UVC摄像头技术笔记
USB3.0相机没有超高速端点伴随描述符引起该媒体无法播放
2025-02-11
35
0
前几天有人给了一个UVC相机，支持USB3.0协议，只不过因为种种原因，接入系统中，有一大半概率会被识别成USB2.0。本人在此之前也没有过多的问题，以为就是一个USB2.0相机，所以就继续做后续的windows驱动开发。驱动开发的功能也很简单，就是通过根据需要屏蔽配置描述符中不需要的格式和分辨率，只保留指定需要的。
别问需求为什么是这样的，需求就是这样子任性的。
其实从需求上来讲，方案有两种：
第一种是直接修改UVC输入头描述符的bNumFormats字段，然后再根据需要修改VS格式描述符中的bNumberFrameDescriptor字段。但他的前提条件是必须的格式和分辨率必须相对于其它的格式分辨率，必须置于最前端。这种直接篡改配置描述符的方法是最简单的，但是也是受固件配无思无虑描述符的设计限制。但是，你是知道的，求人办事，讲那么多，最后往往是一地鸡毛，更加上是远程沟通。
第二种是直接根据原有的配置描述符，直接伪造假假的配置描述符给主机，这样主机以为就只有伪造的配置描述符中描述的格式和分辨率，其它的没有上报，主机也就不知道，所以也就无从打开。另外，伪造配置描述符就如同虚拟相机一般，那对我们来说就如同呼吸一样自由自在。
说干就干，经过编码，调试，终于大功告成。按理说应该就可以了，但是实际上需求的变化，更换了硬件和更新了固件，这次拿到了正主USB3.0的设备。将原来的驱动加载上，用potplayer打开相机，竟出现无法显示图像：该媒体无法播放。
通过BUSHOUND抓包，发现了大量频繁的格式分辨率协商，但最终失败。
Device Length Phase Data Description Cmd.Phase.Ofs(rep) Time
------ -------- ----- ------------------------ ---------------- ------------------ ------------
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 1.1.0 10:33:26.811
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 1.2.0 10:33:26.811
00 00 00 00 00 00 00 00 ........ 1.2.8
00 00 00 46 05 00 00 48 ...F...H 1.2.16
00 00 .. 1.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 2.1.0 10:33:26.813
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 2.2.0 10:33:26.813
00 00 00 00 00 00 00 00 ........ 2.2.8
00 00 00 46 05 00 00 00 ...F.... 2.2.16
00 00 .. 2.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 3.1.0 10:33:26.813
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 3.2.0 10:33:26.814
00 00 00 00 00 00 00 00 ........ 3.2.8
00 00 00 46 05 00 00 48 ...F...H 3.2.16
00 00 .. 3.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 4.1.0 10:33:26.814
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 4.2.0 10:33:26.814
00 00 00 00 00 00 00 00 ........ 4.2.8
00 00 00 20 fd 00 00 48 ... ...H 4.2.16
00 00 .. 4.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 5.1.0 10:33:26.814
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 5.2.0 10:33:26.814
00 00 00 00 00 00 00 00 ........ 5.2.8
00 00 00 46 05 00 00 48 ...F...H 5.2.16
00 00 .. 5.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 6.1.0 10:33:26.815
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 6.2.0 10:33:26.815
00 00 00 00 00 00 00 00 ........ 6.2.8
00 00 00 46 05 00 00 48 ...F...H 6.2.16
00 00 .. 6.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 7.1.0 10:33:26.815
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 7.2.0 10:33:26.818
00 00 00 00 00 00 00 00 ........ 7.2.8
00 00 00 46 05 00 00 00 ...F.... 7.2.16
00 00 .. 7.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 8.1.0 10:33:26.818
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 8.2.0 10:33:26.818
00 00 00 00 00 00 00 00 ........ 8.2.8
00 00 00 46 05 00 00 48 ...F...H 8.2.16
00 00 .. 8.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 9.1.0 10:33:26.818
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 9.2.0 10:33:26.818
00 00 00 00 00 00 00 00 ........ 9.2.8
00 00 00 20 fd 00 00 48 ... ...H 9.2.16
00 00 .. 9.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 10.1.0 10:33:26.820
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 10.2.0 10:33:26.820
00 00 00 00 00 00 00 00 ........ 10.2.8
00 00 00 46 05 00 00 48 ...F...H 10.2.16
00 00 .. 10.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 11.1.0 10:33:26.820
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 11.2.0 10:33:26.822
00 00 00 00 00 00 00 00 ........ 11.2.8
00 00 00 46 05 00 00 48 ...F...H 11.2.16
00 00 .. 11.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 12.1.0 10:33:26.822
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 12.2.0 10:33:26.822
00 00 00 00 00 00 00 00 ........ 12.2.8
00 00 00 46 05 00 00 00 ...F.... 12.2.16
00 00 .. 12.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 13.1.0 10:33:26.822
