sink_map, PA_CHANNEL_MAP_DEFAULT) < 0) {
 283         pa_log("Invalid sample format specification or channel map");
 284         goto fail;
 285     }
 286
 287     stream_map = sink_map;
 288     if (pa_modargs_get_channel_map(ma, "master_channel_map", &stream_map) < 0) {
 289         pa_log("Invalid master hannel map");
 290         goto fail;
 291     }
 292
 293     if (stream_map.channels != ss.channels) {
 294         pa_log("Number of channels doesn't match");
 295         goto fail;
 296     }
 297
 298     if (pa_channel_map_equal(&stream_map, &master->channel_map))
 299         pa_log_warn("No remapping configured, proceeding nonetheless!");
 300
 301     u = pa_xnew0(struct userdata, 1);
 302     u->core = m->core;
 303     u->module = m;
 304     m->userdata = u;
 305     u->master = master;
 306     u->sink = NULL;
 307     u->sink_input = NULL;
 308
 309     /* Create sink */
 310     pa_sink_new_data_init(&sink_data);
 311     sink_data.driver = __FILE__;
 312     sink_data.module = m;
 313     if (!(sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
 314         sink_data.name = pa_sprintf_malloc("%s.remapped", master->name);
 315     pa_sink_new_data_set_sample_spec(&sink_data, &ss);
 316     pa_sink_new_data_set_channel_map(&sink_data, &sink_map);
 317     k = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
 318     pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : master->name);
 319     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
 320     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
 321
 322     u->sink = pa_sink_new(m->core, &sink_data, PA_SINK_LATENCY);
 323     pa_sink_new_data_done(&sink_data);
 324
 325     if (!u->sink) {
 326         pa_log("Failed to create sink.");
 327         goto fail;
 328     }
 329
 330     u->sink->parent.process_msg = sink_process_msg;
 331     u->sink->set_state = sink_set_state;
 332     u->sink->update_requested_latency = sink_update_requested_latency;
 333     u->sink->request_rewind = sink_request_rewind;
 334     u->sink->userdata = u;
 335
 336     pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq);
 337     pa_sink_set_rtpoll(u->sink, master->rtpoll);
 338
 339     /* Create sink input */
 340     pa_sink_input_new_data_init(&sink_input_data);
 341     sink_input_data.driver = __FILE__;
 342     sink_input_data.module = m;
 343     sink_input_data.sink = u->master;
 344     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Remapped Stream");
 345     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
 346     pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
 347     pa_sink_input_new_data_set_channel_map(&sink_input_data, &stream_map);
 348
 349     u->sink_input = pa_sink_input_new(m->core, &sink_input_data, PA_SINK_INPUT_DONT_MOVE);
 350     pa_sink_input_new_data_done(&sink_input_data);
 351
 352     if (!u->sink_input)
 353         goto fail;
 354
 355     u->sink_input->pop = sink_input_pop_cb;
 356     u->sink_input->process_rewind = sink_input_process_rewind_cb;
 357     u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
 358     u->sink_input->kill = sink_input_kill_cb;
 359     u->sink_input->attach = sink_input_attach_cb;
 360     u->sink_input->detach = sink_input_detach_cb;
 361     u->sink_input->state_change = sink_input_state_change_cb;
 362     u->sink_input->userdata = u;
 363
 364     pa_sink_put(u->sink);
 365     pa_sink_input_put(u->sink_input);
 366
 367     pa_modargs_free(ma);
 368
 369     return 0;
 370
 371 fail:
 372     if (ma)
 373         pa_modargs_free(ma);
 374
 375     pa__done(m);
 376
 377     return -1;
 378 }
 379
 380 void pa__done(pa_module*m) {
 381     struct userdata *u;
 382
 383     pa_assert(m);
 384
 385     if (!(u = m->userdata))
 386         return;
 387
 388     if (u->sink) {
 389         pa_sink_unlink(u->sink);
 390         pa_sink_unref(u->sink);
 391     }
 392
 393     if (u->sink_input) {
 394         pa_sink_input_unlink(u->sink_input);
 395         pa_sink_input_unref(u->sink_input);
 396     }
 397
 398     pa_xfree(u);
 399 }