code.delx.au - pulseaudio/blob - src/polypcore/sink-input.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 <stdio.h>
  27 #include <assert.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include <polyp/utf8.h>
  32 #include <polyp/xmalloc.h>
  33
  34 #include <polypcore/sample-util.h>
  35 #include <polypcore/core-subscribe.h>
  36 #include <polypcore/log.h>
  37
  38 #include "sink-input.h"
  39
  40 #define CONVERT_BUFFER_LENGTH 4096
  41
  42 #define CHECK_VALIDITY_RETURN_NULL(condition) \
  43 do {\
  44 if (!(condition)) \
  45     return NULL; \
  46 } while (0)
  47
  48 pa_sink_input* pa_sink_input_new(
  49         pa_sink *s,
  50         const char *driver,
  51         const char *name,
  52         const pa_sample_spec *spec,
  53         const pa_channel_map *map,
  54         const pa_cvolume *volume,
  55         int variable_rate,
  56         int resample_method) {
  57
  58     pa_sink_input *i;
  59     pa_resampler *resampler = NULL;
  60     int r;
  61     char st[256];
  62     pa_channel_map tmap;
  63     pa_cvolume tvol;
  64
  65     assert(s);
  66     assert(spec);
  67     assert(s->state == PA_SINK_RUNNING);
  68
  69     CHECK_VALIDITY_RETURN_NULL(pa_sample_spec_valid(spec));
  70
  71     if (!map)
  72         map = pa_channel_map_init_auto(&tmap, spec->channels, PA_CHANNEL_MAP_DEFAULT);
  73     if (!volume)
  74         volume = pa_cvolume_reset(&tvol, spec->channels);
  75
  76     CHECK_VALIDITY_RETURN_NULL(map && pa_channel_map_valid(map));
  77     CHECK_VALIDITY_RETURN_NULL(volume && pa_cvolume_valid(volume));
  78     CHECK_VALIDITY_RETURN_NULL(map->channels == spec->channels);
  79     CHECK_VALIDITY_RETURN_NULL(volume->channels == spec->channels);
  80     CHECK_VALIDITY_RETURN_NULL(!driver || pa_utf8_valid(driver));
  81     CHECK_VALIDITY_RETURN_NULL(pa_utf8_valid(name));
  82
  83     if (pa_idxset_size(s->inputs) >= PA_MAX_INPUTS_PER_SINK) {
  84         pa_log_warn(__FILE__": Failed to create sink input: too many inputs per sink.");
  85         return NULL;
  86     }
  87
  88     if (resample_method == PA_RESAMPLER_INVALID)
  89         resample_method = s->core->resample_method;
  90
  91     if (variable_rate || !pa_sample_spec_equal(spec, &s->sample_spec) || !pa_channel_map_equal(map, &s->channel_map))
  92         if (!(resampler = pa_resampler_new(spec, map, &s->sample_spec, &s->channel_map, s->core->memblock_stat, resample_method)))
  93             return NULL;
  94
  95     i = pa_xnew(pa_sink_input, 1);
  96     i->ref = 1;
  97     i->state = PA_SINK_INPUT_RUNNING;
  98     i->name = pa_xstrdup(name);
  99     i->driver = pa_xstrdup(driver);
 100     i->owner = NULL;
 101     i->sink = s;
 102     i->client = NULL;
 103
 104     i->sample_spec = *spec;
 105     i->channel_map = *map;
 106     i->volume = *volume;
 107
 108     i->peek = NULL;
 109     i->drop = NULL;
 110     i->kill = NULL;
 111     i->get_latency = NULL;
 112     i->underrun = NULL;
 113     i->userdata = NULL;
 114
 115     i->playing = 0;
 116
 117     pa_memchunk_reset(&i->resampled_chunk);
 118     i->resampler = resampler;
 119
 120     assert(s->core);
 121     r = pa_idxset_put(s->core->sink_inputs, i, &i->index);
 122     assert(r == 0 && i->index != PA_IDXSET_INVALID);
 123     r = pa_idxset_put(s->inputs, i, NULL);
 124     assert(r == 0);
 125
 126     pa_sample_spec_snprint(st, sizeof(st), spec);
 127     pa_log_info(__FILE__": created %u \"%s\" on %u with sample spec \"%s\"", i->index, i->name, s->index, st);
 128
 129     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
