* @author Maxim Gavrilov ( maxim.gavrilov gmail com )
*/
-#ifndef FFMPEG_AAC_H
-#define FFMPEG_AAC_H
+#ifndef AVCODEC_AAC_H
+#define AVCODEC_AAC_H
#include "avcodec.h"
#include "dsputil.h"
#define MAX_ELEM_ID 16
#define TNS_MAX_ORDER 20
-#define PNS_MEAN_ENERGY 3719550720.0f // sqrt(3.0) * 1<<31
enum AudioObjectType {
AOT_NULL,
AFTER_IMDCT = 3,
};
+/**
+ * Predictor State
+ */
+typedef struct {
+ float cor0;
+ float cor1;
+ float var0;
+ float var1;
+ float r0;
+ float r1;
+} PredictorState;
+
+#define MAX_PREDICTORS 672
+
/**
* Individual Channel Stream
*/
int num_swb; ///< number of scalefactor window bands
int num_windows;
int tns_max_bands;
+ int predictor_present;
+ int predictor_initialized;
+ int predictor_reset_group;
+ uint8_t prediction_used[41];
+ PredictorState predictor_state[MAX_PREDICTORS];
} IndividualChannelStream;
+/**
+ * Temporal Noise Shaping
+ */
+typedef struct {
+ int present;
+ int n_filt[8];
+ int length[8][4];
+ int direction[8][4];
+ int order[8][4];
+ float coef[8][4][TNS_MAX_ORDER];
+} TemporalNoiseShaping;
+
/**
* Dynamic Range Control - decoded from the bitstream but not processed further.
*/
int num_coupled; ///< number of target elements
enum RawDataBlockType type[8]; ///< Type of channel element to be coupled - SCE or CPE.
int id_select[8]; ///< element id
- int ch_select[8]; /**< [0] shared list of gains; [1] list of gains for left channel;
- * [2] list of gains for right channel; [3] lists of gains for both channels
+ int ch_select[8]; /**< [0] shared list of gains; [1] list of gains for right channel;
+ * [2] list of gains for left channel; [3] lists of gains for both channels
*/
float gain[16][120];
} ChannelCoupling;
int band_type_run_end[120]; ///< band type run end points
float sf[120]; ///< scalefactors
DECLARE_ALIGNED_16(float, coeffs[1024]); ///< coefficients for IMDCT
- DECLARE_ALIGNED_16(float, saved[1024]); ///< overlap
+ DECLARE_ALIGNED_16(float, saved[512]); ///< overlap
DECLARE_ALIGNED_16(float, ret[1024]); ///< PCM output
} SingleChannelElement;
ChannelElement * che[4][MAX_ELEM_ID];
/** @} */
+ /**
+ * @defgroup temporary aligned temporary buffers (We do not want to have these on the stack.)
+ * @{
+ */
+ DECLARE_ALIGNED_16(float, buf_mdct[1024]);
+ /** @} */
+
/**
* @defgroup tables Computed / set up during initialization.
* @{
} AACContext;
-#endif /* FFMPEG_AAC_H */
+#endif /* AVCODEC_AAC_H */