FFmpeg: APEContext Struct Reference

Decoder context. More...

Data Fields
AVClass *	class
	class for AVOptions

AVCodecContext *	avctx

BswapDSPContext	bdsp

LLAudDSPContext	adsp

int	channels

int	samples
	samples left to decode in current frame

int	bps

int	fileversion
	codec version, very important in decoding process

int	compression_level
	compression levels

int	fset
	which filter set to use (calculated from compression level)

int	flags
	global decoder flags

uint32_t	CRC
	frame CRC

int	frameflags
	frame flags

APEPredictor	predictor
	predictor used for final reconstruction

int32_t *	decoded_buffer

int	decoded_size

int32_t *	decoded [MAX_CHANNELS]
	decoded data for each channel

int	blocks_per_loop
	maximum number of samples to decode for each call

int16_t *	filterbuf [APE_FILTER_LEVELS]
	filter memory

APERangecoder	rc
	rangecoder used to decode actual values

APERice	riceX
	rice code parameters for the second channel

APERice	riceY
	rice code parameters for the first channel

APEFilter	filters [APE_FILTER_LEVELS][2]
	filters used for reconstruction

GetBitContext	gb

uint8_t *	data
	current frame data

uint8_t *	data_end
	frame data end

int	data_size
	frame data allocated size

const uint8_t *	ptr
	current position in frame data

int	error

void(*	entropy_decode_mono )(struct APEContext *ctx, int blockstodecode)

void(*	entropy_decode_stereo )(struct APEContext *ctx, int blockstodecode)

void(*	predictor_decode_mono )(struct APEContext *ctx, int count)

void(*	predictor_decode_stereo )(struct APEContext *ctx, int count)

uint32_t	junklength

uint32_t	firstframe

uint32_t	totalsamples

int	currentframe

APEFrame *	frames

char	magic [4]

int16_t	fileversion

int16_t	padding1

uint32_t	descriptorlength

uint32_t	headerlength

uint32_t	seektablelength

uint32_t	wavheaderlength

uint32_t	audiodatalength

uint32_t	audiodatalength_high

uint32_t	wavtaillength

uint8_t	md5 [16]

uint16_t	compressiontype

uint16_t	formatflags

uint32_t	blocksperframe

uint32_t	finalframeblocks

uint32_t	totalframes

uint16_t	bps

uint16_t	channels

uint32_t	samplerate

uint32_t *	seektable

uint8_t *	bittable

Detailed Description

Decoder context.

Definition at line 136 of file apedec.c.

Field Documentation

AVClass* APEContext::class

class for AVOptions

Definition at line 137 of file apedec.c.

AVCodecContext* APEContext::avctx

Definition at line 138 of file apedec.c.

Referenced by ape_decode_init(), ape_decode_value_3860(), ape_decode_value_3900(), ape_unpack_mono(), and ape_unpack_stereo().

BswapDSPContext APEContext::bdsp

Definition at line 139 of file apedec.c.

Referenced by ape_decode_frame(), and ape_decode_init().

LLAudDSPContext APEContext::adsp

Definition at line 140 of file apedec.c.

Referenced by ape_decode_init(), and do_apply_filter().

int APEContext::channels

Definition at line 141 of file apedec.c.

Referenced by ape_decode_frame(), ape_decode_init(), ape_dumpinfo(), ape_read_header(), and ape_unpack_mono().

int APEContext::samples

samples left to decode in current frame

Definition at line 142 of file apedec.c.

Referenced by ape_decode_frame(), and ape_flush().

int APEContext::bps

Definition at line 143 of file apedec.c.

Referenced by ape_decode_frame(), ape_decode_init(), ape_dumpinfo(), and ape_read_header().

int APEContext::fileversion

codec version, very important in decoding process

Definition at line 145 of file apedec.c.

