public:
enum Codec {
CODEC_H264,
- CODEC_NV12, // Uncompressed 4:2:0.
+ CODEC_AV1,
CODEC_MJPEG
};
- enum WithAudio {
- WITH_AUDIO,
- WITHOUT_AUDIO
- };
enum WriteStrategy {
// add_packet() will write the packet immediately, unless plugged.
WRITE_FOREGROUND,
// higher overhead.
WRITE_BACKGROUND,
};
+ enum WithSubtitles {
+ WITH_SUBTITLES,
+ WITHOUT_SUBTITLES
+ };
// 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.)
// Does not take ownership of <metrics>; elements in there, if any,
// will be added to.
- Mux(AVFormatContext *avctx, int width, int height, Codec video_codec, const std::string &video_extradata, const AVCodecParameters *audio_codecpar, AVColorSpace color_space, WithAudio with_audio, int time_base, std::function<void(int64_t)> write_callback, WriteStrategy write_strategy, const std::vector<MuxMetrics *> &metrics);
+ //
+ // If audio_codecpar is nullptr, there will be no audio stream.
+ Mux(AVFormatContext *avctx, int width, int height, Codec video_codec, const std::string &video_extradata, const AVCodecParameters *audio_codecpar, AVColorSpace color_space, int time_base, std::function<void(int64_t)> write_callback, WriteStrategy write_strategy, const std::vector<MuxMetrics *> &metrics, WithSubtitles with_subtitles = WITHOUT_SUBTITLES);
~Mux();
void add_packet(const AVPacket &pkt, int64_t pts, int64_t dts, AVRational timebase = { 1, TIMEBASE }, int stream_index_override = -1);
+ int get_subtitle_stream_idx() const { return subtitle_stream_idx; }
// 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
void plug();
void unplug();
+ // Temporary stop the mux; any packets coming in are discarded, and any existing ones
+ // in the queue will be dropped. Any writes in progress will finish as usual.
+ // Incompatible with plug().
+ void drain();
+ void undrain();
+
private:
// If write_strategy == WRITE_FOREGORUND, Must be called with <mu> held.
void write_packet_or_die(const AVPacket &pkt, int64_t unscaled_pts);
void thread_func();
+ void write_header();
WriteStrategy write_strategy;
AVFormatContext *avctx; // Protected by <mu>, iff write_strategy == WRITE_BACKGROUND.
int plug_count = 0; // Protected by <mu>.
+ bool drained = false; // Protected by <mu>.
// Protected by <mu>. If write_strategy == WRITE_FOREGROUND,
// this is only in use when plugging.
std::vector<QueuedPacket> packet_queue;
std::condition_variable packet_queue_ready;
- AVStream *avstream_video, *avstream_audio;
+ std::vector<AVStream *> streams;
+ int subtitle_stream_idx = -1;
std::function<void(int64_t)> write_callback;
std::vector<MuxMetrics *> metrics;