1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * vimc-streamer.h Virtual Media Controller Driver
4  *
5  * Copyright (C) 2018 Lucas A. M. Magalhães <lucmaga@gmail.com>
6  *
7  */
8 
9 #ifndef _VIMC_STREAMER_H_
10 #define _VIMC_STREAMER_H_
11 
12 #include <media/media-device.h>
13 
14 #include "vimc-common.h"
15 
16 #define VIMC_STREAMER_PIPELINE_MAX_SIZE 16
17 
18 /**
19  * struct vimc_stream - struct that represents a stream in the pipeline
20  *
21  * @pipe:		the media pipeline object associated with this stream
22  * @ved_pipeline:	array containing all the entities participating in the
23  * 			stream. The order is from a video device (usually a
24  *			capture device) where stream_on was called, to the
25  *			entity generating the first base image to be
26  *			processed in the pipeline.
27  * @pipe_size:		size of @ved_pipeline
28  * @kthread:		thread that generates the frames of the stream.
29  *
30  * When the user call stream_on in a video device, struct vimc_stream is
31  * used to keep track of all entities and subdevices that generates and
32  * process frames for the stream.
33  */
34 struct vimc_stream {
35 	struct media_pipeline pipe;
36 	struct vimc_ent_device *ved_pipeline[VIMC_STREAMER_PIPELINE_MAX_SIZE];
37 	unsigned int pipe_size;
38 	struct task_struct *kthread;
39 };
40 
41 int vimc_streamer_s_stream(struct vimc_stream *stream,
42 			   struct vimc_ent_device *ved,
43 			   int enable);
44 
45 #endif  //_VIMC_STREAMER_H_
46