+ std::map<uint32_t, VideoMode> get_available_video_modes() const override;
+ uint32_t get_current_video_mode() const override;
+ void set_video_mode(uint32_t video_mode_id) override;
+
+ virtual std::map<uint32_t, std::string> get_available_video_inputs() const override;
+ virtual void set_video_input(uint32_t video_input_id) override;
+ virtual uint32_t get_current_video_input() const override { return current_video_input; }
+
+ virtual std::map<uint32_t, std::string> get_available_audio_inputs() const override;
+ virtual void set_audio_input(uint32_t audio_input_id) override;
+ virtual uint32_t get_current_audio_input() const override { return current_audio_input; }
+
+ // Does not take ownership.
+ void set_video_frame_allocator(FrameAllocator *allocator) override
+ {
+ video_frame_allocator = allocator;
+ if (owned_video_frame_allocator.get() != allocator) {
+ owned_video_frame_allocator.reset();
+ }
+ }
+
+ FrameAllocator *get_video_frame_allocator() override
+ {
+ return video_frame_allocator;
+ }
+
+ // Does not take ownership.
+ void set_audio_frame_allocator(FrameAllocator *allocator) override
+ {
+ audio_frame_allocator = allocator;
+ if (owned_audio_frame_allocator.get() != allocator) {
+ owned_audio_frame_allocator.reset();
+ }
+ }
+
+ FrameAllocator *get_audio_frame_allocator() override
+ {
+ return audio_frame_allocator;
+ }
+
+ void set_frame_callback(frame_callback_t callback) override
+ {
+ frame_callback = callback;
+ }
+
+ // Needs to be run before configure_card().
+ void set_dequeue_thread_callbacks(std::function<void()> init, std::function<void()> cleanup) override
+ {
+ dequeue_init_callback = init;
+ dequeue_cleanup_callback = cleanup;
+ has_dequeue_callbacks = true;
+ }
+
+ // Only valid after configure_card().
+ std::string get_description() const override {
+ return description;
+ }
+
+ void configure_card() override;
+ void start_bm_capture() override;
+ void stop_dequeue_thread() override;
+ bool get_disconnected() const override { return disconnected; }
+
+ // TODO: It's rather messy to have these outside the interface.
+ static void start_bm_thread();
+ static void stop_bm_thread();
+
+ // Hotplug event (for devices being inserted between start_bm_thread()
+ // and stop_bm_thread()); entirely optional, but must be set before
+ // start_bm_capture(). Note that your callback should do as little work
+ // as possible, since the callback comes from the main USB handling
+ // thread, which is very time-sensitive.
+ //
+ // The callback function transfers ownership. If you don't want to hold
+ // on to the device given to you in the callback, you need to call
+ // libusb_unref_device().
+ static void set_card_connected_callback(card_connected_callback_t callback)
+ {
+ card_connected_callback = callback;
+ }
+
+ // Similar to set_card_connected_callback(), with the same caveats.
+ // (Note that this is set per-card and not global, as it is logically
+ // connected to an existing BMUSBCapture object.)
+ void set_card_disconnected_callback(card_disconnected_callback_t callback)
+ {
+ card_disconnected_callback = callback;
+ }
+
+ 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);
+ static int cb_hotplug(libusb_context *ctx, libusb_device *dev, libusb_hotplug_event event, void *user_data);
+
+ void update_capture_mode();
+
+ std::string description;
+
+ 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;
+
+ FrameAllocator *video_frame_allocator = nullptr;
+ FrameAllocator *audio_frame_allocator = nullptr;
+ std::unique_ptr<FrameAllocator> owned_video_frame_allocator;
+ std::unique_ptr<FrameAllocator> owned_audio_frame_allocator;
+ frame_callback_t frame_callback = nullptr;
+ static card_connected_callback_t card_connected_callback;
+ card_disconnected_callback_t card_disconnected_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];
+
+ // If <dev> is nullptr, will choose device number <card_index> from the list
+ // of available devices on the system. <dev> is not used after configure_card()
+ // (it will be unref-ed).
+ int card_index = -1;
+ libusb_device *dev = nullptr;
+
+ std::vector<libusb_transfer *> iso_xfrs;
+ int assumed_frame_width = 1280;
+
+ libusb_device_handle *devh = nullptr;
+ uint32_t current_video_input = 0x00000000; // HDMI/SDI.
+ uint32_t current_audio_input = 0x00000000; // Embedded.
+
+ bool disconnected = false;
+};