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->ref = 1;
  53     o->state = PA_SOURCE_OUTPUT_RUNNING;
  54     o->name = pa_xstrdup(name);
  55     o->client = NULL;
  56     o->owner = NULL;
  57     o->source = s;
  58     o->sample_spec = *spec;
  59
  60     o->push = NULL;
  61     o->kill = NULL;
  62     o->userdata = NULL;
  63     o->resampler = resampler;
  64
  65     assert(s->core);
  66     r = pa_idxset_put(s->core->source_outputs, o, &o->index);
  67     assert(r == 0 && o->index != PA_IDXSET_INVALID);
  68     r = pa_idxset_put(s->outputs, o, NULL);
  69     assert(r == 0);
  70
  71     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
  72
  73     return o;
  74 }
  75
  76 void pa_source_output_disconnect(struct pa_source_output*o) {
  77     assert(o && o->state == PA_SOURCE_OUTPUT_RUNNING && o->source && o->source->core);
  78
  79     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
  80     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
  81
  82     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
  83     o->source = NULL;
  84
  85     o->push = NULL;
  86     o->kill = NULL;
  87
  88
  89     o->state = PA_SOURCE_OUTPUT_DISCONNECTED;
  90 }
  91
  92 static void source_output_free(struct pa_source_output* o) {
  93     assert(o);
  94
  95     if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
  96         pa_source_output_disconnect(o);
  97
  98     if (o->resampler)
  99         pa_resampler_free(o->resampler);
 100
 101     pa_xfree(o->name);
 102     pa_xfree(o);
 103 }
 104
 105
 106 void pa_source_output_unref(struct pa_source_output* o) {
 107     assert(o && o->ref >= 1);
 108
 109     if (!(--o->ref))
 110         source_output_free(o);
 111 }
 112
 113 struct pa_source_output* pa_source_output_ref(struct pa_source_output *o) {
 114     assert(o && o->ref >= 1);
 115     o->ref++;
 116     return o;
 117 }
 118
 119
 120 void pa_source_output_kill(struct pa_source_output*o) {
 121     assert(o && o->ref >= 1);
 122
 123     if (o->kill)
 124         o->kill(o);
 125 }
 126
 127 void pa_source_output_push(struct pa_source_output *o, const struct pa_memchunk *chunk) {
 128     struct pa_memchunk rchunk;
 129     assert(o && chunk && chunk->length && o->push);
 130
 131     if (!o->resampler) {
 132         o->push(o, chunk);
 133         return;
 134     }
 135
 136     pa_resampler_run(o->resampler, chunk, &rchunk);
 137     if (!rchunk.length)
 138         return;
 139
 140     assert(rchunk.memblock);
 141     o->push(o, &rchunk);
 142     pa_memblock_unref(rchunk.memblock);
 143 }
 144
 145 void pa_source_output_set_name(struct pa_source_output *o, const char *name) {
 146     assert(o && o->ref >= 1);
 147     pa_xfree(o->name);
 148     o->name = pa_xstrdup(name);
 149 }