main.c File Reference

On-target WebP decode smoke test (ra8_webp over vendored libwebp). More...

#include <stdint.h>
#include "ra8_board_ek_ra8d2.h"
#include "ra8_boot_entry.h"
#include "ra8_cgc.h"
#include "ra8_err.h"
#include "ra8_mstp.h"
#include "ra8_time.h"
#include "ra8_webp.h"
#include "ra8_webp_arena.h"

Include dependency graph for main.c:

Go to the source code of this file.

Enumerations
enum	webp_demo_consts_t : uint32_t {   k_webp_demo_baud = 115200U ,   k_webp_demo_dim = 8U ,   k_webp_demo_bpp = 4U ,   k_webp_demo_stride = k_webp_demo_dim * k_webp_demo_bpp ,   k_webp_demo_fb_bytes = k_webp_demo_dim * k_webp_demo_stride ,   k_webp_demo_scratch = 256U * 1024U ,   k_webp_demo_probe_r = 32U ,   k_webp_demo_probe_a = 255U }
	Fixed geometry + buffer sizes for the baked 8x8 fixture. More...

Functions
static void	webp_demo_panic_halt (void)
	Park the CPU forever after a fatal init failure.
static void	webp_demo_setup_or_halt (void)
	Bring CGC + module-stop + SysTick + console up, or panic-halt.
static bool	webp_demo_decode_ok (void)
	Decode the baked fixture and confirm a known pixel round-trips.
void	main (void)
	Application entry point.

Variables
static const uint8_t	k_webp_lossless []
	8x8 VP8L (lossless, -exact) fixture – see tests/fixtures/webp/README.md.
static const uint8_t	k_webp_demo_pass [] = "webp: PASS 8x8\r\n"
	PASS banner (HIL scrape target).
static const uint8_t	k_webp_demo_fail [] = "webp: FAIL\r\n"
	FAIL banner (HIL scrape target).
static uint8_t	s_webp_demo_scratch [k_webp_demo_scratch]
	Decode arena backing store (static SRAM, NASA P10 Rule 3).
static uint8_t	s_webp_demo_fb [k_webp_demo_fb_bytes]
	Decoded RGBA8888 output framebuffer.

Detailed Description

On-target WebP decode smoke test (ra8_webp over vendored libwebp).

Tag

[Ring 6 / APP] {World: S}

Stand-alone EK-RA8D2 application that proves the vendored libwebp decoder (apps/shared_libs/third_party/libwebp) and the ra8_webp facade cross-compile, link, and run on the Cortex-M85 – decoding with zero heap through the ra8_webp bump arena (_sbrk traps after init).

A tiny 8x8 lossless (VP8L) WebP is baked into the image (k_webp_lossless, the same fixture as tests/fixtures/webp/fixture_lossless.webp). Because it is lossless with -exact, its RGB is preserved bit-exact, so a known pixel can be checked after decode.

Flow:

1. ra8_cgc_init / ra8_mstp_init / ra8_time_init bring the clocks and SysTick up.
2. ra8_board_uart_console_init opens the J-Link OB VCOM console (SCI8).
3. Bind a static SRAM arena, decode the baked WebP into a static RGBA8888 framebuffer, and verify pixel (1,1) == (32, 32, 32, 255).
4. Print "webp: PASS 8x8\r\n" on success (banner line for the HIL scrape) or "webp: FAIL\r\n" on any mismatch, then park.

NOTE(#289): this decodes a whole WebP into one RGBA buffer. The band-tile normalisation + reflow raster dispatch land with #289.

Copyright

Copyright (c) 2026 Brighton Sikarskie SPDX-License-Identifier: MIT

Since

0.1.0

Definition in file main.c.

Enumeration Type Documentation

webp_demo_consts_t

enum webp_demo_consts_t : uint32_t

Fixed geometry + buffer sizes for the baked 8x8 fixture.

Enumerator
k_webp_demo_baud	Console baud rate.
k_webp_demo_dim	Fixture width and height.
k_webp_demo_bpp	RGBA8888 bytes per pixel.
k_webp_demo_stride	Row stride.
k_webp_demo_fb_bytes	8x8 RGBA.
k_webp_demo_scratch	Decode arena, bytes.
k_webp_demo_probe_r	Expected R at pixel (1,1).
k_webp_demo_probe_a	Expected A at pixel (1,1).

