main decoder context More...

Data Fields
AVCodecContext *	avctx
	codec context for av_log More...

AVFloatDSPContext *	fdsp

uint8_t	frame_data [MAX_FRAMESIZE+AV_INPUT_BUFFER_PADDING_SIZE]
	compressed frame data More...

PutBitContext	pb
	context for filling the frame_data buffer More...

FFTContext	mdct_ctx [WMAPRO_BLOCK_SIZES]
	MDCT context per block size. More...

float	tmp [WMAPRO_BLOCK_MAX_SIZE]
	IMDCT output buffer. More...

const float *	windows [WMAPRO_BLOCK_SIZES]
	windows for the different block sizes More...

uint32_t	decode_flags
	used compression features More...

uint8_t	len_prefix
	frame is prefixed with its length More...

uint8_t	dynamic_range_compression
	frame contains DRC data More...

uint8_t	bits_per_sample
	integer audio sample size for the unscaled IMDCT output (used to scale to [-1.0, 1.0]) More...

uint16_t	samples_per_frame
	number of samples to output More...

uint16_t	log2_frame_size

int8_t	lfe_channel
	lfe channel index More...

uint8_t	max_num_subframes

uint8_t	subframe_len_bits
	number of bits used for the subframe length More...

uint8_t	max_subframe_len_bit
	flag indicating that the subframe is of maximum size when the first subframe length bit is 1 More...

uint16_t	min_samples_per_subframe

int8_t	num_sfb [WMAPRO_BLOCK_SIZES]
	scale factor bands per block size More...

int16_t	sfb_offsets [WMAPRO_BLOCK_SIZES][MAX_BANDS]
	scale factor band offsets (multiples of 4) More...

int8_t	sf_offsets [WMAPRO_BLOCK_SIZES][WMAPRO_BLOCK_SIZES][MAX_BANDS]
	scale factor resample matrix More...

int16_t	subwoofer_cutoffs [WMAPRO_BLOCK_SIZES]
	subwoofer cutoff values More...

GetBitContext	pgb
	bitstream reader context for the packet More...

int	next_packet_start
	start offset of the next wma packet in the demuxer packet More...

uint8_t	packet_offset
	frame offset in the packet More...

uint8_t	packet_sequence_number
	current packet number More...

int	num_saved_bits
	saved number of bits More...

int	frame_offset
	frame offset in the bit reservoir More...

int	subframe_offset
	subframe offset in the bit reservoir More...

uint8_t	packet_loss
	set in case of bitstream error More...

uint8_t	packet_done
	set when a packet is fully decoded More...

uint32_t	frame_num
	current frame number (not used for decoding) More...

GetBitContext	gb
	bitstream reader context More...

int	buf_bit_size
	buffer size in bits More...

uint8_t	drc_gain
	gain for the DRC tool More...

int8_t	skip_frame
	skip output step More...

int8_t	parsed_all_subframes
	all subframes decoded? More...

uint8_t	skip_packets
	packets to skip to find next packet in a stream (XMA1/2) More...

int16_t	subframe_len
	current subframe length More...

int8_t	nb_channels
	number of channels in stream (XMA1/2) More...

int8_t	channels_for_cur_subframe
	number of channels that contain the subframe More...

int8_t	channel_indexes_for_cur_subframe [WMAPRO_MAX_CHANNELS]

int8_t	num_bands
	number of scale factor bands More...

int8_t	transmit_num_vec_coeffs
	number of vector coded coefficients is part of the bitstream More...

int16_t *	cur_sfb_offsets
	sfb offsets for the current block More...

uint8_t	table_idx
	index for the num_sfb, sfb_offsets, sf_offsets and subwoofer_cutoffs tables More...

int8_t	esc_len
	length of escaped coefficients More...

uint8_t	num_chgroups
	number of channel groups More...

WMAProChannelGrp	chgroup [WMAPRO_MAX_CHANNELS]
	channel group information More...

WMAProChannelCtx	channel [WMAPRO_MAX_CHANNELS]
	per channel data More...

Detailed Description

main decoder context

Definition at line 175 of file wmaprodec.c.

Field Documentation

◆ avctx

AVCodecContext* WMAProDecodeCtx::avctx

codec context for av_log

Definition at line 177 of file wmaprodec.c.

Referenced by decode_channel_transform(), decode_coeffs(), decode_frame(), decode_init(), decode_scale_factors(), decode_subframe(), decode_subframe_length(), decode_tilehdr(), and save_bits().

◆ fdsp

AVFloatDSPContext* WMAProDecodeCtx::fdsp

Definition at line 178 of file wmaprodec.c.

