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

   1 /*
   2  *  cx18 init/start/stop/exit stream functions
   3  *
   4  *  Derived from ivtv-streams.h
   5  *
   6  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   7  *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  */
  19
  20 u32 cx18_find_handle(struct cx18 *cx);
  21 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle);
  22 int cx18_streams_setup(struct cx18 *cx);
  23 int cx18_streams_register(struct cx18 *cx);
  24 void cx18_streams_cleanup(struct cx18 *cx, int unregister);
  25
  26 #define CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN (3)
  27 void cx18_stream_rotate_idx_mdls(struct cx18 *cx);
  28
  29 static inline bool cx18_stream_enabled(struct cx18_stream *s)
  30 {
  31         return s->video_dev.v4l2_dev ||
  32                (s->dvb && s->dvb->enabled) ||
  33                (s->type == CX18_ENC_STREAM_TYPE_IDX &&
  34                 s->cx->stream_buffers[CX18_ENC_STREAM_TYPE_IDX] != 0);
  35 }
  36
  37 /* Related to submission of mdls to firmware */
  38 static inline void cx18_stream_load_fw_queue(struct cx18_stream *s)
  39 {
  40         schedule_work(&s->out_work_order);
  41 }
  42
  43 static inline void cx18_stream_put_mdl_fw(struct cx18_stream *s,
  44                                           struct cx18_mdl *mdl)
  45 {
  46         /* Put mdl on q_free; the out work handler will move mdl(s) to q_busy */
  47         cx18_enqueue(s, mdl, &s->q_free);
  48         cx18_stream_load_fw_queue(s);
  49 }
  50
  51 void cx18_out_work_handler(struct work_struct *work);
  52
  53 /* Capture related */
  54 int cx18_start_v4l2_encode_stream(struct cx18_stream *s);
  55 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end);
  56
  57 void cx18_stop_all_captures(struct cx18 *cx);