code.delx.au - pulseaudio/blob - src/pulsecore/source-output.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 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 <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #include <pulse/utf8.h>
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/core-subscribe.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/namereg.h>
  38
  39 #include "source-output.h"
  40
  41 static PA_DEFINE_CHECK_TYPE(pa_source_output, pa_msgobject);
  42
  43 static void source_output_free(pa_object* mo);
  44
  45 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data) {
  46     pa_assert(data);
  47
  48     memset(data, 0, sizeof(*data));
  49     data->resample_method = PA_RESAMPLER_INVALID;
  50     return data;
  51 }
  52
  53 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map) {
  54     pa_assert(data);
  55
  56     if ((data->channel_map_is_set = !!map))
  57         data->channel_map = *map;
  58 }
  59
  60 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec) {
  61     pa_assert(data);
  62
  63     if ((data->sample_spec_is_set = !!spec))
  64         data->sample_spec = *spec;
  65 }
  66
  67 pa_source_output* pa_source_output_new(
  68         pa_core *core,
  69         pa_source_output_new_data *data,
  70         pa_source_output_flags_t flags) {
  71
  72     pa_source_output *o;
  73     pa_resampler *resampler = NULL;
  74     char st[PA_SAMPLE_SPEC_SNPRINT_MAX];
  75
  76     pa_assert(core);
  77     pa_assert(data);
  78
  79     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], data) < 0)
  80         return NULL;
  81
  82     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
  83     pa_return_null_if_fail(!data->name || pa_utf8_valid(data->name));
  84
  85     if (!data->source)
  86         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
  87
  88     pa_return_null_if_fail(data->source);
  89     pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
  90
  91     if (!data->sample_spec_is_set)
  92         data->sample_spec = data->source->sample_spec;
  93
  94     pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
  95
  96     if (!data->channel_map_is_set) {
  97         if (data->source->channel_map.channels == data->sample_spec.channels)
  98             data->channel_map = data->source->channel_map;
  99         else
 100             pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 101     }
 102
 103     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 104     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 105
 106     if (data->resample_method == PA_RESAMPLER_INVALID)
 107         data->resample_method = core->resample_method;
 108
 109     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 110
 111     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 112         pa_log("Failed to create source output: too many outputs per source.");
 113         return NULL;
 114     }
 115
 116     if ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 117         !pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 118         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map)) {
 119
 120         if (!(resampler = pa_resampler_new(
 121                       core->mempool,
 122                       &data->source->sample_spec, &data->source->channel_map,
 123                       &data->sample_spec, &data->channel_map,
 124                       data->resample_method,
 125                       !!(flags & PA_SOURCE_OUTPUT_VARIABLE_RATE)))) {
 126             pa_log_warn("Unsupported resampling operation.");
 127             return NULL;
 128         }
 129
 130         data->resample_method = pa_resampler_get_method(resampler);
 131     }
 132
 133     o = pa_msgobject_new(pa_source_output);
 134     o->parent.parent.free = source_output_free;
 135     o->parent.process_msg = pa_source_output_process_msg;
 136
 137     o->core = core;
 138     o->state = PA_SOURCE_OUTPUT_INIT;
 139     o->flags = flags;
 140     o->name = pa_xstrdup(data->name);
 141     o->driver = pa_xstrdup(data->driver);
 142     o->module = data->module;
 143     o->source = data->source;
 144     o->client = data->client;
 145
 146     o->resample_method = data->resample_method;
 147     o->sample_spec = data->sample_spec;
 148     o->channel_map = data->channel_map;
 149
 150     o->push = NULL;
 151     o->kill = NULL;
 152     o->get_latency = NULL;
 153     o->detach = NULL;
 154     o->attach = NULL;
 155     o->suspend = NULL;
 156     o->userdata = NULL;
 157
 158     o->thread_info.state = o->state;
 159     o->thread_info.attached = FALSE;
 160     o->thread_info.sample_spec = o->sample_spec;
 161     o->thread_info.resampler = resampler;
 162
 163     pa_assert_se(pa_idxset_put(core->source_outputs, o, &o->index) == 0);
 164     pa_assert_se(pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL) == 0);
