code.delx.au - pulseaudio/blob - polyp/sink.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 <stdlib.h>
  27 #include <assert.h>
  28 #include <string.h>
  29 #include <stdio.h>
  30
  31 #include "sink.h"
  32 #include "sink-input.h"
  33 #include "namereg.h"
  34 #include "util.h"
  35 #include "sample-util.h"
  36 #include "xmalloc.h"
  37 #include "subscribe.h"
  38
  39 #define MAX_MIX_CHANNELS 32
  40
  41 struct pa_sink* pa_sink_new(struct pa_core *core, const char *name, int fail, const struct pa_sample_spec *spec) {
  42     struct pa_sink *s;
  43     char *n = NULL;
  44     char st[256];
  45     int r;
  46     assert(core && name && *name && spec);
  47
  48     s = pa_xmalloc(sizeof(struct pa_sink));
  49
  50     if (!(name = pa_namereg_register(core, name, PA_NAMEREG_SINK, s, fail))) {
  51         pa_xfree(s);
  52         return NULL;
  53     }
  54
  55     s->name = pa_xstrdup(name);
  56     s->description = NULL;
  57
  58     s->owner = NULL;
  59     s->core = core;
  60     s->sample_spec = *spec;
  61     s->inputs = pa_idxset_new(NULL, NULL);
  62
  63     n = pa_sprintf_malloc("%s_monitor", name);
  64     s->monitor_source = pa_source_new(core, n, 0, spec);
  65     assert(s->monitor_source);
  66     pa_xfree(n);
  67     s->monitor_source->monitor_of = s;
  68     s->monitor_source->description = pa_sprintf_malloc("Monitor source of sink '%s'", s->name);
  69
  70     s->volume = PA_VOLUME_NORM;
  71
  72     s->notify = NULL;
  73     s->get_latency = NULL;
  74     s->userdata = NULL;
  75
  76     r = pa_idxset_put(core->sinks, s, &s->index);
  77     assert(s->index != PA_IDXSET_INVALID && r >= 0);
  78
  79     pa_sample_snprint(st, sizeof(st), spec);
  80     fprintf(stderr, "sink: created %u \"%s\" with sample spec \"%s\"\n", s->index, s->name, st);
  81
  82     pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_NEW, s->index);
  83
  84     return s;
  85 }
  86
  87 void pa_sink_free(struct pa_sink *s) {
  88     struct pa_sink_input *i, *j = NULL;
  89     assert(s);
  90
  91     pa_namereg_unregister(s->core, s->name);
  92
  93     while ((i = pa_idxset_first(s->inputs, NULL))) {
  94         assert(i != j);
  95         pa_sink_input_kill(i);
  96         j = i;
  97     }
  98     pa_idxset_free(s->inputs, NULL, NULL);
  99
 100     pa_source_free(s->monitor_source);
 101     pa_idxset_remove_by_data(s->core->sinks, s, NULL);
 102
 103     fprintf(stderr, "sink: freed %u \"%s\"\n", s->index, s->name);
 104
 105     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 106
 107     pa_xfree(s->name);
 108     pa_xfree(s->description);
 109     pa_xfree(s);
 110 }
 111
 112 void pa_sink_notify(struct pa_sink*s) {
 113     assert(s);
 114
 115     if (s->notify)
 116         s->notify(s);
 117 }
 118
 119 static unsigned fill_mix_info(struct pa_sink *s, struct pa_mix_info *info, unsigned maxinfo) {
 120     uint32_t index = PA_IDXSET_INVALID;
 121     struct pa_sink_input *i;
 122     unsigned n = 0;
 123
 124     assert(s && info);
 125
 126     for (i = pa_idxset_first(s->inputs, &index); maxinfo > 0 && i; i = pa_idxset_next(s->inputs, &index)) {
 127         if (pa_sink_input_peek(i, &info->chunk) < 0)
 128             continue;
 129
 130         info->volume = i->volume;
 131
 132         assert(info->chunk.memblock && info->chunk.memblock->data && info->chunk.length);
 133         info->userdata = i;
 134
 135         info++;
 136         maxinfo--;
 137         n++;
 138     }
 139
 140     return n;
 141 }
 142
 143 static void inputs_drop(struct pa_sink *s, struct pa_mix_info *info, unsigned maxinfo, size_t length) {
 144     assert(s && info);
 145
 146     for (; maxinfo > 0; maxinfo--, info++) {
 147         struct pa_sink_input *i = info->userdata;
 148         assert(i && info->chunk.memblock);
 149
 150         pa_memblock_unref(info->chunk.memblock);
 151         pa_sink_input_drop(i, length);
 152     }
 153 }
 154
 155 int pa_sink_render(struct pa_sink*s, size_t length, struct pa_memchunk *result) {
 156     struct pa_mix_info info[MAX_MIX_CHANNELS];
 157     unsigned n;
 158     size_t l;
 159     assert(s && length && result);
 160
