mirror of
https://github.com/mpv-player/mpv
synced 2024-10-30 04:46:41 +01:00
befc528297
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@28481 b3059339-0415-0410-9bf9-f77b7e298cf2
142 lines
6.7 KiB
C
142 lines
6.7 KiB
C
/*
|
|
* MJPEG API extensions for the Video4Linux API, first introduced by the
|
|
* Iomega Buz driver by Rainer Johanni <rainer@johanni.de>.
|
|
*
|
|
* This file is part of MPlayer.
|
|
*
|
|
* MPlayer is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* MPlayer is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef MPLAYER_VIDEODEV_MJPEG_H
|
|
#define MPLAYER_VIDEODEV_MJPEG_H
|
|
|
|
#include <stdlib.h>
|
|
|
|
/* This is identical with the mgavideo internal params struct,
|
|
please tell me if you change this struct here ! <gz@lysator.liu.se) */
|
|
struct mjpeg_params
|
|
{
|
|
|
|
/* The following parameters can only be queried */
|
|
|
|
int major_version; /* Major version number of driver */
|
|
int minor_version; /* Minor version number of driver */
|
|
|
|
/* Main control parameters */
|
|
|
|
int input; /* Input channel: 0 = Composite, 1 = S-VHS */
|
|
int norm; /* Norm: VIDEO_MODE_PAL or VIDEO_MODE_NTSC */
|
|
int decimation; /* decimation of captured video,
|
|
enlargement of video played back.
|
|
Valid values are 1, 2, 4 or 0.
|
|
0 is a special value where the user
|
|
has full control over video scaling */
|
|
|
|
/* The following parameters only have to be set if decimation==0,
|
|
for other values of decimation they provide the data how the image is captured */
|
|
|
|
int HorDcm; /* Horizontal decimation: 1, 2 or 4 */
|
|
int VerDcm; /* Vertical decimation: 1 or 2 */
|
|
int TmpDcm; /* Temporal decimation: 1 or 2,
|
|
if TmpDcm==2 in capture every second frame is dropped,
|
|
in playback every frame is played twice */
|
|
int field_per_buff; /* Number of fields per buffer: 1 or 2 */
|
|
int img_x; /* start of image in x direction */
|
|
int img_y; /* start of image in y direction */
|
|
int img_width; /* image width BEFORE decimation,
|
|
must be a multiple of HorDcm*16 */
|
|
int img_height; /* image height BEFORE decimation,
|
|
must be a multiple of VerDcm*8 */
|
|
|
|
/* --- End of parameters for decimation==0 only --- */
|
|
|
|
/* JPEG control parameters */
|
|
|
|
int quality; /* Measure for quality of compressed images.
|
|
Scales linearly with the size of the compressed images.
|
|
Must be beetween 0 and 100, 100 is a compression
|
|
ratio of 1:4 */
|
|
|
|
int odd_even; /* Which field should come first ???
|
|
This is more aptly named "top_first",
|
|
i.e. (odd_even==1) --> top-field-first */
|
|
|
|
int APPn; /* Number of APP segment to be written, must be 0..15 */
|
|
int APP_len; /* Length of data in JPEG APPn segment */
|
|
char APP_data[60]; /* Data in the JPEG APPn segment. */
|
|
|
|
int COM_len; /* Length of data in JPEG COM segment */
|
|
char COM_data[60]; /* Data in JPEG COM segment */
|
|
|
|
unsigned long jpeg_markers; /* Which markers should go into the JPEG output.
|
|
Unless you exactly know what you do, leave them untouched.
|
|
Inluding less markers will make the resulting code
|
|
smaller, but there will be fewer aplications
|
|
which can read it.
|
|
The presence of the APP and COM marker is
|
|
influenced by APP0_len and COM_len ONLY! */
|
|
#define JPEG_MARKER_DHT (1<<3) /* Define Huffman Tables */
|
|
#define JPEG_MARKER_DQT (1<<4) /* Define Quantization Tables */
|
|
#define JPEG_MARKER_DRI (1<<5) /* Define Restart Interval */
|
|
#define JPEG_MARKER_COM (1<<6) /* Comment segment */
|
|
#define JPEG_MARKER_APP (1<<7) /* App segment, driver will allways use APP0 */
|
|
|
|
int VFIFO_FB; /* Flag for enabling Video Fifo Feedback.
|
|
If this flag is turned on and JPEG decompressing
|
|
is going to the screen, the decompress process
|
|
is stopped every time the Video Fifo is full.
|
|
This enables a smooth decompress to the screen
|
|
but the video output signal will get scrambled */
|
|
|
|
/* Misc */
|
|
|
|
char reserved[312]; /* Makes 512 bytes for this structure */
|
|
};
|
|
|
|
struct mjpeg_requestbuffers
|
|
{
|
|
unsigned long count; /* Number of buffers for MJPEG grabbing */
|
|
unsigned long size; /* Size PER BUFFER in bytes */
|
|
};
|
|
|
|
struct mjpeg_sync
|
|
{
|
|
unsigned long frame; /* Frame (0 - n) for double buffer */
|
|
unsigned long length; /* number of code bytes in buffer (capture only) */
|
|
unsigned long seq; /* frame sequence number */
|
|
struct timeval timestamp; /* timestamp */
|
|
};
|
|
|
|
struct mjpeg_status
|
|
{
|
|
int input; /* Input channel, has to be set prior to BUZIOC_G_STATUS */
|
|
int signal; /* Returned: 1 if valid video signal detected */
|
|
int norm; /* Returned: VIDEO_MODE_PAL or VIDEO_MODE_NTSC */
|
|
int color; /* Returned: 1 if color signal detected */
|
|
};
|
|
|
|
/*
|
|
Private IOCTL to set up for displaying MJPEG
|
|
*/
|
|
#define MJPIOC_G_PARAMS _IOR ('v', BASE_VIDIOCPRIVATE+0, struct mjpeg_params)
|
|
#define MJPIOC_S_PARAMS _IOWR('v', BASE_VIDIOCPRIVATE+1, struct mjpeg_params)
|
|
#define MJPIOC_REQBUFS _IOWR('v', BASE_VIDIOCPRIVATE+2, struct mjpeg_requestbuffers)
|
|
#define MJPIOC_QBUF_CAPT _IOW ('v', BASE_VIDIOCPRIVATE+3, int)
|
|
#define MJPIOC_QBUF_PLAY _IOW ('v', BASE_VIDIOCPRIVATE+4, int)
|
|
#define MJPIOC_SYNC _IOR ('v', BASE_VIDIOCPRIVATE+5, struct mjpeg_sync)
|
|
#define MJPIOC_G_STATUS _IOWR('v', BASE_VIDIOCPRIVATE+6, struct mjpeg_status)
|
|
|
|
#endif /* MPLAYER_VIDEODEV_MJPEG_H */
|