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esp32cam-demo
kopia lustrzana https://github.com/alanesq/esp32cam-demo
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Update esp32cam-demo.ino

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Alan 2022-01-18 17:49:26 +00:00 zatwierdzone przez GitHub
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commit a423688468
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esp32cam-demo.ino
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@ -596,7 +596,7 @@ void sendText(WiFiClient &client, String theText) {
}
// reset the camera example
// reset the camera example - see handleTest() for example
void resetCamera() {
// power cycle the camera module (handy if camera stops responding)
digitalWrite(PWDN_GPIO_NUM, HIGH); // turn power off to camera module
@ -1021,7 +1021,8 @@ void readRGBImage() {
// make sure psram is available
if (!psramFound()) {
sendText(client,"error: no psram available to store the RGB data");
if (!sendRGBfile) sendFooter(client); // close web page
client.write("<br><a href='/'>Return</a>\n"); // link back
if (!sendRGBfile) sendFooter(client); // close web page
return;
}
@ -1034,21 +1035,26 @@ void readRGBImage() {
fb = esp_camera_fb_get();
if (!fb) {
sendText(client,"error: failed to capture image from camera");
if (!sendRGBfile) sendFooter(client); // close web page
client.write("<br><a href='/'>Return</a>\n"); // link back
if (!sendRGBfile) sendFooter(client); // close web page
return;
} else {
sendText(client, "-JPG image capture took " + String(millis() - tTimer) + " milliseconds"); // report time it took to capture an image
sendText(client,"-Image resolution=" + String(fb->width) + "x" + String(fb->height));
sendText(client,"-Image size=" + String(fb->len) + " bytes");
sendText(client, "-Image resolution=" + String(fb->width) + "x" + String(fb->height));
sendText(client, "-Image size=" + String(fb->len) + " bytes");
sendText(client, "-Image format=" + String(fb->format));
sendText(client, "-Free memory=" + String(ESP.getFreeHeap()) + " bytes");
}
// display captured image using base64 - probably not a good idea with large images?
/*
// display captured image using base64 - seems a bit unreliable especially with larger images?
if (!sendRGBfile) {
client.print("<br>Displaying image direct from frame buffer");
client.print("<br><img src='data:image/png;base64,");
client.print(base64::encode(fb->buf, fb->len));
client.println("'><br>");
String base64data = base64::encode(fb->buf, fb->len); // convert buffer to base64
client.print(" - Base64 data length = " + String(base64data.length()) + " bytes\n" );
client.print("<br><img src='data:image/jpg;base64," + base64data + "'></img><br>\n");
}
*/
// allocate memory to store the rgb data (in psram, 3 bytes per pixel)
sendText(client,"<br>Free psram before rgb data allocated = " + String(heap_caps_get_free_size(MALLOC_CAP_SPIRAM) / 1024) + "K");
@ -1327,6 +1333,33 @@ void handleTest() {
// test code goes here
// draw on camera image using javascript / html canvas
// load live camera image without displaying it
client.print("<img id='myImage' width='0' height='0' src='/jpg'>\n");
// create a html canvas
client.print("<canvas id='myCanvas' width='640' height='480' style='border:1px solid #d3d3d3;'>");
client.print("Your browser does not support the HTML5 canvas tag. </canvas>\n");
// javascript
client.print (R"=====(<script>
// copy camera image in to canvas
window.onload = function() {
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
var img = document.getElementById("myImage");
ctx.drawImage(img, 0, 0);
// draw red box on top of the image
ctx.strokeStyle = "red";
ctx.rect(20, 20, 150, 100);
ctx.stroke();
}
</script>)=====");
/*
// demo of how to change image resolution - note: this stops PWM on the flash working for some reason
esp_camera_deinit(); // disable camera
delay(50);
@ -1337,6 +1370,7 @@ void handleTest() {
else FRAME_SIZE_IMAGE = FRAMESIZE_QVGA;
initialiseCamera(); // restart camera
client.println("Camera resolution changed to " + String(FRAME_SIZE_IMAGE));
*/
/*