#include <string.h>
#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/buffer.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "cbs.h"
#include "cbs_internal.h"
#include "refstruct.h"

Functions
av_cold int	ff_cbs_init (CodedBitstreamContext *ctx_ptr, enum AVCodecID codec_id, void log_ctx)
	Create and initialise a new context for the given codec. More...

av_cold void	ff_cbs_flush (CodedBitstreamContext *ctx)
	Reset all internal state in a context. More...

av_cold void	ff_cbs_close (CodedBitstreamContext **ctx_ptr)
	Close a context and free all internal state. More...

static void	cbs_unit_uninit (CodedBitstreamUnit *unit)

void	ff_cbs_fragment_reset (CodedBitstreamFragment *frag)
	Free the units contained in a fragment as well as the fragment's own data buffer, but not the units array itself. More...

av_cold void	ff_cbs_fragment_free (CodedBitstreamFragment *frag)
	Free the units array of a fragment in addition to what ff_cbs_fragment_reset does. More...

static int	cbs_read_fragment_content (CodedBitstreamContext ctx, CodedBitstreamFragment frag)

static int	cbs_fill_fragment_data (CodedBitstreamFragment frag, const uint8_t data, size_t size)

static int	cbs_read_data (CodedBitstreamContext ctx, CodedBitstreamFragment frag, AVBufferRef buf, const uint8_t data, size_t size, int header)

int	ff_cbs_read_extradata (CodedBitstreamContext ctx, CodedBitstreamFragment frag, const AVCodecParameters *par)
	Read the extradata bitstream found in codec parameters into a fragment, then split into units and decompose. More...

int	ff_cbs_read_extradata_from_codec (CodedBitstreamContext ctx, CodedBitstreamFragment frag, const AVCodecContext *avctx)

int	ff_cbs_read_packet (CodedBitstreamContext ctx, CodedBitstreamFragment frag, const AVPacket *pkt)
	Read the data bitstream from a packet into a fragment, then split into units and decompose. More...

int	ff_cbs_read_packet_side_data (CodedBitstreamContext ctx, CodedBitstreamFragment frag, const AVPacket *pkt)

int	ff_cbs_read (CodedBitstreamContext ctx, CodedBitstreamFragment frag, const uint8_t *data, size_t size)
	Read a bitstream from a memory region into a fragment, then split into units and decompose. More...

static int	cbs_alloc_unit_data (CodedBitstreamUnit *unit, size_t size)
	Allocate a new internal data buffer of the given size in the unit. More...

static int	cbs_write_unit_data (CodedBitstreamContext ctx, CodedBitstreamUnit unit)

int	ff_cbs_write_fragment_data (CodedBitstreamContext ctx, CodedBitstreamFragment frag)
	Write the content of the fragment to its own internal buffer. More...

int	ff_cbs_write_extradata (CodedBitstreamContext ctx, AVCodecParameters par, CodedBitstreamFragment *frag)
	Write the bitstream of a fragment to the extradata in codec parameters. More...

int	ff_cbs_write_packet (CodedBitstreamContext ctx, AVPacket pkt, CodedBitstreamFragment *frag)
	Write the bitstream of a fragment to a packet. More...

void	ff_cbs_trace_header (CodedBitstreamContext ctx, const char name)

void	ff_cbs_trace_read_log (void trace_context, GetBitContext gbc, int length, const char str, const int subscripts, int64_t value)
	Helper function for read tracing which formats the syntax element and logs the result. More...

void	ff_cbs_trace_write_log (void trace_context, PutBitContext pbc, int length, const char str, const int subscripts, int64_t value)
	Helper function for write tracing which formats the syntax element and logs the result. More...

