code.delx.au - pulseaudio/blob - src/pulsecore/source-output.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 <stdio.h>
  29 #include <assert.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include <pulse/utf8.h>
  34 #include <pulse/xmalloc.h>
  35
  36 #include <pulsecore/core-subscribe.h>
  37 #include <pulsecore/log.h>
  38 #include <pulsecore/namereg.h>
  39
  40 #include "source-output.h"
  41
  42 #define CHECK_VALIDITY_RETURN_NULL(condition) \
  43 do {\
  44 if (!(condition)) \
  45     return NULL; \
  46 } while (0)
  47
  48 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data) {
  49     assert(data);
  50
  51     memset(data, 0, sizeof(*data));
  52     data->resample_method = PA_RESAMPLER_INVALID;
  53     return data;
  54 }
  55
  56 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map) {
  57     assert(data);
  58
  59     if ((data->channel_map_is_set = !!map))
  60         data->channel_map = *map;
  61 }
  62
  63 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec) {
  64     assert(data);
  65
  66     if ((data->sample_spec_is_set = !!spec))
  67         data->sample_spec = *spec;
  68 }
  69
  70 pa_source_output* pa_source_output_new(
  71         pa_core *core,
  72         pa_source_output_new_data *data,
  73         pa_source_output_flags_t flags) {
  74
  75     pa_source_output *o;
  76     pa_resampler *resampler = NULL;
  77     int r;
  78     char st[PA_SAMPLE_SPEC_SNPRINT_MAX];
  79
  80     assert(core);
  81     assert(data);
  82
  83     if (!(flags & PA_SOURCE_OUTPUT_NO_HOOKS))
  84         if (pa_hook_fire(&core->hook_source_output_new, data) < 0)
  85             return NULL;
  86
  87     CHECK_VALIDITY_RETURN_NULL(!data->driver || pa_utf8_valid(data->driver));
  88     CHECK_VALIDITY_RETURN_NULL(!data->name || pa_utf8_valid(data->name));
  89
  90     if (!data->source)
  91         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
  92
  93     CHECK_VALIDITY_RETURN_NULL(data->source);
  94     CHECK_VALIDITY_RETURN_NULL(data->source->state == PA_SOURCE_RUNNING);
  95
  96     if (!data->sample_spec_is_set)
  97         data->sample_spec = data->source->sample_spec;
  98
  99     CHECK_VALIDITY_RETURN_NULL(pa_sample_spec_valid(&data->sample_spec));
 100
 101     if (!data->channel_map_is_set)
 102         pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 103
 104     CHECK_VALIDITY_RETURN_NULL(pa_channel_map_valid(&data->channel_map));
 105     CHECK_VALIDITY_RETURN_NULL(data->channel_map.channels == data->sample_spec.channels);
 106
 107     if (data->resample_method == PA_RESAMPLER_INVALID)
 108         data->resample_method = core->resample_method;
 109
 110     CHECK_VALIDITY_RETURN_NULL(data->resample_method < PA_RESAMPLER_MAX);
 111
 112     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 113         pa_log("Failed to create source output: too many outputs per source.");
 114         return NULL;
 115     }
 116
 117     if (!pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 118         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map))
 119         if (!(resampler = pa_resampler_new(
 120                       core->mempool,
 121                       &data->source->sample_spec, &data->source->channel_map,
 122                       &data->sample_spec, &data->channel_map,
 123                       data->resample_method))) {
 124             pa_log_warn("Unsupported resampling operation.");
 125             return NULL;
 126         }
 127
 128     o = pa_xnew(pa_source_output, 1);
 129     o->ref = 1;
 130     o->state = PA_SOURCE_OUTPUT_RUNNING;
 131     o->name = pa_xstrdup(data->name);
 132     o->driver = pa_xstrdup(data->driver);
 133     o->module = data->module;
 134     o->source = data->source;
 135     o->client = data->client;
 136
 137     o->sample_spec = data->sample_spec;
 138     o->channel_map = data->channel_map;
 139
 140     o->push = NULL;
 141     o->kill = NULL;
 142     o->get_latency = NULL;
 143     o->userdata = NULL;
 144
 145     o->resampler = resampler;
 146     o->resample_method = data->resample_method;
 147
 148     r = pa_idxset_put(core->source_outputs, o, &o->index);
 149     assert(r == 0);
 150     r = pa_idxset_put(o->source->outputs, o, NULL);
 151     assert(r == 0);
 152
 153     pa_log_info("created %u \"%s\" on %s with sample spec %s",
 154                 o->index,
 155                 o->name,
 156                 o->source->name,
 157                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec));
 158
 159     pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 160
 161     /* We do not call pa_source_notify() here, because the virtual
 162      * functions have not yet been initialized */
 163
 164     return o;
 165 }
 166
 167 void pa_source_output_disconnect(pa_source_output*o) {
 168     assert(o);
 169     assert(o->state != PA_SOURCE_OUTPUT_DISCONNECTED);
 170     assert(o->source);
 171     assert(o->source->core);
 172
 173     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 174     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