Referenced by ape_decode_frame(), ape_decode_init(), ape_decode_value_3860(), ape_decode_value_3900(), ape_dumpinfo(), ape_read_header(), apply_filter(), init_entropy_decoder(), init_predictor_decoder(), predictor_decode_mono_3800(), and predictor_decode_stereo_3800().

int APEContext::compression_level

compression levels

Definition at line 146 of file apedec.c.

Referenced by ape_decode_init(), init_predictor_decoder(), predictor_decode_mono_3800(), and predictor_decode_stereo_3800().

int APEContext::fset

which filter set to use (calculated from compression level)

Definition at line 147 of file apedec.c.

Referenced by ape_apply_filters(), ape_decode_init(), and init_frame_decoder().

int APEContext::flags

global decoder flags

Definition at line 148 of file apedec.c.

Referenced by ape_decode_init().

uint32_t APEContext::CRC

frame CRC

Definition at line 150 of file apedec.c.

Referenced by init_entropy_decoder().

int APEContext::frameflags

frame flags

Definition at line 151 of file apedec.c.

Referenced by ape_decode_frame(), ape_unpack_mono(), ape_unpack_stereo(), and init_entropy_decoder().

APEPredictor APEContext::predictor

predictor used for final reconstruction

Definition at line 152 of file apedec.c.

Referenced by init_predictor_decoder(), predictor_decode_mono_3800(), predictor_decode_mono_3930(), predictor_decode_mono_3950(), predictor_decode_stereo_3800(), predictor_decode_stereo_3930(), and predictor_decode_stereo_3950().

int32_t* APEContext::decoded_buffer

Definition at line 154 of file apedec.c.

Referenced by ape_decode_close(), and ape_decode_frame().

int APEContext::decoded_size

Definition at line 155 of file apedec.c.

Referenced by ape_decode_close(), and ape_decode_frame().

int32_t* APEContext::decoded[MAX_CHANNELS]

int APEContext::blocks_per_loop

maximum number of samples to decode for each call

Definition at line 157 of file apedec.c.

Referenced by ape_decode_frame().

int16_t* APEContext::filterbuf[APE_FILTER_LEVELS]

filter memory

Definition at line 159 of file apedec.c.

Referenced by ape_decode_close(), ape_decode_init(), and init_frame_decoder().

APERangecoder APEContext::rc

rangecoder used to decode actual values

Definition at line 161 of file apedec.c.

Referenced by range_dec_normalize(), range_decode_culfreq(), range_decode_culshift(), range_decode_update(), and range_start_decoding().

APERice APEContext::riceX

rice code parameters for the second channel

Definition at line 162 of file apedec.c.

Referenced by entropy_decode_stereo_0000(), entropy_decode_stereo_3860(), entropy_decode_stereo_3900(), entropy_decode_stereo_3930(), entropy_decode_stereo_3990(), and init_entropy_decoder().

APERice APEContext::riceY

rice code parameters for the first channel

Definition at line 163 of file apedec.c.

Referenced by entropy_decode_mono_0000(), entropy_decode_mono_3860(), entropy_decode_mono_3900(), entropy_decode_mono_3990(), entropy_decode_stereo_0000(), entropy_decode_stereo_3860(), entropy_decode_stereo_3900(), entropy_decode_stereo_3930(), entropy_decode_stereo_3990(), and init_entropy_decoder().

APEFilter APEContext::filters[APE_FILTER_LEVELS][2]

filters used for reconstruction

Definition at line 164 of file apedec.c.

Referenced by ape_apply_filters(), and init_frame_decoder().

GetBitContext APEContext::gb

Definition at line 165 of file apedec.c.

Referenced by ape_decode_frame(), decode_array_0000(), entropy_decode_mono_0000(), entropy_decode_mono_3860(), entropy_decode_stereo_0000(), entropy_decode_stereo_3860(), and init_entropy_decoder().

uint8_t* APEContext::data

current frame data

Definition at line 167 of file apedec.c.

Referenced by ape_decode_close(), and ape_decode_frame().

uint8_t* APEContext::data_end

frame data end

Definition at line 168 of file apedec.c.