static av_always_inline int	cbs_read_unsigned (CodedBitstreamContext ctx, GetBitContext gbc, int width, const char name, const int subscripts, uint32_t *write_to, uint32_t range_min, uint32_t range_max)

int	ff_cbs_read_unsigned (CodedBitstreamContext ctx, GetBitContext gbc, int width, const char name, const int subscripts, uint32_t *write_to, uint32_t range_min, uint32_t range_max)

int	ff_cbs_read_simple_unsigned (CodedBitstreamContext ctx, GetBitContext gbc, int width, const char name, uint32_t write_to)

int	ff_cbs_write_unsigned (CodedBitstreamContext ctx, PutBitContext pbc, int width, const char name, const int subscripts, uint32_t value, uint32_t range_min, uint32_t range_max)

int	ff_cbs_write_simple_unsigned (CodedBitstreamContext ctx, PutBitContext pbc, int width, const char *name, uint32_t value)

int	ff_cbs_read_signed (CodedBitstreamContext ctx, GetBitContext gbc, int width, const char name, const int subscripts, int32_t *write_to, int32_t range_min, int32_t range_max)

int	ff_cbs_write_signed (CodedBitstreamContext ctx, PutBitContext pbc, int width, const char name, const int subscripts, int32_t value, int32_t range_min, int32_t range_max)

static int	cbs_insert_unit (CodedBitstreamFragment *frag, int position)

int	ff_cbs_insert_unit_content (CodedBitstreamFragment frag, int position, CodedBitstreamUnitType type, void content, void *content_ref)
	Insert a new unit into a fragment with the given content. More...

static int	cbs_insert_unit_data (CodedBitstreamFragment frag, CodedBitstreamUnitType type, uint8_t data, size_t data_size, AVBufferRef *data_buf, int position)

int	ff_cbs_append_unit_data (CodedBitstreamFragment frag, CodedBitstreamUnitType type, uint8_t data, size_t data_size, AVBufferRef *data_buf)
	Add a new unit to a fragment with the given data bitstream. More...

void	ff_cbs_delete_unit (CodedBitstreamFragment *frag, int position)
	Delete a unit from a fragment and free all memory it uses. More...

static void	cbs_default_free_unit_content (FFRefStructOpaque opaque, void *content)

static const CodedBitstreamUnitTypeDescriptor *	cbs_find_unit_type_desc (CodedBitstreamContext ctx, CodedBitstreamUnit unit)

static void *	cbs_alloc_content (const CodedBitstreamUnitTypeDescriptor *desc)

int	ff_cbs_alloc_unit_content (CodedBitstreamContext ctx, CodedBitstreamUnit unit)
	Allocate a new internal content buffer matching the type of the unit. More...

static int	cbs_clone_noncomplex_unit_content (void *clonep, const CodedBitstreamUnit unit, const CodedBitstreamUnitTypeDescriptor *desc)

static int	cbs_clone_unit_content (CodedBitstreamContext ctx, CodedBitstreamUnit unit)

int	ff_cbs_make_unit_refcounted (CodedBitstreamContext ctx, CodedBitstreamUnit unit)
	Make the content of a unit refcounted. More...

int	ff_cbs_make_unit_writable (CodedBitstreamContext ctx, CodedBitstreamUnit unit)
	Make the content of a unit writable so that internal fields can be modified. More...

void	ff_cbs_discard_units (CodedBitstreamContext ctx, CodedBitstreamFragment frag, enum AVDiscard skip, int flags)
	Discard units accroding to 'skip'. More...

Variables
static const CodedBitstreamType *const	cbs_type_table []

enum AVCodecID	ff_cbs_all_codec_ids []
	Table of all supported codec IDs. More...

Function Documentation

◆ ff_cbs_init()

av_cold int ff_cbs_init	(	CodedBitstreamContext **	ctx_ptr,
		enum AVCodecID	codec_id,
		void *	log_ctx
	)

Create and initialise a new context for the given codec.

Definition at line 90 of file cbs.c.

