X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=mixer.h;h=db6db15155bacb85fd0fe011296cf770422039f5;hb=2f140fea66b8c5351eec2a818971084a58626003;hp=ff029a976459958a325dd2e35e9d28a8464fdabc;hpb=ed7f13b71fdce57d6ab0111acd1f1f64fb7e866d;p=nageru

diff --git a/mixer.h b/mixer.h
index ff029a9..db6db15 100644
--- a/mixer.h
+++ b/mixer.h
@@ -5,15 +5,45 @@
 
 #include <epoxy/gl.h>
 #undef Success
+#include <stdbool.h>
+#include <stdint.h>
+
 #include <movit/effect_chain.h>
+#include <movit/flat_input.h>
+#include <zita-resampler/resampler.h>
+#include <atomic>
+#include <condition_variable>
+#include <cstddef>
 #include <functional>
+#include <memory>
+#include <mutex>
+#include <string>
+#include <thread>
+#include <vector>
 
-#include "bmusb.h"
+#include "bmusb/bmusb.h"
+#include "alsa_output.h"
+#include "ebu_r128_proc.h"
 #include "h264encode.h"
+#include "httpd.h"
 #include "pbo_frame_allocator.h"
+#include "ref_counted_frame.h"
 #include "ref_counted_gl_sync.h"
+#include "resampling_queue.h"
+#include "theme.h"
+#include "timebase.h"
+#include "stereocompressor.h"
+#include "filter.h"
+#include "input_state.h"
 
-#define NUM_CARDS 2
+class H264Encoder;
+class QSurface;
+namespace movit {
+class Effect;
+class EffectChain;
+class FlatInput;
+class ResourcePool;
+}  // namespace movit
 
 namespace movit {
 class YCbCrInput;
@@ -24,78 +54,243 @@ class QSurfaceFormat;
 class Mixer {
 public:
 	// The surface format is used for offscreen destinations for OpenGL contexts we need.
-	Mixer(const QSurfaceFormat &format);
+	Mixer(const QSurfaceFormat &format, unsigned num_cards);
 	~Mixer();
 	void start();
 	void quit();
 
-	enum Source {
-		SOURCE_INPUT1,
-		SOURCE_INPUT2,
-		SOURCE_SBS,
+	void transition_clicked(int transition_num);
+	void channel_clicked(int preview_num);
+
+	enum Output {
+		OUTPUT_LIVE = 0,
+		OUTPUT_PREVIEW,
+		OUTPUT_INPUT0,  // 1, 2, 3, up to 15 follow numerically.
+		NUM_OUTPUTS = 18
 	};
-	void cut(Source source);
 
 	struct DisplayFrame {
-		GLuint texnum;
-		RefCountedGLsync ready_fence;  // Asserted when the texture is done rendering.
+		// The chain for rendering this frame. To render a display frame,
+		// first wait for <ready_fence>, then call <setup_chain>
+		// to wire up all the inputs, and then finally call
+		// chain->render_to_screen() or similar.
+		movit::EffectChain *chain;
+		std::function<void()> setup_chain;
+
+		// Asserted when all the inputs are ready; you cannot render the chain
+		// before this.
+		RefCountedGLsync ready_fence;
+
+		// Holds on to all the input frames needed for this display frame,
+		// so they are not released while still rendering.
+		std::vector<RefCountedFrame> input_frames;
+
+		// Textures that should be released back to the resource pool
+		// when this frame disappears, if any.
+		// TODO: Refcount these as well?
+		std::vector<GLuint> temp_textures;
 	};
 	// Implicitly frees the previous one if there's a new frame available.
-	bool get_display_frame(DisplayFrame *frame);
+	bool get_display_frame(Output output, DisplayFrame *frame) {
+		return output_channel[output].get_display_frame(frame);
+	}
 
