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Diffstat (limited to 'media/libstagefright/codecs/amrnb/enc/src/amrencode.cpp')
| -rw-r--r-- | media/libstagefright/codecs/amrnb/enc/src/amrencode.cpp | 897 |
1 files changed, 897 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrnb/enc/src/amrencode.cpp b/media/libstagefright/codecs/amrnb/enc/src/amrencode.cpp new file mode 100644 index 0000000..d07c846 --- /dev/null +++ b/media/libstagefright/codecs/amrnb/enc/src/amrencode.cpp @@ -0,0 +1,897 @@ +/* ------------------------------------------------------------------ + * 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 26.073 + ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec + Available from http://www.3gpp.org + +(C) 2004, 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: /audio/gsm-amr/c/src/amrencode.c + Functions: AMREncode + AMREncodeInit + AMREncodeReset + AMREncodeExit + + Date: 01/26/2002 + +------------------------------------------------------------------------------ + REVISION HISTORY + + Description: Added input_type in the parameter list and updated code to + check the type of output formatting to use. + + Description: Corrected typo in Include section. + + Description: Added code to support ETS format. + + Description: Modified file by adding the return of the number of encoder + frame bytes. + + Description: Added call to sid_sync function to support TX_NO_DATA case. + Added SID type and mode info to ets_output_bfr for ETS SID + frames. Created AMREncodeInit, AMREncodeReset, and AMREncodeExit + functions. + + Description: Modified design of handling of ETS outputs such that the ETS + testvectors could be compared directly to the output of this + function. + + Description: Added conditional compile around calls to AMR Encoder interface + functions to allow amrencode.c to be used in the ETS reference + console. + + Description: Replaced "int" and/or "char" with OSCL defined types. + + Description: + +------------------------------------------------------------------------------ + MODULE DESCRIPTION + + This file contains the functions required to initialize, reset, exit, and + invoke the ETS 3GPP GSM AMR encoder. + +------------------------------------------------------------------------------ +*/ + + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ +#include "cnst.h" +#include "mode.h" +#include "frame_type_3gpp.h" +#include "typedef.h" + +#include "amrencode.h" +#include "ets_to_if2.h" +#include "ets_to_wmf.h" +#include "sid_sync.h" +#include "sp_enc.h" + +/*---------------------------------------------------------------------------- +; MACROS [optional] +; [Define module specific macros here] +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; DEFINES [optional] +; [Include all pre-processor statements here. Include conditional +; compile variables also.] +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL FUNCTION DEFINITIONS +; [List function prototypes here] +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL VARIABLE DEFINITIONS +; [Variable declaration - defined here and used outside this module] +----------------------------------------------------------------------------*/ + + +/* +------------------------------------------------------------------------------ + FUNCTION NAME: AMREncodeInit +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + Inputs: + pEncStructure = pointer containing the pointer to a structure used by + the encoder (void) + pSidSyncStructure = pointer containing the pointer to a structure used for + SID synchronization (void) + dtx_enable = flag to turn off or turn on DTX (Flag) + + Outputs: + None + + Returns: + init_status = 0, if initialization was successful; -1, otherwise (int) + + Global Variables Used: + None + + Local Variables Needed: + speech_encoder_state = pointer to encoder frame structure + (Speech_Encode_FrameState) + sid_state = pointer to SID sync structure (sid_syncState) + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + This function initializes the GSM AMR Encoder library by calling + GSMInitEncode and sid_sync_init. If initialization was successful, + init_status is set to zero, otherwise, it is set to -1. + +------------------------------------------------------------------------------ + REQUIREMENTS + + None + +------------------------------------------------------------------------------ + REFERENCES + + None + +------------------------------------------------------------------------------ + PSEUDO-CODE + + // Initialize GSM AMR Encoder + CALL GSMInitEncode(state_data = &pEncStructure, + dtx = dtx_enable, + id = char_id ) + MODIFYING(nothing) + RETURNING(return_value = enc_init_status) + + // Initialize SID synchronization + CALL sid_sync_init(state = &pSidSyncStructure) + MODIFYING(nothing) + RETURNING(return_value = sid_sync_init_status) + + IF ((enc_init_status != 0) || (sid_sync_init != 0)) + THEN + init_status = -1 + + ENDIF + + MODIFY(nothing) + RETURN(init_status) + +------------------------------------------------------------------------------ + RESOURCES USED [optional] + + When the code is written for a specific target processor the + the resources used should be documented below. + + HEAP MEMORY USED: x bytes + + STACK MEMORY USED: x bytes + + CLOCK CYCLES: (cycle count equation for this function) + (variable + used to represent cycle count for each subroutine + called) + where: (cycle count variable) = cycle count for [subroutine + name] + +------------------------------------------------------------------------------ + CAUTION [optional] + [State any special notes, constraints or cautions for users of this function] + +------------------------------------------------------------------------------ +*/ +Word16 AMREncodeInit( + void **pEncStructure, + void **pSidSyncStructure, + Flag dtx_enable) +{ + Word16 enc_init_status = 0; + Word16 sid_sync_init_status = 0; + Word16 init_status = 0; + + /* Initialize GSM AMR Encoder */ +#ifdef CONSOLE_ENCODER_REF + /* Change to original ETS input types */ + Speech_Encode_FrameState **speech_encode_frame = + (Speech_Encode_FrameState **)(pEncStructure); + + sid_syncState **sid_sync_state = (sid_syncState **)(pSidSyncStructure); + + /* Use ETS version of sp_enc.c */ + enc_init_status = Speech_Encode_Frame_init(speech_encode_frame, + dtx_enable, + (Word8*)"encoder"); + + /* Initialize SID synchronization */ + sid_sync_init_status = sid_sync_init(sid_sync_state); + +#else + /* Use PV version of sp_enc.c */ + enc_init_status = GSMInitEncode(pEncStructure, + dtx_enable, + (Word8*)"encoder"); + + /* Initialize SID synchronization */ + sid_sync_init_status = sid_sync_init(pSidSyncStructure); + + +#endif + + if ((enc_init_status != 0) || (sid_sync_init_status != 0)) + { + init_status = -1; + } + + return(init_status); +} + + +/****************************************************************************/ + +/* +------------------------------------------------------------------------------ + FUNCTION NAME: AMREncodeReset +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + Inputs: + pEncStructure = pointer to a structure used by the encoder (void) + pSidSyncStructure = pointer to a structure used for SID synchronization + (void) + + Outputs: + None + + Returns: + reset_status = 0, if reset was successful; -1, otherwise (int) + + Global Variables Used: + None + + Local Variables Needed: + speech_encoder_state = pointer to encoder frame structure + (Speech_Encode_FrameState) + sid_state = pointer to SID sync structure (sid_syncState) + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + This function resets the state memory used by the Encoder and SID sync + function. If reset was successful, reset_status is set to zero, otherwise, + it is set to -1. + +------------------------------------------------------------------------------ + REQUIREMENTS + + None + +------------------------------------------------------------------------------ + REFERENCES + + None + +------------------------------------------------------------------------------ + PSEUDO-CODE + + // Reset GSM AMR Encoder + CALL Speech_Encode_Frame_reset(state_data = pEncStructure) + MODIFYING(nothing) + RETURNING(return_value = enc_reset_status) + + // Reset SID synchronization + CALL sid_sync_reset(state = pSidSyncStructure) + MODIFYING(nothing) + RETURNING(return_value = sid_sync_reset_status) + + IF ((enc_reset_status != 0) || (sid_sync_reset_status != 0)) + THEN + reset_status = -1 + + ENDIF + + MODIFY(nothing) + RETURN(reset_status) + +------------------------------------------------------------------------------ + RESOURCES USED [optional] + + When the code is written for a specific target processor the + the resources used should be documented below. + + HEAP MEMORY USED: x bytes + + STACK MEMORY USED: x bytes + + CLOCK CYCLES: (cycle count equation for this function) + (variable + used to represent cycle count for each subroutine + called) + where: (cycle count variable) = cycle count for [subroutine + name] + +------------------------------------------------------------------------------ + CAUTION [optional] + [State any special notes, constraints or cautions for users of this function] + +------------------------------------------------------------------------------ +*/ +Word16 AMREncodeReset( + void *pEncStructure, + void *pSidSyncStructure) +{ + Word16 enc_reset_status = 0; + Word16 sid_sync_reset_status = 0; + Word16 reset_status = 0; + + /* Reset GSM AMR Encoder */ + enc_reset_status = Speech_Encode_Frame_reset(pEncStructure); + + + /* Reset SID synchronization */ + sid_sync_reset_status = sid_sync_reset(pSidSyncStructure); + + if ((enc_reset_status != 0) || (sid_sync_reset_status != 0)) + { + reset_status = -1; + } + + return(reset_status); +} + + +/****************************************************************************/ + +/* +------------------------------------------------------------------------------ + FUNCTION NAME: AMREncodeExit +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + Inputs: + pEncStructure = pointer containing the pointer to a structure used by + the encoder (void) + pSidSyncStructure = pointer containing the pointer to a structure used for + SID synchronization (void) + + Outputs: + None + + Returns: + None + + Global Variables Used: + None + + Local Variables Needed: + speech_encoder_state = pointer to encoder frame structure + (Speech_Encode_FrameState) + sid_state = pointer to SID sync structure (sid_syncState) + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + This function frees up the state memory used by the Encoder and SID + synchronization function. + +------------------------------------------------------------------------------ + REQUIREMENTS + + None + +------------------------------------------------------------------------------ + REFERENCES + + None + +------------------------------------------------------------------------------ + PSEUDO-CODE + + // Exit GSM AMR Encoder + CALL GSMEncodeFrameExit(state_data = &pEncStructure) + MODIFYING(nothing) + RETURNING(nothing) + + // Exit SID synchronization + CALL sid_sync_exit(state = &pSidSyncStructure) + MODIFYING(nothing) + RETURNING(nothing) + + MODIFY(nothing) + RETURN(nothing) + +------------------------------------------------------------------------------ + RESOURCES USED [optional] + + When the code is written for a specific target processor the + the resources used should be documented below. + + HEAP MEMORY USED: x bytes + + STACK MEMORY USED: x bytes + + CLOCK CYCLES: (cycle count equation for this function) + (variable + used to represent cycle count for each subroutine + called) + where: (cycle count variable) = cycle count for [subroutine + name] + +------------------------------------------------------------------------------ + CAUTION [optional] + [State any special notes, constraints or cautions for users of this function] + +------------------------------------------------------------------------------ +*/ +void AMREncodeExit( + void **pEncStructure, + void **pSidSyncStructure) +{ + /* Exit GSM AMR Encoder */ + +#ifdef CONSOLE_ENCODER_REF + /* Change to original ETS input types */ + Speech_Encode_FrameState ** speech_encode_frame = + (Speech_Encode_FrameState **)(pEncStructure); + + sid_syncState ** sid_sync_state = (sid_syncState **)(pSidSyncStructure); + + /* Use ETS version of sp_enc.c */ + Speech_Encode_Frame_exit(speech_encode_frame); + + + /* Exit SID synchronization */ + sid_sync_exit(sid_sync_state); + +#else + + /* Use PV version of sp_enc.c */ + GSMEncodeFrameExit(pEncStructure); + + /* Exit SID synchronization */ + sid_sync_exit(pSidSyncStructure); + +#endif + + return; +} + + +/****************************************************************************/ + +/* +------------------------------------------------------------------------------ + FUNCTION NAME: AMREncode +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + Inputs: + pEncState = pointer to encoder state structure (void) + pSidSyncState = pointer to SID sync state structure (void) + mode = codec mode (enum Mode) + pEncInput = pointer to the input speech samples (Word16) + pEncOutput = pointer to the encoded bit stream (unsigned char) + p3gpp_frame_type = pointer to the 3GPP frame type (enum Frame_Type_3GPP) + output_format = output format type (Word16); valid values are AMR_WMF, + AMR_IF2, and AMR_ETS + + Outputs: + pEncOutput buffer contains to the newly encoded bit stream + p3gpp_frame_type store contains the new 3GPP frame type + + Returns: + num_enc_bytes = number of encoded bytes for a particular + mode or -1, if an error occurred (int) + + Global Variables Used: + WmfEncBytesPerFrame = table containing the number of encoder frame + data bytes per codec mode for WMF output + format (const int) + If2EncBytesPerFrame = table containing the number of encoder frame + data bytes per codec mode for IF2 output + format (const int) + + Local Variables Needed: + None + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + This function is the top-level entry point to the GSM AMR Encoder library. + + The following describes the encoding process for WMF or IF2 formatted output + data. This functions calls GSMEncodeFrame to encode one frame's worth of + input speech samples, and returns the newly encoded bit stream in the buffer + pointed to by pEncOutput.Then the function sid_sync is called to determine + the transmit frame type. If the transmit frame type is TX_SPEECH_GOOD or + TX_SID_FIRST or TX_SID_UPDATE, p3gpp_frame_type will be set to the encoder + used mode. For SID frames, the SID type information and mode information are + added to the encoded parameter bitstream according to the SID frame format + described in [1]. If the transmit frame type is TX_NO_DATA, the store + pointed to by p3gpp_frame_type will be set to NO_DATA. Then the output + format type (output_format) will be checked to determine the format of the + encoded data. + + If output_format is AMR_TX_WMF, the function ets_to_wmf will be called to + convert from ETS format (1 bit/word, where 1 word = 16 bits, information in + least significant bit) to WMF (aka, non-IF2). The WMF format stores the data + in octets. The least significant 4 bits of the first octet contains the 3GPP + frame type information and the most significant 4 bits are zeroed out. The + succeeding octets contain the packed encoded speech bits. The total number of + WMF bytes encoded is obtained from WmfEncBytesPerFrame table and returned via + num_enc_bytes. + + If output_format is AMR_TX_IF2, the function if2_to_ets will be called to + convert from ETS format to IF2 [1]. The IF2 format stores the data in octets. + The least significant nibble of the first octet contains the 3GPP frame type + and the most significant nibble contains the first 4 encoded speech bits. The + suceeding octets contain the packed encoded speech bits. The total number of + IF2 bytes encoded is obtained from If2EncBytesPerFrame table and returned via + num_enc_bytes. + + If output_format is AMR_TX_ETS, GSMFrameEncode is called to generate the + encoded speech parameters, then, sid_sync is called to determine the transmit + frame type. If the transmit frame type is not TX_NO_DATA, then the transmit + frame type information is saved in the first location of the ets_output_bfr, + followed by the encoded speech parameters. The codec mode information is + stored immediately after the MAX_SERIAL_SIZE encoded speech parameters. If + the transmit frame type is TX_NO_DATA, the transmit frame type, encoded + speech parameters, and codec mode are stored in the same order as before + in ets_output_bfr. However, for the no data case, the codec mode is set to + -1. + + After all the required information is generated, the 16-bit data generated + by the Encoder (in ets_output_bfr) is copied to the