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 13.2.0 10:33:26.822
00 00 00 00 00 00 00 00 ........ 13.2.8
00 00 00 46 05 00 00 48 ...F...H 13.2.16
00 00 .. 13.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 14.1.0 10:33:26.824
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 14.2.0 10:33:26.824
00 00 00 00 00 00 00 00 ........ 14.2.8
00 00 00 20 fd 00 00 48 ... ...H 14.2.16
00 00 .. 14.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 15.1.0 10:33:26.824
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 15.2.0 10:33:26.824
00 00 00 00 00 00 00 00 ........ 15.2.8
00 00 00 46 05 00 00 48 ...F...H 15.2.16
00 00 .. 15.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 16.1.0 10:33:26.824
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 16.2.0 10:33:26.824
00 00 00 00 00 00 00 00 ........ 16.2.8
00 00 00 46 05 00 00 48 ...F...H 16.2.16
00 00 .. 16.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 17.1.0 10:33:26.826
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 17.2.0 10:33:26.826
00 00 00 00 00 00 00 00 ........ 17.2.8
00 00 00 46 05 00 00 00 ...F.... 17.2.16
00 00 .. 17.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 18.1.0 10:33:26.826
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 18.2.0 10:33:26.826
00 00 00 00 00 00 00 00 ........ 18.2.8
00 00 00 46 05 00 00 48 ...F...H 18.2.16
00 00 .. 18.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 19.1.0 10:33:26.826
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 19.2.0 10:33:26.826
00 00 00 00 00 00 00 00 ........ 19.2.8
00 00 00 20 fd 00 00 48 ... ...H 19.2.16
00 00 .. 19.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 20.1.0 10:33:26.828
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 20.2.0 10:33:26.828
00 00 00 00 00 00 00 00 ........ 20.2.8
00 00 00 46 05 00 00 48 ...F...H 20.2.16
00 00 .. 20.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 21.1.0 10:33:26.828
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 21.2.0 10:33:26.828
00 00 00 00 00 00 00 00 ........ 21.2.8
00 00 00 46 05 00 00 48 ...F...H 21.2.16
00 00 .. 21.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 22.1.0 10:33:26.830
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 22.2.0 10:33:26.830
00 00 00 00 00 00 00 00 ........ 22.2.8
00 00 00 46 05 00 00 00 ...F.... 22.2.16
00 00 .. 22.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 23.1.0 10:33:26.830
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 23.2.0 10:33:26.830
00 00 00 00 00 00 00 00 ........ 23.2.8
00 00 00 46 05 00 00 48 ...F...H 23.2.16
00 00 .. 23.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 24.1.0 10:33:26.830
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 24.2.0 10:33:26.830
00 00 00 00 00 00 00 00 ........ 24.2.8
00 00 00 20 fd 00 00 48 ... ...H 24.2.16
00 00 .. 24.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 25.1.0 10:33:26.832
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 25.2.0 10:33:26.832
00 00 00 00 00 00 00 00 ........ 25.2.8
00 00 00 46 05 00 00 48 ...F...H 25.2.16
00 00 .. 25.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 26.1.0 10:33:27.450
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 26.2.0 10:33:27.450
00 00 00 00 00 00 00 00 ........ 26.2.8
00 00 00 46 05 00 00 48 ...F...H 26.2.16
00 00 .. 26.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 27.1.0 10:33:27.451
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 27.2.0 10:33:27.452
00 00 00 00 00 00 00 00 ........ 27.2.8
00 00 00 46 05 00 00 00 ...F.... 27.2.16
00 00 .. 27.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 28.1.0 10:33:27.452
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 28.2.0 10:33:27.452
00 00 00 00 00 00 00 00 ........ 28.2.8
00 00 00 46 05 00 00 48 ...F...H 28.2.16
00 00 .. 28.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 29.1.0 10:33:27.453
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 29.2.0 10:33:27.453
00 00 00 00 00 00 00 00 ........ 29.2.8
00 00 00 20 fd 00 00 48 ... ...H 29.2.16
00 00 .. 29.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 30.1.0 10:33:27.453
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 30.2.0 10:33:27.453
00 00 00 00 00 00 00 00 ........ 30.2.8
00 00 00 46 05 00 00 48 ...F...H 30.2.16
00 00 .. 30.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 31.1.0 10:33:27.547
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 31.2.0 10:33:27.547
00 00 00 00 00 00 00 00 ........ 31.2.8
00 00 00 46 05 00 00 48 ...F...H 31.2.16
00 00 .. 31.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 32.1.0 10:33:27.550
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 32.2.0 10:33:27.550
00 00 00 00 00 00 00 00 ........ 32.2.8
00 00 00 46 05 00 00 00 ...F.... 32.2.16
00 00 .. 32.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 33.1.0 10:33:27.550
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 33.2.0 10:33:27.550
00 00 00 00 00 00 00 00 ........ 33.2.8
00 00 00 46 05 00 00 48 ...F...H 33.2.16
00 00 .. 33.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 34.1.0 10:33:27.552
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 34.2.0 10:33:27.552
00 00 00 00 00 00 00 00 ........ 34.2.8
00 00 00 20 fd 00 00 48 ... ...H 34.2.16
00 00 .. 34.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 35.1.0 10:33:27.552
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 35.2.0 10:33:27.552
00 00 00 00 00 00 00 00 ........ 35.2.8
00 00 00 46 05 00 00 48 ...F...H 35.2.16
00 00 .. 35.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 36.1.0 10:33:27.554
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 36.2.0 10:33:27.554
00 00 00 00 00 00 00 00 ........ 36.2.8
00 00 00 46 05 00 00 48 ...F...H 36.2.16
00 00 .. 36.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 37.1.0 10:33:27.554
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 37.2.0 10:33:27.554
00 00 00 00 00 00 00 00 ........ 37.2.8
00 00 00 46 05 00 00 00 ...F.... 37.2.16
00 00 .. 37.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 38.1.0 10:33:27.554
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 38.2.0 10:33:27.555
00 00 00 00 00 00 00 00 ........ 38.2.8
00 00 00 46 05 00 00 48 ...F...H 38.2.16
00 00 .. 38.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 39.1.0 10:33:27.555
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 39.2.0 10:33:27.555
00 00 00 00 00 00 00 00 ........ 39.2.8
00 00 00 20 fd 00 00 48 ... ...H 39.2.16
00 00 .. 39.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 40.1.0 10:33:27.555
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 40.2.0 10:33:27.555
00 00 00 00 00 00 00 00 ........ 40.2.8
00 00 00 46 05 00 00 48 ...F...H 40.2.16
00 00 .. 40.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 41.1.0 10:33:27.557
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 41.2.0 10:33:27.557
00 00 00 00 00 00 00 00 ........ 41.2.8
00 00 00 46 05 00 00 48 ...F...H 41.2.16
00 00 .. 41.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 42.1.0 10:33:27.559
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 42.2.0 10:33:27.559
00 00 00 00 00 00 00 00 ........ 42.2.8
00 00 00 46 05 00 00 00 ...F.... 42.2.16
00 00 .. 42.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 43.1.0 10:33:27.559
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 43.2.0 10:33:27.559
00 00 00 00 00 00 00 00 ........ 43.2.8
00 00 00 46 05 00 00 48 ...F...H 43.2.16
00 00 .. 43.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 44.1.0 10:33:27.559
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 44.2.0 10:33:27.559
00 00 00 00 00 00 00 00 ........ 44.2.8
