When the streaming option is called with a stateful decoder,
testUserPtr() and testDmaBuf() will hang indefinitely when attempting to
dequeue a source change event. To prevent this call select() with a
timeout.
Signed-off-by: Deborah Brouwer <deborah.brouwer@xxxxxxxxxxxxx>
---
It looks like this was the same issue that was previously fixed for testMmap()
in commit f0a5b17d9 ("v4l2-compliance: add timeout when waiting for event").
utils/v4l2-compliance/v4l2-test-buffers.cpp | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/utils/v4l2-compliance/v4l2-test-buffers.cpp b/utils/v4l2-compliance/v4l2-test-buffers.cpp
index a097a0ff..0396e17e 100644
--- a/utils/v4l2-compliance/v4l2-test-buffers.cpp
+++ b/utils/v4l2-compliance/v4l2-test-buffers.cpp
@@ -1746,8 +1746,17 @@ int testUserPtr(struct node *node, struct node *node_m2m_cap, unsigned frame_cou
if (node->is_m2m) {
if (node->codec_mask & STATEFUL_DECODER) {
+ int fd_flags = fcntl(node->g_fd(), F_GETFL);
+ struct timeval tv = { 1, 0 };
+ fd_set efds;
v4l2_event ev;
+ fcntl(node->g_fd(), F_SETFL, fd_flags | O_NONBLOCK);
+ FD_ZERO(&efds);
+ FD_SET(node->g_fd(), &efds);
+ ret = select(node->g_fd() + 1, nullptr, nullptr, &efds, &tv);
+ fail_on_test_val(ret < 0, ret);
+ fail_on_test(ret == 0);
fail_on_test(node->dqevent(ev));
fail_on_test(ev.type != V4L2_EVENT_SOURCE_CHANGE);
fail_on_test(!(ev.u.src_change.changes & V4L2_EVENT_SRC_CH_RESOLUTION));
@@ -1949,8 +1958,17 @@ int testDmaBuf(struct node *expbuf_node, struct node *node, struct node *node_m2
if (node->is_m2m) {
if (node->codec_mask & STATEFUL_DECODER) {
+ int fd_flags = fcntl(node->g_fd(), F_GETFL);
+ struct timeval tv = { 1, 0 };
+ fd_set efds;
v4l2_event ev;
+ fcntl(node->g_fd(), F_SETFL, fd_flags | O_NONBLOCK);
+ FD_ZERO(&efds);
+ FD_SET(node->g_fd(), &efds);
+ ret = select(node->g_fd() + 1, nullptr, nullptr, &efds, &tv);
+ fail_on_test_val(ret < 0, ret);
+ fail_on_test(ret == 0);
fail_on_test(node->dqevent(ev));
fail_on_test(ev.type != V4L2_EVENT_SOURCE_CHANGE);
fail_on_test(!(ev.u.src_change.changes & V4L2_EVENT_SRC_CH_RESOLUTION));
--
2.40.1
