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esp-who/examples/single_chip/recognition_solution/main/app_httpserver.c

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/* ESPRESSIF MIT License
*
* Copyright (c) 2018 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
*
* Permission is hereby granted for use on all ESPRESSIF SYSTEMS products, in which case,
* it is free of charge, to any person obtaining a copy of this software and associated
* documentation files (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "app_httpserver.h"
#include "esp_log.h"
#include "image_util.h"
#include "fb_gfx.h"
#include "app_main.h"
static const char *TAG = "app_httpserver";
#define FACE_COLOR_WHITE 0x00FFFFFF
#define FACE_COLOR_BLACK 0x00000000
#define FACE_COLOR_RED 0x000000FF
#define FACE_COLOR_GREEN 0x0000FF00
#define FACE_COLOR_BLUE 0x00FF0000
#define FACE_COLOR_YELLOW (FACE_COLOR_RED | FACE_COLOR_GREEN)
#define FACE_COLOR_CYAN (FACE_COLOR_BLUE | FACE_COLOR_GREEN)
#define FACE_COLOR_PURPLE (FACE_COLOR_BLUE | FACE_COLOR_RED)
#define ENROLL_CONFIRM_TIMES 3
#define FACE_ID_SAVE_NUMBER 10
#define PART_BOUNDARY "123456789000000000000987654321"
static const char* _STREAM_CONTENT_TYPE = "multipart/x-mixed-replace;boundary=" PART_BOUNDARY;
static const char* _STREAM_BOUNDARY = "\r\n--" PART_BOUNDARY "\r\n";
static const char* _STREAM_PART = "Content-Type: image/jpeg\r\nContent-Length: %u\r\n\r\n";
face_id_list st_face_list = {0};
dl_matrix3du_t *aligned_face = NULL;
static void oneshot_timer_callback(void* arg);
const char *number_suffix(int32_t number)
{
uint8_t n = number % 10;
if (n == 0)
return "zero";
else if (n == 1)
return "st";
else if (n == 2)
return "nd";
else if (n == 3)
return "rd";
else
return "th";
}
static void rgb_print(dl_matrix3du_t *image_matrix, uint32_t color, const char * str){
fb_data_t fb;
fb.width = image_matrix->w;
fb.height = image_matrix->h;
fb.data = image_matrix->item;
fb.bytes_per_pixel = 3;
fb.format = FB_BGR888;
fb_gfx_print(&fb, (fb.width - (strlen(str) * 14)) / 2, 10, color, str);
}
static int rgb_printf(dl_matrix3du_t *image_matrix, uint32_t color, const char *format, ...)
{
char loc_buf[64];
char * temp = loc_buf;
int len;
va_list arg;
va_list copy;
va_start(arg, format);
va_copy(copy, arg);
len = vsnprintf(loc_buf, sizeof(loc_buf), format, arg);
va_end(copy);
if(len >= sizeof(loc_buf)){
temp = (char*)malloc(len+1);
if(temp == NULL) {
return 0;
}
}
vsnprintf(temp, len+1, format, arg);
va_end(arg);
rgb_print(image_matrix, color, temp);
if(len > 64){
free(temp);
}
return len;
}
static void draw_face_boxes(dl_matrix3du_t *image_matrix, box_array_t *boxes){
int x, y, w, h, i;
uint32_t color = FACE_COLOR_YELLOW;
fb_data_t fb;
fb.width = image_matrix->w;
fb.height = image_matrix->h;
fb.data = image_matrix->item;
fb.bytes_per_pixel = 3;
fb.format = FB_BGR888;
for (i = 0; i < boxes->len; i++){
// rectangle box
x = (int)boxes->box[i].box_p[0];
y = (int)boxes->box[i].box_p[1];
w = (int)boxes->box[i].box_p[2] - x + 1;
h = (int)boxes->box[i].box_p[3] - y + 1;
fb_gfx_drawFastHLine(&fb, x, y, w, color);
fb_gfx_drawFastHLine(&fb, x, y+h-1, w, color);
fb_gfx_drawFastVLine(&fb, x, y, h, color);
fb_gfx_drawFastVLine(&fb, x+w-1, y, h, color);
#if 0
// landmark
int x0, y0, j;
for (j = 0; j < 10; j+=2) {
x0 = (int)boxes->landmark[i].landmark_p[j];
