diff options
| author | sakumisu <[email protected]> | 2023-08-30 17:43:13 +0800 |
|---|---|---|
| committer | sakumisu <[email protected]> | 2023-08-30 17:43:13 +0800 |
| commit | 7c1fae04b2faf38fa7da524d981f07bbd877ade3 (patch) | |
| tree | d40aeb7c2dad77cb9705c88150253fe766bf2ae6 | |
| parent | 14f5dd2dd3dcffa9caa1d4b9382f79be7919243c (diff) | |
fix video packet caculation
| -rw-r--r-- | class/video/usbd_video.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/class/video/usbd_video.c b/class/video/usbd_video.c index e8330627..0289ed7e 100644 --- a/class/video/usbd_video.c +++ b/class/video/usbd_video.c @@ -769,14 +769,14 @@ uint32_t usbd_video_mjpeg_payload_fill(uint8_t *input, uint32_t input_len, uint8 uint32_t picture_pos = 0; static uint8_t uvc_header[2] = { 0x02, 0x80 }; - packets = input_len / g_usbd_video.probe.dwMaxPayloadTransferSize + 1; - last_packet_size = input_len - ((packets - 1) * (g_usbd_video.probe.dwMaxPayloadTransferSize - 2)) + 2; + packets = (input_len + (g_usbd_video.probe.dwMaxPayloadTransferSize - 2) ) / (g_usbd_video.probe.dwMaxPayloadTransferSize - 2); + last_packet_size = input_len - ((packets - 1) * (g_usbd_video.probe.dwMaxPayloadTransferSize - 2)); for (size_t i = 0; i < packets; i++) { output[g_usbd_video.probe.dwMaxPayloadTransferSize * i] = uvc_header[0]; output[g_usbd_video.probe.dwMaxPayloadTransferSize * i + 1] = uvc_header[1]; if (i == (packets - 1)) { - memcpy(&output[2 + g_usbd_video.probe.dwMaxPayloadTransferSize * i], &input[picture_pos], last_packet_size - 2); + memcpy(&output[2 + g_usbd_video.probe.dwMaxPayloadTransferSize * i], &input[picture_pos], last_packet_size); output[g_usbd_video.probe.dwMaxPayloadTransferSize * i + 1] |= (1 << 1); } else { memcpy(&output[2 + g_usbd_video.probe.dwMaxPayloadTransferSize * i], &input[picture_pos], g_usbd_video.probe.dwMaxPayloadTransferSize - 2); |