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, 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 < 0)
  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(__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     if (i->resampled_chunk.memblock)
 119         pa_memblock_unref(i->resampled_chunk.memblock);
 120     if (i->resampler)
 121         pa_resampler_free(i->resampler);
 122
 123     pa_xfree(i->name);
 124     pa_xfree(i);
 125 }
 126
 127 void pa_sink_input_unref(struct pa_sink_input *i) {
 128     assert(i && i->ref >= 1);
 129
 130     if (!(--i->ref))
 131         sink_input_free(i);
 132 }
 133
 134 struct pa_sink_input* pa_sink_input_ref(struct pa_sink_input *i) {
 135     assert(i && i->ref >= 1);
 136     i->ref++;
 137     return i;
 138 }
 139
 140 void pa_sink_input_kill(struct pa_sink_input*i) {
 141     assert(i && i->ref >= 1);
 142
 143     if (i->kill)
 144         i->kill(i);
 145 }
 146
 147 pa_usec_t pa_sink_input_get_latency(struct pa_sink_input *i) {
 148     pa_usec_t r = 0;
 149     assert(i && i->ref >= 1);
 150
 151     if (i->get_latency)
 152         r += i->get_latency(i);
 153
 154     if (i->resampled_chunk.memblock)
 155         r += pa_bytes_to_usec(i->resampled_chunk.length, &i->sample_spec);
 156
 157     return r;
 158 }
 159
 160 int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
 161     int ret = -1;
 162     assert(i && chunk && i->ref >= 1);
 163
 164     pa_sink_input_ref(i);
 165
 166     if (!i->peek || !i->drop || i->state == PA_SINK_INPUT_CORKED)
 167         goto finish;
 168
 169     if (!i->resampler) {
 170         ret = i->peek(i, chunk);
 171         goto finish;
 172     }
 173
 174     while (!i->resampled_chunk.memblock) {
 175         struct pa_memchunk tchunk;
 176         size_t l;
 177
 178         if ((ret = i->peek(i, &tchunk)) < 0)
 179             goto finish;
 180
 181         assert(tchunk.length);
 182
 183         l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
 184
 185         if (l > tchunk.length)
 186             l = tchunk.length;
 187
 188         i->drop(i, &tchunk, l);
 189         tchunk.length = l;
 190
 191         pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
 192         pa_memblock_unref(tchunk.memblock);
 193     }
 194
 195     assert(i->resampled_chunk.memblock && i->resampled_chunk.length);
 196     *chunk = i->resampled_chunk;
 197     pa_memblock_ref(i->resampled_chunk.memblock);
 198
 199     ret = 0;
 200
 201 finish:
 202
 203     if (ret < 0 && i->playing && i->underrun)
 204         i->underrun(i);
 205
 206     i->playing = ret >= 0;
 207
 208     pa_sink_input_unref(i);
 209
 210     return ret;
 211 }
 212
 213 void pa_sink_input_drop(struct pa_sink_input *i, const struct pa_memchunk *chunk, size_t length) {
 214     assert(i && length && i->ref >= 1);
 215
 216     if (!i->resampler) {
 217         if (i->drop)
 218             i->drop(i, chunk, length);
 219         return;
 220     }
 221
 222     assert(i->resampled_chunk.memblock && i->resampled_chunk.length >= length);
 223
 224     i->resampled_chunk.index += length;
 225     i->resampled_chunk.length -= length;
 226
 227     if (!i->resampled_chunk.length) {
 228         pa_memblock_unref(i->resampled_chunk.memblock);
 229         i->resampled_chunk.memblock = NULL;
 230         i->resampled_chunk.index = i->resampled_chunk.length = 0;
 231     }
 232 }
 233
 234 void pa_sink_input_set_volume(struct pa_sink_input *i, pa_volume_t volume) {
 235     assert(i && i->sink && i->sink->core && i->ref >= 1);
 236
 237     if (i->volume != volume) {
 238         i->volume = volume;
 239         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 240     }
 241 }
 242
 243 void pa_sink_input_cork(struct pa_sink_input *i, int b) {
 244     int n;
 245     assert(i && i->ref >= 1);
 246
 247     if (i->state == PA_SINK_INPUT_DISCONNECTED)
 248         return;
 249
 250     n = i->state == PA_SINK_INPUT_CORKED && !b;
 251     i->state = b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
 252
 253     if (n)
 254         pa_sink_notify(i->sink);
 255 }
 256
 257 void pa_sink_input_set_rate(struct pa_sink_input *i, uint32_t rate) {
 258     assert(i && i->resampler && i->ref >= 1);
 259
 260     if (i->sample_spec.rate == rate)
 261         return;
 262
 263     i->sample_spec.rate = rate;
 264     pa_resampler_set_input_rate(i->resampler, rate);
 265 }
 266
 267 void pa_sink_input_set_name(struct pa_sink_input *i, const char *name) {
 268     assert(i && i->ref >= 1);
 269
 270     pa_xfree(i->name);
 271     i->name = pa_xstrdup(name);
 272
 273     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 274 }