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Diffstat (limited to 'media/libstagefright/codecs/amrnb/dec/src/amrdecode.cpp')
| -rw-r--r-- | media/libstagefright/codecs/amrnb/dec/src/amrdecode.cpp | 544 |
1 files changed, 0 insertions, 544 deletions
diff --git a/media/libstagefright/codecs/amrnb/dec/src/amrdecode.cpp b/media/libstagefright/codecs/amrnb/dec/src/amrdecode.cpp deleted file mode 100644 index 873d7af..0000000 --- a/media/libstagefright/codecs/amrnb/dec/src/amrdecode.cpp +++ /dev/null @@ -1,544 +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 26.073 - 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. -****************************************************************************************/ -/* ------------------------------------------------------------------------------- - - - Pathname: ./audio/gsm-amr/c/src/amrdecode.c - - Date: 05/23/2001 ------------------------------------------------------------------------------- - REVISION HISTORY - - Description: AMRDecode now doesn't call getbits() or put_header_in(). - It also now obtains a new bit_offset value from a constant - rather than from the returned value of getbits(). - - Description: AMRDecode now returns byte_offset rather than bit_offset, - so the program can access the next frame that is byte - aligned rather than packed without padding. - - Description: The structure types Speech_Decode_FrameState are now - passed into amrdecode( ) using void pointers, so that - higher level functions don't need to know anything about - this structure type. - - Description: Changed input argument list. Added code to handle incoming DTX - frames, and added call to wmf_to_ets function prior to calling - GSMFrameDecode. - - Description: Made the following changes per comments from Phase 2/3 review: - 1. Changed all references to bit_offset to byte_offset. - - Description: Added input_type to the function interface and modified code - to check type of conversion that needs to be made. - - Description: Modified pseudo-code to include IF2 and ETS input formats. - Removed byte_offset from input list. Renamed speech_bits - to speech_bits_ptr. - - Description: Added dec_input_format_tab.h in Include section. Modified - pseudo-code to use correct table names. Renamed input_type to - input_format and speech_bits to speech_bits_ptr. - - Description: Removed *prev_mode_ptr in the input argument list. - - Description: Made the following changes per comments from Phase 2/3 review: - 1. Removed dec_input_format_tab.h from Include section. - 2. Changed type definition of raw_pcm_buffer in the I/O - definition section. - - Description: Renamed WmfBytesPerFrame to WmfDecBytesPerFrame, and - If2BytesPerFrame to If2DecBytesPerFrame. - - Description: Modified code so that the ETS testvectors could be fed directly - to this function. - - Description: Changed '&' to '&&' in the setting of rx_type and mode for - AMR_SID < frame_type < NO_DATA case. - - Description: Added code comments and made some code optimizations per Phase - 2/3 review comments. - - Description: Added conditional compile around the call to GSMFrameDecode to - allow amrdecode.c to be used in the ETS reference console. - - Description: - ------------------------------------------------------------------------------- -*/ - -/*---------------------------------------------------------------------------- -; INCLUDES -----------------------------------------------------------------------------*/ -#include "amrdecode.h" -#include "cnst.h" -#include "typedef.h" -#include "frame.h" -#include "sp_dec.h" -#include "wmf_to_ets.h" -#include "if2_to_ets.h" -#include "frame_type_3gpp.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 -----------------------------------------------------------------------------*/ - -/* ------------------------------------------------------------------------------- - FUNCTION NAME: AMRDecode ------------------------------------------------------------------------------- - INPUT AND OUTPUT DEFINITIONS - - Inputs: - state_data = pointer to a structure (type void) - - frame_type = 3GPP frame type (enum Frame_Type_3GPP) - - speech_bits_ptr = pointer to the beginning of the raw encoded speech bits - for the current frame to be decoded (unsigned char) - - raw_pcm_buffer = pointer to the output pcm outputs array (Word16) - - input_format = input format used; valid values are AMR_WMF, AMR_IF2, - and AMR_ETS (Word16) - - Outputs: - raw_pcm_buffer contains the newly decoded linear PCM speech samples - state_data->prev_mode contains the new mode - - Returns: - byte_offset = address offset of the next frame to be processed or - error condition flag (-1) (int) - - Global Variables Used: - WmfDecBytesPerFrame = table containing the number of core AMR data bytes - used by each codec mode