1e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard/* 2e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** Copyright 2003-2010, VisualOn, Inc. 3e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** 4e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** Licensed under the Apache License, Version 2.0 (the "License"); 5e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** you may not use this file except in compliance with the License. 6e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** You may obtain a copy of the License at 7e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** 8e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** http://www.apache.org/licenses/LICENSE-2.0 9e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** 10e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** Unless required by applicable law or agreed to in writing, software 11e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** distributed under the License is distributed on an "AS IS" BASIS, 12e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** See the License for the specific language governing permissions and 14e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** limitations under the License. 15e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard */ 16e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard/******************************************************************************* 17e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard File: channel_map.c 18e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 19e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Content: channel mapping functions 20e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 21956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong*******************************************************************************/ 22956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 23956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong#include "channel_map.h" 24956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong#include "bitenc.h" 25956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong#include "psy_const.h" 26956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong#include "qc_data.h" 27956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 28956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dongstatic const Word16 maxChannelBits = MAXBITS_COEF; 29956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 30956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dongstatic Word16 initElement(ELEMENT_INFO* elInfo, ELEMENT_TYPE elType) 31956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong{ 32b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard Word16 error=0; 33956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 34b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elInfo->elType=elType; 35956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 36956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong switch(elInfo->elType) { 37956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 38956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong case ID_SCE: 39b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elInfo->nChannelsInEl=1; 40956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 41b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elInfo->ChannelIndex[0]=0; 42956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 43b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elInfo->instanceTag=0; 44956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong break; 45956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 46956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong case ID_CPE: 47956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 48b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elInfo->nChannelsInEl=2; 49956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 50b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elInfo->ChannelIndex[0]=0; 51b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elInfo->ChannelIndex[1]=1; 52956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 53b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elInfo->instanceTag=0; 54956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong break; 55956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 56956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong default: 57b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard error=1; 58956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 59956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 60956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong return error; 61956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong} 62956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 63956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 64956c553ab0ce72f8074ad0fda2ffd66a0305700cJames DongWord16 InitElementInfo (Word16 nChannels, ELEMENT_INFO* elInfo) 65956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong{ 66956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 error; 67b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard error = 0; 68956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 69956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong switch(nChannels) { 70956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 71b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard case 1: 72956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong initElement(elInfo, ID_SCE); 73956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong break; 74956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 75956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong case 2: 76956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong initElement(elInfo, ID_CPE); 77956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong break; 78956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 79956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong default: 80b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard error=4; 81956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 82956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 83956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong return error; 84956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong} 85956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 86956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 87956c553ab0ce72f8074ad0fda2ffd66a0305700cJames DongWord16 InitElementBits(ELEMENT_BITS *elementBits, 88956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong ELEMENT_INFO elInfo, 89956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word32 bitrateTot, 90956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 averageBitsTot, 91956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 staticBitsTot) 92956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong{ 93956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 error; 94b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard error = 0; 95956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 96956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong switch(elInfo.nChannelsInEl) { 97956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong case 1: 98b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elementBits->chBitrate = bitrateTot; 99956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong elementBits->averageBits = averageBitsTot - staticBitsTot; 100b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elementBits->maxBits = maxChannelBits; 101956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 102956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong elementBits->maxBitResBits = maxChannelBits - averageBitsTot; 103b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elementBits->maxBitResBits = elementBits->maxBitResBits - (elementBits->maxBitResBits & 7); 104b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elementBits->bitResLevel = elementBits->maxBitResBits; 105b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elementBits->relativeBits = 0x4000; /* 1.0f/2 */ 106956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong break; 107956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 108956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong case 2: 109956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong elementBits->chBitrate = bitrateTot >> 1; 110956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong elementBits->averageBits = averageBitsTot - staticBitsTot; 111956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong elementBits->maxBits = maxChannelBits << 1; 112956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 113956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong elementBits->maxBitResBits = (maxChannelBits << 1) - averageBitsTot; 114b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elementBits->maxBitResBits = elementBits->maxBitResBits - (elementBits->maxBitResBits & 7); 115b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elementBits->bitResLevel = elementBits->maxBitResBits; 116b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard elementBits->relativeBits = 0x4000; /* 1.0f/2 */ 117956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong break; 118956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 119956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong default: 120b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard error = 1; 121956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 122956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong return error; 123956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong} 124