Referenced by av1_decode_init(), av1_frame_merge_init(), av1_frame_split_init(), av1_parser_init(), d3d12va_encode_hevc_configure(), dts2pts_init(), ff_cbs_bsf_generic_init(), filter_units_init(), parse_feedback_units(), trace_headers_init(), vaapi_encode_av1_configure(), vaapi_encode_h264_configure(), vaapi_encode_h265_configure(), vaapi_encode_mjpeg_configure(), vaapi_encode_mpeg2_configure(), vulkan_encode_h264_init(), vulkan_encode_h265_init(), vvc_decode_init(), and vvc_parser_init().

◆ ff_cbs_flush()

av_cold void ff_cbs_flush ( CodedBitstreamContext * ctx )

Reset all internal state in a context.

Definition at line 136 of file cbs.c.

Referenced by av1_decode_flush(), and dts2pts_flush().

◆ ff_cbs_close()

av_cold void ff_cbs_close ( CodedBitstreamContext ** ctx_ptr )

Close a context and free all internal state.

Definition at line 142 of file cbs.c.

Referenced by av1_decode_free(), av1_frame_merge_close(), av1_frame_split_close(), av1_parser_close(), d3d12va_encode_hevc_close(), dts2pts_close(), ff_cbs_bsf_generic_close(), filter_units_close(), parse_feedback_units(), trace_headers_close(), vaapi_encode_av1_close(), vaapi_encode_h264_close(), vaapi_encode_h265_close(), vaapi_encode_mjpeg_close(), vaapi_encode_mpeg2_close(), vvc_decode_free(), and vvc_parser_close().

◆ cbs_unit_uninit()

static void cbs_unit_uninit ( CodedBitstreamUnit * unit )

static

Definition at line 161 of file cbs.c.

Referenced by ff_cbs_delete_unit(), and ff_cbs_fragment_reset().

◆ ff_cbs_fragment_reset()

void ff_cbs_fragment_reset ( CodedBitstreamFragment * frag )

Free the units contained in a fragment as well as the fragment's own data buffer, but not the units array itself.

Definition at line 172 of file cbs.c.

Referenced by av1_decode_flush(), av1_decode_init(), av1_frame_merge_filter(), av1_frame_merge_flush(), av1_frame_split_filter(), av1_frame_split_flush(), av1_frame_split_init(), av1_parser_parse(), av1_receive_frame(), av1_receive_frame_internal(), cbs_bsf_update_side_data(), d3d12va_encode_hevc_write_sequence_header(), decode_nal_units(), dts2pts_flush(), dts2pts_init(), ff_cbs_bsf_generic_filter(), ff_cbs_bsf_generic_init(), ff_cbs_fragment_free(), filter_units_filter(), filter_units_init(), h264_filter(), parse_nal_units(), trace_headers(), trace_headers_init(), vaapi_encode_av1_init_picture_params(), vaapi_encode_av1_init_sequence_params(), vaapi_encode_av1_write_extra_header(), vaapi_encode_av1_write_picture_header(), vaapi_encode_h264_write_extra_header(), vaapi_encode_h264_write_sequence_header(), vaapi_encode_h264_write_slice_header(), vaapi_encode_h265_write_extra_header(), vaapi_encode_h265_write_sequence_header(), vaapi_encode_h265_write_slice_header(), vaapi_encode_mjpeg_write_image_header(), vaapi_encode_mpeg2_write_picture_header(), vaapi_encode_mpeg2_write_sequence_header(), vvc_parser_parse(), write_extra_headers(), write_filler(), and write_sequence_headers().

◆ ff_cbs_fragment_free()

av_cold void ff_cbs_fragment_free ( CodedBitstreamFragment * frag )

Free the units array of a fragment in addition to what ff_cbs_fragment_reset does.

Definition at line 186 of file cbs.c.

Referenced by av1_decode_free(), av1_frame_merge_close(), av1_frame_split_close(), av1_parser_close(), d3d12va_encode_hevc_close(), dts2pts_close(), ff_cbs_bsf_generic_close(), ff_cbs_discard_units(), filter_units_close(), parse_feedback_units(), trace_headers_close(), vaapi_encode_av1_close(), vaapi_encode_h264_close(), vaapi_encode_h265_close(), vaapi_encode_mjpeg_close(), vaapi_encode_mpeg2_close(), vvc_decode_free(), and vvc_parser_close().

