Add support for DeckLink HDMI/SDI output.

[nageru] / mixer.h

diff --git a/mixer.h b/mixer.h
index 0de651915f6fe9aa0a3c268fd993121b9e3c3dbf..58084817c70c9c78abef8ff9801ac71d9bd30778 100644 (file)
--- a/mixer.h
+++ b/mixer.h
@@ -37,7 +37,10 @@
 #include "video_encoder.h"
 
 class ALSAOutput;
+class ChromaSubsampler;
+class DeckLinkOutput;
 class QSurface;
+class QSurfaceFormat;
 
 namespace movit {
 class Effect;
@@ -45,7 +48,6 @@ class EffectChain;
 class FlatInput;
 class ResourcePool;
 }  // namespace movit
-class QSurfaceFormat;
 
 // For any card that's not the master (where we pick out the frames as they
 // come, as fast as we can process), there's going to be a queue. The question
@@ -284,7 +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);
@@ -296,23 +299,20 @@ private:
        void schedule_audio_resampling_tasks(unsigned dropped_frames, int num_samples_per_frame, int length_per_frame);
        void render_one_frame(int64_t duration);
        void audio_thread_func();
-       void subsample_chroma(GLuint src_tex, GLuint dst_dst);
        void release_display_frame(DisplayFrame *frame);
        double pts() { return double(pts_int) / TIMEBASE; }
 
        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;
-       GLuint cbcr_program_num;  // Owned by <resource_pool>.
-       GLuint cbcr_texture_sampler_uniform;
-       GLuint cbcr_vbo;  // Holds position and texcoord data.
-       GLuint cbcr_position_attribute_index, cbcr_texcoord_attribute_index;
+       std::unique_ptr<ChromaSubsampler> chroma_subsampler;
        std::unique_ptr<VideoEncoder> video_encoder;
 
        // Effects part of <display_chain>. Owned by <display_chain>.
@@ -320,11 +320,24 @@ private:
 
        int64_t pts_int = 0;  // In TIMEBASE units.
 
-       std::mutex bmusb_mutex;
+       // Accumulated errors in number of 1/TIMEBASE audio samples. If OUTPUT_FREQUENCY divided by
+       // frame rate is integer, will always stay zero.
+       unsigned fractional_samples = 0;
+
+       std::mutex card_mutex;
        bool has_bmusb_thread = false;
        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).
@@ -345,15 +358,17 @@ private:
 
                QueueLengthPolicy queue_length_policy;  // Refers to the "new_frames" queue.
 
-               // Accumulated errors in number of 1/TIMEBASE samples. If OUTPUT_FREQUENCY divided by
-               // frame rate is integer, will always stay zero.
-               unsigned fractional_samples = 0;
-
                int last_timecode = -1;  // Unwrapped.
        };
-       CaptureCard cards[MAX_VIDEO_CARDS];  // protected by <bmusb_mutex>
+       CaptureCard cards[MAX_VIDEO_CARDS];  // Protected by <card_mutex>.
        AudioMixer audio_mixer;  // Same as global_audio_mixer (see audio_mixer.h).
-       void get_one_frame_from_each_card(unsigned master_card_index, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS], int num_samples[MAX_VIDEO_CARDS]);
+       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, bool master_card_is_output, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS]);
 
        InputState input_state;