00 00 00 20 fd 00 00 48 ... ...H 44.2.16
00 00 .. 44.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 45.1.0 10:33:27.559
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 45.2.0 10:33:27.561
00 00 00 00 00 00 00 00 ........ 45.2.8
00 00 00 46 05 00 00 48 ...F...H 45.2.16
00 00 .. 45.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 46.1.0 10:33:27.561
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 46.2.0 10:33:27.561
00 00 00 00 00 00 00 00 ........ 46.2.8
00 00 00 46 05 00 00 48 ...F...H 46.2.16
00 00 .. 46.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 47.1.0 10:33:27.561
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 47.2.0 10:33:27.561
00 00 00 00 00 00 00 00 ........ 47.2.8
00 00 00 46 05 00 00 00 ...F.... 47.2.16
00 00 .. 47.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 48.1.0 10:33:27.564
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 48.2.0 10:33:27.564
00 00 00 00 00 00 00 00 ........ 48.2.8
00 00 00 46 05 00 00 48 ...F...H 48.2.16
00 00 .. 48.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 49.1.0 10:33:27.564
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 49.2.0 10:33:27.564
00 00 00 00 00 00 00 00 ........ 49.2.8
00 00 00 20 fd 00 00 48 ... ...H 49.2.16
00 00 .. 49.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 50.1.0 10:33:27.564
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 50.2.0 10:33:27.564
00 00 00 00 00 00 00 00 ........ 50.2.8
00 00 00 46 05 00 00 48 ...F...H 50.2.16
00 00 .. 50.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 51.1.0 10:33:27.565
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 51.2.0 10:33:27.565
00 00 00 00 00 00 00 00 ........ 51.2.8
00 00 00 46 05 00 00 48 ...F...H 51.2.16
00 00 .. 51.2.24
60.0 CTL 21 01 00 01 06 00 1a 00 SET CUR 52.1.0 10:33:27.565
60.0 26 OUT 01 00 01 01 15 16 05 00 ........ 52.2.0 10:33:27.565
00 00 00 00 00 00 00 00 ........ 52.2.8
00 00 00 46 05 00 00 00 ...F.... 52.2.16
00 00 .. 52.2.24
60.0 CTL a1 81 00 01 06 00 1a 00 GET CUR 53.1.0 10:33:27.565
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 53.2.0 10:33:27.565
00 00 00 00 00 00 00 00 ........ 53.2.8
00 00 00 46 05 00 00 48 ...F...H 53.2.16
00 00 .. 53.2.24
60.0 CTL a1 83 00 01 06 00 1a 00 GET MAX 54.1.0 10:33:27.569
60.0 26 IN 01 00 03 02 15 16 05 00 ........ 54.2.0 10:33:27.569
00 00 00 00 00 00 00 00 ........ 54.2.8
00 00 00 20 fd 00 00 48 ... ...H 54.2.16
00 00 .. 54.2.24
60.0 CTL a1 82 00 01 06 00 1a 00 GET MIN 55.1.0 10:33:27.569
60.0 26 IN 01 00 01 01 15 16 05 00 ........ 55.2.0 10:33:27.569
00 00 00 00 00 00 00 00 ........ 55.2.8
00 00 00 46 05 00 00 48 ...F...H 55.2.16
00 00 .. 55.2.24
大家可以偿试数一下，这是多少组重试。
从抓包可以看到，一直接有prob请求，但最终没有commit请求.
----------------------------------
UVC摄像头打开视频流
VS_PROBE_CONTROLL/VS_COMMIT_CONTROL数据协商在线分析
https://www.usbzh.com/tool/uvc.html
----------------------------------
============UVC1.0============
0x01, 0x00, UINT16 bmHint;dwFrameInterval保持不变;
0x01, UINT8 bFormatIndex=1,
0x01, UINT8 bFrameIndex=1,
0x15, 0x16, 0x05, 0x00, UINT32 dwFrameInterval=333333,;33.3333,ms/帧
0x00, 0x00, UINT16 wKeyFrameRate=0,;缩格式中只有第1帧为关键帧;
0x00, 0x00, UINT16 wPFrameRate=0,;压缩格式P帧速率;
0x00, 0x00, UINT16 wCompQuality=0,,压缩质量1-10000;
0x00, 0x00, UINT16 wCompWindowSize;0,,平均比特率控制的窗口大小;
0x00, 0x00, UINT16 wDelay;0,,内部视频流接口延迟（毫秒）;
0x00, 0x46, 0x05, 0x00, UINT32 dwMaxVideoFrameSize;345600,Bytes
0x00, 0x48, 0x00, 0x00, UINT32 dwMaxPayloadTransferSize;18432,Bytes
// 26 bytes
核对UVC1.0的协商字段信息：，核对几个常见的关键字段，比如formatIndex和FrameIndex也没有问题，那么问题是出现在哪里了？
经过思考，应该是出现了传输负载协商不一致的原因引起的，prob采用的是固件的信息，需我们上报信息是由端点描述符提供的，所以这种的不一致引起的。
所以这里问题是出现在了dwMaxPayloadTransferSize上。至于为什么不是dwMaxVideoFrameSize，这个是帧的大小，与传输的负载无关。
经过再对比配置描述符，发现竟少了超高速端点伴随描述符引起的，加上，就可以了。
数据传输是同步方式、
其实更加深放的研究，可以通过逆向usbvideo.sys其中协商过程中的代码来确定分析。
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