Add a function to get video format details.

[bmusb] / bmusb.h

diff --git a/bmusb.h b/bmusb.h
index b2725ab76dc5154e04a3b57797ed21c5182231f6..9eb3ff4f716a4ede88c997f65131c6fe69232179 100644 (file)
--- a/bmusb.h
+++ b/bmusb.h
@@ -64,8 +64,8 @@ typedef std::function<void(uint16_t timecode,
 // 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)
        {
        }
 
@@ -150,8 +150,12 @@ class BMUSBCapture {
        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;
 };
 
+// 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.
+bool decode_video_format(uint16_t video_format, int *width, int *height, int *frame_rate_nom, int *frame_rate_den, bool *interlaced);
+
 #endif