// This will find the library and UUID tags of the sub effect pointed by the
// node, gets the effect descriptor and lib_entry_t and adds the subeffect -
// sub_entry_t to the gSubEffectList
int addSubEffect(cnode *root)
{
ALOGV("addSubEffect");
cnode *node;
effect_uuid_t uuid;
effect_descriptor_t *d;
lib_entry_t *l;
list_elem_t *e;
node = config_find(root, LIBRARY_TAG);
if (node == NULL) {
return -EINVAL;
}
l = getLibrary(node->value);
if (l == NULL) {
ALOGW("addSubEffect() could not get library %s", node->value);
return -EINVAL;
}
node = config_find(root, UUID_TAG);
if (node == NULL) {
return -EINVAL;
}
if (stringToUuid(node->value, &uuid) != 0) {
ALOGW("addSubEffect() invalid uuid %s", node->value);
return -EINVAL;
}
d = malloc(sizeof(effect_descriptor_t));
if (l->desc->get_descriptor(&uuid, d) != 0) {
char s[40];
uuidToString(&uuid, s, 40);
ALOGW("Error querying effect %s on lib %s", s, l->name);
free(d);
return -EINVAL;
}
#if (LOG_NDEBUG==0)
char s[256];
dumpEffectDescriptor(d, s, 256);
ALOGV("addSubEffect() read descriptor %p:%s",d, s);
#endif
if (EFFECT_API_VERSION_MAJOR(d->apiVersion) !=
EFFECT_API_VERSION_MAJOR(EFFECT_CONTROL_API_VERSION)) {
ALOGW("Bad API version %08x on lib %s", d->apiVersion, l->name);
free(d);
return -EINVAL;
}
sub_effect_entry_t *sub_effect = malloc(sizeof(sub_effect_entry_t));
sub_effect->object = d;
// lib_entry_t is stored since the sub effects are not linked to the library
sub_effect->lib = l;
e = malloc(sizeof(list_elem_t));
e->object = sub_effect;
e->next = gSubEffectList->sub_elem;
gSubEffectList->sub_elem = e;
ALOGV("addSubEffect end");
return 0;
}
int loadLibrary(cnode *root, const char *name)
{
cnode *node;
void *hdl;
audio_effect_library_t *desc;
list_elem_t *e;
lib_entry_t *l;
node = config_find(root, PATH_TAG);
if (node == NULL) {
return -EINVAL;
}
hdl = dlopen(node->value, RTLD_NOW);
if (hdl == NULL) {
ALOGW("loadLibrary() failed to open %s", node->value);
goto error;
}
desc = (audio_effect_library_t *)dlsym(hdl, AUDIO_EFFECT_LIBRARY_INFO_SYM_AS_STR);
if (desc == NULL) {
ALOGW("loadLibrary() could not find symbol %s", AUDIO_EFFECT_LIBRARY_INFO_SYM_AS_STR);
goto error;
}
if (AUDIO_EFFECT_LIBRARY_TAG != desc->tag) {
ALOGW("getLibrary() bad tag %08x in lib info struct", desc->tag);
goto error;
}
if (EFFECT_API_VERSION_MAJOR(desc->version) !=
EFFECT_API_VERSION_MAJOR(EFFECT_LIBRARY_API_VERSION)) {
ALOGW("loadLibrary() bad lib version %08x", desc->version);
goto error;
}
// add entry for library in gLibraryList
l = malloc(sizeof(lib_entry_t));
l->name = strndup(name, PATH_MAX);
l->path = strndup(node->value, PATH_MAX);
l->handle = hdl;
l->desc = desc;
l->effects = NULL;
pthread_mutex_init(&l->lock, NULL);
e = malloc(sizeof(list_elem_t));
e->object = l;
pthread_mutex_lock(&gLibLock);
e->next = gLibraryList;
gLibraryList = e;
pthread_mutex_unlock(&gLibLock);
ALOGV("getLibrary() linked library %p for path %s", l, node->value);
return 0;
