shithub: treason

ref: d696956ababd5fdec5bcb51373896468c310161d
dir: /stream.h/

typedef struct Stream Stream;
typedef struct Streamhdr Streamhdr;
typedef struct Streamframe Streamframe;
typedef struct Streaminfo Streaminfo;
typedef struct Streamops Streamops;
#pragma incomplete Stream

enum {
	Svideo,
	Saudio,
	Ssubtitles,

	/* video */
	FmtAV1 = 0,
	FmtH264,
	FmtVP8,
	FmtVP9,
	/* audio */
	FmtAAC,
	FmtMp3,
	FmtOpus,
	FmtVorbis,
	FmtFlac,
	/* subtitles */
	FmtSrt,

	Numfmt,
};

struct Streamframe {
	uvlong timestamp;
	uvlong dt;
	union {
		struct { /* video/audio */
			u8int *buf;
			int sz;
		};
		struct { /* subtitles */
			char *lines[16];
			int nlines;
		};
	};
};

struct Streamops {
	Stream *(*open)(char *path, int *num, int *failed);
	u8int *(*alloc)(void *aux, int sz);
	void (*close)(Stream *s);
	int (*read)(Stream *s, Streamframe *f);

	void *aux;
};

struct Streaminfo {
	int type;
	int fmt;

	struct {
		uvlong denum, num;
	}timebase;

	union {
		struct {
			int w, h;
		}video;

		struct {
			int nchan;
			int srate;
		}audio;
	};

	char info[128];
};

#define Zt₀ (~0ULL)

struct Stream {
	Streaminfo;
	Streamops ops;

	/* private stuff */
	uvlong timestamp;
	uvlong t₀;
	void *b;
	u8int *buf;
	int bufsz;
	void *aux;
	void (*freeaux)(void *);
};

Stream *Sopen(char *filename, int *num);
void Sclose(Stream *s);
int Sread(Stream *s, Streamframe *f);

int ivfopenb(void *bio, Stream *s, int *failed);
int audopenfd(int fd, Stream *s, int *failed);
int subopenfd(int fd, Stream *s, int *failed);

Stream *subopen(char *path, int *num, int *failed);