diff options
Diffstat (limited to 'media/libstagefright/codecs/aacenc/src/transform.c')
| -rw-r--r-- | media/libstagefright/codecs/aacenc/src/transform.c | 160 |
1 files changed, 80 insertions, 80 deletions
diff --git a/media/libstagefright/codecs/aacenc/src/transform.c b/media/libstagefright/codecs/aacenc/src/transform.c index 4d11f78..a154a2f 100644 --- a/media/libstagefright/codecs/aacenc/src/transform.c +++ b/media/libstagefright/codecs/aacenc/src/transform.c @@ -31,7 +31,7 @@ #define swap2(p0,p1) \ t = p0; t1 = *(&(p0)+1); \ p0 = p1; *(&(p0)+1) = *(&(p1)+1); \ - p1 = t; *(&(p1)+1) = t1 + p1 = t; *(&(p1)+1) = t1 /********************************************************************************* * @@ -47,18 +47,18 @@ static void Shuffle(int *buf, int num, const unsigned char* bitTab) part0 = buf; part1 = buf + num; - + while ((i = *bitTab++) != 0) { j = *bitTab++; - swap2(part0[4*i+0], part0[4*j+0]); - swap2(part0[4*i+2], part1[4*j+0]); - swap2(part1[4*i+0], part0[4*j+2]); - swap2(part1[4*i+2], part1[4*j+2]); + swap2(part0[4*i+0], part0[4*j+0]); + swap2(part0[4*i+2], part1[4*j+0]); + swap2(part1[4*i+0], part0[4*j+2]); + swap2(part1[4*i+2], part1[4*j+2]); } do { - swap2(part0[4*i+2], part1[4*i+0]); + swap2(part0[4*i+2], part1[4*i+0]); } while ((i = *bitTab++) != 0); } @@ -74,8 +74,8 @@ static void Radix4First(int *buf, int num) { int r0, r1, r2, r3; int r4, r5, r6, r7; - - for (; num != 0; num--) + + for (; num != 0; num--) { r0 = buf[0] + buf[2]; r1 = buf[1] + buf[3]; @@ -113,7 +113,7 @@ static void Radix8First(int *buf, int num) int i4, i5, i6, i7; int t0, t1, t2, t3; - for ( ; num != 0; num--) + for ( ; num != 0; num--) { r0 = buf[0] + buf[2]; i0 = buf[1] + buf[3]; @@ -194,23 +194,23 @@ static void Radix4FFT(int *buf, int num, int bgn, int *twidTab) int i, j, step; int *xptr, *csptr; - for (num >>= 2; num != 0; num >>= 2) + for (num >>= 2; num != 0; num >>= 2) { step = 2*bgn; xptr = buf; - for (i = num; i != 0; i--) + for (i = num; i != 0; i--) { csptr = twidTab; - for (j = bgn; j != 0; j--) + for (j = bgn; j != 0; j--) { r0 = xptr[0]; r1 = xptr[1]; xptr += step; - + t0 = xptr[0]; - t1 = xptr[1]; + t1 = xptr[1]; cosx = csptr[0]; sinx = csptr[1]; r2 = MULHIGH(cosx, t0) + MULHIGH(sinx, t1); /* cos*br + sin*bi */ @@ -223,7 +223,7 @@ static void Radix4FFT(int *buf, int num, int bgn, int *twidTab) r1 = t1 - r3; r2 = t0 + r2; r3 = t1 + r3; - + t0 = xptr[0]; t1 = xptr[1]; cosx = csptr[2]; @@ -231,7 +231,7 @@ static void Radix4FFT(int *buf, int num, int bgn, int *twidTab) r4 = MULHIGH(cosx, t0) + MULHIGH(sinx, t1); /* cos*cr + sin*ci */ r5 = MULHIGH(cosx, t1) - MULHIGH(sinx, t0); /* cos*ci - sin*cr */ xptr += step; - + t0 = xptr[0]; t1 = xptr[1]; cosx = csptr[4]; @@ -282,25 +282,25 @@ static void PreMDCT(int *buf0, int num, const int *csptr) int tr1, ti1, tr2, ti2; int cosa, sina, cosb, sinb; int *buf1; - + buf1 = buf0 + num - 1; for(i = num >> 2; i != 0; i--) { - cosa = *csptr++; - sina = *csptr++; - cosb = *csptr++; - sinb = *csptr++; + cosa = *csptr++; + sina = *csptr++; + cosb = *csptr++; + sinb = *csptr++; tr1 = *(buf0 + 0); ti2 = *(buf0 + 1); tr2 = *(buf1 - 1); ti1 = *(buf1 + 0); - + *buf0++ = MULHIGH(cosa, tr1) + MULHIGH(sina, ti1); - *buf0++ = MULHIGH(cosa, ti1) - MULHIGH(sina, tr1); - - *buf1-- = MULHIGH(cosb, ti2) - MULHIGH(sinb, tr2); + *buf0++ = MULHIGH(cosa, ti1) - MULHIGH(sina, tr1); + + *buf1-- = MULHIGH(cosb, ti2) - MULHIGH(sinb, tr2); *buf1-- = MULHIGH(cosb, tr2) + MULHIGH(sinb, ti2); } } @@ -319,12 +319,12 @@ static void PostMDCT(int *buf0, int num, const int *csptr) int *buf1; buf1 = buf0 + num - 1; - + for(i = num >> 2; i != 0; i--) { - cosa = *csptr++; - sina = *csptr++; - cosb = *csptr++; + cosa = *csptr++; + sina = *csptr++; + cosb = *csptr++; sinb = *csptr++; tr1 = *(buf0 + 0); @@ -333,10 +333,10 @@ static void PostMDCT(int *buf0, int num, const int *csptr) tr2 = *(buf1 - 1); *buf0++ = MULHIGH(cosa, tr1) + MULHIGH(sina, ti1); - *buf1-- = MULHIGH(sina, tr1) - MULHIGH(cosa, ti1); - + *buf1-- = MULHIGH(sina, tr1) - MULHIGH(cosa, ti1); + *buf0++ = MULHIGH(sinb, tr2) - MULHIGH(cosb, ti2); - *buf1-- = MULHIGH(cosb, tr2) + MULHIGH(sinb, ti2); + *buf1-- = MULHIGH(cosb, tr2) + MULHIGH(sinb, ti2); } } #endif @@ -353,17 +353,17 @@ void Mdct_Long(int *buf) PreMDCT(buf, 1024, cossintab + 128); Shuffle(buf, 512, bitrevTab + 17); - Radix8First(buf, 512 >> 3); + Radix8First(buf, 512 >> 3); Radix4FFT(buf, 512 >> 3, 8, (int *)twidTab512); - PostMDCT(buf, 1024, cossintab + 128); + PostMDCT(buf, 1024, cossintab + 128); } /********************************************************************************** * * function name: Mdct_Short -* description: the short block mdct +* description: the short block mdct * **********************************************************************************/ void Mdct_Short(int *buf) @@ -371,10 +371,10 @@ void Mdct_Short(int *buf) PreMDCT(buf, 128, cossintab); Shuffle(buf, 64, bitrevTab); - Radix4First(buf, 64 >> 2); - Radix4FFT(buf, 64 >> 2, 4, (int *)twidTab64); + Radix4First(buf, 64 >> 2); + Radix4FFT(buf, 64 >> 2, 4, (int *)twidTab64); - PostMDCT(buf, 128, cossintab); + PostMDCT(buf, 128, cossintab); } @@ -382,7 +382,7 @@ void Mdct_Short(int *buf) * * function name: shiftMdctDelayBuffer * description: the mdct delay buffer has a size of 1600, -* so the calculation of LONG,STOP must be spilt in two +* so the calculation of LONG,STOP must be spilt in two * passes with 1024 samples and a mid shift, * the SHORT transforms can be completed in the delay buffer, * and afterwards a shift @@ -409,7 +409,7 @@ static void shiftMdctDelayBuffer(Word16 *mdctDelayBuffer, /*! start of mdct dela dsBuf = timeSignal; for(i=0; i<FRAME_LEN_LONG; i+=8) - { + { *srBuf++ = *dsBuf; dsBuf += chIncrement; *srBuf++ = *dsBuf; dsBuf += chIncrement; *srBuf++ = *dsBuf; dsBuf += chIncrement; @@ -470,10 +470,10 @@ void Transform_Real(Word16 *mdctDelayBuffer, Word32 delayBufferSf,timeSignalSf,minSf; Word32 headRoom=0; - + switch(blockType){ - - + + case LONG_WINDOW: /* we access BLOCK_SWITCHING_OFFSET (1600 ) delay buffer samples + 448 new timeSignal samples @@ -483,15 +483,15 @@ void Transform_Real(Word16 *mdctDelayBuffer, timeSignalSf = getScalefactorOfShortVectorStride(timeSignal,2*FRAME_LEN_LONG-BLOCK_SWITCHING_OFFSET,chIncrement); minSf = min(delayBufferSf,timeSignalSf); minSf = min(minSf,14); - + dctIn0 = mdctDelayBuffer; dctIn1 = mdctDelayBuffer + FRAME_LEN_LONG - 1; outData0 = realOut + FRAME_LEN_LONG/2; - + /* add windows and pre add for mdct to last buffer*/ winPtr = (int *)LongWindowKBD; for(i=0;i<FRAME_LEN_LONG/2;i++){ - timeSignalSample = (*dctIn0++) << minSf; + timeSignalSample = (*dctIn0++) << minSf; ws1 = timeSignalSample * (*winPtr >> 16); timeSignalSample = (*dctIn1--) << minSf; ws2 = timeSignalSample * (*winPtr & 0xffff); @@ -499,30 +499,30 @@ void Transform_Real(Word16 *mdctDelayBuffer, /* shift 2 to avoid overflow next */ *outData0++ = (ws1 >> 2) - (ws2 >> 2); } - + shiftMdctDelayBuffer(mdctDelayBuffer,timeSignal,chIncrement); - + /* add windows and pre add for mdct to new buffer*/ dctIn0 = mdctDelayBuffer; dctIn1 = mdctDelayBuffer + FRAME_LEN_LONG - 1; - outData0 = realOut + FRAME_LEN_LONG/2 - 1; + outData0 = realOut + FRAME_LEN_LONG/2 - 1; winPtr = (int *)LongWindowKBD; - for(i=0;i<FRAME_LEN_LONG/2;i++){ + for(i=0;i<FRAME_LEN_LONG/2;i++){ timeSignalSample = (*dctIn0++) << minSf; ws1 = timeSignalSample * (*winPtr & 0xffff); timeSignalSample = (*dctIn1--) << minSf; ws2 = timeSignalSample * (*winPtr >> 16); winPtr++; /* shift 2 to avoid overflow next */ - *outData0-- = -((ws1 >> 2) + (ws2 >> 2)); + *outData0-- = -((ws1 >> 2) + (ws2 >> 2)); } Mdct_Long(realOut); /* update scale factor */ minSf = 14 - minSf; - *mdctScale=minSf; + *mdctScale=minSf; break; - + case START_WINDOW: /* we access BLOCK_SWITCHING_OFFSET (1600 ) delay buffer samples + no timeSignal samples @@ -533,7 +533,7 @@ void Transform_Real(Word16 *mdctDelayBuffer, dctIn0 = mdctDelayBuffer; dctIn1 = mdctDelayBuffer + FRAME_LEN_LONG - 1; - outData0 = realOut + FRAME_LEN_LONG/2; + outData0 = realOut + FRAME_LEN_LONG/2; winPtr = (int *)LongWindowKBD; /* add windows and pre add for mdct to last buffer*/ @@ -545,18 +545,18 @@ void Transform_Real(Word16 *mdctDelayBuffer, winPtr ++; *outData0++ = (ws1 >> 2) - (ws2 >> 2); /* shift 2 to avoid overflow next */ } - + shiftMdctDelayBuffer(mdctDelayBuffer,timeSignal,chIncrement); - - outData0 = realOut + FRAME_LEN_LONG/2 - 1; + + outData0 = realOut + FRAME_LEN_LONG/2 - 1; for(i=0;i<LS_TRANS;i++){ - *outData0-- = -mdctDelayBuffer[i] << (15 - 2 + minSf); + *outData0-- = -mdctDelayBuffer[i] << (15 - 2 + minSf); } - + /* add windows and pre add for mdct to new buffer*/ dctIn0 = mdctDelayBuffer + LS_TRANS; dctIn1 = mdctDelayBuffer + FRAME_LEN_LONG - 1 - LS_TRANS; - outData0 = realOut + FRAME_LEN_LONG/2 - 1 -LS_TRANS; + outData0 = realOut + FRAME_LEN_LONG/2 - 1 -LS_TRANS; winPtr = (int *)ShortWindowSine; for(i=0;i<FRAME_LEN_SHORT/2;i++){ timeSignalSample= (*dctIn0++) << minSf; @@ -572,7 +572,7 @@ void Transform_Real(Word16 *mdctDelayBuffer, minSf = 14 - minSf; *mdctScale= minSf; break; - + case STOP_WINDOW: /* we access BLOCK_SWITCHING_OFFSET-LS_TRANS (1600-448 ) delay buffer samples + 448 new timeSignal samples @@ -580,19 +580,19 @@ void Transform_Real(Word16 *mdctDelayBuffer, */ delayBufferSf = getScalefactorOfShortVectorStride(mdctDelayBuffer+LS_TRANS,BLOCK_SWITCHING_OFFSET-LS_TRANS,1); timeSignalSf = getScalefactorOfShortVectorStride(timeSignal,2*FRAME_LEN_LONG-BLOCK_SWITCHING_OFFSET,chIncrement); - minSf = min(delayBufferSf,timeSignalSf); + minSf = min(delayBufferSf,timeSignalSf); minSf = min(minSf,13); - + outData0 = realOut + FRAME_LEN_LONG/2; dctIn1 = mdctDelayBuffer + FRAME_LEN_LONG - 1; for(i=0;i<LS_TRANS;i++){ - *outData0++ = -(*dctIn1--) << (15 - 2 + minSf); + *outData0++ = -(*dctIn1--) << (15 - 2 + minSf); } - + /* add windows and pre add for mdct to last buffer*/ dctIn0 = mdctDelayBuffer + LS_TRANS; dctIn1 = mdctDelayBuffer + FRAME_LEN_LONG - 1 - LS_TRANS; - outData0 = realOut + FRAME_LEN_LONG/2 + LS_TRANS; + outData0 = realOut + FRAME_LEN_LONG/2 + LS_TRANS; winPtr = (int *)ShortWindowSine; for(i=0;i<FRAME_LEN_SHORT/2;i++){ timeSignalSample = (*dctIn0++) << minSf; @@ -602,13 +602,13 @@ void Transform_Real(Word16 *mdctDelayBuffer, winPtr++; *outData0++ = (ws1 >> 2) - (ws2 >> 2); /* shift 2 to avoid overflow next */ } - + shiftMdctDelayBuffer(mdctDelayBuffer,timeSignal,chIncrement); - + /* add windows and pre add for mdct to new buffer*/ dctIn0 = mdctDelayBuffer; dctIn1 = mdctDelayBuffer + FRAME_LEN_LONG - 1; - outData0 = realOut + FRAME_LEN_LONG/2 - 1; + outData0 = realOut + FRAME_LEN_LONG/2 - 1; winPtr = (int *)LongWindowKBD; for(i=0;i<FRAME_LEN_LONG/2;i++){ timeSignalSample= (*dctIn0++) << minSf; @@ -618,26 +618,26 @@ void Transform_Real(Word16 *mdctDelayBuffer, *outData0-- = -((ws1 >> 2) + (ws2 >> 2)); /* shift 2 to avoid overflow next */ winPtr++; } - + Mdct_Long(realOut); minSf = 14 - minSf; *mdctScale= minSf; /* update scale factor */ break; - + case SHORT_WINDOW: /* we access BLOCK_SWITCHING_OFFSET (1600 ) delay buffer samples + no new timeSignal samples and get the biggest scale factor for next calculate more precise - */ + */ minSf = getScalefactorOfShortVectorStride(mdctDelayBuffer+TRANSFORM_OFFSET_SHORT,9*FRAME_LEN_SHORT,1); minSf = min(minSf,10); - - + + for(w=0;w<TRANS_FAC;w++){ dctIn0 = mdctDelayBuffer+w*FRAME_LEN_SHORT+TRANSFORM_OFFSET_SHORT; dctIn1 = mdctDelayBuffer+w*FRAME_LEN_SHORT+TRANSFORM_OFFSET_SHORT + FRAME_LEN_SHORT-1; - outData0 = realOut + FRAME_LEN_SHORT/2; - outData1 = realOut + FRAME_LEN_SHORT/2 - 1; + outData0 = realOut + FRAME_LEN_SHORT/2; + outData1 = realOut + FRAME_LEN_SHORT/2 - 1; winPtr = (int *)ShortWindowSine; for(i=0;i<FRAME_LEN_SHORT/2;i++){ @@ -646,7 +646,7 @@ void Transform_Real(Word16 *mdctDelayBuffer, timeSignalSample= *dctIn1 << minSf; ws2 = timeSignalSample * (*winPtr & 0xffff); *outData0++ = (ws1 >> 2) - (ws2 >> 2); /* shift 2 to avoid overflow next */ - + timeSignalSample= *(dctIn0 + FRAME_LEN_SHORT) << minSf; ws1 = timeSignalSample * (*winPtr & 0xffff); timeSignalSample= *(dctIn1 + FRAME_LEN_SHORT) << minSf; @@ -661,10 +661,10 @@ void Transform_Real(Word16 *mdctDelayBuffer, Mdct_Short(realOut); realOut += FRAME_LEN_SHORT; } - + minSf = 11 - minSf; *mdctScale = minSf; /* update scale factor */ - + shiftMdctDelayBuffer(mdctDelayBuffer,timeSignal,chIncrement); break; } |