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 CaptureInterface, IDeckLinkInputCallback
  18 {
  19 public:
  20         DeckLinkCapture(IDeckLink *card, int card_index);
  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(FrameAllocator *allocator) override
  37         {
  38                 video_frame_allocator = allocator;
  39         }
  40
  41         FrameAllocator *get_video_frame_allocator() override
  42         {
  43                 return video_frame_allocator;
  44         }
  45
  46         // Does not take ownership.
  47         void set_audio_frame_allocator(FrameAllocator *allocator) override
  48         {
  49                 audio_frame_allocator = allocator;
  50         }
  51
  52         FrameAllocator *get_audio_frame_allocator() override
  53         {
  54                 return audio_frame_allocator;
  55         }
  56
  57         void set_frame_callback(frame_callback_t callback) override
  58         {
  59                 frame_callback = callback;
  60         }
  61
  62         void set_dequeue_thread_callbacks(std::function<void()> init, std::function<void()> cleanup) override
  63         {
  64                 dequeue_init_callback = init;
  65                 dequeue_cleanup_callback = cleanup;
  66                 has_dequeue_callbacks = true;
  67         }
  68
  69         std::string get_description() const override
  70         {
  71                 return description;
  72         }
  73
  74         void configure_card() override {}
  75         void start_bm_capture() override;
  76         void stop_dequeue_thread() override;
  77
  78 private:
  79         std::atomic<int> refcount{1};
  80         bool done_init = false;
  81         std::string description;
  82         uint16_t timecode = 0;
  83
  84         bool has_dequeue_callbacks = false;
  85         std::function<void()> dequeue_init_callback = nullptr;
  86         std::function<void()> dequeue_cleanup_callback = nullptr;
  87
  88         FrameAllocator *video_frame_allocator = nullptr;
  89         FrameAllocator *audio_frame_allocator = nullptr;
  90         frame_callback_t frame_callback = nullptr;
  91
  92         IDeckLinkInput *input = nullptr;
  93         BMDTimeValue frame_duration;
  94         BMDTimeScale time_scale;
  95 };
  96
  97 #endif  // !defined(_DECKLINK_CAPTURE_H)