drivers/media/pci/cx18/cx18-streams.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  cx18 init/start/stop/exit stream functions
   4  *
   5  *  Derived from ivtv-streams.h
   6  *
   7  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   8  *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
   9  */
  10
  11 u32 cx18_find_handle(struct cx18 *cx);
  12 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle);
  13 int cx18_streams_setup(struct cx18 *cx);
  14 int cx18_streams_register(struct cx18 *cx);
  15 void cx18_streams_cleanup(struct cx18 *cx, int unregister);
  16
  17 #define CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN (3)
  18 void cx18_stream_rotate_idx_mdls(struct cx18 *cx);
  19
  20 static inline bool cx18_stream_enabled(struct cx18_stream *s)
  21 {
  22         return s->video_dev.v4l2_dev ||
  23                (s->dvb && s->dvb->enabled) ||
  24                (s->type == CX18_ENC_STREAM_TYPE_IDX &&
  25                 s->cx->stream_buffers[CX18_ENC_STREAM_TYPE_IDX] != 0);
  26 }
  27
  28 /* Related to submission of mdls to firmware */
  29 static inline void cx18_stream_load_fw_queue(struct cx18_stream *s)
  30 {
  31         schedule_work(&s->out_work_order);
  32 }
  33
  34 static inline void cx18_stream_put_mdl_fw(struct cx18_stream *s,
  35                                           struct cx18_mdl *mdl)
  36 {
  37         /* Put mdl on q_free; the out work handler will move mdl(s) to q_busy */
  38         cx18_enqueue(s, mdl, &s->q_free);
  39         cx18_stream_load_fw_queue(s);
  40 }
  41
  42 void cx18_out_work_handler(struct work_struct *work);
  43
  44 /* Capture related */
  45 int cx18_start_v4l2_encode_stream(struct cx18_stream *s);
  46 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end);
  47
  48 void cx18_stop_all_captures(struct cx18 *cx);