sample cache work

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@98 fefdeb5f-60dc-0310-8127-8f9354f1896f

polyp/scache.c

@@ -0,0 +1,181 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "scache.h"
+#include "sink-input.h"
+
+static void free_entry(struct pa_scache_entry *e) {
+    assert(e);
+    free(e->name);
+    if (e->memchunk.memblock)
+        pa_memblock_unref(e->memchunk.memblock);
+    free(e);
+}
+
+void pa_scache_add_item(struct pa_core *c, const char *name, struct pa_sample_spec *ss, struct pa_memchunk *chunk, uint32_t *index) {
+    struct pa_scache_entry *e;
+    int put;
+    assert(c && name);
+
+    if (c->scache_hashmap && (e = pa_hashmap_get(c->scache_hashmap, name))) {
+        put = 0;
+        if (e->memchunk.memblock)
+            pa_memblock_unref(e->memchunk.memblock);
+    } else {
+        put = 1;
+        e = malloc(sizeof(struct pa_scache_entry));
+        assert(e);
+        e->name = strdup(name);
+        assert(e->name);
+    }
+
+    if (ss)
+        e->sample_spec = *ss;
+    else
+        memset(&e->sample_spec, 0, sizeof(struct pa_sample_spec));
+
+    if (chunk) {
+        e->memchunk = *chunk;
+        pa_memblock_ref(e->memchunk.memblock);
+    } else {
+        e->memchunk.memblock = NULL;
+        e->memchunk.index = e->memchunk.length = 0;
+    }
+
+    if (put) {
+        if (!c->scache_hashmap) {
+            c->scache_hashmap = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
+            assert(c->scache_hashmap);
+        }
+        
+        if (!c->scache_idxset) {
+            c->scache_idxset = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+            assert(c->scache_idxset);
+        }
+        
+        pa_idxset_put(c->scache_idxset, e, &e->index);
+        pa_hashmap_put(c->scache_hashmap, e->name, e);
+    }
+        
+    if (index)
+        *index = e->index;
+}
+
+int pa_scache_remove_item(struct pa_core *c, const char *name) {
+    struct pa_scache_entry *e;
+    assert(c && name);
+
+    if (!c->scache_hashmap || !(e = pa_hashmap_get(c->scache_hashmap, name)))
+        return -1;
+
+    pa_hashmap_remove(c->scache_hashmap, name);
+    pa_idxset_remove_by_index(c->scache_idxset, e->index);
+    free_entry(e);
+    return 0;
+}
+
+static void free_cb(void *p, void *userdata) {
+    struct pa_scache_entry *e = p;
+    assert(e);
+    free_entry(e);
+}
+
+void pa_scache_free(struct pa_core *c) {
+    assert(c);
+
+    if (c->scache_hashmap) {
+        pa_hashmap_free(c->scache_hashmap, free_cb, NULL);
+        c->scache_hashmap = NULL;
+    }
+
+    if (c->scache_idxset) {
+        pa_idxset_free(c->scache_idxset, NULL, NULL);
+        c->scache_idxset = NULL;
+    }
+}
+
+static void sink_input_kill(struct pa_sink_input *i) {
+    struct pa_memchunk *c;
+    assert(i && i->userdata);
+    c = i->userdata;
+
+    pa_memblock_unref(c->memblock);
+    free(c);
+    pa_sink_input_free(i);
+}
+
+static int sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
+    struct pa_memchunk *c;
+    assert(i && chunk && i->userdata);
+    c = i->userdata;
+
+    assert(c->length && c->memblock && c->memblock->length);
+    *chunk = *c;
+    pa_memblock_ref(c->memblock);
+    
+    return 0;
+}
+
+static void sink_input_drop(struct pa_sink_input *i, size_t length) {
+    struct pa_memchunk *c;
+    assert(i && length && i->userdata);
+    c = i->userdata;
+
+    assert(length <= c->length);
+
+    c->length -= length;
+    c->index += length;
+
+    if (c->length <= 0)
+        sink_input_kill(i);
+}
+
+int pa_scache_play_item(struct pa_core *c, const char *name, struct pa_sink *sink, uint32_t volume) {
+    struct pa_sink_input *si;
+    struct pa_scache_entry *e;
+    struct pa_memchunk *chunk;
+    assert(c && name && sink);
+
+    if (!c->scache_hashmap || !(e = pa_hashmap_get(c->scache_hashmap, name)))
+        return -1;
+
+    if (!e->memchunk.memblock)
+        return -1;
+    
+    if (!(si = pa_sink_input_new(sink, name, &e->sample_spec)))
+        return -1;
+
+    si->volume = volume;
+
+    si->peek = sink_input_peek;
+    si->drop = sink_input_drop;
+    si->kill = sink_input_kill;
+    si->userdata = chunk = malloc(sizeof(struct pa_memchunk));
+    assert(chunk);
+    *chunk = e->memchunk;
+    pa_memblock_ref(chunk->memblock);
+
+    return 0;
+}
+
+const char * pa_scache_get_name_by_id(struct pa_core *c, uint32_t id) {
+    struct pa_scache_entry *e;
+    assert(c && id != PA_IDXSET_INVALID);
+
+    if (!c->scache_idxset || !(e = pa_idxset_get_by_index(c->scache_idxset, id)))
+        return NULL;
+
+    return e->name;
+    
+}
+
+uint32_t pa_scache_get_id_by_name(struct pa_core *c, const char *name) {
+    struct pa_scache_entry *e;
+    assert(c && name);
+
+    if (!c->scache_hashmap || !(e = pa_hashmap_get(c->scache_hashmap, name)))
+        return PA_IDXSET_INVALID;
+
+    return e->index;
+}