drivers/media/test-drivers/vidtv/vidtv_s302m.c

Source file repositories/reference/linux-study-clean/drivers/media/test-drivers/vidtv/vidtv_s302m.c

File Facts

System: Linux kernel
Corpus path: drivers/media/test-drivers/vidtv/vidtv_s302m.c
Extension: .c
Size: 15183 bytes
Lines: 525
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.
Allocates kernel memory; connect allocation flags and lifetime to context constraints.
Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

linux/bug.h
linux/crc32.h
linux/fixp-arith.h
linux/jiffies.h
linux/kernel.h
linux/math64.h
linux/printk.h
linux/ratelimit.h
linux/slab.h
linux/string.h
linux/types.h
linux/vmalloc.h
vidtv_common.h
vidtv_encoder.h
vidtv_s302m.h

Detected Declarations

struct tone_duration
function vidtv_s302m_access_unit_destroy
function vidtv_s302m_alloc_au
function vidtv_s302m_compute_sample_count_from_video
function vidtv_s302m_compute_pts_from_video
function vidtv_s302m_get_sample
function vidtv_s302m_write_frame
function vidtv_s302m_write_h
function vidtv_s302m_write_frames
function vidtv_s302m_clear
function vidtv_s302m_encoder_destroy

Annotated Snippet

struct tone_duration {
	enum musical_notes note;
	int duration;
};

#define COMPASS 100 /* beats per minute */
static const struct tone_duration beethoven_fur_elise[] = {
	{ NOTE_SILENT, 512},
	{ NOTE_E_6, 128},  { NOTE_DS_6, 128}, { NOTE_E_6, 128},
	{ NOTE_DS_6, 128}, { NOTE_E_6, 128},  { NOTE_B_5, 128},
	{ NOTE_D_6, 128},  { NOTE_C_6, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_C_5, 128},
	{ NOTE_E_5, 128},  { NOTE_A_5, 128},  { NOTE_E_3, 128},
	{ NOTE_E_4, 128},  { NOTE_GS_4, 128}, { NOTE_E_5, 128},
	{ NOTE_GS_5, 128}, { NOTE_B_5, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_E_5, 128},
	{ NOTE_E_6, 128},  { NOTE_DS_6, 128}, { NOTE_E_6, 128},
	{ NOTE_DS_6, 128}, { NOTE_E_6, 128},  { NOTE_B_5, 128},
	{ NOTE_D_6, 128},  { NOTE_C_6, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_C_5, 128},
	{ NOTE_E_5, 128},  { NOTE_A_5, 128},  { NOTE_E_3, 128},
	{ NOTE_E_4, 128},  { NOTE_GS_4, 128}, { NOTE_E_5, 128},
	{ NOTE_C_6, 128},  { NOTE_B_5, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_SILENT, 128},

