diff options
Diffstat (limited to 'libSBRenc/src/tran_det.h')
| -rw-r--r-- | libSBRenc/src/tran_det.h | 61 |
1 files changed, 57 insertions, 4 deletions
diff --git a/libSBRenc/src/tran_det.h b/libSBRenc/src/tran_det.h index 95b5d2e..6fe1023 100644 --- a/libSBRenc/src/tran_det.h +++ b/libSBRenc/src/tran_det.h @@ -2,7 +2,7 @@ /* ----------------------------------------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. +© Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. All rights reserved. 1. INTRODUCTION @@ -96,7 +96,8 @@ typedef struct FIXP_DBL transients[QMF_MAX_TIME_SLOTS+(QMF_MAX_TIME_SLOTS/2)]; FIXP_DBL thresholds[QMF_CHANNELS]; FIXP_DBL tran_thr; /* Master threshold for transient signals */ - FIXP_DBL split_thr; /* Threshold for splitting FIXFIX-frames into 2 env */ + FIXP_DBL split_thr_m; /* Threshold for splitting FIXFIX-frames into 2 env */ + INT split_thr_e; /* Scale for splitting threshold */ FIXP_DBL prevLowBandEnergy; /* Energy of low band */ FIXP_DBL prevHighBandEnergy; /* Energy of high band */ INT tran_fc; /* Number of lowband subbands to discard */ @@ -112,6 +113,57 @@ SBR_TRANSIENT_DETECTOR; typedef SBR_TRANSIENT_DETECTOR *HANDLE_SBR_TRANSIENT_DETECTOR; +#define TRAN_DET_LOOKAHEAD 2 +#define TRAN_DET_START_FREQ 4500 /*start frequency for transient detection*/ +#define TRAN_DET_STOP_FREQ 13500 /*stop frequency for transient detection*/ +#define TRAN_DET_MIN_QMFBANDS 4 /* minimum qmf bands for transient detection */ +#define QMF_HP_dBd_SLOPE_FIX FL2FXCONST_DBL(0.00075275f) /* 0.002266f/10 * log2(10) */ +#define TRAN_DET_THRSHLD FL2FXCONST_DBL(3.2f/4.f) +#define TRAN_DET_THRSHLD_SCALE (2) + +typedef struct +{ + INT transientCandidates[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; + INT nTimeSlots; + INT lookahead; + INT startBand; + INT stopBand; + + FIXP_DBL dBf_m[QMF_CHANNELS]; + INT dBf_e[QMF_CHANNELS]; + + FIXP_DBL energy_timeSlots[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; + INT energy_timeSlots_scale[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; + + FIXP_DBL delta_energy[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; + INT delta_energy_scale[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; + + FIXP_DBL lowpass_energy[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; + INT lowpass_energy_scale[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; +#if defined (FTD_LOG) + FDKFILE *ftd_log; +#endif +} +FAST_TRAN_DETECTOR; +typedef FAST_TRAN_DETECTOR *HANDLE_FAST_TRAN_DET; + + +INT FDKsbrEnc_InitSbrFastTransientDetector( + HANDLE_FAST_TRAN_DET h_sbrFastTransientDetector, + const INT time_slots_per_frame, + const INT bandwidth_qmf_slot, + const INT no_qmf_channels, + const INT sbr_qmf_1st_band + ); + +void FDKsbrEnc_fastTransientDetect( + const HANDLE_FAST_TRAN_DET h_sbrFastTransientDetector, + const FIXP_DBL *const *Energies, + const int *const scaleEnergies, + const INT YBufferWriteOffset, + UCHAR *const tran_vector + ); + void FDKsbrEnc_transientDetect(HANDLE_SBR_TRANSIENT_DETECTOR h_sbrTransientDetector, FIXP_DBL **Energies, @@ -124,6 +176,7 @@ FDKsbrEnc_transientDetect(HANDLE_SBR_TRANSIENT_DETECTOR h_sbrTransientDetector, int FDKsbrEnc_InitSbrTransientDetector (HANDLE_SBR_TRANSIENT_DETECTOR h_sbrTransientDetector, + UINT sbrSyntaxFlags, /* SBR syntax flags derived from AOT. */ INT frameSize, INT sampleFreq, sbrConfigurationPtr params, @@ -145,6 +198,6 @@ FDKsbrEnc_frameSplitter(FIXP_DBL **Energies, int YBufferSzShift, int nSfb, int timeStep, - int no_cols); - + int no_cols, + FIXP_DBL* tonality); #endif |