diff options
| -rw-r--r-- | v4l2.c | 15 |
1 files changed, 14 insertions, 1 deletions
@@ -631,13 +631,26 @@ int v4l2_export_buffers(struct v4l2_device *dev) .type = dev->type, .index = i, }; + struct v4l2_buffer buf = { + .index = i, + .type = dev->type, + .memory = dev->memtype, + }; + + ret = ioctl(dev->fd, VIDIOC_QUERYBUF, &buf); + if (ret < 0) { + printf("%s: unable to query buffer %u (%d).\n", + dev->name, i, errno); + return -errno; + } ret = ioctl(dev->fd, VIDIOC_EXPBUF, &expbuf); if (ret < 0) { printf("Failed to export buffer %u.\n", i); - return ret; + return -errno; } + dev->buffers[i].size = buf.length; dev->buffers[i].dmabuf = expbuf.fd; printf("%s: buffer %u exported with fd %u.\n", |