	{ NOTE_E_6, 128},  { NOTE_DS_6, 128}, { NOTE_E_6, 128},
	{ NOTE_DS_6, 128}, { NOTE_E_6, 128},  { NOTE_B_5, 128},
	{ NOTE_D_6, 128},  { NOTE_C_6, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_C_5, 128},
	{ NOTE_E_5, 128},  { NOTE_A_5, 128},  { NOTE_E_3, 128},
	{ NOTE_E_4, 128},  { NOTE_GS_4, 128}, { NOTE_E_5, 128},
	{ NOTE_GS_5, 128}, { NOTE_B_5, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_E_5, 128},
	{ NOTE_E_6, 128},  { NOTE_DS_6, 128}, { NOTE_E_6, 128},
	{ NOTE_DS_6, 128}, { NOTE_E_6, 128},  { NOTE_B_5, 128},
	{ NOTE_D_6, 128},  { NOTE_C_6, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_C_5, 128},
	{ NOTE_E_5, 128},  { NOTE_A_5, 128},  { NOTE_E_3, 128},
	{ NOTE_E_4, 128},  { NOTE_GS_4, 128}, { NOTE_E_5, 128},
	{ NOTE_C_6, 128},  { NOTE_B_5, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_B_4, 128},
	{ NOTE_C_5, 128},  { NOTE_D_5, 128},  { NOTE_C_4, 128},
	{ NOTE_G_4, 128},  { NOTE_C_5, 128},  { NOTE_G_4, 128},
	{ NOTE_F_5, 128},  { NOTE_E_5, 128},  { NOTE_G_3, 128},
	{ NOTE_G_4, 128},  { NOTE_B_3, 128},  { NOTE_F_4, 128},
	{ NOTE_E_5, 128},  { NOTE_D_5, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_E_4, 128},
	{ NOTE_D_5, 128},  { NOTE_C_5, 128},  { NOTE_E_3, 128},
	{ NOTE_E_4, 128},  { NOTE_E_5, 128},  { NOTE_E_5, 128},
	{ NOTE_E_6, 128},  { NOTE_E_5, 128},  { NOTE_E_6, 128},
	{ NOTE_E_5, 128},  { NOTE_E_5, 128},  { NOTE_DS_5, 128},
	{ NOTE_E_5, 128},  { NOTE_DS_6, 128}, { NOTE_E_6, 128},
	{ NOTE_DS_5, 128}, { NOTE_E_5, 128},  { NOTE_DS_6, 128},
	{ NOTE_E_6, 128},  { NOTE_DS_6, 128}, { NOTE_E_6, 128},
	{ NOTE_DS_6, 128}, { NOTE_E_6, 128},  { NOTE_B_5, 128},
	{ NOTE_D_6, 128},  { NOTE_C_6, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_C_5, 128},
	{ NOTE_E_5, 128},  { NOTE_A_5, 128},  { NOTE_E_3, 128},
	{ NOTE_E_4, 128},  { NOTE_GS_4, 128}, { NOTE_E_5, 128},
	{ NOTE_GS_5, 128}, { NOTE_B_5, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_E_5, 128},
	{ NOTE_E_6, 128},  { NOTE_DS_6, 128}, { NOTE_E_6, 128},
	{ NOTE_DS_6, 128}, { NOTE_E_6, 128},  { NOTE_B_5, 128},
	{ NOTE_D_6, 128},  { NOTE_C_6, 128},  { NOTE_A_3, 128},
	{ NOTE_E_4, 128},  { NOTE_A_4, 128},  { NOTE_C_5, 128},
	{ NOTE_E_5, 128},  { NOTE_A_5, 128},  { NOTE_E_3, 128},
	{ NOTE_E_4, 128},  { NOTE_GS_4, 128}, { NOTE_E_5, 128},
	{ NOTE_C_6, 128},  { NOTE_B_5, 128},  { NOTE_A_5, 512},
	{ NOTE_SILENT, 256},
};

static struct vidtv_access_unit *vidtv_s302m_access_unit_init(struct vidtv_access_unit *head)
{
	struct vidtv_access_unit *au;

	au = kzalloc_obj(*au);
	if (!au)
		return NULL;

	if (head) {
		while (head->next)
			head = head->next;

		head->next = au;
	}

	return au;
}

static void vidtv_s302m_access_unit_destroy(struct vidtv_encoder *e)

Annotation

Immediate include surface: `linux/bug.h`, `linux/crc32.h`, `linux/fixp-arith.h`, `linux/jiffies.h`, `linux/kernel.h`, `linux/math64.h`, `linux/printk.h`, `linux/ratelimit.h`.
Detected declarations: `struct tone_duration`, `function vidtv_s302m_access_unit_destroy`, `function vidtv_s302m_alloc_au`, `function vidtv_s302m_compute_sample_count_from_video`, `function vidtv_s302m_compute_pts_from_video`, `function vidtv_s302m_get_sample`, `function vidtv_s302m_write_frame`, `function vidtv_s302m_write_h`, `function vidtv_s302m_write_frames`, `function vidtv_s302m_clear`.
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.