code.delx.au - pulseaudio/blob - src/modules/module-ladspa-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 2.1 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 /* TODO: Some plugins cause latency, and some even report it by using a control
  23    out port. We don't currently use the latency information. */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <pulse/xmalloc.h>
  30 #include <pulse/i18n.h>
  31
  32 #include <pulsecore/core-error.h>
  33 #include <pulsecore/namereg.h>
  34 #include <pulsecore/sink.h>
  35 #include <pulsecore/module.h>
  36 #include <pulsecore/core-util.h>
  37 #include <pulsecore/modargs.h>
  38 #include <pulsecore/log.h>
  39 #include <pulsecore/thread.h>
  40 #include <pulsecore/thread-mq.h>
  41 #include <pulsecore/rtpoll.h>
  42 #include <pulsecore/sample-util.h>
  43 #include <pulsecore/ltdl-helper.h>
  44
  45 #include "module-ladspa-sink-symdef.h"
  46 #include "ladspa.h"
  47
  48 PA_MODULE_AUTHOR("Lennart Poettering");
  49 PA_MODULE_DESCRIPTION(_("Virtual LADSPA sink"));
  50 PA_MODULE_VERSION(PACKAGE_VERSION);
  51 PA_MODULE_LOAD_ONCE(FALSE);
  52 PA_MODULE_USAGE(
  53         _("sink_name=<name for the sink> "
  54           "sink_properties=<properties for the sink> "
  55           "master=<name of sink to filter> "
  56           "format=<sample format> "
  57           "rate=<sample rate> "
  58           "channels=<number of channels> "
  59           "channel_map=<channel map> "
  60           "plugin=<ladspa plugin name> "
  61           "label=<ladspa plugin label> "
  62           "control=<comma seperated list of input control values>"));
  63
  64 #define MEMBLOCKQ_MAXLENGTH (16*1024*1024)
  65
  66 struct userdata {
  67     pa_core *core;
  68     pa_module *module;
  69
  70     pa_sink *sink, *master;
  71     pa_sink_input *sink_input;
  72
  73     const LADSPA_Descriptor *descriptor;
  74     unsigned channels;
  75     LADSPA_Handle handle[PA_CHANNELS_MAX];
  76     LADSPA_Data *input, *output;
  77     size_t block_size;
  78     unsigned long input_port, output_port;
  79     LADSPA_Data *control;
  80
  81     /* This is a dummy buffer. Every port must be connected, but we don't care
  82        about control out ports. We connect them all to this single buffer. */
  83     LADSPA_Data control_out;
  84
  85     pa_memblockq *memblockq;
  86 };
  87
  88 static const char* const valid_modargs[] = {
  89     "sink_name",
  90     "sink_properties",
  91     "master",
  92     "format",
  93     "rate",
  94     "channels",
  95     "channel_map",
  96     "plugin",
  97     "label",
  98     "control",
  99     NULL
 100 };
 101
 102 /* Called from I/O thread context */
 103 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
 104     struct userdata *u = PA_SINK(o)->userdata;
 105
 106     switch (code) {
 107
 108         case PA_SINK_MESSAGE_GET_LATENCY: {
 109             pa_usec_t usec = 0;
 110
 111             /* Get the latency of the master sink */
 112             if (PA_MSGOBJECT(u->master)->process_msg(PA_MSGOBJECT(u->master), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
 113                 usec = 0;
 114
 115             /* Add the latency internal to our sink input on top */
 116             usec += pa_bytes_to_usec(pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq), &u->master->sample_spec);
 117
 118             *((pa_usec_t*) data) = usec;
 119             return 0;
 120         }
 121     }
 122
 123     return pa_sink_process_msg(o, code, data, offset, chunk);
 124 }
 125
 126 /* Called from main context */
 127 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
 128     struct userdata *u;
 129
 130     pa_sink_assert_ref(s);
 131     pa_assert_se(u = s->userdata);
 132
 133     if (PA_SINK_IS_LINKED(state) &&
 134         u->sink_input &&
 135         PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input)))
 136
 137         pa_sink_input_cork(u->sink_input, state == PA_SINK_SUSPENDED);
 138
 139     return 0;
 140 }
 141
 142 /* Called from I/O thread context */
 143 static void sink_request_rewind(pa_sink *s) {
