diff options
Diffstat (limited to 'libAACenc/src/block_switch.cpp')
| -rw-r--r-- | libAACenc/src/block_switch.cpp | 34 |
1 files changed, 11 insertions, 23 deletions
diff --git a/libAACenc/src/block_switch.cpp b/libAACenc/src/block_switch.cpp index 948c89f..7b3e275 100644 --- a/libAACenc/src/block_switch.cpp +++ b/libAACenc/src/block_switch.cpp @@ -83,7 +83,7 @@ amm-info@iis.fraunhofer.de /***************************** MPEG-4 AAC Encoder ************************** - Author(s): M. Werner + Author(s): M. Werner, Tobias Chalupka Description: Block switching ******************************************************************************/ @@ -100,9 +100,11 @@ amm-info@iis.fraunhofer.de static FIXP_DBL FDKaacEnc_GetWindowEnergy(const FIXP_DBL in[], const INT blSwWndIdx); -static void FDKaacEnc_CalcWindowEnergy( BLOCK_SWITCHING_CONTROL *RESTRICT blockSwitchingControl, - INT windowLen); - +static void FDKaacEnc_CalcWindowEnergy( + BLOCK_SWITCHING_CONTROL *RESTRICT blockSwitchingControl, + INT windowLen, + const INT_PCM *pTimeSignal + ); /****************** Constants *****************************/ /* LONG START SHORT STOP LOWOV */ @@ -145,20 +147,9 @@ static const FIXP_DBL minAttackNrg = (FL2FXCONST_DBL(1e+6f*NORM_PCM_ENERGY)>>BLO /**************** internal function prototypes ***********/ -static INT FDKaacEnc_GetWindowIndex(INT blockSwWindowIndex); - -static FIXP_DBL FDKaacEnc_GetWindowEnergy(const FIXP_DBL in[], const INT shortWndIdx); - -static void FDKaacEnc_CalcWindowEnergy( BLOCK_SWITCHING_CONTROL *RESTRICT blockSwitchingControl, - INT windowLen); - - - /****************** Routines ****************************/ void FDKaacEnc_InitBlockSwitching(BLOCK_SWITCHING_CONTROL *blockSwitchingControl, INT isLowDelay) { - /* note: the pointer to timeSignal can be zeroed here, because it is initialized for every call - to FDKaacEnc_BlockSwitching anew */ FDKmemclear (blockSwitchingControl, sizeof(BLOCK_SWITCHING_CONTROL)); if (isLowDelay) @@ -214,7 +205,7 @@ static const INT chgWndSqLkAhd[2][2][N_BLOCKTYPES] = /*attack */ {START_WINDOW, SHORT_WINDOW, SHORT_WINDOW, START_WINDOW, WRONG_WINDOW, WRONG_WINDOW} } /* attack */ }; -int FDKaacEnc_BlockSwitching(BLOCK_SWITCHING_CONTROL *blockSwitchingControl, const INT granuleLength, const int isLFE) +int FDKaacEnc_BlockSwitching(BLOCK_SWITCHING_CONTROL *blockSwitchingControl, const INT granuleLength, const int isLFE, const INT_PCM *pTimeSignal) { UINT i; FIXP_DBL enM1, enMax; @@ -263,7 +254,7 @@ int FDKaacEnc_BlockSwitching(BLOCK_SWITCHING_CONTROL *blockSwitchingControl, con /* Calculate unfiltered and filtered energies in subwindows and combine to segments */ - FDKaacEnc_CalcWindowEnergy(blockSwitchingControl, granuleLength>>(nBlockSwitchWindows==4? 2:3 )); + FDKaacEnc_CalcWindowEnergy(blockSwitchingControl, granuleLength>>(nBlockSwitchWindows==4? 2:3 ), pTimeSignal); /* now calculate if there is an attack */ @@ -335,8 +326,7 @@ static FIXP_DBL FDKaacEnc_GetWindowEnergy(const FIXP_DBL in[], const INT blSwWnd } - -static void FDKaacEnc_CalcWindowEnergy(BLOCK_SWITCHING_CONTROL *RESTRICT blockSwitchingControl, INT windowLen) +static void FDKaacEnc_CalcWindowEnergy(BLOCK_SWITCHING_CONTROL *RESTRICT blockSwitchingControl, INT windowLen, const INT_PCM *pTimeSignal) { INT i; UINT w; @@ -344,8 +334,6 @@ static void FDKaacEnc_CalcWindowEnergy(BLOCK_SWITCHING_CONTROL *RESTRICT blockSw FIXP_SGL hiPassCoeff0 = hiPassCoeff[0]; FIXP_SGL hiPassCoeff1 = hiPassCoeff[1]; - INT_PCM *timeSignal = blockSwitchingControl->timeSignal; - /* sum up scalarproduct of timesignal as windowed Energies */ for (w=0; w < blockSwitchingControl->nBlockSwitchWindows; w++) { @@ -361,9 +349,9 @@ static void FDKaacEnc_CalcWindowEnergy(BLOCK_SWITCHING_CONTROL *RESTRICT blockSw FIXP_DBL tempUnfiltered, tempFiltred, t1, t2; /* tempUnfiltered is scaled with 1 to prevent overflows during calculation of tempFiltred */ #if SAMPLE_BITS == DFRACT_BITS - tempUnfiltered = (FIXP_DBL) *timeSignal++ >> 1; + tempUnfiltered = (FIXP_DBL) *pTimeSignal++ >> 1; #else - tempUnfiltered = (FIXP_DBL) *timeSignal++ << (DFRACT_BITS-SAMPLE_BITS-1); + tempUnfiltered = (FIXP_DBL) *pTimeSignal++ << (DFRACT_BITS-SAMPLE_BITS-1); #endif t1 = fMultDiv2(hiPassCoeff1, tempUnfiltered-temp_iirState0); t2 = fMultDiv2(hiPassCoeff0, temp_iirState1); |