buffer pointed to by + pEncOutput in the little endian configuration, i.e., least significant byte, + followed by most significant byte. The num_enc_bytes is set to + 2*(MAX_SERIAL_SIZE+2). + + If output_format is invalid, this function flags the error and sets + num_enc_bytes to -1. + +------------------------------------------------------------------------------ + REQUIREMENTS + + None + +------------------------------------------------------------------------------ + REFERENCES + + [1] "AMR Speech Codec Frame Structure", 3GPP TS 26.101 version 4.1.0 + Release 4, June 2001 + +------------------------------------------------------------------------------ + PSEUDO-CODE + + IF ((output_format == AMR_TX_WMF) | (output_format == AMR_TX_IF2)) + THEN + // Encode one speech frame (20 ms) + CALL GSMEncodeFrame( state_data = pEncState, + mode = mode, + new_speech = pEncInput, + serial = &ets_output_bfr[0], + usedMode = &usedMode ) + MODIFYING(nothing) + RETURNING(return_value = 0) + + // Determine transmit frame type + CALL sid_sync(st = pSidSyncState, + mode = usedMode + tx_frame_type = &tx_frame_type) + MODIFYING(nothing) + RETURNING(nothing) + + IF (tx_frame_type != TX_NO_DATA) + THEN + // There is data to transmit + *p3gpp_frame_type = (enum Frame_Type_3GPP) usedMode + + // Add SID type and mode info for SID frames + IF (*p3gpp_frame_type == AMR_SID) + THEN + // Add SID type to encoder output buffer + IF (tx_frame_type == TX_SID_FIRST) + THEN + ets_output_bfr[AMRSID_TXTYPE_BIT_OFFSET] &= 0x7f + + ELSEIF (tx_frame_type == TX_SID_UPDATE ) + THEN + ets_output_bfr[AMRSID_TXTYPE_BIT_OFFSET] |= 0x80 + + ENDIF + + // Add mode information bits + FOR i = 0 TO NUM_AMRSID_TXMODE_BITS-1 + + ets_output_bfr[AMRSID_TXMODE_BIT_OFFSET+i] = (mode>>i)&&0x0001 + + ENDFOR + + ENDIF + + ELSE + // There is no data to transmit + *p3gpp_frame_type = NO_DATA + + ENDIF + + // Determine the output format to use + IF (output_format == AMR_TX_WMF) + THEN + // Change output data format to WMF + CALL ets_to_wmf( frame_type_3gpp = *p3gpp_frame_type, + ets_input_ptr = &ets_output_bfr[0], + wmf_output_ptr = pEncOutput ) + MODIFYING(nothing) + RETURNING(nothing) + + // Set up the number of encoded WMF bytes + num_enc_bytes = WmfEncBytesPerFrame[(int) *p3gpp_frame_type] + + ELSEIF (output_format == AMR_TX_IF2) + THEN + // Change output data format to IF2 + CALL ets_to_if2( frame_type_3gpp = *p3gpp_frame_type, + ets_input_ptr = &ets_output_bfr[0], + if2_output_ptr = pEncOutput ) + MODIFYING(nothing) + RETURNING(nothing) + + // Set up the number of encoded IF2 bytes + num_enc_bytes = If2EncBytesPerFrame[(int) *p3gpp_frame_type] + + ENDIF + + ELSEIF (output_format = AMR_TX_ETS) + THEN + // Encode one speech frame (20 ms) + CALL GSMEncodeFrame( state_data = pEncState, + mode = mode, + new_speech = pEncInput, + serial = &ets_output_bfr[1], + usedMode = &usedMode ) + MODIFYING(nothing) + RETURNING(return_value = 0) + + // Save used mode + *p3gpp_frame_type = (enum Frame_Type_3GPP) usedMode + + // Determine transmit frame type + CALL sid_sync(st = pSidSyncState, + mode = usedMode + tx_frame_type = &tx_frame_type) + MODIFYING(nothing) + RETURNING(nothing) + + // Put TX frame type in output buffer + ets_output_bfr[0] = tx_frame_type + + // Put mode information after the encoded speech parameters + IF (tx_frame_type != TX_NO_DATA) + THEN + ets_output_bfr[MAX_SERIAL_SIZE+1] = mode + + ELSE + ets_output_bfr[MAX_SERIAL_SIZE+1] = -1 + + ENDIF + + // Copy output of encoder to pEncOutput buffer + ets_output_ptr = (unsigned char *) &ets_output_bfr[0] + + // Copy 16-bit data in 8-bit chunks using Little Endian configuration + FOR i = 0 TO (2*(MAX_SERIAL_SIZE+6))-1 + + *(pEncOutput+i) = *ets_output_ptr + ets_output_ptr = ets_output_ptr + 1 + + ENDFOR + + // Set up number of encoded bytes + num_enc_bytes = 2*(MAX_SERIAL_SIZE+6) + + ELSE + // Invalid output_format, set up error code + num_enc_bytes = -1 + + ENDIF + + MODIFY (nothing) + RETURN (num_enc_bytes) + +------------------------------------------------------------------------------ + RESOURCES USED [optional] + + When the code is written for a specific target processor the + the resources used should be documented below. + + HEAP