hevc.h File Reference

#include <stdint.h>
#include "avio.h"

Go to the source code of this file.

Functions
int	ff_hevc_annexb2mp4 (AVIOContext *pb, const uint8_t *buf_in, int size, int filter_ps, int *ps_count)
	Writes Annex B formatted HEVC NAL units to the provided AVIOContext. More...
int	ff_hevc_annexb2mp4_buf (const uint8_t *buf_in, uint8_t **buf_out, int *size, int filter_ps, int *ps_count)
	Writes Annex B formatted HEVC NAL units to a data buffer. More...
int	ff_isom_write_hvcc (AVIOContext *pb, const uint8_t *data, int size, int ps_array_completeness)
	Writes HEVC extradata (parameter sets and declarative SEI NAL units with nuh_layer_id == 0, as a HEVCDecoderConfigurationRecord) to the provided AVIOContext. More...
int	ff_isom_write_lhvc (AVIOContext *pb, const uint8_t *data, int size, int ps_array_completeness)
	Writes L-HEVC extradata (parameter sets with nuh_layer_id > 0, as a LHEVCDecoderConfigurationRecord) to the provided AVIOContext. More...

Detailed Description

internal header for HEVC (de)muxer utilities

Definition in file hevc.h.

Function Documentation

ff_hevc_annexb2mp4()

int ff_hevc_annexb2mp4	(	AVIOContext *	pb,
		const uint8_t *	buf_in,
		int	size,
		int	filter_ps,
		int *	ps_count
	)

Writes Annex B formatted HEVC 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 HEVC parameter sets found in the input will be discarded, and *ps_count will be set to the number of discarded PS NAL units.

Parameters

pb	address of the AVIOContext where the data shall be written
buf_in	address of the buffer holding the input data
size	size (in bytes) of the input buffer
filter_ps	whether to write parameter set NAL units to the output (0) or to discard them (non-zero)
ps_count	address 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 1078 of file hevc.c.

Referenced by ff_hevc_annexb2mp4_buf(), and ff_mov_write_packet().

ff_hevc_annexb2mp4_buf()

int ff_hevc_annexb2mp4_buf	(	const uint8_t *	buf_in,
		uint8_t **	buf_out,
		int *	size,
		int	filter_ps,
		int *	ps_count
	)

Writes Annex B formatted HEVC 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 HEVC 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_in	address of the buffer holding the input data
size	address of the variable holding the size (in bytes) of the input buffer (on input) and of the output buffer (on success)
buf_out	on success, address of the variable holding the address of the output buffer
filter_ps	whether to write parameter set NAL units to the output (0) or to discard them (non-zero)
ps_count	address 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 1126 of file hevc.c.

Referenced by ff_mov_write_packet(), and flv_write_packet().

ff_isom_write_hvcc()

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

Writes HEVC extradata (parameter sets and declarative SEI NAL units with nuh_layer_id == 0, as a HEVCDecoderConfigurationRecord) to the provided AVIOContext.

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

Parameters

pb	address of the AVIOContext where the hvcC shall be written
data	address of the buffer holding the data needed to write the hvcC
size	size (in bytes) of the data buffer
ps_array_completeness	whether all parameter sets are in the hvcC (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 1275 of file hevc.c.

Referenced by flv_write_codec_header(), mkv_assemble_native_codecprivate(), and mov_write_hvcc_tag().

ff_isom_write_lhvc()

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

Writes L-HEVC extradata (parameter sets with nuh_layer_id > 0, as a LHEVCDecoderConfigurationRecord) to the provided AVIOContext.

If the extradata is Annex B format, it gets converted to lhvC format before writing. Otherwise, hvcC formated extradata is expected, not lhvC.

Parameters

pb	address of the AVIOContext where the lhvC shall be written
data	address of the buffer holding the data needed to write the lhvC
size	size (in bytes) of the data buffer
ps_array_completeness	whether all parameter sets are in the lhvC (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 1282 of file hevc.c.

Referenced by mov_write_lhvc_tag().