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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio 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   polypaudio 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 polypaudio; 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 <assert.h>
  27 #include <stdio.h>
  28
  29 #include <polyp/xmalloc.h>
  30
  31 #include <polypcore/module.h>
  32 #include <polypcore/llist.h>
  33 #include <polypcore/sink.h>
  34 #include <polypcore/sink-input.h>
  35 #include <polypcore/memblockq.h>
  36 #include <polypcore/log.h>
  37 #include <polypcore/util.h>
  38 #include <polypcore/modargs.h>
  39 #include <polypcore/namereg.h>
  40
  41 #include "module-combine-symdef.h"
  42
  43 PA_MODULE_AUTHOR("Lennart Poettering")
  44 PA_MODULE_DESCRIPTION("Combine multiple sinks to one")
  45 PA_MODULE_VERSION(PACKAGE_VERSION)
  46 PA_MODULE_USAGE(
  47         "sink_name=<name for the sink> "
  48         "master=<master sink> "
  49         "slaves=<slave sinks> "
  50         "adjust_time=<seconds> "
  51         "resample_method=<method> "
  52         "format=<sample format> "
  53         "channels=<number of channels> "
  54         "rate=<sample rate> "
  55         "channel_map=<channel map> ")
  56
  57 #define DEFAULT_SINK_NAME "combined"
  58 #define MEMBLOCKQ_MAXLENGTH (1024*170)
  59 #define RENDER_SIZE (1024*10)
  60
  61 #define DEFAULT_ADJUST_TIME 20
  62
  63 static const char* const valid_modargs[] = {
  64     "sink_name",
  65     "master",
  66     "slaves",
  67     "adjust_time",
  68     "resample_method",
  69     "format",
  70     "channels",
  71     "rate",
  72     "channel_map",
  73     NULL
  74 };
  75
  76 struct output {
  77     struct userdata *userdata;
  78     pa_sink_input *sink_input;
  79     size_t counter;
  80     pa_memblockq *memblockq;
  81     pa_usec_t total_latency;
  82     PA_LLIST_FIELDS(struct output);
  83 };
  84
  85 struct userdata {
  86     pa_module *module;
  87     pa_core *core;
  88     pa_sink *sink;
  89     unsigned n_outputs;
  90     struct output *master;
  91     pa_time_event *time_event;
  92     uint32_t adjust_time;
  93
  94     PA_LLIST_HEAD(struct output, outputs);
  95 };
  96
  97 static void output_free(struct output *o);
  98 static void clear_up(struct userdata *u);
  99
 100 static void update_usage(struct userdata *u) {
 101     pa_module_set_used(u->module,
 102                        (u->sink ? pa_idxset_size(u->sink->inputs) : 0) +
 103                        (u->sink ? pa_idxset_size(u->sink->monitor_source->outputs) : 0));
 104 }
 105
 106
 107 static void adjust_rates(struct userdata *u) {
 108     struct output *o;
 109     pa_usec_t max_sink_latency = 0, min_total_latency = (pa_usec_t) -1, target_latency;
 110     uint32_t base_rate;
 111     assert(u && u->sink);
 112
 113     for (o = u->outputs; o; o = o->next) {
 114         uint32_t sink_latency = o->sink_input->sink ? pa_sink_get_latency(o->sink_input->sink) : 0;
 115
 116         o->total_latency = sink_latency + pa_sink_input_get_latency(o->sink_input);
 117
 118         if (sink_latency > max_sink_latency)
 119             max_sink_latency = sink_latency;
 120
 121         if (o->total_latency < min_total_latency)
 122             min_total_latency = o->total_latency;
 123     }
 124
 125     assert(min_total_latency != (pa_usec_t) -1);
 126
 127     target_latency = max_sink_latency > min_total_latency ? max_sink_latency : min_total_latency;
