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spa: Implement latency reporting

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Implement latency reporting in alsa
Implement latency reporting on audioconf by passing on the latency
from the follower to outside of the adapter.
This commit is contained in:
Wim Taymans 2021-05-21 10:01:37 +02:00
parent 1a8f274a80
commit 1cd6d7b01d
8 changed files with 212 additions and 4 deletions
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37
spa/plugins/audioconvert/audioadapter.c
View file

@ -83,7 +83,8 @@ struct impl {
#define IDX_Format 3
#define IDX_EnumPortConfig 4
#define IDX_PortConfig 5
#define N_NODE_PARAMS 6
#define IDX_Latency 6
#define N_NODE_PARAMS 7
struct spa_param_info params[N_NODE_PARAMS];
uint32_t convert_params_flags[N_NODE_PARAMS];
uint32_t follower_params_flags[N_NODE_PARAMS];
@ -715,12 +716,36 @@ static void follower_info(void *data, const struct spa_node_info *info)
emit_node_info(this, false);
}
static int recalc_latency(struct impl *this, enum spa_direction direction, uint32_t port_id)
{
struct spa_pod_builder b = { 0 };
uint8_t buffer[1024];
struct spa_pod *param;
uint32_t index = 0;
int res;
spa_pod_builder_init(&b, buffer, sizeof(buffer));
if ((res = spa_node_port_enum_params_sync(this->follower,
direction, port_id, SPA_PARAM_Latency,
&index, NULL, &param, &b)) != 1)
return res;
if ((res = spa_node_port_set_param(this->target,
SPA_DIRECTION_REVERSE(direction), 0,
SPA_PARAM_Latency, 0, param)) < 0)
return res;
return 0;
}
static void follower_port_info(void *data,
enum spa_direction direction, uint32_t port_id,
const struct spa_port_info *info)
{
struct impl *this = data;
uint32_t i;
int res;
if (info->change_mask & SPA_PORT_CHANGE_MASK_PARAMS) {
for (i = 0; i < info->n_params; i++) {
@ -730,6 +755,9 @@ static void follower_port_info(void *data,
case SPA_PARAM_Format:
idx = IDX_Format;
break;
case SPA_PARAM_Latency:
idx = IDX_Latency;
break;
default:
continue;
}
@ -742,6 +770,13 @@ static void follower_port_info(void *data,
(this->params[idx].flags & SPA_PARAM_INFO_SERIAL) |
(info->params[i].flags & SPA_PARAM_INFO_READWRITE);
if (idx == IDX_Latency) {
res = recalc_latency(this, direction, port_id);
if (res != 0)
spa_log_error(this->log, "latency: %d", res);
continue;
}
this->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS;
if (!this->add_listener)
this->params[idx].user++;