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libcamera: add latency param query

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JACK queries this unconditionally but it's a good idea to implement this
like v4l2-source.
This commit is contained in:
Wim Taymans 2023-11-20 17:51:27 +01:00
parent 0fe7bd2780
commit e4cee8eec2
1 changed files with 18 additions and 1 deletions
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19
spa/plugins/libcamera/libcamera-source.cpp
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@ -26,6 +26,7 @@
#include <spa/node/keys.h>
#include <spa/param/video/format-utils.h>
#include <spa/param/param.h>
#include <spa/param/latency-utils.h>
#include <spa/control/control.h>
#include <spa/pod/filter.h>
@ -96,7 +97,8 @@ struct port {
#define PORT_IO 3
#define PORT_Format 4
#define PORT_Buffers 5
#define N_PORT_PARAMS 6
#define PORT_Latency 6
#define N_PORT_PARAMS 7
struct spa_param_info params[N_PORT_PARAMS];
uint32_t fmt_index = 0;
@ -114,6 +116,7 @@ struct port {
params[PORT_IO] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
params[PORT_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
params[PORT_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
params[PORT_Latency] = SPA_PARAM_INFO(SPA_PARAM_Latency, SPA_PARAM_INFO_READ);
info.flags = SPA_PORT_FLAG_LIVE | SPA_PORT_FLAG_PHYSICAL | SPA_PORT_FLAG_TERMINAL;
info.params = params;
@ -152,6 +155,8 @@ struct impl {
struct spa_io_position *position = nullptr;
struct spa_io_clock *clock = nullptr;
struct spa_latency_info latency[2];
std::shared_ptr<CameraManager> manager;
std::shared_ptr<Camera> camera;
@ -601,6 +606,15 @@ next:
return 0;
}
break;
case SPA_PARAM_Latency:
switch (result.index) {
case 0: case 1:
param = spa_latency_build(&b, id, &impl->latency[result.index]);
break;
default:
return 0;
}
break;
default:
return -ENOENT;
}
@ -961,6 +975,9 @@ impl::impl(spa_log *log, spa_loop *data_loop, spa_system *system,
info.flags = SPA_NODE_FLAG_RT;
info.params = params;
info.n_params = N_NODE_PARAMS;
latency[SPA_DIRECTION_INPUT] = SPA_LATENCY_INFO(SPA_DIRECTION_INPUT);
latency[SPA_DIRECTION_OUTPUT] = SPA_LATENCY_INFO(SPA_DIRECTION_OUTPUT);
}
static size_t