libavformat/avio_internal.h File Reference

#include "avio.h"
#include "url.h"

Go to the source code of this file.

Functions
int	ffio_init_context (AVIOContext *s, 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))
int	ffio_read_partial (AVIOContext *s, unsigned char *buf, int size)
	Read size bytes from AVIOContext into buf.
void	ffio_fill (AVIOContext *s, int b, int count)
static av_always_inline void	ffio_wfourcc (AVIOContext *pb, const uint8_t *s)
int	ffio_rewind_with_probe_data (AVIOContext *s, unsigned char *buf, int buf_size)
	Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file.
uint64_t	ffio_read_varlen (AVIOContext *bc)
int	ffio_set_buf_size (AVIOContext *s, int buf_size)
void	ffio_init_checksum (AVIOContext *s, unsigned long(*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum)
unsigned long	ffio_get_checksum (AVIOContext *s)
unsigned long	ff_crc04C11DB7_update (unsigned long checksum, const uint8_t *buf, unsigned int len)
int	ffio_open_dyn_packet_buf (AVIOContext **s, int max_packet_size)
	Open a write only packetized memory stream with a maximum packet size of 'max_packet_size'.
int	ffio_fdopen (AVIOContext **s, URLContext *h)
	Create and initialize a AVIOContext for accessing the resource referenced by the URLContext h.

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Function Documentation

unsigned long ff_crc04C11DB7_update	(	unsigned long	checksum,
		const uint8_t *	buf,
		unsigned int	len
	)

Definition at line 584 of file aviobuf.c.

Referenced by get_packetheader(), ogg_write_page(), put_packet(), and write_packet().

int ffio_fdopen	(	AVIOContext **	s,
		URLContext *	h
	)

Create and initialize a AVIOContext for accessing the resource referenced by the URLContext h.

Note:

When the URLContext h has been opened in read+write mode, the AVIOContext can be used only for writing.

Parameters:

s

Used to return the pointer to the created AVIOContext. In case of failure the pointed to value is set to NULL.

Returns:

0 in case of success, a negative value corresponding to an AVERROR code in case of failure

Definition at line 838 of file aviobuf.c.

Referenced by avio_open(), ff_rtp_chain_mux_open(), and url_fdopen().

void ffio_fill	(	AVIOContext *	s,
		int	b,
		int	count
	)

Definition at line 148 of file aviobuf.c.

Referenced by put_nbyte(), and spdif_write_packet().

unsigned long ffio_get_checksum

(

AVIOContext *

s

)

Definition at line 590 of file aviobuf.c.

Referenced by decode_info_header(), decode_main_header(), decode_stream_header(), decode_syncpoint(), find_and_decode_index(), get_checksum(), get_packetheader(), ogg_update_checksum(), put_packet(), and write_packet().

void ffio_init_checksum	(	AVIOContext *	s,
		unsigned long(*)(unsigned long c, const uint8_t *p, unsigned int len)	update_checksum,
		unsigned long	checksum
	)

Definition at line 597 of file aviobuf.c.

Referenced by get_packetheader(), init_checksum(), ogg_write_page(), put_packet(), and write_packet().

int ffio_init_context	(	AVIOContext *	s,
		unsigned char *	buffer,
		int	buffer_size,
		int	write_flag,
		void *	opaque,
		int(*)(void *opaque, uint8_t *buf, int buf_size)	read_packet,
		int(*)(void *opaque, uint8_t *buf, int buf_size)	write_packet,
		int64_t(*)(void *opaque, int64_t offset, int whence)	seek
	)

Definition at line 43 of file aviobuf.c.

Referenced by applehttp_read_header(), asf_write_header(), asfrtp_parse_packet(), avio_alloc_context(), ff_id3v2_parse(), ff_parse_mpeg2_descriptor(), ffio_fdopen(), flush_packet(), init_packetizer(), init_put_byte(), matroska_ebmlnum_uint(), matroska_read_header(), mms_put_utf16(), mov_read_cmov(), mp4_read_iods(), qt_rtp_parse_packet(), rdt_load_mdpr(), rdt_parse_packet(), sap_read_header(), and url_open_buf().

int ffio_open_dyn_packet_buf	(	AVIOContext **	s,
		int	max_packet_size
	)

Open a write only packetized memory stream with a maximum packet size of 'max_packet_size'.

The stream is stored in a memory buffer with a big endian 4 byte header giving the packet size in bytes.

