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