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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio 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   PulseAudio 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 PulseAudio; 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 <pulse/utf8.h>
  32 #include <pulse/xmalloc.h>
  33
  34 #include <pulsecore/core-subscribe.h>
  35 #include <pulsecore/log.h>
  36 #include <pulsecore/namereg.h>
  37
  38 #include "source-output.h"
  39
  40 #define CHECK_VALIDITY_RETURN_NULL(condition) \
  41 do {\
  42 if (!(condition)) \
  43     return NULL; \
  44 } while (0)
  45
  46 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data) {
  47     assert(data);
  48
  49     memset(data, 0, sizeof(*data));
  50     data->resample_method = PA_RESAMPLER_INVALID;
  51     return data;
  52 }
  53
  54 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map) {
  55     assert(data);
  56
  57     if ((data->channel_map_is_set = !!map))
  58         data->channel_map = *map;
  59 }
  60
  61 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec) {
  62     assert(data);
  63
  64     if ((data->sample_spec_is_set = !!spec))
  65         data->sample_spec = *spec;
  66 }
  67
  68 pa_source_output* pa_source_output_new(
  69         pa_core *core,
  70         pa_source_output_new_data *data,
  71         pa_source_output_flags_t flags) {
  72
  73     pa_source_output *o;
  74     pa_resampler *resampler = NULL;
  75     int r;
  76     char st[PA_SAMPLE_SPEC_SNPRINT_MAX];
  77
  78     assert(core);
  79     assert(data);
  80
  81     if (!(flags & PA_SOURCE_OUTPUT_NO_HOOKS))
  82         if (pa_hook_fire(&core->hook_source_output_new, data) < 0)
  83             return NULL;
  84
  85     CHECK_VALIDITY_RETURN_NULL(!data->driver || pa_utf8_valid(data->driver));
  86     CHECK_VALIDITY_RETURN_NULL(!data->name || pa_utf8_valid(data->name));
  87
  88     if (!data->source)
  89         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
  90
  91     CHECK_VALIDITY_RETURN_NULL(data->source);
  92     CHECK_VALIDITY_RETURN_NULL(data->source->state == PA_SOURCE_RUNNING);
  93
  94     if (!data->sample_spec_is_set)
  95         data->sample_spec = data->source->sample_spec;
  96
  97     CHECK_VALIDITY_RETURN_NULL(pa_sample_spec_valid(&data->sample_spec));
  98
  99     if (!data->channel_map_is_set)
 100         pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 101
 102     CHECK_VALIDITY_RETURN_NULL(pa_channel_map_valid(&data->channel_map));
 103     CHECK_VALIDITY_RETURN_NULL(data->channel_map.channels == data->sample_spec.channels);
 104
 105     if (data->resample_method == PA_RESAMPLER_INVALID)
 106         data->resample_method = core->resample_method;
 107
 108     CHECK_VALIDITY_RETURN_NULL(data->resample_method < PA_RESAMPLER_MAX);
 109
 110     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 111         pa_log("Failed to create source output: too many outputs per source.");
 112         return NULL;
 113     }
 114
 115     if (!pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 116         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map))
 117         if (!(resampler = pa_resampler_new(
 118                       core->mempool,
 119                       &data->source->sample_spec, &data->source->channel_map,
 120                       &data->sample_spec, &data->channel_map,
 121                       data->resample_method))) {
 122             pa_log_warn("Unsupported resampling operation.");
 123             return NULL;
 124         }
 125
 126     o = pa_xnew(pa_source_output, 1);
 127     o->ref = 1;
 128     o->state = PA_SOURCE_OUTPUT_RUNNING;
 129     o->name = pa_xstrdup(data->name);
 130     o->driver = pa_xstrdup(data->driver);
 131     o->module = data->module;
 132     o->source = data->source;
 133     o->client = data->client;
 134
 135     o->sample_spec = data->sample_spec;
 136     o->channel_map = data->channel_map;
 137
 138     o->push = NULL;
 139     o->kill = NULL;
 140     o->get_latency = NULL;
 141     o->userdata = NULL;
 142
 143     o->resampler = resampler;
 144     o->resample_method = data->resample_method;
 145
 146     r = pa_idxset_put(core->source_outputs, o, &o->index);
 147     assert(r == 0);
 148     r = pa_idxset_put(o->source->outputs, o, NULL);
 149     assert(r == 0);
 150
 151     pa_log_info("created %u \"%s\" on %s with sample spec %s",
 152                 o->index,
 153                 o->name,
 154                 o->source->name,
 155                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec));
 156
 157     pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 158
 159     /* We do not call pa_source_notify() here, because the virtual
 160      * functions have not yet been initialized */
 161
 162     return o;
 163 }
 164
 165 void pa_source_output_disconnect(pa_source_output*o) {
 166     assert(o);
 167     assert(o->state != PA_SOURCE_OUTPUT_DISCONNECTED);
 168     assert(o->source);
 169     assert(o->source->core);
 170
