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Separate a handling resource into controller and streaming

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This commit is contained in:
kkitayam
2021-09-20 14:55:56 +09:00
parent 2b4e02f192
commit 3cb4bb391d
6 changed files with 303 additions and 142 deletions
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41
examples/device/video_capture/src/main.c
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@@ -30,10 +30,14 @@
#include "bsp/board.h"
#include "tusb.h"
#include "images.h"
//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF PROTYPES
//--------------------------------------------------------------------+
#define FRAME_WIDTH 128
#define FRAME_HEIGHT 96
/* Blink pattern
* - 250 ms : device not mounted
* - 1000 ms : device mounted
@@ -102,8 +106,45 @@ void tud_resume_cb(void)
//--------------------------------------------------------------------+
// USB Video
//--------------------------------------------------------------------+
static unsigned char const *frames[] = {
black_128x96_yuv, white_128x96_yuv
};
uint8_t current_frame = 0;
void video_task(void)
{
static unsigned start_ms = 0;
static unsigned interval_ms = 66;
static unsigned frame_num = 0;
static unsigned already_sent = 0;
if (!tud_video_n_streaming(0)) return;
if (!already_sent) {
tud_video_n_frame_xfer(0, 0, (void*)frames[current_frame], 128 * 96 * 12/8);
current_frame ^= 1;
already_sent = 1;
}
unsigned cur = board_millis();
if (cur - start_ms < interval_ms) return; // not enough time
start_ms += interval_ms;
/* flip buffer */
++frame_num;
if (frame_num % 3) {
interval_ms = 66;
} else {
interval_ms = 67;
}
}
int tud_video_frame_xfer_complete_cb(void)
{
/* prepare tx */
tud_video_n_frame_xfer(0, 0, (void*)frames[current_frame], 128 * 96 * 12/8);
current_frame ^= 1;
return 0;
}
//--------------------------------------------------------------------+