 128
 129     pa_log_info(__FILE__": [%s] target latency is %0.0f usec.", u->sink->name, (float) target_latency);
 130
 131     base_rate = u->sink->sample_spec.rate;
 132
 133     for (o = u->outputs; o; o = o->next) {
 134         uint32_t r = base_rate;
 135
 136         if (o->total_latency < target_latency)
 137             r -= (uint32_t) (((((double) target_latency - o->total_latency))/u->adjust_time)*r/ 1000000);
 138         else if (o->total_latency > target_latency)
 139             r += (uint32_t) (((((double) o->total_latency - target_latency))/u->adjust_time)*r/ 1000000);
 140
 141         if (r < (uint32_t) (base_rate*0.9) || r > (uint32_t) (base_rate*1.1))
 142             pa_log_warn(__FILE__": [%s] sample rates too different, not adjusting (%u vs. %u).", o->sink_input->name, base_rate, r);
 143         else {
 144             pa_log_info(__FILE__": [%s] new rate is %u Hz; ratio is %0.3f; latency is %0.0f usec.", o->sink_input->name, r, (double) r / base_rate, (float) o->total_latency);
 145             pa_sink_input_set_rate(o->sink_input, r);
 146         }
 147     }
 148 }
 149
 150 static void request_memblock(struct userdata *u) {
 151     pa_memchunk chunk;
 152     struct output *o;
 153     assert(u && u->sink);
 154
 155     update_usage(u);
 156
 157     if (pa_sink_render(u->sink, RENDER_SIZE, &chunk) < 0)
 158         return;
 159
 160     for (o = u->outputs; o; o = o->next)
 161         pa_memblockq_push_align(o->memblockq, &chunk);
 162
 163     pa_memblock_unref(chunk.memblock);
 164 }
 165
 166 static void time_callback(pa_mainloop_api*a, pa_time_event* e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
 167     struct userdata *u = userdata;
 168     struct timeval n;
 169     assert(u && a && u->time_event == e);
 170
 171     adjust_rates(u);
 172
 173     pa_gettimeofday(&n);
 174     n.tv_sec += u->adjust_time;
 175     u->sink->core->mainloop->time_restart(e, &n);
 176 }
 177
 178 static int sink_input_peek_cb(pa_sink_input *i, pa_memchunk *chunk) {
 179     struct output *o = i->userdata;
 180     assert(i && o && o->sink_input && chunk);
 181
 182     if (pa_memblockq_peek(o->memblockq, chunk) >= 0)
 183         return 0;
 184
 185     /* Try harder */
 186     request_memblock(o->userdata);
 187
 188     return pa_memblockq_peek(o->memblockq, chunk);
 189 }
 190
 191 static void sink_input_drop_cb(pa_sink_input *i, const pa_memchunk *chunk, size_t length) {
 192     struct output *o = i->userdata;
 193     assert(i && o && o->sink_input && chunk && length);
 194
 195     pa_memblockq_drop(o->memblockq, chunk, length);
 196     o->counter += length;
 197 }
 198
 199 static void sink_input_kill_cb(pa_sink_input *i) {
 200     struct output *o = i->userdata;
 201     assert(i && o && o->sink_input);
 202     pa_module_unload_request(o->userdata->module);
 203     clear_up(o->userdata);
 204 }
 205
 206 static pa_usec_t sink_input_get_latency_cb(pa_sink_input *i) {
 207     struct output *o = i->userdata;
 208     assert(i && o && o->sink_input);
 209
 210     return pa_bytes_to_usec(pa_memblockq_get_length(o->memblockq), &i->sample_spec);
 211 }
 212
 213 static pa_usec_t sink_get_latency_cb(pa_sink *s) {
 214     struct userdata *u = s->userdata;
 215     assert(s && u && u->sink && u->master);
 216
 217     return
 218         pa_sink_input_get_latency(u->master->sink_input) +
 219         pa_sink_get_latency(u->master->sink_input->sink);
