LXR linux/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 */
  33struct 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
  40int vimc_streamer_s_stream(struct vimc_stream *stream,
  41                           struct vimc_ent_device *ved,
  42                           int enable);
  43
  44#endif  //_VIMC_STREAMER_H_
  45