◆ cbs_read_fragment_content()

static int cbs_read_fragment_content	(	CodedBitstreamContext *	ctx,
		CodedBitstreamFragment *	frag
	)

static

Definition at line 194 of file cbs.c.

Referenced by cbs_read_data().

◆ cbs_fill_fragment_data()

static int cbs_fill_fragment_data	(	CodedBitstreamFragment *	frag,
		const uint8_t *	data,
		size_t	size
	)

static

Definition at line 237 of file cbs.c.

Referenced by cbs_read_data().

◆ cbs_read_data()

static int cbs_read_data	(	CodedBitstreamContext *	ctx,
		CodedBitstreamFragment *	frag,
		AVBufferRef *	buf,
		const uint8_t *	data,
		size_t	size,
		int	header
	)

static

Definition at line 257 of file cbs.c.

Referenced by ff_cbs_read(), ff_cbs_read_extradata(), ff_cbs_read_extradata_from_codec(), ff_cbs_read_packet(), and ff_cbs_read_packet_side_data().

◆ ff_cbs_read_extradata()

int ff_cbs_read_extradata	(	CodedBitstreamContext *	ctx,
		CodedBitstreamFragment *	frag,
		const AVCodecParameters *	par
	)

Read the extradata bitstream found in codec parameters into a fragment, then split into units and decompose.

This also updates the internal state, so will need to be called for codecs with extradata to read parameter sets necessary for further parsing even if the fragment itself is not desired.

The fragment must have been zeroed or reset via ff_cbs_fragment_reset before use.

Definition at line 286 of file cbs.c.

Referenced by av1_frame_split_init(), dts2pts_init(), ff_cbs_bsf_generic_init(), filter_units_init(), and trace_headers_init().

◆ ff_cbs_read_extradata_from_codec()

int ff_cbs_read_extradata_from_codec	(	CodedBitstreamContext *	ctx,
		CodedBitstreamFragment *	frag,
		const AVCodecContext *	avctx
	)

Definition at line 295 of file cbs.c.

Referenced by av1_decode_init(), av1_parser_parse(), vvc_decode_init(), and vvc_parser_parse().

◆ ff_cbs_read_packet()

int ff_cbs_read_packet	(	CodedBitstreamContext *	ctx,
		CodedBitstreamFragment *	frag,
		const AVPacket *	pkt
	)

Read the data bitstream from a packet into a fragment, then split into units and decompose.

This also updates the internal state of the coded bitstream context with any persistent data from the fragment which may be required to read following fragments (e.g. parameter sets).

The fragment must have been zeroed or reset via ff_cbs_fragment_reset before use.

Definition at line 304 of file cbs.c.

Referenced by av1_frame_merge_filter(), av1_frame_split_filter(), av1_receive_frame(), decode_nal_units(), ff_cbs_bsf_generic_filter(), filter_units_filter(), h264_filter(), and trace_headers().

◆ ff_cbs_read_packet_side_data()

int ff_cbs_read_packet_side_data	(	CodedBitstreamContext *	ctx,
		CodedBitstreamFragment *	frag,
		const AVPacket *	pkt
	)

Definition at line 312 of file cbs.c.

Referenced by cbs_bsf_update_side_data(), and trace_headers().

◆ ff_cbs_read()

int ff_cbs_read	(	CodedBitstreamContext *	ctx,
		CodedBitstreamFragment *	frag,
		const uint8_t *	data,
		size_t	size
	)

Read a bitstream from a memory region into a fragment, then split into units and decompose.

This also updates the internal state of the coded bitstream context with any persistent data from the fragment which may be required to read following fragments (e.g. parameter sets).

The fragment must have been zeroed or reset via ff_cbs_fragment_reset before use.

Definition at line 325 of file cbs.c.

Referenced by av1_parser_parse(), parse_feedback_units(), and parse_nal_units().