Referenced by decode_end(), decode_init(), decode_subframe(), inverse_channel_transform(), and wmapro_window().

◆ frame_data

uint8_t WMAProDecodeCtx::frame_data[MAX_FRAMESIZE+ AV_INPUT_BUFFER_PADDING_SIZE]

compressed frame data

Definition at line 180 of file wmaprodec.c.

Referenced by decode_init(), and save_bits().

◆ pb

PutBitContext WMAProDecodeCtx::pb

context for filling the frame_data buffer

Definition at line 181 of file wmaprodec.c.

Referenced by decode_init(), and save_bits().

◆ mdct_ctx

FFTContext WMAProDecodeCtx::mdct_ctx[WMAPRO_BLOCK_SIZES]

MDCT context per block size.

Definition at line 182 of file wmaprodec.c.

Referenced by decode_end(), decode_init(), and decode_subframe().

◆ tmp

float WMAProDecodeCtx::tmp[WMAPRO_BLOCK_MAX_SIZE]

IMDCT output buffer.

Definition at line 183 of file wmaprodec.c.

Referenced by decode_subframe().

◆ windows

const float* WMAProDecodeCtx::windows[WMAPRO_BLOCK_SIZES]

windows for the different block sizes

Definition at line 184 of file wmaprodec.c.

Referenced by decode_init(), and wmapro_window().

◆ decode_flags

uint32_t WMAProDecodeCtx::decode_flags

used compression features

Definition at line 187 of file wmaprodec.c.

Referenced by decode_init(), and dump_context().

◆ len_prefix

uint8_t WMAProDecodeCtx::len_prefix

frame is prefixed with its length

Definition at line 188 of file wmaprodec.c.

Referenced by decode_frame(), decode_init(), decode_packet(), and dump_context().

◆ dynamic_range_compression

uint8_t WMAProDecodeCtx::dynamic_range_compression

frame contains DRC data

Definition at line 189 of file wmaprodec.c.

Referenced by decode_frame(), and decode_init().

◆ bits_per_sample

uint8_t WMAProDecodeCtx::bits_per_sample

integer audio sample size for the unscaled IMDCT output (used to scale to [-1.0, 1.0])

Definition at line 190 of file wmaprodec.c.

Referenced by decode_init(), decode_subframe(), and dump_context().

◆ samples_per_frame

uint16_t WMAProDecodeCtx::samples_per_frame

number of samples to output

Definition at line 191 of file wmaprodec.c.

Referenced by decode_frame(), decode_init(), decode_subframe(), decode_subframe_length(), decode_tilehdr(), dump_context(), flush(), and wmapro_decode_packet().

◆ log2_frame_size

uint16_t WMAProDecodeCtx::log2_frame_size

Definition at line 192 of file wmaprodec.c.

Referenced by decode_frame(), decode_init(), decode_packet(), and dump_context().

◆ lfe_channel

int8_t WMAProDecodeCtx::lfe_channel

lfe channel index

Definition at line 193 of file wmaprodec.c.

Referenced by decode_init(), and decode_subframe().

◆ max_num_subframes

uint8_t WMAProDecodeCtx::max_num_subframes

Definition at line 194 of file wmaprodec.c.

Referenced by decode_init(), decode_tilehdr(), and dump_context().

◆ subframe_len_bits

uint8_t WMAProDecodeCtx::subframe_len_bits

number of bits used for the subframe length

Definition at line 195 of file wmaprodec.c.

Referenced by decode_init(), and decode_subframe_length().

◆ max_subframe_len_bit

uint8_t WMAProDecodeCtx::max_subframe_len_bit

flag indicating that the subframe is of maximum size when the first subframe length bit is 1

Definition at line 196 of file wmaprodec.c.

Referenced by decode_init(), and decode_subframe_length().

◆ min_samples_per_subframe

uint16_t WMAProDecodeCtx::min_samples_per_subframe

Definition at line 197 of file wmaprodec.c.

Referenced by decode_init(), decode_subframe_length(), and decode_tilehdr().

◆ num_sfb

int8_t WMAProDecodeCtx::num_sfb[WMAPRO_BLOCK_SIZES]

scale factor bands per block size

Definition at line 198 of file wmaprodec.c.

Referenced by decode_init(), and decode_subframe().

◆ sfb_offsets

int16_t WMAProDecodeCtx::sfb_offsets[WMAPRO_BLOCK_SIZES][MAX_BANDS]

scale factor band offsets (multiples of 4)

Definition at line 199 of file wmaprodec.c.

