diff options
Diffstat (limited to 'yavta.c')
| -rw-r--r-- | yavta.c | 27 |
1 files changed, 12 insertions, 15 deletions
@@ -814,8 +814,8 @@ static int video_do_capture(struct device *dev, unsigned int nframes, int do_requeue_last) { char *filename = NULL; - struct timeval start = { 0, 0 }; - struct timeval end, ts; + struct timeval start; + struct timeval ts; struct v4l2_buffer buf; unsigned int size; unsigned int i; @@ -834,6 +834,7 @@ static int video_do_capture(struct device *dev, unsigned int nframes, video_enable(dev, 1); size = 0; + gettimeofday(&start, NULL); for (i = 0; i < nframes; ++i) { /* Dequeue a buffer. */ @@ -865,9 +866,6 @@ static int video_do_capture(struct device *dev, unsigned int nframes, buf.sequence, buf.bytesused, buf.timestamp.tv_sec, buf.timestamp.tv_usec, ts.tv_sec, ts.tv_usec); - if (i == 0) - start = ts; - /* Save the image. */ if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && filename_prefix && !skip) { sprintf(filename, "%s-%06u.bin", filename_prefix, i); @@ -895,7 +893,6 @@ static int video_do_capture(struct device *dev, unsigned int nframes, goto done; } } - gettimeofday(&end, NULL); /* Stop streaming. */ video_enable(dev, 0); @@ -905,21 +902,21 @@ static int video_do_capture(struct device *dev, unsigned int nframes, goto done; } - if (end.tv_sec == start.tv_sec && end.tv_usec == start.tv_usec) + if (ts.tv_sec == start.tv_sec && ts.tv_usec == start.tv_usec) goto done; - end.tv_sec -= start.tv_sec; - end.tv_usec -= start.tv_usec; - if (end.tv_usec < 0) { - end.tv_sec--; - end.tv_usec += 1000000; + ts.tv_sec -= start.tv_sec; + ts.tv_usec -= start.tv_usec; + if (ts.tv_usec < 0) { + ts.tv_sec--; + ts.tv_usec += 1000000; } - bps = size/(end.tv_usec+1000000.0*end.tv_sec)*1000000.0; - fps = (i-1)/(end.tv_usec+1000000.0*end.tv_sec)*1000000.0; + bps = size/(ts.tv_usec+1000000.0*ts.tv_sec)*1000000.0; + fps = i/(ts.tv_usec+1000000.0*ts.tv_sec)*1000000.0; printf("Captured %u frames in %lu.%06lu seconds (%f fps, %f B/s).\n", - i-1, end.tv_sec, end.tv_usec, fps, bps); + i, ts.tv_sec, ts.tv_usec, fps, bps); done: free(filename); |