 220 }
 221
 222 static struct output *output_new(struct userdata *u, pa_sink *sink, int resample_method) {
 223     struct output *o = NULL;
 224     char t[256];
 225     assert(u && sink && u->sink);
 226
 227     o = pa_xmalloc(sizeof(struct output));
 228     o->userdata = u;
 229
 230     o->counter = 0;
 231     o->memblockq = pa_memblockq_new(
 232             0,
 233             MEMBLOCKQ_MAXLENGTH,
 234             MEMBLOCKQ_MAXLENGTH,
 235             pa_frame_size(&u->sink->sample_spec),
 236             1,
 237             0,
 238             NULL,
 239             sink->core->memblock_stat);
 240
 241     snprintf(t, sizeof(t), "%s: output #%u", u->sink->name, u->n_outputs+1);
 242     if (!(o->sink_input = pa_sink_input_new(sink, __FILE__, t, &u->sink->sample_spec, &u->sink->channel_map, NULL, 1, resample_method)))
 243         goto fail;
 244
 245     o->sink_input->get_latency = sink_input_get_latency_cb;
 246     o->sink_input->peek = sink_input_peek_cb;
 247     o->sink_input->drop = sink_input_drop_cb;
 248     o->sink_input->kill = sink_input_kill_cb;
 249     o->sink_input->userdata = o;
 250     o->sink_input->owner = u->module;
 251
 252     PA_LLIST_PREPEND(struct output, u->outputs, o);
 253     u->n_outputs++;
 254     return o;
 255
 256 fail:
 257
 258     if (o) {
 259         if (o->sink_input) {
 260             pa_sink_input_disconnect(o->sink_input);
 261             pa_sink_input_unref(o->sink_input);
 262         }
 263
 264         if (o->memblockq)
 265             pa_memblockq_free(o->memblockq);
 266
 267         pa_xfree(o);
 268     }
 269
 270     return NULL;
 271 }
 272
 273 static void output_free(struct output *o) {
 274     assert(o);
 275     PA_LLIST_REMOVE(struct output, o->userdata->outputs, o);
 276     o->userdata->n_outputs--;
 277     pa_memblockq_free(o->memblockq);
 278     pa_sink_input_disconnect(o->sink_input);
 279     pa_sink_input_unref(o->sink_input);
 280     pa_xfree(o);
 281 }
 282
 283 static void clear_up(struct userdata *u) {
 284     struct output *o;
 285     assert(u);
 286
 287     if (u->time_event) {
 288         u->core->mainloop->time_free(u->time_event);
 289         u->time_event = NULL;
 290     }
 291
 292     while ((o = u->outputs))
 293         output_free(o);
 294
 295     u->master = NULL;
 296
 297     if (u->sink) {
 298         pa_sink_disconnect(u->sink);
 299         pa_sink_unref(u->sink);
 300         u->sink = NULL;
 301     }
 302 }
 303
 304 int pa__init(pa_core *c, pa_module*m) {
 305     struct userdata *u;
 306     pa_modargs *ma = NULL;
 307     const char *master_name, *slaves, *rm;
 308     pa_sink *master_sink;
 309     char *n = NULL;
 310     const char*split_state;
 311     struct timeval tv;
 312     int resample_method = -1;
 313     pa_sample_spec ss;
 314     pa_channel_map map;
 315
 316     assert(c && m);
 317
 318     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 319         pa_log(__FILE__": failed to parse module arguments");
 320         goto fail;
 321     }
 322
 323     if ((rm = pa_modargs_get_value(ma, "resample_method", NULL))) {
 324         if ((resample_method = pa_parse_resample_method(rm)) < 0) {
 325             pa_log(__FILE__": invalid resample method '%s'", rm);
 326             goto fail;
 327         }
 328     }
 329
 330     u = pa_xnew(struct userdata, 1);
 331     m->userdata = u;
 332     u->sink = NULL;
 333     u->n_outputs = 0;
 334     u->master = NULL;
