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