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aacdec: add a decoder DSP structure 

To be used to abstract away DSP functions.
This commit is contained in:
Lynne 2024-03-13 06:35:38 +01:00
parent 9de66fd449
commit ed009bfd3d
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GPG Key ID: A2FEA5F03F034464
1 changed files with 29 additions and 2 deletions
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31
libavcodec/aacdec.h
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@ -41,6 +41,8 @@
#include "aac.h"
#include "mpeg4audio.h"
typedef struct AACDecContext AACDecContext;
/**
* Output configuration status
*/
@ -197,12 +199,37 @@ typedef struct DynamicRangeControl {
*/
} DynamicRangeControl;
/**
* DSP-specific primitives
*/
typedef struct AACDecDSP {
void (*dequant_scalefactors)(SingleChannelElement *sce);
void (*apply_mid_side_stereo)(AACDecContext *ac, ChannelElement *cpe);
void (*apply_intensity_stereo)(AACDecContext *ac, ChannelElement *cpe,
int ms_present);
void (*apply_tns)(void *_coef_param, TemporalNoiseShaping *tns,
IndividualChannelStream *ics, int decode);
void (*apply_ltp)(AACDecContext *ac, SingleChannelElement *sce);
void (*update_ltp)(AACDecContext *ac, SingleChannelElement *sce);
void (*imdct_and_windowing)(AACDecContext *ac, SingleChannelElement *sce);
void (*imdct_and_windowing_960)(AACDecContext *ac, SingleChannelElement *sce);
void (*imdct_and_windowing_ld)(AACDecContext *ac, SingleChannelElement *sce);
void (*imdct_and_windowing_eld)(AACDecContext *ac, SingleChannelElement *sce);
} AACDecDSP;
/**
* main AAC decoding context
*/
typedef struct AACDecContext {
struct AACDecContext {
const struct AVClass *class;
struct AVCodecContext *avctx;
AACDecDSP dsp;
struct AVFrame *frame;
int is_saved; ///< Set if elements have stored overlap from previous frame.
@ -298,7 +325,7 @@ typedef struct AACDecContext {
void (*update_ltp)(struct AACDecContext *ac, SingleChannelElement *sce);
void (*vector_pow43)(int *coefs, int len);
void (*subband_scale)(int *dst, int *src, int scale, int offset, int len, void *log_context);
} AACDecContext;
};
#if defined(USE_FIXED) && USE_FIXED
#define fdsp RENAME_FIXED(fdsp)