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Linux/include/uapi/linux/dvb/video.h

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  1 /* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
  2 /*
  3  * video.h
  4  *
  5  * Copyright (C) 2000 Marcus Metzler <marcus@convergence.de>
  6  *                  & Ralph  Metzler <ralph@convergence.de>
  7  *                    for convergence integrated media GmbH
  8  *
  9  * This program is free software; you can redistribute it and/or
 10  * modify it under the terms of the GNU Lesser General Public License
 11  * as published by the Free Software Foundation; either version 2.1
 12  * of the License, or (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 Lesser 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  02111-1307, USA.
 22  *
 23  */
 24 
 25 #ifndef _UAPI_DVBVIDEO_H_
 26 #define _UAPI_DVBVIDEO_H_
 27 
 28 #include <linux/types.h>
 29 #ifndef __KERNEL__
 30 #include <time.h>
 31 #endif
 32 
 33 typedef enum {
 34         VIDEO_FORMAT_4_3,     /* Select 4:3 format */
 35         VIDEO_FORMAT_16_9,    /* Select 16:9 format. */
 36         VIDEO_FORMAT_221_1    /* 2.21:1 */
 37 } video_format_t;
 38 
 39 
 40 typedef enum {
 41         VIDEO_PAN_SCAN,       /* use pan and scan format */
 42         VIDEO_LETTER_BOX,     /* use letterbox format */
 43         VIDEO_CENTER_CUT_OUT  /* use center cut out format */
 44 } video_displayformat_t;
 45 
 46 typedef struct {
 47         int w;
 48         int h;
 49         video_format_t aspect_ratio;
 50 } video_size_t;
 51 
 52 typedef enum {
 53         VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */
 54         VIDEO_SOURCE_MEMORY /* If this source is selected, the stream
 55                                comes from the user through the write
 56                                system call */
 57 } video_stream_source_t;
 58 
 59 
 60 typedef enum {
 61         VIDEO_STOPPED, /* Video is stopped */
 62         VIDEO_PLAYING, /* Video is currently playing */
 63         VIDEO_FREEZED  /* Video is freezed */
 64 } video_play_state_t;
 65 
 66 
 67 /* Decoder commands */
 68 #define VIDEO_CMD_PLAY        (0)
 69 #define VIDEO_CMD_STOP        (1)
 70 #define VIDEO_CMD_FREEZE      (2)
 71 #define VIDEO_CMD_CONTINUE    (3)
 72 
 73 /* Flags for VIDEO_CMD_FREEZE */
 74 #define VIDEO_CMD_FREEZE_TO_BLACK       (1 << 0)
 75 
 76 /* Flags for VIDEO_CMD_STOP */
 77 #define VIDEO_CMD_STOP_TO_BLACK         (1 << 0)
 78 #define VIDEO_CMD_STOP_IMMEDIATELY      (1 << 1)
 79 
 80 /* Play input formats: */
 81 /* The decoder has no special format requirements */
 82 #define VIDEO_PLAY_FMT_NONE         (0)
 83 /* The decoder requires full GOPs */
 84 #define VIDEO_PLAY_FMT_GOP          (1)
 85 
 86 /* The structure must be zeroed before use by the application
 87    This ensures it can be extended safely in the future. */
 88 struct video_command {
 89         __u32 cmd;
 90         __u32 flags;
 91         union {
 92                 struct {
 93                         __u64 pts;
 94                 } stop;
 95 
 96                 struct {
 97                         /* 0 or 1000 specifies normal speed,
 98                            1 specifies forward single stepping,
 99                            -1 specifies backward single stepping,
100                            >1: playback at speed/1000 of the normal speed,
101                            <-1: reverse playback at (-speed/1000) of the normal speed. */
102                         __s32 speed;
103                         __u32 format;
104                 } play;
105 
106                 struct {
107                         __u32 data[16];
108                 } raw;
109         };
110 };
111 
112 /* FIELD_UNKNOWN can be used if the hardware does not know whether
113    the Vsync is for an odd, even or progressive (i.e. non-interlaced)
114    field. */
115 #define VIDEO_VSYNC_FIELD_UNKNOWN       (0)
116 #define VIDEO_VSYNC_FIELD_ODD           (1)
117 #define VIDEO_VSYNC_FIELD_EVEN          (2)
118 #define VIDEO_VSYNC_FIELD_PROGRESSIVE   (3)
119 
120 struct video_event {
121         __s32 type;
122 #define VIDEO_EVENT_SIZE_CHANGED        1