 161     n = fill_mix_info(s, info, MAX_MIX_CHANNELS);
 162
 163     if (n <= 0)
 164         return -1;
 165
 166     if (n == 1) {
 167         uint32_t volume = PA_VOLUME_NORM;
 168         struct pa_sink_input *i = info[0].userdata;
 169         assert(i);
 170         *result = info[0].chunk;
 171         pa_memblock_ref(result->memblock);
 172
 173         if (result->length > length)
 174             result->length = length;
 175
 176         l = result->length;
 177
 178         if (s->volume != PA_VOLUME_NORM || info[0].volume != PA_VOLUME_NORM)
 179             volume = pa_volume_multiply(s->volume, info[0].volume);
 180
 181         if (volume != PA_VOLUME_NORM) {
 182             pa_memchunk_make_writable(result);
 183             pa_volume_memchunk(result, &s->sample_spec, volume);
 184         }
 185     } else {
 186         result->memblock = pa_memblock_new(length);
 187         assert(result->memblock);
 188
 189         result->length = l = pa_mix(info, n, result->memblock->data, length, &s->sample_spec, s->volume);
 190         result->index = 0;
 191
 192         assert(l);
 193     }
 194
 195     inputs_drop(s, info, n, l);
 196
 197     assert(s->monitor_source);
 198     pa_source_post(s->monitor_source, result);
 199
 200     return 0;
 201 }
 202
 203 int pa_sink_render_into(struct pa_sink*s, struct pa_memchunk *target) {
 204     struct pa_mix_info info[MAX_MIX_CHANNELS];
 205     unsigned n;
 206     size_t l;
 207     assert(s && target && target->length && target->memblock && target->memblock->data);
 208
 209     n = fill_mix_info(s, info, MAX_MIX_CHANNELS);
 210
 211     if (n <= 0)
 212         return -1;
 213
 214     if (n == 1) {
 215         uint32_t volume = PA_VOLUME_NORM;
 216         struct pa_sink_info *i = info[0].userdata;
 217         assert(i);
 218
 219         l = target->length;
 220         if (l > info[0].chunk.length)
 221             l = info[0].chunk.length;
 222
 223         memcpy(target->memblock->data+target->index, info[0].chunk.memblock->data + info[0].chunk.index, l);
 224         target->length = l;
 225
 226         if (s->volume != PA_VOLUME_NORM || info[0].volume != PA_VOLUME_NORM)
 227             volume = pa_volume_multiply(s->volume, info[0].volume);
 228
 229         if (volume != PA_VOLUME_NORM)
 230             pa_volume_memchunk(target, &s->sample_spec, volume);
 231     } else
 232         target->length = l = pa_mix(info, n, target->memblock->data+target->index, target->length, &s->sample_spec, s->volume);
 233
 234     assert(l);
 235     inputs_drop(s, info, n, l);
 236
 237     assert(s->monitor_source);
 238     pa_source_post(s->monitor_source, target);
 239
 240     return 0;
 241 }
 242
 243 void pa_sink_render_into_full(struct pa_sink *s, struct pa_memchunk *target) {
 244     struct pa_memchunk chunk;
 245     size_t l, d;
 246     assert(s && target && target->memblock && target->length && target->memblock->data);
 247
 248     l = target->length;
 249     d = 0;
 250     while (l > 0) {
 251         chunk = *target;
 252         chunk.index += d;
 253         chunk.length -= d;
 254
 255         if (pa_sink_render_into(s, &chunk) < 0)
 256             break;
 257
 258         d += chunk.length;
 259         l -= chunk.length;
 260     }
 261
 262     if (l > 0) {
 263         chunk = *target;
 264         chunk.index += d;
 265         chunk.length -= d;
 266         pa_silence_memchunk(&chunk, &s->sample_spec);
 267     }
 268 }
 269
 270 uint32_t pa_sink_get_latency(struct pa_sink *s) {
 271     assert(s);
 272
 273     if (!s->get_latency)
 274         return 0;
 275
 276     return s->get_latency(s);
 277 }
 278
 279 void pa_sink_set_owner(struct pa_sink *sink, struct pa_module *m) {
 280     sink->owner = m;
 281
 282     if (sink->monitor_source)
 283         pa_source_set_owner(sink->monitor_source, m);
 284 }
 285
 286 void pa_sink_set_volume(struct pa_sink *sink, pa_volume_t volume) {
 287     assert(sink);
 288
 289     if (sink->volume != volume) {
 290         sink->volume = volume;
 291         pa_subscription_post(sink->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, sink->index);
 292     }
 293 }