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refactoring

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This commit is contained in:
Maxim Devaev 2025-07-28 21:29:27 +03:00
parent 3a831817f4
commit f7ebe31c71
1 changed files with 11 additions and 8 deletions
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19
src/libs/capture.c
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@ -569,25 +569,28 @@ bool _capture_is_buffer_valid(const us_capture_s *cap, const struct v4l2_buffer
if (us_is_jpeg(cap->run->format)) {
if (buf->bytesused < 125) {
// https://stackoverflow.com/questions/2253404/what-is-the-smallest-valid-jpeg-file-size-in-bytes
_LOG_DEBUG("Discarding invalid frame, too small to be a valid JPEG: bytesused=%u", buf->bytesused);
_LOG_DEBUG("Discarding invalid frame, too small to be a valid JPEG: bytesused=%u",
buf->bytesused);
return false;
}
const u16 begin_marker = (((u16)(data[0]) << 8) | data[1]);
if (begin_marker != 0xFFD8) {
_LOG_DEBUG("Discarding JPEG frame with invalid header: begin_marker=0x%04x, bytesused=%u", begin_marker, buf->bytesused);
_LOG_DEBUG("Discarding JPEG frame with invalid header: begin_marker=0x%04x, bytesused=%u",
begin_marker, buf->bytesused);
return false;
}
const u8 *const end_ptr = data + buf->bytesused;
const u8 *const eoi_ptr = end_ptr - 2;
const u16 eoi_marker = (((u16)(eoi_ptr[0]) << 8) | eoi_ptr[1]);
if (eoi_marker != 0xFFD9 && eoi_marker != 0xD900 && eoi_marker != 0x0000) {
const u8 *const end_ptr = data + buf->bytesused - 2;
const u16 end_marker = (((u16)(end_ptr[0]) << 8) | end_ptr[1]);
if (end_marker != 0xFFD9 && end_marker != 0xD900 && end_marker != 0x0000) {
if (!cap->allow_truncated_frames) {
_LOG_DEBUG("Discarding truncated JPEG frame: eoi_marker=0x%04x, bytesused=%u", eoi_marker, buf->bytesused);
_LOG_DEBUG("Discarding truncated JPEG frame: end_marker=0x%04x, bytesused=%u",
end_marker, buf->bytesused);
return false;
}
_LOG_DEBUG("Got truncated JPEG frame: eoi_marker=0x%04x, bytesused=%u", eoi_marker, buf->bytesused);
_LOG_DEBUG("Got truncated JPEG frame: end_marker=0x%04x, bytesused=%u",
end_marker, buf->bytesused);
}
}