code.delx.au - pulseaudio/blob - polyp/sink-input.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 "sink-input.h"
  32 #include "sample-util.h"
  33 #include "xmalloc.h"
  34 #include "subscribe.h"
  35 #include "log.h"
  36
  37 #define CONVERT_BUFFER_LENGTH 4096
  38
  39 struct pa_sink_input* pa_sink_input_new(struct pa_sink *s, const char *name, const struct pa_sample_spec *spec, int variable_rate) {
  40     struct pa_sink_input *i;
  41     struct pa_resampler *resampler = NULL;
  42     int r;
  43     char st[256];
  44     assert(s && spec && s->state == PA_SINK_RUNNING);
  45
  46     if (pa_idxset_ncontents(s->inputs) >= PA_MAX_INPUTS_PER_SINK) {
  47         pa_log(__FILE__": Failed to create sink input: too many inputs per sink.\n");
  48         return NULL;
  49     }
  50
  51     if (variable_rate || !pa_sample_spec_equal(spec, &s->sample_spec))
  52         if (!(resampler = pa_resampler_new(spec, &s->sample_spec, s->core->memblock_stat)))
  53             return NULL;
  54
  55     i = pa_xmalloc(sizeof(struct pa_sink_input));
  56     i->ref = 1;
  57     i->state = PA_SINK_INPUT_RUNNING;
  58     i->name = pa_xstrdup(name);
  59     i->client = NULL;
  60     i->owner = NULL;
  61     i->sink = s;
  62     i->sample_spec = *spec;
  63
  64     i->peek = NULL;
  65     i->drop = NULL;
  66     i->kill = NULL;
  67     i->get_latency = NULL;
  68     i->userdata = NULL;
  69
  70     i->corked = 0;
  71     i->volume = PA_VOLUME_NORM;
  72
  73     i->resampled_chunk.memblock = NULL;
  74     i->resampled_chunk.index = i->resampled_chunk.length = 0;
  75     i->resampler = resampler;
  76
  77     assert(s->core);
  78     r = pa_idxset_put(s->core->sink_inputs, i, &i->index);
  79     assert(r == 0 && i->index != PA_IDXSET_INVALID);
  80     r = pa_idxset_put(s->inputs, i, NULL);
  81     assert(r == 0);
  82
  83     pa_sample_spec_snprint(st, sizeof(st), spec);
  84     pa_log(__FILE__": created %u \"%s\" on %u with sample spec \"%s\"\n", i->index, i->name, s->index, st);
  85
  86     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
  87
  88     return i;
  89 }
  90
  91 void pa_sink_input_disconnect(struct pa_sink_input *i) {
  92     assert(i && i->state == PA_SINK_INPUT_RUNNING && i->sink && i->sink->core);
  93
  94     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
  95     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
  96
  97     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
  98     i->sink = NULL;
  99
 100     i->peek = NULL;
 101     i->drop = NULL;
 102     i->kill = NULL;
 103     i->get_latency = NULL;
 104
 105     i->state = PA_SINK_INPUT_DISCONNECTED;
 106 }
 107
 108 static void sink_input_free(struct pa_sink_input* i) {
 109     assert(i);
 110
 111     if (i->state != PA_SINK_INPUT_DISCONNECTED)
 112         pa_sink_input_disconnect(i);
 113
 114     if (i->resampled_chunk.memblock)
 115         pa_memblock_unref(i->resampled_chunk.memblock);
 116     if (i->resampler)
 117         pa_resampler_free(i->resampler);
 118
 119     pa_xfree(i->name);
 120     pa_xfree(i);
 121 }
 122
 123 void pa_sink_input_unref(struct pa_sink_input *i) {
 124     assert(i && i->ref >= 1);
 125
 126     if (!(--i->ref))
 127         sink_input_free(i);
 128 }
 129
 130 struct pa_sink_input* pa_sink_input_ref(struct pa_sink_input *i) {
 131     assert(i && i->ref >= 1);
 132     i->ref++;
 133     return i;
 134 }
 135
 136 void pa_sink_input_kill(struct pa_sink_input*i) {
