Rework signal connection in preparations for deinterlacing.

[nageru] / mixer.h

diff --git a/mixer.h b/mixer.h
index 76aec682c5d71773c7d3909de60ed2d9a58a76a8..b9acfc4c607e2a9b880ef8dea5bc7867da9fa286 100644 (file)
--- a/mixer.h
+++ b/mixer.h
@@ -170,6 +170,16 @@ public:
 
        void reset_meters();
 
+       struct BufferedFrame {
+               RefCountedFrame frame;
+               unsigned field_number;
+       };
+
+       BufferedFrame get_buffered_frame(int card, int history_pos)
+       {
+               return buffered_frames[card][history_pos];
+       }
+
 private:
        void bm_frame(unsigned card_index, uint16_t timecode,
                FrameAllocator::Frame video_frame, size_t video_offset, uint16_t video_format,
@@ -210,7 +220,8 @@ private:
                bool should_quit = false;
                RefCountedFrame new_frame;
                int64_t new_frame_length;  // In TIMEBASE units.
-               unsigned new_frame_field;  // Which field (0 or 1) of the frame to use.
+               bool new_frame_interlaced;
+               unsigned new_frame_field;  // Which field (0 or 1) of the frame to use. Always 0 for progressive.
                GLsync new_data_ready_fence;  // Whether new_frame is ready for rendering.
                std::condition_variable new_data_ready_changed;  // Set whenever new_data_ready is changed.
                unsigned dropped_frames = 0;  // Before new_frame.
@@ -226,7 +237,12 @@ private:
        };
        CaptureCard cards[MAX_CARDS];  // protected by <bmusb_mutex>
 
-       RefCountedFrame bmusb_current_rendering_frame[MAX_CARDS];
+       // For each card, the last three frames (or fields), with 0 being the
+       // most recent one. Note that we only need the actual history if we have
+       // interlaced output (for deinterlacing), so if we detect progressive input,
+       // we immediately clear out all history and all entries will point to the same
+       // frame.
+       BufferedFrame buffered_frames[MAX_CARDS][FRAME_HISTORY_LENGTH];
 
        class OutputChannel {
        public: