code.delx.au - pulseaudio/blob - src/pulsecore/source-output.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio 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   PulseAudio 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 PulseAudio; 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 <pulse/utf8.h>
  32 #include <pulse/xmalloc.h>
  33
  34 #include <pulsecore/core-subscribe.h>
  35 #include <pulsecore/log.h>
  36
  37 #include "source-output.h"
  38
  39 #define CHECK_VALIDITY_RETURN_NULL(condition) \
  40 do {\
  41 if (!(condition)) \
  42     return NULL; \
  43 } while (0)
  44
  45 pa_source_output* pa_source_output_new(
  46         pa_source *s,
  47         const char *driver,
  48         const char *name,
  49         const pa_sample_spec *spec,
  50         const pa_channel_map *map,
  51         int resample_method) {
  52
  53     pa_source_output *o;
  54     pa_resampler *resampler = NULL;
  55     int r;
  56     char st[256];
  57     pa_channel_map tmap;
  58
  59     assert(s);
  60     assert(spec);
  61     assert(s->state == PA_SOURCE_RUNNING);
  62
  63     CHECK_VALIDITY_RETURN_NULL(pa_sample_spec_valid(spec));
  64
  65     if (!map)
  66         map = pa_channel_map_init_auto(&tmap, spec->channels, PA_CHANNEL_MAP_DEFAULT);
  67
  68     CHECK_VALIDITY_RETURN_NULL(map && pa_channel_map_valid(map));
  69     CHECK_VALIDITY_RETURN_NULL(map->channels == spec->channels);
  70     CHECK_VALIDITY_RETURN_NULL(!driver || pa_utf8_valid(driver));
  71     CHECK_VALIDITY_RETURN_NULL(pa_utf8_valid(name));
  72
  73     if (pa_idxset_size(s->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
  74         pa_log(__FILE__": Failed to create source output: too many outputs per source.");
  75         return NULL;
  76     }
  77
  78     if (resample_method == PA_RESAMPLER_INVALID)
  79         resample_method = s->core->resample_method;
  80
  81     if (!pa_sample_spec_equal(&s->sample_spec, spec) || !pa_channel_map_equal(&s->channel_map, map))
  82         if (!(resampler = pa_resampler_new(&s->sample_spec, &s->channel_map, spec, map, s->core->memblock_stat, resample_method)))
  83             return NULL;
  84
  85     o = pa_xnew(pa_source_output, 1);
  86     o->ref = 1;
  87     o->state = PA_SOURCE_OUTPUT_RUNNING;
  88     o->name = pa_xstrdup(name);
  89     o->driver = pa_xstrdup(driver);
  90     o->owner = NULL;
  91     o->source = s;
  92     o->client = NULL;
  93
  94     o->sample_spec = *spec;
  95     o->channel_map = *map;
  96
  97     o->push = NULL;
  98     o->kill = NULL;
  99     o->get_latency = NULL;
 100     o->userdata = NULL;
 101
 102     o->resampler = resampler;
 103
 104     assert(s->core);
 105     r = pa_idxset_put(s->core->source_outputs, o, &o->index);
 106     assert(r == 0 && o->index != PA_IDXSET_INVALID);
 107     r = pa_idxset_put(s->outputs, o, NULL);
 108     assert(r == 0);
 109
 110     pa_sample_spec_snprint(st, sizeof(st), spec);
 111     pa_log_info(__FILE__": created %u \"%s\" on %u with sample spec \"%s\"", o->index, o->name, s->index, st);
 112
 113     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 114
 115     return o;
 116 }
 117
 118 void pa_source_output_disconnect(pa_source_output*o) {
 119     assert(o);
 120     assert(o->state != PA_SOURCE_OUTPUT_DISCONNECTED);
 121     assert(o->source);
 122     assert(o->source->core);
 123
 124     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 125     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
 126
 127     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 128     o->source = NULL;
 129
 130     o->push = NULL;
 131     o->kill = NULL;
 132     o->get_latency = NULL;
 133
 134     o->state = PA_SOURCE_OUTPUT_DISCONNECTED;
 135 }
 136
 137 static void source_output_free(pa_source_output* o) {
 138     assert(o);
 139
 140     if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
 141         pa_source_output_disconnect(o);
 142
 143     pa_log_info(__FILE__": freed %u \"%s\"", o->index, o->name);
 144
 145     if (o->resampler)
 146         pa_resampler_free(o->resampler);
 147
 148     pa_xfree(o->name);
 149     pa_xfree(o->driver);
 150     pa_xfree(o);
 151 }
 152
 153 void pa_source_output_unref(pa_source_output* o) {
 154     assert(o);
 155     assert(o->ref >= 1);
 156
 157     if (!(--o->ref))
 158         source_output_free(o);
 159 }
 160
 161 pa_source_output* pa_source_output_ref(pa_source_output *o) {
 162     assert(o);
 163     assert(o->ref >= 1);
 164
 165     o->ref++;
 166     return o;
 167 }
 168
 169
 170 void pa_source_output_kill(pa_source_output*o) {
 171     assert(o);
 172     assert(o->ref >= 1);
 173
 174     if (o->kill)
 175         o->kill(o);
 176 }
 177
 178 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 179     pa_memchunk rchunk;
 180
 181     assert(o);
 182     assert(chunk);
 183     assert(chunk->length);
 184     assert(o->push);
 185
 186     if (o->state == PA_SOURCE_OUTPUT_CORKED)
 187         return;
 188
 189     if (!o->resampler) {
 190         o->push(o, chunk);
 191         return;
 192     }
 193
 194     pa_resampler_run(o->resampler, chunk, &rchunk);
 195     if (!rchunk.length)
 196         return;
 197
 198     assert(rchunk.memblock);
 199     o->push(o, &rchunk);
 200     pa_memblock_unref(rchunk.memblock);
 201 }
 202
 203 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 204     assert(o);
 205     assert(o->ref >= 1);
 206
 207     pa_xfree(o->name);
 208     o->name = pa_xstrdup(name);
 209
 210     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 211 }
 212
 213 pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
 214     assert(o);
 215     assert(o->ref >= 1);
 216
 217     if (o->get_latency)
 218         return o->get_latency(o);
 219
 220     return 0;
 221 }
 222
 223 void pa_source_output_cork(pa_source_output *o, int b) {
 224     assert(o);
 225     assert(o->ref >= 1);
 226
 227     if (o->state == PA_SOURCE_OUTPUT_DISCONNECTED)
 228         return;
 229
 230     o->state = b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 231 }
 232
 233 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 234     assert(o);
 235     assert(o->ref >= 1);
 236
 237     if (!o->resampler)
 238         return PA_RESAMPLER_INVALID;
 239
 240     return pa_resampler_get_method(o->resampler);
 241 }