drivers/media/platform/vimc/vimc-streamer.h

   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 capture device) where
  24  * stream_on was called, to the entity generating the first base image to be
  25  * processed in the pipeline.
  26  * @pipe_size:          size of @ved_pipeline
  27  * @kthread:            thread that generates the frames of the stream.
  28  *
  29  * When the user call stream_on in a video device, struct vimc_stream is
  30  * used to keep track of all entities and subdevices that generates and
  31  * process frames for the stream.
  32  */
  33 struct vimc_stream {
  34         struct media_pipeline pipe;
  35         struct vimc_ent_device *ved_pipeline[VIMC_STREAMER_PIPELINE_MAX_SIZE];
  36         unsigned int pipe_size;
  37         struct task_struct *kthread;
  38 };
  39
  40 int vimc_streamer_s_stream(struct vimc_stream *stream,
  41                            struct vimc_ent_device *ved,
  42                            int enable);
  43
  44 #endif  //_VIMC_STREAMER_H_