y0 = (int)boxes->landmark[i].landmark_p[j+1];
fb_gfx_fillRect(&fb, x0, y0, 3, 3, color);
}
#endif
}
}
esp_err_t facenet_stream_handler(httpd_req_t *req)
{
esp_err_t res = ESP_OK;
if (g_state != WAIT_FOR_CONNECT)
{
res = httpd_resp_send_404(req);
return res;
}
g_state = START_DETECT;
camera_fb_t * fb = NULL;
size_t _jpg_buf_len = 0;
uint8_t * _jpg_buf = NULL;
char * part_buf[64];
dl_matrix3du_t *image_matrix = NULL;
int face_id = -1;
int64_t fr_start = 0;
int64_t fr_ready = 0;
int64_t fr_face = 0;
int64_t fr_recognize = 0;
int64_t fr_encode = 0;
mtmn_config_t mtmn_config = mtmn_init_config();
static int64_t last_frame = 0;
if(!last_frame) {
last_frame = esp_timer_get_time();
}
res = httpd_resp_set_type(req, _STREAM_CONTENT_TYPE);
if(res != ESP_OK){
return res;
}
ESP_LOGI(TAG, "Get count %d\n", st_face_list.count);
while(true)
{
// update fsm state
if (g_is_enrolling)
{
g_state = START_ENROLL;
}
else if (g_is_deleting)
{
g_is_deleting = 0;
g_state = START_DELETE;
}
else if (g_state != START_ENROLL)
{
if (st_face_list.count == 0)
g_state = START_DETECT;
else
g_state = START_RECOGNITION;
}
ESP_LOGD(TAG, "State: %d, head:%d, tail:%d, count:%d", g_state, st_face_list.head, st_face_list.tail, st_face_list.count);
// exec event
if (g_state == START_DELETE)
{
uint8_t left = delete_face_id_in_flash(&st_face_list);
ESP_LOGW(TAG, "%d ID Left", left);
g_state = START_DETECT;
continue;
}
// Detection Start
fb = esp_camera_fb_get();
if (!fb)
{
ESP_LOGE(TAG, "Camera capture failed");
res = ESP_FAIL;
break;
}
fr_start = esp_timer_get_time();
fr_ready = fr_start;
fr_face = fr_start;
fr_encode = fr_start;
fr_recognize = fr_start;
image_matrix = dl_matrix3du_alloc(1, fb->width, fb->height, 3);
if (!image_matrix)
{
ESP_LOGE(TAG, "dl_matrix3du_alloc failed");
res = ESP_FAIL;
break;
}
if(!fmt2rgb888(fb->buf, fb->len, fb->format, image_matrix->item))
{
ESP_LOGW(TAG, "fmt2rgb888 failed");
//res = ESP_FAIL;
//dl_matrix3du_free(image_matrix);
//break;
}
fr_ready = esp_timer_get_time();
box_array_t *net_boxes = face_detect(image_matrix, &mtmn_config);
fr_face = esp_timer_get_time();
// Detection End
fr_recognize = fr_face;
if (net_boxes)
{
if ((g_state == START_ENROLL || g_state == START_RECOGNITION)
&& (align_face(net_boxes, image_matrix, aligned_face) == ESP_OK))
{
if (g_state == START_ENROLL)
{
rgb_print(image_matrix, FACE_COLOR_YELLOW, "START ENROLLING");
ESP_LOGD(TAG, "START ENROLLING");
int left_sample_face = enroll_face_id_to_flash(&st_face_list, aligned_face);
ESP_LOGD(TAG, "Face ID %d Enrollment: Taken the %d%s sample",
st_face_list.tail,
ENROLL_CONFIRM_TIMES - left_sample_face,
number_suffix(ENROLL_CONFIRM_TIMES - left_sample_face));
gpio_set_level(GPIO_LED_RED, 0);
rgb_printf(image_matrix, FACE_COLOR_CYAN, "\nThe %u%s sample",
ENROLL_CONFIRM_TIMES - left_sample_face,
number_suffix(ENROLL_CONFIRM_TIMES - left_sample_face));
if (left_sample_face == 0)
{
ESP_LOGI(TAG, "Enrolled Face ID: %d", st_face_list.tail);
rgb_printf(image_matrix, FACE_COLOR_CYAN, "\n\nEnrolled Face ID: %d", st_face_list.tail);
g_is_enrolling = 0;
g_state = START_RECOGNITION;
}
}
else
{
face_id = recognize_face(&st_face_list, aligned_face);
if (face_id >= 0)
{
gpio_set_level(GPIO_LED_RED, 1);
rgb_printf(image_matrix, FACE_COLOR_GREEN, "Hello ID %u", face_id);
}
else
{
rgb_print(image_matrix, FACE_COLOR_RED, "\nWHO?");
