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update getJpegSignature to work with current systeminformation #25

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update getJpegSignature to work with current systeminformation #25

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26 changes: 14 additions & 12 deletions src/lib/stream-camera.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -69,19 +69,21 @@ class StreamCamera extends EventEmitter {

static async getJpegSignature() {
const systemInfo = await si.system();
switch (systemInfo.model) {
case 'BCM2711':
case 'BCM2835 - Pi 3 Model B':
case 'BCM2835 - Pi 3 Model B+':
case 'BCM2835 - Pi 4 Model B':
case 'BCM2835 - Pi Zero':
case 'BCM2835 - Pi Zero W':
return Buffer.from([0xff, 0xd8, 0xff, 0xdb, 0x00, 0x84, 0x00]);
default:
throw new Error(
`Could not determine JPEG signature. Unknown system model '${systemInfo.model}'`,
);
const { processor, type } = systemInfo.raspberry || {};
// note: we check both BCM and BMC, as systemInfo lib seems to sometimes return BMC for now
if (
['BCM2711', 'BMC2711'].indexOf(processor) >= 0
|| (
['BCM2835', 'BMC2835'].indexOf(processor) >= 0
&& ['3B', '3B+', '4B', 'Zero', 'Zero W'].indexOf(type) >= 0
)
) {
return Buffer.from([0xff, 0xd8, 0xff, 0xdb, 0x00, 0x84, 0x00]);
}

throw new Error(
`Could not determine JPEG signature. Unknown system model '${processor} - ${type}'`,
);
}

startCapture(): Promise<void> {
Expand Down