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 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   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 Lesser 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, int resample_method) {
  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 (resample_method < 0)
  48         resample_method = s->core->resample_method;
  49
  50     if (!pa_sample_spec_equal(&s->sample_spec, spec))
  51         if (!(resampler = pa_resampler_new(&s->sample_spec, spec, s->core->memblock_stat, resample_method)))
  52             return NULL;
  53
  54     o = pa_xmalloc(sizeof(struct pa_source_output));
  55     o->ref = 1;
  56     o->state = PA_SOURCE_OUTPUT_RUNNING;
  57     o->name = pa_xstrdup(name);
  58     o->client = NULL;
  59     o->owner = NULL;
  60     o->source = s;
  61     o->sample_spec = *spec;
  62
  63     o->push = NULL;
  64     o->kill = NULL;
  65     o->userdata = NULL;
  66     o->get_latency = NULL;
  67
  68     o->resampler = resampler;
  69
  70     assert(s->core);
  71     r = pa_idxset_put(s->core->source_outputs, o, &o->index);
  72     assert(r == 0 && o->index != PA_IDXSET_INVALID);
  73     r = pa_idxset_put(s->outputs, o, NULL);
  74     assert(r == 0);
  75
  76     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
  77
  78     return o;
  79 }
  80
  81 void pa_source_output_disconnect(struct pa_source_output*o) {
  82     assert(o && o->state != PA_SOURCE_OUTPUT_DISCONNECTED && o->source && o->source->core);
  83
  84     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
  85     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
  86
  87     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
  88     o->source = NULL;
  89
  90     o->push = NULL;
  91     o->kill = NULL;
  92
  93
  94     o->state = PA_SOURCE_OUTPUT_DISCONNECTED;
  95 }
  96
  97 static void source_output_free(struct pa_source_output* o) {
  98     assert(o);
  99
 100     if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
 101         pa_source_output_disconnect(o);
 102
 103     if (o->resampler)
 104         pa_resampler_free(o->resampler);
 105
 106     pa_xfree(o->name);
 107     pa_xfree(o);
 108 }
 109
 110
 111 void pa_source_output_unref(struct pa_source_output* o) {
 112     assert(o && o->ref >= 1);
 113
 114     if (!(--o->ref))
 115         source_output_free(o);
 116 }
 117
 118 struct pa_source_output* pa_source_output_ref(struct pa_source_output *o) {
 119     assert(o && o->ref >= 1);
 120     o->ref++;
 121     return o;
 122 }
 123
 124
 125 void pa_source_output_kill(struct pa_source_output*o) {
 126     assert(o && o->ref >= 1);
 127
 128     if (o->kill)
 129         o->kill(o);
 130 }
 131
 132 void pa_source_output_push(struct pa_source_output *o, const struct pa_memchunk *chunk) {
 133     struct pa_memchunk rchunk;
 134     assert(o && chunk && chunk->length && o->push);
 135
 136     if (o->state == PA_SOURCE_OUTPUT_CORKED)
 137         return;
 138
 139     if (!o->resampler) {
 140         o->push(o, chunk);
 141         return;
 142     }
 143
 144     pa_resampler_run(o->resampler, chunk, &rchunk);
 145     if (!rchunk.length)
 146         return;
 147
 148     assert(rchunk.memblock);
 149     o->push(o, &rchunk);
 150     pa_memblock_unref(rchunk.memblock);
 151 }
 152
 153 void pa_source_output_set_name(struct pa_source_output *o, const char *name) {
 154     assert(o && o->ref >= 1);
 155     pa_xfree(o->name);
 156     o->name = pa_xstrdup(name);
 157
 158     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 159 }
 160
 161 pa_usec_t pa_source_output_get_latency(struct pa_source_output *o) {
 162     assert(o && o->ref >= 1);
 163
 164     if (o->get_latency)
 165         return o->get_latency(o);
 166
 167     return 0;
 168 }
 169
 170 void pa_source_output_cork(struct pa_source_output *o, int b) {
 171     assert(o && o->ref >= 1);
 172
 173     if (o->state == PA_SOURCE_OUTPUT_DISCONNECTED)
 174         return;
 175
 176     o->state = b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 177 }