20 #ifndef AVFORMAT_AVIO_H 21 #define AVFORMAT_AVIO_H 38 #define AVIO_SEEKABLE_NORMAL 0x0001 51 typedef struct AVIOInterruptCB { 52 int (*callback)(
void*);
149 int64_t timestamp,
int flags);
212 int64_t (*
seek)(
void *opaque, int64_t offset,
int whence));
266 #define AVSEEK_SIZE 0x10000 274 #define AVSEEK_FORCE 0x20000 368 #define AVIO_FLAG_READ 1 369 #define AVIO_FLAG_WRITE 2 370 #define AVIO_FLAG_READ_WRITE (AVIO_FLAG_READ|AVIO_FLAG_WRITE) 387 #define AVIO_FLAG_NONBLOCK 8 513 int64_t timestamp,
int flags);
int avio_open(AVIOContext **s, const char *url, int flags)
Create and initialize a AVIOContext for accessing the resource indicated by url.
void avio_wb64(AVIOContext *s, uint64_t val)
void avio_wl16(AVIOContext *s, unsigned int val)
int64_t avio_size(AVIOContext *s)
Get the filesize.
int avio_put_str16be(AVIOContext *s, const char *str)
Convert an UTF-8 string to UTF-16BE and write it.
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
unsigned char * buf_ptr
Current position in the buffer.
unsigned char * buf_end
End of the data, may be less than buffer+buffer_size if the read function returned less data than req...
int write_flag
true if open for writing
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
unsigned char * buffer
Start of the buffer.
void * opaque
A private pointer, passed to the read/write/seek/...
unsigned int avio_rb16(AVIOContext *s)
int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a UTF-16 string from pb and convert it to UTF-8.
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Trailer data, which doesn't contain actual content, but only for finalizing the output file...
void avio_wl32(AVIOContext *s, unsigned int val)
unsigned int avio_rb32(AVIOContext *s)
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
const AVClass * av_class
A class for private options.
A point in the output bytestream where a demuxer can start parsing (for non self synchronizing bytest...
uint64_t avio_rb64(AVIOContext *s)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
int avio_check(const char *url, int flags)
Return AVIO_FLAG_* access flags corresponding to the access permissions of the resource in url...
void avio_wl64(AVIOContext *s, uint64_t val)
const OptionDef options[]
Callback for checking whether to abort blocking functions.
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
unsigned int avio_rl32(AVIOContext *s)
const char * avio_enum_protocols(void **opaque, int output)
Iterate through names of available protocols.
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
#define av_printf_format(fmtpos, attrpos)
int avio_r8(AVIOContext *s)
This is any, unlabelled data.
int(* read_packet)(void *opaque, uint8_t *buf, int buf_size)
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
int void avio_flush(AVIOContext *s)
unsigned int avio_rb24(AVIOContext *s)
const AVIOInterruptCB int_cb
unsigned char * checksum_ptr
AVIODataMarkerType
Different data types that can be returned via the AVIO write_data_type callback.
void avio_wb24(AVIOContext *s, unsigned int val)
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
int64_t(* seek)(void *opaque, int64_t offset, int whence)
int must_flush
true if the next seek should flush
int buffer_size
Maximum buffer size.
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
void avio_w8(AVIOContext *s, int b)
int(* write_packet)(void *opaque, uint8_t *buf, int buf_size)
Describe the class of an AVClass context structure.
int avio_put_str16le(AVIOContext *s, const char *str)
Convert an UTF-8 string to UTF-16LE and write it.
int avio_open2(AVIOContext **s, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create and initialize a AVIOContext for accessing the resource indicated by url.
int ignore_boundary_point
If set, don't call write_data_type separately for AVIO_DATA_MARKER_BOUNDARY_POINT, but ignore them and treat them as AVIO_DATA_MARKER_UNKNOWN (to avoid needlessly small chunks of data returned from the callback).
int error
contains the error code or 0 if no error happened
void avio_wl24(AVIOContext *s, unsigned int val)
int avio_pause(AVIOContext *h, int pause)
Pause and resume playing - only meaningful if using a network streaming protocol (e.g.
void avio_wb16(AVIOContext *s, unsigned int val)
enum AVIODataMarkerType current_type
Internal, not meant to be used from outside of AVIOContext.
int(* read_pause)(void *opaque, int pause)
Pause or resume playback for network streaming protocols - e.g.
unsigned int avio_rl16(AVIOContext *s)
common internal and external API header
int(* write_data_type)(void *opaque, uint8_t *buf, int buf_size, enum AVIODataMarkerType type, int64_t time)
A callback that is used instead of write_packet.
int avio_get_str16be(AVIOContext *pb, int maxlen, char *buf, int buflen)
unsigned long(* update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size)
int64_t pos
position in the file of the current buffer
int64_t avio_seek_time(AVIOContext *h, int stream_index, int64_t timestamp, int flags)
Seek to a given timestamp relative to some component stream.
A point in the output bytestream where a decoder can start decoding (i.e.
int eof_reached
true if eof reached
void avio_wb32(AVIOContext *s, unsigned int val)
int avio_get_str(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a string from pb into buf.
unsigned int avio_rl24(AVIOContext *s)
int avio_closep(AVIOContext **s)
Close the resource accessed by the AVIOContext *s, free it and set the pointer pointing to it to NULL...
uint64_t avio_rl64(AVIOContext *s)
int64_t(* read_seek)(void *opaque, int stream_index, int64_t timestamp, int flags)
Seek to a given timestamp in stream with the specified stream_index.
Header data; this needs to be present for the stream to be decodeable.
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2