 171     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 172     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
 173
 174     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 175     o->source = NULL;
 176
 177     o->push = NULL;
 178     o->kill = NULL;
 179     o->get_latency = NULL;
 180
 181     o->state = PA_SOURCE_OUTPUT_DISCONNECTED;
 182 }
 183
 184 static void source_output_free(pa_source_output* o) {
 185     assert(o);
 186
 187     if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
 188         pa_source_output_disconnect(o);
 189
 190     pa_log_info("freed %u \"%s\"", o->index, o->name);
 191
 192     if (o->resampler)
 193         pa_resampler_free(o->resampler);
 194
 195     pa_xfree(o->name);
 196     pa_xfree(o->driver);
 197     pa_xfree(o);
 198 }
 199
 200 void pa_source_output_unref(pa_source_output* o) {
 201     assert(o);
 202     assert(o->ref >= 1);
 203
 204     if (!(--o->ref))
 205         source_output_free(o);
 206 }
 207
 208 pa_source_output* pa_source_output_ref(pa_source_output *o) {
 209     assert(o);
 210     assert(o->ref >= 1);
 211
 212     o->ref++;
 213     return o;
 214 }
 215
 216 void pa_source_output_kill(pa_source_output*o) {
 217     assert(o);
 218     assert(o->ref >= 1);
 219
 220     if (o->kill)
 221         o->kill(o);
 222 }
 223
 224 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 225     pa_memchunk rchunk;
 226
 227     assert(o);
 228     assert(chunk);
 229     assert(chunk->length);
 230     assert(o->push);
 231
 232     if (o->state == PA_SOURCE_OUTPUT_CORKED)
 233         return;
 234
 235     if (!o->resampler) {
 236         o->push(o, chunk);
 237         return;
 238     }
 239
 240     pa_resampler_run(o->resampler, chunk, &rchunk);
 241     if (!rchunk.length)
 242         return;
 243
 244     assert(rchunk.memblock);
 245     o->push(o, &rchunk);
 246     pa_memblock_unref(rchunk.memblock);
 247 }
 248
 249 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 250     assert(o);
 251     assert(o->ref >= 1);
 252
 253     if (!o->name && !name)
 254         return;
 255
 256     if (o->name && name && !strcmp(o->name, name))
 257         return;
 258
 259     pa_xfree(o->name);
 260     o->name = pa_xstrdup(name);
 261
 262     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 263 }
 264
 265 pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
 266     assert(o);
 267     assert(o->ref >= 1);
 268
 269     if (o->get_latency)
 270         return o->get_latency(o);
 271
 272     return 0;
 273 }
 274
 275 void pa_source_output_cork(pa_source_output *o, int b) {
 276     int n;
 277
 278     assert(o);
 279     assert(o->ref >= 1);
 280
 281     if (o->state == PA_SOURCE_OUTPUT_DISCONNECTED)
 282         return;
 283
 284     n = o->state == PA_SOURCE_OUTPUT_CORKED && !b;
 285
 286     o->state = b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 287
 288     if (n)
 289         pa_source_notify(o->source);
 290 }
 291
 292 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 293     assert(o);
 294     assert(o->ref >= 1);
 295
 296     if (!o->resampler)
 297         return o->resample_method;
 298
 299     return pa_resampler_get_method(o->resampler);
 300 }
 301
 302 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 303     pa_source *origin;
 304     pa_resampler *new_resampler = NULL;
 305
 306     assert(o);
 307     assert(o->ref >= 1);
 308     assert(dest);
 309
 310     origin = o->source;
 311
 312     if (dest == origin)
 313         return 0;
 314
 315     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 316         pa_log_warn("Failed to move source output: too many outputs per source.");
 317         return -1;
 318     }
 319
 320     if (o->resampler &&
 321         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 322         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 323
 324         /* Try to reuse the old resampler if possible */
 325         new_resampler = o->resampler;
 326
 327     else if (!pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 328         !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 329
 330         /* Okey, we need a new resampler for the new sink */
 331
 332         if (!(new_resampler = pa_resampler_new(
 333                       dest->core->mempool,
 334                       &dest->sample_spec, &dest->channel_map,
 335                       &o->sample_spec, &o->channel_map,
 336                       o->resample_method))) {
 337             pa_log_warn("Unsupported resampling operation.");
 338             return -1;
 339         }
 340     }
 341
 342     /* Okey, let's move it */
 343     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 344     pa_idxset_put(dest->outputs, o, NULL);
 345     o->source = dest;
 346
 347     /* Replace resampler */
 348     if (new_resampler != o->resampler) {
 349         if (o->resampler)
 350             pa_resampler_free(o->resampler);
 351         o->resampler = new_resampler;
 352     }
 353
 354     /* Notify everyone */
 355     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 356     pa_source_notify(o->source);
 357
 358     return 0;
 359 }