#include "libavutil/attributes.h"
#include "avcodec.h"
#include "internal.h"
#include "sinewin.h"
#include "wma.h"
#include "wma_common.h"
#include "wma_freqs.h"
#include "wmadata.h"

Functions
static av_cold int	init_coef_vlc (VLC vlc, uint16_t prun_table, float plevel_table, uint16_t pint_table, const CoefVLCTable vlc_table)

av_cold int	ff_wma_init (AVCodecContext *avctx, int flags2)

int	ff_wma_total_gain_to_bits (int total_gain)

int	ff_wma_end (AVCodecContext *avctx)

unsigned int	ff_wma_get_large_val (GetBitContext *gb)
	Decode an uncompressed coefficient. More...

int	ff_wma_run_level_decode (AVCodecContext avctx, GetBitContext gb, VLC vlc, const float level_table, const uint16_t run_table, int version, WMACoef ptr, int offset, int num_coefs, int block_len, int frame_len_bits, int coef_nb_bits)
	Decode run level compressed coefficients. More...

Function Documentation

◆ init_coef_vlc()

static av_cold int init_coef_vlc	(	VLC *	vlc,
		uint16_t **	prun_table,
		float **	plevel_table,
		uint16_t **	pint_table,
		const CoefVLCTable *	vlc_table
	)

static

Definition at line 34 of file wma.c.

◆ ff_wma_init()

av_cold int ff_wma_init	(	AVCodecContext *	avctx,
		int	flags2
	)

Definition at line 79 of file wma.c.

Referenced by encode_init(), and wma_decode_init().

◆ ff_wma_total_gain_to_bits()

int ff_wma_total_gain_to_bits ( int total_gain )

Definition at line 352 of file wma.c.

Referenced by encode_block(), and wma_decode_block().

◆ ff_wma_end()

int ff_wma_end ( AVCodecContext * avctx )

Definition at line 366 of file wma.c.

◆ ff_wma_get_large_val()

unsigned int ff_wma_get_large_val ( GetBitContext * gb )

Decode an uncompressed coefficient.

Parameters

gb	GetBitContext

Returns: the decoded coefficient

consumes up to 34 bits

decode length

Definition at line 394 of file wma.c.

Referenced by decode_coeffs(), and ff_wma_run_level_decode().

◆ ff_wma_run_level_decode()

int ff_wma_run_level_decode	(	AVCodecContext *	avctx,
		GetBitContext *	gb,
		VLC *	vlc,
		const float *	level_table,
		const uint16_t *	run_table,
		int	version,
		WMACoef *	ptr,
		int	offset,
		int	num_coefs,
		int	block_len,
		int	frame_len_bits,
		int	coef_nb_bits
	)

Decode run level compressed coefficients.

Parameters

avctx	codec context
gb	bitstream reader context
vlc	vlc table for get_vlc2
level_table	level codes
run_table	run codes
version	0 for wma1,2 1 for wmapro
ptr	output buffer
offset	offset in the output buffer
num_coefs	number of input coefficients
block_len	input buffer length (2^n)
frame_len_bits	number of bits for escaped run codes
coef_nb_bits	number of bits for escaped level codes

Returns: 0 on success, -1 otherwise

normal code

EOB

escape

NOTE: this is rather suboptimal. reading block_len_bits would be better

escape decode

NOTE: EOB can be omitted

Definition at line 426 of file wma.c.

Referenced by decode_coeffs(), and wma_decode_block().