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filter-graph: warn about unaligned streams

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Keep track of min/max latencies and warn when streams are unaligned.
This commit is contained in:
Wim Taymans 2025-05-08 10:52:57 +02:00
parent 8e4c211a80
commit 46f5740604
1 changed files with 44 additions and 16 deletions
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60
spa/plugins/filter-graph/filter-graph.c
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@ -116,9 +116,10 @@ struct node {
void *hndl[MAX_HNDL];
unsigned int n_deps;
uint32_t latency_index;
float latency;
float min_latency;
float max_latency;
unsigned int disabled:1;
unsigned int control_changed:1;
@ -198,7 +199,8 @@ struct graph {
uint32_t outputs_position[SPA_AUDIO_MAX_CHANNELS];
uint32_t n_outputs_position;
float latency;
float min_latency;
float max_latency;
unsigned activated:1;
unsigned setup:1;
@ -273,7 +275,8 @@ static void emit_filter_graph_info(struct impl *impl, bool full)
items[dict.n_items++] = SPA_DICT_ITEM("outputs.audio.position", out_pos);
}
items[dict.n_items++] = SPA_DICT_ITEM("latency",
spa_dtoa(latency, sizeof(latency), graph->latency));
spa_dtoa(latency, sizeof(latency),
(graph->min_latency + graph->max_latency) / 2.0f));
impl->info.props = &dict;
spa_filter_graph_emit_info(&impl->hooks, &impl->info);
impl->info.props = NULL;
@ -1535,7 +1538,7 @@ static int impl_activate(void *object, const struct spa_dict *props)
const struct spa_fga_plugin *p;
uint32_t i, j, max_samples = impl->quantum_limit, n_ports;
int res;
float *sd, *dd, *data, latency;
float *sd, *dd, *data, min_latency, max_latency;
const char *rate, *str;
if (graph->activated)
@ -1661,30 +1664,55 @@ static int impl_activate(void *object, const struct spa_dict *props)
/* calculate latency */
sort_reset(graph);
while ((node = sort_next_node(graph)) != NULL) {
latency = 0.0f;
min_latency = FLT_MAX;
max_latency = 0.0f;
for (i = 0; i < node->desc->n_input; i++) {
spa_list_for_each(link, &node->input_port[i].link_list, input_link)
latency = fmaxf(latency, link->output->node->latency);
spa_list_for_each(link, &node->input_port[i].link_list, input_link) {
min_latency = fminf(min_latency, link->output->node->min_latency);
max_latency = fmaxf(max_latency, link->output->node->max_latency);
}
}
min_latency = min_latency == FLT_MAX ? 0.0f : min_latency;
if (node->latency_index != SPA_IDX_INVALID) {
port = &node->notify_port[node->latency_index];
latency += port->control_data[0];
min_latency += port->control_data[0];
max_latency += port->control_data[0];
}
node->latency = latency;
spa_log_debug(impl->log, "%s latency:%f", node->name, latency);
node->min_latency = min_latency;
node->max_latency = max_latency;
spa_log_info(impl->log, "%s latency:%f-%f", node->name, min_latency, max_latency);
}
latency = 0.0f;
min_latency = FLT_MAX;
max_latency = 0.0f;
for (i = 0; i < graph->n_outputs; i++) {
struct graph_port *port = &graph->output[i];
latency = fmaxf(latency, port->node->latency);
max_latency = fmaxf(max_latency, port->node->max_latency);
min_latency = fminf(min_latency, port->node->min_latency);
}
min_latency = min_latency == FLT_MAX ? 0.0f : min_latency;
if (graph->latency != latency) {
graph->latency = latency;
spa_log_info(impl->log, "graph latency min:%f max:%f", min_latency, max_latency);
if (min_latency != max_latency) {
spa_log_warn(impl->log, "graph has unaligned latency min:%f max:%f, "
"consider adding delays or tweak node latency to "
"align the signals", min_latency, max_latency);
for (i = 0; i < graph->n_outputs; i++) {
struct graph_port *port = &graph->output[i];
if (min_latency != port->node->min_latency ||
max_latency != port->node->max_latency)
spa_log_warn(impl->log, "output port %d from %s min:%f max:%f",
i, port->node->name,
port->node->min_latency, port->node->max_latency);
}
}
if (graph->min_latency != min_latency || graph->max_latency != max_latency) {
graph->min_latency = min_latency;
graph->max_latency = max_latency;
impl->info.change_mask |= SPA_FILTER_GRAPH_CHANGE_MASK_PROPS;
spa_log_info(impl->log, "graph latency:%f", latency);
}
emit_filter_graph_info(impl, false);
spa_filter_graph_emit_props_changed(&impl->hooks, SPA_DIRECTION_INPUT);