| /* ------------------------------------------------------------------ |
| * 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. |
| * ------------------------------------------------------------------- |
| */ |
| /* |
| |
| Pathname: window_block_fxp.h |
| |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Description: |
| modified function definition: Time_data from Int to Int32 |
| change wnd_shape from structure to passing parameters |
| delete definition of wnd_shape1, not needed. |
| |
| Description: Modified based on unit test comments |
| |
| Description: Change copyright, add () around constants. |
| |
| Description: |
| changed Long_Window_fxp and Short _Window_fxp tables definition, from |
| "const UInt16 *" to "const UInt16 * const" to avoid global variable |
| definition. |
| |
| Description: Updated function trans4m_freq_2_time_fxp definition |
| |
| Description: Modified function interface to add output_buffer |
| |
| |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| |
| Header file for window and block switch |
| |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| (1) ISO/IEC 13818-7 Part 7: Advanced Audo Coding (AAC) |
| |
| |
| (2) MPEG-2 NBC Audio Decoder |
| "This software module was originally developed by AT&T, Dolby |
| Laboratories, Fraunhofer Gesellschaft IIS in the course of development |
| of the MPEG-2 NBC/MPEG-4 Audio standard ISO/IEC 13818-7, 14496-1,2 and |
| 3. This software module is an implementation of a part of one or more |
| MPEG-2 NBC/MPEG-4 Audio tools as specified by the MPEG-2 NBC/MPEG-4 |
| Audio standard. ISO/IEC gives users of the MPEG-2 NBC/MPEG-4 Audio |
| standards free license to this software module or modifications thereof |
| for use in hardware or software products claiming conformance to the |
| MPEG-2 NBC/MPEG-4 Audio standards. Those intending to use this software |
| module in hardware or software products are advised that this use may |
| infringe existing patents. The original developer of this software |
| module and his/her company, the subsequent editors and their companies, |
| and ISO/IEC have no liability for use of this software module or |
| modifications thereof in an implementation. Copyright is not released |
| for non MPEG-2 NBC/MPEG-4 Audio conforming products.The original |
| developer retains full right to use the code for his/her own purpose, |
| assign or donate the code to a third party and to inhibit third party |
| from using the code for non MPEG-2 NBC/MPEG-4 Audio conforming products. |
| This copyright notice must be included in all copies or derivative |
| works." |
| Copyright(c)1996. |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| /*---------------------------------------------------------------------------- |
| ; CONTINUE ONLY IF NOT ALREADY DEFINED |
| ----------------------------------------------------------------------------*/ |
| #ifndef WINDOW_BLOCK_FXP_H |
| #define WINDOW_BLOCK_FXP_H |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| #include "pv_audio_type_defs.h" |
| #include "e_window_shape.h" |
| #include "e_window_sequence.h" |
| |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES |
| ; Include all pre-processor statements here. |
| ----------------------------------------------------------------------------*/ |
| #define LONG_WINDOW (1024) |
| #define SHORT_WINDOW (128) |
| |
| #define HALF_LONG_WINDOW (LONG_WINDOW>>1) |
| #define HALF_SHORT_WINDOW (SHORT_WINDOW>>1) |
| |
| #define NUM_SHORT_WINDOWS (8) |
| #define LONG_WINDOW_m_1 (LONG_WINDOW-1) |
| #define SHORT_WINDOW_m_1 (SHORT_WINDOW-1) |
| |
| /* |
| * Limits for window sequences, they are used to build |
| * each long window, they are defined in the standards |
| */ |
| #define W_L_START_1 ((3*LONG_WINDOW - SHORT_WINDOW)>>1) |
| #define W_L_START_2 ((3*LONG_WINDOW + SHORT_WINDOW)>>1) |
| #define W_L_STOP_1 ((LONG_WINDOW - SHORT_WINDOW)>>1) |
| #define W_L_STOP_2 ((LONG_WINDOW + SHORT_WINDOW)>>1) |
| |
| |
| #define LONG_BLOCK1 (2*LONG_WINDOW) |
| #define SHORT_BLOCK1 (2*SHORT_WINDOW) |
| |
| |
| #define SCALING 10 |
| #define ROUNDING (1<<(SCALING-1)) |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL VARIABLES REFERENCES |
| ; Declare variables used in this module but defined elsewhere |
| ----------------------------------------------------------------------------*/ |
| extern const Int16 Short_Window_KBD_fxp[ SHORT_WINDOW]; |
| extern const Int16 Long_Window_KBD_fxp[ LONG_WINDOW]; |
| extern const Int16 Short_Window_sine_fxp[ SHORT_WINDOW]; |
| extern const Int16 Long_Window_sine_fxp[ LONG_WINDOW]; |
| |
| extern const Int16 * const Long_Window_fxp[]; |
| extern const Int16 * const Short_Window_fxp[]; |
| |
| /*---------------------------------------------------------------------------- |
| ; SIMPLE TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; ENUMERATED TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; STRUCTURES TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; GLOBAL FUNCTION DEFINITIONS |
| ; Function Prototype declaration |
| ----------------------------------------------------------------------------*/ |
| |
| void trans4m_freq_2_time_fxp( |
| Int32 Frequency_data[], |
| Int32 Time_data[], |
| #ifdef AAC_PLUS |
| Int32 Output_buffer[], |
| #else |
| Int16 Output_buffer[], |
| #endif |
| WINDOW_SEQUENCE wnd_seq, |
| Int wnd_shape_prev_bk, |
| Int wnd_shape_this_bk, |
| Int Q_format, |
| Int32 abs_max_per_window[], |
| Int32 freq_2_time_buffer[] , |
| Int16 *Interleave_output |
| ); |
| |
| |
| |
| void trans4m_freq_2_time_fxp_1( |
| Int32 Frequency_data[], |
| Int32 Time_data[], |
| Int16 Output_buffer[], |
| WINDOW_SEQUENCE wnd_seq, |
| Int wnd_shape_prev_bk, |
| Int wnd_shape_this_bk, |
| Int Q_format, |
| Int32 abs_max_per_window[], |
| Int32 freq_2_time_buffer[] |
| ); |
| |
| |
| void trans4m_freq_2_time_fxp_2( |
| Int32 Frequency_data[], |
| Int32 Time_data[], |
| WINDOW_SEQUENCE wnd_seq, |
| Int wnd_shape_prev_bk, |
| Int wnd_shape_this_bk, |
| Int Q_format, |
| Int32 abs_max_per_window[], |
| Int32 freq_2_time_buffer[] , |
| Int16 *Interleave_output |
| ); |
| |
| void trans4m_time_2_freq_fxp( |
| Int32 Time2Freq_data[], |
| WINDOW_SEQUENCE wnd_seq, |
| Int wnd_shape_prev_bk, |
| Int wnd_shape_this_bk, |
| Int *pQ_format, |
| Int32 mem_4_in_place_FFT[]); |
| |
| /*---------------------------------------------------------------------------- |
| ; END |
| ----------------------------------------------------------------------------*/ |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* WINDOW_BLOCK_FXP_H */ |
| |