 144     struct userdata *u;
 145
 146     pa_sink_assert_ref(s);
 147     pa_assert_se(u = s->userdata);
 148
 149     /* Just hand this one over to the master sink */
 150     pa_sink_input_request_rewind(u->sink_input, s->thread_info.rewind_nbytes + pa_memblockq_get_length(u->memblockq), TRUE, FALSE, FALSE);
 151 }
 152
 153 /* Called from I/O thread context */
 154 static void sink_update_requested_latency(pa_sink *s) {
 155     struct userdata *u;
 156
 157     pa_sink_assert_ref(s);
 158     pa_assert_se(u = s->userdata);
 159
 160     /* Just hand this one over to the master sink */
 161     pa_sink_input_set_requested_latency_within_thread(
 162             u->sink_input,
 163             pa_sink_get_requested_latency_within_thread(s));
 164 }
 165
 166 /* Called from I/O thread context */
 167 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
 168     struct userdata *u;
 169     float *src, *dst;
 170     size_t fs;
 171     unsigned n, c;
 172     pa_memchunk tchunk;
 173
 174     pa_sink_input_assert_ref(i);
 175     pa_assert(chunk);
 176     pa_assert_se(u = i->userdata);
 177
 178     if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
 179         return -1;
 180
 181     while (pa_memblockq_peek(u->memblockq, &tchunk) < 0) {
 182         pa_memchunk nchunk;
 183
 184         pa_sink_render(u->sink, nbytes, &nchunk);
 185         pa_memblockq_push(u->memblockq, &nchunk);
 186         pa_memblock_unref(nchunk.memblock);
 187     }
 188
 189     tchunk.length = PA_MIN(nbytes, tchunk.length);
 190     pa_assert(tchunk.length > 0);
 191
 192     fs = pa_frame_size(&i->sample_spec);
 193     n = (unsigned) (PA_MIN(tchunk.length, u->block_size) / fs);
 194
 195     pa_assert(n > 0);
 196
 197     chunk->index = 0;
 198     chunk->length = n*fs;
 199     chunk->memblock = pa_memblock_new(i->sink->core->mempool, chunk->length);
 200
 201     pa_memblockq_drop(u->memblockq, chunk->length);
 202
 203     src = (float*) ((uint8_t*) pa_memblock_acquire(tchunk.memblock) + tchunk.index);
 204     dst = (float*) pa_memblock_acquire(chunk->memblock);
 205
 206     for (c = 0; c < u->channels; c++) {
 207         pa_sample_clamp(PA_SAMPLE_FLOAT32NE, u->input, sizeof(float), src+c, u->channels*sizeof(float), n);
 208         u->descriptor->run(u->handle[c], n);
 209         pa_sample_clamp(PA_SAMPLE_FLOAT32NE, dst+c, u->channels*sizeof(float), u->output, sizeof(float), n);
 210     }
 211
 212     pa_memblock_release(tchunk.memblock);
 213     pa_memblock_release(chunk->memblock);
 214
 215     pa_memblock_unref(tchunk.memblock);
 216
 217     return 0;
 218 }
 219
 220 /* Called from I/O thread context */
 221 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
 222     struct userdata *u;
 223     size_t amount = 0;
 224
 225     pa_sink_input_assert_ref(i);
 226     pa_assert_se(u = i->userdata);
 227
 228     if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
 229         return;
 230
 231     if (u->sink->thread_info.rewind_nbytes > 0) {
 232         size_t max_rewrite;
 233
 234         max_rewrite = nbytes + pa_memblockq_get_length(u->memblockq);
 235         amount = PA_MIN(u->sink->thread_info.rewind_nbytes, max_rewrite);
 236         u->sink->thread_info.rewind_nbytes = 0;
 237
 238         if (amount > 0) {
 239             unsigned c;
 240
 241             pa_memblockq_seek(u->memblockq, - (int64_t) amount, PA_SEEK_RELATIVE, TRUE);
 242
 243             pa_log_debug("Resetting plugin");
 244
 245             /* Reset the plugin */
 246             if (u->descriptor->deactivate)
 247                 for (c = 0; c < u->channels; c++)
 248                     u->descriptor->deactivate(u->handle[c]);
 249             if (u->descriptor->activate)
 250                 for (c = 0; c < u->channels; c++)
 251                     u->descriptor->activate(u->handle[c]);
 252         }
 253     }
 254
 255     pa_sink_process_rewind(u->sink, amount);
 256     pa_memblockq_rewind(u->memblockq, nbytes);
 257 }
 258
 259 /* Called from I/O thread context */
 260 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
