ID3.cpp revision 5a2621a64de196cbdb9a2a50357dee1c32fcf11b
1fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber/* 2fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * Copyright (C) 2010 The Android Open Source Project 3fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * 4fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 5fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * you may not use this file except in compliance with the License. 6fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * You may obtain a copy of the License at 7fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * 8fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 9fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * 10fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * Unless required by applicable law or agreed to in writing, software 11fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 12fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * See the License for the specific language governing permissions and 14fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber * limitations under the License. 15fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber */ 16fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 17fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber//#define LOG_NDEBUG 0 18fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#define LOG_TAG "ID3" 19fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#include <utils/Log.h> 20fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 21fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#include "../include/ID3.h" 22fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 23fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#include <media/stagefright/DataSource.h> 24fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#include <media/stagefright/MediaDebug.h> 25fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#include <media/stagefright/Utils.h> 26fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#include <utils/String8.h> 275a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen#include <sys/endian.h> 28fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 29fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubernamespace android { 30fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 31fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::ID3(const sp<DataSource> &source) 32fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber : mIsValid(false), 33fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mData(NULL), 34fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mSize(0), 35fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFirstFrameOffset(0), 36fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mVersion(ID3_UNKNOWN) { 3783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mIsValid = parseV2(source); 3883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 3983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (!mIsValid) { 4083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mIsValid = parseV1(source); 4183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 42fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 43fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 44fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::~ID3() { 45fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mData) { 46fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber free(mData); 47fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mData = NULL; 48fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 49fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 50fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 51fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberbool ID3::isValid() const { 52fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return mIsValid; 53fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 54fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 55fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::Version ID3::version() const { 56fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return mVersion; 57fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 58fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 5983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huberbool ID3::parseV2(const sp<DataSource> &source) { 60fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber struct id3_header { 61fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber char id[3]; 62fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t version_major; 63fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t version_minor; 64fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t flags; 65fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t enc_size[4]; 66fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber }; 67fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 68fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id3_header header; 69fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (source->readAt( 70fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 0, &header, sizeof(header)) != (ssize_t)sizeof(header)) { 71fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 72fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 73fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 74fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (memcmp(header.id, "ID3", 3)) { 75fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 76fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 77fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 78fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.version_major == 0xff || header.version_minor == 0xff) { 79fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 80fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 81fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 82fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.version_major == 2) { 83fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.flags & 0x3f) { 84fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // We only support the 2 high bits, if any of the lower bits are 85fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // set, we cannot guarantee to understand the tag format. 86fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 87fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 88fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 89fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.flags & 0x40) { 90fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // No compression scheme has been decided yet, ignore the 91fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // tag if compression is indicated. 92fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 93fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 94fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 95fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else if (header.version_major == 3) { 96fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.flags & 0x1f) { 97fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // We only support the 3 high bits, if any of the lower bits are 98fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // set, we cannot guarantee to understand the tag format. 99fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 100fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 101fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 102fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 103fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 104fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 105fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t size = 0; 106fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber for (int32_t i = 0; i < 4; ++i) { 107fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.enc_size[i] & 0x80) { 108fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 109fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 110fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 111fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size = (size << 7) | header.enc_size[i]; 112fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 113fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 114fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mData = (uint8_t *)malloc(size); 115fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 116fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mData == NULL) { 117fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 118fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 119fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 120fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mSize = size; 121fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 122fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (source->readAt(sizeof(header), mData, mSize) != (ssize_t)mSize) { 123fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 124fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 125fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 126fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.flags & 0x80) { 12783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber LOGV("removing unsynchronization"); 128fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber removeUnsynchronization(); 129fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 130fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 131fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFirstFrameOffset = 0; 132fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.version_major == 3 && (header.flags & 0x40)) { 133fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // Version 2.3 has an optional extended header. 134fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 135fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mSize < 4) { 13683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 13783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 13883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 139fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 140fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 141fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 142fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t extendedHeaderSize = U32_AT(&mData[0]) + 4; 143fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 144fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (extendedHeaderSize > mSize) { 14583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 14683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 14783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 148fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 149fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 150fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 151fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFirstFrameOffset = extendedHeaderSize; 152fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 153fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint16_t extendedFlags = 0; 154fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (extendedHeaderSize >= 6) { 155fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber extendedFlags = U16_AT(&mData[4]); 156fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 157fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (extendedHeaderSize >= 10) { 158fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t paddingSize = U32_AT(&mData[6]); 159fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 160fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mFirstFrameOffset + paddingSize > mSize) { 16183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 16283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 16383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 164fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 165fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 166fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 167fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mSize -= paddingSize; 168fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 169fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 170fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (extendedFlags & 0x8000) { 17183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber LOGV("have crc"); 172fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 173fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 174fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 175fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 176fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.version_major == 2) { 177fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mVersion = ID3_V2_2; 178fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 179fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber CHECK_EQ(header.version_major, 3); 180fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mVersion = ID3_V2_3; 181fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 182fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 183fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return true; 184fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 185fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 186fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubervoid ID3::removeUnsynchronization() { 187fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber for (size_t i = 0; i + 1 < mSize; ++i) { 188fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mData[i] == 0xff && mData[i + 1] == 0x00) { 189fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber memmove(&mData[i + 1], &mData[i + 2], mSize - i - 2); 190fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber --mSize; 191fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 192fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 193fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 194fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 195fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::Iterator::Iterator(const ID3 &parent, const char *id) 196fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber : mParent(parent), 197fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mID(NULL), 198fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mOffset(mParent.mFirstFrameOffset), 199fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameData(NULL), 200fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameSize(0) { 201fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (id) { 202fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mID = strdup(id); 203fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 204fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 205fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber findFrame(); 206fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 207fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 208fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::Iterator::~Iterator() { 209fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mID) { 210fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber free(mID); 211fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mID = NULL; 212fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 213fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 214fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 215fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberbool ID3::Iterator::done() const { 216fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return mFrameData == NULL; 217fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 218fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 219fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubervoid ID3::Iterator::next() { 220fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mFrameData == NULL) { 221fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 222fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 223fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 224fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mOffset += mFrameSize; 225fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 226fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber findFrame(); 227fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 228fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 229fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubervoid ID3::Iterator::getID(String8 *id) const { 230fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id->setTo(""); 231fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 232fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mFrameData == NULL) { 233fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 234fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 235fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 236fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mParent.mVersion == ID3_V2_2) { 237fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id->setTo((const char *)&mParent.mData[mOffset], 3); 23883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else if (mParent.mVersion == ID3_V2_3) { 239fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id->setTo((const char *)&mParent.mData[mOffset], 4); 24083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 24183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(mParent.mVersion == ID3_V1 || mParent.mVersion == ID3_V1_1); 24283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 24383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber switch (mOffset) { 24483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 3: 24583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TT2"); 24683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 24783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 33: 24883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TP1"); 24983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 25083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 63: 25183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TAL"); 25283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 25383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 93: 25483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TYE"); 25583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 25683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 97: 25783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("COM"); 25883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 25983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 126: 26083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TRK"); 26183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 26283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 127: 26383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TCO"); 26483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 26583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber default: 26683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(!"should not be here."); 26783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 26883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 269fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 270fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 271fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 272fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberstatic void convertISO8859ToString8( 273fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber const uint8_t *data, size_t size, 274fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber String8 *s) { 275fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t utf8len = 0; 276fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber for (size_t i = 0; i < size; ++i) { 277fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (data[i] < 0x80) { 278fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber ++utf8len; 279fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 280fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber utf8len += 2; 281fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 282fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 283fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 284fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (utf8len == size) { 285fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // Only ASCII characters present. 286fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 287fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber s->setTo((const char *)data, size); 288fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 289fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 290fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 291fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber char *tmp = new char[utf8len]; 292fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber char *ptr = tmp; 293fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber for (size_t i = 0; i < size; ++i) { 294fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (data[i] < 0x80) { 295fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *ptr++ = data[i]; 296fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else if (data[i] < 0xc0) { 297fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *ptr++ = 0xc2; 298fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *ptr++ = data[i]; 299fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 300fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *ptr++ = 0xc3; 301fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *ptr++ = data[i] - 64; 302fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 303fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 304fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 305fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber s->setTo(tmp, utf8len); 306fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 307fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber delete[] tmp; 308fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber tmp = NULL; 309fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 310fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 311fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubervoid ID3::Iterator::getString(String8 *id) const { 312fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id->setTo(""); 313fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 314fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mFrameData == NULL) { 315fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 316fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 317fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 31883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mParent.mVersion == ID3_V1 || mParent.mVersion == ID3_V1_1) { 31983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mOffset == 126 || mOffset == 127) { 32083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber // Special treatment for the track number and genre. 