◆ cbs_alloc_unit_data()

static int cbs_alloc_unit_data	(	CodedBitstreamUnit *	unit,
		size_t	size
	)

static

Allocate a new internal data buffer of the given size in the unit.

The data buffer will have input padding.

Definition at line 338 of file cbs.c.

Referenced by cbs_write_unit_data().

◆ cbs_write_unit_data()

static int cbs_write_unit_data	(	CodedBitstreamContext *	ctx,
		CodedBitstreamUnit *	unit
	)

static

Definition at line 355 of file cbs.c.

Referenced by ff_cbs_write_fragment_data().

◆ ff_cbs_write_fragment_data()

int ff_cbs_write_fragment_data	(	CodedBitstreamContext *	ctx,
		CodedBitstreamFragment *	frag
	)

Write the content of the fragment to its own internal buffer.

Writes the content of all units and then assembles them into a new data buffer. When modifying the content of decomposed units, this can be used to regenerate the bitstream form of units or the whole fragment so that it can be extracted for other use.

This also updates the internal state of the coded bitstream context with any persistent data from the fragment which may be required to write following fragments (e.g. parameter sets).

Definition at line 409 of file cbs.c.

Referenced by cbs_bsf_update_side_data(), d3d12va_encode_hevc_write_access_unit(), ff_cbs_write_extradata(), ff_cbs_write_packet(), vaapi_encode_av1_write_obu(), vaapi_encode_h264_write_access_unit(), vaapi_encode_h265_write_access_unit(), vaapi_encode_mjpeg_write_image_header(), vaapi_encode_mpeg2_write_fragment(), and write_access_unit().

◆ ff_cbs_write_extradata()

int ff_cbs_write_extradata	(	CodedBitstreamContext *	ctx,
		AVCodecParameters *	par,
		CodedBitstreamFragment *	frag
	)

Write the bitstream of a fragment to the extradata in codec parameters.

Modifies context and fragment as ff_cbs_write_fragment_data does and replaces any existing extradata in the structure.

Definition at line 445 of file cbs.c.

Referenced by ff_cbs_bsf_generic_init(), and filter_units_init().

◆ ff_cbs_write_packet()

int ff_cbs_write_packet	(	CodedBitstreamContext *	ctx,
		AVPacket *	pkt,
		CodedBitstreamFragment *	frag
	)

Write the bitstream of a fragment to a packet.

Modifies context and fragment as ff_cbs_write_fragment_data does.

On success, the packet's buf is unreferenced and its buf, data and size fields are set to the corresponding values from the newly updated fragment; other fields are not touched. On failure, the packet is not touched at all.

Definition at line 474 of file cbs.c.

Referenced by av1_frame_merge_filter(), ff_cbs_bsf_generic_filter(), and filter_units_filter().

◆ ff_cbs_trace_header()

void ff_cbs_trace_header	(	CodedBitstreamContext *	ctx,
		const char *	name
	)

Definition at line 499 of file cbs.c.

◆ ff_cbs_trace_read_log()

void ff_cbs_trace_read_log	(	void *	trace_context,
		struct GetBitContext *	gbc,
		int	length,
		const char *	str,
		const int *	subscripts,
		int64_t	value
	)

Helper function for read tracing which formats the syntax element and logs the result.

Trace context should be set to the CodedBitstreamContext.

Definition at line 508 of file cbs.c.

Referenced by ff_cbs_trace_write_log(), and trace_headers_init().

◆ ff_cbs_trace_write_log()

void ff_cbs_trace_write_log	(	void *	trace_context,
		struct PutBitContext *	pbc,
		int	length,
		const char *	str,
		const int *	subscripts,
		int64_t	value
	)

Helper function for write tracing which formats the syntax element and logs the result.

Trace context should be set to the CodedBitstreamContext.

Definition at line 566 of file cbs.c.

Referenced by ff_cbs_bsf_generic_init().