for WMF input format (const - int) - - If2DecBytesPerFrame = table containing the number of core AMR data bytes - used by each codec mode for IF2 input format (const - int) - - Local Variables Needed: - None - ------------------------------------------------------------------------------- - FUNCTION DESCRIPTION - - This function is the top level entry function to the GSM AMR Decoder library. - - First, it checks the input format type (input_format) to determine the type - of de-formattting that needs to be done. If input_format is AMR_WMF, the input - data is in WMF (aka, non-IF2) format and the function wmf_to_ets will be - called to convert to the ETS format (1 bit/word, where 1 word = 16 bits), - and byte_offset will be updated according to the contents of WmfDecBytesPerFrame - table. - - If input_format is AMR_IF2, the input data is in IF2 format [1] and the - function if2_to_ets will be called to convert to the ETS format, and - byte_offset will be updated according to the contents of If2DecBytesPerFrame - table. - - The codec mode and receive frame type is initialized based on the incoming - frame_type. - - If input_format is AMR_ETS, the input data is in the ETS format. The receive - frame type is set to the value in the first location of the buffer pointed to - by speech_bits_ptr. Then, the encoded speech parameters in the buffer pointed - to by speech_bits is copied to dec_ets_input_bfr and the type will be changed - from unsigned char to Word16. Lastly, if the receive frame type is not - RX_NO_DATA, the mode is obtained from the buffer pointed to by - speech_bits_ptr, offset by MAX_SERIAL_SIZE+1, otherwise, the mode is set to - the previous mode (found the in state_data->prev_mode). - - If input_format is an unsupported format, byte_offset will be set to -1, to - indicate an error condition has occurred, and the function will exit. - - If there are no errors, GSMFrameDecode is called to decode a 20 ms frame. It - puts the decoded linear PCM samples in the buffer pointed to by - raw_pcm_buffer. Then, the prev_mode field of the structure pointed to by - state_data is updated to the current mode. - - This function returns the new byte_offset value to indicate the address - offset of the next speech frame to be decoded. - ------------------------------------------------------------------------------- - REQUIREMENTS - - None - ------------------------------------------------------------------------------- - REFERENCES - - [1] "AMR Speech Codec Frame Structure", 3GPP TS 26.101 version 4.1.0 - Release 4, June 2001 - ------------------------------------------------------------------------------- - PSEUDO-CODE - - Note: AMRSID_RXTYPE_BIT_OFFSET = 35 - AMRSID_RXMODE_BIT_OFFSET = 36 - NUM_AMRSID_RXMODE_BITS = 3 - - - // Set up Decoder state structure pointer - Speech_Decode_FrameState *decoder_state - = (Speech_Decode_FrameState *) state_data - - // Determine type of de-formatting - - // Decode WMF or IF2 frames - IF ((input_format == AMR_RX_WMF) | (input_format == AMR_RX_IF2)) - THEN - IF (input_format == AMR_RX_WMF) - THEN - // Convert incoming packetized raw WMF data to ETS format - CALL wmf_to_ets(frame_type = frame_type - input_ptr = speech_bits_ptr - output_ptr = &dec_ets_input_bfr) - MODIFYING(nothing) - RETURNING(nothing) - - // Address offset of the start of next frame - byte_offset = WmfDecBytesPerFrame[frame_type] - - ELSEIF (input_format == AMR_RX_IF2) - THEN - // Convert incoming packetized raw IF2 data to ETS format - CALL if2_to_ets(frame_type = frame_type - input_ptr = speech_bits_ptr - output_ptr = &dec_ets_input_bfr) - MODIFYING(nothing) - RETURNING(nothing) - - // Address offset of the start of next frame - byte_offset = If2DecBytesPerFrame[frame_type] - - ENDIF - - // Determine AMR codec mode and AMR RX frame type - IF (frame_type <= AMR_122) - THEN - mode = (enum Mode) frame_type; - rx_type = RX_SPEECH_GOOD; - - ELSEIF (frame_type == AMR_SID) - THEN - // Clear mode store prior to reading mode info from input buffer - mode = 0 - - FOR i = 0 TO NUM_AMRSID_RXMODE_BITS-1 - - mode |= (dec_ets_input_bfr[AMRSID_RXMODE_BIT_OFFSET+i] << i) - - ENDFOR - - IF (dec_ets_input_bfr[AMRSID_RXTYPE_BIT_OFFSET] == 0) - THEN - rx_type = RX_SID_FIRST - - ELSE - rx_type = RX_SID_UPDATE - - ENDIF - - ELSEIF ((frame_type > AMR_SID) && (frame_type < NO_DATA)) - THEN - // Use previous mode - mode = decoder_state->prev_mode - - // Unsupported SID frames - rx_type = RX_SPEECH_BAD; - - ELSE - // Use previous mode - mode = decoder_state->prev_mode - - // No data received - rx_type = RX_NO_DATA; - - ENDIF - - // Decode ETS frames - ELSEIF (input_format == AMR_RX_ETS) - THEN - // Change type of pointer to incoming raw ETS data - ets_word_ptr = (Word16 *) speech_bits_ptr - - // Get RX frame type - rx_type = (enum