diff options
Diffstat (limited to 'media/libstagefright/codecs/amrwb/src/deemphasis_32.cpp')
| -rw-r--r-- | media/libstagefright/codecs/amrwb/src/deemphasis_32.cpp | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/media/libstagefright/codecs/amrwb/src/deemphasis_32.cpp b/media/libstagefright/codecs/amrwb/src/deemphasis_32.cpp deleted file mode 100644 index b80555b..0000000 --- a/media/libstagefright/codecs/amrwb/src/deemphasis_32.cpp +++ /dev/null @@ -1,166 +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. - * ------------------------------------------------------------------- - */ -/**************************************************************************************** -Portions of this file are derived from the following 3GPP standard: - - 3GPP TS 26.173 - ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec - Available from http://www.3gpp.org - -(C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) -Permission to distribute, modify and use this file under the standard license -terms listed above has been obtained from the copyright holder. -****************************************************************************************/ -/* ------------------------------------------------------------------------------- - - - - Filename: deemphasis_32.cpp - - Date: 05/08/2004 - ------------------------------------------------------------------------------- - REVISION HISTORY - - - Description: - ------------------------------------------------------------------------------- - INPUT AND OUTPUT DEFINITIONS - - int16 x_hi[], (i) : input signal (bit31..16) - int16 x_lo[], (i) : input signal (bit15..4) - int16 y[], (o) : output signal (x16) - int16 mu, (i) Q15 : deemphasis factor - int16 L, (i) : vector size - int16 * mem (i/o) : memory (y[-1]) - ------------------------------------------------------------------------------- - FUNCTION DESCRIPTION - - 32-bits filtering through 1/(1-mu z^-1) - ------------------------------------------------------------------------------- - REQUIREMENTS - - ------------------------------------------------------------------------------- - REFERENCES - ------------------------------------------------------------------------------- - PSEUDO-CODE - - Deemphasis H(z) = 1/(1 - 0.68z^(-1)) where mu = 0.67999 in Q15 - ------------------------------------------------------------------------------- -*/ - - -/*---------------------------------------------------------------------------- -; INCLUDES -----------------------------------------------------------------------------*/ - -#include "pv_amr_wb_type_defs.h" -#include "pvamrwbdecoder_basic_op.h" -#include "pvamrwb_math_op.h" -#include "pvamrwbdecoder_acelp.h" - -/*---------------------------------------------------------------------------- -; MACROS -; Define module specific macros here -----------------------------------------------------------------------------*/ - - -/*---------------------------------------------------------------------------- -; DEFINES -; Include all pre-processor statements here. Include conditional -; compile variables also. -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; 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 deemphasis_32( - int16 x_hi[], /* (i) : input signal (bit31..16) */ - int16 x_lo[], /* (i) : input signal (bit15..4) */ - int16 y[], /* (o) : output signal (x16) */ - int16 mu, /* (i) Q15 : deemphasis factor */ - int16 L, /* (i) : vector size */ - int16 * mem /* (i/o) : memory (y[-1]) */ -) -{ - int16 i; - int32 L_tmp; - int16 lo, hi; - - L_tmp = ((int32)x_hi[0]) << 16; - L_tmp += ((int32)x_lo[0]) << 4; - L_tmp = shl_int32(L_tmp, 3); - - L_tmp = fxp_mac_16by16(*mem, mu, L_tmp), - - L_tmp = shl_int32(L_tmp, 1); /* saturation can occur here */ - y[0] = amr_wb_round(L_tmp); - - lo = x_lo[1]; - hi = x_hi[1]; - for (i = 1; i < L - 1; i++) - { - L_tmp = ((int32)hi) << 16; - L_tmp += ((int32)lo) << 4; - L_tmp = shl_int32(L_tmp, 3); - L_tmp = fxp_mac_16by16(y[i - 1], mu, L_tmp), - L_tmp = shl_int32(L_tmp, 1); /* saturation can occur here */ - y[i] = amr_wb_round(L_tmp); - lo = x_lo[i+1]; - hi = x_hi[i+1]; - } - L_tmp = ((int32)hi) << 16; - L_tmp += ((int32)lo) << 4; - L_tmp = shl_int32(L_tmp, 3); - L_tmp = fxp_mac_16by16(y[i - 1], mu, L_tmp), - L_tmp = shl_int32(L_tmp, 1); /* saturation can occur here */ - y[i] = amr_wb_round(L_tmp); - - *mem = y[L - 1]; - - return; -} - |