◆ cbs_read_unsigned()

static av_always_inline int cbs_read_unsigned	(	CodedBitstreamContext *	ctx,
		GetBitContext *	gbc,
		int	width,
		const char *	name,
		const int *	subscripts,
		uint32_t *	write_to,
		uint32_t	range_min,
		uint32_t	range_max
	)

static

Definition at line 596 of file cbs.c.

Referenced by ff_cbs_read_simple_unsigned(), and ff_cbs_read_unsigned().

◆ ff_cbs_read_unsigned()

int ff_cbs_read_unsigned	(	CodedBitstreamContext *	ctx,
		GetBitContext *	gbc,
		int	width,
		const char *	name,
		const int *	subscripts,
		uint32_t *	write_to,
		uint32_t	range_min,
		uint32_t	range_max
	)

Definition at line 631 of file cbs.c.

◆ ff_cbs_read_simple_unsigned()

int ff_cbs_read_simple_unsigned	(	CodedBitstreamContext *	ctx,
		GetBitContext *	gbc,
		int	width,
		const char *	name,
		uint32_t *	write_to
	)

Definition at line 640 of file cbs.c.

Referenced by cbs_av1_read_subexp().

◆ ff_cbs_write_unsigned()

int ff_cbs_write_unsigned	(	CodedBitstreamContext *	ctx,
		PutBitContext *	pbc,
		int	width,
		const char *	name,
		const int *	subscripts,
		uint32_t	value,
		uint32_t	range_min,
		uint32_t	range_max
	)

Definition at line 647 of file cbs.c.

Referenced by ff_cbs_write_simple_unsigned().

◆ ff_cbs_write_simple_unsigned()

int ff_cbs_write_simple_unsigned	(	CodedBitstreamContext *	ctx,
		PutBitContext *	pbc,
		int	width,
		const char *	name,
		uint32_t	value
	)

Definition at line 676 of file cbs.c.

Referenced by cbs_av1_write_subexp().

◆ ff_cbs_read_signed()

int ff_cbs_read_signed	(	CodedBitstreamContext *	ctx,
		GetBitContext *	gbc,
		int	width,
		const char *	name,
		const int *	subscripts,
		int32_t *	write_to,
		int32_t	range_min,
		int32_t	range_max
	)

Definition at line 683 of file cbs.c.

◆ ff_cbs_write_signed()

int ff_cbs_write_signed	(	CodedBitstreamContext *	ctx,
		PutBitContext *	pbc,
		int	width,
		const char *	name,
		const int *	subscripts,
		int32_t	value,
		int32_t	range_min,
		int32_t	range_max
	)

Definition at line 715 of file cbs.c.

◆ cbs_insert_unit()

static int cbs_insert_unit	(	CodedBitstreamFragment *	frag,
		int	position
	)

static

Definition at line 745 of file cbs.c.

Referenced by cbs_insert_unit_data(), and ff_cbs_insert_unit_content().

◆ ff_cbs_insert_unit_content()

int ff_cbs_insert_unit_content	(	CodedBitstreamFragment *	frag,
		int	position,
		CodedBitstreamUnitType	type,
		void *	content,
		void *	content_ref
	)

Insert a new unit into a fragment with the given content.

If content_ref is supplied, it has to be a RefStruct reference backing content; the user keeps ownership of the supplied reference. The content structure continues to be owned by the caller if content_ref is not supplied.

Definition at line 783 of file cbs.c.

Referenced by av1_frame_merge_filter(), av1_metadata_update_fragment(), cbs_sei_get_unit(), d3d12va_encode_hevc_add_nal(), h264_metadata_insert_aud(), h265_metadata_update_fragment(), h266_metadata_update_fragment(), mpeg2_metadata_update_fragment(), vaapi_encode_av1_add_obu(), vaapi_encode_h264_add_nal(), vaapi_encode_h265_add_nal(), vaapi_encode_mjpeg_write_image_header(), vaapi_encode_mpeg2_add_header(), vulkan_encode_h264_add_nal(), and vulkan_encode_h265_add_nal().

