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);
  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->name = pa_xstrdup(name);
  57     i->client = NULL;
  58     i->owner = NULL;
  59     i->sink = s;
  60     i->sample_spec = *spec;
  61
  62     i->peek = NULL;
  63     i->drop = NULL;
  64     i->kill = NULL;
  65     i->get_latency = NULL;
  66     i->userdata = NULL;
  67
  68     i->corked = 0;
  69     i->volume = PA_VOLUME_NORM;
  70
  71     i->resampled_chunk.memblock = NULL;
  72     i->resampled_chunk.index = i->resampled_chunk.length = 0;
  73     i->resampler = resampler;
  74
  75     assert(s->core);
  76     r = pa_idxset_put(s->core->sink_inputs, i, &i->index);
  77     assert(r == 0 && i->index != PA_IDXSET_INVALID);
  78     r = pa_idxset_put(s->inputs, i, NULL);
  79     assert(r == 0);
  80
  81     pa_sample_spec_snprint(st, sizeof(st), spec);
  82     pa_log(__FILE__": created %u \"%s\" on %u with sample spec \"%s\"\n", i->index, i->name, s->index, st);
  83
  84     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
  85
  86     return i;
  87 }
  88
  89 void pa_sink_input_free(struct pa_sink_input* i) {
  90     assert(i);
  91
  92     assert(i->sink && i->sink->core);
  93     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
  94     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
  95
  96     if (i->resampled_chunk.memblock)
  97         pa_memblock_unref(i->resampled_chunk.memblock);
  98     if (i->resampler)
  99         pa_resampler_free(i->resampler);
 100
 101     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 102
 103     pa_xfree(i->name);
 104     pa_xfree(i);
 105 }
 106
 107 void pa_sink_input_kill(struct pa_sink_input*i) {
 108     assert(i);
 109
 110     if (i->kill)
 111         i->kill(i);
 112 }
 113
 114 pa_usec_t pa_sink_input_get_latency(struct pa_sink_input *i) {
 115     pa_usec_t r = 0;
 116     assert(i);
 117
 118     if (i->get_latency)
 119         r += i->get_latency(i);
 120
 121     if (i->resampled_chunk.memblock)
 122         r += pa_bytes_to_usec(i->resampled_chunk.length, &i->sample_spec);
 123
 124     return r;
 125 }
 126
 127 int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
 128     assert(i && chunk && i->peek && i->drop);
 129
 130     if (i->corked)
 131         return -1;
 132
 133     if (!i->resampler)
 134         return i->peek(i, chunk);
 135
 136     while (!i->resampled_chunk.memblock) {
 137         struct pa_memchunk tchunk;
 138         size_t l;
 139         int ret;
 140
 141         if ((ret = i->peek(i, &tchunk)) < 0)
 142             return ret;
 143
 144         assert(tchunk.length);
 145
 146         l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
 147
 148         if (l > tchunk.length)
 149             l = tchunk.length;
 150
 151         i->drop(i, &tchunk, l);
 152         tchunk.length = l;
 153
 154         pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
 155         pa_memblock_unref(tchunk.memblock);
 156     }
 157
 158     assert(i->resampled_chunk.memblock && i->resampled_chunk.length);
 159     *chunk = i->resampled_chunk;
 160     pa_memblock_ref(i->resampled_chunk.memblock);
 161     return 0;
 162 }
 163
 164 void pa_sink_input_drop(struct pa_sink_input *i, const struct pa_memchunk *chunk, size_t length) {
 165     assert(i && length);
 166
 167     if (!i->resampler) {
 168         i->drop(i, chunk, length);
 169         return;
 170     }
 171
 172     assert(i->resampled_chunk.memblock && i->resampled_chunk.length >= length);
 173
 174     i->resampled_chunk.index += length;
 175     i->resampled_chunk.length -= length;
 176
 177     if (!i->resampled_chunk.length) {
 178         pa_memblock_unref(i->resampled_chunk.memblock);
 179         i->resampled_chunk.memblock = NULL;
 180         i->resampled_chunk.index = i->resampled_chunk.length = 0;
 181     }
 182 }
 183
 184 void pa_sink_input_set_volume(struct pa_sink_input *i, pa_volume_t volume) {
 185     assert(i && i->sink && i->sink->core);
 186
 187     if (i->volume != volume) {
 188         i->volume = volume;
 189         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 190     }
 191 }
 192
 193 void pa_sink_input_cork(struct pa_sink_input *i, int b) {
 194     int n;
 195     assert(i);
 196     n = i->corked && !b;
 197     i->corked = b;
 198
 199     if (n)
 200         pa_sink_notify(i->sink);
 201 }
 202
 203 void pa_sink_input_set_rate(struct pa_sink_input *i, uint32_t rate) {
 204     assert(i && i->resampler);
 205
 206     if (i->sample_spec.rate == rate)
 207         return;
 208
 209     i->sample_spec.rate = rate;
 210     pa_resampler_set_input_rate(i->resampler, rate);
 211 }