 130
 131     return i;
 132 }
 133
 134 void pa_sink_input_disconnect(pa_sink_input *i) {
 135     assert(i);
 136     assert(i->state != PA_SINK_INPUT_DISCONNECTED);
 137     assert(i->sink);
 138     assert(i->sink->core);
 139
 140     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
 141     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
 142
 143     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 144     i->sink = NULL;
 145
 146     i->peek = NULL;
 147     i->drop = NULL;
 148     i->kill = NULL;
 149     i->get_latency = NULL;
 150     i->underrun = NULL;
 151
 152     i->playing = 0;
 153     i->state = PA_SINK_INPUT_DISCONNECTED;
 154 }
 155
 156 static void sink_input_free(pa_sink_input* i) {
 157     assert(i);
 158
 159     if (i->state != PA_SINK_INPUT_DISCONNECTED)
 160         pa_sink_input_disconnect(i);
 161
 162     pa_log_info(__FILE__": freed %u \"%s\"", i->index, i->name);
 163
 164     if (i->resampled_chunk.memblock)
 165         pa_memblock_unref(i->resampled_chunk.memblock);
 166
 167     if (i->resampler)
 168         pa_resampler_free(i->resampler);
 169
 170     pa_xfree(i->name);
 171     pa_xfree(i->driver);
 172     pa_xfree(i);
 173 }
 174
 175 void pa_sink_input_unref(pa_sink_input *i) {
 176     assert(i);
 177     assert(i->ref >= 1);
 178
 179     if (!(--i->ref))
 180         sink_input_free(i);
 181 }
 182
 183 pa_sink_input* pa_sink_input_ref(pa_sink_input *i) {
 184     assert(i);
 185     assert(i->ref >= 1);
 186
 187     i->ref++;
 188     return i;
 189 }
 190
 191 void pa_sink_input_kill(pa_sink_input*i) {
 192     assert(i);
 193     assert(i->ref >= 1);
 194
 195     if (i->kill)
 196         i->kill(i);
 197 }
 198
 199 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i) {
 200     pa_usec_t r = 0;
 201
 202     assert(i);
 203     assert(i->ref >= 1);
 204
 205     if (i->get_latency)
 206         r += i->get_latency(i);
 207
 208     if (i->resampled_chunk.memblock)
 209         r += pa_bytes_to_usec(i->resampled_chunk.length, &i->sample_spec);
 210
 211     return r;
 212 }
 213
 214 int pa_sink_input_peek(pa_sink_input *i, pa_memchunk *chunk, pa_cvolume *volume) {
 215     int ret = -1;
 216     int do_volume_adj_here;
 217
 218     assert(i);
 219     assert(i->ref >= 1);
 220     assert(chunk);
 221     assert(volume);
 222
 223     pa_sink_input_ref(i);
 224
 225     if (!i->peek || !i->drop || i->state == PA_SINK_INPUT_CORKED)
 226         goto finish;
 227
 228     if (!i->resampler) {
 229         do_volume_adj_here = 0;
 230         ret = i->peek(i, chunk);
 231         goto finish;
 232     }
 233
 234     do_volume_adj_here = !pa_channel_map_equal(&i->channel_map, &i->sink->channel_map);
 235
 236     while (!i->resampled_chunk.memblock) {
 237         pa_memchunk tchunk;
 238         size_t l;
 239
 240         if ((ret = i->peek(i, &tchunk)) < 0)
 241             goto finish;
 242
 243         assert(tchunk.length);
 244
 245         l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
 246
 247         if (l > tchunk.length)
 248             l = tchunk.length;
 249
 250         i->drop(i, &tchunk, l);
 251         tchunk.length = l;
 252
 253         /* It might be necessary to adjust the volume here */
 254         if (do_volume_adj_here) {
 255             pa_memchunk_make_writable(&tchunk, i->sink->core->memblock_stat, 0);
 256             pa_volume_memchunk(&tchunk, &i->sample_spec, &i->volume);
 257         }
 258
 259         pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
