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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Collabora Ltd.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
*
* gstlibcamerapad.cpp - GStreamer Capture Pad
*/
#include "gstlibcamerapad.h"
#include <libcamera/stream.h>
#include "gstlibcamera-utils.h"
using namespace libcamera;
struct _GstLibcameraPad {
GstPad parent;
StreamRole role;
GstLibcameraPool *pool;
GQueue pending_buffers;
GstClockTime latency;
};
enum {
PROP_0,
PROP_STREAM_ROLE
};
G_DEFINE_TYPE(GstLibcameraPad, gst_libcamera_pad, GST_TYPE_PAD)
static void
gst_libcamera_pad_set_property(GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
auto *self = GST_LIBCAMERA_PAD(object);
GLibLocker lock(GST_OBJECT(self));
switch (prop_id) {
case PROP_STREAM_ROLE:
self->role = (StreamRole)g_value_get_enum(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_libcamera_pad_get_property(GObject *object, guint prop_id, GValue *value,
GParamSpec *pspec)
{
auto *self = GST_LIBCAMERA_PAD(object);
GLibLocker lock(GST_OBJECT(self));
switch (prop_id) {
case PROP_STREAM_ROLE:
g_value_set_enum(value, self->role);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static gboolean
gst_libcamera_pad_query(GstPad *pad, GstObject *parent, GstQuery *query)
{
auto *self = GST_LIBCAMERA_PAD(pad);
if (query->type != GST_QUERY_LATENCY)
return gst_pad_query_default(pad, parent, query);
/* TRUE here means live, we assumes that max latency is the same as min
* as we have no idea that duration of frames. */
gst_query_set_latency(query, TRUE, self->latency, self->latency);
return TRUE;
}
static void
gst_libcamera_pad_init(GstLibcameraPad *self)
{
GST_PAD_QUERYFUNC(self) = gst_libcamera_pad_query;
}
static GType
gst_libcamera_stream_role_get_type()
{
static GType type = 0;
static const GEnumValue values[] = {
{ StillCapture, "libcamera::StillCapture", "still-capture" },
{ VideoRecording, "libcamera::VideoRecording", "video-recording" },
{ Viewfinder, "libcamera::Viewfinder", "view-finder" },
{ 0, NULL, NULL }
};
if (!type)
type = g_enum_register_static("GstLibcameraStreamRole", values);
return type;
}
static void
gst_libcamera_pad_class_init(GstLibcameraPadClass *klass)
{
auto *object_class = G_OBJECT_CLASS(klass);
object_class->set_property = gst_libcamera_pad_set_property;
object_class->get_property = gst_libcamera_pad_get_property;
auto *spec = g_param_spec_enum("stream-role", "Stream Role",
"The selected stream role",
gst_libcamera_stream_role_get_type(),
VideoRecording,
(GParamFlags)(GST_PARAM_MUTABLE_READY
| G_PARAM_CONSTRUCT
| G_PARAM_READWRITE
| G_PARAM_STATIC_STRINGS));
g_object_class_install_property(object_class, PROP_STREAM_ROLE, spec);
}
StreamRole
gst_libcamera_pad_get_role(GstPad *pad)
{
auto *self = GST_LIBCAMERA_PAD(pad);
GLibLocker lock(GST_OBJECT(self));
return self->role;
}
GstLibcameraPool *
gst_libcamera_pad_get_pool(GstPad *pad)
{
auto *self = GST_LIBCAMERA_PAD(pad);
return self->pool;
}
void
gst_libcamera_pad_set_pool(GstPad *pad, GstLibcameraPool *pool)
{
auto *self = GST_LIBCAMERA_PAD(pad);
if (self->pool)
g_object_unref(self->pool);
self->pool = pool;
}
Stream *
gst_libcamera_pad_get_stream(GstPad *pad)
{
auto *self = GST_LIBCAMERA_PAD(pad);
if (self->pool)
return gst_libcamera_pool_get_stream(self->pool);
return nullptr;
}
void
gst_libcamera_pad_queue_buffer(GstPad *pad, GstBuffer *buffer)
{
auto *self = GST_LIBCAMERA_PAD(pad);
GLibLocker lock(GST_OBJECT(self));
g_queue_push_head(&self->pending_buffers, buffer);
}
GstFlowReturn
gst_libcamera_pad_push_pending(GstPad *pad)
{
auto *self = GST_LIBCAMERA_PAD(pad);
GstBuffer *buffer;
{
GLibLocker lock(GST_OBJECT(self));
buffer = GST_BUFFER(g_queue_pop_tail(&self->pending_buffers));
}
if (!buffer)
return GST_FLOW_OK;
return gst_pad_push(pad, buffer);
}
bool
gst_libcamera_pad_has_pending(GstPad *pad)
{
auto *self = GST_LIBCAMERA_PAD(pad);
GLibLocker lock(GST_OBJECT(self));
return self->pending_buffers.length > 0;
}
void
gst_libcamera_pad_set_latency(GstPad *pad, GstClockTime latency)
{
auto *self = GST_LIBCAMERA_PAD(pad);
GLibLocker lock(GST_OBJECT(self));
self->latency = latency;
}
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