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Web video transmission.

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This commit is contained in:
Zhentao-Lin 2022-05-14 17:38:35 +08:00
parent eeb00a782d
commit 1004445e89
3 changed files with 530 additions and 0 deletions
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88
C/Sketches/Sketch_05.2_As_VideoWebServer/Sketch_05.2_As_VideoWebServer.ino Normal file
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#include "esp_camera.h"
#include <WiFi.h>
//
// WARNING!!! PSRAM IC required for UXGA resolution and high JPEG quality
// Ensure ESP32 Wrover Module or other board with PSRAM is selected
// Partial images will be transmitted if image exceeds buffer size
//
// Select camera model
#define CAMERA_MODEL_WROVER_KIT // Has PSRAM
#include "camera_pins.h"
const char* ssid = "********"; //input your wifi name
const char* password = "********"; //input your wifi passwords
void startCameraServer();
void setup() {
Serial.begin(115200);
Serial.setDebugOutput(true);
Serial.println();
camera_config_t config;
config.ledc_channel = LEDC_CHANNEL_0;
config.ledc_timer = LEDC_TIMER_0;
config.pin_d0 = Y2_GPIO_NUM;
config.pin_d1 = Y3_GPIO_NUM;
config.pin_d2 = Y4_GPIO_NUM;
config.pin_d3 = Y5_GPIO_NUM;
config.pin_d4 = Y6_GPIO_NUM;
config.pin_d5 = Y7_GPIO_NUM;
config.pin_d6 = Y8_GPIO_NUM;
config.pin_d7 = Y9_GPIO_NUM;
config.pin_xclk = XCLK_GPIO_NUM;
config.pin_pclk = PCLK_GPIO_NUM;
config.pin_vsync = VSYNC_GPIO_NUM;
config.pin_href = HREF_GPIO_NUM;
config.pin_sscb_sda = SIOD_GPIO_NUM;
config.pin_sscb_scl = SIOC_GPIO_NUM;
config.pin_pwdn = PWDN_GPIO_NUM;
config.pin_reset = RESET_GPIO_NUM;
config.xclk_freq_hz = 20000000;
config.pixel_format = PIXFORMAT_JPEG;
// if PSRAM IC present, init with UXGA resolution and higher JPEG quality
// for larger pre-allocated frame buffer.
if(psramFound()){
config.frame_size = FRAMESIZE_UXGA;
config.jpeg_quality = 10;
config.fb_count = 2;
} else {
config.frame_size = FRAMESIZE_SVGA;
config.jpeg_quality = 12;
config.fb_count = 1;
}
// camera init
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf("Camera init failed with error 0x%x", err);
return;
}
sensor_t * s = esp_camera_sensor_get();
// drop down frame size for higher initial frame rate
s->set_framesize(s, FRAMESIZE_VGA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
startCameraServer();
Serial.print("Camera Ready! Use 'http://");
Serial.print(WiFi.localIP());
Serial.println("' to connect");
}
void loop() {
// put your main code here, to run repeatedly:
delay(10000);
}

267
C/Sketches/Sketch_05.2_As_VideoWebServer/app_httpd.cpp Normal file
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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "esp_http_server.h"
#include "esp_timer.h"
#include "esp_camera.h"
#include "img_converters.h"
#include "fb_gfx.h"
#include "driver/ledc.h"
#include "sdkconfig.h"
#if defined(ARDUINO_ARCH_ESP32) && defined(CONFIG_ARDUHAL_ESP_LOG)
#include "esp32-hal-log.h"
#define TAG ""
#else
#include "esp_log.h"
static const char *TAG = "camera_httpd";
#endif
typedef struct
{
httpd_req_t *req;
size_t len;
} jpg_chunking_t;
#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\nX-Timestamp: %d.%06d\r\n\r\n";
httpd_handle_t stream_httpd = NULL;
httpd_handle_t camera_httpd = NULL;
typedef struct
{
size_t size; // number of values used for filtering
size_t index; // current value index
size_t count; // value count
int sum;
int *values; // array to be filled with values
} ra_filter_t;
static ra_filter_t ra_filter;
