#include <functional>
#include <mutex>
#include <thread>
+#include <vector>
+
+struct libusb_transfer;
// An interface for frame allocators; if you do not specify one
// (using set_video_frame_allocator), a default one that pre-allocates
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 card_index)
+ : card_index(card_index)
+ {
+ }
+
// Does not take ownership.
void set_video_frame_allocator(FrameAllocator *allocator)
{
frame_callback = callback;
}
+ // Needs to be run before configure_card().
+ void set_dequeue_thread_callbacks(std::function<void()> init, std::function<void()> cleanup)
+ {
+ dequeue_init_callback = init;
+ dequeue_cleanup_callback = cleanup;
+ has_dequeue_callbacks = true;
+ }
+
+ void configure_card();
void start_bm_capture();
- void stop_bm_capture();
+ void stop_dequeue_thread();
+
+ static void start_bm_thread();
+ static void stop_bm_thread();
private:
struct QueuedFrame {
void start_new_frame(const uint8_t *start);
void queue_frame(uint16_t format, uint16_t timecode, FrameAllocator::Frame frame, std::deque<QueuedFrame> *q);
- void dequeue_thread();
+ void dequeue_thread_func();
- void usb_thread_func();
+ static void usb_thread_func();
static void cb_xfr(struct libusb_transfer *xfr);
FrameAllocator::Frame current_video_frame;
std::deque<QueuedFrame> pending_video_frames;
std::deque<QueuedFrame> pending_audio_frames;
- std::thread usb_thread;
- std::atomic<bool> should_quit;
-
FrameAllocator *video_frame_allocator = nullptr;
FrameAllocator *audio_frame_allocator = nullptr;
frame_callback_t frame_callback = nullptr;
+ std::thread dequeue_thread;
+ std::atomic<bool> dequeue_thread_should_quit;
+ bool has_dequeue_callbacks = false;
+ std::function<void()> dequeue_init_callback = nullptr;
+ std::function<void()> dequeue_cleanup_callback = nullptr;
+
int current_register = 0;
static constexpr int NUM_BMUSB_REGISTERS = 60;
uint8_t register_file[NUM_BMUSB_REGISTERS];
+
+ 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