git.sesse.net Git - bmusb/blob - main.cpp

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include "bmusb/bmusb.h"
   4
   5 using namespace std;
   6 using namespace bmusb;
   7
   8 BMUSBCapture *usb;
   9
  10 void check_frame_stability(uint16_t timecode,
  11                            FrameAllocator::Frame video_frame, size_t video_offset, VideoFormat video_format,
  12                            FrameAllocator::Frame audio_frame, size_t audio_offset, AudioFormat audio_format)
  13 {
  14         //printf("0x%04x: %d video bytes (format 0x%04x), %d audio bytes (format 0x%04x)\n",
  15         //      timecode, video_end - video_start, video_format.id, audio_end - audio_start, audio_format.id);
  16
  17         static uint16_t last_timecode = 0;
  18         static size_t last_video_bytes = 0;
  19         static size_t last_audio_bytes = 0;
  20
  21         if (!(last_timecode == 0 && last_video_bytes == 0 && last_audio_bytes == 0)) {
  22                 if (timecode != (uint16_t)(last_timecode + 1)) {
  23                         printf("0x%04x: Dropped %d frames\n", timecode, timecode - last_timecode - 1);
  24                 } else if (last_video_bytes != video_frame.len - video_offset) {
  25                         printf("0x%04x: Video frame size changed (old=%ld, cur=%ld)\n", timecode,
  26                                 last_video_bytes, video_frame.len - video_offset);
  27                 } else if (last_audio_bytes != audio_frame.len - audio_offset) {
  28                         printf("0x%04x: Audio block size changed (old=%ld, cur=%ld)\n", timecode,
  29                                 last_audio_bytes, audio_frame.len - audio_offset);
  30                 }
  31         }
  32         last_timecode = timecode;
  33         last_video_bytes = video_frame.len - video_offset;
  34         last_audio_bytes = audio_frame.len - audio_offset;
  35
  36         usb->get_video_frame_allocator()->release_frame(video_frame);
  37         usb->get_audio_frame_allocator()->release_frame(audio_frame);
  38 }
  39
  40 int main(int argc, char **argv)
  41 {
  42         usb = new BMUSBCapture(0);  // First card.
  43         usb->set_frame_callback(check_frame_stability);
  44         usb->configure_card();
  45         BMUSBCapture::start_bm_thread();
  46         usb->start_bm_capture();
  47         sleep(1000000);
  48 }
  49