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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2008 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <pulse/xmalloc.h>
  27
  28 #include <pulsecore/core-error.h>
  29 #include <pulsecore/namereg.h>
  30 #include <pulsecore/sink.h>
  31 #include <pulsecore/module.h>
  32 #include <pulsecore/core-util.h>
  33 #include <pulsecore/modargs.h>
  34 #include <pulsecore/log.h>
  35 #include <pulsecore/thread.h>
  36 #include <pulsecore/thread-mq.h>
  37 #include <pulsecore/rtpoll.h>
  38
  39 #include "module-remap-sink-symdef.h"
  40
  41 PA_MODULE_AUTHOR("Lennart Poettering");
  42 PA_MODULE_DESCRIPTION("Virtual channel remapping sink");
  43 PA_MODULE_VERSION(PACKAGE_VERSION);
  44 PA_MODULE_LOAD_ONCE(FALSE);
  45 PA_MODULE_USAGE(
  46         "sink_name=<name for the sink> "
  47         "master=<name of sink to remap> "
  48         "master_channel_map=<channel map> "
  49         "format=<sample format> "
  50         "channels=<number of channels> "
  51         "rate=<sample rate> "
  52         "channel_map=<channel map> "
  53         "remix=<remix channels?>");
  54
  55 struct userdata {
  56     pa_core *core;
  57     pa_module *module;
  58
  59     pa_sink *sink, *master;
  60     pa_sink_input *sink_input;
  61 };
  62
  63 static const char* const valid_modargs[] = {
  64     "sink_name",
  65     "master",
  66     "master_channel_map",
  67     "rate",
  68     "format",
  69     "channels",
  70     "channel_map",
  71     "remix",
  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(u->sink_input, s->thread_info.rewind_nbytes, TRUE, FALSE);
 123 }
 124
 125 /* Called from I/O thread context */
 126 static void sink_update_requested_latency(pa_sink *s) {
 127     struct userdata *u;
 128
 129     pa_sink_assert_ref(s);
 130     pa_assert_se(u = s->userdata);
 131
 132     /* Just hand this one over to the master sink */
 133     pa_sink_input_set_requested_latency_within_thread(
 134             u->sink_input,
 135             pa_sink_get_requested_latency_within_thread(s));
 136 }
 137
 138 /* Called from I/O thread context */
 139 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
 140     struct userdata *u;
 141
 142     pa_sink_input_assert_ref(i);
 143     pa_assert(chunk);
 144     pa_assert_se(u = i->userdata);
 145
 146     if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
 147         return -1;
 148
 149     pa_sink_render(u->sink, nbytes, chunk);
 150     return 0;
 151 }
 152
 153 /* Called from I/O thread context */
 154 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
 155     struct userdata *u;
 156
 157     pa_sink_input_assert_ref(i);
 158     pa_assert_se(u = i->userdata);
 159     pa_assert(nbytes > 0);
 160
 161     if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
 162         return;
 163
 164     if (u->sink->thread_info.rewind_nbytes > 0) {
 165         size_t amount;
 166
 167         amount = PA_MIN(u->sink->thread_info.rewind_nbytes, nbytes);
 168         u->sink->thread_info.rewind_nbytes = 0;
 169
 170         if (amount > 0)
 171             pa_sink_process_rewind(u->sink, amount);
 172     }
 173 }
 174
 175 /* Called from I/O thread context */
 176 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
 177     struct userdata *u;
 178
 179     pa_sink_input_assert_ref(i);
 180     pa_assert_se(u = i->userdata);
 181
 182     if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
 183         return;
 184
 185     pa_sink_set_max_rewind(u->sink, nbytes);
 186 }
 187
 188 /* Called from I/O thread context */
 189 static void sink_input_detach_cb(pa_sink_input *i) {
 190     struct userdata *u;
 191
 192     pa_sink_input_assert_ref(i);
 193     pa_assert_se(u = i->userdata);
 194
 195     if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
 196         return;
 197
 198     pa_sink_detach_within_thread(u->sink);
 199     pa_sink_set_asyncmsgq(u->sink, NULL);
 200     pa_sink_set_rtpoll(u->sink, NULL);
 201 }
 202
 203 /* Called from I/O thread context */
 204 static void sink_input_attach_cb(pa_sink_input *i) {
 205     struct userdata *u;
 206
 207     pa_sink_input_assert_ref(i);
 208     pa_assert_se(u = i->userdata);
 209
 210     if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
 211         return;
 212
 213     pa_sink_set_asyncmsgq(u->sink, i->sink->asyncmsgq);
 214     pa_sink_set_rtpoll(u->sink, i->sink->rtpoll);
 215     pa_sink_attach_within_thread(u->sink);
 216
 217     pa_sink_set_latency_range(u->sink, u->master->min_latency, u->master->max_latency);
 218 }
 219
 220 /* Called from main context */
 221 static void sink_input_kill_cb(pa_sink_input *i) {
 222     struct userdata *u;
 223
 224     pa_sink_input_assert_ref(i);
 225     pa_assert_se(u = i->userdata);
 226
 227     pa_sink_unlink(u->sink);
 228     pa_sink_input_unlink(u->sink_input);
 229
 230     pa_sink_unref(u->sink);
 231     u->sink = NULL;
 232     pa_sink_input_unref(u->sink_input);
 233     u->sink_input = NULL;
 234
 235     pa_module_unload_request(u->module);
 236 }
 237
 238 /* Called from IO thread context */
 239 static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
 240     struct userdata *u;
 241
 242     pa_sink_input_assert_ref(i);
 243     pa_assert_se(u = i->userdata);
 244
 245     /* If we are added for the first time, ask for a rewinding so that