Definition at line 51 of file main.c.

Function Documentation

main()

void main

(

void

)

Application entry point.

The application entry point Reset_Handler hands control to.

Since

0.1.0

Definition at line 155 of file main.c.

References k_webp_demo_fail, k_webp_demo_pass, ra8_board_uart_console_write(), webp_demo_decode_ok(), webp_demo_panic_halt(), and webp_demo_setup_or_halt().

webp_demo_decode_ok()

bool webp_demo_decode_ok ( void )

static

Decode the baked fixture and confirm a known pixel round-trips.

Returns

true if the decode succeeded and pixel (1,1) matches the source.

Precondition

The console + clocks are up (webp_demo_setup_or_halt ran).

Postcondition

s_webp_demo_fb holds the decoded canvas on success.

Since

0.1.0

Definition at line 126 of file main.c.

References k_ra8_ok, k_webp_demo_bpp, k_webp_demo_dim, k_webp_demo_probe_a, k_webp_demo_probe_r, k_webp_demo_stride, k_webp_lossless, ra8_webp_decode_rgba(), s_webp_demo_fb, and s_webp_demo_scratch.

Referenced by main().

webp_demo_panic_halt()

void webp_demo_panic_halt ( void )

static

Park the CPU forever after a fatal init failure.

Precondition

Called only after an unrecoverable setup error.

Postcondition

CPU is parked; only a debugger or reset wakes it.

Since

0.1.0

Definition at line 86 of file main.c.

Referenced by main(), and webp_demo_setup_or_halt().

webp_demo_setup_or_halt()

void webp_demo_setup_or_halt ( void )

static

Bring CGC + module-stop + SysTick + console up, or panic-halt.

Precondition

Reset default clock tree; MSTP gating cleared for nothing yet.

Postcondition

CGC live, SysTick running, and the console is ready for writes.

Since

0.1.0

Definition at line 99 of file main.c.

References k_ra8_clock_id_cpuclk0, k_ra8_ok, k_webp_demo_baud, ra8_board_uart_console_init(), ra8_cgc_get_clock_hz(), ra8_cgc_init(), ra8_mstp_init(), ra8_time_init(), and webp_demo_panic_halt().

Referenced by main().

Variable Documentation

k_webp_demo_fail

const uint8_t k_webp_demo_fail[] = "webp: FAIL\r\n"

static

FAIL banner (HIL scrape target).

Definition at line 73 of file main.c.

Referenced by main().

k_webp_demo_pass

const uint8_t k_webp_demo_pass[] = "webp: PASS 8x8\r\n"

static

PASS banner (HIL scrape target).

Definition at line 71 of file main.c.

Referenced by main().

k_webp_lossless

const uint8_t k_webp_lossless[]

static

Initial value:

                                     = {
  0x52, 0x49, 0x46, 0x46, 0x2C, 0x00, 0x00, 0x00, 0x57, 0x45, 0x42, 0x50, 0x56,
  0x50, 0x38, 0x4C, 0x1F, 0x00, 0x00, 0x00, 0x2F, 0x07, 0xC0, 0x01, 0x00, 0xCD,
  0x65, 0x44, 0xFF, 0x63, 0x17, 0x85, 0x28, 0x78, 0xFF, 0x03, 0x42, 0x02, 0xC2,
  0x14, 0xFF, 0x77, 0x6A, 0x0E, 0x0C, 0x48, 0xC4, 0x04, 0x80, 0xAD, 0x0D, 0x00,
}

8x8 VP8L (lossless, -exact) fixture – see tests/fixtures/webp/README.md.

Definition at line 63 of file main.c.

Referenced by webp_demo_decode_ok().

s_webp_demo_fb

uint8_t s_webp_demo_fb[k_webp_demo_fb_bytes]

static

Decoded RGBA8888 output framebuffer.

Definition at line 78 of file main.c.

Referenced by webp_demo_decode_ok().

s_webp_demo_scratch

uint8_t s_webp_demo_scratch[k_webp_demo_scratch]

static

Decode arena backing store (static SRAM, NASA P10 Rule 3).

Definition at line 76 of file main.c.

Referenced by webp_demo_decode_ok().