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 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 "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, int resample_method) {
  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 (resample_method == PA_RESAMPLER_INVALID)
  52         resample_method = s->core->resample_method;
  53
  54     if (variable_rate || !pa_sample_spec_equal(spec, &s->sample_spec))
  55         if (!(resampler = pa_resampler_new(spec, &s->sample_spec, s->core->memblock_stat, resample_method)))
  56             return NULL;
  57
  58     i = pa_xmalloc(sizeof(struct pa_sink_input));
  59     i->ref = 1;
  60     i->state = PA_SINK_INPUT_RUNNING;
  61     i->name = pa_xstrdup(name);
  62     i->client = NULL;
  63     i->owner = NULL;
  64     i->sink = s;
  65     i->sample_spec = *spec;
  66
  67     i->peek = NULL;
  68     i->drop = NULL;
  69     i->kill = NULL;
  70     i->get_latency = NULL;
  71     i->userdata = NULL;
  72     i->underrun = NULL;
  73
  74     i->volume = PA_VOLUME_NORM;
  75     i->playing = 0;
  76
  77     i->resampled_chunk.memblock = NULL;
  78     i->resampled_chunk.index = i->resampled_chunk.length = 0;
  79     i->resampler = resampler;
  80
  81     assert(s->core);
  82     r = pa_idxset_put(s->core->sink_inputs, i, &i->index);
  83     assert(r == 0 && i->index != PA_IDXSET_INVALID);
  84     r = pa_idxset_put(s->inputs, i, NULL);
  85     assert(r == 0);
  86
  87     pa_sample_spec_snprint(st, sizeof(st), spec);
  88     pa_log_info(__FILE__": created %u \"%s\" on %u with sample spec \"%s\"\n", i->index, i->name, s->index, st);
  89
  90     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
  91
  92     return i;
  93 }
  94
  95 void pa_sink_input_disconnect(struct pa_sink_input *i) {
  96     assert(i && i->state != PA_SINK_INPUT_DISCONNECTED && i->sink && i->sink->core);
  97
  98     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
  99     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
 100
 101     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 102     i->sink = NULL;
 103
 104     i->peek = NULL;
 105     i->drop = NULL;
 106     i->kill = NULL;
 107     i->get_latency = NULL;
 108
 109     i->state = PA_SINK_INPUT_DISCONNECTED;
 110 }
 111
 112 static void sink_input_free(struct pa_sink_input* i) {
 113     assert(i);
 114
 115     if (i->state != PA_SINK_INPUT_DISCONNECTED)
 116         pa_sink_input_disconnect(i);
 117
 118     pa_log_info(__FILE__": freed %u \"%s\"\n", i->index, i->name);
 119
 120     if (i->resampled_chunk.memblock)
 121         pa_memblock_unref(i->resampled_chunk.memblock);
 122     if (i->resampler)
 123         pa_resampler_free(i->resampler);
 124
 125     pa_xfree(i->name);
 126     pa_xfree(i);
 127 }
 128
 129 void pa_sink_input_unref(struct pa_sink_input *i) {
 130     assert(i && i->ref >= 1);
 131
 132     if (!(--i->ref))
 133         sink_input_free(i);
 134 }
 135
 136 struct pa_sink_input* pa_sink_input_ref(struct pa_sink_input *i) {
 137     assert(i && i->ref >= 1);
 138     i->ref++;
 139     return i;
 140 }
 141
 142 void pa_sink_input_kill(struct pa_sink_input*i) {
 143     assert(i && i->ref >= 1);
 144
 145     if (i->kill)
 146         i->kill(i);
 147 }
 148
 149 pa_usec_t pa_sink_input_get_latency(struct pa_sink_input *i) {
 150     pa_usec_t r = 0;
 151     assert(i && i->ref >= 1);
 152
 153     if (i->get_latency)
 154         r += i->get_latency(i);
 155
 156     if (i->resampled_chunk.memblock)
 157         r += pa_bytes_to_usec(i->resampled_chunk.length, &i->sample_spec);
 158
 159     return r;
 160 }
 161
