git.sesse.net Git - nageru/blob - decklink_capture.h

   1 #ifndef _DECKLINK_CAPTURE_H
   2 #define _DECKLINK_CAPTURE_H 1
   3
   4 #include <DeckLinkAPI.h>
   5 #include <stdint.h>
   6 #include <atomic>
   7 #include <functional>
   8 #include <string>
   9
  10 #include "bmusb/bmusb.h"
  11
  12 class IDeckLink;
  13 class IDeckLinkDisplayMode;
  14
  15 // TODO: Adjust CaptureInterface to be a little less bmusb-centric.
  16 // There are too many member functions here that don't really do anything.
  17 class DeckLinkCapture : public bmusb::CaptureInterface, IDeckLinkInputCallback
  18 {
  19 public:
  20         DeckLinkCapture(IDeckLink *card, int card_index);  // Takes ownership of <card>.
  21         ~DeckLinkCapture();
  22
  23         // IDeckLinkInputCallback.
  24         HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, LPVOID *) override;
  25         ULONG STDMETHODCALLTYPE AddRef() override;
  26         ULONG STDMETHODCALLTYPE Release() override;
  27         HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(
  28                 BMDVideoInputFormatChangedEvents,
  29                 IDeckLinkDisplayMode*,
  30                 BMDDetectedVideoInputFormatFlags) override;
  31         HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(
  32                 IDeckLinkVideoInputFrame *video_frame,
  33                 IDeckLinkAudioInputPacket *audio_frame) override;
  34
  35         // CaptureInterface.
  36         void set_video_frame_allocator(bmusb::FrameAllocator *allocator) override
  37         {
  38                 video_frame_allocator = allocator;
  39                 if (owned_video_frame_allocator.get() != allocator) {
  40                         owned_video_frame_allocator.reset();
  41                 }
  42         }
  43
  44         bmusb::FrameAllocator *get_video_frame_allocator() override
  45         {
  46                 return video_frame_allocator;
  47         }
  48
  49         // Does not take ownership.
  50         void set_audio_frame_allocator(bmusb::FrameAllocator *allocator) override
  51         {
  52                 audio_frame_allocator = allocator;
  53                 if (owned_audio_frame_allocator.get() != allocator) {
  54                         owned_audio_frame_allocator.reset();
  55                 }
  56         }
  57
  58         bmusb::FrameAllocator *get_audio_frame_allocator() override
  59         {
  60                 return audio_frame_allocator;
  61         }
  62
  63         void set_frame_callback(bmusb::frame_callback_t callback) override
  64         {
  65                 frame_callback = callback;
  66         }
  67
  68         void set_dequeue_thread_callbacks(std::function<void()> init, std::function<void()> cleanup) override
  69         {
  70                 dequeue_init_callback = init;
  71                 dequeue_cleanup_callback = cleanup;
  72                 has_dequeue_callbacks = true;
  73         }
  74
  75         std::string get_description() const override
  76         {
  77                 return description;
  78         }
  79
  80         void configure_card() override;
  81         void start_bm_capture() override;
  82         void stop_dequeue_thread() override;
  83
  84         // TODO: Can the API communicate this to us somehow, for e.g. Thunderbolt cards?
  85         bool get_disconnected() const override { return false; }
  86
  87         std::map<uint32_t, bmusb::VideoMode> get_available_video_modes() const override { return video_modes; }
  88         void set_video_mode(uint32_t video_mode_id) override;
  89         uint32_t get_current_video_mode() const override { return current_video_mode; }
  90
  91         std::map<uint32_t, std::string> get_available_video_inputs() const override { return video_inputs; }
  92         void set_video_input(uint32_t video_input_id) override;
  93         uint32_t get_current_video_input() const override { return current_video_input; }
  94
  95         std::map<uint32_t, std::string> get_available_audio_inputs() const override { return audio_inputs; }
  96         void set_audio_input(uint32_t audio_input_id) override;
  97         uint32_t get_current_audio_input() const override { return current_audio_input; }
  98
  99 private:
 100         void set_video_mode_no_restart(uint32_t video_mode_id);
 101
 102         std::atomic<int> refcount{1};
 103         bool done_init = false;
 104         std::string description;
 105         uint16_t timecode = 0;
 106         int card_index;
 107
 108         bool has_dequeue_callbacks = false;
 109         std::function<void()> dequeue_init_callback = nullptr;
 110         std::function<void()> dequeue_cleanup_callback = nullptr;
 111
 112         bmusb::FrameAllocator *video_frame_allocator = nullptr;
 113         bmusb::FrameAllocator *audio_frame_allocator = nullptr;
 114         std::unique_ptr<bmusb::FrameAllocator> owned_video_frame_allocator;
 115         std::unique_ptr<bmusb::FrameAllocator> owned_audio_frame_allocator;
 116         bmusb::frame_callback_t frame_callback = nullptr;
 117
 118         IDeckLinkConfiguration *config = nullptr;
 119
 120         IDeckLink *card = nullptr;
 121         IDeckLinkInput *input = nullptr;
 122         BMDTimeValue frame_duration;
 123         BMDTimeScale time_scale;
 124
 125         std::map<uint32_t, bmusb::VideoMode> video_modes;
 126         BMDDisplayMode current_video_mode;
 127
 128         std::map<uint32_t, std::string> video_inputs;
 129         BMDVideoConnection current_video_input;
 130
 131         std::map<uint32_t, std::string> audio_inputs;
 132         BMDAudioConnection current_audio_input;
 133 };
 134
 135 #endif  // !defined(_DECKLINK_CAPTURE_H)