Referenced by decode_init(), and decode_subframe().

◆ sf_offsets

int8_t WMAProDecodeCtx::sf_offsets[WMAPRO_BLOCK_SIZES][WMAPRO_BLOCK_SIZES][MAX_BANDS]

scale factor resample matrix

Definition at line 200 of file wmaprodec.c.

Referenced by decode_init(), and decode_scale_factors().

◆ subwoofer_cutoffs

int16_t WMAProDecodeCtx::subwoofer_cutoffs[WMAPRO_BLOCK_SIZES]

subwoofer cutoff values

Definition at line 201 of file wmaprodec.c.

Referenced by decode_init(), and decode_subframe().

◆ pgb

GetBitContext WMAProDecodeCtx::pgb

bitstream reader context for the packet

Definition at line 204 of file wmaprodec.c.

Referenced by decode_packet().

◆ next_packet_start

int WMAProDecodeCtx::next_packet_start

start offset of the next wma packet in the demuxer packet

Definition at line 205 of file wmaprodec.c.

Referenced by decode_packet().

◆ packet_offset

uint8_t WMAProDecodeCtx::packet_offset

frame offset in the packet

Definition at line 206 of file wmaprodec.c.

Referenced by decode_packet().

◆ packet_sequence_number

uint8_t WMAProDecodeCtx::packet_sequence_number

current packet number

Definition at line 207 of file wmaprodec.c.

Referenced by decode_packet().

◆ num_saved_bits

int WMAProDecodeCtx::num_saved_bits

saved number of bits

Definition at line 208 of file wmaprodec.c.

Referenced by decode_frame(), decode_packet(), decode_subframe(), and save_bits().

◆ frame_offset

int WMAProDecodeCtx::frame_offset

frame offset in the bit reservoir

Definition at line 209 of file wmaprodec.c.

Referenced by decode_frame(), decode_packet(), and save_bits().

◆ subframe_offset

int WMAProDecodeCtx::subframe_offset

subframe offset in the bit reservoir

Definition at line 210 of file wmaprodec.c.

Referenced by decode_subframe().

◆ packet_loss

uint8_t WMAProDecodeCtx::packet_loss

set in case of bitstream error

Definition at line 211 of file wmaprodec.c.

Referenced by decode_frame(), decode_init(), decode_packet(), flush(), save_bits(), wmapro_decode_packet(), and xma_decode_packet().

◆ packet_done

uint8_t WMAProDecodeCtx::packet_done

set when a packet is fully decoded

Definition at line 212 of file wmaprodec.c.

Referenced by decode_packet(), and xma_decode_packet().

◆ frame_num

uint32_t WMAProDecodeCtx::frame_num

current frame number (not used for decoding)

Definition at line 215 of file wmaprodec.c.

Referenced by decode_frame(), and decode_tilehdr().

◆ gb

GetBitContext WMAProDecodeCtx::gb

bitstream reader context

Definition at line 216 of file wmaprodec.c.

Referenced by decode_channel_transform(), decode_coeffs(), decode_decorrelation_matrix(), decode_frame(), decode_packet(), decode_scale_factors(), decode_subframe(), decode_subframe_length(), decode_tilehdr(), and save_bits().

◆ buf_bit_size

int WMAProDecodeCtx::buf_bit_size

buffer size in bits

Definition at line 217 of file wmaprodec.c.

Referenced by decode_packet(), and remaining_bits().

◆ drc_gain

uint8_t WMAProDecodeCtx::drc_gain

gain for the DRC tool

Definition at line 218 of file wmaprodec.c.

Referenced by decode_frame().

◆ skip_frame

int8_t WMAProDecodeCtx::skip_frame

skip output step

Definition at line 219 of file wmaprodec.c.

Referenced by decode_frame(), and decode_init().

◆ parsed_all_subframes

int8_t WMAProDecodeCtx::parsed_all_subframes

all subframes decoded?

Definition at line 220 of file wmaprodec.c.

Referenced by decode_frame(), and decode_subframe().

◆ skip_packets

uint8_t WMAProDecodeCtx::skip_packets

packets to skip to find next packet in a stream (XMA1/2)

Definition at line 221 of file wmaprodec.c.

Referenced by decode_packet(), flush(), and xma_decode_packet().

◆ subframe_len

int16_t WMAProDecodeCtx::subframe_len

current subframe length

Definition at line 224 of file wmaprodec.c.

Referenced by decode_coeffs(), decode_subframe(), inverse_channel_transform(), and wmapro_window().