 162 int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
 163     int ret = -1;
 164     assert(i && chunk && i->ref >= 1);
 165
 166     pa_sink_input_ref(i);
 167
 168     if (!i->peek || !i->drop || i->state == PA_SINK_INPUT_CORKED)
 169         goto finish;
 170
 171     if (!i->resampler) {
 172         ret = i->peek(i, chunk);
 173         goto finish;
 174     }
 175
 176     while (!i->resampled_chunk.memblock) {
 177         struct pa_memchunk tchunk;
 178         size_t l;
 179
 180         if ((ret = i->peek(i, &tchunk)) < 0)
 181             goto finish;
 182
 183         assert(tchunk.length);
 184
 185         l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
 186
 187         if (l > tchunk.length)
 188             l = tchunk.length;
 189
 190         i->drop(i, &tchunk, l);
 191         tchunk.length = l;
 192
 193         pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
 194         pa_memblock_unref(tchunk.memblock);
 195     }
 196
 197     assert(i->resampled_chunk.memblock && i->resampled_chunk.length);
 198     *chunk = i->resampled_chunk;
 199     pa_memblock_ref(i->resampled_chunk.memblock);
 200
 201     ret = 0;
 202
 203 finish:
 204
 205     if (ret < 0 && i->playing && i->underrun)
 206         i->underrun(i);
 207
 208     i->playing = ret >= 0;
 209
 210     pa_sink_input_unref(i);
 211
 212     return ret;
 213 }
 214
 215 void pa_sink_input_drop(struct pa_sink_input *i, const struct pa_memchunk *chunk, size_t length) {
 216     assert(i && length && i->ref >= 1);
 217
 218     if (!i->resampler) {
 219         if (i->drop)
 220             i->drop(i, chunk, length);
 221         return;
 222     }
 223
 224     assert(i->resampled_chunk.memblock && i->resampled_chunk.length >= length);
 225
 226     i->resampled_chunk.index += length;
 227     i->resampled_chunk.length -= length;
 228
 229     if (!i->resampled_chunk.length) {
 230         pa_memblock_unref(i->resampled_chunk.memblock);
 231         i->resampled_chunk.memblock = NULL;
 232         i->resampled_chunk.index = i->resampled_chunk.length = 0;
 233     }
 234 }
 235
 236 void pa_sink_input_set_volume(struct pa_sink_input *i, pa_volume_t volume) {
 237     assert(i && i->sink && i->sink->core && i->ref >= 1);
 238
 239     if (i->volume != volume) {
 240         i->volume = volume;
 241         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 242     }
 243 }
 244
 245 void pa_sink_input_cork(struct pa_sink_input *i, int b) {
 246     int n;
 247     assert(i && i->ref >= 1);
 248
 249     if (i->state == PA_SINK_INPUT_DISCONNECTED)
 250         return;
 251
 252     n = i->state == PA_SINK_INPUT_CORKED && !b;
 253     i->state = b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
 254
 255     if (n)
 256         pa_sink_notify(i->sink);
 257 }
 258
 259 void pa_sink_input_set_rate(struct pa_sink_input *i, uint32_t rate) {
 260     assert(i && i->resampler && i->ref >= 1);
 261
 262     if (i->sample_spec.rate == rate)
 263         return;
 264
 265     i->sample_spec.rate = rate;
 266     pa_resampler_set_input_rate(i->resampler, rate);
 267 }
 268
 269 void pa_sink_input_set_name(struct pa_sink_input *i, const char *name) {
 270     assert(i && i->ref >= 1);
 271
 272     pa_xfree(i->name);
 273     i->name = pa_xstrdup(name);
 274
 275     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 276 }
 277
 278 enum pa_resample_method pa_sink_input_get_resample_method(struct pa_sink_input *i) {
 279     assert(i && i->ref >= 1);
 280
 281     if (!i->resampler)
 282         return PA_RESAMPLER_INVALID;
 283
 284     return pa_resampler_get_method(i->resampler);
 285 }