drivers/media/video/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@radix.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  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  22  *  02111-1307  USA
  23  */
  24
  25 u32 cx18_find_handle(struct cx18 *cx);
  26 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle);
  27 int cx18_streams_setup(struct cx18 *cx);
  28 int cx18_streams_register(struct cx18 *cx);
  29 void cx18_streams_cleanup(struct cx18 *cx, int unregister);
  30
  31 #define CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN (3)
  32 void cx18_stream_rotate_idx_mdls(struct cx18 *cx);
  33
  34 static inline bool cx18_stream_enabled(struct cx18_stream *s)
  35 {
  36         return s->video_dev || s->dvb.enabled ||
  37                (s->type == CX18_ENC_STREAM_TYPE_IDX &&
  38                 s->cx->stream_buffers[CX18_ENC_STREAM_TYPE_IDX] != 0);
  39 }
  40
  41 /* Related to submission of mdls to firmware */
  42 static inline void cx18_stream_load_fw_queue(struct cx18_stream *s)
  43 {
  44         struct cx18 *cx = s->cx;
  45         queue_work(cx->out_work_queue, &s->out_work_order);
  46 }
  47
  48 static inline void cx18_stream_put_mdl_fw(struct cx18_stream *s,
  49                                           struct cx18_mdl *mdl)
  50 {
  51         /* Put mdl on q_free; the out work handler will move mdl(s) to q_busy */
  52         cx18_enqueue(s, mdl, &s->q_free);
  53         cx18_stream_load_fw_queue(s);
  54 }
  55
  56 void cx18_out_work_handler(struct work_struct *work);
  57
  58 /* Capture related */
  59 int cx18_start_v4l2_encode_stream(struct cx18_stream *s);
  60 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end);
  61
  62 void cx18_stop_all_captures(struct cx18 *cx);