code.delx.au - pulseaudio/blob - polyp/scache.c

   1 #include <assert.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 #include "scache.h"
   6 #include "sink-input.h"
   7
   8 static void free_entry(struct pa_scache_entry *e) {
   9     assert(e);
  10     free(e->name);
  11     if (e->memchunk.memblock)
  12         pa_memblock_unref(e->memchunk.memblock);
  13     free(e);
  14 }
  15
  16 void pa_scache_add_item(struct pa_core *c, const char *name, struct pa_sample_spec *ss, struct pa_memchunk *chunk, uint32_t *index) {
  17     struct pa_scache_entry *e;
  18     int put;
  19     assert(c && name);
  20
  21     if (c->scache_hashmap && (e = pa_hashmap_get(c->scache_hashmap, name))) {
  22         put = 0;
  23         if (e->memchunk.memblock)
  24             pa_memblock_unref(e->memchunk.memblock);
  25     } else {
  26         put = 1;
  27         e = malloc(sizeof(struct pa_scache_entry));
  28         assert(e);
  29         e->name = strdup(name);
  30         assert(e->name);
  31     }
  32
  33     if (ss)
  34         e->sample_spec = *ss;
  35     else
  36         memset(&e->sample_spec, 0, sizeof(struct pa_sample_spec));
  37
  38     if (chunk) {
  39         e->memchunk = *chunk;
  40         pa_memblock_ref(e->memchunk.memblock);
  41     } else {
  42         e->memchunk.memblock = NULL;
  43         e->memchunk.index = e->memchunk.length = 0;
  44     }
  45
  46     if (put) {
  47         if (!c->scache_hashmap) {
  48             c->scache_hashmap = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
  49             assert(c->scache_hashmap);
  50         }
  51
  52         if (!c->scache_idxset) {
  53             c->scache_idxset = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
  54             assert(c->scache_idxset);
  55         }
  56
  57         pa_idxset_put(c->scache_idxset, e, &e->index);
  58         pa_hashmap_put(c->scache_hashmap, e->name, e);
  59     }
  60
  61     if (index)
  62         *index = e->index;
  63 }
  64
  65 int pa_scache_remove_item(struct pa_core *c, const char *name) {
  66     struct pa_scache_entry *e;
  67     assert(c && name);
  68
  69     if (!c->scache_hashmap || !(e = pa_hashmap_get(c->scache_hashmap, name)))
  70         return -1;
  71
  72     pa_hashmap_remove(c->scache_hashmap, name);
  73     pa_idxset_remove_by_index(c->scache_idxset, e->index);
  74     free_entry(e);
  75     return 0;
  76 }
  77
  78 static void free_cb(void *p, void *userdata) {
  79     struct pa_scache_entry *e = p;
  80     assert(e);
  81     free_entry(e);
  82 }
  83
  84 void pa_scache_free(struct pa_core *c) {
  85     assert(c);
  86
  87     if (c->scache_hashmap) {
  88         pa_hashmap_free(c->scache_hashmap, free_cb, NULL);
  89         c->scache_hashmap = NULL;
  90     }
  91
  92     if (c->scache_idxset) {
  93         pa_idxset_free(c->scache_idxset, NULL, NULL);
  94         c->scache_idxset = NULL;
  95     }
  96 }
  97
  98 static void sink_input_kill(struct pa_sink_input *i) {
  99     struct pa_memchunk *c;
 100     assert(i && i->userdata);
 101     c = i->userdata;
 102
 103     pa_memblock_unref(c->memblock);
 104     free(c);
 105     pa_sink_input_free(i);
 106 }
 107
 108 static int sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
 109     struct pa_memchunk *c;
 110     assert(i && chunk && i->userdata);
 111     c = i->userdata;
 112
 113     assert(c->length && c->memblock && c->memblock->length);
 114     *chunk = *c;
 115     pa_memblock_ref(c->memblock);
 116
 117     return 0;
 118 }
 119
 120 static void sink_input_drop(struct pa_sink_input *i, size_t length) {
 121     struct pa_memchunk *c;
 122     assert(i && length && i->userdata);
 123     c = i->userdata;
 124
 125     assert(length <= c->length);
 126
 127     c->length -= length;
 128     c->index += length;
 129
 130     if (c->length <= 0)
 131         sink_input_kill(i);
 132 }
 133
 134 int pa_scache_play_item(struct pa_core *c, const char *name, struct pa_sink *sink, uint32_t volume) {
 135     struct pa_sink_input *si;
 136     struct pa_scache_entry *e;
 137     struct pa_memchunk *chunk;
 138     assert(c && name && sink);
 139
 140     if (!c->scache_hashmap || !(e = pa_hashmap_get(c->scache_hashmap, name)))
 141         return -1;
 142
 143     if (!e->memchunk.memblock)
 144         return -1;
 145
 146     if (!(si = pa_sink_input_new(sink, name, &e->sample_spec)))
 147         return -1;
 148
 149     si->volume = volume;
 150
 151     si->peek = sink_input_peek;
 152     si->drop = sink_input_drop;
 153     si->kill = sink_input_kill;
 154     si->userdata = chunk = malloc(sizeof(struct pa_memchunk));
 155     assert(chunk);
 156     *chunk = e->memchunk;
 157     pa_memblock_ref(chunk->memblock);
 158
 159     return 0;
 160 }
 161
 162 const char * pa_scache_get_name_by_id(struct pa_core *c, uint32_t id) {
 163     struct pa_scache_entry *e;
 164     assert(c && id != PA_IDXSET_INVALID);
 165
 166     if (!c->scache_idxset || !(e = pa_idxset_get_by_index(c->scache_idxset, id)))
 167         return NULL;
 168
 169     return e->name;
 170
 171 }
 172
 173 uint32_t pa_scache_get_id_by_name(struct pa_core *c, const char *name) {
 174     struct pa_scache_entry *e;
 175     assert(c && name);
 176
 177     if (!c->scache_hashmap || !(e = pa_hashmap_get(c->scache_hashmap, name)))
 178         return PA_IDXSET_INVALID;
 179
 180     return e->index;
 181 }