X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=mux.h;h=3f5007db9f75c6040415be1a01ce6ccd74059db0;hb=afe996bc7dfc8689ca356d00824fbfcd632f93a2;hp=1dd967c40f2e7f3d379c168cf4485d10f18c2def;hpb=e1a58f0f4e9cd05441f1e1b43fc4c83d1f862dd7;p=nageru

diff --git a/mux.h b/mux.h
index 1dd967c..3f5007d 100644
--- a/mux.h
+++ b/mux.h
@@ -9,13 +9,10 @@ extern "C" {
 #include <libavformat/avio.h>
 }
 
+#include <functional>
 #include <mutex>
-
-class KeyFrameSignalReceiver {
-public:
-	// Needs to automatically turn the flag off again after actually receiving data.
-	virtual void signal_keyframe() = 0;
-};
+#include <queue>
+#include <vector>
 
 class Mux {
 public:
@@ -24,16 +21,35 @@ public:
 		CODEC_NV12,  // Uncompressed 4:2:0.
 	};
 
-	// Takes ownership of avctx. <keyframe_signal_receiver> can be nullptr.
-	Mux(AVFormatContext *avctx, int width, int height, Codec video_codec, const AVCodecContext *audio_ctx, int time_base, KeyFrameSignalReceiver *keyframe_signal_receiver);
+	// Takes ownership of avctx. <write_callback> will be called every time
+	// a write has been made to the video stream (id 0), with the pts of
+	// the just-written frame. (write_callback can be nullptr.)
+	Mux(AVFormatContext *avctx, int width, int height, Codec video_codec, const std::string &video_extradata, const AVCodecParameters *audio_codecpar, int time_base, std::function<void(int64_t)> write_callback);
 	~Mux();
 	void add_packet(const AVPacket &pkt, int64_t pts, int64_t dts);
 
+	// As long as the mux is plugged, it will not actually write anything to disk,
+	// just queue the packets. Once it is unplugged, the packets are reordered by pts
+	// and written. This is primarily useful if you might have two different encoders
+	// writing to the mux at the same time (because one is shutting down), so that
+	// pts might otherwise come out-of-order.
+	//
+	// You can plug and unplug multiple times; only when the plug count reaches zero,
+	// something will actually happen.
+	void plug();
+	void unplug();
+
 private:
-	std::mutex ctx_mu;
-	AVFormatContext *avctx;  // Protected by <ctx_mu>.
+	void write_packet_or_die(const AVPacket &pkt);  // Must be called with <mu> held.
+
+	std::mutex mu;
+	AVFormatContext *avctx;  // Protected by <mu>.
+	int plug_count = 0;  // Protected by <mu>.
+	std::vector<AVPacket *> plugged_packets;  // Protected by <mu>.
+
 	AVStream *avstream_video, *avstream_audio;
-	KeyFrameSignalReceiver *keyframe_signal_receiver;
+
+	std::function<void(int64_t)> write_callback;
 };
 
 #endif  // !defined(_MUX_H)