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v4l2: add support for ParamBegin/End

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To keep the device open while we perform a series of param
enumerations.
This commit is contained in:
Wim Taymans 2021-10-29 15:41:27 +02:00
parent 9facfca45b
commit 9f134ee79d
1 changed files with 13 additions and 2 deletions
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15
spa/plugins/v4l2/v4l2-source.c
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@ -304,16 +304,27 @@ static int impl_node_set_io(void *object, uint32_t id, void *data, size_t size)
static int impl_node_send_command(void *object, const struct spa_command *command) static int impl_node_send_command(void *object, const struct spa_command *command)
{ {
struct impl *this = object; struct impl *this = object;
struct port *port;
int res; int res;
spa_return_val_if_fail(this != NULL, -EINVAL); spa_return_val_if_fail(this != NULL, -EINVAL);
spa_return_val_if_fail(command != NULL, -EINVAL); spa_return_val_if_fail(command != NULL, -EINVAL);
port = GET_OUT_PORT(this, 0);
switch (SPA_NODE_COMMAND_ID(command)) { switch (SPA_NODE_COMMAND_ID(command)) {
case SPA_NODE_COMMAND_ParamBegin:
if ((res = spa_v4l2_open(&port->dev, NULL)) < 0)
return res;
break;
case SPA_NODE_COMMAND_ParamEnd:
if (port->have_format)
return 0;
if ((res = spa_v4l2_close(&port->dev)) < 0)
return res;
break;
case SPA_NODE_COMMAND_Start: case SPA_NODE_COMMAND_Start:
{ {
struct port *port = GET_OUT_PORT(this, 0);
if (!port->have_format) { if (!port->have_format) {
spa_log_error(this->log, "no format"); spa_log_error(this->log, "no format");
return -EIO; return -EIO;