source/dvr_dec_ioctl.h File Reference

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Defines
#define	DVR_DEC_IOC_MAGIC   'H'
#define	DVR_DEC_SET_CHANNEL_PARAM   _IOWR(DVR_DEC_IOC_MAGIC, 2, dvr_dec_channel_param)
#define	DVR_DEC_GET_CHANNEL_PARAM   _IO(DVR_DEC_IOC_MAGIC, 3)
#define	DVR_DEC_QUEUE_GET   _IOWR(DVR_DEC_IOC_MAGIC, 5, dvr_dec_queue_get)
#define	DVR_DEC_QUEUE_PUT   _IOWR(DVR_DEC_IOC_MAGIC, 6, dvr_dec_queue_get)
#define	DVR_DEC_CONTROL   _IOW(DVR_DEC_IOC_MAGIC, 7, dvr_dec_control)
#define	DVR_DEC_QUERY_OUTPUT_BUFFER_SIZE   _IOWR(DVR_DEC_IOC_MAGIC, 8, int)
#define	DVR_DEC_CLEAR_WIN   _IOW(DVR_DEC_IOC_MAGIC, 18, dvr_dec_clear_param)
#define	DVR_DEC_CLEAR_WIN2   _IOW(DVR_DEC_IOC_MAGIC, 19, dvr_dec_clear_param)

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Define Documentation

#define DVR_DEC_IOC_MAGIC   'H'

Definition at line 2 of file dvr_dec_ioctl.h.

#define DVR_DEC_SET_CHANNEL_PARAM   _IOWR(DVR_DEC_IOC_MAGIC, 2, dvr_dec_channel_param)

ioctl(dec_fd, DVR_DEC_SET_CHANNEL_PARAM, &ch_param)

• explanation : get channel parameter from user space ,and set parameter to device driver
• parameter :
  pointer ch_param : argument from user space ioctl parameter, it means structure dvr_dec_channel_param

Examples:

2ch_playback.c, and playback.c.

Definition at line 12 of file dvr_dec_ioctl.h.

#define DVR_DEC_GET_CHANNEL_PARAM   _IO(DVR_DEC_IOC_MAGIC, 3)

ioctl(dec_fd, DVR_DEC_GET_CHANNEL_PARAM, &ch_param)

• explanation : get channel parameter from user space
• parameter :
  pointer ch_param : argument from user space ioctl parameter, it means structure dvr_dec_channel_param

Definition at line 21 of file dvr_dec_ioctl.h.

#define DVR_DEC_QUEUE_GET   _IOWR(DVR_DEC_IOC_MAGIC, 5, dvr_dec_queue_get)

ioctl(dec_fd, DVR_DEC_QUEUE_GET, &data)

• explanation : Get buffer to user space. It includes the buffer length, offset.
• parameter :
  pointer data : argument from user space ioctl parameter, it means structure dvr_dec_queue_get

Examples:

2ch_playback.c, and playback.c.

Definition at line 30 of file dvr_dec_ioctl.h.

#define DVR_DEC_QUEUE_PUT   _IOWR(DVR_DEC_IOC_MAGIC, 6, dvr_dec_queue_get)

ioctl(dec_fd, DVR_DEC_QUEUE_PUT, &data)

• explanation : get buffer from user space, and release buffer at videograph layer
• parameter :
  pointer data : argument from user space ioctl parameter, it means structure dvr_dec_queue_get

Examples:

2ch_playback.c, and playback.c.

Definition at line 39 of file dvr_dec_ioctl.h.

#define DVR_DEC_CONTROL   _IOW(DVR_DEC_IOC_MAGIC, 7, dvr_dec_control)

ioctl(dec_fd, DVR_DEC_CONTROL, &dec_ctrl)

• explanation : get decode contorl command from user space, and set command to videograph layer
• parameter :
  pointer dec_ctrl : argument from user space ioctl parameter, it means structure dvr_dec_control

Examples:

2ch_playback.c, and playback.c.

Definition at line 48 of file dvr_dec_ioctl.h.

#define DVR_DEC_QUERY_OUTPUT_BUFFER_SIZE   _IOWR(DVR_DEC_IOC_MAGIC, 8, int)

ioctl(dec_fd, DVR_DEC_QUERY_OUTPUT_BUFFER_SIZE, &dec_buf_size)

• explanation : get output buffer size for dvr decode to user space.
• parameter :
  pointer dec_buf_size : argument from user space ioctl parameter, it means request buffer size.

Examples:

2ch_playback.c, and playback.c.

Definition at line 57 of file dvr_dec_ioctl.h.

#define DVR_DEC_CLEAR_WIN   _IOW(DVR_DEC_IOC_MAGIC, 18, dvr_dec_clear_param)

ioctl(dec_fd, DVR_DEC_CLEAR_WIN, &dec_clear_param)

• explanation : to prevent lcd unexpected image, when stop playback, then start another playback,
  use flow : ioctl(dvr_fd,DVR_COMMON_APPLY,&data); //stop current playback
  ................
  ioctl(dec_fd,DVR_DEC_CLEAR_WIN,&data); //must after stop, and before start apply
  ioctl(dvr_fd,DVR_COMMON_APPLY,&data); //start new playback
• parameter :
  pointer dec_clear_param : argument from user space ioctl parameter, it means structure dvr_dec_clear_param.

Definition at line 71 of file dvr_dec_ioctl.h.

#define DVR_DEC_CLEAR_WIN2   _IOW(DVR_DEC_IOC_MAGIC, 19, dvr_dec_clear_param)

ioctl(dec_fd, DVR_DEC_CLEAR_WIN2, &dec_clear_param)

• explanation : to prevent lcd unexpected image, when update current playback
  use flow : dec_ctrl.command = DEC_UPDATE;
  ioctl(dec_fd, DVR_DEC_CONTROL, &dec_ctrl);
  ioctl(dec_fd, DVR_DEC_CLEAR_WIN2, &data); // tell VG to clear buffer after apply
  ioctl(dvr_fd, DVR_COMMON_APPLY, &data);
• parameter :
  pointer dec_clear_param : argument from user space ioctl parameter, it means structure dvr_dec_clear_param.

Definition at line 85 of file dvr_dec_ioctl.h.