123 #define VIDEO_EVENT_FRAME_RATE_CHANGED  2
124 #define VIDEO_EVENT_DECODER_STOPPED     3
125 #define VIDEO_EVENT_VSYNC               4
126         /* unused, make sure to use atomic time for y2038 if it ever gets used */
127         long timestamp;
128         union {
129                 video_size_t size;
130                 unsigned int frame_rate;        /* in frames per 1000sec */
131                 unsigned char vsync_field;      /* unknown/odd/even/progressive */
132         } u;
133 };
134 
135 
136 struct video_status {
137         int                   video_blank;   /* blank video on freeze? */
138         video_play_state_t    play_state;    /* current state of playback */
139         video_stream_source_t stream_source; /* current source (demux/memory) */
140         video_format_t        video_format;  /* current aspect ratio of stream*/
141         video_displayformat_t display_format;/* selected cropping mode */
142 };
143 
144 
145 struct video_still_picture {
146         char __user *iFrame;        /* pointer to a single iframe in memory */
147         __s32 size;
148 };
149 
150 
151 typedef __u16 video_attributes_t;
152 /*   bits: descr. */
153 /*   15-14 Video compression mode (0=MPEG-1, 1=MPEG-2) */
154 /*   13-12 TV system (0=525/60, 1=625/50) */
155 /*   11-10 Aspect ratio (0=4:3, 3=16:9) */
156 /*    9- 8 permitted display mode on 4:3 monitor (0=both, 1=only pan-sca */
157 /*    7    line 21-1 data present in GOP (1=yes, 0=no) */
158 /*    6    line 21-2 data present in GOP (1=yes, 0=no) */
159 /*    5- 3 source resolution (0=720x480/576, 1=704x480/576, 2=352x480/57 */
160 /*    2    source letterboxed (1=yes, 0=no) */
161 /*    0    film/camera mode (0=
162  *camera, 1=film (625/50 only)) */
163 
164 
165 /* bit definitions for capabilities: */
166 /* can the hardware decode MPEG1 and/or MPEG2? */
167 #define VIDEO_CAP_MPEG1   1
168 #define VIDEO_CAP_MPEG2   2
169 /* can you send a system and/or program stream to video device?
170    (you still have to open the video and the audio device but only
171     send the stream to the video device) */
172 #define VIDEO_CAP_SYS     4
173 #define VIDEO_CAP_PROG    8
174 /* can the driver also handle SPU, NAVI and CSS encoded data?
175    (CSS API is not present yet) */
176 #define VIDEO_CAP_SPU    16
177 #define VIDEO_CAP_NAVI   32
178 #define VIDEO_CAP_CSS    64
179 
180 
181 #define VIDEO_STOP                 _IO('o', 21)
182 #define VIDEO_PLAY                 _IO('o', 22)
183 #define VIDEO_FREEZE               _IO('o', 23)
184 #define VIDEO_CONTINUE             _IO('o', 24)
185 #define VIDEO_SELECT_SOURCE        _IO('o', 25)
186 #define VIDEO_SET_BLANK            _IO('o', 26)
187 #define VIDEO_GET_STATUS           _IOR('o', 27, struct video_status)
188 #define VIDEO_GET_EVENT            _IOR('o', 28, struct video_event)
189 #define VIDEO_SET_DISPLAY_FORMAT   _IO('o', 29)
190 #define VIDEO_STILLPICTURE         _IOW('o', 30, struct video_still_picture)
191 #define VIDEO_FAST_FORWARD         _IO('o', 31)
192 #define VIDEO_SLOWMOTION           _IO('o', 32)
193 #define VIDEO_GET_CAPABILITIES     _IOR('o', 33, unsigned int)
194 #define VIDEO_CLEAR_BUFFER         _IO('o',  34)
195 #define VIDEO_SET_STREAMTYPE       _IO('o', 36)
196 #define VIDEO_SET_FORMAT           _IO('o', 37)
197 #define VIDEO_GET_SIZE             _IOR('o', 55, video_size_t)
198 
199 /**
200  * VIDEO_GET_PTS
201  *
202  * Read the 33 bit presentation time stamp as defined
203  * in ITU T-REC-H.222.0 / ISO/IEC 13818-1.
204  *
205  * The PTS should belong to the currently played
206  * frame if possible, but may also be a value close to it
207  * like the PTS of the last decoded frame or the last PTS
208  * extracted by the PES parser.
209  */
210 #define VIDEO_GET_PTS              _IOR('o', 57, __u64)
211 
212 /* Read the number of displayed frames since the decoder was started */
213 #define VIDEO_GET_FRAME_COUNT      _IOR('o', 58, __u64)
214 
215 #define VIDEO_COMMAND              _IOWR('o', 59, struct video_command)
216 #define VIDEO_TRY_COMMAND          _IOWR('o', 60, struct video_command)
217 
218 #endif /* _UAPI_DVBVIDEO_H_ */
219 

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