 260         pa_memblock_unref(tchunk.memblock);
 261     }
 262
 263     assert(i->resampled_chunk.memblock);
 264     assert(i->resampled_chunk.length);
 265
 266     *chunk = i->resampled_chunk;
 267     pa_memblock_ref(i->resampled_chunk.memblock);
 268
 269     ret = 0;
 270
 271 finish:
 272
 273     if (ret < 0 && i->playing && i->underrun)
 274         i->underrun(i);
 275
 276     i->playing = ret >= 0;
 277
 278     if (ret >= 0) {
 279         /* Let's see if we had to apply the volume adjustment
 280          * ourselves, or if this can be done by the sink for us */
 281
 282         if (do_volume_adj_here)
 283             /* We had different channel maps, so we already did the adjustment */
 284             pa_cvolume_reset(volume, i->sink->sample_spec.channels);
 285         else
 286             /* We've both the same channel map, so let's have the sink do the adjustment for us*/
 287             *volume = i->volume;
 288     }
 289
 290     pa_sink_input_unref(i);
 291
 292     return ret;
 293 }
 294
 295 void pa_sink_input_drop(pa_sink_input *i, const pa_memchunk *chunk, size_t length) {
 296     assert(i);
 297     assert(i->ref >= 1);
 298     assert(length > 0);
 299
 300     if (!i->resampler) {
 301         if (i->drop)
 302             i->drop(i, chunk, length);
 303         return;
 304     }
 305
 306     assert(i->resampled_chunk.memblock);
 307     assert(i->resampled_chunk.length >= length);
 308
 309     i->resampled_chunk.index += length;
 310     i->resampled_chunk.length -= length;
 311
 312     if (i->resampled_chunk.length <= 0) {
 313         pa_memblock_unref(i->resampled_chunk.memblock);
 314         i->resampled_chunk.memblock = NULL;
 315         i->resampled_chunk.index = i->resampled_chunk.length = 0;
 316     }
 317 }
 318
 319 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume) {
 320     assert(i);
 321     assert(i->ref >= 1);
 322     assert(i->sink);
 323     assert(i->sink->core);
 324
 325     if (pa_cvolume_equal(&i->volume, volume))
 326         return;
 327
 328     i->volume = *volume;
 329     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 330 }
 331
 332 const pa_cvolume * pa_sink_input_get_volume(pa_sink_input *i) {
 333     assert(i);
 334     assert(i->ref >= 1);
 335
 336     return &i->volume;
 337 }
 338
 339 void pa_sink_input_cork(pa_sink_input *i, int b) {
 340     int n;
 341
 342     assert(i);
 343     assert(i->ref >= 1);
 344
 345     if (i->state == PA_SINK_INPUT_DISCONNECTED)
 346         return;
 347
 348     n = i->state == PA_SINK_INPUT_CORKED && !b;
 349
 350     i->state = b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
 351
 352     if (n)
 353         pa_sink_notify(i->sink);
 354 }
 355
 356 void pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
 357     assert(i);
 358     assert(i->resampler);
 359     assert(i->ref >= 1);
 360
 361     if (i->sample_spec.rate == rate)
 362         return;
 363
 364     i->sample_spec.rate = rate;
 365     pa_resampler_set_input_rate(i->resampler, rate);
 366 }
 367
 368 void pa_sink_input_set_name(pa_sink_input *i, const char *name) {
 369     assert(i);
 370     assert(i->ref >= 1);
 371
 372     pa_xfree(i->name);
 373     i->name = pa_xstrdup(name);
 374
 375     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 376 }
 377
 378 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i) {
 379     assert(i);
 380     assert(i->ref >= 1);
 381
 382     if (!i->resampler)
 383         return PA_RESAMPLER_INVALID;
 384
 385     return pa_resampler_get_method(i->resampler);
 386 }