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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-08-16 17:52:50 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-08-25 21:57:53 +0300
commitc671cbe622469185311fafce4b32b6b995a04445 (patch)
treeb0035607b2a1d47a3b00d8cd8e3165453bab8e6c /src/cam/buffer_writer.cpp
parent3bd19855459f6b58360197bc67c545a698812899 (diff)
cam: Limit file write to payload size
The payload size in a captured framebuffer is usually equal to the buffer size. However, for compressed formats, the payload may be smaller Only write the payload when capturing to a file. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src/cam/buffer_writer.cpp')
-rw-r--r--src/cam/buffer_writer.cpp12
1 files changed, 10 insertions, 2 deletions
diff --git a/src/cam/buffer_writer.cpp b/src/cam/buffer_writer.cpp
index c5a5eb46..f2b21aef 100644
--- a/src/cam/buffer_writer.cpp
+++ b/src/cam/buffer_writer.cpp
@@ -64,9 +64,17 @@ int BufferWriter::write(FrameBuffer *buffer, const std::string &streamName)
if (fd == -1)
return -errno;
- for (const FrameBuffer::Plane &plane : buffer->planes()) {
+ for (unsigned int i = 0; i < buffer->planes().size(); ++i) {
+ const FrameBuffer::Plane &plane = buffer->planes()[i];
+ const FrameMetadata::Plane &meta = buffer->metadata().planes[i];
+
void *data = mappedBuffers_[plane.fd.fd()].first;
- unsigned int length = plane.length;
+ unsigned int length = std::min(meta.bytesused, plane.length);
+
+ if (meta.bytesused > plane.length)
+ std::cerr << "payload size " << meta.bytesused
+ << " larger than plane size " << plane.length
+ << std::endl;
ret = ::write(fd, data, length);
if (ret < 0) {