From 1e8e440721f8475960f45cf43b5c89cd44c8d95d Mon Sep 17 00:00:00 2001
From: sakumisu <1203593632@qq.com>
Date: Wed, 16 Jul 2025 22:54:21 +0800
Subject: [PATCH] fix(demo): ignore zero bytes for bl ip

Signed-off-by: sakumisu <1203593632@qq.com>
---
 demo/video_audiov1_hid_template.c  | 4 ++++
 demo/video_static_h264_template.c  | 4 ++++
 demo/video_static_mjpeg_template.c | 4 ++++
 demo/video_static_yuyv_template.c  | 4 ++++
 4 files changed, 16 insertions(+)

diff --git a/demo/video_audiov1_hid_template.c b/demo/video_audiov1_hid_template.c
index 1d1948c9..99df89b9 100644
--- a/demo/video_audiov1_hid_template.c
+++ b/demo/video_audiov1_hid_template.c
@@ -448,6 +448,10 @@ void usbd_video_close(uint8_t busid, uint8_t intf)
 
 void usbd_video_iso_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    if (nbytes == 0) {
+        return;
+    }
+
     if (usbd_video_stream_split_transfer(busid, ep)) {
         /* one frame has done */
         video_iso_tx_busy = false;
diff --git a/demo/video_static_h264_template.c b/demo/video_static_h264_template.c
index a472244b..7337f5f7 100644
--- a/demo/video_static_h264_template.c
+++ b/demo/video_static_h264_template.c
@@ -252,6 +252,10 @@ void usbd_video_close(uint8_t busid, uint8_t intf)
 
 void usbd_video_iso_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    if (nbytes == 0) {
+        return;
+    }
+
     if (usbd_video_stream_split_transfer(busid, ep)) {
         /* one frame has done */
         iso_tx_busy = false;
diff --git a/demo/video_static_mjpeg_template.c b/demo/video_static_mjpeg_template.c
index 667a2fbb..3fc923f8 100644
--- a/demo/video_static_mjpeg_template.c
+++ b/demo/video_static_mjpeg_template.c
@@ -252,6 +252,10 @@ void usbd_video_close(uint8_t busid, uint8_t intf)
 
 void usbd_video_iso_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    if (nbytes == 0) {
+        return;
+    }
+
     if (usbd_video_stream_split_transfer(busid, ep)) {
         /* one frame has done */
         iso_tx_busy = false;
diff --git a/demo/video_static_yuyv_template.c b/demo/video_static_yuyv_template.c
index 6b5da39d..7c7d1789 100644
--- a/demo/video_static_yuyv_template.c
+++ b/demo/video_static_yuyv_template.c
@@ -256,6 +256,10 @@ void usbd_video_close(uint8_t busid, uint8_t intf)
 
 void usbd_video_iso_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    if (nbytes == 0) {
+        return;
+    }
+
     if (usbd_video_stream_split_transfer(busid, ep)) {
         /* one frame has done */
         iso_tx_busy = false;