◆ cbs_insert_unit_data()

static int cbs_insert_unit_data	(	CodedBitstreamFragment *	frag,
		CodedBitstreamUnitType	type,
		uint8_t *	data,
		size_t	data_size,
		AVBufferRef *	data_buf,
		int	position
	)

static

Definition at line 813 of file cbs.c.

Referenced by ff_cbs_append_unit_data().

◆ ff_cbs_append_unit_data()

int ff_cbs_append_unit_data	(	CodedBitstreamFragment *	frag,
		CodedBitstreamUnitType	type,
		uint8_t *	data,
		size_t	data_size,
		AVBufferRef *	data_buf
	)

Add a new unit to a fragment with the given data bitstream.

If data_buf is not supplied then data must have been allocated with av_malloc() and will on success become owned by the unit after this call or freed on error.

Definition at line 850 of file cbs.c.

Referenced by cbs_av1_split_fragment(), cbs_h2645_fragment_add_nals(), cbs_jpeg_split_fragment(), cbs_mpeg2_split_fragment(), cbs_vp8_split_fragment(), and cbs_vp9_split_fragment().

◆ ff_cbs_delete_unit()

void ff_cbs_delete_unit	(	CodedBitstreamFragment *	frag,
		int	position
	)

Delete a unit from a fragment and free all memory it uses.

Requires position to be >= 0 and < frag->nb_units.

Definition at line 860 of file cbs.c.

Referenced by av1_metadata_update_fragment(), dovi_rpu_update_fragment_av1(), dovi_rpu_update_fragment_hevc(), ff_cbs_discard_units(), filter_units_filter(), h264_metadata_update_fragment(), h265_metadata_update_fragment(), and h266_metadata_update_fragment().

◆ cbs_default_free_unit_content()

static void cbs_default_free_unit_content	(	FFRefStructOpaque	opaque,
		void *	content
	)

static

Definition at line 876 of file cbs.c.

Referenced by cbs_alloc_content().

◆ cbs_find_unit_type_desc()

static const CodedBitstreamUnitTypeDescriptor* cbs_find_unit_type_desc	(	CodedBitstreamContext *	ctx,
		CodedBitstreamUnit *	unit
	)

static

Definition at line 887 of file cbs.c.

Referenced by cbs_clone_unit_content(), and ff_cbs_alloc_unit_content().

◆ cbs_alloc_content()

static void* cbs_alloc_content ( const CodedBitstreamUnitTypeDescriptor * desc )

static

Definition at line 914 of file cbs.c.

Referenced by cbs_clone_noncomplex_unit_content(), and ff_cbs_alloc_unit_content().

◆ ff_cbs_alloc_unit_content()

int ff_cbs_alloc_unit_content	(	CodedBitstreamContext *	ctx,
		CodedBitstreamUnit *	unit
	)

Allocate a new internal content buffer matching the type of the unit.

The content will be zeroed.

Definition at line 923 of file cbs.c.

Referenced by cbs_av1_read_unit(), cbs_h264_read_nal_unit(), cbs_h265_read_nal_unit(), cbs_h266_read_nal_unit(), cbs_jpeg_read_unit(), cbs_mpeg2_read_unit(), cbs_sei_get_unit(), cbs_vp8_read_unit(), and cbs_vp9_read_unit().

◆ cbs_clone_noncomplex_unit_content()

static int cbs_clone_noncomplex_unit_content	(	void **	clonep,
		const CodedBitstreamUnit *	unit,
		const CodedBitstreamUnitTypeDescriptor *	desc
	)

static

Definition at line 942 of file cbs.c.

Referenced by cbs_clone_unit_content().

◆ cbs_clone_unit_content()

static int cbs_clone_unit_content	(	CodedBitstreamContext *	ctx,
		CodedBitstreamUnit *	unit
	)

static

Definition at line 1001 of file cbs.c.

Referenced by ff_cbs_make_unit_refcounted(), and ff_cbs_make_unit_writable().