 165
 166     pa_log_info("Created output %u \"%s\" on %s with sample spec %s",
 167                 o->index,
 168                 o->name,
 169                 o->source->name,
 170                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec));
 171
 172     /* Don't forget to call pa_source_output_put! */
 173
 174     return o;
 175 }
 176
 177 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
 178     pa_assert(o);
 179
 180     if (o->state == state)
 181         return 0;
 182
 183     if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 184         return -1;
 185
 186     if (o->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
 187         pa_assert_se(o->source->n_corked -- >= 1);
 188     else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
 189         o->source->n_corked++;
 190
 191     o->state = state;
 192
 193     return 0;
 194 }
 195
 196 void pa_source_output_unlink(pa_source_output*o) {
 197     pa_bool_t linked;
 198     pa_assert(o);
 199
 200     /* See pa_sink_unlink() for a couple of comments how this function
 201      * works */
 202
 203     pa_source_output_ref(o);
 204
 205     linked = PA_SOURCE_OUTPUT_LINKED(o->state);
 206
 207     if (linked)
 208         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 209
 210     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 211     if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
 212         pa_source_output_unref(o);
 213
 214     if (linked) {
 215         pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
 216         source_output_set_state(o, PA_SOURCE_OUTPUT_UNLINKED);
 217         pa_source_update_status(o->source);
 218     } else
 219         o->state = PA_SOURCE_OUTPUT_UNLINKED;
 220
 221     o->push = NULL;
 222     o->kill = NULL;
 223     o->get_latency = NULL;
 224     o->attach = NULL;
 225     o->detach = NULL;
 226     o->suspend = NULL;
 227
 228     if (linked) {
 229         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 230         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 231     }
 232
 233     o->source = NULL;
 234     pa_source_output_unref(o);
 235 }
 236
 237 static void source_output_free(pa_object* mo) {
 238     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 239
 240     pa_assert(pa_source_output_refcnt(o) == 0);
 241
 242     if (PA_SOURCE_OUTPUT_LINKED(o->state))
 243         pa_source_output_unlink(o);
 244
 245     pa_log_info("Freeing output %u \"%s\"", o->index, o->name);
 246
 247     pa_assert(!o->thread_info.attached);
 248
 249     if (o->thread_info.resampler)
 250         pa_resampler_free(o->thread_info.resampler);
 251
 252     pa_xfree(o->name);
 253     pa_xfree(o->driver);
 254     pa_xfree(o);
 255 }
 256
 257 void pa_source_output_put(pa_source_output *o) {
 258     pa_source_output_assert_ref(o);
 259
 260     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 261     pa_assert(o->push);
 262
 263     o->thread_info.state = o->state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 264
 265     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
 266     pa_source_update_status(o->source);
 267
 268     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 269
 270     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 271 }
 272
 273 void pa_source_output_kill(pa_source_output*o) {
 274     pa_source_output_assert_ref(o);
 275     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 276
 277     if (o->kill)
 278         o->kill(o);
 279 }
 280
 281 pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
 282     pa_usec_t r = 0;
 283
 284     pa_source_output_assert_ref(o);
 285     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 286
 287     if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, &r, 0, NULL) < 0)
 288         r = 0;
 289
 290     if (o->get_latency)
 291         r += o->get_latency(o);
 292
 293     return r;
 294 }
 295
 296 /* Called from thread context */
 297 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 298     pa_memchunk rchunk;
 299
 300     pa_source_output_assert_ref(o);
 301     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->thread_info.state));
 302     pa_assert(chunk);
 303     pa_assert(chunk->length);
 304
 305     if (!o->push || o->state == PA_SOURCE_OUTPUT_CORKED)
 306         return;
 307
 308     pa_assert(o->state == PA_SOURCE_OUTPUT_RUNNING);
 309
 310     if (!o->thread_info.resampler) {
 311         o->push(o, chunk);
 312         return;
 313     }
 314
 315     pa_resampler_run(o->thread_info.resampler, chunk, &rchunk);
 316     if (!rchunk.length)
 317         return;
 318
 319     pa_assert(rchunk.memblock);
 320     o->push(o, &rchunk);
 321     pa_memblock_unref(rchunk.memblock);
 322 }
 323
 324 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
 325     pa_source_output_assert_ref(o);
