X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=bmusb.h;h=4c7254bcb5dea6bb773381c510565cea37035839;hb=c753d698b047822c11f5f97b889649a3e582a4c9;hp=5b7c0f9c8e35a501c91bf40bdc81fb8d79f3770f;hpb=30a75fd8110601c89ecc7c1a0832a96878917cd4;p=bmusb

diff --git a/bmusb.h b/bmusb.h
index 5b7c0f9..4c7254b 100644
--- a/bmusb.h
+++ b/bmusb.h
@@ -6,11 +6,14 @@
 #include <condition_variable>
 #include <deque>
 #include <functional>
+#include <map>
 #include <mutex>
+#include <stack>
 #include <string>
 #include <thread>
 #include <vector>
 
+struct libusb_device_handle;
 struct libusb_transfer;
 
 // An interface for frame allocators; if you do not specify one
@@ -57,6 +60,36 @@ class FrameAllocator {
 	virtual void release_frame(Frame frame) = 0;
 };
 
+// Audio is more important than video, and also much cheaper.
+// By having many more audio frames available, hopefully if something
+// starts to drop, we'll have CPU load go down (from not having to
+// process as much video) before we have to drop audio.
+#define NUM_QUEUED_VIDEO_FRAMES 16
+#define NUM_QUEUED_AUDIO_FRAMES 64
+
+class MallocFrameAllocator : public FrameAllocator {
+public:
+	MallocFrameAllocator(size_t frame_size, size_t num_queued_frames);
+	Frame alloc_frame() override;
+	void release_frame(Frame frame) override;
+
+private:
+	size_t frame_size;
+
+	std::mutex freelist_mutex;
+	std::stack<std::unique_ptr<uint8_t[]>> freelist;  // All of size <frame_size>.
+};
+
+// Represents an input mode you can tune a card to.
+struct VideoMode {
+	std::string name;
+	bool autodetect = false;  // If true, all the remaining fields are irrelevant.
+	unsigned width = 0, height = 0;
+	unsigned frame_rate_num = 0, frame_rate_den = 0;
+	bool interlaced = false;
+};
+
+// Represents the format of an actual frame coming in.
 struct VideoFormat {
 	uint16_t id = 0;  // For debugging/logging only.
 	unsigned width = 0, height = 0, second_field_start = 0;
@@ -81,6 +114,18 @@ class CaptureInterface {
  public:
 	virtual ~CaptureInterface() {}
 
+	virtual std::map<uint32_t, VideoMode> get_available_video_modes() const = 0;
+	virtual uint32_t get_current_video_mode() const = 0;
+	virtual void set_video_mode(uint32_t video_mode_id) = 0;
+
+	virtual std::map<uint32_t, std::string> get_available_video_inputs() const = 0;
+	virtual void set_video_input(uint32_t video_input_id) = 0;
+	virtual uint32_t get_current_video_input() const = 0;
+
+	virtual std::map<uint32_t, std::string> get_available_audio_inputs() const = 0;
+	virtual void set_audio_input(uint32_t audio_input_id) = 0;
+	virtual uint32_t get_current_audio_input() const = 0;
+
 	// Does not take ownership.
 	virtual void set_video_frame_allocator(FrameAllocator *allocator) = 0;
 
@@ -116,10 +161,25 @@ class BMUSBCapture : public CaptureInterface {
 
 	~BMUSBCapture() {}
 
+	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
@@ -131,6 +191,9 @@ class BMUSBCapture : public CaptureInterface {
 	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
@@ -180,6 +243,8 @@ class BMUSBCapture : public CaptureInterface {
 	static void usb_thread_func();
 	static void cb_xfr(struct libusb_transfer *xfr);
 
+	void update_capture_mode();
+
 	std::string description;
 
 	FrameAllocator::Frame current_video_frame;
@@ -192,6 +257,8 @@ class BMUSBCapture : public CaptureInterface {
 
 	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;
 
 	std::thread dequeue_thread;
@@ -208,6 +275,10 @@ class BMUSBCapture : public CaptureInterface {
 	int card_index;
 	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.
 };
 
 // Get details for the given video format; returns false if detection was incomplete.