 261     struct userdata *u;
 262
 263     pa_sink_input_assert_ref(i);
 264     pa_assert_se(u = i->userdata);
 265
 266     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 267         return;
 268
 269     pa_memblockq_set_maxrewind(u->memblockq, nbytes);
 270     pa_sink_set_max_rewind_within_thread(u->sink, nbytes);
 271 }
 272
 273 /* Called from I/O thread context */
 274 static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
 275     struct userdata *u;
 276
 277     pa_sink_input_assert_ref(i);
 278     pa_assert_se(u = i->userdata);
 279
 280     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 281         return;
 282
 283     pa_sink_set_max_request_within_thread(u->sink, nbytes);
 284 }
 285
 286 /* Called from I/O thread context */
 287 static void sink_input_update_sink_latency_range_cb(pa_sink_input *i) {
 288     struct userdata *u;
 289
 290     pa_sink_input_assert_ref(i);
 291     pa_assert_se(u = i->userdata);
 292
 293     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 294         return;
 295
 296     pa_sink_set_latency_range_within_thread(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
 297 }
 298
 299 /* Called from I/O thread context */
 300 static void sink_input_detach_cb(pa_sink_input *i) {
 301     struct userdata *u;
 302
 303     pa_sink_input_assert_ref(i);
 304     pa_assert_se(u = i->userdata);
 305
 306     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 307         return;
 308
 309     pa_sink_detach_within_thread(u->sink);
 310     pa_sink_set_asyncmsgq(u->sink, NULL);
 311     pa_sink_set_rtpoll(u->sink, NULL);
 312 }
 313
 314 /* Called from I/O thread context */
 315 static void sink_input_attach_cb(pa_sink_input *i) {
 316     struct userdata *u;
 317
 318     pa_sink_input_assert_ref(i);
 319     pa_assert_se(u = i->userdata);
 320
 321     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 322         return;
 323
 324     pa_sink_set_asyncmsgq(u->sink, i->sink->asyncmsgq);
 325     pa_sink_set_rtpoll(u->sink, i->sink->rtpoll);
 326     pa_sink_attach_within_thread(u->sink);
 327
 328     pa_sink_set_latency_range_within_thread(u->sink, u->master->thread_info.min_latency, u->master->thread_info.max_latency);
 329 }
 330
 331 /* Called from main context */
 332 static void sink_input_kill_cb(pa_sink_input *i) {
 333     struct userdata *u;
 334
 335     pa_sink_input_assert_ref(i);
 336     pa_assert_se(u = i->userdata);
 337
 338     pa_sink_unlink(u->sink);
 339     pa_sink_input_unlink(u->sink_input);
 340
 341     pa_sink_unref(u->sink);
 342     u->sink = NULL;
 343     pa_sink_input_unref(u->sink_input);
 344     u->sink_input = NULL;
 345
 346     pa_module_unload_request(u->module, TRUE);
 347 }
 348
 349 /* Called from IO thread context */
 350 static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
 351     struct userdata *u;
 352
 353     pa_sink_input_assert_ref(i);
 354     pa_assert_se(u = i->userdata);
 355
 356     /* If we are added for the first time, ask for a rewinding so that
 357      * we are heard right-away. */
 358     if (PA_SINK_INPUT_IS_LINKED(state) &&
 359         i->thread_info.state == PA_SINK_INPUT_INIT) {
 360         pa_log_debug("Requesting rewind due to state change.");
 361         pa_sink_input_request_rewind(i, 0, FALSE, TRUE, TRUE);
 362     }
 363 }
 364
 365 /* Called from main context */
 366 static pa_bool_t sink_input_may_move_to_cb(pa_sink_input *i, pa_sink *dest) {
 367     struct userdata *u;
 368
 369     pa_sink_input_assert_ref(i);
 370     pa_assert_se(u = i->userdata);
 371
 372     return u->sink != dest;
 373 }
 374
 375 int pa__init(pa_module*m) {
 376     struct userdata *u;
 377     pa_sample_spec ss;
 378     pa_channel_map map;
 379     pa_modargs *ma;
 380     char *t;
 381     const char *z;
 382     pa_sink *master;
 383     pa_sink_input_new_data sink_input_data;
 384     pa_sink_new_data sink_data;
 385     const char *plugin, *label;
 386     LADSPA_Descriptor_Function descriptor_func;
 387     const char *e, *cdata;
 388     const LADSPA_Descriptor *d;
