Functions

gst_av1_bit_writer_frame_header_obu

GstAV1BitWriterResult
gst_av1_bit_writer_frame_header_obu (GstAV1FrameHeaderOBU * frame_hdr,
                                     GstAV1SequenceHeaderOBU * seq_hdr,
                                     guint8 temporal_id,
                                     guint8 spatial_id,
                                     gboolean size_field,
                                     guint8 * data,
                                     guint * size)

Generating the according AV1 bit stream OBU by providing the frame header.

Parameters:

frame_hdr

the frame header of GstAV1FrameHeaderOBU to write

seq_hdr

the sequence header of GstAV1SequenceHeaderOBU to refer

temporal_id

specifies the temporal level of the data contained in the OBU.

spatial_id

specifies the spatial level of the data contained in the OBU.

size_field

whether the OBU header contains the OBU size.

data

the bit stream generated by the frame header

size

the size in bytes of the input and output

Since : 1.22


gst_av1_bit_writer_frame_header_obu_with_offsets

GstAV1BitWriterResult
gst_av1_bit_writer_frame_header_obu_with_offsets (GstAV1FrameHeaderOBU * frame_hdr,
                                                  GstAV1SequenceHeaderOBU * seq_hdr,
                                                  guint8 temporal_id,
                                                  guint8 spatial_id,
                                                  gboolean size_field,
                                                  guint size_field_size,
                                                  guint * qindex_offset,
                                                  guint * segmentation_offset,
                                                  guint * lf_offset,
                                                  guint * cdef_offset,
                                                  guint * cdef_size,
                                                  guint8 * data,
                                                  guint * size)

While Generating the according AV1 bit stream OBU by providing the frame header, this function also return bit offsets of qindex, segmentation and cdef, etc. These offsets can help to change the content of these fields later. This function is useful if the encoder may change the content of the frame header after generating it. For example, some HW needs user to provide a frame header before the real encoding job, and it will change the according fields in the frame header during the real encoding job.

Parameters:

frame_hdr

the frame header of GstAV1FrameHeaderOBU to write

seq_hdr

the sequence header of GstAV1SequenceHeaderOBU to refer

temporal_id

specifies the temporal level of the data contained in the OBU.

spatial_id

specifies the spatial level of the data contained in the OBU.

size_field

whether the OBU header contains the OBU size.

size_field_size

0 means a fixed OBU header size field.

qindex_offset

return the qindex fields offset in bits.

segmentation_offset

return the segmentation fields offset in bits.

lf_offset

return the loopfilter fields offset in bits.

cdef_offset

return the cdef fields offset in bits.

cdef_size

return the cdef fields size in bits.

data

the bit stream generated by the frame header

size

the size in bytes of the input and output

Since : 1.22


gst_av1_bit_writer_metadata_obu

GstAV1BitWriterResult
gst_av1_bit_writer_metadata_obu (GstAV1MetadataOBU * metadata,
                                 guint8 temporal_id,
                                 guint8 spatial_id,
                                 gboolean size_field,
                                 guint8 * data,
                                 guint * size)

Generating the according AV1 bit stream OBU by providing the meta data.

Parameters:

metadata

the meta data of GstAV1MetadataOBU to write

temporal_id

specifies the temporal level of the data contained in the OBU.

spatial_id

specifies the spatial level of the data contained in the OBU.

size_field

whether the header contain size feild

data

the bit stream generated by the meta data

size

the size in bytes of the input and output

Since : 1.22


gst_av1_bit_writer_sequence_header_obu

GstAV1BitWriterResult
gst_av1_bit_writer_sequence_header_obu (GstAV1SequenceHeaderOBU * seq_hdr,
                                        gboolean size_field,
                                        guint8 * data,
                                        guint * size)

Generating the according AV1 bit stream OBU by providing the sequence header.

Parameters:

seq_hdr

the sequence header of GstAV1SequenceHeaderOBU to write

size_field

whether the header contain size feild

data

the bit stream generated by the sequence header

size

the size in bytes of the input and output

Since : 1.22


gst_av1_bit_writer_temporal_delimiter_obu

GstAV1BitWriterResult
gst_av1_bit_writer_temporal_delimiter_obu (gboolean size_field,
                                           guint8 * data,
                                           guint * size)

Generating the according temporal delimiter AV1 bit stream OBU.

Parameters:

size_field

whether the header contain size feild

data

the bit stream generated

size

the size in bytes of the input and output

Since : 1.22


Enumerations

GstAV1BitWriterResult

typedef enum
{
  GST_AV1_BIT_WRITER_OK,
  GST_AV1_BIT_WRITER_INVALID_DATA,
  GST_AV1_BIT_WRITER_NO_MORE_SPACE,
  GST_AV1_BIT_WRITER_ERROR
} GstAV1BitWriterResult;

The result of writing AV1 data into bit stream.

Members

GST_AV1_BIT_WRITER_OK (0) –

The writing succeeded

GST_AV1_BIT_WRITER_INVALID_DATA (1) –

The input data to write is invalid

GST_AV1_BIT_WRITER_NO_MORE_SPACE (2) –

The output does not have enough size

GST_AV1_BIT_WRITER_ERROR (3) –

An general error occurred when writing

Since : 1.24


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