adx.c File Reference
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "adx.h"
Include dependency graph for adx.c:

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Functions

void ff_adx_calculate_coeffs (int cutoff, int sample_rate, int bits, int *coeff)
 Calculate LPC coefficients based on cutoff frequency and sample rate. More...
 
int avpriv_adx_decode_header (AVCodecContext *avctx, const uint8_t *buf, int bufsize, int *header_size, int *coeff)
 Decode ADX stream header. More...
 

Function Documentation

int avpriv_adx_decode_header ( AVCodecContext avctx,
const uint8_t buf,
int  bufsize,
int *  header_size,
int *  coeff 
)

Decode ADX stream header.

Sets avctx->channels and avctx->sample_rate.

Parameters
avctxcodec context
bufheader data
bufsizedata size, should be at least 24 bytes
[out]header_sizesize of ADX header
[out]coeff2 LPC coefficients, can be NULL
Returns
data offset or negative error code if header is invalid

Definition at line 38 of file adx.c.

Referenced by adx_decode_frame(), adx_decode_init(), and adx_read_header().

void ff_adx_calculate_coeffs ( int  cutoff,
int  sample_rate,
int  bits,
int *  coeff 
)

Calculate LPC coefficients based on cutoff frequency and sample rate.

Parameters
cutoffcutoff frequency
sample_ratesample rate
bitsnumber of bits used to quantize coefficients
[out]coeff2 quantized LPC coefficients

Definition at line 26 of file adx.c.

Referenced by adx_encode_init(), and avpriv_adx_decode_header().