 	typedef std::function<void()> new_frame_ready_callback_t;
-	void set_frame_ready_fallback(new_frame_ready_callback_t callback);
+	void set_frame_ready_callback(Output output, new_frame_ready_callback_t callback)
+	{
+		output_channel[output].set_frame_ready_callback(callback);
+	}
+
+	typedef std::function<void(float level_lufs, float peak_db,
+	                           float global_level_lufs, float range_low_lufs, float range_high_lufs,
+	                           float auto_gain_staging_db)> audio_level_callback_t;
+	void set_audio_level_callback(audio_level_callback_t callback)
+	{
+		audio_level_callback = callback;
+	}
+
+	std::vector<std::string> get_transition_names()
+	{
+		return theme->get_transition_names(pts());
+	}
+
+	unsigned get_num_channels() const
+	{
+		return theme->get_num_channels();
+	}
+
+	std::string get_channel_name(unsigned channel) const
+	{
+		return theme->get_channel_name(channel);
+	}
+
+	bool get_supports_set_wb(unsigned channel) const
+	{
+		return theme->get_supports_set_wb(channel);
+	}
+
+	void set_wb(unsigned channel, double r, double g, double b) const
+	{
+		theme->set_wb(channel, r, g, b);
+	}
+
+	void set_locut_cutoff(float cutoff_hz)
+	{
+		locut_cutoff_hz = cutoff_hz;
+	}
+
+	float get_limiter_threshold_dbfs()
+	{
+		return limiter_threshold_dbfs;
+	}
+
+	float get_compressor_threshold_dbfs()
+	{
+		return compressor_threshold_dbfs;
+	}
+
+	void set_limiter_threshold_dbfs(float threshold_dbfs)
+	{
+		limiter_threshold_dbfs = threshold_dbfs;
+	}
+
+	void set_compressor_threshold_dbfs(float threshold_dbfs)
+	{
+		compressor_threshold_dbfs = threshold_dbfs;
+	}
+
+	void set_limiter_enabled(bool enabled)
+	{
+		limiter_enabled = enabled;
+	}
+
+	void set_compressor_enabled(bool enabled)
+	{
+		compressor_enabled = enabled;
+	}
+
+	void schedule_cut()
+	{
+		should_cut = true;
+	}
+
+	void reset_meters();
 
 private:
-	void bm_frame(int card_index, uint16_t timecode,
+	void bm_frame(unsigned card_index, uint16_t timecode,
 		FrameAllocator::Frame video_frame, size_t video_offset, uint16_t video_format,
 		FrameAllocator::Frame audio_frame, size_t audio_offset, uint16_t audio_format);
 	void place_rectangle(movit::Effect *resample_effect, movit::Effect *padding_effect, float x0, float y0, float x1, float y1);
 	void thread_func();
+	void audio_thread_func();
+	void process_audio_one_frame(int64_t frame_pts_int, int num_samples);
 	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;
 	std::unique_ptr<movit::ResourcePool> resource_pool;
-	std::unique_ptr<movit::EffectChain> chain;
+	std::unique_ptr<Theme> theme;
+	std::unique_ptr<movit::EffectChain> display_chain;
 	GLuint cbcr_program_num;  // Owned by <resource_pool>.
 	std::unique_ptr<H264Encoder> h264_encoder;
 
-	// Effects part of <chain>. Owned by <chain>.
-	movit::YCbCrInput *input[NUM_CARDS];
-	movit::Effect *resample_effect, *resample2_effect;
-	movit::Effect *padding_effect, *padding2_effect;
+	// Effects part of <display_chain>. Owned by <display_chain>.
+	movit::FlatInput *display_input;
 
-	Source current_source = SOURCE_INPUT1;
-	int frame = 0;
-
-	std::mutex display_frame_mutex;
-	DisplayFrame current_display_frame, ready_display_frame;  // protected by <frame_mutex>
-	bool has_current_display_frame = false, has_ready_display_frame = false;  // protected by <frame_mutex>
+	int64_t pts_int = 0;  // In TIMEBASE units.
 
