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
  36 #define CONVERT_BUFFER_LENGTH 4096
  37
  38 struct pa_sink_input* pa_sink_input_new(struct pa_sink *s, const char *name, const struct pa_sample_spec *spec) {
  39     struct pa_sink_input *i;
  40     struct pa_resampler *resampler = NULL;
  41     int r;
  42     char st[256];
  43     assert(s && spec);
  44
  45     if (pa_idxset_ncontents(s->inputs) >= PA_MAX_INPUTS_PER_SINK) {
  46         fprintf(stderr, __FILE__": Failed to create sink input: too many inputs per sink.\n");
  47         return NULL;
  48     }
  49
  50     if (!pa_sample_spec_equal(spec, &s->sample_spec))
  51         if (!(resampler = pa_resampler_new(spec, &s->sample_spec, s->core->memblock_stat)))
  52             return NULL;
  53
  54     i = pa_xmalloc(sizeof(struct pa_sink_input));
  55     i->name = pa_xstrdup(name);
  56     i->client = NULL;
  57     i->owner = NULL;
  58     i->sink = s;
  59     i->sample_spec = *spec;
  60
  61     i->peek = NULL;
  62     i->drop = NULL;
  63     i->kill = NULL;
  64     i->get_latency = NULL;
  65     i->userdata = NULL;
  66
  67     i->corked = 0;
  68     i->volume = PA_VOLUME_NORM;
  69
  70     i->resampled_chunk.memblock = NULL;
  71     i->resampled_chunk.index = i->resampled_chunk.length = 0;
  72     i->resampler = resampler;
  73
  74     assert(s->core);
  75     r = pa_idxset_put(s->core->sink_inputs, i, &i->index);
  76     assert(r == 0 && i->index != PA_IDXSET_INVALID);
  77     r = pa_idxset_put(s->inputs, i, NULL);
  78     assert(r == 0);
  79
  80     pa_sample_spec_snprint(st, sizeof(st), spec);
  81     fprintf(stderr, "sink-input: created %u \"%s\" on %u with sample spec \"%s\"\n", i->index, i->name, s->index, st);
  82
  83     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
  84
  85     return i;
  86 }
  87
  88 void pa_sink_input_free(struct pa_sink_input* i) {
  89     assert(i);
  90
  91     assert(i->sink && i->sink->core);
  92     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
  93     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
  94
  95     if (i->resampled_chunk.memblock)
  96         pa_memblock_unref(i->resampled_chunk.memblock);
  97     if (i->resampler)
  98         pa_resampler_free(i->resampler);
  99
 100     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 101
 102     pa_xfree(i->name);
 103     pa_xfree(i);
 104 }
 105
 106 void pa_sink_input_kill(struct pa_sink_input*i) {
 107     assert(i);
 108
 109     if (i->kill)
 110         i->kill(i);
 111 }
 112
 113 pa_usec_t pa_sink_input_get_latency(struct pa_sink_input *i) {
 114     assert(i);
 115
 116     if (i->get_latency)
 117         return i->get_latency(i);
 118
 119     return 0;
 120 }
 121
 122 int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
 123     assert(i && chunk && i->peek && i->drop);
 124
 125     if (i->corked)
 126         return -1;
 127
 128     if (!i->resampler)
 129         return i->peek(i, chunk);
 130
 131     if (!i->resampled_chunk.memblock) {
 132         struct pa_memchunk tchunk;
 133         size_t l;
 134         int ret;
 135
 136         if ((ret = i->peek(i, &tchunk)) < 0)
 137             return ret;
 138
 139         assert(tchunk.length);
 140
 141         l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
 142
 143         if (tchunk.length > l)
 144             tchunk.length = l;
 145
 146         i->drop(i, &tchunk, tchunk.length);
 147
 148         pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
 149         pa_memblock_unref(tchunk.memblock);
 150     }
 151
 152     assert(i->resampled_chunk.memblock && i->resampled_chunk.length);
 153     *chunk = i->resampled_chunk;
 154     pa_memblock_ref(i->resampled_chunk.memblock);
 155     return 0;
 156 }
 157
 158 void pa_sink_input_drop(struct pa_sink_input *i, const struct pa_memchunk *chunk, size_t length) {
 159     assert(i && length);
 160
 161     if (!i->resampler) {
 162         i->drop(i, chunk, length);
 163         return;
 164     }
 165
 166     assert(i->resampled_chunk.memblock && i->resampled_chunk.length >= length);
 167
 168     i->resampled_chunk.index += length;
 169     i->resampled_chunk.length -= length;
 170
 171     if (!i->resampled_chunk.length) {
 172         pa_memblock_unref(i->resampled_chunk.memblock);
 173         i->resampled_chunk.memblock = NULL;
 174         i->resampled_chunk.index = i->resampled_chunk.length = 0;
 175     }
 176 }
 177
 178 void pa_sink_input_set_volume(struct pa_sink_input *i, pa_volume_t volume) {
 179     assert(i && i->sink && i->sink->core);
 180
 181     if (i->volume != volume) {
 182         i->volume = volume;
 183         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 184     }
 185 }
 186
 187 void pa_sink_input_cork(struct pa_sink_input *i, int b) {
 188     int n;
 189     assert(i);
 190     n = i->corked && !b;
 191     i->corked = b;
 192
 193     if (n)
 194         pa_sink_notify(i->sink);
 195 }