void
camera_handler(void* request, void* response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
const char *temp;
uint8_t buff[1024];
camera_size_t camera_size = CAMERA_SIZE_1;
u16_t count;
u32_t size;
int index = 0, len = 0, tries = 10;
if (0 == *offset) {
/* Determine the size of picture. 1 for the smallest and 3 for the largest. */
if (!REST.get_query_variable(request, "size", &temp)) {
REST.get_post_variable(request, "size", &temp);
}
if (temp) {
camera_size = camera_parse_size(temp[0]);
}
leds_toggle(LEDS_GREEN);
camera_take_picture(camera_size, preferred_size, &size, &count);
}
index = *offset / preferred_size + 1;
count = camera_get_packet_count();
len = camera_try_get_packet(index, buff, tries);
*offset += len;
if (index >= count) {
*offset = -1;
}
REST.set_header_content_type(response, REST.type.IMAGE_JPEG);
REST.set_response_payload(response, buff, len);
}
static void
udp_handler(void)
{
static uint8_t tries = 10;
static camera_size_t camera_size;
static uint16_t index, count, len;
static uint32_t size;
char temp[MAX_PAYLOAD_LEN];
if (uip_newdata()) {
uip_ipaddr_copy(&server_conn->ripaddr, &UDP_HDR->srcipaddr);
server_conn->rport = UDP_HDR->srcport;
if (1 == uip_datalen()) {
camera_size = camera_parse_size(((char*)uip_appdata)[0]);
camera_take_picture(camera_size, DEFAULT_CAMERA_PACKET_SIZE, &size, &count);
/* Send picture size and packet count. */
/* The first 2 bytes are packet_no. */
/* Here set packet_no to 0 as this packet is not a real packet. */
temp[0] = temp[1] = 0;
temp[2] = size;
/* The next 4 bytes are size. */
temp[3] = size >> 8;
temp[4] = size >> 16;
temp[5] = size >> 24;
/* The coming is count. */
temp[6] = count;
temp[7] = count >> 8;
uip_udp_packet_send(server_conn, temp, 8);
/* Send picture packet by packet. */
for (index = 1; index <= count; index++) {
len = camera_try_get_packet(index, buffer, tries);
/* The first 2 bytes are packet_no. */
temp[0] = index;
temp[1] = index >> 8;
/* Copy the picture data next to packet_no. */
memcpy(temp + 2, buffer, len);
uip_udp_packet_send(server_conn, temp, len + 2);
}
} else {
/*
* Take a picture.
*/
void
take_handler(void* request, void* response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
const char *temp;
char buf[64] = "";
camera_size_t camera_size = CAMERA_SIZE_1;
uint16_t count;
uint32_t size;
/* Determine the size of picture. 1 for the smallest and 3 for the largest. */
if (!REST.get_query_variable(request, "size", &temp)) {
REST.get_post_variable(request, "size", &temp);
}
if (temp) {
camera_size = camera_parse_size(temp[0]);
}
camera_take_picture(camera_size, DEFAULT_CAMERA_PACKET_SIZE, &size, &count);
sprintf(buf, "{'t':'OK','s':%lu,'n':%u}", size, count);
REST.set_header_content_type(response, TEXT_PLAIN);
REST.set_response_payload(response, buf, strlen(buf));
}