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Streaming support for "FPS Max"

pull/170/head
Michael Ludvig 2021-02-03 17:17:16 +13:00
parent 4d993ecddd
commit 6b5fe5a156
1 changed files with 18 additions and 0 deletions
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18
examples/single_chip/camera_web_server/main/app_httpd.c
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@ -62,6 +62,11 @@ bool isStreaming = false;
#endif
#endif
#define FPS_DEFAULT -1 // -1 = Unlimited FPS
#define FPS_TO_PERIOD(FPS) (FPS<1?0:(1000000/FPS))
unsigned int fps_max = FPS_DEFAULT;
uint64_t fps_period_us = FPS_TO_PERIOD(FPS_DEFAULT);
typedef struct
{
httpd_req_t *req;
@ -478,6 +483,7 @@ static esp_err_t stream_handler(httpd_req_t *req)
int64_t fr_encode = 0;
#endif
int64_t next_frame_time = 0;
static int64_t last_frame = 0;
if (!last_frame)
{
@ -500,6 +506,13 @@ static esp_err_t stream_handler(httpd_req_t *req)
while (true)
{
// Wait to limit FPS if required
// NB fps_delay_ms can be negative if processing takes too long -> in that case don't wait
int64_t fps_delay_ms = (next_frame_time - esp_timer_get_time()) / 1000;
if (fps_max > 0 && fps_delay_ms > 0)
vTaskDelay(fps_delay_ms / portTICK_PERIOD_MS);
next_frame_time = esp_timer_get_time() + fps_period_us;
#if CONFIG_ESP_FACE_DETECT_ENABLED
detected = false;
face_id = 0;
@ -726,6 +739,10 @@ static esp_err_t cmd_handler(httpd_req_t *req)
}
}
}
else if (!strcmp(variable, "fps_max")) {
fps_max = val;
fps_period_us = FPS_TO_PERIOD(fps_max);
}
else if (!strcmp(variable, "quality"))
res = s->set_quality(s, val);
else if (!strcmp(variable, "contrast"))
@ -858,6 +875,7 @@ static esp_err_t status_handler(httpd_req_t *req)
p += sprintf(p, "\"xclk\":%u,", s->xclk_freq_hz / 1000000);
p += sprintf(p, "\"pixformat\":%u,", s->pixformat);
p += sprintf(p, "\"framesize\":%u,", s->status.framesize);
p += sprintf(p, "\"fps_max\":%u,", fps_max);
p += sprintf(p, "\"quality\":%u,", s->status.quality);
p += sprintf(p, "\"brightness\":%d,", s->status.brightness);
p += sprintf(p, "\"contrast\":%d,", s->status.contrast);