/* ------------------------------------------------------------------ * 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: ./src/sfb.c ------------------------------------------------------------------------------ REVISION HISTORY Description: created to define the scalefactor bands for all sampling rates Description: Change short to Int16 Description: Modified structure to avoid assigning addresses to constant tables. This solve linking problem when using the /ropi option (Read-only position independent) for some compilers - Eliminated redundant vector sfb_96_128. - Eliminated references to contant vector addresses in samp_rate_info Who: Date: Description: ------------------------------------------------------------------------------ INPUT AND OUTPUT DEFINITIONS Inputs: Local Stores/Buffers/Pointers Needed: Global Stores/Buffers/Pointers Needed: Outputs: Pointers and Buffers Modified: Local Stores Modified: Global Stores Modified: ------------------------------------------------------------------------------ FUNCTION DESCRIPTION This function defines the scalefactor bands for all sampling rates ------------------------------------------------------------------------------ REQUIREMENTS ------------------------------------------------------------------------------ REFERENCES (1) ISO/IEC 14496-3: 1999(E) Subpart 4 p66 (sfb tables) p111 (4.6.10) p200 (Annex 4.B.5) ------------------------------------------------------------------------------ PSEUDO-CODE ------------------------------------------------------------------------------ RESOURCES USED When the code is written for a specific target processor the the resources used should be documented below. STACK USAGE: [stack count for this module] + [variable to represent stack usage for each subroutine called] where: [stack usage variable] = stack usage for [subroutine name] (see [filename].ext) DATA MEMORY USED: x words PROGRAM MEMORY USED: x words CLOCK CYCLES: [cycle count equation for this module] + [variable used to represent cycle count for each subroutine called] where: [cycle count variable] = cycle count for [subroutine name] (see [filename].ext) ------------------------------------------------------------------------------ */ /*---------------------------------------------------------------------------- ; INCLUDES ----------------------------------------------------------------------------*/ #include "pv_audio_type_defs.h" #include "sfb.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 ----------------------------------------------------------------------------*/ const Int16 sfb_96_1024[] = { 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72, 80, 88, 96, 108, 120, 132, 144, 156, 172, 188, 212, 240, 276, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, 960, 1024 }; /* 41 scfbands */ const Int16 sfb_64_1024[] = { 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72, 80, 88, 100, 112, 124, 140, 156, 172, 192, 216, 240, 268, 304, 344, 384, 424, 464, 504, 544, 584, 624, 664, 704, 744, 784, 824, 864, 904, 944, 984, 1024 }; /* 41 scfbands 47 */ const Int16 sfb_64_128[] = { 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128 }; /* 12 scfbands */ const Int16 sfb_48_1024[] = { 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72, 80, 88, 96, 108, 120, 132, 144, 160, 176, 196, 216, 240, 264, 292, 320, 352, 384, 416, 448, 480, 512, 544, 576, 608, 640, 672, 704, 736, 768, 800, 832, 864, 896, 928, 1024 }; /* 49 scfbands*/ const Int16 sfb_48_128[] = { 4, 8, 12, 16, 20, 28, 36, 44, 56, 68, 80, 96, 112, 128 }; /* 14 scfbands */ const Int16 sfb_32_1024[] = { 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72, 80, 88, 96, 108, 120, 132, 144, 160, 176, 196, 216, 240, 264, 292, 320, 352, 384, 416, 448, 480, 512, 544, 576, 608, 640, 672, 704, 736, 768, 800, 832, 864, 896, 928, 960, 992, 1024 }; /* 51 scfbands */ const Int16 sfb_24_1024[] = { 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 52, 60, 68, 76, 84, 92, 100, 108, 116, 124, 136, 148, 160, 172, 188, 204, 220, 240, 260, 284, 308, 336, 364, 396, 432, 468, 508, 552, 600, 652, 704, 768, 832, 896, 960, 1024 }; /* 47 scfbands */ const Int16 sfb_24_128[] = { 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 64, 76, 92, 108, 128 }; /* 15 scfbands */ const Int16 sfb_16_1024[] = { 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 100, 112, 124, 136, 148, 160, 172, 184, 196, 212, 228, 244, 260, 280, 300, 320, 344, 368, 396, 424, 456, 492, 532, 572, 616, 664, 716, 772, 832, 896, 960, 1024 }; /* 43 scfbands */ const Int16 sfb_16_128[] = { 4, 8, 12, 16, 20, 24, 28, 32, 40, 48, 60, 72, 88, 108, 128 }; /* 15 scfbands */ const Int16 sfb_8_1024[] = { 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 172, 188, 204, 220, 236, 252, 268, 288, 308, 328, 348, 372, 396, 420, 448, 476, 508, 544, 580, 620, 664, 712, 764, 820, 880, 944, 1024 }; /* 40 scfbands */ const Int16 sfb_8_128[] = { 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 60, 72, 88, 108, 128 }; /* 15 scfbands */ const SR_Info samp_rate_info[12] = { /* sampling_frequency, #long sfb, #short sfb */ /* samp_rate, nsfb1024, nsfb128 */ {96000, 41, 12}, /* 96000 */ {88200, 41, 12}, /* 88200 */ {64000, 47, 12}, /* 64000 */ {48000, 49, 14}, /* 48000 */ {44100, 49, 14}, /* 44100 */ {32000, 51, 14}, /* 32000 */ {24000, 47, 15}, /* 24000 */ {22050, 47, 15}, /* 22050 */ {16000, 43, 15}, /* 16000 */ {12000, 43, 15}, /* 12000 */ {11025, 43, 15}, /* 11025 */ { 8000, 40, 15}, /* 8000 */ }; /*---------------------------------------------------------------------------- ; EXTERNAL FUNCTION REFERENCES ; Declare functions defined elsewhere and referenced in this module ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES ; Declare variables used in this module but defined elsewhere ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; FUNCTION CODE ----------------------------------------------------------------------------*/