FFmpeg
Functions
vvc.h File Reference
#include <stdint.h>
#include "avio.h"

Go to the source code of this file.

Functions

int ff_vvc_annexb2mp4 (AVIOContext *pb, const uint8_t *buf_in, int size, int filter_ps, int *ps_count)
 Writes Annex B formatted H.266/VVC NAL units to the provided AVIOContext. More...
 
int ff_vvc_annexb2mp4_buf (const uint8_t *buf_in, uint8_t **buf_out, int *size, int filter_ps, int *ps_count)
 Writes Annex B formatted H.266/VVC NAL units to a data buffer. More...
 
int ff_isom_write_vvcc (AVIOContext *pb, const uint8_t *data, int size, int ps_array_completeness)
 Writes H.266/VVC extradata (parameter sets, declarative SEI NAL units) to the provided AVIOContext. More...
 

Detailed Description

internal header for H.266/VVC (de)muxer utilities

Definition in file vvc.h.

Function Documentation

◆ ff_vvc_annexb2mp4()

int ff_vvc_annexb2mp4 ( AVIOContext pb,
const uint8_t *  buf_in,
int  size,
int  filter_ps,
int ps_count 
)

Writes Annex B formatted H.266/VVC NAL units to the provided AVIOContext.

The NAL units are converted to an MP4-compatible format (start code prefixes are replaced by 4-byte size fields, as per ISO/IEC 14496-15).

If filter_ps is non-zero, any VVC parameter sets found in the input will be discarded, and *ps_count will be set to the number of discarded PS NAL units.

Parameters
pbaddress of the AVIOContext where the data shall be written
buf_inaddress of the buffer holding the input data
sizesize (in bytes) of the input buffer
filter_pswhether to write parameter set NAL units to the output (0) or to discard them (non-zero)
ps_countaddress of the variable where the number of discarded parameter set NAL units shall be written, may be NULL
Returns
the amount (in bytes) of data written in case of success, a negative value corresponding to an AVERROR code in case of failure

Definition at line 853 of file vvc.c.

Referenced by ff_mov_write_packet(), and ff_vvc_annexb2mp4_buf().

◆ ff_vvc_annexb2mp4_buf()

int ff_vvc_annexb2mp4_buf ( const uint8_t *  buf_in,
uint8_t **  buf_out,
int size,
int  filter_ps,
int ps_count 
)

Writes Annex B formatted H.266/VVC NAL units to a data buffer.

The NAL units are converted to an MP4-compatible format (start code prefixes are replaced by 4-byte size fields, as per ISO/IEC 14496-15).

If filter_ps is non-zero, any VVC parameter sets found in the input will be discarded, and *ps_count will be set to the number of discarded PS NAL units.

On success, *size holds the size (in bytes) of the output data buffer.

Parameters
buf_inaddress of the buffer holding the input data
sizeaddress of the variable holding the size (in bytes) of the input buffer (on input) and of the output buffer (on success)
buf_outon success, address of the variable holding the address of the output buffer
filter_pswhether to write parameter set NAL units to the output (0) or to discard them (non-zero)
ps_countaddress of the variable where the number of discarded parameter set NAL units shall be written, may be NULL
Returns
0 in case of success, a negative value corresponding to an AVERROR code in case of failure
Note
*buf_out will be treated as uninitialized on input and won't be freed.

Definition at line 901 of file vvc.c.

Referenced by ff_mov_write_packet().

◆ ff_isom_write_vvcc()

int ff_isom_write_vvcc ( AVIOContext pb,
const uint8_t *  data,
int  size,
int  ps_array_completeness 
)

Writes H.266/VVC extradata (parameter sets, declarative SEI NAL units) to the provided AVIOContext.

If the extradata is Annex B format, it gets converted to vvcC format before writing.

Parameters
pbaddress of the AVIOContext where the vvcC shall be written
dataaddress of the buffer holding the data needed to write the vvcC
sizesize (in bytes) of the data buffer
ps_array_completenesswhether all parameter sets are in the vvcC (1) or there may be additional parameter sets in the bitstream (0)
Returns
>=0 in case of success, a negative value corresponding to an AVERROR code in case of failure

Definition at line 922 of file vvc.c.

Referenced by mov_write_vvcc_tag().