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(
  37     struct pa_source *s,
  38     const char *name,
  39     const char *driver,
  40     const struct pa_sample_spec *spec,
  41     const struct pa_channel_map *map,
  42     int resample_method) {
  43
  44     struct pa_source_output *o;
  45     struct pa_resampler *resampler = NULL;
  46     int r;
  47     char st[256];
  48     assert(s && spec);
  49
  50     if (pa_idxset_ncontents(s->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
  51         pa_log(__FILE__": Failed to create source output: too many outputs per source.\n");
  52         return NULL;
  53     }
  54
  55     if (resample_method == PA_RESAMPLER_INVALID)
  56         resample_method = s->core->resample_method;
  57
  58     if (!pa_sample_spec_equal(&s->sample_spec, spec))
  59         if (!(resampler = pa_resampler_new(&s->sample_spec, &s->channel_map, spec, map, s->core->memblock_stat, resample_method)))
  60             return NULL;
  61
  62     o = pa_xmalloc(sizeof(struct pa_source_output));
  63     o->ref = 1;
  64     o->state = PA_SOURCE_OUTPUT_RUNNING;
  65     o->name = pa_xstrdup(name);
  66     o->driver = pa_xstrdup(driver);
  67
  68     o->client = NULL;
  69     o->owner = NULL;
  70     o->source = s;
  71
  72     o->sample_spec = *spec;
  73     if (map)
  74         c->channel_map = *map;
  75     else
  76         pa_channel_map_init_auto(&c->channel_map, spec->channels);
  77
  78     o->push = NULL;
  79     o->kill = NULL;
  80     o->userdata = NULL;
  81     o->get_latency = NULL;
  82
  83     o->resampler = resampler;
  84
  85     assert(s->core);
  86     r = pa_idxset_put(s->core->source_outputs, o, &o->index);
  87     assert(r == 0 && o->index != PA_IDXSET_INVALID);
  88     r = pa_idxset_put(s->outputs, o, NULL);
  89     assert(r == 0);
  90
  91     pa_sample_spec_snprint(st, sizeof(st), spec);
  92     pa_log_info(__FILE__": created %u \"%s\" on %u with sample spec \"%s\"\n", o->index, o->name, s->index, st);
  93
  94     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
  95
  96     return o;
  97 }
  98
  99 void pa_source_output_disconnect(struct pa_source_output*o) {
 100     assert(o && o->state != PA_SOURCE_OUTPUT_DISCONNECTED && o->source && o->source->core);
 101
 102     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 103     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
 104
 105     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 106     o->source = NULL;
 107
 108     o->push = NULL;
 109     o->kill = NULL;
 110
 111     o->state = PA_SOURCE_OUTPUT_DISCONNECTED;
 112 }
 113
 114 static void source_output_free(struct pa_source_output* o) {
 115     assert(o);
 116
 117     if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
 118         pa_source_output_disconnect(o);
 119
 120     pa_log_info(__FILE__": freed %u \"%s\"\n", o->index, o->name);
 121
 122     if (o->resampler)
 123         pa_resampler_free(o->resampler);
 124
 125     pa_xfree(o->name);
 126     pa_xfree(o->driver);
 127     pa_xfree(o);
 128 }
 129
 130
 131 void pa_source_output_unref(struct pa_source_output* o) {
 132     assert(o && o->ref >= 1);
 133
 134     if (!(--o->ref))
 135         source_output_free(o);
 136 }
 137
 138 struct pa_source_output* pa_source_output_ref(struct pa_source_output *o) {
 139     assert(o && o->ref >= 1);
 140     o->ref++;
 141     return o;
 142 }
 143
 144
 145 void pa_source_output_kill(struct pa_source_output*o) {
 146     assert(o && o->ref >= 1);
 147
 148     if (o->kill)
 149         o->kill(o);
 150 }
 151
 152 void pa_source_output_push(struct pa_source_output *o, const struct pa_memchunk *chunk) {
 153     struct pa_memchunk rchunk;
 154     assert(o && chunk && chunk->length && o->push);
 155
 156     if (o->state == PA_SOURCE_OUTPUT_CORKED)
 157         return;
 158
 159     if (!o->resampler) {
 160         o->push(o, chunk);
 161         return;
 162     }
 163
 164     pa_resampler_run(o->resampler, chunk, &rchunk);
 165     if (!rchunk.length)
 166         return;
 167
 168     assert(rchunk.memblock);
 169     o->push(o, &rchunk);
 170     pa_memblock_unref(rchunk.memblock);
 171 }
 172
 173 void pa_source_output_set_name(struct pa_source_output *o, const char *name) {
 174     assert(o && o->ref >= 1);
 175     pa_xfree(o->name);
 176     o->name = pa_xstrdup(name);
 177
 178     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 179 }
 180
 181 pa_usec_t pa_source_output_get_latency(struct pa_source_output *o) {
 182     assert(o && o->ref >= 1);
 183
 184     if (o->get_latency)
 185         return o->get_latency(o);
 186
 187     return 0;
 188 }
 189
 190 void pa_source_output_cork(struct pa_source_output *o, int b) {
 191     assert(o && o->ref >= 1);
 192
 193     if (o->state == PA_SOURCE_OUTPUT_DISCONNECTED)
 194         return;
 195
 196     o->state = b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 197 }
 198
 199 enum pa_resample_method pa_source_output_get_resample_method(struct pa_source_output *o) {
 200     assert(o && o->ref >= 1);
 201
 202     if (!o->resampler)
 203         return PA_RESAMPLER_INVALID;
 204
 205     return pa_resampler_get_method(o->resampler);
 206 }