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alsa: use ProcessLatency param to get and set internal latency

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This commit is contained in:
Wim Taymans 2021-08-17 09:14:40 +02:00
parent ee6d363481
commit 6d196b1d11
4 changed files with 174 additions and 92 deletions
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108
spa/plugins/alsa/alsa-pcm-source.c
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@ -55,6 +55,43 @@ static void reset_props(struct props *props)
props->use_chmap = DEFAULT_USE_CHMAP;
}
static void emit_node_info(struct state *this, bool full)
{
uint64_t old = full ? this->info.change_mask : 0;
if (full)
this->info.change_mask = this->info_all;
if (this->info.change_mask) {
struct spa_dict_item items[4];
uint32_t n_items = 0;
char latency[64];
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_DEVICE_API, "alsa");
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_MEDIA_CLASS, "Audio/Source");
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_DRIVER, "true");
if (this->have_format) {
snprintf(latency, sizeof(latency), "%lu/%d", this->buffer_frames / 4, this->rate);
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_MAX_LATENCY, latency);
}
this->info.props = &SPA_DICT_INIT(items, n_items);
spa_node_emit_info(&this->hooks, &this->info);
this->info.change_mask = old;
}
}
static void emit_port_info(struct state *this, bool full)
{
uint64_t old = full ? this->port_info.change_mask : 0;
if (full)
this->port_info.change_mask = this->port_info_all;
if (this->port_info.change_mask) {
spa_node_emit_port_info(&this->hooks,
SPA_DIRECTION_OUTPUT, 0, &this->port_info);
this->port_info.change_mask = old;
}
}
static int impl_node_enum_params(void *object, int seq,
uint32_t id, uint32_t start, uint32_t num,
const struct spa_pod *filter)
@ -165,6 +202,16 @@ static int impl_node_enum_params(void *object, int seq,
}
break;
case SPA_PARAM_ProcessLatency:
switch (result.index) {
case 0:
param = spa_process_latency_build(&b, id, &this->process_latency);
break;
default:
return 0;
}
break;
default:
return -ENOENT;
}
@ -206,6 +253,7 @@ static int impl_node_set_param(void *object, uint32_t id, uint32_t flags,
const struct spa_pod *param)
{
struct state *this = object;
int res;
spa_return_val_if_fail(this != NULL, -EINVAL);
@ -226,6 +274,22 @@ static int impl_node_set_param(void *object, uint32_t id, uint32_t flags,
SPA_PROP_START_CUSTOM, SPA_POD_OPT_Bool(&p->use_chmap));
break;
}
case SPA_PARAM_ProcessLatency:
{
struct spa_process_latency_info info;
if ((res = spa_process_latency_parse(param, &info)) < 0)
return res;
this->process_latency = info;
this->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS;
this->params[NODE_ProcessLatency].flags ^= SPA_PARAM_INFO_SERIAL;
emit_node_info(this, false);
this->port_info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
this->port_params[PORT_Latency].flags ^= SPA_PARAM_INFO_SERIAL;
emit_port_info(this, false);
break;
}
default:
return -ENOENT;
}
@ -272,42 +336,6 @@ static int impl_node_send_command(void *object, const struct spa_command *comman
return 0;
}
static void emit_node_info(struct state *this, bool full)
{
uint64_t old = full ? this->info.change_mask : 0;
if (full)
this->info.change_mask = this->info_all;
if (this->info.change_mask) {
struct spa_dict_item items[4];
uint32_t n_items = 0;
char latency[64];
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_DEVICE_API, "alsa");
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_MEDIA_CLASS, "Audio/Source");
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_DRIVER, "true");
if (this->have_format) {
snprintf(latency, sizeof(latency), "%lu/%d", this->buffer_frames / 4, this->rate);
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_MAX_LATENCY, latency);
}
this->info.props = &SPA_DICT_INIT(items, n_items);
spa_node_emit_info(&this->hooks, &this->info);
this->info.change_mask = old;
}
}
static void emit_port_info(struct state *this, bool full)
{
uint64_t old = full ? this->port_info.change_mask : 0;
if (full)
this->port_info.change_mask = this->port_info_all;
if (this->port_info.change_mask) {
spa_node_emit_port_info(&this->hooks,
SPA_DIRECTION_OUTPUT, 0, &this->port_info);
this->port_info.change_mask = old;
}
}
static int
impl_node_add_listener(void *object,
struct spa_hook *listener,
@ -457,8 +485,13 @@ impl_node_port_enum_params(void *object, int seq,
case SPA_PARAM_Latency:
switch (result.index) {
case 0: case 1:
param = spa_latency_build(&b, id, &this->latency[result.index]);
{
struct spa_latency_info latency = this->latency[result.index];
if (latency.direction == SPA_DIRECTION_OUTPUT)
spa_process_latency_info_add(&this->process_latency, &latency);
param = spa_latency_build(&b, id, &latency);
break;
}
default:
return 0;
}
@ -818,6 +851,7 @@ impl_init(const struct spa_handle_factory *factory,
this->params[NODE_PropInfo] = SPA_PARAM_INFO(SPA_PARAM_PropInfo, SPA_PARAM_INFO_READ);
this->params[NODE_Props] = SPA_PARAM_INFO(SPA_PARAM_Props, SPA_PARAM_INFO_READWRITE);
this->params[NODE_IO] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
this->params[NODE_ProcessLatency] = SPA_PARAM_INFO(SPA_PARAM_ProcessLatency, SPA_PARAM_INFO_READWRITE);
this->info.params = this->params;
this->info.n_params = N_NODE_PARAMS;
reset_props(&this->props);