Juli
65a391940b
ESP-IDF 5.5 + LVGL 9 firmware that plays random public cameras from insecam.org on the T-Embed's 320x170 screen, live MJPEG where available, a new camera every 20 seconds. Knob steps through cameras, LED ring shows the countdown. Auto-detects the original vs CC1101 board, reuses Wi-Fi credentials from NVS and falls back to a captive-portal setup hotspot.
24 lines
925 B
C
24 lines
925 B
C
#pragma once
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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// Pulls complete JPEG files out of an arbitrary byte stream (single image,
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// MJPEG multipart, junk in between) by walking the marker structure, so an
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// EOI inside an EXIF thumbnail can't truncate a frame.
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typedef struct {
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int state;
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uint8_t marker;
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uint32_t remaining;
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uint8_t *out;
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size_t out_len, out_cap;
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size_t skipped; // bytes discarded while hunting for SOI
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} jpegframe_t;
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void jpegframe_init(jpegframe_t *f, uint8_t *out, size_t out_cap);
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void jpegframe_reset(jpegframe_t *f);
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// Consumes input; returns the number of bytes used. *complete is set when
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// out[0..out_len) holds a whole JPEG (unused input stays for the next call).
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// *overflow is set if a frame outgrew the buffer; the extractor then resyncs.
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size_t jpegframe_feed(jpegframe_t *f, const uint8_t *in, size_t n, bool *complete, bool *overflow);
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