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-rw-r--r--media/libstagefright/codecs/aacdec/ps_fft_rx8.cpp318
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diff --git a/media/libstagefright/codecs/aacdec/ps_fft_rx8.cpp b/media/libstagefright/codecs/aacdec/ps_fft_rx8.cpp
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index 7669be3..0000000
--- a/media/libstagefright/codecs/aacdec/ps_fft_rx8.cpp
+++ /dev/null
@@ -1,318 +0,0 @@
-/* ------------------------------------------------------------------
- * Copyright (C) 1998-2009 PacketVideo
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
- * express or implied.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- * -------------------------------------------------------------------
- */
-/*
-
- Pathname: fft_rx8.c
- Funtions: ps_fft_rx8
-
-------------------------------------------------------------------------------
- REVISION HISTORY
-
-
-
- Who: Date:
- Description:
-
-------------------------------------------------------------------------------
- INPUT AND OUTPUT DEFINITIONS
-
- Inputs:
- Real Vector of Real components size 8
-
- Imag Vector of Imag components size 8
- type Int32
-
-
- Local Stores/Buffers/Pointers Needed:
- None
-
- Global Stores/Buffers/Pointers Needed:
- scratch_mem size 32
-
- Outputs:
- In-place calculation of a 8-point FFT (radix-8)
-
- Pointers and Buffers Modified:
- calculation are done in-place and returned in Data
-
- Local Stores Modified:
- None
-
- Global Stores Modified:
- None
-
-------------------------------------------------------------------------------
- FUNCTION DESCRIPTION
-
- 8-point DFT, radix 8 with Decimation in Frequency
-
-------------------------------------------------------------------------------
- REQUIREMENTS
-
- This function should provide a fixed point FFT for any input array
- of size power of 8.
-
-------------------------------------------------------------------------------
- REFERENCES
-
- [1] Advance Digital Signal Processing, J. Proakis, C. Rader, F. Ling,
- C. Nikias, Macmillan Pub. Co.
-
-------------------------------------------------------------------------------
- PSEUDO-CODE
-
-
- MODIFY( x[] )
- RETURN( exponent )
-
-------------------------------------------------------------------------------
- RESOURCES USED
- When the code is written for a specific target processor the
- the resources used should be documented below.
-
- STACK USAGE: [stack count for this module] + [variable to represent
- stack usage for each subroutine called]
-
- where: [stack usage variable] = stack usage for [subroutine
- name] (see [filename].ext)
-
- DATA MEMORY USED: x words
-
- PROGRAM MEMORY USED: x words
-
- CLOCK CYCLES: [cycle count equation for this module] + [variable
- used to represent cycle count for each subroutine
- called]
-
- where: [cycle count variable] = cycle count for [subroutine
- name] (see [filename].ext)
-
-------------------------------------------------------------------------------
-*/
-/*----------------------------------------------------------------------------
-; INCLUDES
-----------------------------------------------------------------------------*/
-
-#ifdef AAC_PLUS
-
-
-#ifdef PARAMETRICSTEREO
-
-
-#include "pv_audio_type_defs.h"
-#include "ps_fft_rx8.h"
-
-#include "fxp_mul32.h"
-
-/*----------------------------------------------------------------------------
-; MACROS
-; Define module specific macros here
-----------------------------------------------------------------------------*/
-
-/*----------------------------------------------------------------------------
-; DEFINES
-; Include all pre-processor statements here. Include conditional
-; compile variables also.
-----------------------------------------------------------------------------*/
-#define R_SHIFT 29
-#define Q29_fmt(x) (Int32)(x*((Int32)1<<R_SHIFT) + (x>=0?0.5F:-0.5F))
-
-/*----------------------------------------------------------------------------
-; LOCAL FUNCTION DEFINITIONS
-; Function Prototype declaration
-----------------------------------------------------------------------------*/
-
-/*----------------------------------------------------------------------------
-; LOCAL VARIABLE DEFINITIONS
-; Variable declaration - defined here and used outside this module
-----------------------------------------------------------------------------*/
-
-/*----------------------------------------------------------------------------
-; EXTERNAL FUNCTION REFERENCES
-; Declare functions defined elsewhere and referenced in this module
-----------------------------------------------------------------------------*/
-
-/*----------------------------------------------------------------------------
-; EXTERNAL VARIABLES REFERENCES
-; Declare variables used in this module but defined elsewhere
-----------------------------------------------------------------------------*/
-
-/*----------------------------------------------------------------------------
-; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
-; Declare variables used in this module but defined elsewhere
-----------------------------------------------------------------------------*/
-
-/*----------------------------------------------------------------------------
-; FUNCTION CODE
-----------------------------------------------------------------------------*/
-
-void ps_fft_rx8(Int32 Re[], Int32 Im[], Int32 scratch_mem[])
-
-/* scratch_mem size 32 */
-{
-
- Int i;
- Int32 *Q = &scratch_mem[0];
- Int32 *Z = &scratch_mem[16];
- Int32 temp1;
- Int32 temp2;
- Int32 temp3;
- Int32 temp4;
- Int32 aux_r[2];
- Int32 aux_i[2];
- Int32 *pt_r1 = &Re[0];
- Int32 *pt_r2 = &Re[4];
- Int32 *pt_i1 = &Im[0];
- Int32 *pt_i2 = &Im[4];
-
- Int32 *pt_Q = Q;
- Int32 *pt_Z = Z;
-
-
- temp1 = *(pt_r1++); /* Real */
- temp2 = *(pt_r2++); /* Real */
- temp3 = *(pt_i1++); /* Imag */
- temp4 = *(pt_i2++); /* Imag */
- /*
- * Vector Q stores data as Real, Imag, Real, Imag,....
