src/sinkinput.c

   1 #include <stdio.h>
   2 #include <assert.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 #include "sinkinput.h"
   7 #include "strbuf.h"
   8 #include "sample-util.h"
   9
  10 #define CONVERT_BUFFER_LENGTH 4096
  11
  12 struct pa_sink_input* pa_sink_input_new(struct pa_sink *s, const char *name, const struct pa_sample_spec *spec) {
  13     struct pa_sink_input *i;
  14     struct pa_resampler *resampler = NULL;
  15     int r;
  16     char st[256];
  17     assert(s && spec);
  18
  19     if (!pa_sample_spec_equal(spec, &s->sample_spec))
  20         if (!(resampler = pa_resampler_new(spec, &s->sample_spec)))
  21             return NULL;
  22
  23     i = malloc(sizeof(struct pa_sink_input));
  24     assert(i);
  25     i->name = name ? strdup(name) : NULL;
  26     i->sink = s;
  27     i->sample_spec = *spec;
  28
  29     i->peek = NULL;
  30     i->drop = NULL;
  31     i->kill = NULL;
  32     i->get_latency = NULL;
  33     i->userdata = NULL;
  34
  35     i->volume = PA_VOLUME_NORM;
  36
  37     i->resampled_chunk.memblock = NULL;
  38     i->resampled_chunk.index = i->resampled_chunk.length = 0;
  39     i->resampler = resampler;
  40
  41     assert(s->core);
  42     r = pa_idxset_put(s->core->sink_inputs, i, &i->index);
  43     assert(r == 0 && i->index != PA_IDXSET_INVALID);
  44     r = pa_idxset_put(s->inputs, i, NULL);
  45     assert(r == 0);
  46
  47     pa_sample_snprint(st, sizeof(st), spec);
  48     fprintf(stderr, "sink-input: created %u \"%s\" on %u with sample spec \"%s\"\n", i->index, i->name, s->index, st);
  49
  50     return i;
  51 }
  52
  53 void pa_sink_input_free(struct pa_sink_input* i) {
  54     assert(i);
  55
  56     assert(i->sink && i->sink->core);
  57     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
  58     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
  59
  60     if (i->resampled_chunk.memblock)
  61         pa_memblock_unref(i->resampled_chunk.memblock);
  62     if (i->resampler)
  63         pa_resampler_free(i->resampler);
  64
  65     free(i->name);
  66     free(i);
  67 }
  68
  69 void pa_sink_input_kill(struct pa_sink_input*i) {
  70     assert(i);
  71
  72     if (i->kill)
  73         i->kill(i);
  74 }
  75
  76 char *pa_sink_input_list_to_string(struct pa_core *c) {
  77     struct pa_strbuf *s;
  78     struct pa_sink_input *i;
  79     uint32_t index = PA_IDXSET_INVALID;
  80     assert(c);
  81
  82     s = pa_strbuf_new();
  83     assert(s);
  84
  85     pa_strbuf_printf(s, "%u sink input(s) available.\n", pa_idxset_ncontents(c->sink_inputs));
  86
  87     for (i = pa_idxset_first(c->sink_inputs, &index); i; i = pa_idxset_next(c->sink_inputs, &index)) {
  88         char ss[PA_SAMPLE_SNPRINT_MAX_LENGTH];
  89         pa_sample_snprint(ss, sizeof(ss), &i->sample_spec);
  90         assert(i->sink);
  91         pa_strbuf_printf(
  92             s, "    index: %u\n\tname: <%s>\n\tsink: <%u>\n\tvolume: <0x%04x>\n\tlatency: <%u usec>\n\tsample_spec: <%s>\n",
  93             i->index,
  94             i->name,
  95             i->sink->index,
  96             (unsigned) i->volume,
  97             pa_sink_input_get_latency(i),
  98             ss);
  99     }
 100
 101     return pa_strbuf_tostring_free(s);
 102 }
 103
 104 uint32_t pa_sink_input_get_latency(struct pa_sink_input *i) {
 105     uint32_t l = 0;
 106
 107     assert(i);
 108     if (i->get_latency)
 109         l += i->get_latency(i);
 110
 111     assert(i->sink);
 112     l += pa_sink_get_latency(i->sink);
 113
 114     return l;
 115 }
 116
 117
 118 int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
 119     assert(i && chunk && i->peek && i->drop);
 120
 121     if (!i->resampler)
 122         return i->peek(i, chunk);
 123
 124     if (!i->resampled_chunk.memblock) {
 125         struct pa_memchunk tchunk;
 126         size_t l;
 127         int ret;
 128
 129         if ((ret = i->peek(i, &tchunk)) < 0)
 130             return ret;
 131
 132         l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
 133         if (tchunk.length > l)
 134             tchunk.length = l;
 135
 136         i->drop(i, tchunk.length);
 137
 138         pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
 139         pa_memblock_unref(tchunk.memblock);
 140     }
 141
 142     assert(i->resampled_chunk.memblock && i->resampled_chunk.length);
 143     *chunk = i->resampled_chunk;
 144     pa_memblock_ref(i->resampled_chunk.memblock);
 145     return 0;
 146 }
 147
 148 void pa_sink_input_drop(struct pa_sink_input *i, size_t length) {
 149     assert(i && length);
 150
 151     if (!i->resampler) {
 152         i->drop(i, length);
 153         return;
 154     }
 155
 156     assert(i->resampled_chunk.memblock && i->resampled_chunk.length >= length);
 157
 158     i->resampled_chunk.index += length;
 159     i->resampled_chunk.length -= length;
 160
 161     if (!i->resampled_chunk.length) {
 162         pa_memblock_unref(i->resampled_chunk.memblock);
 163         i->resampled_chunk.memblock = NULL;
 164         i->resampled_chunk.index = i->resampled_chunk.length = 0;
 165     }
 166 }