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| author | Dafna Hirschfeld <dafna.hirschfeld@collabora.com> | 2021-07-16 14:57:03 +0200 |
|---|---|---|
| committer | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2021-08-04 15:17:37 +0200 |
| commit | 7952c0042ccf549959cf924fbd3e7dd894966e57 (patch) | |
| tree | 5e4c8d38e889652767225469fc0685a7fbf895f1 | |
| parent | ac5c0dc4c24b5b956c3af58ccd1e524947610450 (diff) | |
| download | v4l-utils-7952c0042ccf549959cf924fbd3e7dd894966e57.tar.gz | |
v4l2-ctl: fix bugs found in streaming_set_cap2out
When exporting buffers from a capture device
to an output device. There are several bugs:
1. The bytesused are set from the exported buffer,
the value might be bigger than the length of the output buffer.
2. The file descriptor field 'm.fd' in 'struct v4l2_buffer' is not set.
This patch fix those issues.
Testing:
modprobe vimc
modprobe vivid
//configure vimc pipeline
media-ctl -d platform:vimc -V '"Sensor A":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d platform:vimc -V '"Debayer A":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d platform:vimc -V '"Sensor B":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d platform:vimc -V '"Debayer B":0[fmt:SBGGR8_1X8/640x480]'
v4l2-ctl -z platform:vimc -d "RGB/YUV Capture" -v width=1920,height=1440
v4l2-ctl -z platform:vimc -d "Raw Capture 0" -v pixelformat=BA81
v4l2-ctl -z platform:vimc -d "Raw Capture 1" -v pixelformat=BA81
// export buffers from vimc capture device (/dev/video2) to vivid output device (/dev/video4)
v4l2-ctl -d2 --stream-mmap --out-device /dev/video4 --stream-out-dmabuf
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
| -rw-r--r-- | utils/v4l2-ctl/v4l2-ctl-streaming.cpp | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp index 0f28a537..7e24e0ec 100644 --- a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp +++ b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp @@ -1499,6 +1499,11 @@ static int do_handle_out(cv4l_fd &fd, cv4l_queue &q, FILE *fin, cv4l_buffer *cap if (cap) { buf.s_index(cap->g_index()); + if (fd.querybuf(buf)) { + fprintf(stderr, "%s fd.querybuf failed\n", __func__); + return QUEUE_ERROR; + } + for (unsigned j = 0; j < buf.g_num_planes(); j++) { unsigned data_offset = cap->g_data_offset(j); @@ -1507,8 +1512,17 @@ static int do_handle_out(cv4l_fd &fd, cv4l_queue &q, FILE *fin, cv4l_buffer *cap buf.s_bytesused(cap->g_bytesused(j) - data_offset, j); buf.s_data_offset(0, j); } else if (q.g_memory() == V4L2_MEMORY_DMABUF) { - buf.s_bytesused(cap->g_bytesused(j), j); + __u32 bytesused = cap->g_bytesused(j); + /* + * bytesused comes from the exported cap buffer + * but the length of the out buffer might be smaller + * so take the smaller of the two + */ + if (bytesused > buf.g_length(j)) + bytesused = buf.g_length(j); + buf.s_bytesused(bytesused, j); buf.s_data_offset(data_offset, j); + buf.s_fd(q.g_fd(buf.g_index(), j)); } } } else { |