 326     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 327
 328     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 329 }
 330
 331 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
 332     pa_source_output_assert_ref(o);
 333     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 334     pa_return_val_if_fail(o->thread_info.resampler, -1);
 335
 336     if (o->sample_spec.rate == rate)
 337         return 0;
 338
 339     o->sample_spec.rate = rate;
 340
 341     pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 342
 343     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 344     return 0;
 345 }
 346
 347 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 348     pa_source_output_assert_ref(o);
 349
 350     if (!o->name && !name)
 351         return;
 352
 353     if (o->name && name && !strcmp(o->name, name))
 354         return;
 355
 356     pa_xfree(o->name);
 357     o->name = pa_xstrdup(name);
 358
 359     if (PA_SOURCE_OUTPUT_LINKED(o->state)) {
 360         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NAME_CHANGED], o);
 361         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 362     }
 363 }
 364
 365 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 366     pa_source_output_assert_ref(o);
 367
 368     return o->resample_method;
 369 }
 370
 371 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 372     pa_source *origin;
 373     pa_resampler *new_resampler = NULL;
 374
 375     pa_source_output_assert_ref(o);
 376     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 377     pa_source_assert_ref(dest);
 378
 379     origin = o->source;
 380
 381     if (dest == origin)
 382         return 0;
 383
 384     if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
 385         return -1;
 386
 387     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 388         pa_log_warn("Failed to move source output: too many outputs per source.");
 389         return -1;
 390     }
 391
 392     if (o->thread_info.resampler &&
 393         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 394         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 395
 396         /* Try to reuse the old resampler if possible */
 397         new_resampler = o->thread_info.resampler;
 398
 399     else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 400              !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 401              !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 402
 403         /* Okey, we need a new resampler for the new source */
 404
 405         if (!(new_resampler = pa_resampler_new(
 406                       dest->core->mempool,
 407                       &dest->sample_spec, &dest->channel_map,
 408                       &o->sample_spec, &o->channel_map,
 409                       o->resample_method,
 410                       !!(o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE)))) {
 411             pa_log_warn("Unsupported resampling operation.");
 412             return -1;
 413         }
 414     }
 415
 416     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], o);
 417
 418     /* Okey, let's move it */
 419     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
 420
 421     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 422     pa_idxset_put(dest->outputs, o, NULL);
 423     o->source = dest;
 424
 425     /* Replace resampler */
 426     if (new_resampler != o->thread_info.resampler) {
 427         if (o->thread_info.resampler)
 428             pa_resampler_free(o->thread_info.resampler);
 429         o->thread_info.resampler = new_resampler;
 430     }
 431
 432     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
 433
 434     pa_source_update_status(origin);
 435     pa_source_update_status(dest);
 436
 437     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
 438
 439     pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
 440
 441     /* Notify everyone */
 442     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 443
 444     return 0;
 445 }
 446
 447 /* Called from thread context */
 448 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
 449     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 450
 451     pa_source_output_assert_ref(o);
 452     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->thread_info.state));
 453
 454     switch (code) {
 455
 456         case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE: {
 457
 458             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 459             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 460
 461             return 0;
 462         }
 463
 464         case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE: {
 465             o->thread_info.state = PA_PTR_TO_UINT(userdata);
 466
 467             return 0;
 468         }
 469     }
 470
 471     return -1;
 472 }