- */
-
- *(pt_Q++) = temp1 + temp2; /* Q(0) = v(0) + v(4) */
- *(pt_Q++) = temp3 + temp4;
- *(pt_Q++) = temp1 - temp2; /* Q(1) = v(0) - v(4) */
- *(pt_Q++) = temp3 - temp4;
-
- temp1 = *(pt_r1++);
- temp2 = *(pt_r2++);
- temp3 = *(pt_i1++);
- temp4 = *(pt_i2++);
-
- *(pt_Q++) = temp1 + temp2; /* Q(2) = v(1) + v(5) */
- *(pt_Q++) = temp3 + temp4;
- aux_r[0] = temp1 - temp2; /* aux[0] = v(1) - v(5) */
- aux_i[0] = temp3 - temp4;
-
- temp1 = *(pt_r1++);
- temp2 = *(pt_r2++);
- temp3 = *(pt_i1++);
- temp4 = *(pt_i2++);
-
- *(pt_Q++) = temp1 + temp2; /* Q(3) = v(2) + v(6) */
- *(pt_Q++) = temp3 + temp4;
- *(pt_Q++) = temp4 - temp3; /* Q(4) = (v(2) - v(6))*j */
- *(pt_Q++) = temp1 - temp2;
-
- temp1 = *(pt_r1++);
- temp2 = *(pt_r2++);
- temp3 = *(pt_i1++);
- temp4 = *(pt_i2++);
-
-
- *(pt_Q++) = temp1 + temp2; /* Q(5) = v(3) + v(7) */
- *(pt_Q++) = temp3 + temp4;
- aux_r[1] = temp1 - temp2; /* aux[1] = v(3) - v(7) */
- aux_i[1] = temp3 - temp4;
- /* Q(6) = (aux[0] - aux[1])/sqrt(2); */
- *(pt_Q++) = fxp_mul32_Q29((aux_r[0] - aux_r[1]), Q29_fmt(0.70710678118655f));
- *(pt_Q++) = fxp_mul32_Q29((aux_i[0] - aux_i[1]), Q29_fmt(0.70710678118655f));
-
- /* Q(7) = (aux[0] + aux[1])*j/sqrt(2); */
- *(pt_Q++) = fxp_mul32_Q29((aux_i[0] + aux_i[1]), Q29_fmt(-0.70710678118655f));
- *(pt_Q) = fxp_mul32_Q29((aux_r[0] + aux_r[1]), Q29_fmt(0.70710678118655f));
-
- pt_r1 = &Q[0]; /* reset pointer */
- pt_r2 = &Q[6]; /* reset pointer */
-
- temp1 = *(pt_r1++);
- temp2 = *(pt_r2++);
- temp3 = *(pt_r1++);
- temp4 = *(pt_r2++);
-
- /*
- * Vector Z stores data as Real, Imag, Real, Imag,....
- */
-
- *(pt_Z++) = temp1 + temp2; /* Q(0) + Q(3) */
- *(pt_Z++) = temp3 + temp4;
- aux_r[0] = temp1 - temp2;
- aux_i[0] = temp3 - temp4;
-
- temp1 = *(pt_r1++);
- temp2 = *(pt_r2++);
- temp3 = *(pt_r1++);
- temp4 = *(pt_r2++);
-
- *(pt_Z++) = temp1 + temp2; /* Q(1) + Q(4) */
- *(pt_Z++) = temp3 + temp4;
- *(pt_Z++) = aux_r[0]; /* Q(0) - Q(3) */
- *(pt_Z++) = aux_i[0];
- *(pt_Z++) = temp1 - temp2; /* Q(1) - Q(4) */
- *(pt_Z++) = temp3 - temp4;
-
- temp1 = *(pt_r1++);
- temp2 = *(pt_r2++);
- temp3 = *(pt_r1);
- temp4 = *(pt_r2++);
-
- *(pt_Z++) = temp1 + temp2; /* Q(2) + Q(5) */
- *(pt_Z++) = temp3 + temp4;
- aux_r[0] = temp1 - temp2;
- aux_i[0] = temp3 - temp4;
-
- temp1 = *(pt_r2++);
- temp3 = *(pt_r2++);
- temp2 = *(pt_r2++);
- temp4 = *(pt_r2);
-
- *(pt_Z++) = temp1 + temp2; /* Q(6) + Q(7) */
- *(pt_Z++) = temp3 + temp4;
-
- *(pt_Z++) = -aux_i[0]; /* (Q(2) - Q(5))*j */
- *(pt_Z++) = aux_r[0];
-
- *(pt_Z++) = temp2 - temp1; /* -Q(6) + Q(7) */
- *(pt_Z) = temp4 - temp3;
-
- pt_Z = &Z[0]; /* reset pointer */
- pt_Q = &Z[8]; /* reset pointer */
-
- pt_r1 = &Re[0];
- pt_r2 = &Re[4];
- pt_i1 = &Im[0];
- pt_i2 = &Im[4];
-
-
- for (i = 4; i != 0; i--)
- {
- temp1 = *(pt_Z++);
- temp2 = *(pt_Q++);
- temp3 = *(pt_Z++);
- temp4 = *(pt_Q++);
-
- *(pt_r1++) = temp1 + temp2; /* Z(n) + Z(n+4) */
- *(pt_i1++) = temp3 + temp4;
- *(pt_r2++) = temp1 - temp2; /* Z(n) - Z(n+4) */
- *(pt_i2++) = temp3 - temp4;
- }
-
-}
-
-#endif /* PARAMETRICSTEREO */
-
-
-#endif /* AAC_PLUS */
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