 389     unsigned long input_port, output_port, p, j, n_control;
 390     unsigned c;
 391     pa_bool_t *use_default = NULL;
 392
 393     pa_assert(m);
 394
 395     pa_assert(sizeof(LADSPA_Data) == sizeof(float));
 396
 397     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 398         pa_log("Failed to parse module arguments.");
 399         goto fail;
 400     }
 401
 402     if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SINK))) {
 403         pa_log("Master sink not found");
 404         goto fail;
 405     }
 406
 407     ss = master->sample_spec;
 408     ss.format = PA_SAMPLE_FLOAT32;
 409     map = master->channel_map;
 410     if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
 411         pa_log("Invalid sample format specification or channel map");
 412         goto fail;
 413     }
 414
 415     if (!(plugin = pa_modargs_get_value(ma, "plugin", NULL))) {
 416         pa_log("Missing LADSPA plugin name");
 417         goto fail;
 418     }
 419
 420     if (!(label = pa_modargs_get_value(ma, "label", NULL))) {
 421         pa_log("Missing LADSPA plugin label");
 422         goto fail;
 423     }
 424
 425     cdata = pa_modargs_get_value(ma, "control", NULL);
 426
 427     u = pa_xnew0(struct userdata, 1);
 428     u->core = m->core;
 429     u->module = m;
 430     m->userdata = u;
 431     u->master = master;
 432     u->sink = NULL;
 433     u->sink_input = NULL;
 434     u->memblockq = pa_memblockq_new(0, MEMBLOCKQ_MAXLENGTH, 0, pa_frame_size(&ss), 1, 1, 0, NULL);
 435
 436     if (!(e = getenv("LADSPA_PATH")))
 437         e = LADSPA_PATH;
 438
 439     /* FIXME: This is not exactly thread safe */
 440     t = pa_xstrdup(lt_dlgetsearchpath());
 441     lt_dlsetsearchpath(e);
 442     m->dl = lt_dlopenext(plugin);
 443     lt_dlsetsearchpath(t);
 444     pa_xfree(t);
 445
 446     if (!m->dl) {
 447         pa_log("Failed to load LADSPA plugin: %s", lt_dlerror());
 448         goto fail;
 449     }
 450
 451     if (!(descriptor_func = (LADSPA_Descriptor_Function) pa_load_sym(m->dl, NULL, "ladspa_descriptor"))) {
 452         pa_log("LADSPA module lacks ladspa_descriptor() symbol.");
 453         goto fail;
 454     }
 455
 456     for (j = 0;; j++) {
 457
 458         if (!(d = descriptor_func(j))) {
 459             pa_log("Failed to find plugin label '%s' in plugin '%s'.", label, plugin);
 460             goto fail;
 461         }
 462
 463         if (strcmp(d->Label, label) == 0)
 464             break;
 465     }
 466
 467     u->descriptor = d;
 468
 469     pa_log_debug("Module: %s", plugin);
 470     pa_log_debug("Label: %s", d->Label);
 471     pa_log_debug("Unique ID: %lu", d->UniqueID);
 472     pa_log_debug("Name: %s", d->Name);
 473     pa_log_debug("Maker: %s", d->Maker);
 474     pa_log_debug("Copyright: %s", d->Copyright);
 475
 476     input_port = output_port = (unsigned long) -1;
 477     n_control = 0;
 478
 479     for (p = 0; p < d->PortCount; p++) {
 480
 481         if (LADSPA_IS_PORT_INPUT(d->PortDescriptors[p]) && LADSPA_IS_PORT_AUDIO(d->PortDescriptors[p])) {
 482
 483             if (strcmp(d->PortNames[p], "Input") == 0) {
 484                 pa_assert(input_port == (unsigned long) -1);
 485                 input_port = p;
 486             } else {
 487                 pa_log("Found audio input port on plugin we cannot handle: %s", d->PortNames[p]);
 488                 goto fail;
 489             }
 490
 491         } else if (LADSPA_IS_PORT_OUTPUT(d->PortDescriptors[p]) && LADSPA_IS_PORT_AUDIO(d->PortDescriptors[p])) {
 492
 493             if (strcmp(d->PortNames[p], "Output") == 0) {
 494                 pa_assert(output_port == (unsigned long) -1);
 495                 output_port = p;
 496             } else {
 497                 pa_log("Found audio output port on plugin we cannot handle: %s", d->PortNames[p]);
 498                 goto fail;
 499             }
 500
 501         } else if (LADSPA_IS_PORT_INPUT(d->PortDescriptors[p]) && LADSPA_IS_PORT_CONTROL(d->PortDescriptors[p]))
 502             n_control++;
 503         else {
