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