◆ nb_channels

int8_t WMAProDecodeCtx::nb_channels

number of channels in stream (XMA1/2)

Definition at line 225 of file wmaprodec.c.

Referenced by decode_channel_transform(), decode_decorrelation_matrix(), decode_frame(), decode_init(), decode_subframe(), decode_tilehdr(), dump_context(), flush(), inverse_channel_transform(), xma_decode_init(), and xma_decode_packet().

◆ channels_for_cur_subframe

int8_t WMAProDecodeCtx::channels_for_cur_subframe

number of channels that contain the subframe

Definition at line 226 of file wmaprodec.c.

Referenced by decode_channel_transform(), decode_scale_factors(), decode_subframe(), and wmapro_window().

◆ channel_indexes_for_cur_subframe

int8_t WMAProDecodeCtx::channel_indexes_for_cur_subframe[WMAPRO_MAX_CHANNELS]

Definition at line 227 of file wmaprodec.c.

Referenced by decode_channel_transform(), decode_scale_factors(), decode_subframe(), and wmapro_window().

◆ num_bands

int8_t WMAProDecodeCtx::num_bands

number of scale factor bands

Definition at line 228 of file wmaprodec.c.

Referenced by decode_channel_transform(), decode_scale_factors(), decode_subframe(), and inverse_channel_transform().

◆ transmit_num_vec_coeffs

int8_t WMAProDecodeCtx::transmit_num_vec_coeffs

number of vector coded coefficients is part of the bitstream

Definition at line 229 of file wmaprodec.c.

Referenced by decode_coeffs(), and decode_subframe().

◆ cur_sfb_offsets

int16_t* WMAProDecodeCtx::cur_sfb_offsets

sfb offsets for the current block

Definition at line 230 of file wmaprodec.c.

Referenced by decode_subframe(), and inverse_channel_transform().

◆ table_idx

uint8_t WMAProDecodeCtx::table_idx

index for the num_sfb, sfb_offsets, sf_offsets and subwoofer_cutoffs tables

Definition at line 231 of file wmaprodec.c.

Referenced by decode_scale_factors(), and decode_subframe().

◆ esc_len

int8_t WMAProDecodeCtx::esc_len

length of escaped coefficients

Definition at line 232 of file wmaprodec.c.

Referenced by decode_coeffs(), and decode_subframe().

◆ num_chgroups

uint8_t WMAProDecodeCtx::num_chgroups

number of channel groups

Definition at line 234 of file wmaprodec.c.

Referenced by decode_channel_transform(), and inverse_channel_transform().

◆ chgroup

WMAProChannelGrp WMAProDecodeCtx::chgroup[WMAPRO_MAX_CHANNELS]

channel group information

Definition at line 235 of file wmaprodec.c.

Referenced by decode_channel_transform(), and inverse_channel_transform().

◆ channel

WMAProChannelCtx WMAProDecodeCtx::channel[WMAPRO_MAX_CHANNELS]

per channel data

Definition at line 237 of file wmaprodec.c.

Referenced by decode_channel_transform(), decode_coeffs(), decode_frame(), decode_init(), decode_scale_factors(), decode_subframe(), decode_tilehdr(), flush(), and wmapro_window().

The documentation for this struct was generated from the following file:

libavcodec/wmaprodec.c

Data Fields

Detailed Description

Field Documentation

◆ avctx

◆ fdsp

◆ frame_data

◆ pb

◆ mdct_ctx

◆ tmp

◆ windows

◆ decode_flags

◆ len_prefix

◆ dynamic_range_compression

◆ bits_per_sample

◆ samples_per_frame

◆ log2_frame_size

◆ lfe_channel

◆ max_num_subframes

◆ subframe_len_bits

◆ max_subframe_len_bit

◆ min_samples_per_subframe

◆ num_sfb

◆ sfb_offsets

◆ sf_offsets

◆ subwoofer_cutoffs

◆ pgb

◆ next_packet_start

◆ packet_offset

◆ packet_sequence_number

◆ num_saved_bits

◆ frame_offset

◆ subframe_offset

◆ packet_loss

◆ packet_done

◆ frame_num

◆ gb

◆ buf_bit_size

◆ drc_gain

◆ skip_frame

◆ parsed_all_subframes

◆ skip_packets

◆ subframe_len

◆ nb_channels

◆ channels_for_cur_subframe

◆ channel_indexes_for_cur_subframe

◆ num_bands

◆ transmit_num_vec_coeffs

◆ cur_sfb_offsets

◆ table_idx

◆ esc_len

◆ num_chgroups

◆ chgroup

◆ channel