Add support for DeckLink HDMI/SDI output.

[nageru] / mixer.h

diff --git a/mixer.h b/mixer.h
index b5ae946575937dd6cb2bcacd29b8a831064a2173..58084817c70c9c78abef8ff9801ac71d9bd30778 100644 (file)
--- a/mixer.h
+++ b/mixer.h
@@ -38,6 +38,7 @@
 
 class ALSAOutput;
 class ChromaSubsampler;
+class DeckLinkOutput;
 class QSurface;
 class QSurfaceFormat;
 
@@ -285,7 +286,8 @@ public:
        }
 
 private:
-       void configure_card(unsigned card_index, bmusb::CaptureInterface *capture, bool is_fake_capture);
+       void configure_card(unsigned card_index, bmusb::CaptureInterface *capture, bool is_fake_capture, DeckLinkOutput *output);
+       void set_output_card(int card_index); // -1 = no output, just stream.
        void bm_frame(unsigned card_index, uint16_t timecode,
                bmusb::FrameAllocator::Frame video_frame, size_t video_offset, bmusb::VideoFormat video_format,
                bmusb::FrameAllocator::Frame audio_frame, size_t audio_offset, bmusb::AudioFormat audio_format);
@@ -303,11 +305,12 @@ private:
        HTTPD httpd;
        unsigned num_cards;
 
-       QSurface *mixer_surface, *h264_encoder_surface;
+       QSurface *mixer_surface, *h264_encoder_surface, *decklink_output_surface;
        std::unique_ptr<movit::ResourcePool> resource_pool;
        std::unique_ptr<Theme> theme;
        std::atomic<unsigned> audio_source_channel{0};
-       std::atomic<unsigned> master_clock_channel{0};
+       std::atomic<int> master_clock_channel{0};  // Gets overridden by <output_card_index> if set.
+       std::atomic<int> output_card_index{-1};  // -1 for none.
        std::unique_ptr<movit::EffectChain> display_chain;
        std::unique_ptr<ChromaSubsampler> chroma_subsampler;
        std::unique_ptr<VideoEncoder> video_encoder;
@@ -326,6 +329,15 @@ private:
        struct CaptureCard {
                bmusb::CaptureInterface *capture = nullptr;
                bool is_fake_capture;
+               DeckLinkOutput *output = nullptr;
+
+               // If this card is used for output (ie., output_card_index points to it),
+               // it cannot simultaneously be uesd for capture, so <capture> gets replaced
+               // by a FakeCapture. However, since reconstructing the real capture object
+               // with all its state can be annoying, it is not being deleted, just stopped
+               // and moved here.
+               bmusb::CaptureInterface *parked_capture = nullptr;
+
                std::unique_ptr<PBOFrameAllocator> frame_allocator;
 
                // Stuff for the OpenGL context (for texture uploading).
@@ -350,12 +362,13 @@ private:
        };
        CaptureCard cards[MAX_VIDEO_CARDS];  // Protected by <card_mutex>.
        AudioMixer audio_mixer;  // Same as global_audio_mixer (see audio_mixer.h).
+       bool input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const;
        struct OutputFrameInfo {
                int dropped_frames;  // Since last frame.
                int num_samples;  // Audio samples needed for this output frame.
                int64_t frame_duration;  // In TIMEBASE units.
        };
-       OutputFrameInfo get_one_frame_from_each_card(unsigned master_card_index, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS]);
+       OutputFrameInfo get_one_frame_from_each_card(unsigned master_card_index, bool master_card_is_output, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS]);
 
        InputState input_state;