 	std::mutex bmusb_mutex;
 	struct CaptureCard {
 		BMUSBCapture *usb;
 		std::unique_ptr<PBOFrameAllocator> frame_allocator;
 
-		// Threading stuff
-		bool thread_initialized = false;
+		// Stuff for the OpenGL context (for texture uploading).
 		QSurface *surface;
 		QOpenGLContext *context;
 
 		bool new_data_ready = false;  // Whether new_frame contains anything.
-		FrameAllocator::Frame new_frame;
+		bool should_quit = false;
+		RefCountedFrame new_frame;
+		int64_t new_frame_length;  // In TIMEBASE units.
+		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.
+
+		// 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;
+
+		std::mutex audio_mutex;
+		std::unique_ptr<ResamplingQueue> resampling_queue;  // Under audio_mutex.
+		int last_timecode = -1;  // Unwrapped.
+		int64_t next_local_pts = 0;  // Beginning of next frame, in TIMEBASE units.
 	};
-	CaptureCard cards[NUM_CARDS];  // protected by <bmusb_mutex>
+	CaptureCard cards[MAX_CARDS];  // protected by <bmusb_mutex>
+
+	InputState input_state;
 
-	FrameAllocator::Frame bmusb_current_rendering_frame[NUM_CARDS];
+	class OutputChannel {
+	public:
+		~OutputChannel();
+		void output_frame(DisplayFrame frame);
+		bool get_display_frame(DisplayFrame *frame);
+		void set_frame_ready_callback(new_frame_ready_callback_t callback);
 
-	new_frame_ready_callback_t new_frame_ready_callback;
-	bool has_new_frame_ready_callback = false;
+	private:
+		friend class Mixer;
+
+		Mixer *parent = nullptr;  // Not owned.
+		std::mutex frame_mutex;
+		DisplayFrame current_frame, ready_frame;  // protected by <frame_mutex>
+		bool has_current_frame = false, has_ready_frame = false;  // protected by <frame_mutex>
+		new_frame_ready_callback_t new_frame_ready_callback;
+		bool has_new_frame_ready_callback = false;
+	};
+	OutputChannel output_channel[NUM_OUTPUTS];
 
 	std::thread mixer_thread;
-	bool should_quit = false;
+	std::thread audio_thread;
+	std::atomic<bool> should_quit{false};
+	std::atomic<bool> should_cut{false};
+
+	audio_level_callback_t audio_level_callback = nullptr;
+	std::mutex r128_mutex;
+	Ebu_r128_proc r128;  // Under r128_mutex.
+
+	Resampler peak_resampler;
+	std::atomic<float> peak{0.0f};
+
+	StereoFilter locut;  // Default cutoff 150 Hz, 24 dB/oct.
+	std::atomic<float> locut_cutoff_hz;
+
+	// First compressor; takes us up to about -12 dBFS.
+	StereoCompressor level_compressor;
+	float last_gain_staging_db = 0.0f;
+
+	static constexpr float ref_level_dbfs = -14.0f;
+
+	StereoCompressor limiter;
+	std::atomic<float> limiter_threshold_dbfs{ref_level_dbfs + 4.0f};   // 4 dB.
+	std::atomic<bool> limiter_enabled{true};
+	StereoCompressor compressor;
+	std::atomic<float> compressor_threshold_dbfs{ref_level_dbfs - 12.0f};  // -12 dB.
+	std::atomic<bool> compressor_enabled{true};
+
+	std::unique_ptr<ALSAOutput> alsa;
+
+	struct AudioTask {
+		int64_t pts_int;
+		int num_samples;
+	};
+	std::mutex audio_mutex;
+	std::condition_variable audio_task_queue_changed;
+	std::queue<AudioTask> audio_task_queue;  // Under audio_mutex.
 };
 
 extern Mixer *global_mixer;