static ra_filter_t *ra_filter_init(ra_filter_t *filter, size_t sample_size)
{
memset(filter, 0, sizeof(ra_filter_t));
filter->values = (int *)malloc(sample_size * sizeof(int));
if (!filter->values)
{
return NULL;
}
memset(filter->values, 0, sample_size * sizeof(int));
filter->size = sample_size;
return filter;
}
static int ra_filter_run(ra_filter_t *filter, int value)
{
if (!filter->values)
{
return value;
}
filter->sum -= filter->values[filter->index];
filter->values[filter->index] = value;
filter->sum += filter->values[filter->index];
filter->index++;
filter->index = filter->index % filter->size;
if (filter->count < filter->size)
{
filter->count++;
}
return filter->sum / filter->count;
}
static esp_err_t stream_handler(httpd_req_t *req)
{
camera_fb_t *fb = NULL;
struct timeval _timestamp;
esp_err_t res = ESP_OK;
size_t _jpg_buf_len = 0;
uint8_t *_jpg_buf = NULL;
char *part_buf[128];
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;
}
httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
httpd_resp_set_hdr(req, "X-Framerate", "60");
while (true)
{
fb = esp_camera_fb_get();
if (!fb)
{
ESP_LOGE(TAG, "Camera capture failed");
res = ESP_FAIL;
}
else
{
_timestamp.tv_sec = fb->timestamp.tv_sec;
_timestamp.tv_usec = fb->timestamp.tv_usec;
if (fb->format != PIXFORMAT_JPEG)
{
bool jpeg_converted = frame2jpg(fb, 80, &_jpg_buf, &_jpg_buf_len);
esp_camera_fb_return(fb);
fb = NULL;
if (!jpeg_converted)
{
ESP_LOGE(TAG, "JPEG compression failed");
res = ESP_FAIL;
}
}
else
{
_jpg_buf_len = fb->len;
_jpg_buf = fb->buf;
}
}
if (res == ESP_OK)
{
res = httpd_resp_send_chunk(req, _STREAM_BOUNDARY, strlen(_STREAM_BOUNDARY));
}
if (res == ESP_OK)
{
size_t hlen = snprintf((char *)part_buf, 128, _STREAM_PART, _jpg_buf_len, _timestamp.tv_sec, _timestamp.tv_usec);
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 (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)
{
ESP_LOGI(TAG, "res != ESP_OK : %d , break!", res);
break;
}
int64_t fr_end = esp_timer_get_time();
int64_t frame_time = fr_end - last_frame;
last_frame = fr_end;
frame_time /= 1000;
uint32_t avg_frame_time = ra_filter_run(&ra_filter, frame_time);
ESP_LOGI(TAG, "MJPG: %uB %ums (%.1ffps), AVG: %ums (%.1ffps)",
(uint32_t)(_jpg_buf_len),
(uint32_t)frame_time, 1000.0 / (uint32_t)frame_time,
avg_frame_time, 1000.0 / avg_frame_time);
}
ESP_LOGI(TAG, "Stream exit!");
last_frame = 0;
return res;
}
static esp_err_t parse_get(httpd_req_t *req, char **obuf)
{
char *buf = NULL;
size_t buf_len = 0;
buf_len = httpd_req_get_url_query_len(req) + 1;
if (buf_len > 1)
{
buf = (char *)malloc(buf_len);
if (!buf)
{
httpd_resp_send_500(req);
return ESP_FAIL;
}
if (httpd_req_get_url_query_str(req, buf, buf_len) == ESP_OK)
{
*obuf = buf;
return ESP_OK;
}
free(buf);
}
httpd_resp_send_404(req);
return ESP_FAIL;
}
const char index_web[] =
"\
<html>\
<head>\
<title>Video Streaming Demonstration</title>\
</head>\
<body>\
<h1>Video Streaming Demonstration</h1>\
<img src=\"/stream\"\ style=\"transform:rotate(180deg)\"/>\
</body>\
</html>\
";
static esp_err_t index_handler(httpd_req_t *req)
{
httpd_resp_set_type(req, "text/html");
// httpd_resp_set_hdr(req, "Content-Encoding", "gzip");
sensor_t *s = esp_camera_sensor_get();
if (s != NULL)
{
// return httpd_resp_sendstr(req, (const char *)index_web);
return httpd_resp_send(req, (const char *)index_web, sizeof(index_web));
// return httpd_resp_send(req, (const char *)index_ov2640_html_gz, index_ov2640_html_gz_len);
}
else
{
ESP_LOGE(TAG, "Camera sensor not found");
return httpd_resp_send_500(req);
}
}
void startCameraServer()
{
