ID3.cpp revision 607612858f3afad1ade51a098aafa2a41523b5f7
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 23f1d5aa162c02a16b7195a43a9bcea4d592600ac4James Dong#include <media/stagefright/foundation/ADebug.h> 24607612858f3afad1ade51a098aafa2a41523b5f7Dongwon Kang#include <media/stagefright/foundation/ByteUtils.h> 25fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#include <media/stagefright/DataSource.h> 26fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#include <utils/String8.h> 27569e7f1b1444194d1aca5a0b23de154565ba12daMarco Nelissen#include <byteswap.h> 28fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 29fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubernamespace android { 30fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 3165997f022fa3f557ba864ecc99a1aa33df54c2dbAndreas Huberstatic const size_t kMaxMetadataSize = 3 * 1024 * 1024; 3265997f022fa3f557ba864ecc99a1aa33df54c2dbAndreas Huber 3314f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huberstruct MemorySource : public DataSource { 3414f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber MemorySource(const uint8_t *data, size_t size) 3514f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber : mData(data), 3614f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mSize(size) { 3714f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber } 3814f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 3914f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber virtual status_t initCheck() const { 4014f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber return OK; 4114f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber } 4214f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 4314f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber virtual ssize_t readAt(off64_t offset, void *data, size_t size) { 44b4a7a2df4c28c3f32b5d877b54831d2cc5d78f81Colin Cross off64_t available = (offset >= (off64_t)mSize) ? 0ll : mSize - offset; 4514f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 46b4a7a2df4c28c3f32b5d877b54831d2cc5d78f81Colin Cross size_t copy = (available > (off64_t)size) ? size : available; 4714f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber memcpy(data, mData + offset, copy); 4814f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 4914f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber return copy; 5014f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber } 5114f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 5214f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huberprivate: 5314f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber const uint8_t *mData; 5414f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber size_t mSize; 5514f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 5614f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber DISALLOW_EVIL_CONSTRUCTORS(MemorySource); 5714f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber}; 5814f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 59328abde67f57c026ac44e927f9244c40832499c8Oscar RydhéID3::ID3(const sp<DataSource> &source, bool ignoreV1, off64_t offset) 60fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber : mIsValid(false), 61fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mData(NULL), 62fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mSize(0), 63fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFirstFrameOffset(0), 6414f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mVersion(ID3_UNKNOWN), 6514f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mRawSize(0) { 66328abde67f57c026ac44e927f9244c40832499c8Oscar Rydhé mIsValid = parseV2(source, offset); 6714f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 6814f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber if (!mIsValid && !ignoreV1) { 6914f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mIsValid = parseV1(source); 7014f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber } 7114f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber} 7214f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 7314f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas HuberID3::ID3(const uint8_t *data, size_t size, bool ignoreV1) 7414f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber : mIsValid(false), 7514f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mData(NULL), 7614f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mSize(0), 7714f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mFirstFrameOffset(0), 7814f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mVersion(ID3_UNKNOWN), 7914f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mRawSize(0) { 80c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick sp<MemorySource> source = new (std::nothrow) MemorySource(data, size); 81c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick 82c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick if (source == NULL) 83c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick return; 8414f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber 85328abde67f57c026ac44e927f9244c40832499c8Oscar Rydhé mIsValid = parseV2(source, 0); 8683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 87ffd6ffc5429c45577fd8e9f8fa90e79bb91b8a84Dylan Powers if (!mIsValid && !ignoreV1) { 8883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mIsValid = parseV1(source); 8983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 90fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 91fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 92fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::~ID3() { 93fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mData) { 94fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber free(mData); 95fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mData = NULL; 96fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 97fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 98fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 99fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberbool ID3::isValid() const { 100fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return mIsValid; 101fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 102fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 103fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::Version ID3::version() const { 104fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return mVersion; 105fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 106fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 107bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber// static 108bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huberbool ID3::ParseSyncsafeInteger(const uint8_t encoded[4], size_t *x) { 109bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber *x = 0; 110bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber for (int32_t i = 0; i < 4; ++i) { 111bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (encoded[i] & 0x80) { 112bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber return false; 113bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 114bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 115bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber *x = ((*x) << 7) | encoded[i]; 116bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 117bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 118bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber return true; 119bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber} 120bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 121328abde67f57c026ac44e927f9244c40832499c8Oscar Rydhébool ID3::parseV2(const sp<DataSource> &source, off64_t offset) { 122bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huberstruct id3_header { 123bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber char id[3]; 124bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber uint8_t version_major; 125bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber uint8_t version_minor; 126bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber uint8_t flags; 127bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber uint8_t enc_size[4]; 128fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber }; 129fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 130fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id3_header header; 131fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (source->readAt( 132328abde67f57c026ac44e927f9244c40832499c8Oscar Rydhé offset, &header, sizeof(header)) != (ssize_t)sizeof(header)) { 133fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 134fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 135fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 136fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (memcmp(header.id, "ID3", 3)) { 137fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 138fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 139fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 140fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.version_major == 0xff || header.version_minor == 0xff) { 141fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 142fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 143fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 144fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.version_major == 2) { 145fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.flags & 0x3f) { 146fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // We only support the 2 high bits, if any of the lower bits are 147fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // set, we cannot guarantee to understand the tag format. 148fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 149fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 150fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 151fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.flags & 0x40) { 152fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // No compression scheme has been decided yet, ignore the 153fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // tag if compression is indicated. 154fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 155fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 156fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 157fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else if (header.version_major == 3) { 158fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.flags & 0x1f) { 159fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // We only support the 3 high bits, if any of the lower bits are 160fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // set, we cannot guarantee to understand the tag format. 161fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 162fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 163bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } else if (header.version_major == 4) { 164bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (header.flags & 0x0f) { 165bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber // The lower 4 bits are undefined in this spec. 166bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber return false; 167bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 168fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 169fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 170fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 171fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 172bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber size_t size; 173bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (!ParseSyncsafeInteger(header.enc_size, &size)) { 174bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber return false; 175fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 176fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 17765997f022fa3f557ba864ecc99a1aa33df54c2dbAndreas Huber if (size > kMaxMetadataSize) { 178b4a7a2df4c28c3f32b5d877b54831d2cc5d78f81Colin Cross ALOGE("skipping huge ID3 metadata of size %zu", size); 17965997f022fa3f557ba864ecc99a1aa33df54c2dbAndreas Huber return false; 18065997f022fa3f557ba864ecc99a1aa33df54c2dbAndreas Huber } 18165997f022fa3f557ba864ecc99a1aa33df54c2dbAndreas Huber 182fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mData = (uint8_t *)malloc(size); 183fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 184fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mData == NULL) { 185fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 186fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 187fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 188fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mSize = size; 18914f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber mRawSize = mSize + sizeof(header); 190fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 191328abde67f57c026ac44e927f9244c40832499c8Oscar Rydhé if (source->readAt(offset + sizeof(header), mData, mSize) != (ssize_t)mSize) { 192ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber free(mData); 193ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber mData = NULL; 194ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 195fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 196fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 197fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 198ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber if (header.version_major == 4) { 199428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber void *copy = malloc(size); 200b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia if (copy == NULL) { 201b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia free(mData); 202b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia mData = NULL; 203b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia ALOGE("b/24623447, no more memory"); 204b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia return false; 205b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia } 206b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia 207428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber memcpy(copy, mData, size); 208428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber 209428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber bool success = removeUnsynchronizationV2_4(false /* iTunesHack */); 210428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber if (!success) { 211428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber memcpy(mData, copy, size); 212428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber mSize = size; 213428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber 214428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber success = removeUnsynchronizationV2_4(true /* iTunesHack */); 215428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber 216428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber if (success) { 2173856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("Had to apply the iTunes hack to parse this ID3 tag"); 218428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber } 219428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber } 220428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber 221428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber free(copy); 222428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber copy = NULL; 223428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber 224428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber if (!success) { 225ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber free(mData); 226ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber mData = NULL; 227ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 228ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber return false; 229ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 230ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } else if (header.flags & 0x80) { 2313856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("removing unsynchronization"); 232ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 233fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber removeUnsynchronization(); 234fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 235fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 236fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFirstFrameOffset = 0; 237fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.version_major == 3 && (header.flags & 0x40)) { 238fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // Version 2.3 has an optional extended header. 239fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 240fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mSize < 4) { 24183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 24283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 24383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 244fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 245fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 246fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 247b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia size_t extendedHeaderSize = U32_AT(&mData[0]); 248b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia if (extendedHeaderSize > SIZE_MAX - 4) { 249b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia free(mData); 250b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia mData = NULL; 251b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia ALOGE("b/24623447, extendedHeaderSize is too large"); 252b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia return false; 253b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia } 254b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia extendedHeaderSize += 4; 255fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 256fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (extendedHeaderSize > mSize) { 25783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 25883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 25983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 260fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 261fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 262fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 263fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFirstFrameOffset = extendedHeaderSize; 264fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 265fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint16_t extendedFlags = 0; 266fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (extendedHeaderSize >= 6) { 267fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber extendedFlags = U16_AT(&mData[4]); 268fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 269fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (extendedHeaderSize >= 10) { 270fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t paddingSize = U32_AT(&mData[6]); 271fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 272b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia if (paddingSize > SIZE_MAX - mFirstFrameOffset) { 273b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia ALOGE("b/24623447, paddingSize is too large"); 274b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia } 275b3694ff5a5bcecd4b6cedca156f6effb55bbf4caWei Jia if (paddingSize > mSize - mFirstFrameOffset) { 27683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 27783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 27883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 279fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return false; 280fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 281fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 282fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mSize -= paddingSize; 283fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 284fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 285fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (extendedFlags & 0x8000) { 2863856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("have crc"); 287fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 288fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 289bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } else if (header.version_major == 4 && (header.flags & 0x40)) { 290bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber // Version 2.4 has an optional extended header, that's different 291bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber // from Version 2.3's... 292bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 293bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (mSize < 4) { 294bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber free(mData); 295bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber mData = NULL; 296bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 297bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber return false; 298bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 299bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 300bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber size_t ext_size; 301bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (!ParseSyncsafeInteger(mData, &ext_size)) { 302bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber free(mData); 303bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber mData = NULL; 304bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 305bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber return false; 306bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 307bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 308bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (ext_size < 6 || ext_size > mSize) { 309bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber free(mData); 310bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber mData = NULL; 311bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 312bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber return false; 313bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 314bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 315bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber mFirstFrameOffset = ext_size; 316fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 317fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 318fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (header.version_major == 2) { 319fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mVersion = ID3_V2_2; 320bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } else if (header.version_major == 3) { 321fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mVersion = ID3_V2_3; 322bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } else { 323bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber CHECK_EQ(header.version_major, 4); 324bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber mVersion = ID3_V2_4; 325fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 326fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 327fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return true; 328fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 329fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 330fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubervoid ID3::removeUnsynchronization() { 331fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber for (size_t i = 0; i + 1 < mSize; ++i) { 332fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mData[i] == 0xff && mData[i + 1] == 0x00) { 333fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber memmove(&mData[i + 1], &mData[i + 2], mSize - i - 2); 334fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber --mSize; 335fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 336fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 337fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 338fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 339ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huberstatic void WriteSyncsafeInteger(uint8_t *dst, size_t x) { 340ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber for (size_t i = 0; i < 4; ++i) { 341ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber dst[3 - i] = (x & 0x7f); 342ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber x >>= 7; 343ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 344ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber} 345ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 346428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huberbool ID3::removeUnsynchronizationV2_4(bool iTunesHack) { 347ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber size_t oldSize = mSize; 348ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 349ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber size_t offset = 0; 35009da86913ca97d7a818a8917b6601527e5e18a24Wei Jia while (mSize >= 10 && offset <= mSize - 10) { 351ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber if (!memcmp(&mData[offset], "\0\0\0\0", 4)) { 352ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber break; 353ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 354ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 355ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber size_t dataSize; 356428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber if (iTunesHack) { 357428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber dataSize = U32_AT(&mData[offset + 4]); 358428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber } else if (!ParseSyncsafeInteger(&mData[offset + 4], &dataSize)) { 359ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber return false; 360ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 361ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 36209da86913ca97d7a818a8917b6601527e5e18a24Wei Jia if (dataSize > mSize - 10 - offset) { 363ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber return false; 364ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 365ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 366ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber uint16_t flags = U16_AT(&mData[offset + 8]); 367ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber uint16_t prevFlags = flags; 368ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 369ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber if (flags & 1) { 370ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber // Strip data length indicator 371ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 372c37f7f6fa0cb7f55cdc5b2d4ccbf2c87c3bc6c3bNeel Mehta if (mSize < 14 || mSize - 14 < offset || dataSize < 4) { 37309da86913ca97d7a818a8917b6601527e5e18a24Wei Jia return false; 37409da86913ca97d7a818a8917b6601527e5e18a24Wei Jia } 375ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber memmove(&mData[offset + 10], &mData[offset + 14], mSize - offset - 14); 376ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber mSize -= 4; 377ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber dataSize -= 4; 378ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 379ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber flags &= ~1; 380ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 381ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 382d1c19c57f66d91ea8033c8fa6510a8760a6e663bMarco Nelissen if ((flags & 2) && (dataSize >= 2)) { 38372a43b68da48890273508cb1c9d646b7d75fc101Marco Nelissen // This file has "unsynchronization", so we have to replace occurrences 38472a43b68da48890273508cb1c9d646b7d75fc101Marco Nelissen // of 0xff 0x00 with just 0xff in order to get the real data. 385ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 38672a43b68da48890273508cb1c9d646b7d75fc101Marco Nelissen size_t readOffset = offset + 11; 38772a43b68da48890273508cb1c9d646b7d75fc101Marco Nelissen size_t writeOffset = offset + 11; 388ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber for (size_t i = 0; i + 1 < dataSize; ++i) { 38972a43b68da48890273508cb1c9d646b7d75fc101Marco Nelissen if (mData[readOffset - 1] == 0xff 39072a43b68da48890273508cb1c9d646b7d75fc101Marco Nelissen && mData[readOffset] == 0x00) { 39172a43b68da48890273508cb1c9d646b7d75fc101Marco Nelissen ++readOffset; 392ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber --mSize; 393ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber --dataSize; 394ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 39572a43b68da48890273508cb1c9d646b7d75fc101Marco Nelissen mData[writeOffset++] = mData[readOffset++]; 396ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 39772a43b68da48890273508cb1c9d646b7d75fc101Marco Nelissen // move the remaining data following this frame 398d1c19c57f66d91ea8033c8fa6510a8760a6e663bMarco Nelissen if (readOffset <= oldSize) { 399d1c19c57f66d91ea8033c8fa6510a8760a6e663bMarco Nelissen memmove(&mData[writeOffset], &mData[readOffset], oldSize - readOffset); 400d1c19c57f66d91ea8033c8fa6510a8760a6e663bMarco Nelissen } else { 401d1c19c57f66d91ea8033c8fa6510a8760a6e663bMarco Nelissen ALOGE("b/34618607 (%zu %zu %zu %zu)", readOffset, writeOffset, oldSize, mSize); 402d1c19c57f66d91ea8033c8fa6510a8760a6e663bMarco Nelissen android_errorWriteLog(0x534e4554, "34618607"); 403d1c19c57f66d91ea8033c8fa6510a8760a6e663bMarco Nelissen } 404ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 405ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 406d1c19c57f66d91ea8033c8fa6510a8760a6e663bMarco Nelissen flags &= ~2; 407428d96d5f882d01acb0abb7e1ceb51d4ccc48efaAndreas Huber if (flags != prevFlags || iTunesHack) { 408ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber WriteSyncsafeInteger(&mData[offset + 4], dataSize); 409ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber mData[offset + 8] = flags >> 8; 410ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber mData[offset + 9] = flags & 0xff; 411ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 412ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 413ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber offset += 10 + dataSize; 414ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber } 415ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 416ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber memset(&mData[mSize], 0, oldSize - mSize); 417ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 418ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber return true; 419ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber} 420ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber 421fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::Iterator::Iterator(const ID3 &parent, const char *id) 422fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber : mParent(parent), 423fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mID(NULL), 424fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mOffset(mParent.mFirstFrameOffset), 425fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameData(NULL), 426fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameSize(0) { 427fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (id) { 428fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mID = strdup(id); 429fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 430fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 431fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber findFrame(); 432fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 433fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 434fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::Iterator::~Iterator() { 435fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mID) { 436fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber free(mID); 437fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mID = NULL; 438fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 439fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 440fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 441fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberbool ID3::Iterator::done() const { 442fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return mFrameData == NULL; 443fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 444fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 445fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubervoid ID3::Iterator::next() { 446fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mFrameData == NULL) { 447fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 448fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 449fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 450fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mOffset += mFrameSize; 451fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 452fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber findFrame(); 453fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 454fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 455fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubervoid ID3::Iterator::getID(String8 *id) const { 456fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id->setTo(""); 457fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 458fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mFrameData == NULL) { 459fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 460fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 461fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 462fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mParent.mVersion == ID3_V2_2) { 463fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id->setTo((const char *)&mParent.mData[mOffset], 3); 464bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } else if (mParent.mVersion == ID3_V2_3 || mParent.mVersion == ID3_V2_4) { 465fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id->setTo((const char *)&mParent.mData[mOffset], 4); 46683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 46783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(mParent.mVersion == ID3_V1 || mParent.mVersion == ID3_V1_1); 46883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 46983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber switch (mOffset) { 47083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 3: 47183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TT2"); 47283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 47383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 33: 47483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TP1"); 47583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 47683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 63: 47783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TAL"); 47883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 47983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 93: 48083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TYE"); 48183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 48283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 97: 48383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("COM"); 48483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 48583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 126: 48683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TRK"); 48783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 48883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 127: 48983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo("TCO"); 49083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 49183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber default: 49283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(!"should not be here."); 49383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 49483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 495fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 496fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 497fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 498fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 499b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen// the 2nd argument is used to get the data following the \0 in a comment field 500b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissenvoid ID3::Iterator::getString(String8 *id, String8 *comment) const { 501b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen getstring(id, false); 502b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen if (comment != NULL) { 503b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen getstring(comment, true); 504b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen } 505b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen} 506b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen 507b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen// comment fields (COM/COMM) contain an initial short descriptor, followed by \0, 508b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen// followed by more data. The data following the \0 can be retrieved by setting 509b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen// "otherdata" to true. 510b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissenvoid ID3::Iterator::getstring(String8 *id, bool otherdata) const { 511fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id->setTo(""); 512fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 513b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen const uint8_t *frameData = mFrameData; 514b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen if (frameData == NULL) { 515fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 516fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 517fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 518b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen uint8_t encoding = *frameData; 519b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen 52083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mParent.mVersion == ID3_V1 || mParent.mVersion == ID3_V1_1) { 52183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mOffset == 126 || mOffset == 127) { 52283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber // Special treatment for the track number and genre. 