code.delx.au - pulseaudio/blob - src/modules/module-remap-sink.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 <pulse/xmalloc.h>
  29
  30 #include <pulsecore/core-error.h>
  31 #include <pulsecore/namereg.h>
  32 #include <pulsecore/sink.h>
  33 #include <pulsecore/module.h>
  34 #include <pulsecore/core-util.h>
  35 #include <pulsecore/modargs.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/thread.h>
  38 #include <pulsecore/thread-mq.h>
  39 #include <pulsecore/rtpoll.h>
  40
  41 #include "module-remap-sink-symdef.h"
  42
  43 PA_MODULE_AUTHOR("Lennart Poettering");
  44 PA_MODULE_DESCRIPTION("Virtual channel remapping sink");
  45 PA_MODULE_VERSION(PACKAGE_VERSION);
  46 PA_MODULE_LOAD_ONCE(FALSE);
  47 PA_MODULE_USAGE(
  48         "sink_name=<name for the sink> "
  49         "master=<name of sink to remap> "
  50         "master_channel_map=<channel map> "
  51         "format=<sample format> "
  52         "channels=<number of channels> "
  53         "rate=<sample rate> "
  54         "channel_map=<channel map>");
  55
  56 struct userdata {
  57     pa_core *core;
  58     pa_module *module;
  59
  60     pa_sink *sink, *master;
  61     pa_sink_input *sink_input;
  62 };
  63
  64 static const char* const valid_modargs[] = {
  65     "sink_name",
  66     "master",
  67     "master_channel_map",
  68     "rate",
  69     "format",
  70     "channels",
  71     "channel_map",
  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             if (PA_MSGOBJECT(u->master)->process_msg(PA_MSGOBJECT(u->master), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
  85                 usec = 0;
  86
  87             *((pa_usec_t*) data) = usec/* + pa_bytes_to_usec(u->memchunk.length, &u->sink->sample_spec)*/;
  88             return 0;
  89         }
  90     }
  91
  92     return pa_sink_process_msg(o, code, data, offset, chunk);
  93 }
  94
  95 /* Called from main context */
  96 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
  97     struct userdata *u;
  98
  99     pa_sink_assert_ref(s);
 100     pa_assert_se(u = s->userdata);
 101
 102     if (PA_SINK_LINKED(state) && u->sink_input && PA_SINK_INPUT_LINKED(pa_sink_input_get_state(u->sink_input)))
 103         pa_sink_input_cork(u->sink_input, state == PA_SINK_SUSPENDED);
 104
 105     return 0;
 106 }
 107
 108 /* Called from I/O thread context */
 109 static void sink_request_rewind(pa_sink *s) {
 110     struct userdata *u;
 111
 112     pa_sink_assert_ref(s);
 113     pa_assert_se(u = s->userdata);
 114
 115     pa_sink_input_request_rewrite(u->sink_input, s->thread_info.rewind_nbytes);
 116 }
 117
 118 /* Called from I/O thread context */
 119 static void sink_update_requested_latency(pa_sink *s) {
 120     struct userdata *u;
 121
 122     pa_sink_assert_ref(s);
 123     pa_assert_se(u = s->userdata);
 124
 125     /* Just hand this one over to the master sink */
 126     u->sink_input->thread_info.requested_sink_latency = pa_sink_get_requested_latency_within_thread(s);
 127     pa_sink_invalidate_requested_latency(u->master);
 128 }
 129
 130 /* Called from I/O thread context */
 131 static int sink_input_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
 132     struct userdata *u = PA_SINK_INPUT(o)->userdata;
 133
 134     switch (code) {
 135         case PA_SINK_INPUT_MESSAGE_GET_LATENCY:
 136             *((pa_usec_t*) data) = 0; /*pa_bytes_to_usec(u->memchunk.length, &u->sink_input->sample_spec);*/
 137
 138             /* Fall through, the default handler will add in the extra
 139              * latency added by the resampler */
 140             break;
 141     }
 142