Parameters:

	s	new IO context
	max_packet_size	maximum packet size (must be > 0)

Returns:

zero if no error.

Definition at line 1164 of file aviobuf.c.

Referenced by ff_mov_add_hinted_packet(), ff_rtp_chain_mux_open(), http_prepare_data(), rtp_new_av_stream(), tcp_write_packet(), and url_open_dyn_packet_buf().

int ffio_read_partial	(	AVIOContext *	s,
		unsigned char *	buf,
		int	size
	)

Read size bytes from AVIOContext into buf.

This reads at most 1 packet. If that is not enough fewer bytes will be returned.

Returns:

number of bytes read or AVERROR

Definition at line 676 of file aviobuf.c.

Referenced by ff_raw_read_partial_packet(), and get_partial_buffer().

uint64_t ffio_read_varlen

(

AVIOContext *

bc

)

Definition at line 827 of file aviobuf.c.

Referenced by decode_frame_header(), decode_info_header(), decode_main_header(), decode_stream_header(), decode_syncpoint(), find_and_decode_index(), get_fourcc(), get_packetheader(), get_s(), get_str(), mpc8_get_chunk_header(), mpc8_handle_chunk(), and mpc8_read_header().

int ffio_rewind_with_probe_data	(	AVIOContext *	s,
		unsigned char *	buf,
		int	buf_size
	)

Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file.

Used after probing to avoid seeking. Joins buf and s->buffer, taking any overlap into consideration.

Note:

s->buffer must overlap with buf or they can't be joined and the function fails

Parameters:

	s	The read-only AVIOContext to rewind
	buf	The probe buffer containing the first buf_size bytes of the file
	buf_size	The size of buf

Returns:

0 in case of success, a negative value corresponding to an AVERROR code in case of failure

Definition at line 907 of file aviobuf.c.

Referenced by av_probe_input_buffer().

int ffio_set_buf_size	(	AVIOContext *	s,
		int	buf_size
	)

Warning:

must be called before any I/O

Definition at line 878 of file aviobuf.c.

Referenced by fill_buffer(), and url_setbufsize().

static av_always_inline void ffio_wfourcc	(	AVIOContext *	pb,
		const uint8_t *	s
	)			[static]

Definition at line 46 of file avio_internal.h.

Referenced by aiff_write_header(), avi_start_new_riff(), avi_write_header(), avi_write_idx1(), avi_write_info_tag(), avi_write_ix(), avi_write_trailer(), caf_write_header(), mov_write_3gp_udta_tag(), mov_write_ac3_tag(), mov_write_amr_tag(), mov_write_avcc_tag(), mov_write_avid_tag(), mov_write_chpl_tag(), mov_write_ctts_tag(), mov_write_d263_tag(), mov_write_dinf_tag(), mov_write_dref_tag(), mov_write_edts_tag(), mov_write_enda_tag(), mov_write_esds_tag(), mov_write_ftyp_tag(), mov_write_glbl_tag(), mov_write_gmhd_tag(), mov_write_hdlr_tag(), mov_write_hmhd_tag(), mov_write_ilst_tag(), mov_write_itunes_hdlr_tag(), mov_write_mdat_tag(), mov_write_mdhd_tag(), mov_write_mdia_tag(), mov_write_meta_tag(), mov_write_minf_tag(), mov_write_moov_tag(), mov_write_mvhd_tag(), mov_write_nmhd_tag(), mov_write_pasp_tag(), mov_write_rtp_tag(), mov_write_smhd_tag(), mov_write_stbl_tag(), mov_write_stco_tag(), mov_write_string_data_tag(), mov_write_string_tag(), mov_write_stsc_tag(), mov_write_stsd_tag(), mov_write_stss_tag(), mov_write_stsz_tag(), mov_write_stts_tag(), mov_write_svq3_tag(), mov_write_tapt_tag(), mov_write_tkhd_tag(), mov_write_trailer(), mov_write_trak_tag(), mov_write_tref_tag(), mov_write_trkn_tag(), mov_write_udta_sdp(), mov_write_udta_tag(), mov_write_uuid_tag_ipod(), mov_write_uuid_tag_psp(), mov_write_uuidprof_tag(), mov_write_uuidusmt_tag(), mov_write_video_tag(), mov_write_vmhd_tag(), mov_write_wave_tag(), ogg_write_page(), rv10_write_header(), and sox_write_header().