52383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber char tmp[16]; 5242c9cb62d0160fc4353d89fd9d648725794e7995eGeorge Burgess IV snprintf(tmp, sizeof(tmp), "%d", (int)*frameData); 52583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 52683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber id->setTo(tmp); 52783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return; 52883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 52983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 530544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen // this is supposed to be ISO-8859-1, but pass it up as-is to the caller, who will figure 531544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen // out the real encoding 532544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen id->setTo((const char*)frameData, mFrameSize); 53383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return; 53483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 53583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 5363bf1e0fdf27e1188b8d3574ed073595b8eacb114Wei Jia if (mFrameSize < getHeaderLength() + 1) { 5373bf1e0fdf27e1188b8d3574ed073595b8eacb114Wei Jia return; 5383bf1e0fdf27e1188b8d3574ed073595b8eacb114Wei Jia } 539fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t n = mFrameSize - getHeaderLength() - 1; 540b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen if (otherdata) { 541e1e791727f709c7ab54d47b9cd46d4326a02e913Roger if (n < 5) { 542e1e791727f709c7ab54d47b9cd46d4326a02e913Roger return; 543e1e791727f709c7ab54d47b9cd46d4326a02e913Roger } 544b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen // skip past the encoding, language, and the 0 separator 545b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen frameData += 4; 546b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen int32_t i = n - 4; 547b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen while(--i >= 0 && *++frameData != 0) ; 548b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen int skipped = (frameData - mFrameData); 54914f7672b5d450ed26a06fd3bb3ce045ea78b11b2Andreas Huber if (skipped >= (int)n) { 550b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen return; 551b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen } 552b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen n -= skipped; 553b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen } 554fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 555d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick if (n <= 0) { 556d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick return; 557d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick } 558d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick 559b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen if (encoding == 0x00) { 560544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen // supposedly ISO 8859-1 561544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen id->setTo((const char*)frameData + 1, n); 562b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen } else if (encoding == 0x03) { 563544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen // supposedly UTF-8 564b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen id->setTo((const char *)(frameData + 1), n); 565b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen } else if (encoding == 0x02) { 566544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen // supposedly UTF-16 BE, no byte order mark. 567bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber // API wants number of characters, not number of bytes... 568bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber int len = n / 2; 569b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen const char16_t *framedata = (const char16_t *) (frameData + 1); 570bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber char16_t *framedatacopy = NULL; 571bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber#if BYTE_ORDER == LITTLE_ENDIAN 572c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick if (len > 0) { 573c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick framedatacopy = new (std::nothrow) char16_t[len]; 574d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick if (framedatacopy == NULL) { 575d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick return; 576c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick } 577d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick for (int i = 0; i < len; i++) { 578d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick framedatacopy[i] = bswap_16(framedata[i]); 579d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick } 580d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick framedata = framedatacopy; 581bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 582bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber#endif 583bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber id->setTo(framedata, len); 584bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (framedatacopy != NULL) { 585bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber delete[] framedatacopy; 586bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 587544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen } else if (encoding == 0x01) { 588fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // UCS-2 58908e7eb983fcb9860a574e964ff905f75aab88d2fAndreas Huber // API wants number of characters, not number of bytes... 5905a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen int len = n / 2; 591b636abde14f2612ea236257846b9ab15d87d4623Marco Nelissen const char16_t *framedata = (const char16_t *) (frameData + 1); 5925a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen char16_t *framedatacopy = NULL; 5935a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen if (*framedata == 0xfffe) { 594d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick // endianness marker != host endianness, convert & skip 595d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick if (len <= 1) { 596d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick return; // nothing after the marker 597d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick } 598d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick framedatacopy = new (std::nothrow) char16_t[len]; 599d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick if (framedatacopy == NULL) { 600d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick return; 601d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick } 602d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick for (int i = 0; i < len; i++) { 603d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick framedatacopy[i] = bswap_16(framedata[i]); 604d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick } 605d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick framedata = framedatacopy; 606d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick // and skip over the marker 607d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick framedata++; 608d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick len--; 609d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick } else if (*framedata == 0xfeff) { 610d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick // endianness marker == host endianness, skip it 611d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick if (len <= 1) { 612d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick return; // nothing after the marker 6135a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen } 6145a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen framedata++; 6155a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen len--; 6165a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen } 617544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen 618544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen // check if the resulting data consists entirely of 