 143     return pa_sink_input_process_msg(o, code, data, offset, chunk);
 144 }
 145
 146 static void sink_input_rewind_cb(pa_sink_input *i, size_t nbytes);
 147
 148 /* Called from I/O thread context */
 149 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
 150     struct userdata *u;
 151
 152     pa_sink_input_assert_ref(i);
 153     pa_assert(chunk);
 154     pa_assert_se(u = i->userdata);
 155
 156     pa_sink_render(u->sink, nbytes, chunk);
 157
 158     return 0;
 159 }
 160
 161 /* Called from I/O thread context */
 162 static void sink_input_rewind_cb(pa_sink_input *i, size_t nbytes) {
 163     struct userdata *u;
 164
 165     pa_sink_input_assert_ref(i);
 166     pa_assert_se(u = i->userdata);
 167     pa_assert(nbytes > 0);
 168
 169     u->sink->thread_info.rewind_nbytes = nbytes;
 170     pa_sink_process_rewind(u->sink);
 171 }
 172
 173 /* Called from I/O thread context */
 174 static void sink_input_set_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
 175     struct userdata *u;
 176
 177     pa_sink_input_assert_ref(i);
 178     pa_assert_se(u = i->userdata);
 179
 180     pa_sink_set_max_rewind(u->sink, nbytes);
 181 }
 182
 183 /* Called from I/O thread context */
 184 static void sink_input_detach_cb(pa_sink_input *i) {
 185     struct userdata *u;
 186
 187     pa_sink_input_assert_ref(i);
 188     pa_assert_se(u = i->userdata);
 189
 190     pa_sink_detach_within_thread(u->sink);
 191 }
 192
 193 /* Called from I/O thread context */
 194 static void sink_input_attach_cb(pa_sink_input *i) {
 195     struct userdata *u;
 196
 197     pa_sink_input_assert_ref(i);
 198     pa_assert_se(u = i->userdata);
 199
 200     pa_sink_set_asyncmsgq(u->sink, i->sink->asyncmsgq);
 201     pa_sink_set_rtpoll(u->sink, i->sink->rtpoll);
 202
 203     pa_sink_attach_within_thread(u->sink);
 204 }
 205
 206 /* Called from main context */
 207 static void sink_input_kill_cb(pa_sink_input *i) {
 208     struct userdata *u;
 209
 210     pa_sink_input_assert_ref(i);
 211     pa_assert_se(u = i->userdata);
 212
 213     pa_sink_input_unlink(u->sink_input);
 214     pa_sink_input_unref(u->sink_input);
 215     u->sink_input = NULL;
 216
 217     pa_sink_unlink(u->sink);
 218     pa_sink_unref(u->sink);
 219     u->sink = NULL;
 220
 221     pa_module_unload_request(u->module);
 222 }
 223
 224 int pa__init(pa_module*m) {
 225     struct userdata *u;
 226     pa_sample_spec ss;
 227     pa_channel_map sink_map, stream_map;
 228     pa_modargs *ma;
 229     char *t;
 230     const char *k;
 231     pa_sink *master;
 232     pa_sink_input_new_data sink_input_data;
 233     pa_sink_new_data sink_data;
 234
 235     pa_assert(m);
 236
 237     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 238         pa_log("Failed to parse module arguments.");
 239         goto fail;
 240     }
 241
 242     if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SINK, 1))) {
 243         pa_log("Master sink not found");
 244         goto fail;
 245     }
 246
 247     ss = master->sample_spec;
 248     sink_map = master->channel_map;
 249     if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &sink_map, PA_CHANNEL_MAP_DEFAULT) < 0) {
 250         pa_log("Invalid sample format specification or channel map");
 251         goto fail;
 252     }
 253
 254     stream_map = sink_map;
 255     if (pa_modargs_get_channel_map(ma, "master_channel_map", &stream_map) < 0) {
 256         pa_log("Invalid master hannel map");
 257         goto fail;
 258     }
 259
 260     if (stream_map.channels != ss.channels) {
 261         pa_log("Number of channels doesn't match");