 175
 176     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 177     o->source = NULL;
 178
 179     o->push = NULL;
 180     o->kill = NULL;
 181     o->get_latency = NULL;
 182
 183     o->state = PA_SOURCE_OUTPUT_DISCONNECTED;
 184 }
 185
 186 static void source_output_free(pa_source_output* o) {
 187     assert(o);
 188
 189     if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
 190         pa_source_output_disconnect(o);
 191
 192     pa_log_info("freed %u \"%s\"", o->index, o->name);
 193
 194     if (o->resampler)
 195         pa_resampler_free(o->resampler);
 196
 197     pa_xfree(o->name);
 198     pa_xfree(o->driver);
 199     pa_xfree(o);
 200 }
 201
 202 void pa_source_output_unref(pa_source_output* o) {
 203     assert(o);
 204     assert(o->ref >= 1);
 205
 206     if (!(--o->ref))
 207         source_output_free(o);
 208 }
 209
 210 pa_source_output* pa_source_output_ref(pa_source_output *o) {
 211     assert(o);
 212     assert(o->ref >= 1);
 213
 214     o->ref++;
 215     return o;
 216 }
 217
 218 void pa_source_output_kill(pa_source_output*o) {
 219     assert(o);
 220     assert(o->ref >= 1);
 221
 222     if (o->kill)
 223         o->kill(o);
 224 }
 225
 226 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 227     pa_memchunk rchunk;
 228
 229     assert(o);
 230     assert(chunk);
 231     assert(chunk->length);
 232     assert(o->push);
 233
 234     if (o->state == PA_SOURCE_OUTPUT_CORKED)
 235         return;
 236
 237     if (!o->resampler) {
 238         o->push(o, chunk);
 239         return;
 240     }
 241
 242     pa_resampler_run(o->resampler, chunk, &rchunk);
 243     if (!rchunk.length)
 244         return;
 245
 246     assert(rchunk.memblock);
 247     o->push(o, &rchunk);
 248     pa_memblock_unref(rchunk.memblock);
 249 }
 250
 251 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 252     assert(o);
 253     assert(o->ref >= 1);
 254
 255     if (!o->name && !name)
 256         return;
 257
 258     if (o->name && name && !strcmp(o->name, name))
 259         return;
 260
 261     pa_xfree(o->name);
 262     o->name = pa_xstrdup(name);
 263
 264     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 265 }
 266
 267 pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
 268     assert(o);
 269     assert(o->ref >= 1);
 270
 271     if (o->get_latency)
 272         return o->get_latency(o);
 273
 274     return 0;
 275 }
 276
 277 void pa_source_output_cork(pa_source_output *o, int b) {
 278     int n;
 279
 280     assert(o);
 281     assert(o->ref >= 1);
 282
 283     if (o->state == PA_SOURCE_OUTPUT_DISCONNECTED)
 284         return;
 285
 286     n = o->state == PA_SOURCE_OUTPUT_CORKED && !b;
 287
 288     o->state = b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 289
 290     if (n)
 291         pa_source_notify(o->source);
 292 }
 293
 294 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 295     assert(o);
 296     assert(o->ref >= 1);
 297
 298     if (!o->resampler)
 299         return o->resample_method;
 300
 301     return pa_resampler_get_method(o->resampler);
 302 }
 303
 304 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 305     pa_source *origin;
 306     pa_resampler *new_resampler = NULL;
 307
 308     assert(o);
 309     assert(o->ref >= 1);
 310     assert(dest);
 311
 312     origin = o->source;
 313
 314     if (dest == origin)
 315         return 0;
 316
 317     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 318         pa_log_warn("Failed to move source output: too many outputs per source.");
 319         return -1;
 320     }
 321
 322     if (o->resampler &&
 323         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 324         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 325
 326         /* Try to reuse the old resampler if possible */
 327         new_resampler = o->resampler;
 328
 329     else if (!pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 330         !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 331
 332         /* Okey, we need a new resampler for the new sink */
 333
 334         if (!(new_resampler = pa_resampler_new(
 335                       dest->core->mempool,
 336                       &dest->sample_spec, &dest->channel_map,
 337                       &o->sample_spec, &o->channel_map,
 338                       o->resample_method))) {
 339             pa_log_warn("Unsupported resampling operation.");
 340             return -1;
 341         }
 342     }
 343
 344     /* Okey, let's move it */
 345     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 346     pa_idxset_put(dest->outputs, o, NULL);
 347     o->source = dest;
 348
 349     /* Replace resampler */
 350     if (new_resampler != o->resampler) {
 351         if (o->resampler)
 352             pa_resampler_free(o->resampler);
 353         o->resampler = new_resampler;
 354     }
 355
 356     /* Notify everyone */
 357     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 358     pa_source_notify(o->source);
 359
 360     return 0;
 361 }