From dacaa73ae5010b66f4224d70a520945e5b653544 Mon Sep 17 00:00:00 2001 From: Andreas Huber Date: Mon, 7 Dec 2009 09:56:32 -0800 Subject: Initial check in of stagefright software AAC decoder based on PV source code. --- media/libstagefright/codecs/aacdec/dst32.cpp | 200 +++++++++++++++++++++++++++ 1 file changed, 200 insertions(+) create mode 100644 media/libstagefright/codecs/aacdec/dst32.cpp (limited to 'media/libstagefright/codecs/aacdec/dst32.cpp') diff --git a/media/libstagefright/codecs/aacdec/dst32.cpp b/media/libstagefright/codecs/aacdec/dst32.cpp new file mode 100644 index 0000000..5edecf1 --- /dev/null +++ b/media/libstagefright/codecs/aacdec/dst32.cpp @@ -0,0 +1,200 @@ +/* ------------------------------------------------------------------ + * 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. + * ------------------------------------------------------------------- + */ +/* + + Filename: dst32.c + +------------------------------------------------------------------------------ + REVISION HISTORY + + + Who: Date: MM/DD/YYYY + Description: + +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + Int32 x 32-bit integer input length 32 + + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + Implement discrete sine transform of lenght 32 + +------------------------------------------------------------------------------ + REQUIREMENTS + + +------------------------------------------------------------------------------ + REFERENCES + +------------------------------------------------------------------------------ + PSEUDO-CODE + +------------------------------------------------------------------------------ +*/ + + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ + +#ifdef AAC_PLUS + + +#include "dst32.h" +#include "dst16.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_SHIFT1 29 +#define Qfmt29(x) (Int32)(x*((Int32)1<=0?0.5F:-0.5F)) +#define Qfmt31(a) (Int32)(a*0x7FFFFFFF + (a>=0?0.5F:-0.5F)) + +const Int32 CosTable_16[14] = +{ + Qfmt31(0.50060299823520F), Qfmt31(0.50547095989754F), + Qfmt31(0.51544730992262F), Qfmt31(0.53104259108978F), + Qfmt31(0.55310389603444F), Qfmt31(0.58293496820613F), + Qfmt31(0.62250412303566F), Qfmt31(0.67480834145501F), + Qfmt31(0.74453627100230F), Qfmt31(0.83934964541553F), + Qfmt29(0.97256823786196F), Qfmt29(1.16943993343288F), + Qfmt29(1.48416461631417F), Qfmt29(2.05778100995341F) +}; + +/*---------------------------------------------------------------------------- +; LOCAL FUNCTION DEFINITIONS +; Function Prototype declaration +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL STORE/BUFFER/POINTER DEFINITIONS +; Variable declaration - defined here and used outside this module +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; EXTERNAL FUNCTION REFERENCES +; Declare functions defined elsewhere and referenced in this module +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES +; Declare variables used in this module but defined elsewhere +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; FUNCTION CODE +----------------------------------------------------------------------------*/ + + +void dst_32(Int32 vec[], Int32 scratch_mem[]) /* scratch_mem size 32 */ +{ + Int32 *temp_even = scratch_mem; + + Int32 i; + const Int32 *pt_cos = &CosTable_16[13]; + Int32 tmp0 = vec[31] >> 1; + Int32 tmp1, tmp2; + Int32 *pt_even = temp_even; + Int32 *pt_odd = vec; + Int32 *pt_vec = vec; + Int32 *pt_vecN_1 = vec; + Int32 tmp3; + + + tmp1 = 0; + + for (i = 5; i != 0; i--) + { + *(pt_even++) = *(pt_vec++); + tmp2 = *(pt_vec++); + *(pt_even++) = *(pt_vec++); + tmp3 = *(pt_vec++); + *(pt_even++) = *(pt_vec++); + *(pt_odd++) = tmp2 + tmp1; + *(pt_odd++) = tmp3 + tmp2; + tmp1 = *(pt_vec++); + *(pt_odd++) = tmp1 + tmp3; + } + + *(pt_even) = *(pt_vec++); + *(pt_odd) = *(pt_vec) + tmp1; + + + dst_16(temp_even, &scratch_mem[16]); + dst_16(vec, &scratch_mem[24]); + + + pt_vecN_1 = &vec[16]; + + tmp1 = temp_even[15]; + + tmp3 = fxp_mul32_Q31((vec[15] - tmp0) << 3, Qfmt31(0.63687550772175F)) << 2; + tmp2 = temp_even[14]; + *(pt_vecN_1++) = tmp3 - tmp1; + vec[15] = tmp3 + tmp1; + tmp1 = temp_even[13]; + tmp3 = fxp_mul32_Q31((vec[14] + tmp0) << 3, Qfmt31(0.85190210461718F)); + *(pt_vecN_1++) = tmp3 - tmp2; + vec[14] = tmp3 + tmp2; + + pt_even = &temp_even[12]; + pt_vec = &vec[13]; + + for (i = 2; i != 0; i--) + { + tmp3 = fxp_mul32_Q29((*(pt_vec) - tmp0), *(pt_cos--)); + tmp2 = *(pt_even--); + *(pt_vec--) = tmp3 + tmp1; + *(pt_vecN_1++) = tmp3 - tmp1; + tmp3 = fxp_mul32_Q29((*(pt_vec) + tmp0), *(pt_cos--)); + tmp1 = *(pt_even--); + *(pt_vec--) = tmp3 + tmp2; + *(pt_vecN_1++) = tmp3 - tmp2; + } + + for (i = 5; i != 0; i--) + { + tmp3 = fxp_mul32_Q31((*(pt_vec) - tmp0) << 1, *(pt_cos--)); + tmp2 = *(pt_even--); + *(pt_vec--) = tmp3 + tmp1; + *(pt_vecN_1++) = tmp3 - tmp1; + tmp3 = fxp_mul32_Q31((*(pt_vec) + tmp0) << 1, *(pt_cos--)); + tmp1 = *(pt_even--); + *(pt_vec--) = tmp3 + tmp2; + *(pt_vecN_1++) = tmp3 - tmp2; + } + + +} + +#endif -- cgit v1.1