32183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber char tmp[16]; 32283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber sprintf(tmp, "%d", (int)*mFrameData); 32383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 32483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo(tmp); 32583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return; 32683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 32783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 32883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo((const char *)mFrameData, mFrameSize); 32983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return; 33083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 33183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 332fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t n = mFrameSize - getHeaderLength() - 1; 333fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 334fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (*mFrameData == 0x00) { 335fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // ISO 8859-1 336fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber convertISO8859ToString8(mFrameData + 1, n, id); 337fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 338fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // UCS-2 33908e7eb983fcb9860a574e964ff905f75aab88d2fAndreas Huber // API wants number of characters, not number of bytes... 3405a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen int len = n / 2; 3415a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen const char16_t *framedata = (const char16_t *) (mFrameData + 1); 3425a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen char16_t *framedatacopy = NULL; 3435a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen if (*framedata == 0xfffe) { 3445a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen // endianness marker doesn't match host endianness, convert 3455a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen framedatacopy = new char16_t[len]; 3465a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen for (int i = 0; i < len; i++) { 3475a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen framedatacopy[i] = swap16(framedata[i]); 3485a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen } 3495a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen framedata = framedatacopy; 3505a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen } 3515a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen // If the string starts with an endianness marker, skip it 3525a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen if (*framedata == 0xfeff) { 3535a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen framedata++; 3545a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen len--; 3555a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen } 3565a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen id->setTo(framedata, len); 3575a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen if (framedatacopy != NULL) { 3585a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen delete[] framedatacopy; 3595a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen } 360fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 361fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 362fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 363fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberconst uint8_t *ID3::Iterator::getData(size_t *length) const { 364fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *length = 0; 365fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 366fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mFrameData == NULL) { 367fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return NULL; 368fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 369fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 370fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *length = mFrameSize - getHeaderLength(); 371fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 372fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return mFrameData; 373fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 374fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 375fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubersize_t ID3::Iterator::getHeaderLength() const { 376fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mParent.mVersion == ID3_V2_2) { 377fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return 6; 37883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else if (mParent.mVersion == ID3_V2_3) { 379fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return 10; 38083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 38183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(mParent.mVersion == ID3_V1 || mParent.mVersion == ID3_V1_1); 38283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return 0; 383fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 384fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 385fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 386fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubervoid ID3::Iterator::findFrame() { 387fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber for (;;) { 388fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameData = NULL; 389fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameSize = 0; 390fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 391fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mParent.mVersion == ID3_V2_2) { 392fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mOffset + 6 > mParent.mSize) { 393fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 394fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 395fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 396fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!memcmp(&mParent.mData[mOffset], "\0\0\0", 3)) { 397fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 398fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 399fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 400fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameSize = 401fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber (mParent.mData[mOffset + 3] << 16) 402fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber | (mParent.mData[mOffset + 4] << 8) 403fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber | mParent.mData[mOffset + 5]; 404fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 405fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameSize += 6; 406fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 407fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mOffset + mFrameSize > mParent.mSize) { 408fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber LOGV("partial frame at offset %d (size = %d, bytes-remaining = %d)", 409fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mOffset, mFrameSize, mParent.mSize - mOffset - 6); 410fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 411fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 412fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 413fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameData = &mParent.mData[mOffset + 6]; 414fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 415fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!mID) { 416fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber break; 417fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 418fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 419fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber char id[4]; 420fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber memcpy(id, &mParent.mData[mOffset], 3); 421fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id[3] = '\0'; 422fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 423fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!strcmp(id, mID)) { 424fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber break; 425fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 42683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else if (mParent.mVersion == ID3_V2_3) { 427fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mOffset + 10 > mParent.mSize) { 428fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 429fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 430fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 431fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!memcmp(&mParent.mData[mOffset], "\0\0\0\0", 4)) { 432fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 433fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 434fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 435fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameSize = 10 + U32_AT(&mParent.mData[mOffset + 4]); 436fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 437fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mOffset + mFrameSize > mParent.mSize) { 438fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber LOGV("partial frame at offset %d (size = %d, bytes-remaining = %d)", 439fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mOffset, mFrameSize, mParent.mSize - mOffset - 10); 440fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 441fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 442fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 443fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameData = &mParent.mData[mOffset + 10]; 444fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 445fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!mID) { 446fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber break; 447fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 448fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 449fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber char id[5]; 450fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber memcpy(id, &mParent.mData[mOffset], 4); 451fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id[4] = '\0'; 452fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 453fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!strcmp(id, mID)) { 454fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber break; 455fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 45683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 45783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(mParent.mVersion == ID3_V1 || mParent.mVersion == ID3_V1_1); 45883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 45983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mOffset >= mParent.mSize) { 46083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return; 46183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 46283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 46383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameData = &mParent.mData[mOffset]; 46483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 46583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber switch (mOffset) { 46683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 3: 46783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 33: 46883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 63: 46983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 30; 47083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 47183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 93: 47283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 4; 47383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 47483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 97: 47583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mParent.mVersion == ID3_V1) { 47683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 30; 47783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 47883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 29; 47983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 48083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 48183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 126: 48283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 1; 48383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 48483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 127: 48583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 1; 48683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 48783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber default: 48883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(!"Should not be here, invalid offset."); 48983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 49083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 49183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 49283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (!mID) { 49383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 49483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 49583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 49683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber String8 id; 49783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber getID(&id); 49883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 49983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (id == mID) { 50083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 50183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 502fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 503fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 504fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mOffset += mFrameSize; 505fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 506fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 507fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 508fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberstatic size_t StringSize(const uint8_t *start, uint8_t encoding) { 509fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (encoding== 0x00) { 510fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // ISO 8859-1 511fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return strlen((const char *)start) + 1; 512fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 513fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 514fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // UCS-2 515fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t n = 0; 516fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber while (start[n] != '\0' || start[n + 1] != '\0') { 517fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber n += 2; 518fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 519fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 520fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return n; 521fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 522fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 523fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberconst void * 524fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::getAlbumArt(size_t *length, String8 *mime) const { 525fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *length = 0; 526fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mime->setTo(""); 527fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 528fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber Iterator it(*this, mVersion == ID3_V2_3 ? "APIC" : "PIC"); 529fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 530fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber while (!it.done()) { 531fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t size; 532fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber const uint8_t *data = it.getData(&size); 533fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 534fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mVersion == ID3_V2_3) { 535fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t encoding = data[0]; 536fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mime->setTo((const char *)&data[1]); 537fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t mimeLen = strlen((const char *)&data[1]) + 1; 538fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 539fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t picType = data[1 + mimeLen]; 540fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#if 0 541fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (picType != 0x03) { 542fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // Front Cover Art 543fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber it.next(); 544fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber continue; 545fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 546fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#endif 547fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 548fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t descLen = StringSize(&data[2 + mimeLen], encoding); 549fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 550fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *length = size - 2 - mimeLen - descLen; 551fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 552fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return &data[2 + mimeLen + descLen]; 553fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 554fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t encoding = data[0]; 555fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 556fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!memcmp(&data[1], "PNG", 3)) { 557fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mime->setTo("image/png"); 558fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else if (!memcmp(&data[1], "JPG", 3)) { 559fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mime->setTo("image/jpeg"); 560fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else if (!memcmp(&data[1], "-->", 3)) { 561fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mime->setTo("text/plain"); 562fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 563fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return NULL; 564fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 565fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 566fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#if 0 567fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t picType = data[4]; 568fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (picType != 0x03) { 569fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // Front Cover Art 570fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber it.next(); 571fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber continue; 572fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 573fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#endif 574fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 575fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t descLen = StringSize(&data[5], encoding); 576fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 577fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *length = size - 5 - descLen; 578fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 579fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return &data[5 + descLen]; 580fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 581fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 582fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 583fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return NULL; 584fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 585fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 58683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huberbool ID3::parseV1(const sp<DataSource> &source) { 58783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber const size_t V1_TAG_SIZE = 128; 58883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 58983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber off_t size; 59083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (source->getSize(&size) != OK || size < (off_t)V1_TAG_SIZE) { 59183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return false; 59283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 59383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 59483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = (uint8_t *)malloc(V1_TAG_SIZE); 59583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (source->readAt(size - V1_TAG_SIZE, mData, V1_TAG_SIZE) 59683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber != (ssize_t)V1_TAG_SIZE) { 59783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 59883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 59983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 60083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return false; 60183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 60283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 60383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (memcmp("TAG", mData, 3)) { 60483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 60583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 60683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 60783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return false; 60883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 60983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 61083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mSize = V1_TAG_SIZE; 61183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFirstFrameOffset = 3; 61283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 61383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mData[V1_TAG_SIZE - 3] != 0) { 61483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mVersion = ID3_V1; 61583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 61683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mVersion = ID3_V1_1; 61783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 61883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 61983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return true; 62083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber} 621fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 622fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} // namespace android 623