 137     assert(i && i->ref >= 1);
 138
 139     if (i->kill)
 140         i->kill(i);
 141 }
 142
 143 pa_usec_t pa_sink_input_get_latency(struct pa_sink_input *i) {
 144     pa_usec_t r = 0;
 145     assert(i && i->ref >= 1);
 146
 147     if (i->get_latency)
 148         r += i->get_latency(i);
 149
 150     if (i->resampled_chunk.memblock)
 151         r += pa_bytes_to_usec(i->resampled_chunk.length, &i->sample_spec);
 152
 153     return r;
 154 }
 155
 156 int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
 157     int ret = 0;
 158     assert(i && chunk && i->ref >= 1);
 159
 160     if (!i->peek || !i->drop)
 161         return -1;
 162
 163     if (i->corked)
 164         return -1;
 165
 166     if (!i->resampler)
 167         return i->peek(i, chunk);
 168
 169     pa_sink_input_ref(i);
 170
 171     while (!i->resampled_chunk.memblock) {
 172         struct pa_memchunk tchunk;
 173         size_t l;
 174
 175         if ((ret = i->peek(i, &tchunk)) < 0)
 176             goto finish;
 177
 178         assert(tchunk.length);
 179
 180         l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
 181
 182         if (l > tchunk.length)
 183             l = tchunk.length;
 184
 185         i->drop(i, &tchunk, l);
 186         tchunk.length = l;
 187
 188         pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
 189         pa_memblock_unref(tchunk.memblock);
 190     }
 191
 192     assert(i->resampled_chunk.memblock && i->resampled_chunk.length);
 193     *chunk = i->resampled_chunk;
 194     pa_memblock_ref(i->resampled_chunk.memblock);
 195
 196     ret = 0;
 197
 198 finish:
 199
 200     pa_sink_input_unref(i);
 201
 202     return ret;
 203 }
 204
 205 void pa_sink_input_drop(struct pa_sink_input *i, const struct pa_memchunk *chunk, size_t length) {
 206     assert(i && length && i->ref >= 1);
 207
 208     if (!i->resampler) {
 209         if (i->drop)
 210             i->drop(i, chunk, length);
 211         return;
 212     }
 213
 214     assert(i->resampled_chunk.memblock && i->resampled_chunk.length >= length);
 215
 216     i->resampled_chunk.index += length;
 217     i->resampled_chunk.length -= length;
 218
 219     if (!i->resampled_chunk.length) {
 220         pa_memblock_unref(i->resampled_chunk.memblock);
 221         i->resampled_chunk.memblock = NULL;
 222         i->resampled_chunk.index = i->resampled_chunk.length = 0;
 223     }
 224 }
 225
 226 void pa_sink_input_set_volume(struct pa_sink_input *i, pa_volume_t volume) {
 227     assert(i && i->sink && i->sink->core && i->ref >= 1);
 228
 229     if (i->volume != volume) {
 230         i->volume = volume;
 231         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 232     }
 233 }
 234
 235 void pa_sink_input_cork(struct pa_sink_input *i, int b) {
 236     int n;
 237     assert(i && i->ref >= 1);
 238
 239     n = i->corked && !b;
 240     i->corked = b;
 241
 242     if (n)
 243         pa_sink_notify(i->sink);
 244 }
 245
 246 void pa_sink_input_set_rate(struct pa_sink_input *i, uint32_t rate) {
 247     assert(i && i->resampler && i->ref >= 1);
 248
 249     if (i->sample_spec.rate == rate)
 250         return;
 251
 252     i->sample_spec.rate = rate;
 253     pa_resampler_set_input_rate(i->resampler, rate);
 254 }
 255
 256 void pa_sink_input_set_name(struct pa_sink_input *i, const char *name) {
 257     assert(i && i->ref >= 1);
 258
 259     pa_xfree(i->name);
 260     i->name = pa_xstrdup(name);
 261 }