◆ ff_cbs_make_unit_refcounted()

int ff_cbs_make_unit_refcounted	(	CodedBitstreamContext *	ctx,
		CodedBitstreamUnit *	unit
	)

Make the content of a unit refcounted.

If the unit is not refcounted, this will do a deep copy of the unit content to new refcounted buffers.

It is not valid to call this function on a unit which does not have decomposed content.

Definition at line 1035 of file cbs.c.

Referenced by cbs_av1_write_obu(), cbs_h2645_replace_ps(), and cbs_h266_replace_ph().

◆ ff_cbs_make_unit_writable()

int ff_cbs_make_unit_writable	(	CodedBitstreamContext *	ctx,
		CodedBitstreamUnit *	unit
	)

Make the content of a unit writable so that internal fields can be modified.

If it is known that there are no other references to the content of the unit, does nothing and returns success. Otherwise (including the case where the unit content is not refcounted), it does a full clone of the content (including any internal buffers) to make a new copy, and replaces the existing references inside the unit with that.

It is not valid to call this function on a unit which does not have decomposed content.

Definition at line 1044 of file cbs.c.

Referenced by h264_redundant_pps_fixup_pps().

◆ ff_cbs_discard_units()

void ff_cbs_discard_units	(	CodedBitstreamContext *	ctx,
		CodedBitstreamFragment *	frag,
		enum AVDiscard	skip,
		int	flags
	)

Discard units accroding to 'skip'.

Definition at line 1061 of file cbs.c.

Referenced by filter_units_filter().

Variable Documentation

◆ cbs_type_table

const CodedBitstreamType* const cbs_type_table[]

static

Initial value:

= {
 
}

Definition at line 35 of file cbs.c.

Referenced by ff_cbs_init().

◆ ff_cbs_all_codec_ids

enum AVCodecID ff_cbs_all_codec_ids[]

Initial value:

= {
 
    AV_CODEC_ID_NONE
}

Table of all supported codec IDs.

Terminated by AV_CODEC_ID_NONE.

Definition at line 62 of file cbs.c.

Functions

Variables

Function Documentation

◆ ff_cbs_init()

◆ ff_cbs_flush()

◆ ff_cbs_close()

◆ cbs_unit_uninit()

◆ ff_cbs_fragment_reset()

◆ ff_cbs_fragment_free()

◆ cbs_read_fragment_content()

◆ cbs_fill_fragment_data()

◆ cbs_read_data()

◆ ff_cbs_read_extradata()

◆ ff_cbs_read_extradata_from_codec()

◆ ff_cbs_read_packet()

◆ ff_cbs_read_packet_side_data()

◆ ff_cbs_read()

◆ cbs_alloc_unit_data()

◆ cbs_write_unit_data()

◆ ff_cbs_write_fragment_data()

◆ ff_cbs_write_extradata()

◆ ff_cbs_write_packet()

◆ ff_cbs_trace_header()

◆ ff_cbs_trace_read_log()

◆ ff_cbs_trace_write_log()

◆ cbs_read_unsigned()

◆ ff_cbs_read_unsigned()

◆ ff_cbs_read_simple_unsigned()

◆ ff_cbs_write_unsigned()

◆ ff_cbs_write_simple_unsigned()

◆ ff_cbs_read_signed()

◆ ff_cbs_write_signed()

◆ cbs_insert_unit()

◆ ff_cbs_insert_unit_content()

◆ cbs_insert_unit_data()

◆ ff_cbs_append_unit_data()

◆ ff_cbs_delete_unit()

◆ cbs_default_free_unit_content()

◆ cbs_find_unit_type_desc()

◆ cbs_alloc_content()

◆ ff_cbs_alloc_unit_content()

◆ cbs_clone_noncomplex_unit_content()

◆ cbs_clone_unit_content()

◆ ff_cbs_make_unit_refcounted()

◆ ff_cbs_make_unit_writable()

◆ ff_cbs_discard_units()

Variable Documentation

◆ cbs_type_table

◆ ff_cbs_all_codec_ids