code.delx.au - pulseaudio/blob - polyp/source-output.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 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 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 "source-output.h"
  32 #include "xmalloc.h"
  33 #include "subscribe.h"
  34 #include "log.h"
  35
  36 struct pa_source_output* pa_source_output_new(struct pa_source *s, const char *name, const struct pa_sample_spec *spec) {
  37     struct pa_source_output *o;
  38     struct pa_resampler *resampler = NULL;
  39     int r;
  40     assert(s && spec);
  41
  42     if (pa_idxset_ncontents(s->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
  43         pa_log(__FILE__": Failed to create source output: too many outputs per source.\n");
  44         return NULL;
  45     }
  46
  47     if (!pa_sample_spec_equal(&s->sample_spec, spec))
  48         if (!(resampler = pa_resampler_new(&s->sample_spec, spec, s->core->memblock_stat)))
  49             return NULL;
  50
  51     o = pa_xmalloc(sizeof(struct pa_source_output));
  52     o->name = pa_xstrdup(name);
  53     o->client = NULL;
  54     o->owner = NULL;
  55     o->source = s;
  56     o->sample_spec = *spec;
  57
  58     o->push = NULL;
  59     o->kill = NULL;
  60     o->userdata = NULL;
  61     o->resampler = resampler;
  62
  63     assert(s->core);
  64     r = pa_idxset_put(s->core->source_outputs, o, &o->index);
  65     assert(r == 0 && o->index != PA_IDXSET_INVALID);
  66     r = pa_idxset_put(s->outputs, o, NULL);
  67     assert(r == 0);
  68
  69     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
  70
  71     return o;
  72 }
  73
  74 void pa_source_output_free(struct pa_source_output* o) {
  75     assert(o);
  76
  77     assert(o->source && o->source->core);
  78     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
  79     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
  80
  81     if (o->resampler)
  82         pa_resampler_free(o->resampler);
  83
  84     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
  85
  86     pa_xfree(o->name);
  87     pa_xfree(o);
  88 }
  89
  90 void pa_source_output_kill(struct pa_source_output*i) {
  91     assert(i);
  92
  93     if (i->kill)
  94         i->kill(i);
  95 }
  96
  97 void pa_source_output_push(struct pa_source_output *o, const struct pa_memchunk *chunk) {
  98     struct pa_memchunk rchunk;
  99     assert(o && chunk && chunk->length && o->push);
 100
 101     if (!o->resampler) {
 102         o->push(o, chunk);
 103         return;
 104     }
 105
 106     pa_resampler_run(o->resampler, chunk, &rchunk);
 107     if (!rchunk.length)
 108         return;
 109
 110     assert(rchunk.memblock);
 111     o->push(o, &rchunk);
 112     pa_memblock_unref(rchunk.memblock);
 113 }