X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=mixer.h;h=f50eb58db5560f620b2fcdb1cc9097f4b6c5d1cb;hb=65d716be70e6295628dfa5bb0a72f3429b9696ba;hp=c6366fdec1a65d5e8f7e909ed788e0c6119d8c73;hpb=8cbf100e6126c1550a6436970d777a652ac1182e;p=nageru

diff --git a/mixer.h b/mixer.h
index c6366fd..f50eb58 100644
--- a/mixer.h
+++ b/mixer.h
@@ -5,18 +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;
@@ -27,7 +54,7 @@ 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();
@@ -38,11 +65,8 @@ public:
 	enum Output {
 		OUTPUT_LIVE = 0,
 		OUTPUT_PREVIEW,
-		OUTPUT_INPUT0,
-		OUTPUT_INPUT1,
-		OUTPUT_INPUT2,
-		OUTPUT_INPUT3,
-		NUM_OUTPUTS
+		OUTPUT_INPUT0,  // 1, 2, 3, up to 15 follow numerically.
+		NUM_OUTPUTS = 18
 	};
 
 	struct DisplayFrame {
@@ -77,14 +101,108 @@ public:
 		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 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 set_gain_staging_db(float gain_db)
+	{
+		std::unique_lock<std::mutex> lock(level_compressor_mutex);
+		level_compressor_enabled = false;
+		gain_staging_db = gain_db;
+	}
+
+	void set_gain_staging_auto(bool enabled)
+	{
+		std::unique_lock<std::mutex> lock(level_compressor_mutex);
+		level_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;
@@ -96,7 +214,7 @@ private:
 	// Effects part of <display_chain>. Owned by <display_chain>.
 	movit::FlatInput *display_input;
 
-	int frame = 0;
+	int64_t pts_int = 0;  // In TIMEBASE units.
 
 	std::mutex bmusb_mutex;
 	struct CaptureCard {
@@ -108,13 +226,27 @@ private:
 		QOpenGLContext *context;
 
 		bool new_data_ready = false;  // Whether new_frame contains anything.
+		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>
 
-	RefCountedFrame bmusb_current_rendering_frame[NUM_CARDS];
+	InputState input_state;
 
 	class OutputChannel {
 	public:
@@ -136,7 +268,44 @@ private:
 	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 compressor_mutex;
+	Ebu_r128_proc r128;  // Under compressor_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.
+	std::mutex level_compressor_mutex;
+	StereoCompressor level_compressor;  // Under compressor_mutex. Used to set/override gain_staging_db if <level_compressor_enabled>.
+	float gain_staging_db = 0.0f;  // Under compressor_mutex.
+	bool level_compressor_enabled = true;  // Under compressor_mutex.
+
+	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;