14f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* ------------------------------------------------------------------ 24f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Copyright (C) 1998-2009 PacketVideo 34f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 44f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 54f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * you may not use this file except in compliance with the License. 64f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * You may obtain a copy of the License at 74f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 84f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 94f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Unless required by applicable law or agreed to in writing, software 114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * express or implied. 144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * See the License for the specific language governing permissions 154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * and limitations under the License. 164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * ------------------------------------------------------------------- 174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/**************************************************************************************** 194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPortions of this file are derived from the following 3GPP standard: 204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3GPP TS 26.073 224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Available from http://www.3gpp.org 244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPermission to distribute, modify and use this file under the standard license 274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberterms listed above has been obtained from the copyright holder. 284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber****************************************************************************************/ 294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Pathname: ./audio/gsm-amr/c/src/amrdecode.c 344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 05/23/2001 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: AMRDecode now doesn't call getbits() or put_header_in(). 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber It also now obtains a new bit_offset value from a constant 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rather than from the returned value of getbits(). 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: AMRDecode now returns byte_offset rather than bit_offset, 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber so the program can access the next frame that is byte 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber aligned rather than packed without padding. 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: The structure types Speech_Decode_FrameState are now 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber passed into amrdecode( ) using void pointers, so that 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber higher level functions don't need to know anything about 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber this structure type. 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Changed input argument list. Added code to handle incoming DTX 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frames, and added call to wmf_to_ets function prior to calling 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber GSMFrameDecode. 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Made the following changes per comments from Phase 2/3 review: 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1. Changed all references to bit_offset to byte_offset. 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Added input_type to the function interface and modified code 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber to check type of conversion that needs to be made. 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Modified pseudo-code to include IF2 and ETS input formats. 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Removed byte_offset from input list. Renamed speech_bits 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber to speech_bits_ptr. 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Added dec_input_format_tab.h in Include section. Modified 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pseudo-code to use correct table names. Renamed input_type to 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber input_format and speech_bits to speech_bits_ptr. 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Removed *prev_mode_ptr in the input argument list. 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Made the following changes per comments from Phase 2/3 review: 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1. Removed dec_input_format_tab.h from Include section. 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2. Changed type definition of raw_pcm_buffer in the I/O 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber definition section. 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Renamed WmfBytesPerFrame to WmfDecBytesPerFrame, and 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber If2BytesPerFrame to If2DecBytesPerFrame. 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Modified code so that the ETS testvectors could be fed directly 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber to this function. 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Changed '&' to '&&' in the setting of rx_type and mode for 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber AMR_SID < frame_type < NO_DATA case. 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Added code comments and made some code optimizations per Phase 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2/3 review comments. 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Added conditional compile around the call to GSMFrameDecode to 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber allow amrdecode.c to be used in the ETS reference console. 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "amrdecode.h" 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "cnst.h" 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "typedef.h" 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "frame.h" 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "sp_dec.h" 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "wmf_to_ets.h" 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "if2_to_ets.h" 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "frame_type_3gpp.h" 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; MACROS 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Define module specific macros here 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; DEFINES 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Include all pre-processor statements here. Include conditional 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; compile variables also. 