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ea2764aa69
Currently the uvcsink is only capable to run in an application that is handling the state transitions of the pipeline properly by checking on streaming event from the uvcsink. This code is improving the element by adding an fakesink to consume possible videostream flow in case the pipeline state is not changing on hosts streamoff. This is helpfull when using local gst-launch pipelines where the streaming event is not monitored to change the pipelines state. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1304>
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/*
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* SPDX-License-Identifier: LGPL-2.0-or-later
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*
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* Copyright (C) 2023 Pengutronix e.K. - www.pengutronix.de
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*
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*/
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#pragma once
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#include "linux/usb/g_uvc.h"
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#include "linux/usb/video.h"
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#include "linux/videodev2.h"
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#include <gst/gst.h>
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#include "configfs.h"
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G_BEGIN_DECLS GST_DEBUG_CATEGORY_EXTERN (uvcsink_debug);
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#define GST_TYPE_UVCSINK (gst_uvc_sink_get_type())
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G_DECLARE_FINAL_TYPE (GstUvcSink, gst_uvc_sink, GST, UVCSINK, GstBin)
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GST_ELEMENT_REGISTER_DECLARE (uvcsink);
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struct _GstUvcSink
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{
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GstBin bin;
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GstElement *fakesink;
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GstElement *v4l2sink;
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GstPad *sinkpad;
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GstPad *fakesinkpad;
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GstPad *v4l2sinkpad;
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/* streaming status */
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gboolean streaming;
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GstCaps *probed_caps;
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GstCaps *cur_caps;
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/* a poll for video_fd */
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GstPoll *poll;
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GstPollFD pollfd;
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struct uvc_function_config *fc;
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struct {
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int bFrameIndex;
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int bFormatIndex;
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unsigned int dwFrameInterval;
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} cur;
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struct uvc_streaming_control probe;
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struct uvc_streaming_control commit;
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int control;
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/* probes */
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int buffer_peer_probe_id;
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int idle_probe_id;
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GstClock *v4l2_clock;
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int caps_changed;
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int streamon;
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int streamoff;
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};
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#define UVCSINK_MSG_LOCK(v) g_mutex_lock(&(v)->msg_lock)
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#define UVCSINK_MSG_UNLOCK(v) g_mutex_unlock(&(v)->msg_lock)
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int uvc_events_process_data(GstUvcSink * self,
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const struct uvc_request_data *data);
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int uvc_events_process_setup(GstUvcSink * self,
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const struct usb_ctrlrequest *ctrl,
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struct uvc_request_data *resp);
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int uvc_fill_streaming_control(GstUvcSink * self,
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struct uvc_streaming_control *ctrl,
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int iframe, int iformat, unsigned int dwival);
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G_END_DECLS
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