 504             pa_assert(LADSPA_IS_PORT_OUTPUT(d->PortDescriptors[p]) && LADSPA_IS_PORT_CONTROL(d->PortDescriptors[p]));
 505             pa_log_debug("Ignored control output port \"%s\".", d->PortNames[p]);
 506         }
 507     }
 508
 509     if ((input_port == (unsigned long) -1) || (output_port == (unsigned long) -1)) {
 510         pa_log("Failed to identify input and output ports. "
 511                "Right now this module can only deal with plugins which provide an 'Input' and an 'Output' audio port. "
 512                "Patches welcome!");
 513         goto fail;
 514     }
 515
 516     u->block_size = pa_frame_align(pa_mempool_block_size_max(m->core->mempool), &ss);
 517
 518     u->input = (LADSPA_Data*) pa_xnew(uint8_t, (unsigned) u->block_size);
 519     if (LADSPA_IS_INPLACE_BROKEN(d->Properties))
 520         u->output = (LADSPA_Data*) pa_xnew(uint8_t, (unsigned) u->block_size);
 521     else
 522         u->output = u->input;
 523
 524     u->channels = ss.channels;
 525
 526     for (c = 0; c < ss.channels; c++) {
 527         if (!(u->handle[c] = d->instantiate(d, ss.rate))) {
 528             pa_log("Failed to instantiate plugin %s with label %s for channel %i", plugin, d->Label, c);
 529             goto fail;
 530         }
 531
 532         d->connect_port(u->handle[c], input_port, u->input);
 533         d->connect_port(u->handle[c], output_port, u->output);
 534     }
 535
 536     if (!cdata && n_control > 0) {
 537         pa_log("This plugin requires specification of %lu control parameters.", n_control);
 538         goto fail;
 539     }
 540
 541     if (n_control > 0) {
 542         const char *state = NULL;
 543         char *k;
 544         unsigned long h;
 545
 546         u->control = pa_xnew(LADSPA_Data, (unsigned) n_control);
 547         use_default = pa_xnew(pa_bool_t, (unsigned) n_control);
 548         p = 0;
 549
 550         while ((k = pa_split(cdata, ",", &state)) && p < n_control) {
 551             double f;
 552
 553             if (*k == 0) {
 554                 use_default[p++] = TRUE;
 555                 pa_xfree(k);
 556                 continue;
 557             }
 558
 559             if (pa_atod(k, &f) < 0) {
 560                 pa_log("Failed to parse control value '%s'", k);
 561                 pa_xfree(k);
 562                 goto fail;
 563             }
 564
 565             pa_xfree(k);
 566
 567             use_default[p] = FALSE;
 568             u->control[p++] = (LADSPA_Data) f;
 569         }
 570
 571         /* The previous loop doesn't take the last control value into account
 572            if it is left empty, so we do it here. */
 573         if (*cdata == 0 || cdata[strlen(cdata) - 1] == ',') {
 574             if (p < n_control)
 575                 use_default[p] = TRUE;
 576             p++;
 577         }
 578
 579         if (p > n_control || k) {
 580             pa_log("Too many control values passed, %lu expected.", n_control);
 581             pa_xfree(k);
 582             goto fail;
 583         }
 584
 585         if (p < n_control) {
 586             pa_log("Not enough control values passed, %lu expected, %lu passed.", n_control, p);
 587             goto fail;
 588         }
 589
 590         h = 0;
 591         for (p = 0; p < d->PortCount; p++) {
 592             LADSPA_PortRangeHintDescriptor hint = d->PortRangeHints[p].HintDescriptor;
 593
 594             if (!LADSPA_IS_PORT_CONTROL(d->PortDescriptors[p]))
 595                 continue;
 596
 597             if (LADSPA_IS_PORT_OUTPUT(d->PortDescriptors[p])) {
 598                 for (c = 0; c < ss.channels; c++)
 599                     d->connect_port(u->handle[c], p, &u->control_out);
 600                 continue;
 601             }
 602
 603             pa_assert(h < n_control);
 604
 605             if (use_default[h]) {
 606                 LADSPA_Data lower, upper;
 607
 608                 if (!LADSPA_IS_HINT_HAS_DEFAULT(hint)) {
 609                     pa_log("Control port value left empty but plugin defines no default.");
 610                     goto fail;
 611                 }
 612