}
}
}
draw_face_boxes(image_matrix, net_boxes);
free(net_boxes->box);
free(net_boxes->landmark);
free(net_boxes);
fr_recognize = esp_timer_get_time();
if(!fmt2jpg(image_matrix->item, fb->width*fb->height*3, fb->width, fb->height, PIXFORMAT_RGB888, 90, &_jpg_buf, &_jpg_buf_len))
{
ESP_LOGE(TAG, "fmt2jpg failed");
dl_matrix3du_free(image_matrix);
res = ESP_FAIL;
}
esp_camera_fb_return(fb);
fb = NULL;
}
else
{
_jpg_buf = fb->buf;
_jpg_buf_len = fb->len;
}
dl_matrix3du_free(image_matrix);
fr_encode = esp_timer_get_time();
if(res == ESP_OK){
size_t hlen = snprintf((char *)part_buf, 64, _STREAM_PART, _jpg_buf_len);
res = httpd_resp_send_chunk(req, (const char *)part_buf, hlen);
}
if(res == ESP_OK){
res = httpd_resp_send_chunk(req, (const char *)_jpg_buf, _jpg_buf_len);
}
if(res == ESP_OK){
res = httpd_resp_send_chunk(req, _STREAM_BOUNDARY, strlen(_STREAM_BOUNDARY));
}
if(fb){
esp_camera_fb_return(fb);
fb = NULL;
_jpg_buf = NULL;
} else if(_jpg_buf){
free(_jpg_buf);
_jpg_buf = NULL;
}
if(res != ESP_OK){
break;
}
int64_t fr_end = esp_timer_get_time();
int64_t ready_time = (fr_ready - fr_start)/1000;
int64_t face_time = (fr_face - fr_ready)/1000;
int64_t recognize_time = (fr_recognize - fr_face)/1000;
int64_t encode_time = (fr_encode - fr_recognize)/1000;
int64_t process_time = (fr_encode - fr_start)/1000;
int64_t frame_time = fr_end - last_frame;
last_frame = fr_end;
frame_time /= 1000;
ESP_LOGD(TAG, "MJPG: %uKB %ums (%.1ffps), %u+%u+%u+%u=%u",
(uint32_t)(_jpg_buf_len/1024),
(uint32_t)frame_time, 1000.0 / (uint32_t)frame_time,
(uint32_t)ready_time, (uint32_t)face_time, (uint32_t)recognize_time, (uint32_t)encode_time, (uint32_t)process_time);
}
last_frame = 0;
g_state = WAIT_FOR_WAKEUP;
return ESP_OK;
}
httpd_uri_t _face_stream_handler = {
.uri = "/face_stream",
.method = HTTP_GET,
.handler = facenet_stream_handler,
.user_ctx = NULL
};
httpd_handle_t camera_httpd = NULL;
const esp_timer_create_args_t oneshot_timer_args = {
.callback = &oneshot_timer_callback,
/* argument specified here will be passed to timer callback function */
.name = "one-shot"
};
esp_timer_handle_t oneshot_timer;
static void oneshot_timer_callback(void* arg)
{
if(g_state != START_ENROLL)
g_is_enrolling = 1;
}
static void IRAM_ATTR gpio_isr_handler(void* arg)
{
esp_err_t err = esp_timer_start_once(oneshot_timer, 500000);
if(err == ESP_ERR_INVALID_STATE)
{
ESP_ERROR_CHECK(esp_timer_stop(oneshot_timer));
g_is_enrolling = 0;
g_is_deleting = 1;
gpio_set_level(GPIO_LED_WHITE, 0);
}
}
void app_httpserver_init ()
{
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
config.stack_size = 4096 * 2;
ESP_ERROR_CHECK(esp_timer_create(&oneshot_timer_args, &oneshot_timer));
gpio_config_t io_conf = {0};
io_conf.mode = GPIO_MODE_INPUT;
io_conf.intr_type = GPIO_PIN_INTR_POSEDGE;
io_conf.pin_bit_mask = 1LL << GPIO_BUTTON;
io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
gpio_config(&io_conf);
gpio_isr_handler_add(GPIO_BUTTON, gpio_isr_handler, NULL);
face_id_init(&st_face_list, FACE_ID_SAVE_NUMBER, ENROLL_CONFIRM_TIMES);
aligned_face = dl_matrix3du_alloc(1, FACE_WIDTH, FACE_HEIGHT, 3);
read_face_id_from_flash(&st_face_list);
if (httpd_start(&camera_httpd, &config) == ESP_OK)
{
httpd_register_uri_handler(camera_httpd, &_face_stream_handler);
}
}
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