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL FUNCTION DEFINITIONS 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Function Prototype declaration 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL STORE/BUFFER/POINTER DEFINITIONS 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Variable declaration - defined here and used outside this module 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: AMRDecode 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state_data = pointer to a structure (type void) 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frame_type = 3GPP frame type (enum Frame_Type_3GPP) 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber speech_bits_ptr = pointer to the beginning of the raw encoded speech bits 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for the current frame to be decoded (unsigned char) 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber raw_pcm_buffer = pointer to the output pcm outputs array (Word16) 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber input_format = input format used; valid values are AMR_WMF, AMR_IF2, 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber and AMR_ETS (Word16) 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber raw_pcm_buffer contains the newly decoded linear PCM speech samples 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state_data->prev_mode contains the new mode 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = address offset of the next frame to be processed or 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber error condition flag (-1) (int) 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber WmfDecBytesPerFrame = table containing the number of core AMR data bytes 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used by each codec mode for WMF input format (const 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int) 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber If2DecBytesPerFrame = table containing the number of core AMR data bytes 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used by each codec mode for IF2 input format (const 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int) 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber This function is the top level entry function to the GSM AMR Decoder library. 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber First, it checks the input format type (input_format) to determine the type 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber of de-formattting that needs to be done. If input_format is AMR_WMF, the input 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber data is in WMF (aka, non-IF2) format and the function wmf_to_ets will be 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called to convert to the ETS format (1 bit/word, where 1 word = 16 bits), 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber and byte_offset will be updated according to the contents of WmfDecBytesPerFrame 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber table. 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber If input_format is AMR_IF2, the input data is in IF2 format [1] and the 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber function if2_to_ets will be called to convert to the ETS format, and 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset will be updated according to the contents of If2DecBytesPerFrame 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber table. 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber The codec mode and receive frame type is initialized based on the incoming 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frame_type. 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber If input_format is AMR_ETS, the input data is in the ETS format. The receive 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frame type is set to the value in the first location of the buffer pointed to 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber by speech_bits_ptr. Then, the encoded speech parameters in the buffer pointed 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber to by speech_bits is copied to dec_ets_input_bfr and the type will be changed 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber from unsigned char to Word16. Lastly, if the receive frame type is not 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RX_NO_DATA, the mode is obtained from the buffer pointed to by 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber speech_bits_ptr, offset by MAX_SERIAL_SIZE+1, otherwise, the mode is set to 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the previous mode (found the in state_data->prev_mode). 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber If input_format is an unsupported format, byte_offset will be set to -1, to 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber indicate an error condition has occurred, and the function will exit. 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber If there are no errors, GSMFrameDecode is called to decode a 20 ms frame. It 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber puts the decoded linear PCM samples in the buffer pointed to by 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber raw_pcm_buffer. Then, the prev_mode field of the structure pointed to by 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state_data is updated to the current mode. 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber This function returns the new byte_offset value to indicate the address 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber offset of the next speech frame to be decoded. 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [1] "AMR Speech Codec Frame Structure", 3GPP TS 26.101 version 4.1.0 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Release 4, June 2001 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Note: AMRSID_RXTYPE_BIT_OFFSET = 35 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber AMRSID_RXMODE_BIT_OFFSET = 36 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber NUM_AMRSID_RXMODE_BITS = 3 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Set up Decoder state structure pointer 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Speech_Decode_FrameState *decoder_state 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber = (Speech_Decode_FrameState *) state_data 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Determine type of de-formatting 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Decode WMF or IF2 frames 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber IF ((input_format == AMR_RX_WMF) | (input_format == AMR_RX_IF2)) 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber IF (input_format == AMR_RX_WMF) 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Convert incoming packetized raw WMF data to ETS format 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CALL wmf_to_ets(frame_type = frame_type 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber input_ptr = speech_bits_ptr 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber output_ptr = &dec_ets_input_bfr) 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber MODIFYING(nothing) 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RETURNING(nothing) 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Address offset of the start of next frame 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = WmfDecBytesPerFrame[frame_type] 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ELSEIF (input_format == AMR_RX_IF2) 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Convert incoming packetized raw IF2 data to ETS format 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CALL if2_to_ets(frame_type = frame_type 2554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber input_ptr = speech_bits_ptr 2564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber output_ptr = &dec_ets_input_bfr) 2574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber MODIFYING(nothing) 2584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RETURNING(nothing) 2594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Address offset of the start of next frame 2614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = If2DecBytesPerFrame[frame_type] 