drivers/media/usb/pvrusb2/pvrusb2-std.h

Source file repositories/reference/linux-study-clean/drivers/media/usb/pvrusb2/pvrusb2-std.h

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/pvrusb2/pvrusb2-std.h
Extension
.h
Size
1092 bytes
Lines
30
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __PVRUSB2_STD_H
#define __PVRUSB2_STD_H

#include <linux/videodev2.h>

// Convert string describing one or more video standards into a mask of V4L
// standard bits.  Return true if conversion succeeds otherwise return
// false.  String is expected to be of the form: C1-x/y;C2-a/b where C1 and
// C2 are color system names (e.g. "PAL", "NTSC") and x, y, a, and b are
// modulation schemes (e.g. "M", "B", "G", etc).
int pvr2_std_str_to_id(v4l2_std_id *idPtr,const char *bufPtr,
		       unsigned int bufSize);

// Convert any arbitrary set of video standard bits into an unambiguous
// readable string.  Return value is the number of bytes consumed in the
// buffer.  The formatted string is of a form that can be parsed by our
// sibling std_std_to_id() function.
unsigned int pvr2_std_id_to_str(char *bufPtr, unsigned int bufSize,
				v4l2_std_id id);

// Return mask of which video standard bits are valid
v4l2_std_id pvr2_std_get_usable(void);

#endif /* __PVRUSB2_STD_H */

Annotation

Implementation Notes