 613                 lower = d->PortRangeHints[p].LowerBound;
 614                 upper = d->PortRangeHints[p].UpperBound;
 615
 616                 if (LADSPA_IS_HINT_SAMPLE_RATE(hint)) {
 617                     lower *= (LADSPA_Data) ss.rate;
 618                     upper *= (LADSPA_Data) ss.rate;
 619                 }
 620
 621                 switch (hint & LADSPA_HINT_DEFAULT_MASK) {
 622
 623                     case LADSPA_HINT_DEFAULT_MINIMUM:
 624                         u->control[h] = lower;
 625                         break;
 626
 627                     case LADSPA_HINT_DEFAULT_MAXIMUM:
 628                         u->control[h] = upper;
 629                         break;
 630
 631                     case LADSPA_HINT_DEFAULT_LOW:
 632                         if (LADSPA_IS_HINT_LOGARITHMIC(hint))
 633                             u->control[h] = (LADSPA_Data) exp(log(lower) * 0.75 + log(upper) * 0.25);
 634                         else
 635                             u->control[h] = (LADSPA_Data) (lower * 0.75 + upper * 0.25);
 636                         break;
 637
 638                     case LADSPA_HINT_DEFAULT_MIDDLE:
 639                         if (LADSPA_IS_HINT_LOGARITHMIC(hint))
 640                             u->control[h] = (LADSPA_Data) exp(log(lower) * 0.5 + log(upper) * 0.5);
 641                         else
 642                             u->control[h] = (LADSPA_Data) (lower * 0.5 + upper * 0.5);
 643                         break;
 644
 645                     case LADSPA_HINT_DEFAULT_HIGH:
 646                         if (LADSPA_IS_HINT_LOGARITHMIC(hint))
 647                             u->control[h] = (LADSPA_Data) exp(log(lower) * 0.25 + log(upper) * 0.75);
 648                         else
 649                             u->control[h] = (LADSPA_Data) (lower * 0.25 + upper * 0.75);
 650                         break;
 651
 652                     case LADSPA_HINT_DEFAULT_0:
 653                         u->control[h] = 0;
 654                         break;
 655
 656                     case LADSPA_HINT_DEFAULT_1:
 657                         u->control[h] = 1;
 658                         break;
 659
 660                     case LADSPA_HINT_DEFAULT_100:
 661                         u->control[h] = 100;
 662                         break;
 663
 664                     case LADSPA_HINT_DEFAULT_440:
 665                         u->control[h] = 440;
 666                         break;
 667
 668                     default:
 669                         pa_assert_not_reached();
 670                 }
 671             }
 672
 673             if (LADSPA_IS_HINT_INTEGER(hint))
 674                 u->control[h] = roundf(u->control[h]);
 675
 676             pa_log_debug("Binding %f to port %s", u->control[h], d->PortNames[p]);
 677
 678             for (c = 0; c < ss.channels; c++)
 679                 d->connect_port(u->handle[c], p, &u->control[h]);
 680
 681             h++;
 682         }
 683
 684         pa_assert(h == n_control);
 685     }
 686
 687     if (d->activate)
 688         for (c = 0; c < u->channels; c++)
 689             d->activate(u->handle[c]);
 690
 691     /* Create sink */
 692     pa_sink_new_data_init(&sink_data);
 693     sink_data.driver = __FILE__;
 694     sink_data.module = m;
 695     if (!(sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
 696         sink_data.name = pa_sprintf_malloc("%s.ladspa", master->name);
 697     sink_data.namereg_fail = FALSE;
 698     pa_sink_new_data_set_sample_spec(&sink_data, &ss);
 699     pa_sink_new_data_set_channel_map(&sink_data, &map);
 700     z = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
 701     pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "LADSPA Plugin %s on %s", label, z ? z : master->name);
 702     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
 703     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
 704     pa_proplist_sets(sink_data.proplist, "device.ladspa.module", plugin);
 705     pa_proplist_sets(sink_data.proplist, "device.ladspa.label", d->Label);
 706     pa_proplist_sets(sink_data.proplist, "device.ladspa.name", d->Name);
