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 <map>
   9 #include <memory>
  10 #include <string>
  11
  12 #include "DeckLinkAPIModes.h"
  13 #include "DeckLinkAPITypes.h"
  14 #include "LinuxCOM.h"
  15 #include "bmusb/bmusb.h"
  16
  17 class IDeckLink;
  18 class IDeckLinkConfiguration;
  19
  20 // TODO: Adjust CaptureInterface to be a little less bmusb-centric.
  21 // There are too many member functions here that don't really do anything.
  22 class DeckLinkCapture : public bmusb::CaptureInterface, IDeckLinkInputCallback
  23 {
  24 public:
  25         DeckLinkCapture(IDeckLink *card, int card_index);  // Takes ownership of <card>.
  26         ~DeckLinkCapture();
  27
  28         // IDeckLinkInputCallback.
  29         HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, LPVOID *) override;
  30         ULONG STDMETHODCALLTYPE AddRef() override;
  31         ULONG STDMETHODCALLTYPE Release() override;
  32         HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(
  33                 BMDVideoInputFormatChangedEvents,
  34                 IDeckLinkDisplayMode*,
  35                 BMDDetectedVideoInputFormatFlags) override;
  36         HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(
  37                 IDeckLinkVideoInputFrame *video_frame,
  38                 IDeckLinkAudioInputPacket *audio_frame) override;
  39
  40         // CaptureInterface.
  41         void set_video_frame_allocator(bmusb::FrameAllocator *allocator) override
  42         {
  43                 video_frame_allocator = allocator;
  44                 if (owned_video_frame_allocator.get() != allocator) {
  45                         owned_video_frame_allocator.reset();
  46                 }
  47         }
  48
  49         bmusb::FrameAllocator *get_video_frame_allocator() override
  50         {
  51                 return video_frame_allocator;
  52         }
  53
  54         // Does not take ownership.
  55         void set_audio_frame_allocator(bmusb::FrameAllocator *allocator) override
  56         {
  57                 audio_frame_allocator = allocator;
  58                 if (owned_audio_frame_allocator.get() != allocator) {
  59                         owned_audio_frame_allocator.reset();
  60                 }
  61         }
  62
  63         bmusb::FrameAllocator *get_audio_frame_allocator() override
  64         {
  65                 return audio_frame_allocator;
  66         }
  67
  68         void set_frame_callback(bmusb::frame_callback_t callback) override
  69         {
  70                 frame_callback = callback;
  71         }
  72
  73         void set_dequeue_thread_callbacks(std::function<void()> init, std::function<void()> cleanup) override
  74         {
  75                 dequeue_init_callback = init;
  76                 dequeue_cleanup_callback = cleanup;
  77                 has_dequeue_callbacks = true;
  78         }
  79
  80         std::string get_description() const override
  81         {
  82                 return description;
  83         }
  84
  85         void configure_card() override;
  86         void start_bm_capture() override;
  87         void stop_dequeue_thread() override;
  88
  89         // TODO: Can the API communicate this to us somehow, for e.g. Thunderbolt cards?
  90         bool get_disconnected() const override { return false; }
  91
  92         std::map<uint32_t, bmusb::VideoMode> get_available_video_modes() const override { return video_modes; }
  93         void set_video_mode(uint32_t video_mode_id) override;
  94         uint32_t get_current_video_mode() const override { return current_video_mode; }
  95
  96         std::map<uint32_t, std::string> get_available_video_inputs() const override { return video_inputs; }
  97         void set_video_input(uint32_t video_input_id) override;
  98         uint32_t get_current_video_input() const override { return current_video_input; }
  99
 100         std::map<uint32_t, std::string> get_available_audio_inputs() const override { return audio_inputs; }
 101         void set_audio_input(uint32_t audio_input_id) override;
 102         uint32_t get_current_audio_input() const override { return current_audio_input; }
 103
 104 private:
 105         void set_video_mode_no_restart(uint32_t video_mode_id);
 106
 107         std::atomic<int> refcount{1};
 108         bool done_init = false;
 109         std::string description;
 110         uint16_t timecode = 0;
 111         int card_index;
 112
 113         bool has_dequeue_callbacks = false;
 114         std::function<void()> dequeue_init_callback = nullptr;
 115         std::function<void()> dequeue_cleanup_callback = nullptr;
 116
 117         bmusb::FrameAllocator *video_frame_allocator = nullptr;
 118         bmusb::FrameAllocator *audio_frame_allocator = nullptr;
 119         std::unique_ptr<bmusb::FrameAllocator> owned_video_frame_allocator;
 120         std::unique_ptr<bmusb::FrameAllocator> owned_audio_frame_allocator;
 121         bmusb::frame_callback_t frame_callback = nullptr;
 122
 123         IDeckLinkConfiguration *config = nullptr;
 124
 125         IDeckLink *card = nullptr;
 126         IDeckLinkInput *input = nullptr;
 127         BMDTimeValue frame_duration;
 128         BMDTimeScale time_scale;
 129
 130         std::map<uint32_t, bmusb::VideoMode> video_modes;
 131         BMDDisplayMode current_video_mode;
 132
 133         std::map<uint32_t, std::string> video_inputs;
 134         BMDVideoConnection current_video_input;
 135
 136         std::map<uint32_t, std::string> audio_inputs;
 137         BMDAudioConnection current_audio_input;
 138 };
 139
 140 #endif  // !defined(_DECKLINK_CAPTURE_H)