#include <stddef.h>
#include <stdint.h>
#include "libavutil/buffer.h"
#include "codec_id.h"
#include "codec_par.h"
#include "defs.h"
#include "packet.h"
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Callback type for read tracing.
Callback type for write tracing.
Table of all supported codec IDs.
Terminated by AV_CODEC_ID_NONE.
Reset all internal state in a context.
Definition at line 140 of file cbs.c.
Referenced by trace_write_log().
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.
Read the extradata bitstream found in a codec context into a fragment, then split into units and decompose.
This acts identical to ff_cbs_read_extradata() for the case where you already have a codec context.
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.
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.
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 418 of file cbs.c.
Referenced by write_extradata(), and write_packet().
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.
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 176 of file cbs.c.
Referenced by fragment_free().
Free the units array of a fragment in addition to what ff_cbs_fragment_reset does.
Definition at line 190 of file cbs.c.
Referenced by discard_units().
Allocate a new internal content buffer matching the type of the unit.
The content will be zeroed.
Definition at line 939 of file cbs.c.
Referenced by cbs_apv_read_unit(), and cbs_av1_read_unit().
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.
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 866 of file cbs.c.
Referenced by cbs_apv_split_fragment(), and cbs_av1_split_fragment().
Delete a unit from a fragment and free all memory it uses.
Requires position to be >= 0 and < frag->nb_units.
Definition at line 876 of file cbs.c.
Referenced by discard_units().
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 1051 of file cbs.c.
Referenced by cbs_av1_write_obu().
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.
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 520 of file cbs.c.
Referenced by trace_write_log().
Helper function for write tracing which formats the syntax element and logs the result.
Trace context should be set to the CodedBitstreamContext.