av1.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "libavcodec/av1.h"
#include "libavcodec/av1_parse.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/put_bits.h"
#include "av1.h"
#include "avio.h"
#include "avio_internal.h"

Go to the source code of this file.

Functions
static int	av1_filter_obus (AVIOContext *pb, const uint8_t *buf, int size, int *offset)
int	ff_av1_filter_obus (AVIOContext *pb, const uint8_t *buf, int size)
	Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and write the resulting bitstream to the provided AVIOContext. More...
int	ff_av1_filter_obus_buf (const uint8_t *in, uint8_t **out, int *size, int *offset)
	Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and return the result in a data buffer, avoiding allocations and copies if possible. More...
static void	uvlc (GetBitContext *gb)
static int	parse_color_config (AV1SequenceParameters *seq_params, GetBitContext *gb)
static int	parse_sequence_header (AV1SequenceParameters *seq_params, const uint8_t *buf, int size)
int	ff_av1_parse_seq_header (AV1SequenceParameters *seq, const uint8_t *buf, int size)
	Parses a Sequence Header from the the provided buffer. More...
int	ff_isom_write_av1c (AVIOContext *pb, const uint8_t *buf, int size, int write_seq_header)
	Writes AV1 extradata (Sequence Header and Metadata OBUs) to the provided AVIOContext. More...

Function Documentation

av1_filter_obus()

static int av1_filter_obus ( AVIOContext *  pb, const uint8_t *  buf, int  size, int *  offset  )

static

Definition at line 32 of file av1.c.

Referenced by ff_av1_filter_obus(), and ff_av1_filter_obus_buf().

ff_av1_filter_obus()

int ff_av1_filter_obus	(	AVIOContext *	pb,
		const uint8_t *	buf,
		int	size
	)

Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and write the resulting bitstream to the provided AVIOContext.

Parameters

pb	pointer to the AVIOContext where the filtered bitstream shall be written; may be NULL, in which case nothing is written.
buf	input data buffer
size	size of the input data buffer

Returns

the amount of bytes written (or would have been written in case pb had been supplied) in case of success, a negative AVERROR code in case of failure

Note

One can use NULL for pb to just get the output size.

Definition at line 82 of file av1.c.

Referenced by ff_mov_write_packet(), and mkv_reformat_av1().

ff_av1_filter_obus_buf()

int ff_av1_filter_obus_buf	(	const uint8_t *	in,
		uint8_t **	out,
		int *	size,
		int *	offset
	)

Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and return the result in a data buffer, avoiding allocations and copies if possible.

Parameters

in	input data buffer
out	pointer to pointer for the returned buffer. In case of success, it is independently allocated if and only if *out differs from in.
size	size of the input data buffer. The size of the resulting output data buffer will be written here
offset	offset of the returned data inside *out: It runs from *out + offset (inclusive) to *out + offset + size (exclusive); is zero if *out is independently allocated.

Returns

0 in case of success, a negative AVERROR code in case of failure. On failure, *out and *size are unchanged

Note

*out will be treated as unintialized on input and will not be freed.

Definition at line 87 of file av1.c.

Referenced by ff_mov_write_packet().

uvlc()

static void uvlc ( GetBitContext *  gb )

inlinestatic

Definition at line 124 of file av1.c.

Referenced by parse_sequence_header().

parse_color_config()

static int parse_color_config ( AV1SequenceParameters *  seq_params, GetBitContext *  gb  )

static

Definition at line 140 of file av1.c.

Referenced by parse_sequence_header().

parse_sequence_header()

static int parse_sequence_header ( AV1SequenceParameters *  seq_params, const uint8_t *  buf, int  size  )

static

Definition at line 206 of file av1.c.

Referenced by ff_av1_parse_seq_header(), and ff_isom_write_av1c().

ff_av1_parse_seq_header()

int ff_av1_parse_seq_header	(	AV1SequenceParameters *	seq,
		const uint8_t *	buf,
		int	size
	)

Parses a Sequence Header from the the provided buffer.

Parameters

seq	pointer to the AV1SequenceParameters where the parsed values will be written
buf	input data buffer
size	size in bytes of the input data buffer

Returns

>= 0 in case of success, a negative AVERROR code in case of failure

Definition at line 335 of file av1.c.

Referenced by set_codec_str().

ff_isom_write_av1c()

int ff_isom_write_av1c	(	AVIOContext *	pb,
		const uint8_t *	buf,
		int	size,
		int	write_seq_header
	)

Writes AV1 extradata (Sequence Header and Metadata OBUs) to the provided AVIOContext.

Parameters

pb	pointer to the AVIOContext where the av1C box shall be written
buf	input data buffer
size	size in bytes of the input data buffer
write_seq_header	If 1, Sequence Header OBU will be written inside the av1C box. Otherwise, Sequence Header OBU will be omitted.

Returns

>= 0 in case of success, a negative AVERROR code in case of failure

Definition at line 398 of file av1.c.

Referenced by mkv_assemble_native_codecprivate(), and mov_write_av1c_tag().