2624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ENDIF 2644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Determine AMR codec mode and AMR RX frame type 2664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber IF (frame_type <= AMR_122) 2674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 2684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = (enum Mode) frame_type; 2694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = RX_SPEECH_GOOD; 2704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ELSEIF (frame_type == AMR_SID) 2724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 2734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Clear mode store prior to reading mode info from input buffer 2744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = 0 2754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FOR i = 0 TO NUM_AMRSID_RXMODE_BITS-1 2774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode |= (dec_ets_input_bfr[AMRSID_RXMODE_BIT_OFFSET+i] << i) 2794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ENDFOR 2814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber IF (dec_ets_input_bfr[AMRSID_RXTYPE_BIT_OFFSET] == 0) 2834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 2844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = RX_SID_FIRST 2854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ELSE 2874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = RX_SID_UPDATE 2884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ENDIF 2904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ELSEIF ((frame_type > AMR_SID) && (frame_type < NO_DATA)) 2924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 2934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Use previous mode 2944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = decoder_state->prev_mode 2954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Unsupported SID frames 2974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = RX_SPEECH_BAD; 2984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ELSE 3004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Use previous mode 3014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = decoder_state->prev_mode 3024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // No data received 3044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = RX_NO_DATA; 3054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ENDIF 3074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Decode ETS frames 3094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ELSEIF (input_format == AMR_RX_ETS) 3104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 3114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Change type of pointer to incoming raw ETS data 3124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ets_word_ptr = (Word16 *) speech_bits_ptr 3134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Get RX frame type 3154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = (enum RXFrameType) *ets_word_ptr 3164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ets_word_ptr = ets_word_ptr + 1 3174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Copy incoming raw ETS data to dec_ets_input_bfr 3194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FOR i = 0 TO MAX_SERIAL_SIZE-1 3204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber dec_ets_input_bfr[i] = *ets_word_ptr 3224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ets_word_ptr = ets_word_ptr + 1 3234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ENDFOR 3254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Get codec mode 3274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber IF (rx_type != RX_NO_DATA) 3284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 3294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = (enum Mode) *ets_word_ptr 3304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ELSE 3324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber //Use previous mode if no received data 3334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = decoder_state->prev_mode 3344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ENDIF 3364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Set up byte_offset 3384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = 2*(MAX_SERIAL_SIZE+2) 3394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ELSE 3414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Invalid format, return error code 3424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = -1 3434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ENDIF 3454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Proceed with decoding frame, if there are no errors 3474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber IF (byte_offset != -1) 3484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber THEN 3494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Decode a 20 ms frame 3504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CALL GSMFrameDecode( st = decoder_state 3514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = mode 3524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber serial = dec_ets_input_bfr, 3534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frame_type = rx_type, 3544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber synth = (Word16 *)raw_pcm_buffer); 3554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber MODIFYING (nothing) 3564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RETURNING (Nothing) 3574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Save mode for next frame 3594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber decoder_state->prev_mode = mode 3604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ENDIF 3624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RETURN (byte_offset) 3644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 3674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 3694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 3704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 3724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 3744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 3764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 3774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 3784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 3794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 3804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 3834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 3844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 3874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberWord16 AMRDecode( 3894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber void *state_data, 3904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber enum Frame_Type_3GPP frame_type, 3914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber UWord8 *speech_bits_ptr, 3924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *raw_pcm_buffer, 3934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bitstream_format input_format 3944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 3954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 3964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *ets_word_ptr; 3974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber enum Mode mode = (enum Mode)MR475; 3984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int modeStore; 3994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int tempInt; 4004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber enum RXFrameType rx_type = RX_NO_DATA; 4014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 dec_ets_input_bfr[MAX_SERIAL_SIZE]; 4024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i; 