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     char st[256];
  41     assert(s && spec);
  42
  43     if (pa_idxset_ncontents(s->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
  44         pa_log(__FILE__": Failed to create source output: too many outputs per source.\n");
  45         return NULL;
  46     }
  47
  48     if (resample_method == PA_RESAMPLER_INVALID)
  49         resample_method = s->core->resample_method;
  50
  51     if (!pa_sample_spec_equal(&s->sample_spec, spec))
  52         if (!(resampler = pa_resampler_new(&s->sample_spec, spec, s->core->memblock_stat, resample_method)))
  53             return NULL;
  54
  55     o = pa_xmalloc(sizeof(struct pa_source_output));
  56     o->ref = 1;
  57     o->state = PA_SOURCE_OUTPUT_RUNNING;
  58     o->name = pa_xstrdup(name);
  59     o->client = NULL;
  60     o->owner = NULL;
  61     o->source = s;
  62     o->sample_spec = *spec;
  63
  64     o->push = NULL;
  65     o->kill = NULL;
  66     o->userdata = NULL;
  67     o->get_latency = NULL;
  68
  69     o->resampler = resampler;
  70
  71     assert(s->core);
  72     r = pa_idxset_put(s->core->source_outputs, o, &o->index);
  73     assert(r == 0 && o->index != PA_IDXSET_INVALID);
  74     r = pa_idxset_put(s->outputs, o, NULL);
  75     assert(r == 0);
  76
  77     pa_sample_spec_snprint(st, sizeof(st), spec);
  78     pa_log_info(__FILE__": created %u \"%s\" on %u with sample spec \"%s\"\n", o->index, o->name, s->index, st);
  79
  80     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
  81
  82     return o;
  83 }
  84
  85 void pa_source_output_disconnect(struct pa_source_output*o) {
  86     assert(o && o->state != PA_SOURCE_OUTPUT_DISCONNECTED && o->source && o->source->core);
  87
  88     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
  89     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
  90
  91     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
  92     o->source = NULL;
  93
  94     o->push = NULL;
  95     o->kill = NULL;
  96
  97
  98     o->state = PA_SOURCE_OUTPUT_DISCONNECTED;
  99 }
 100
 101 static void source_output_free(struct pa_source_output* o) {
 102     assert(o);
 103
 104     if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
 105         pa_source_output_disconnect(o);
 106
 107     pa_log_info(__FILE__": freed %u \"%s\"\n", o->index, o->name);
 108
 109     if (o->resampler)
 110         pa_resampler_free(o->resampler);
 111
 112     pa_xfree(o->name);
 113     pa_xfree(o);
 114 }
 115
 116
 117 void pa_source_output_unref(struct pa_source_output* o) {
 118     assert(o && o->ref >= 1);
 119
 120     if (!(--o->ref))
 121         source_output_free(o);
 122 }
 123
 124 struct pa_source_output* pa_source_output_ref(struct pa_source_output *o) {
 125     assert(o && o->ref >= 1);
 126     o->ref++;
 127     return o;
 128 }
 129
 130
 131 void pa_source_output_kill(struct pa_source_output*o) {
 132     assert(o && o->ref >= 1);
 133
 134     if (o->kill)
 135         o->kill(o);
 136 }
 137
 138 void pa_source_output_push(struct pa_source_output *o, const struct pa_memchunk *chunk) {
 139     struct pa_memchunk rchunk;
 140     assert(o && chunk && chunk->length && o->push);
 141
 142     if (o->state == PA_SOURCE_OUTPUT_CORKED)
 143         return;
 144
 145     if (!o->resampler) {
 146         o->push(o, chunk);
 147         return;
 148     }
 149
 150     pa_resampler_run(o->resampler, chunk, &rchunk);
 151     if (!rchunk.length)
 152         return;
 153
 154     assert(rchunk.memblock);
 155     o->push(o, &rchunk);
 156     pa_memblock_unref(rchunk.memblock);
 157 }
 158
 159 void pa_source_output_set_name(struct pa_source_output *o, const char *name) {
 160     assert(o && o->ref >= 1);
 161     pa_xfree(o->name);
 162     o->name = pa_xstrdup(name);
 163
 164     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 165 }
 166
 167 pa_usec_t pa_source_output_get_latency(struct pa_source_output *o) {
 168     assert(o && o->ref >= 1);
 169
 170     if (o->get_latency)
 171         return o->get_latency(o);
 172
 173     return 0;
 174 }
 175
 176 void pa_source_output_cork(struct pa_source_output *o, int b) {
 177     assert(o && o->ref >= 1);
 178
 179     if (o->state == PA_SOURCE_OUTPUT_DISCONNECTED)
 180         return;
 181
 182     o->state = b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 183 }
 184
 185 enum pa_resample_method pa_source_output_get_resample_method(struct pa_source_output *o) {
 186     assert(o && o->ref >= 1);
 187
 188     if (!o->resampler)
 189         return PA_RESAMPLER_INVALID;
 190
 191     return pa_resampler_get_method(o->resampler);
 192 }