 707     pa_proplist_sets(sink_data.proplist, "device.ladspa.maker", d->Maker);
 708     pa_proplist_sets(sink_data.proplist, "device.ladspa.copyright", d->Copyright);
 709     pa_proplist_setf(sink_data.proplist, "device.ladspa.unique_id", "%lu", (unsigned long) d->UniqueID);
 710
 711     if (pa_modargs_get_proplist(ma, "sink_properties", sink_data.proplist, PA_UPDATE_REPLACE) < 0) {
 712         pa_log("Invalid properties");
 713         pa_sink_new_data_done(&sink_data);
 714         goto fail;
 715     }
 716
 717     u->sink = pa_sink_new(m->core, &sink_data, PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY);
 718     pa_sink_new_data_done(&sink_data);
 719
 720     if (!u->sink) {
 721         pa_log("Failed to create sink.");
 722         goto fail;
 723     }
 724
 725     u->sink->parent.process_msg = sink_process_msg;
 726     u->sink->set_state = sink_set_state;
 727     u->sink->update_requested_latency = sink_update_requested_latency;
 728     u->sink->request_rewind = sink_request_rewind;
 729     u->sink->userdata = u;
 730
 731     pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq);
 732     pa_sink_set_rtpoll(u->sink, master->rtpoll);
 733
 734     /* Create sink input */
 735     pa_sink_input_new_data_init(&sink_input_data);
 736     sink_input_data.driver = __FILE__;
 737     sink_input_data.module = m;
 738     sink_input_data.sink = u->master;
 739     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "LADSPA Stream");
 740     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
 741     pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
 742     pa_sink_input_new_data_set_channel_map(&sink_input_data, &map);
 743
 744     pa_sink_input_new(&u->sink_input, m->core, &sink_input_data, PA_SINK_INPUT_DONT_MOVE);
 745     pa_sink_input_new_data_done(&sink_input_data);
 746
 747     if (!u->sink_input)
 748         goto fail;
 749
 750     u->sink_input->pop = sink_input_pop_cb;
 751     u->sink_input->process_rewind = sink_input_process_rewind_cb;
 752     u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
 753     u->sink_input->update_max_request = sink_input_update_max_request_cb;
 754     u->sink_input->update_sink_latency_range = sink_input_update_sink_latency_range_cb;
 755     u->sink_input->kill = sink_input_kill_cb;
 756     u->sink_input->attach = sink_input_attach_cb;
 757     u->sink_input->detach = sink_input_detach_cb;
 758     u->sink_input->state_change = sink_input_state_change_cb;
 759     u->sink_input->may_move_to = sink_input_may_move_to_cb;
 760     u->sink_input->userdata = u;
 761
 762     pa_sink_put(u->sink);
 763     pa_sink_input_put(u->sink_input);
 764
 765     pa_modargs_free(ma);
 766
 767     pa_xfree(use_default);
 768
 769     return 0;
 770
 771 fail:
 772     if (ma)
 773         pa_modargs_free(ma);
 774
 775     pa_xfree(use_default);
 776
 777     pa__done(m);
 778
 779     return -1;
 780 }
 781
 782 int pa__get_n_used(pa_module *m) {
 783     struct userdata *u;
 784
 785     pa_assert(m);
 786     pa_assert_se(u = m->userdata);
 787
 788     return pa_sink_linked_by(u->sink);
 789 }
 790
 791 void pa__done(pa_module*m) {
 792     struct userdata *u;
 793     unsigned c;
 794
 795     pa_assert(m);
 796
 797     if (!(u = m->userdata))
 798         return;
 799
 800     if (u->sink) {
 801         pa_sink_unlink(u->sink);
 802         pa_sink_unref(u->sink);
 803     }
 804
 805     if (u->sink_input) {
 806         pa_sink_input_unlink(u->sink_input);
 807         pa_sink_input_unref(u->sink_input);
 808     }
 809
 810     for (c = 0; c < u->channels; c++)
 811         if (u->handle[c]) {
 812             if (u->descriptor->deactivate)
 813                 u->descriptor->deactivate(u->handle[c]);
 814             u->descriptor->cleanup(u->handle[c]);
 815         }
 816
 817     if (u->output != u->input)
 818         pa_xfree(u->output);
 819
 820     if (u->memblockq)
 821         pa_memblockq_free(u->memblockq);
 822
 823     pa_xfree(u->input);
 824
 825     pa_xfree(u->control);
 826
 827     pa_xfree(u);
 828 }