 262         goto fail;
 263     }
 264
 265     if (pa_channel_map_equal(&stream_map, &master->channel_map))
 266         pa_log_warn("No remapping configured, proceeding nonetheless!");
 267
 268     u = pa_xnew0(struct userdata, 1);
 269     u->core = m->core;
 270     u->module = m;
 271     m->userdata = u;
 272     u->master = master;
 273     u->sink = NULL;
 274     u->sink_input = NULL;
 275
 276     /* Create sink */
 277     pa_sink_new_data_init(&sink_data);
 278     sink_data.driver = __FILE__;
 279     sink_data.module = m;
 280     if (!(sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
 281         sink_data.name = pa_sprintf_malloc("%s.remapped", master->name);
 282     pa_sink_new_data_set_sample_spec(&sink_data, &ss);
 283     pa_sink_new_data_set_channel_map(&sink_data, &sink_map);
 284     k = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
 285     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, t = pa_sprintf_malloc("Remapped %s", k ? k : master->name));
 286     pa_xfree(t);
 287     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
 288
 289     u->sink = pa_sink_new(m->core, &sink_data, 0);
 290     pa_sink_new_data_done(&sink_data);
 291
 292     if (!u->sink) {
 293         pa_log("Failed to create sink.");
 294         goto fail;
 295     }
 296
 297     u->sink->parent.process_msg = sink_process_msg;
 298     u->sink->set_state = sink_set_state;
 299     u->sink->update_requested_latency = sink_update_requested_latency;
 300     u->sink->request_rewind = sink_request_rewind;
 301     u->sink->userdata = u;
 302     u->sink->flags = PA_SINK_LATENCY;
 303
 304     pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq);
 305     pa_sink_set_rtpoll(u->sink, master->rtpoll);
 306
 307     /* Create sink input */
 308     pa_sink_input_new_data_init(&sink_input_data);
 309     sink_input_data.driver = __FILE__;
 310     sink_input_data.module = m;
 311     sink_input_data.sink = u->master;
 312     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Remapped Stream");
 313     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "routing");
 314     pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
 315     pa_sink_input_new_data_set_channel_map(&sink_input_data, &stream_map);
 316
 317     u->sink_input = pa_sink_input_new(m->core, &sink_input_data, PA_SINK_INPUT_DONT_MOVE);
 318     pa_sink_input_new_data_done(&sink_input_data);
 319
 320     if (!u->sink_input)
 321         goto fail;
 322
 323     u->sink_input->parent.process_msg = sink_input_process_msg;
 324     u->sink_input->pop = sink_input_pop_cb;
 325     u->sink_input->rewind = sink_input_rewind_cb;
 326     u->sink_input->set_max_rewind = sink_input_set_max_rewind_cb;
 327     u->sink_input->kill = sink_input_kill_cb;
 328     u->sink_input->attach = sink_input_attach_cb;
 329     u->sink_input->detach = sink_input_detach_cb;
 330     u->sink_input->userdata = u;
 331
 332     pa_sink_put(u->sink);
 333     pa_sink_input_put(u->sink_input);
 334
 335     pa_modargs_free(ma);
 336
 337     return 0;
 338
 339 fail:
 340     if (ma)
 341         pa_modargs_free(ma);
 342
 343     pa__done(m);
 344
 345     return -1;
 346 }
 347
 348 void pa__done(pa_module*m) {
 349     struct userdata *u;
 350
 351     pa_assert(m);
 352
 353     if (!(u = m->userdata))
 354         return;
 355
 356     if (u->sink_input) {
 357         pa_sink_input_unlink(u->sink_input);
 358         pa_sink_input_unref(u->sink_input);
 359     }
 360
 361     if (u->sink) {
 362         pa_sink_unlink(u->sink);
 363         pa_sink_unref(u->sink);
 364     }
 365
 366     pa_xfree(u);
 367 }