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, s->core->resample_method)))
  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->get_latency = NULL;
  64
  65     o->resampler = resampler;
  66
  67     assert(s->core);
  68     r = pa_idxset_put(s->core->source_outputs, o, &o->index);
  69     assert(r == 0 && o->index != PA_IDXSET_INVALID);
  70     r = pa_idxset_put(s->outputs, o, NULL);
  71     assert(r == 0);
  72
  73     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
  74
  75     return o;
  76 }
  77
  78 void pa_source_output_disconnect(struct pa_source_output*o) {
  79     assert(o && o->state == PA_SOURCE_OUTPUT_RUNNING && o->source && o->source->core);
  80
  81     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
  82     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
  83
  84     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
  85     o->source = NULL;
  86
  87     o->push = NULL;
  88     o->kill = NULL;
  89
  90
  91     o->state = PA_SOURCE_OUTPUT_DISCONNECTED;
  92 }
  93
  94 static void source_output_free(struct pa_source_output* o) {
  95     assert(o);
  96
  97     if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
  98         pa_source_output_disconnect(o);
  99
 100     if (o->resampler)
 101         pa_resampler_free(o->resampler);
 102
 103     pa_xfree(o->name);
 104     pa_xfree(o);
 105 }
 106
 107
 108 void pa_source_output_unref(struct pa_source_output* o) {
 109     assert(o && o->ref >= 1);
 110
 111     if (!(--o->ref))
 112         source_output_free(o);
 113 }
 114
 115 struct pa_source_output* pa_source_output_ref(struct pa_source_output *o) {
 116     assert(o && o->ref >= 1);
 117     o->ref++;
 118     return o;
 119 }
 120
 121
 122 void pa_source_output_kill(struct pa_source_output*o) {
 123     assert(o && o->ref >= 1);
 124
 125     if (o->kill)
 126         o->kill(o);
 127 }
 128
 129 void pa_source_output_push(struct pa_source_output *o, const struct pa_memchunk *chunk) {
 130     struct pa_memchunk rchunk;
 131     assert(o && chunk && chunk->length && o->push);
 132
 133     if (!o->resampler) {
 134         o->push(o, chunk);
 135         return;
 136     }
 137
 138     pa_resampler_run(o->resampler, chunk, &rchunk);
 139     if (!rchunk.length)
 140         return;
 141
 142     assert(rchunk.memblock);
 143     o->push(o, &rchunk);
 144     pa_memblock_unref(rchunk.memblock);
 145 }
 146
 147 void pa_source_output_set_name(struct pa_source_output *o, const char *name) {
 148     assert(o && o->ref >= 1);
 149     pa_xfree(o->name);
 150     o->name = pa_xstrdup(name);
 151
 152     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 153 }
 154
 155 pa_usec_t pa_source_output_get_latency(struct pa_source_output *o) {
 156     assert(o && o->ref >= 1);
 157
 158     if (o->get_latency)
 159         return o->get_latency(o);
 160
 161     return 0;
 162 }