Separate a handling resource into controller and streaming

3 files changed, 46 insertions, 1 deletions

diff --git a/examples/device/video_capture/src/main.c b/examples/device/video_capture/src/main.c
index 098cd2f8d..1921da4bf 100644
--- a/examples/device/video_capture/src/main.c
+++ b/examples/device/video_capture/src/main.c
@@ -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;
 }
 
 //--------------------------------------------------------------------+
diff --git a/examples/device/video_capture/src/tusb_config.h b/examples/device/video_capture/src/tusb_config.h
index ae2387357..3958b85b6 100644
--- a/examples/device/video_capture/src/tusb_config.h
+++ b/examples/device/video_capture/src/tusb_config.h
@@ -90,6 +90,10 @@
 #define CFG_TUD_ENDPOINT0_SIZE    64
 #endif
 
+#define CFG_TUD_VIDEO_EP_BUFSIZE  256
+
+#define CFG_TUD_VIDEO_STREAMING  1
+
 //------------- CLASS -------------//
 #define CFG_TUD_CDC              0
 #define CFG_TUD_MSC              0
diff --git a/examples/device/video_capture/src/usb_descriptors.c b/examples/device/video_capture/src/usb_descriptors.c
index d3544cc63..096ac4373 100644
--- a/examples/device/video_capture/src/usb_descriptors.c
+++ b/examples/device/video_capture/src/usb_descriptors.c
@@ -104,7 +104,7 @@ uint8_t const desc_fs_configuration[] =
   // Config number, interface count, string index, total length, attribute, power in mA
   TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0, 500),
   // IAD for Video Control
-  TUD_VIDEO_CAPTURE_DESCRIPTOR(4, EPNUM_VIDEO_IN, 128, 96, 15, 256)
+  TUD_VIDEO_CAPTURE_DESCRIPTOR(4, EPNUM_VIDEO_IN, 128, 96, 10, 256)
 };
 
 // Invoked when received GET CONFIGURATION DESCRIPTOR