diff options
Diffstat (limited to 'src/cam/capture.cpp')
| -rw-r--r-- | src/cam/capture.cpp | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/src/cam/capture.cpp b/src/cam/capture.cpp index af9029b7..5510c009 100644 --- a/src/cam/capture.cpp +++ b/src/cam/capture.cpp @@ -5,7 +5,6 @@ * capture.cpp - Cam capture */ -#include <chrono> #include <iomanip> #include <iostream> #include <limits.h> @@ -159,14 +158,19 @@ void Capture::requestComplete(Request *request) const Request::BufferMap &buffers = request->buffers(); - std::chrono::steady_clock::time_point now = std::chrono::steady_clock::now(); - double fps = std::chrono::duration_cast<std::chrono::milliseconds>(now - last_).count(); - fps = last_ != std::chrono::steady_clock::time_point() && fps - ? 1000.0 / fps : 0.0; - last_ = now; + /* + * Compute the frame rate. The timestamp is arbitrarily retrieved from + * the first buffer, as all buffers should have matching timestamps. + */ + uint64_t ts = buffers.begin()->second->metadata().timestamp; + double fps = ts - last_; + fps = last_ != 0 && fps ? 1000000000.0 / fps : 0.0; + last_ = ts; std::stringstream info; - info << "fps: " << std::fixed << std::setprecision(2) << fps; + info << ts / 1000000000 << "." + << std::setw(6) << std::setfill('0') << ts / 1000 % 1000000 + << " (" << std::fixed << std::setprecision(2) << fps << " fps)"; for (auto it = buffers.begin(); it != buffers.end(); ++it) { const Stream *stream = it->first; |