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author | Andreas Huber <andih@google.com> | 2009-12-08 15:40:06 -0800 |
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committer | Andreas Huber <andih@google.com> | 2009-12-10 12:23:55 -0800 |
commit | 4f1efc098cb5791c3e9f483f2af84aef70d2d0a0 (patch) | |
tree | a2873e84aed3eecb1198f85954e24cddb1bdc380 /media/libstagefright/codecs/amrwb/src/band_pass_6k_7k.cpp | |
parent | c54176addef15699a518b69cd6bbd40ffc95e72e (diff) | |
download | frameworks_av-4f1efc098cb5791c3e9f483f2af84aef70d2d0a0.zip frameworks_av-4f1efc098cb5791c3e9f483f2af84aef70d2d0a0.tar.gz frameworks_av-4f1efc098cb5791c3e9f483f2af84aef70d2d0a0.tar.bz2 |
Initial check in of AMR (NB and WB) decoders based on PV source code.
Diffstat (limited to 'media/libstagefright/codecs/amrwb/src/band_pass_6k_7k.cpp')
-rw-r--r-- | media/libstagefright/codecs/amrwb/src/band_pass_6k_7k.cpp | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrwb/src/band_pass_6k_7k.cpp b/media/libstagefright/codecs/amrwb/src/band_pass_6k_7k.cpp new file mode 100644 index 0000000..97c7402 --- /dev/null +++ b/media/libstagefright/codecs/amrwb/src/band_pass_6k_7k.cpp @@ -0,0 +1,240 @@ +/* ------------------------------------------------------------------ + * 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: band_pass_6k_7k.cpp + + Date: 05/08/2004 + +------------------------------------------------------------------------------ + REVISION HISTORY + + + Description: + +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + int16 signal[], input signal / output is divided by 16 + int16 lg, lenght of signal + int16 mem[] in/out: memory (size=30) + int16 x[] scratch mem ( size= 60) + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + 15th order band pass 6kHz to 7kHz FIR filter. + + frequency: 4kHz 5kHz 5.5kHz 6kHz 6.5kHz 7kHz 7.5kHz 8kHz + dB loss: -60dB -45dB -13dB -3dB 0dB -3dB -13dB -45dB + + +------------------------------------------------------------------------------ + REQUIREMENTS + + +------------------------------------------------------------------------------ + REFERENCES + +------------------------------------------------------------------------------ + PSEUDO-CODE + +------------------------------------------------------------------------------ +*/ + + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ + + +#include "pv_amr_wb_type_defs.h" +#include "pvamrwbdecoder_basic_op.h" +#include "pvamrwbdecoder_acelp.h" +#include "pvamrwbdecoder_cnst.h" + +/*---------------------------------------------------------------------------- +; MACROS +; Define module specific macros here +----------------------------------------------------------------------------*/ + + +/*---------------------------------------------------------------------------- +; DEFINES +; Include all pre-processor statements here. Include conditional +; compile variables also. +----------------------------------------------------------------------------*/ + +#define L_FIR 30 + +/*---------------------------------------------------------------------------- +; LOCAL FUNCTION DEFINITIONS +; Function Prototype declaration +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL STORE/BUFFER/POINTER DEFINITIONS +; Variable declaration - defined here and used outside this module +----------------------------------------------------------------------------*/ + +/* filter coefficients (gain=4.0) */ + +const