Export SRT statistics as Prometheus metrics.

[nageru] / nageru / ffmpeg_capture.h

diff --git a/nageru/ffmpeg_capture.h b/nageru/ffmpeg_capture.h
index 6084b68f398dd6a15727fc380c3ef1207a818db6..4cddbfddf757bce77a1f49b6c21b52bd7b57675b 100644 (file)
--- a/nageru/ffmpeg_capture.h
+++ b/nageru/ffmpeg_capture.h
@@ -57,6 +57,10 @@ class FFmpegCapture : public bmusb::CaptureInterface
 {
 public:
        FFmpegCapture(const std::string &filename, unsigned width, unsigned height);
+#ifdef HAVE_SRT
+       // Takes ownership of the SRT client socket.
+       FFmpegCapture(int srt_sock, const std::string &stream_id);
+#endif
        ~FFmpegCapture();
 
        void set_card_index(int card_index)
@@ -195,6 +199,11 @@ public:
                has_dequeue_callbacks = true;
        }
 
+       void set_card_disconnected_callback(bmusb::card_disconnected_callback_t callback)
+       {
+               card_disconnected_callback = callback;
+       }
+
        std::string get_description() const override
        {
                return description;
@@ -203,7 +212,8 @@ public:
        void configure_card() override;
        void start_bm_capture() override;
        void stop_dequeue_thread() override;
-       bool get_disconnected() const override { return false; }  // We never unplug.
+       bool get_disconnected() const override { return disconnected; }  // Only if play_once == true.
+       int get_srt_sock() const { return srt_sock; }
 
        std::map<uint32_t, bmusb::VideoMode> get_available_video_modes() const override;
        void set_video_mode(uint32_t video_mode_id) override {}  // Ignore.
@@ -249,13 +259,22 @@ private:
        bmusb::VideoFormat construct_video_format(const AVFrame *frame, AVRational video_timebase);
        UniqueFrame make_video_frame(const AVFrame *frame, const std::string &pathname, bool *error);
 
-       static int interrupt_cb_thunk(void *unique);
+       static int interrupt_cb_thunk(void *opaque);
        int interrupt_cb();
 
+#ifdef HAVE_SRT
+       static int read_srt_thunk(void *opaque, uint8_t *buf, int buf_size);
+       int read_srt(uint8_t *buf, int buf_size);
+#endif
+
+       inline unsigned frame_width(const AVFrame *frame) const;
+       inline unsigned frame_height(const AVFrame *frame) const;
+
        mutable std::mutex filename_mu;
        std::string description, filename;
+       int srt_sock = -1;
        uint16_t timecode = 0;
-       unsigned width, height;
+       unsigned width, height;  // 0 means keep input size.
        bmusb::PixelFormat pixel_format = bmusb::PixelFormat_8BitBGRA;
        movit::YCbCrFormat current_frame_ycbcr_format;
        bool running = false;
@@ -269,6 +288,10 @@ private:
        std::function<void()> dequeue_init_callback = nullptr;
        std::function<void()> dequeue_cleanup_callback = nullptr;
 
+       bmusb::card_disconnected_callback_t card_disconnected_callback = nullptr;
+       bool play_once = false;  // End thread after playing. Only for SRT, since the socket is ephemeral.
+       std::atomic<bool> disconnected{false};
+
        bmusb::FrameAllocator *video_frame_allocator = nullptr;
        bmusb::FrameAllocator *audio_frame_allocator = nullptr;
        std::unique_ptr<bmusb::FrameAllocator> owned_video_frame_allocator;
@@ -305,7 +328,7 @@ private:
        bool has_last_subtitle = false;
        std::string last_subtitle;
 
-       movit::RGBTriplet last_neutral_color;
+       movit::RGBTriplet last_neutral_color{1.0f, 1.0f, 1.0f};
 };
 
 #endif  // !defined(_FFMPEG_CAPTURE_H)