Referenced by ape_decode_frame(), init_entropy_decoder(), and range_dec_normalize().

int APEContext::data_size

frame data allocated size

Definition at line 169 of file apedec.c.

Referenced by ape_decode_close(), and ape_decode_frame().

const uint8_t* APEContext::ptr

current position in frame data

Definition at line 170 of file apedec.c.

Referenced by ape_decode_frame(), entropy_decode_stereo_3900(), init_entropy_decoder(), range_dec_normalize(), and range_start_decoding().

int APEContext::error

Definition at line 172 of file apedec.c.

Referenced by ape_decode_frame(), range_dec_normalize(), and range_get_symbol().

void(* APEContext::entropy_decode_mono)(struct APEContext *ctx, int blockstodecode)

Definition at line 174 of file apedec.c.

Referenced by ape_decode_init(), and ape_unpack_mono().

void(* APEContext::entropy_decode_stereo)(struct APEContext *ctx, int blockstodecode)

Definition at line 175 of file apedec.c.

Referenced by ape_decode_init(), and ape_unpack_stereo().

void(* APEContext::predictor_decode_mono)(struct APEContext *ctx, int count)

Definition at line 176 of file apedec.c.

Referenced by ape_decode_init(), and ape_unpack_mono().

void(* APEContext::predictor_decode_stereo)(struct APEContext *ctx, int count)

Definition at line 177 of file apedec.c.

Referenced by ape_decode_init(), and ape_unpack_stereo().

uint32_t APEContext::junklength

Definition at line 53 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t APEContext::firstframe

Definition at line 54 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t APEContext::totalsamples

Definition at line 55 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

int APEContext::currentframe

Definition at line 56 of file ape.c.

Referenced by ape_read_header(), ape_read_packet(), and ape_read_seek().

APEFrame* APEContext::frames

Definition at line 57 of file ape.c.

Referenced by ape_dumpinfo(), ape_read_close(), ape_read_header(), and ape_read_packet().

char APEContext::magic[4]

Definition at line 60 of file ape.c.

Referenced by ape_dumpinfo().

int16_t APEContext::fileversion

Definition at line 61 of file ape.c.

int16_t APEContext::padding1

Definition at line 62 of file ape.c.

Referenced by ape_read_header().

uint32_t APEContext::descriptorlength

Definition at line 63 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t APEContext::headerlength

Definition at line 64 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t APEContext::seektablelength

Definition at line 65 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t APEContext::wavheaderlength

Definition at line 66 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t APEContext::audiodatalength

Definition at line 67 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t APEContext::audiodatalength_high

Definition at line 68 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t APEContext::wavtaillength

Definition at line 69 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint8_t APEContext::md5[16]

Definition at line 70 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint16_t APEContext::compressiontype

Definition at line 73 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint16_t APEContext::formatflags

Definition at line 74 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t APEContext::blocksperframe

Definition at line 75 of file ape.c.

Referenced by ape_dumpinfo(), ape_read_header(), and ape_read_packet().

uint32_t APEContext::finalframeblocks

Definition at line 76 of file ape.c.

Referenced by ape_dumpinfo(), ape_read_header(), and ape_read_packet().

uint32_t APEContext::totalframes

Definition at line 77 of file ape.c.

Referenced by ape_dumpinfo(), ape_read_header(), and ape_read_packet().

uint16_t APEContext::bps

Definition at line 78 of file ape.c.

uint16_t APEContext::channels

Definition at line 79 of file ape.c.

uint32_t APEContext::samplerate

Definition at line 80 of file ape.c.

Referenced by ape_dumpinfo(), and ape_read_header().

uint32_t* APEContext::seektable

Definition at line 83 of file ape.c.

Referenced by ape_dumpinfo(), ape_read_close(), and ape_read_header().

uint8_t* APEContext::bittable

Definition at line 84 of file ape.c.

Referenced by ape_dumpinfo(), ape_read_close(), and ape_read_header().

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

libavcodec/apedec.c
libavformat/ape.c