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
config.max_uri_handlers = 16;
httpd_uri_t index_uri = {
.uri = "/",
.method = HTTP_GET,
.handler = index_handler,
.user_ctx = NULL};
httpd_uri_t stream_uri = {
.uri = "/stream",
.method = HTTP_GET,
.handler = stream_handler,
.user_ctx = NULL};
ra_filter_init(&ra_filter, 20);
ESP_LOGI(TAG, "Starting web server on port: '%d'", config.server_port);
if (httpd_start(&camera_httpd, &config) == ESP_OK)
{
httpd_register_uri_handler(camera_httpd, &index_uri);
httpd_register_uri_handler(camera_httpd, &stream_uri);
}
}

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C/Sketches/Sketch_05.2_As_VideoWebServer/camera_pins.h Normal file
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#if defined(CAMERA_MODEL_WROVER_KIT)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 21
#define SIOD_GPIO_NUM 26
#define SIOC_GPIO_NUM 27
#define Y9_GPIO_NUM 35
#define Y8_GPIO_NUM 34
#define Y7_GPIO_NUM 39
#define Y6_GPIO_NUM 36
#define Y5_GPIO_NUM 19
#define Y4_GPIO_NUM 18
#define Y3_GPIO_NUM 5
#define Y2_GPIO_NUM 4
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 23
#define PCLK_GPIO_NUM 22
#elif defined(CAMERA_MODEL_ESP_EYE)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 4
#define SIOD_GPIO_NUM 18
#define SIOC_GPIO_NUM 23
#define Y9_GPIO_NUM 36
#define Y8_GPIO_NUM 37
#define Y7_GPIO_NUM 38
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 35
#define Y4_GPIO_NUM 14
#define Y3_GPIO_NUM 13
#define Y2_GPIO_NUM 34
#define VSYNC_GPIO_NUM 5
#define HREF_GPIO_NUM 27
#define PCLK_GPIO_NUM 25
#elif defined(CAMERA_MODEL_M5STACK_PSRAM)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 25
#define SIOC_GPIO_NUM 23
#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 32
#define VSYNC_GPIO_NUM 22
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#elif defined(CAMERA_MODEL_M5STACK_V2_PSRAM)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 22
#define SIOC_GPIO_NUM 23
#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 32
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#elif defined(CAMERA_MODEL_M5STACK_WIDE)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 22
#define SIOC_GPIO_NUM 23
#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 32
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#elif defined(CAMERA_MODEL_M5STACK_ESP32CAM)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 25
#define SIOC_GPIO_NUM 23
#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 17
#define VSYNC_GPIO_NUM 22
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#elif defined(CAMERA_MODEL_M5STACK_UNITCAM)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 25
#define SIOC_GPIO_NUM 23
#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 32
#define VSYNC_GPIO_NUM 22
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#elif defined(CAMERA_MODEL_AI_THINKER)
#define PWDN_GPIO_NUM 32
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 0
#define SIOD_GPIO_NUM 26
#define SIOC_GPIO_NUM 27
#define Y9_GPIO_NUM 35
#define Y8_GPIO_NUM 34
#define Y7_GPIO_NUM 39
#define Y6_GPIO_NUM 36
#define Y5_GPIO_NUM 21
#define Y4_GPIO_NUM 19
#define Y3_GPIO_NUM 18
#define Y2_GPIO_NUM 5
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 23
#define PCLK_GPIO_NUM 22
#elif defined(CAMERA_MODEL_TTGO_T_JOURNAL)
#define PWDN_GPIO_NUM 0
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 25
#define SIOC_GPIO_NUM 23
#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 17
#define VSYNC_GPIO_NUM 22
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#else
#error "Camera model not selected"
#endif