int16 fir_6k_7k[L_FIR] = +{ + -32, 47, 32, -27, + -369, 1122, -1421, 0, + 3798, -8880, 12349, -10984, + 3548, 7766, -18001, + 22118, + -18001, 7766, 3548, -10984, + 12349, -8880, 3798, 0, + -1421, 1122, -369, -27, + 32, 47 +}; + +/*---------------------------------------------------------------------------- +; 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 band_pass_6k_7k_init(int16 mem[]) /* mem[30] */ +{ + pv_memset((void *)mem, 0, L_FIR*sizeof(*mem)); +} + + +/*---------------------------------------------------------------------------- +; FUNCTION CODE +----------------------------------------------------------------------------*/ + + +void band_pass_6k_7k( + int16 signal[], /* input: signal */ + int16 lg, /* input: length of input */ + int16 mem[], /* in/out: memory (size=30) */ + int16 x[] +) +{ + int16 i, j; + int32 L_tmp1; + int32 L_tmp2; + int32 L_tmp3; + int32 L_tmp4; + + int16 *pt_sign = signal; + + pv_memcpy((void *)x, (void *)mem, L_FIR*sizeof(*x)); + + + for (i = 0; i < lg >> 2; i++) + { + + x[(i<<2) + L_FIR ] = *(pt_sign) >> 2; /* gain of filter = 4 */ + x[(i<<2) + L_FIR + 1] = *(pt_sign + 1) >> 2; /* gain of filter = 4 */ + x[(i<<2) + L_FIR + 2] = *(pt_sign + 2) >> 2; /* gain of filter = 4 */ + x[(i<<2) + L_FIR + 3] = *(pt_sign + 3) >> 2; /* gain of filter = 4 */ + + L_tmp1 = 0x00004000; + L_tmp2 = 0x00004000; + L_tmp3 = 0x00004000; + L_tmp4 = 0x00004000; + + L_tmp1 -= ((int32)x[(i<<2)+L_FIR ] << 5); + L_tmp2 -= ((int32)x[(i<<2)+L_FIR+1] << 5); + L_tmp3 -= ((int32)x[(i<<2)+L_FIR+2] << 5); + L_tmp4 -= ((int32)x[(i<<2)+L_FIR+3] << 5); + + L_tmp1 -= ((int32)x[(i<<2)] << 5); + L_tmp2 -= ((int32)x[(i<<2)+1] << 5); + L_tmp3 -= ((int32)x[(i<<2)+2] << 5); + L_tmp4 -= ((int32)x[(i<<2)+3] << 5); + + + for (j = 1; j < L_FIR - 1; j += 4) + { + int16 tmp1 = x[(i<<2)+j ]; + int16 tmp2 = x[(i<<2)+j+1]; + int16 tmp3 = x[(i<<2)+j+2]; + + L_tmp1 = fxp_mac_16by16(tmp1, fir_6k_7k[j ], L_tmp1); + L_tmp2 = fxp_mac_16by16(tmp2, fir_6k_7k[j ], L_tmp2); + L_tmp1 = fxp_mac_16by16(tmp2, fir_6k_7k[j+1], L_tmp1); + L_tmp2 = fxp_mac_16by16(tmp3, fir_6k_7k[j+1], L_tmp2); + L_tmp3 = fxp_mac_16by16(tmp3, fir_6k_7k[j ], L_tmp3); + L_tmp1 = fxp_mac_16by16(tmp3, fir_6k_7k[j+2], L_tmp1); + + tmp1 = x[(i<<2)+j+3]; + tmp2 = x[(i<<2)+j+4]; + + L_tmp2 = fxp_mac_16by16(tmp1, fir_6k_7k[j+2], L_tmp2); + L_tmp4 = fxp_mac_16by16(tmp1, fir_6k_7k[j ], L_tmp4); + L_tmp3 = fxp_mac_16by16(tmp1, fir_6k_7k[j+1], L_tmp3); + L_tmp1 = fxp_mac_16by16(tmp1, fir_6k_7k[j+3], L_tmp1); + L_tmp2 = fxp_mac_16by16(tmp2, fir_6k_7k[j+3], L_tmp2); + L_tmp4 = fxp_mac_16by16(tmp2, fir_6k_7k[j+1], L_tmp4); + L_tmp3 = fxp_mac_16by16(tmp2, fir_6k_7k[j+2], L_tmp3); + + tmp1 = x[(i<<2)+j+5]; + tmp2 = x[(i<<2)+j+6]; + + L_tmp4 = fxp_mac_16by16(tmp1, fir_6k_7k[j+2], L_tmp4); + L_tmp3 = fxp_mac_16by16(tmp1, fir_6k_7k[j+3], L_tmp3); + L_tmp4 = fxp_mac_16by16(tmp2, fir_6k_7k[j+3], L_tmp4); + + } + + L_tmp1 = fxp_mac_16by16(x[(i<<2)+j ], fir_6k_7k[L_FIR-1 ], L_tmp1); + L_tmp2 = fxp_mac_16by16(x[(i<<2)+j+1], fir_6k_7k[L_FIR-1 ], L_tmp2); + L_tmp3 = fxp_mac_16by16(x[(i<<2)+j+2], fir_6k_7k[L_FIR-1 ], L_tmp3); + L_tmp4 = fxp_mac_16by16(x[(i<<2)+j+3], fir_6k_7k[L_FIR-1 ], L_tmp4); + + + *(pt_sign++) = (int16)(L_tmp1 >> 15); + *(pt_sign++) = (int16)(L_tmp2 >> 15); + *(pt_sign++) = (int16)(L_tmp3 >> 15); + *(pt_sign++) = (int16)(L_tmp4 >> 15); + + } + + pv_memcpy((void *)mem, (void *)(x + lg), L_FIR*sizeof(*mem)); + +} + |