4 // Wrapper around an AVFormat mux.
7 #include <libavcodec/avcodec.h>
8 #include <libavformat/avformat.h>
9 #include <libavformat/avio.h>
15 class KeyFrameSignalReceiver {
17 // Needs to automatically turn the flag off again after actually receiving data.
18 virtual void signal_keyframe() = 0;
25 CODEC_NV12, // Uncompressed 4:2:0.
28 // Takes ownership of avctx. <keyframe_signal_receiver> can be nullptr.
29 Mux(AVFormatContext *avctx, int width, int height, Codec video_codec, const std::string &video_extradata, const AVCodecContext *audio_ctx, int time_base, KeyFrameSignalReceiver *keyframe_signal_receiver);
31 void add_packet(const AVPacket &pkt, int64_t pts, int64_t dts);
33 // As long as the mux is plugged, it will not actually write anything to disk,
34 // just queue the packets. Once it is unplugged, the packets are reordered by pts
35 // and written. This is primarily useful if you might have two different encoders
36 // writing to the mux at the same time (because one is shutting down), so that
37 // pts might otherwise come out-of-order.
39 // You can plug and unplug multiple times; only when the plug count reaches zero,
40 // something will actually happen.
46 AVFormatContext *avctx; // Protected by <mu>.
47 int plug_count = 0; // Protected by <mu>.
48 std::vector<AVPacket *> plugged_packets; // Protected by <mu>.
50 AVStream *avstream_video, *avstream_audio;
51 KeyFrameSignalReceiver *keyframe_signal_receiver;
54 #endif // !defined(_MUX_H)