4034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 byte_offset = -1; 4044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Type cast state_data to Speech_Decode_FrameState rather than passing 4064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * that structure type to this function so the structure make up can't 4074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * be viewed from higher level functions than this. 4084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 4094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Speech_Decode_FrameState *decoder_state 4104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber = (Speech_Decode_FrameState *) state_data; 4114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Determine type of de-formatting */ 4134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* WMF or IF2 frames */ 4144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((input_format == MIME_IETF) | (input_format == IF2)) 4154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (input_format == MIME_IETF) 4174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Convert incoming packetized raw WMF data to ETS format */ 4194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber wmf_to_ets(frame_type, speech_bits_ptr, dec_ets_input_bfr); 4204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Address offset of the start of next frame */ 4224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = WmfDecBytesPerFrame[frame_type]; 4234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else /* else has to be input_format IF2 */ 4254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Convert incoming packetized raw IF2 data to ETS format */ 4274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if2_to_ets(frame_type, speech_bits_ptr, dec_ets_input_bfr); 4284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Address offset of the start of next frame */ 4304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = If2DecBytesPerFrame[frame_type]; 4314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* At this point, input data is in ETS format */ 4344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Determine AMR codec mode and AMR RX frame type */ 4354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (frame_type <= AMR_122) 4364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = (enum Mode) frame_type; 4384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = RX_SPEECH_GOOD; 4394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else if (frame_type == AMR_SID) 4414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Clear mode store prior to reading mode info from input buffer */ 4434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber modeStore = 0; 4444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < NUM_AMRSID_RXMODE_BITS; i++) 4464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tempInt = dec_ets_input_bfr[AMRSID_RXMODE_BIT_OFFSET+i] << i; 4484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber modeStore |= tempInt; 4494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = (enum Mode) modeStore; 4514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Get RX frame type */ 4534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (dec_ets_input_bfr[AMRSID_RXTYPE_BIT_OFFSET] == 0) 4544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = RX_SID_FIRST; 4564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 4584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = RX_SID_UPDATE; 4604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else if (frame_type < AMR_NO_DATA) 4634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Invalid frame_type, return error code */ 4654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = -1; /* !!! */ 4664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 4684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = decoder_state->prev_mode; 4704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 4724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * RX_NO_DATA, generate exponential decay from latest valid frame for the first 6 frames 4734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * after that, create silent frames 4744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 4754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = RX_NO_DATA; 4764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* ETS frames */ 4824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else if (input_format == ETS) 4834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Change type of pointer to incoming raw ETS data */ 4854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ets_word_ptr = (Word16 *) speech_bits_ptr; 4864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Get RX frame type */ 4884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rx_type = (enum RXFrameType) * ets_word_ptr; 4894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ets_word_ptr++; 4904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Copy incoming raw ETS data to dec_ets_input_bfr */ 4924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < MAX_SERIAL_SIZE; i++) 4934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber dec_ets_input_bfr[i] = *ets_word_ptr; 4954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ets_word_ptr++; 4964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Get codec mode */ 4994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (rx_type != RX_NO_DATA) 5004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Get mode from input bitstream */ 5024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = (enum Mode) * ets_word_ptr; 5034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 5054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Use previous mode if no received data */ 5074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = decoder_state->prev_mode; 5084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Set up byte_offset */ 5114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = 2 * (MAX_SERIAL_SIZE + 2); 5124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 5144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Invalid input format, return error code */ 5164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber byte_offset = -1; 5174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Proceed with decoding frame, if there are no errors */ 5204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (byte_offset != -1) 5214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Decode a 20 ms frame */ 5234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifndef CONSOLE_DECODER_REF 5254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Use PV version of sp_dec.c */ 5264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber GSMFrameDecode(decoder_state, mode, dec_ets_input_bfr, rx_type, 5274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber raw_pcm_buffer); 5284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#else 5304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Use ETS version of sp_dec.c */ 5314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Speech_Decode_Frame(decoder_state, mode, dec_ets_input_bfr, rx_type, 5324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber raw_pcm_buffer); 5334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 5354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Save mode for next frame */ 5374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber decoder_state->prev_mode = mode; 5384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return (byte_offset); 5414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 5424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 545