RXFrameType) *ets_word_ptr - ets_word_ptr = ets_word_ptr + 1 - - // Copy incoming raw ETS data to dec_ets_input_bfr - FOR i = 0 TO MAX_SERIAL_SIZE-1 - - dec_ets_input_bfr[i] = *ets_word_ptr - ets_word_ptr = ets_word_ptr + 1 - - ENDFOR - - // Get codec mode - IF (rx_type != RX_NO_DATA) - THEN - mode = (enum Mode) *ets_word_ptr - - ELSE - //Use previous mode if no received data - mode = decoder_state->prev_mode - - ENDIF - - // Set up byte_offset - byte_offset = 2*(MAX_SERIAL_SIZE+2) - - ELSE - // Invalid format, return error code - byte_offset = -1 - - ENDIF - - // Proceed with decoding frame, if there are no errors - IF (byte_offset != -1) - THEN - // Decode a 20 ms frame - CALL GSMFrameDecode( st = decoder_state - mode = mode - serial = dec_ets_input_bfr, - frame_type = rx_type, - synth = (Word16 *)raw_pcm_buffer); - MODIFYING (nothing) - RETURNING (Nothing) - - // Save mode for next frame - decoder_state->prev_mode = mode - - ENDIF - - RETURN (byte_offset) - ------------------------------------------------------------------------------- - 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 AMRDecode( - void *state_data, - enum Frame_Type_3GPP frame_type, - UWord8 *speech_bits_ptr, - Word16 *raw_pcm_buffer, - bitstream_format input_format -) -{ - Word16 *ets_word_ptr; - enum Mode mode = (enum Mode)MR475; - int modeStore; - int tempInt; - enum RXFrameType rx_type = RX_NO_DATA; - Word16 dec_ets_input_bfr[MAX_SERIAL_SIZE]; - Word16 i; - Word16 byte_offset = -1; - - /* Type cast state_data to Speech_Decode_FrameState rather than passing - * that structure type to this function so the structure make up can't - * be viewed from higher level functions than this. - */ - Speech_Decode_FrameState *decoder_state - = (Speech_Decode_FrameState *) state_data; - - /* Determine type of de-formatting */ - /* WMF or IF2 frames */ - if ((input_format == MIME_IETF) | (input_format == IF2)) - { - if (input_format == MIME_IETF) - { - /* Convert incoming packetized raw WMF data to ETS format */ - wmf_to_ets(frame_type, speech_bits_ptr, dec_ets_input_bfr); - - /* Address offset of the start of next frame */ - byte_offset = WmfDecBytesPerFrame[frame_type]; - } - else /* else has to be input_format IF2 */ - { - /* Convert incoming packetized raw IF2 data to ETS format */ - if2_to_ets(frame_type, speech_bits_ptr, dec_ets_input_bfr); - - /* Address offset of the start of next frame */ - byte_offset = If2DecBytesPerFrame[frame_type]; - } - - /* At this point, input data is in ETS format */ - /* Determine AMR codec mode and AMR RX frame type */ - if (frame_type <= AMR_122) - { - mode = (enum Mode) frame_type; - rx_type = RX_SPEECH_GOOD; - } - else if (frame_type == AMR_SID) - { - /* Clear mode store prior to reading mode info from input buffer */ - modeStore = 0; - - for (i = 0; i < NUM_AMRSID_RXMODE_BITS; i++) - { - tempInt = dec_ets_input_bfr[AMRSID_RXMODE_BIT_OFFSET+i] << i; - modeStore |= tempInt; - } - mode = (enum Mode) modeStore; - - /* Get RX frame type */ - if (dec_ets_input_bfr[AMRSID_RXTYPE_BIT_OFFSET] == 0) - { - rx_type = RX_SID_FIRST; - } - else - { - rx_type = RX_SID_UPDATE; - } - } - else if (frame_type < AMR_NO_DATA) - { - /* Invalid frame_type, return error code */ - byte_offset = -1; /* !!! */ - } - else - { - mode = decoder_state->prev_mode; - - /* - * RX_NO_DATA, generate exponential decay from latest valid frame for the first 6 frames - * after that, create silent frames - */ - rx_type = RX_NO_DATA; - - } - - } - - /* ETS frames */ - else if (input_format == ETS) - { - /* Change type of pointer to incoming raw ETS data */ - ets_word_ptr = (Word16 *) speech_bits_ptr; - - /* Get RX frame type */ - rx_type = (enum RXFrameType) * ets_word_ptr; - ets_word_ptr++; - - /* Copy incoming raw ETS data to dec_ets_input_bfr */ - for (i = 0; i < MAX_SERIAL_SIZE; i++) - { - dec_ets_input_bfr[i] = *ets_word_ptr; - ets_word_ptr++; - } - - /* Get codec mode */ - if (rx_type != RX_NO_DATA) - { - /* Get mode from input bitstream */ - mode = (enum Mode) * ets_word_ptr; - } - else - { - /* Use previous mode if no received data */ - mode = decoder_state->prev_mode; - } - - /* Set up byte_offset */ - byte_offset = 2 * (MAX_SERIAL_SIZE + 2); - } - else - { - /* Invalid input format, return error code */ - byte_offset = -1; - } - - /* Proceed with decoding frame, if there are no errors */ - if (byte_offset != -1) - { - /* Decode a 20 ms frame */ - -#ifndef CONSOLE_DECODER_REF - /* Use PV version of sp_dec.c */ - GSMFrameDecode(decoder_state, mode, dec_ets_input_bfr, rx_type, - raw_pcm_buffer); - -#else - /* Use ETS version of sp_dec.c */ - Speech_Decode_Frame(decoder_state, mode, dec_ets_input_bfr, rx_type, - raw_pcm_buffer); - -#endif - - /* Save mode for next frame */ - decoder_state->prev_mode = mode; - } - - return (byte_offset); -} - - - |