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_sample_spec_equal(spec, &s->sample_spec))
  46         if (!(resampler = pa_resampler_new(spec, &s->sample_spec)))
  47             return NULL;
  48
  49     i = pa_xmalloc(sizeof(struct pa_sink_input));
  50     i->name = pa_xstrdup(name);
  51     i->client = NULL;
  52     i->owner = NULL;
  53     i->sink = s;
  54     i->sample_spec = *spec;
  55
  56     i->peek = NULL;
  57     i->drop = NULL;
  58     i->kill = NULL;
  59     i->get_latency = NULL;
  60     i->userdata = NULL;
  61
  62     i->volume = PA_VOLUME_NORM;
  63
  64     i->resampled_chunk.memblock = NULL;
  65     i->resampled_chunk.index = i->resampled_chunk.length = 0;
  66     i->resampler = resampler;
  67
  68     assert(s->core);
  69     r = pa_idxset_put(s->core->sink_inputs, i, &i->index);
  70     assert(r == 0 && i->index != PA_IDXSET_INVALID);
  71     r = pa_idxset_put(s->inputs, i, NULL);
  72     assert(r == 0);
  73
  74     pa_sample_snprint(st, sizeof(st), spec);
  75     fprintf(stderr, "sink-input: created %u \"%s\" on %u with sample spec \"%s\"\n", i->index, i->name, s->index, st);
  76
  77     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
  78
  79     return i;
  80 }
  81
  82 void pa_sink_input_free(struct pa_sink_input* i) {
  83     assert(i);
  84
  85     assert(i->sink && i->sink->core);
  86     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
  87     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
  88
  89     if (i->resampled_chunk.memblock)
  90         pa_memblock_unref(i->resampled_chunk.memblock);
  91     if (i->resampler)
  92         pa_resampler_free(i->resampler);
  93
  94     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
  95
  96     pa_xfree(i->name);
  97     pa_xfree(i);
  98 }
  99
 100 void pa_sink_input_kill(struct pa_sink_input*i) {
 101     assert(i);
 102
 103     if (i->kill)
 104         i->kill(i);
 105 }
 106
 107 uint32_t pa_sink_input_get_latency(struct pa_sink_input *i) {
 108     uint32_t l = 0;
 109
 110     assert(i);
 111     if (i->get_latency)
 112         l += i->get_latency(i);
 113
 114     assert(i->sink);
 115     l += pa_sink_get_latency(i->sink);
 116
 117     return l;
 118 }
 119
 120 int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
 121     assert(i && chunk && i->peek && i->drop);
 122
 123     if (!i->resampler)
 124         return i->peek(i, chunk);
 125
 126     if (!i->resampled_chunk.memblock) {
 127         struct pa_memchunk tchunk;
 128         size_t l;
 129         int ret;
 130
 131         if ((ret = i->peek(i, &tchunk)) < 0)
 132             return ret;
 133
 134         assert(tchunk.length);
 135
 136         l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
 137         if (tchunk.length > l)
 138             tchunk.length = l;
 139
 140         i->drop(i, tchunk.length);
 141
 142         pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
 143         pa_memblock_unref(tchunk.memblock);
 144     }
 145
 146     assert(i->resampled_chunk.memblock && i->resampled_chunk.length);
 147     *chunk = i->resampled_chunk;
 148     pa_memblock_ref(i->resampled_chunk.memblock);
 149     return 0;
 150 }
 151
 152 void pa_sink_input_drop(struct pa_sink_input *i, size_t length) {
 153     assert(i && length);
 154
 155     if (!i->resampler) {
 156         i->drop(i, length);
 157         return;
 158     }
 159
 160     assert(i->resampled_chunk.memblock && i->resampled_chunk.length >= length);
 161
 162     i->resampled_chunk.index += length;
 163     i->resampled_chunk.length -= length;
 164
 165     if (!i->resampled_chunk.length) {
 166         pa_memblock_unref(i->resampled_chunk.memblock);
 167         i->resampled_chunk.memblock = NULL;
 168         i->resampled_chunk.index = i->resampled_chunk.length = 0;
 169     }
 170 }
 171
 172 void pa_sink_input_set_volume(struct pa_sink_input *i, pa_volume_t volume) {
 173     assert(i && i->sink && i->sink->core);
 174
 175     if (i->volume != volume) {
 176         i->volume = volume;
 177         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 178     }
 179 }