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examples: fix volume fade in and out with control

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This commit is contained in:
Wim Taymans 2022-06-15 18:06:53 +02:00
parent c160cd0176
commit f74b59b39f
1 changed files with 18 additions and 3 deletions
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21
spa/examples/adapter-control.c
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@ -109,6 +109,7 @@ struct data {
int buffer_count;
bool start_faid_in;
double volume_accum;
uint32_t volume_offs;
bool running;
pthread_t thread;
@ -181,6 +182,7 @@ int init_data(struct data *data)
/* start not doing fade-in */
data->start_faid_in = true;
data->volume_accum = 0.0;
data->volume_offs = 0;
/* init the graph */
spa_graph_init(&data->graph, &data->graph_state);
@ -300,12 +302,14 @@ static int fade_in(struct data *data)
spa_pod_builder_init(&b, buffer, buffer_size);
spa_pod_builder_push_sequence(&b, &f[0], 0);
data->volume_offs = 200;
do {
spa_pod_builder_control(&b, 200, SPA_CONTROL_Properties);
spa_pod_builder_control(&b, data->volume_offs, SPA_CONTROL_Properties);
spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_Props, 0,
SPA_PROP_volume, SPA_POD_Float(data->volume_accum));
data->volume_accum += 0.003;
data->volume_offs += 200;
} while (data->volume_accum < 1.0);
spa_pod_builder_pop(&b, &f[0]);
@ -324,12 +328,14 @@ static int fade_out(struct data *data)
spa_pod_builder_init(&b, buffer, buffer_size);
spa_pod_builder_push_sequence(&b, &f[0], 0);
data->volume_offs = 200;
do {
spa_pod_builder_control(&b, 200, SPA_CONTROL_Properties);
spa_pod_builder_control(&b, data->volume_offs, SPA_CONTROL_Properties);
spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_Props, 0,
SPA_PROP_volume, SPA_POD_Float(data->volume_accum));
data->volume_accum -= 0.003;
data->volume_offs += 200;
} while (data->volume_accum > 0.0);
spa_pod_builder_pop(&b, &f[0]);
@ -371,7 +377,7 @@ static int on_sink_node_ready(void *_data, int status)
/* update buffer count */
data->buffer_count++;
if (data->buffer_count > 16)
if (data->buffer_count > 64)
data->buffer_count = 0;
spa_graph_node_process(&data->graph_source_node);
@ -644,6 +650,15 @@ static int negotiate_formats(struct data *data)
SPA_DIRECTION_INPUT, 0, SPA_PARAM_Format, 0, param)) < 0)
return res;
spa_pod_builder_init(&b, buffer, sizeof(buffer));
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_Format, SPA_PARAM_Format,
SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_application),
SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_control));
if ((res = spa_node_port_set_param(data->sink_node,
SPA_DIRECTION_INPUT, 1, SPA_PARAM_Format, 0, param)) < 0)
return res;
/* get the source node buffer size */
spa_pod_builder_init(&b, buffer, sizeof(buffer));
if ((res = spa_node_port_enum_params_sync(data->source_node,