aacdec_dsp_template.c File Reference

#include "aacdec.h"
#include "libavcodec/lpc_functions.h"
#include "libavcodec/aactab.h"

Go to the source code of this file.

Functions
static void AAC_RENAME()	dequant_scalefactors (SingleChannelElement *sce)
	Convert integer scalefactors to the decoder's native expected scalefactor values. More...
static void AAC_RENAME()	apply_mid_side_stereo (AACDecContext *ac, ChannelElement *cpe)
	Mid/Side stereo decoding; reference: 4.6.8.1.3. More...
static void AAC_RENAME()	apply_intensity_stereo (AACDecContext *ac, ChannelElement *cpe, int ms_present)
	intensity stereo decoding; reference: 4.6.8.2.3 More...
static void AAC_RENAME()	apply_tns (void *_coef_param, TemporalNoiseShaping *tns, IndividualChannelStream *ics, int decode)
	Decode Temporal Noise Shaping filter coefficients and apply all-pole filters; reference: 4.6.9.3. More...
static void AAC_RENAME()	windowing_and_mdct_ltp (AACDecContext *ac, INTFLOAT *out, INTFLOAT *in, IndividualChannelStream *ics)
	Apply windowing and MDCT to obtain the spectral coefficient from the predicted sample by LTP. More...
static void AAC_RENAME()	apply_ltp (AACDecContext *ac, SingleChannelElement *sce)
	Apply the long term prediction. More...
static void AAC_RENAME()	update_ltp (AACDecContext *ac, SingleChannelElement *sce)
	Update the LTP buffer for next frame. More...
static void AAC_RENAME()	imdct_and_windowing (AACDecContext *ac, SingleChannelElement *sce)
	Conduct IMDCT and windowing. More...
static void AAC_RENAME()	imdct_and_windowing_960 (AACDecContext *ac, SingleChannelElement *sce)
	Conduct IMDCT and windowing. More...
static void AAC_RENAME()	imdct_and_windowing_ld (AACDecContext *ac, SingleChannelElement *sce)
static void AAC_RENAME()	imdct_and_windowing_eld (AACDecContext *ac, SingleChannelElement *sce)
static void AAC_RENAME()	clip_output (AACDecContext *ac, ChannelElement *che, int type, int samples)
static void	reset_all_predictors (PredictorState *ps)
static void	reset_predictor_group (PredictorState *ps, int group_num)
static void AAC_RENAME()	apply_prediction (AACDecContext *ac, SingleChannelElement *sce)
	Apply AAC-Main style frequency domain prediction. More...
const AACDecDSP	AAC_RENAME (aac_dsp)

Function Documentation

dequant_scalefactors()

static void AAC_RENAME() dequant_scalefactors ( SingleChannelElement *  sce )

static

Convert integer scalefactors to the decoder's native expected scalefactor values.

Definition at line 41 of file aacdec_dsp_template.c.

apply_mid_side_stereo()

static void AAC_RENAME() apply_mid_side_stereo ( AACDecContext *  ac, ChannelElement *  cpe  )

static

Mid/Side stereo decoding; reference: 4.6.8.1.3.

Definition at line 94 of file aacdec_dsp_template.c.

apply_intensity_stereo()

static void AAC_RENAME() apply_intensity_stereo ( AACDecContext *  ac, ChannelElement *  cpe, int  ms_present  )

static

intensity stereo decoding; reference: 4.6.8.2.3

Parameters

ms_present

Indicates mid/side stereo presence. [0] mask is all 0s; [1] mask is decoded from bitstream; [2] mask is all 1s; [3] reserved for scalable AAC

Definition at line 132 of file aacdec_dsp_template.c.

apply_tns()

static void AAC_RENAME() apply_tns ( void *  _coef_param, TemporalNoiseShaping *  tns, IndividualChannelStream *  ics, int  decode  )

static

Decode Temporal Noise Shaping filter coefficients and apply all-pole filters; reference: 4.6.9.3.

Parameters

decode	1 if tool is used normally, 0 if tool is used in LTP.
coef	spectral coefficients

Definition at line 183 of file aacdec_dsp_template.c.

Referenced by apply_ltp().

windowing_and_mdct_ltp()

static void AAC_RENAME() windowing_and_mdct_ltp ( AACDecContext *  ac, INTFLOAT *  out, INTFLOAT *  in, IndividualChannelStream *  ics  )

inlinestatic

Apply windowing and MDCT to obtain the spectral coefficient from the predicted sample by LTP.

Definition at line 244 of file aacdec_dsp_template.c.

Referenced by apply_ltp().

apply_ltp()

static void AAC_RENAME() apply_ltp ( AACDecContext *  ac, SingleChannelElement *  sce  )

static

Apply the long term prediction.

Definition at line 271 of file aacdec_dsp_template.c.

update_ltp()

static void AAC_RENAME() update_ltp ( AACDecContext *  ac, SingleChannelElement *  sce  )

static

Update the LTP buffer for next frame.

Definition at line 303 of file aacdec_dsp_template.c.

imdct_and_windowing()

static void AAC_RENAME() imdct_and_windowing ( AACDecContext *  ac, SingleChannelElement *  sce  )

static

Conduct IMDCT and windowing.

Definition at line 344 of file aacdec_dsp_template.c.

imdct_and_windowing_960()

static void AAC_RENAME() imdct_and_windowing_960 ( AACDecContext *  ac, SingleChannelElement *  sce  )

static

Conduct IMDCT and windowing.

Definition at line 408 of file aacdec_dsp_template.c.

imdct_and_windowing_ld()

static void AAC_RENAME() imdct_and_windowing_ld ( AACDecContext *  ac, SingleChannelElement *  sce  )

static

Definition at line 469 of file aacdec_dsp_template.c.

imdct_and_windowing_eld()

static void AAC_RENAME() imdct_and_windowing_eld ( AACDecContext *  ac, SingleChannelElement *  sce  )

static

Definition at line 494 of file aacdec_dsp_template.c.

clip_output()

static void AAC_RENAME() clip_output ( AACDecContext *  ac, ChannelElement *  che, int  type, int  samples  )

static

Definition at line 557 of file aacdec_dsp_template.c.

reset_all_predictors()

static void reset_all_predictors ( PredictorState *  ps )

inlinestatic

Definition at line 572 of file aacdec_dsp_template.c.

Referenced by apply_prediction().

reset_predictor_group()

static void reset_predictor_group ( PredictorState *  ps, int  group_num  )

inlinestatic

Definition at line 579 of file aacdec_dsp_template.c.

Referenced by apply_prediction().

apply_prediction()

static void AAC_RENAME() apply_prediction ( AACDecContext *  ac, SingleChannelElement *  sce  )

static

Apply AAC-Main style frequency domain prediction.

Definition at line 589 of file aacdec_dsp_template.c.

AAC_RENAME()

const AACDecDSP AAC_RENAME

(

aac_dsp

)

Referenced by apply_ltp(), imdct_and_windowing_960(), and imdct_and_windowing_eld().