#ifndef _HTTPD_H
#define _HTTPD_H
-// A class dealing with stream output, both to HTTP (thus the class name)
-// and to local output files. Since we generally have very few outputs
-// (end clients are not meant to connect directly to our stream; it should be
-// transcoded by something else and then sent to a reflector), we don't need to
-// care a lot about performance. Thus, we solve this by the simplest possible
-// way, namely having one ffmpeg mux per output.
+// A class dealing with stream output to HTTP.
#include <microhttpd.h>
#include <stddef.h>
struct MHD_Connection;
-extern "C" {
-#include <libavcodec/avcodec.h>
-#include <libavformat/avformat.h>
-#include <libavformat/avio.h>
-}
-
class HTTPD {
public:
- enum PacketDestination {
- DESTINATION_FILE_ONLY,
- DESTINATION_HTTP_ONLY,
- DESTINATION_FILE_AND_HTTP
- };
+ HTTPD();
- HTTPD(int width, int height);
- void start(int port);
- void add_packet(const AVPacket &pkt, int64_t pts, int64_t dts, PacketDestination destination);
+ // Should be called before start().
+ void set_header(const std::string &data) {
+ header = data;
+ }
- // You can only have one going at the same time.
- void open_output_file(const std::string &filename);
- void close_output_file();
+ void start(int port);
+ void add_data(const char *buf, size_t size, bool keyframe);
private:
static int answer_to_connection_thunk(void *cls, MHD_Connection *connection,
void request_completed(struct MHD_Connection *connection, void **con_cls, enum MHD_RequestTerminationCode toe);
- class Mux {
- public:
- enum Codec {
- CODEC_H264,
- CODEC_NV12, // Uncompressed 4:2:0.
- };
-
- Mux(AVFormatContext *avctx, int width, int height, Codec video_codec, int time_base); // Takes ownership of avctx.
- ~Mux();
- void add_packet(const AVPacket &pkt, int64_t pts, int64_t dts);
-
- private:
- bool seen_keyframe = false;
- AVFormatContext *avctx;
- AVStream *avstream_video, *avstream_audio;
- };
class Stream {
public:
- Stream(AVOutputFormat *oformat, int width, int height, int time_base);
+ enum Framing {
+ FRAMING_RAW,
+ FRAMING_METACUBE
+ };
+ Stream(Framing framing) : framing(framing) {}
static ssize_t reader_callback_thunk(void *cls, uint64_t pos, char *buf, size_t max);
ssize_t reader_callback(uint64_t pos, char *buf, size_t max);
- void add_packet(const AVPacket &pkt, int64_t pts, int64_t dts);
+ enum DataType {
+ DATA_TYPE_HEADER,
+ DATA_TYPE_KEYFRAME,
+ DATA_TYPE_OTHER
+ };
+ void add_data(const char *buf, size_t size, DataType data_type);
private:
- static int write_packet_thunk(void *opaque, uint8_t *buf, int buf_size);
- int write_packet(uint8_t *buf, int buf_size);
+ Framing framing;
std::mutex buffer_mutex;
std::condition_variable has_buffered_data;
std::deque<std::string> buffered_data; // Protected by <mutex>.
size_t used_of_buffered_data = 0; // How many bytes of the first element of <buffered_data> that is already used. Protected by <mutex>.
-
- std::unique_ptr<Mux> mux; // Must come last to be destroyed before buffered_data, since the destructor can write bytes.
+ size_t seen_keyframe = false;
};
std::mutex streams_mutex;
std::set<Stream *> streams; // Not owned.
-
- int width, height;
- std::unique_ptr<Mux> file_mux; // To local disk.
+ std::string header;
};
#endif // !defined(_HTTPD_H)