WMAProChannelCtx Struct Reference

frame specific decoder context for a single channel More...

Data Fields
int16_t	prev_block_len
	length of the previous block
uint8_t	transmit_coefs
uint8_t	num_subframes
uint16_t	subframe_len [MAX_SUBFRAMES]
	subframe length in samples
uint16_t	subframe_offset [MAX_SUBFRAMES]
	subframe positions in the current frame
uint8_t	cur_subframe
	current subframe number
uint16_t	decoded_samples
	number of already processed samples
uint8_t	grouped
	channel is part of a group
int	quant_step
	quantization step for the current subframe
int8_t	reuse_sf
	share scale factors between subframes
int8_t	scale_factor_step
	scaling step for the current subframe
int	max_scale_factor
	maximum scale factor for the current subframe
int	saved_scale_factors [2][MAX_BANDS]
	resampled and (previously) transmitted scale factor values
int8_t	scale_factor_idx
	index for the transmitted scale factor values (used for resampling)
int *	scale_factors
	pointer to the scale factor values used for decoding
uint8_t	table_idx
	index in sf_offsets for the scale factor reference block
float *	coeffs
	pointer to the subframe decode buffer
float	out [WMAPRO_BLOCK_MAX_SIZE+WMAPRO_BLOCK_MAX_SIZE/2]
	output buffer

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Detailed Description

frame specific decoder context for a single channel

Definition at line 127 of file wmaprodec.c.

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Field Documentation

float* WMAProChannelCtx::coeffs

pointer to the subframe decode buffer

Definition at line 144 of file wmaprodec.c.

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

uint8_t WMAProChannelCtx::cur_subframe

current subframe number

Definition at line 133 of file wmaprodec.c.

Referenced by decode_frame(), decode_scale_factors(), and decode_subframe().

uint16_t WMAProChannelCtx::decoded_samples

number of already processed samples

Definition at line 134 of file wmaprodec.c.

Referenced by decode_frame(), and decode_subframe().

uint8_t WMAProChannelCtx::grouped

channel is part of a group

Definition at line 135 of file wmaprodec.c.

Referenced by decode_channel_transform(), and decode_subframe().

int WMAProChannelCtx::max_scale_factor

maximum scale factor for the current subframe

Definition at line 139 of file wmaprodec.c.

Referenced by decode_scale_factors(), and decode_subframe().

uint8_t WMAProChannelCtx::num_subframes

Definition at line 130 of file wmaprodec.c.

Referenced by decode_subframe(), and decode_tilehdr().

float WMAProChannelCtx::out[WMAPRO_BLOCK_MAX_SIZE+WMAPRO_BLOCK_MAX_SIZE/2]

output buffer

Definition at line 145 of file wmaprodec.c.

Referenced by decode_frame(), decode_subframe(), and flush().

int16_t WMAProChannelCtx::prev_block_len

length of the previous block

Definition at line 128 of file wmaprodec.c.

Referenced by decode_init(), and wmapro_window().

int WMAProChannelCtx::quant_step

quantization step for the current subframe

Definition at line 136 of file wmaprodec.c.

Referenced by decode_subframe().

int8_t WMAProChannelCtx::reuse_sf

share scale factors between subframes

Definition at line 137 of file wmaprodec.c.

Referenced by decode_frame(), and decode_scale_factors().

int WMAProChannelCtx::saved_scale_factors[2][MAX_BANDS]

resampled and (previously) transmitted scale factor values

Definition at line 140 of file wmaprodec.c.

Referenced by decode_scale_factors().

int8_t WMAProChannelCtx::scale_factor_idx

index for the transmitted scale factor values (used for resampling)

Definition at line 141 of file wmaprodec.c.

Referenced by decode_scale_factors().

int8_t WMAProChannelCtx::scale_factor_step

scaling step for the current subframe

Definition at line 138 of file wmaprodec.c.

Referenced by decode_scale_factors(), and decode_subframe().

int* WMAProChannelCtx::scale_factors

pointer to the scale factor values used for decoding

Definition at line 142 of file wmaprodec.c.

Referenced by decode_scale_factors(), and decode_subframe().

uint16_t WMAProChannelCtx::subframe_len[MAX_SUBFRAMES]

subframe length in samples

Definition at line 131 of file wmaprodec.c.

Referenced by decode_subframe(), and decode_tilehdr().

uint16_t WMAProChannelCtx::subframe_offset[MAX_SUBFRAMES]

subframe positions in the current frame

Definition at line 132 of file wmaprodec.c.

Referenced by decode_tilehdr().

uint8_t WMAProChannelCtx::table_idx

index in sf_offsets for the scale factor reference block

Definition at line 143 of file wmaprodec.c.

Referenced by decode_scale_factors().

uint8_t WMAProChannelCtx::transmit_coefs

Definition at line 129 of file wmaprodec.c.

Referenced by decode_subframe().

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

• libavcodec/wmaprodec.c