uint8_t *data2 = nullptr; // Only if interleaved == true.
size_t len = 0; // Number of bytes we actually have.
size_t size = 0; // Number of bytes we have room for.
+ size_t overflow = 0;
void *userdata = nullptr;
FrameAllocator *owner = nullptr;
// The actual capturing class, representing capture from a single card.
class BMUSBCapture {
public:
- BMUSBCapture(int vid = 0x1edb, int pid = 0xbd3b)
- : vid(vid), pid(pid)
+ BMUSBCapture(int card_index)
+ : card_index(card_index)
{
}
static constexpr int NUM_BMUSB_REGISTERS = 60;
uint8_t register_file[NUM_BMUSB_REGISTERS];
- int vid, pid;
+ int card_index;
std::vector<libusb_transfer *> iso_xfrs;
+ int assumed_frame_width = 1280;
};
+// Get details for the given video format; returns false if detection was incomplete.
+// Note: Frame rate is _frame_ rate, not field rate. So 1080i60 gets 30/1, _not_ 60/1.
+// "second_field_start" is only valid for interlaced modes; it signifies
+// how many lines from the very top of the frame there are before the second field
+// starts (so it will always be >= height/2 + extra_lines_top).
+bool decode_video_format(uint16_t video_format, unsigned *width, unsigned *height, unsigned *second_field_start,
+ unsigned *extra_lines_top, unsigned *extra_lines_bottom,
+ unsigned *frame_rate_nom, unsigned *frame_rate_den, bool *interlaced);
+
#endif