drivers/media/usb/pwc/pwc-dec1.c

File Facts

System

Linux kernel

Corpus path

drivers/media/usb/pwc/pwc-dec1.c

Extension

.c

Size

699 bytes

Lines

21

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.

• 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• pwc.h

Detected Declarations

• function pwc_dec1_init

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/* Linux driver for Philips webcam
   Decompression for chipset version 1
   (C) 2004-2006 Luc Saillard (luc@saillard.org)

   NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
   driver and thus may have bugs that are not present in the original version.
   Please send bug reports and support requests to <luc@saillard.org>.
   The decompression routines have been implemented by reverse-engineering the
   Nemosoft binary pwcx module. Caveat emptor.

*/
#include "pwc.h"

void pwc_dec1_init(struct pwc_device *pdev, const unsigned char *cmd)
{
	struct pwc_dec1_private *pdec = &pdev->dec1;

	pdec->version = pdev->release;
}

Annotation

• Immediate include surface: `pwc.h`.
• Detected declarations: `function pwc_dec1_init`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.