 335     u->module = m;
 336     u->core = c;
 337     u->time_event = NULL;
 338     u->adjust_time = DEFAULT_ADJUST_TIME;
 339     PA_LLIST_HEAD_INIT(struct output, u->outputs);
 340
 341     if (pa_modargs_get_value_u32(ma, "adjust_time", &u->adjust_time) < 0) {
 342         pa_log(__FILE__": failed to parse adjust_time value");
 343         goto fail;
 344     }
 345
 346     if (!(master_name = pa_modargs_get_value(ma, "master", NULL)) || !(slaves = pa_modargs_get_value(ma, "slaves", NULL))) {
 347         pa_log(__FILE__": no master or slave sinks specified");
 348         goto fail;
 349     }
 350
 351     if (!(master_sink = pa_namereg_get(c, master_name, PA_NAMEREG_SINK, 1))) {
 352         pa_log(__FILE__": invalid master sink '%s'", master_name);
 353         goto fail;
 354     }
 355
 356     ss = master_sink->sample_spec;
 357     if ((pa_modargs_get_sample_spec(ma, &ss) < 0)) {
 358         pa_log(__FILE__": invalid sample specification.");
 359         goto fail;
 360     }
 361
 362     if (ss.channels == master_sink->sample_spec.channels)
 363         map = master_sink->channel_map;
 364     else
 365         pa_channel_map_init_auto(&map, ss.channels, PA_CHANNEL_MAP_DEFAULT);
 366
 367     if ((pa_modargs_get_channel_map(ma, &map) < 0)) {
 368         pa_log(__FILE__": invalid channel map.");
 369         goto fail;
 370     }
 371
 372     if (ss.channels != map.channels) {
 373         pa_log(__FILE__": channel map and sample specification don't match.");
 374         goto fail;
 375     }
 376
 377     if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, &map))) {
 378         pa_log(__FILE__": failed to create sink");
 379         goto fail;
 380     }
 381
 382     pa_sink_set_owner(u->sink, m);
 383     u->sink->description = pa_sprintf_malloc("Combined sink");
 384     u->sink->get_latency = sink_get_latency_cb;
 385     u->sink->userdata = u;
 386
 387     if (!(u->master = output_new(u, master_sink, resample_method))) {
 388         pa_log(__FILE__": failed to create master sink input on sink '%s'.", u->sink->name);
 389         goto fail;
 390     }
 391
 392     split_state = NULL;
 393     while ((n = pa_split(slaves, ",", &split_state))) {
 394         pa_sink *slave_sink;
 395
 396         if (!(slave_sink = pa_namereg_get(c, n, PA_NAMEREG_SINK, 1))) {
 397             pa_log(__FILE__": invalid slave sink '%s'", n);
 398             goto fail;
 399         }
 400
 401         pa_xfree(n);
 402
 403         if (!output_new(u, slave_sink, resample_method)) {
 404             pa_log(__FILE__": failed to create slave sink input on sink '%s'.", slave_sink->name);
 405             goto fail;
 406         }
 407     }
 408
 409     if (u->n_outputs <= 1)
 410         pa_log_warn(__FILE__": WARNING: no slave sinks specified.");
 411
 412     if (u->adjust_time > 0) {
 413         pa_gettimeofday(&tv);
 414         tv.tv_sec += u->adjust_time;
 415         u->time_event = c->mainloop->time_new(c->mainloop, &tv, time_callback, u);
 416     }
 417
 418     pa_modargs_free(ma);
 419     return 0;
 420
 421 fail:
 422     pa_xfree(n);
 423
 424     if (ma)
 425         pa_modargs_free(ma);
 426
 427     pa__done(c, m);
 428     return -1;
 429 }
 430
 431 void pa__done(pa_core *c, pa_module*m) {
 432     struct userdata *u;
 433     assert(c && m);
 434
 435     if (!(u = m->userdata))
 436         return;
 437
 438     clear_up(u);
 439     pa_xfree(u);
 440 }
 441
 442