 246      * we are heard right-away. */
 247     if (PA_SINK_INPUT_IS_LINKED(state) &&
 248         i->thread_info.state == PA_SINK_INPUT_INIT) {
 249         pa_log_debug("Requesting rewind due to state change.");
 250         pa_sink_input_request_rewind(i, 0, FALSE, TRUE);
 251     }
 252 }
 253
 254 int pa__init(pa_module*m) {
 255     struct userdata *u;
 256     pa_sample_spec ss;
 257     pa_channel_map sink_map, stream_map;
 258     pa_modargs *ma;
 259     const char *k;
 260     pa_sink *master;
 261     pa_sink_input_new_data sink_input_data;
 262     pa_sink_new_data sink_data;
 263     pa_bool_t remix = TRUE;
 264
 265     pa_assert(m);
 266
 267     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 268         pa_log("Failed to parse module arguments.");
 269         goto fail;
 270     }
 271
 272     if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SINK, 1))) {
 273         pa_log("Master sink not found");
 274         goto fail;
 275     }
 276
 277     ss = master->sample_spec;
 278     sink_map = master->channel_map;
 279     if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &sink_map, PA_CHANNEL_MAP_DEFAULT) < 0) {
 280         pa_log("Invalid sample format specification or channel map");
 281         goto fail;
 282     }
 283
 284     stream_map = sink_map;
 285     if (pa_modargs_get_channel_map(ma, "master_channel_map", &stream_map) < 0) {
 286         pa_log("Invalid master channel map");
 287         goto fail;
 288     }
 289
 290     if (stream_map.channels != ss.channels) {
 291         pa_log("Number of channels doesn't match");
 292         goto fail;
 293     }
 294
 295     if (pa_channel_map_equal(&stream_map, &master->channel_map))
 296         pa_log_warn("No remapping configured, proceeding nonetheless!");
 297
 298     if (pa_modargs_get_value_boolean(ma, "remix", &remix) < 0) {
 299         pa_log("Invalid boolean remix parameter");
 300         goto fail;
 301     }
 302
 303     u = pa_xnew0(struct userdata, 1);
 304     u->core = m->core;
 305     u->module = m;
 306     m->userdata = u;
 307     u->master = master;
 308     u->sink = NULL;
 309     u->sink_input = NULL;
 310
 311     /* Create sink */
 312     pa_sink_new_data_init(&sink_data);
 313     sink_data.driver = __FILE__;
 314     sink_data.module = m;
 315     if (!(sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
 316         sink_data.name = pa_sprintf_malloc("%s.remapped", master->name);
 317     pa_sink_new_data_set_sample_spec(&sink_data, &ss);
 318     pa_sink_new_data_set_channel_map(&sink_data, &sink_map);
 319     k = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
 320     pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : master->name);
 321     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
 322     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
 323
 324     u->sink = pa_sink_new(m->core, &sink_data, PA_SINK_LATENCY);
 325     pa_sink_new_data_done(&sink_data);
 326
 327     if (!u->sink) {
 328         pa_log("Failed to create sink.");
 329         goto fail;
 330     }
 331
 332     u->sink->parent.process_msg = sink_process_msg;
 333     u->sink->set_state = sink_set_state;
 334     u->sink->update_requested_latency = sink_update_requested_latency;
 335     u->sink->request_rewind = sink_request_rewind;
 336     u->sink->userdata = u;
 337
 338     pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq);
 339     pa_sink_set_rtpoll(u->sink, master->rtpoll);
 340
 341     /* Create sink input */
 342     pa_sink_input_new_data_init(&sink_input_data);
 343     sink_input_data.driver = __FILE__;
 344     sink_input_data.module = m;
 345     sink_input_data.sink = u->master;
 346     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Remapped Stream");
 347     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
 348     pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
 349     pa_sink_input_new_data_set_channel_map(&sink_input_data, &stream_map);
 350
 351     u->sink_input = pa_sink_input_new(m->core, &sink_input_data, PA_SINK_INPUT_DONT_MOVE | (remix ? 0 : PA_SINK_INPUT_NO_REMIX));
 352     pa_sink_input_new_data_done(&sink_input_data);
 353
 354     if (!u->sink_input)
 355         goto fail;
 356
 357     u->sink_input->pop = sink_input_pop_cb;
 358     u->sink_input->process_rewind = sink_input_process_rewind_cb;
 359     u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
 360     u->sink_input->kill = sink_input_kill_cb;
 361     u->sink_input->attach = sink_input_attach_cb;
 362     u->sink_input->detach = sink_input_detach_cb;
 363     u->sink_input->state_change = sink_input_state_change_cb;
 364     u->sink_input->userdata = u;
 365
 366     pa_sink_put(u->sink);
 367     pa_sink_input_put(u->sink_input);
 368
 369     pa_modargs_free(ma);
 370
 371     return 0;
 372
 373 fail:
 374     if (ma)
 375         pa_modargs_free(ma);
 376
 377     pa__done(m);
 378
 379     return -1;
 380 }
 381
 382 void pa__done(pa_module*m) {
 383     struct userdata *u;
 384
 385     pa_assert(m);
 386
 387     if (!(u = m->userdata))
 388         return;
 389
 390     if (u->sink) {
 391         pa_sink_unlink(u->sink);
 392         pa_sink_unref(u->sink);
 393     }
 394
 395     if (u->sink_input) {
 396         pa_sink_input_unlink(u->sink_input);
 397         pa_sink_input_unref(u->sink_input);
 398     }
 399
 400     pa_xfree(u);
 401 }