+// 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)
+ {
+ video_frame_allocator = allocator;
+ }
+
+ FrameAllocator *get_video_frame_allocator()
+ {
+ return video_frame_allocator;
+ }
+
+ // Does not take ownership.
+ void set_audio_frame_allocator(FrameAllocator *allocator)
+ {
+ audio_frame_allocator = allocator;
+ }
+
+ FrameAllocator *get_audio_frame_allocator()
+ {
+ return audio_frame_allocator;
+ }
+
+ void set_frame_callback(frame_callback_t callback)
+ {
+ 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_dequeue_thread();
+
+ static void start_bm_thread();
+ static void stop_bm_thread();
+
+ private:
+ struct QueuedFrame {
+ uint16_t timecode;
+ uint16_t format;
+ FrameAllocator::Frame frame;
+ };
+
+ void start_new_audio_block(const uint8_t *start);
+ 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_func();
+
+ static void usb_thread_func();
+ static void cb_xfr(struct libusb_transfer *xfr);
+
+ FrameAllocator::Frame current_video_frame;
+ FrameAllocator::Frame current_audio_frame;
+
+ std::mutex queue_lock;
+ std::condition_variable queues_not_empty;
+ std::deque<QueuedFrame> pending_video_frames;
+ std::deque<QueuedFrame> pending_audio_frames;