modules/access/v4l2/v4l2.h

   1 /*****************************************************************************
   2  * v4l2.h : Video4Linux2 input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002-2011 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #include <linux/videodev2.h>
  22
  23 /* libv4l2 functions */
  24 extern int v4l2_fd_open(int, int);
  25 extern int (*v4l2_close) (int);
  26 extern int (*v4l2_ioctl) (int, unsigned long int, ...);
  27 extern ssize_t (*v4l2_read) (int, void *, size_t);
  28 extern void * (*v4l2_mmap) (void *, size_t, int, int, int, int64_t);
  29 extern int (*v4l2_munmap) (void *, size_t);
  30
  31 #define CFG_PREFIX "v4l2-"
  32
  33 typedef struct vlc_v4l2_ctrl vlc_v4l2_ctrl_t;
  34
  35 struct buffer_t
  36 {
  37     void *  start;
  38     size_t  length;
  39 };
  40
  41 /* v4l2.c */
  42 void ParseMRL(vlc_object_t *, const char *);
  43 int OpenDevice (vlc_object_t *, const char *, uint32_t *);
  44 v4l2_std_id var_InheritStandard (vlc_object_t *, const char *);
  45
  46 /* video.c */
  47 int SetupInput (vlc_object_t *, int fd, v4l2_std_id *std);
  48 int SetupFormat (vlc_object_t *, int, uint32_t,
  49                  struct v4l2_format *, struct v4l2_streamparm *);
  50 #define SetupFormat(o,fd,fcc,fmt,p) \
  51         SetupFormat(VLC_OBJECT(o),fd,fcc,fmt,p)
  52 int SetupTuner (vlc_object_t *, int fd, uint32_t);
  53
  54 int StartUserPtr (vlc_object_t *, int);
  55 struct buffer_t *StartMmap (vlc_object_t *, int, uint32_t *);
  56 void StopMmap (int, struct buffer_t *, uint32_t);
  57
  58 mtime_t GetBufferPTS (const struct v4l2_buffer *);
  59 block_t* GrabVideo (vlc_object_t *, int, const struct buffer_t *);
  60
  61 #ifdef ZVBI_COMPILED
  62 /* vbi.c */
  63 typedef struct vlc_v4l2_vbi vlc_v4l2_vbi_t;
  64
  65 vlc_v4l2_vbi_t *OpenVBI (demux_t *, const char *);
  66 int GetFdVBI (vlc_v4l2_vbi_t *);
  67 void GrabVBI (demux_t *p_demux, vlc_v4l2_vbi_t *);
  68 void CloseVBI (vlc_v4l2_vbi_t *);
  69 #endif
  70
  71 /* demux.c */
  72 int DemuxOpen(vlc_object_t *);
  73 void DemuxClose(vlc_object_t *);
  74 float GetAbsoluteMaxFrameRate(vlc_object_t *, int fd, uint32_t fmt);
  75 void GetMaxDimensions(vlc_object_t *, int fd, uint32_t fmt, float fps_min,
  76                       uint32_t *pwidth, uint32_t *pheight);
  77
  78 /* access.c */
  79 int AccessOpen(vlc_object_t *);
  80 void AccessClose(vlc_object_t *);
  81
  82 /* radio.c */
  83 int RadioOpen(vlc_object_t *);
  84 void RadioClose(vlc_object_t *);
  85
  86 /* controls.c */
  87 vlc_v4l2_ctrl_t *ControlsInit(vlc_object_t *, int fd);
  88 void ControlsDeinit(vlc_object_t *, vlc_v4l2_ctrl_t *);