MrBesen/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

aacdec: add a decoder DSP structure

Browse Source 
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
No known key found for this signature in database
GPG Key ID: A2FEA5F03F034464
1 changed files with 29 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
libavcodec/aacdec.h
View File

@ -41,6 +41,8 @@
#include "aac.h" #include "aac.h"
#include "mpeg4audio.h" #include "mpeg4audio.h"
typedef struct AACDecContext AACDecContext;
/** /**
* Output configuration status * Output configuration status
*/ */
@ -197,12 +199,37 @@ typedef struct DynamicRangeControl {
*/ */
} 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 * main AAC decoding context
*/ */
typedef struct AACDecContext { struct AACDecContext {
const struct AVClass *class; const struct AVClass *class;
struct AVCodecContext *avctx; struct AVCodecContext *avctx;
AACDecDSP dsp;
struct AVFrame *frame; struct AVFrame *frame;
int is_saved; ///< Set if elements have stored overlap from previous 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 (*update_ltp)(struct AACDecContext *ac, SingleChannelElement *sce);
void (*vector_pow43)(int *coefs, int len); void (*vector_pow43)(int *coefs, int len);
void (*subband_scale)(int *dst, int *src, int scale, int offset, int len, void *log_context); void (*subband_scale)(int *dst, int *src, int scale, int offset, int len, void *log_context);
} AACDecContext; };
#if defined(USE_FIXED) && USE_FIXED #if defined(USE_FIXED) && USE_FIXED
#define fdsp RENAME_FIXED(fdsp) #define fdsp RENAME_FIXED(fdsp)