MEMORY USED: x bytes + + STACK MEMORY USED: x bytes + + CLOCK CYCLES: (cycle count equation for this function) + (variable + used to represent cycle count for each subroutine + called) + where: (cycle count variable) = cycle count for [subroutine + name] + +------------------------------------------------------------------------------ + CAUTION [optional] + [State any special notes, constraints or cautions for users of this function] + +------------------------------------------------------------------------------ +*/ +Word16 AMREncode( + void *pEncState, + void *pSidSyncState, + enum Mode mode, + Word16 *pEncInput, + UWord8 *pEncOutput, + enum Frame_Type_3GPP *p3gpp_frame_type, + Word16 output_format +) +{ + Word16 ets_output_bfr[MAX_SERIAL_SIZE+2]; + UWord8 *ets_output_ptr; + Word16 num_enc_bytes = -1; + Word16 i; + enum TXFrameType tx_frame_type; + enum Mode usedMode = MR475; + + /* Encode WMF or IF2 frames */ + if ((output_format == AMR_TX_WMF) | (output_format == AMR_TX_IF2)) + { + /* Encode one speech frame (20 ms) */ + +#ifndef CONSOLE_ENCODER_REF + + /* Use PV version of sp_enc.c */ + GSMEncodeFrame(pEncState, mode, pEncInput, ets_output_bfr, &usedMode); + +#else + /* Use ETS version of sp_enc.c */ + Speech_Encode_Frame(pEncState, mode, pEncInput, ets_output_bfr, &usedMode); + +#endif + + /* Determine transmit frame type */ + sid_sync(pSidSyncState, usedMode, &tx_frame_type); + + if (tx_frame_type != TX_NO_DATA) + { + /* There is data to transmit */ + *p3gpp_frame_type = (enum Frame_Type_3GPP) usedMode; + + /* Add SID type and mode info for SID frames */ + if (*p3gpp_frame_type == AMR_SID) + { + /* Add SID type to encoder output buffer */ + if (tx_frame_type == TX_SID_FIRST) + { + ets_output_bfr[AMRSID_TXTYPE_BIT_OFFSET] &= 0x0000; + } + else if (tx_frame_type == TX_SID_UPDATE) + { + ets_output_bfr[AMRSID_TXTYPE_BIT_OFFSET] |= 0x0001; + } + + /* Add mode information bits */ + for (i = 0; i < NUM_AMRSID_TXMODE_BITS; i++) + { + ets_output_bfr[AMRSID_TXMODE_BIT_OFFSET+i] = + (mode >> i) & 0x0001; + } + } + } + else + { + /* This is no data to transmit */ + *p3gpp_frame_type = (enum Frame_Type_3GPP)AMR_NO_DATA; + } + + /* At this point, output format is ETS */ + /* Determine the output format to use */ + if (output_format == AMR_TX_WMF) + { + /* Change output data format to WMF */ + ets_to_wmf(*p3gpp_frame_type, ets_output_bfr, pEncOutput); + + /* Set up the number of encoded WMF bytes */ + num_enc_bytes = WmfEncBytesPerFrame[(Word16) *p3gpp_frame_type]; + + } + else if (output_format == AMR_TX_IF2) + { + /* Change output data format to IF2 */ + ets_to_if2(*p3gpp_frame_type, ets_output_bfr, pEncOutput); + + /* Set up the number of encoded IF2 bytes */ + num_enc_bytes = If2EncBytesPerFrame[(Word16) *p3gpp_frame_type]; + + } + } + + /* Encode ETS frames */ + else if (output_format == AMR_TX_ETS) + { + /* Encode one speech frame (20 ms) */ + +#ifndef CONSOLE_ENCODER_REF + + /* Use PV version of sp_enc.c */ + GSMEncodeFrame(pEncState, mode, pEncInput, &ets_output_bfr[1], &usedMode); + +#else + /* Use ETS version of sp_enc.c */ + Speech_Encode_Frame(pEncState, mode, pEncInput, &ets_output_bfr[1], &usedMode); + +#endif + + /* Save used mode */ + *p3gpp_frame_type = (enum Frame_Type_3GPP) usedMode; + + /* Determine transmit frame type */ + sid_sync(pSidSyncState, usedMode, &tx_frame_type); + + /* Put TX frame type in output buffer */ + ets_output_bfr[0] = tx_frame_type; + + /* Put mode information after the encoded speech parameters */ + if (tx_frame_type != TX_NO_DATA) + { + ets_output_bfr[1+MAX_SERIAL_SIZE] = (Word16) mode; + } + else + { + ets_output_bfr[1+MAX_SERIAL_SIZE] = -1; + } + + /* Copy output of encoder to pEncOutput buffer */ + ets_output_ptr = (UWord8 *) & ets_output_bfr[0]; + + /* Copy 16-bit data in 8-bit chunks */ + /* using Little Endian configuration */ + for (i = 0; i < 2*(MAX_SERIAL_SIZE + 2); i++) + { + *(pEncOutput + i) = *ets_output_ptr; + ets_output_ptr += 1; + } + + /* Set up the number of encoded bytes */ + num_enc_bytes = 2 * (MAX_SERIAL_SIZE + 2); + + } + + /* Invalid frame format */ + else + { + /* Invalid output format, set up error code */ + num_enc_bytes = -1; + } + + return(num_enc_bytes); +} + + |