error:
if (hdl != NULL) {
dlclose(hdl);
}
return -EINVAL;
}
int loadEffect(cnode *root)
{
cnode *node;
effect_uuid_t uuid;
lib_entry_t *l;
effect_descriptor_t *d;
list_elem_t *e;
node = config_find(root, LIBRARY_TAG);
if (node == NULL) {
return -EINVAL;
}
l = getLibrary(node->value);
if (l == NULL) {
ALOGW("loadEffect() could not get library %s", node->value);
return -EINVAL;
}
node = config_find(root, UUID_TAG);
if (node == NULL) {
return -EINVAL;
}
if (stringToUuid(node->value, &uuid) != 0) {
ALOGW("loadEffect() invalid uuid %s", node->value);
return -EINVAL;
}
d = malloc(sizeof(effect_descriptor_t));
if (!d) {
ALOGE("failed to allocate effect descriptor");
return -EINVAL;
}
if (l->desc->get_descriptor(&uuid, d) != 0) {
char s[40];
uuidToString(&uuid, s, 40);
ALOGW("Error querying effect %s on lib %s", s, l->name);
free(d);
return -EINVAL;
}
#if (LOG_NDEBUG==0)
char s[256];
dumpEffectDescriptor(d, s, 256);
ALOGV("loadEffect() read descriptor %p:%s",d, s);
#endif
if (EFFECT_API_VERSION_MAJOR(d->apiVersion) !=
EFFECT_API_VERSION_MAJOR(EFFECT_CONTROL_API_VERSION)) {
ALOGW("Bad API version %08x on lib %s", d->apiVersion, l->name);
free(d);
return -EINVAL;
}
e = malloc(sizeof(list_elem_t));
if (!e) {
return -ENOMEM;
}
e->object = d;
e->next = l->effects;
l->effects = e;
// After the UUID node in the config_tree, if node->next is valid,
// that would be sub effect node.
// Find the sub effects and add them to the gSubEffectList
node = node->next;
int count = 2;
bool hwSubefx = false, swSubefx = false;
list_sub_elem_t *sube = NULL;
if (node != NULL) {
ALOGV("Adding the effect to gEffectSubList as there are sub effects");
sube = malloc(sizeof(list_sub_elem_t));
if (!sube) {
ALOGE("failed to allocate sub element list");
return -ENOMEM;
}
sube->object = d;
sube->sub_elem = NULL;
sube->next = gSubEffectList;
gSubEffectList = sube;
}
while (node != NULL && count) {
if (addSubEffect(node)) {
ALOGW("loadEffect() could not add subEffect %s", node->value);
// Change the gSubEffectList to point to older list;
gSubEffectList = sube->next;
free(sube->sub_elem);// Free an already added sub effect
sube->sub_elem = NULL;
free(sube);
return -ENOENT;
}
sub_effect_entry_t *subEntry = (sub_effect_entry_t*)gSubEffectList->sub_elem->object;
effect_descriptor_t *subEffectDesc = (effect_descriptor_t*)(subEntry->object);
// Since we return a dummy descriptor for the proxy during
// get_descriptor call,we replace it with the correspoding
// sw effect descriptor, but with Proxy UUID
// check for Sw desc
if (!((subEffectDesc->flags & EFFECT_FLAG_HW_ACC_MASK) ==
EFFECT_FLAG_HW_ACC_TUNNEL)) {
swSubefx = true;
*d = *subEffectDesc;
d->uuid = uuid;
ALOGV("loadEffect() Changed the Proxy desc");
} else
hwSubefx = true;
count--;
node = node->next;
}
// 1 HW and 1 SW sub effect found. Set the offload flag in the Proxy desc
if (hwSubefx && swSubefx) {
d->flags |= EFFECT_FLAG_OFFLOAD_SUPPORTED;
}
return 0;
}