8-bit values 619544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen bool eightBit = true; 620544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen for (int i = 0; i < len; i++) { 621544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen if (framedata[i] > 0xff) { 622544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen eightBit = false; 623544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen break; 624544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen } 625544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen } 626d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick if (eightBit) { 627544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen // collapse to 8 bit, then let the media scanner client figure out the real encoding 628c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick char *frame8 = new (std::nothrow) char[len]; 629c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick if (frame8 != NULL) { 630c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick for (int i = 0; i < len; i++) { 631c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick frame8[i] = framedata[i]; 632c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick } 633c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick id->setTo(frame8, len); 634c54432ae4f3627b1003fa251616b0103dad8b5d0Ray Essick delete [] frame8; 635d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick } else { 636d2b126291b7cc302ebcef8249bef7813e0dd77dcRay Essick id->setTo(framedata, len); 637544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen } 638544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen } else { 639544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen id->setTo(framedata, len); 640544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen } 641544ad2be674423238c47650d2c8588ba7dfc9ed2Marco Nelissen 6425a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen if (framedatacopy != NULL) { 6435a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen delete[] framedatacopy; 6445a2621a64de196cbdb9a2a50357dee1c32fcf11bMarco Nelissen } 645fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 646fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 647fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 648fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberconst uint8_t *ID3::Iterator::getData(size_t *length) const { 649fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *length = 0; 650fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 651fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mFrameData == NULL) { 652fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return NULL; 653fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 654fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 655be7b5e253f85132683826f305e5dcdaf83f0b300Joshua J. Drake // Prevent integer underflow 656be7b5e253f85132683826f305e5dcdaf83f0b300Joshua J. Drake if (mFrameSize < getHeaderLength()) { 657be7b5e253f85132683826f305e5dcdaf83f0b300Joshua J. Drake return NULL; 658be7b5e253f85132683826f305e5dcdaf83f0b300Joshua J. Drake } 659be7b5e253f85132683826f305e5dcdaf83f0b300Joshua J. Drake 660fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *length = mFrameSize - getHeaderLength(); 661fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 662fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return mFrameData; 663fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 664fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 665fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubersize_t ID3::Iterator::getHeaderLength() const { 666fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mParent.mVersion == ID3_V2_2) { 667fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return 6; 668bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } else if (mParent.mVersion == ID3_V2_3 || mParent.mVersion == ID3_V2_4) { 669fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return 10; 67083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 67183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(mParent.mVersion == ID3_V1 || mParent.mVersion == ID3_V1_1); 67283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return 0; 673fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 674fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 675fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 676fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubervoid ID3::Iterator::findFrame() { 677fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber for (;;) { 678fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameData = NULL; 679fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameSize = 0; 680fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 681fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mParent.mVersion == ID3_V2_2) { 682fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mOffset + 6 > mParent.mSize) { 683fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 684fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 685fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 686fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!memcmp(&mParent.mData[mOffset], "\0\0\0", 3)) { 687fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 688fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 689fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 690fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameSize = 691fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber (mParent.mData[mOffset + 3] << 16) 692fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber | (mParent.mData[mOffset + 4] << 8) 693fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber | mParent.mData[mOffset + 5]; 694fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 695ba6e982635f11bced34897f4317cbe8ff1c89483Marco Nelissen if (mFrameSize == 0) { 696ba6e982635f11bced34897f4317cbe8ff1c89483Marco Nelissen return; 697ba6e982635f11bced34897f4317cbe8ff1c89483Marco Nelissen } 698ba6e982635f11bced34897f4317cbe8ff1c89483Marco Nelissen mFrameSize += 6; // add tag id and size field 699fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 700c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake // Prevent integer overflow in validation 701c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake if (SIZE_MAX - mOffset <= mFrameSize) { 702c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake return; 703c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake } 704c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake 705fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mOffset + mFrameSize > mParent.mSize) { 706b4a7a2df4c28c3f32b5d877b54831d2cc5d78f81Colin Cross ALOGV("partial frame at offset %zu (size = %zu, bytes-remaining = %zu)", 707b4a7a2df4c28c3f32b5d877b54831d2cc5d78f81Colin Cross mOffset, mFrameSize, mParent.mSize - mOffset - (size_t)6); 708fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 709fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 710fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 711fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameData = &mParent.mData[mOffset + 6]; 712fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 713fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!mID) { 714fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber break; 715fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 716fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 717fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber char id[4]; 718fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber memcpy(id, &mParent.mData[mOffset], 3); 719fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id[3] = '\0'; 720fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 721fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!strcmp(id, mID)) { 722fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber break; 723fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 724bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } else if (mParent.mVersion == ID3_V2_3 725bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber || mParent.mVersion == ID3_V2_4) { 726fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mOffset + 10 > mParent.mSize) { 727fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 728fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 729fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 730fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!memcmp(&mParent.mData[mOffset], "\0\0\0\0", 4)) { 731fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 732fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 733fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 734c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake size_t baseSize = 0; 735bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (mParent.mVersion == ID3_V2_4) { 736bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (!ParseSyncsafeInteger( 737bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber &mParent.mData[mOffset + 4], &baseSize)) { 738bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber return; 739bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 740bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } else { 741bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber baseSize = U32_AT(&mParent.mData[mOffset + 4]); 742bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 743bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 744ba6e982635f11bced34897f4317cbe8ff1c89483Marco Nelissen if (baseSize == 0) { 745ba6e982635f11bced34897f4317cbe8ff1c89483Marco Nelissen return; 746ba6e982635f11bced34897f4317cbe8ff1c89483Marco Nelissen } 747ba6e982635f11bced34897f4317cbe8ff1c89483Marco Nelissen 748c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake // Prevent integer overflow when adding 749c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake if (SIZE_MAX - 10 <= baseSize) { 750c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake return; 751c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake } 752c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake 753ba6e982635f11bced34897f4317cbe8ff1c89483Marco Nelissen mFrameSize = 10 + baseSize; // add tag id, size field and flags 754fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 755c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake // Prevent integer overflow in validation 756c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake if (SIZE_MAX - mOffset <= mFrameSize) { 757c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake return; 758c580c836c1941fb4912e1dd4e08626caf98a62c7Joshua J. Drake } 759fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 760fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (mOffset + mFrameSize > mParent.mSize) { 761b4a7a2df4c28c3f32b5d877b54831d2cc5d78f81Colin Cross ALOGV("partial frame at offset %zu (size = %zu, bytes-remaining = %zu)", 762b4a7a2df4c28c3f32b5d877b54831d2cc5d78f81Colin Cross mOffset, mFrameSize, mParent.mSize - mOffset - (size_t)10); 763fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return; 764fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 765fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 766bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber uint16_t flags = U16_AT(&mParent.mData[mOffset + 8]); 767bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 768ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber if ((mParent.mVersion == ID3_V2_4 && (flags & 0x000c)) 769bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber || (mParent.mVersion == ID3_V2_3 && (flags & 0x00c0))) { 770ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber // Compression or encryption are not supported at this time. 771ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber // Per-frame unsynchronization and data-length indicator 772ac994dfb88d414aeedf5998aa1c6015c5b47ec01Andreas Huber // have already been taken care of. 773bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 7743856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("Skipping unsupported frame (compression, encryption " 775bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber "or per-frame unsynchronization flagged"); 776bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 777bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber mOffset += mFrameSize; 778bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber continue; 779bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber } 780bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber 781fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mFrameData = &mParent.mData[mOffset + 10]; 782fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 783fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!mID) { 784fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber break; 785fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 786fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 787fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber char id[5]; 788fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber memcpy(id, &mParent.mData[mOffset], 4); 789fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber id[4] = '\0'; 790fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 791fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!strcmp(id, mID)) { 792fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber break; 793fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 79483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 79583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(mParent.mVersion == ID3_V1 || mParent.mVersion == ID3_V1_1); 79683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 79783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mOffset >= mParent.mSize) { 79883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return; 79983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 80083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 80183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameData = &mParent.mData[mOffset]; 80283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 80383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber switch (mOffset) { 80483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 3: 80583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 33: 80683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 63: 80783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 30; 80883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 80983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 93: 81083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 4; 81183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 81283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 97: 81383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mParent.mVersion == ID3_V1) { 81483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 30; 81583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 81683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 29; 81783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 81883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 81983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 126: 82083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 1; 82183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 82283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber case 127: 82383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFrameSize = 1; 82483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 82583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber default: 82683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber CHECK(!"Should not be here, invalid offset."); 82783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 82883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 82983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 83083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (!mID) { 83183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 83283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 83383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 83483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber String8 id; 83583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber getID(&id); 83683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 83783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (id == mID) { 83883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber break; 83983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 840fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 841fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 842fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mOffset += mFrameSize; 843fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 844fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 845fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 846ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick// return includes terminator; if unterminated, returns > limit 847ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essickstatic size_t StringSize(const uint8_t *start, size_t limit, uint8_t encoding) { 848ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick 849bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (encoding == 0x00 || encoding == 0x03) { 850bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber // ISO 8859-1 or UTF-8 851ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick return strnlen((const char *)start, limit) + 1; 852fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 853fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 854fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // UCS-2 855fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t n = 0; 856ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick while ((n+1 < limit) && (start[n] != '\0' || start[n + 1] != '\0')) { 857fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber n += 2; 858fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 859ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick n += 2; 860ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick return n; 861fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 862fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 863fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huberconst void * 864fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas HuberID3::getAlbumArt(size_t *length, String8 *mime) const { 865fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *length = 0; 866fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mime->setTo(""); 867fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 868bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber Iterator it( 869bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber *this, 870bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber (mVersion == ID3_V2_3 || mVersion == ID3_V2_4) ? "APIC" : "PIC"); 871fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 872fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber while (!it.done()) { 873fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t size; 874fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber const uint8_t *data = it.getData(&size); 875be7b5e253f85132683826f305e5dcdaf83f0b300Joshua J. Drake if (!data) { 876be7b5e253f85132683826f305e5dcdaf83f0b300Joshua J. Drake return NULL; 877be7b5e253f85132683826f305e5dcdaf83f0b300Joshua J. Drake } 878fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 879bebd11b5a406bc4243cb7bd55f6849841bf911a7Andreas Huber if (mVersion == ID3_V2_3 || mVersion == ID3_V2_4) { 880fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t encoding = data[0]; 881ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick size_t consumed = 1; 882ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick 883ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick // *always* in an 8-bit encoding 884ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick size_t mimeLen = StringSize(&data[consumed], size - consumed, 0x00); 885ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick if (mimeLen > size - consumed) { 886ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick ALOGW("bogus album art size: mime"); 887ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick return NULL; 888ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick } 889ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick mime->setTo((const char *)&data[consumed]); 890ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick consumed += mimeLen; 891fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 892fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#if 0 893ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick uint8_t picType = data[consumed]; 894fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (picType != 0x03) { 895fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // Front Cover Art 896fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber it.next(); 897fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber continue; 898fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 899fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#endif 900fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 901ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick consumed++; 902ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick if (consumed >= size) { 903ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick ALOGW("bogus album art size: pic type"); 904ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick return NULL; 905ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick } 906ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick 907ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick size_t descLen = StringSize(&data[consumed], size - consumed, encoding); 908ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick consumed += descLen; 909fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 910ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick if (consumed >= size) { 911ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick ALOGW("bogus album art size: description"); 912f26400c9d01a0e2f71690d5ebc644270f098d590Marco Nelissen return NULL; 913f26400c9d01a0e2f71690d5ebc644270f098d590Marco Nelissen } 914fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 915ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick *length = size - consumed; 916ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick 917ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick return &data[consumed]; 918fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 919fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t encoding = data[0]; 920fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 921ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick if (size <= 5) { 922ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick return NULL; 923ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick } 924ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick 925fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!memcmp(&data[1], "PNG", 3)) { 926fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mime->setTo("image/png"); 927fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else if (!memcmp(&data[1], "JPG", 3)) { 928fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mime->setTo("image/jpeg"); 929fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else if (!memcmp(&data[1], "-->", 3)) { 930fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber mime->setTo("text/plain"); 931fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } else { 932fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return NULL; 933fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 934fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 935fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#if 0 936fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber uint8_t picType = data[4]; 937fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (picType != 0x03) { 938fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber // Front Cover Art 939fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber it.next(); 940fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber continue; 941fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 942fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#endif 943fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 944ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick size_t descLen = StringSize(&data[5], size - 5, encoding); 945ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick if (descLen > size - 5) { 946ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick return NULL; 947ebb726f940b29174f8dd4bb74d6de39c3f6eb611Ray Essick } 948fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 949fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber *length = size - 5 - descLen; 950fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 951fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return &data[5 + descLen]; 952fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 953fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 954fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 955fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return NULL; 956fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 957fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 95883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huberbool ID3::parseV1(const sp<DataSource> &source) { 95983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber const size_t V1_TAG_SIZE = 128; 96083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 961c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t size; 962c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong if (source->getSize(&size) != OK || size < (off64_t)V1_TAG_SIZE) { 96383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return false; 96483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 96583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 96683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = (uint8_t *)malloc(V1_TAG_SIZE); 96783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (source->readAt(size - V1_TAG_SIZE, mData, V1_TAG_SIZE) 96883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber != (ssize_t)V1_TAG_SIZE) { 96983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 97083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 97183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 97283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return false; 97383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 97483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 97583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (memcmp("TAG", mData, 3)) { 97683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber free(mData); 97783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mData = NULL; 97883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 97983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return false; 98083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 98183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 98283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mSize = V1_TAG_SIZE; 98383e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mFirstFrameOffset = 3; 98483e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 98583e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber if (mData[V1_TAG_SIZE - 3] != 0) { 98683e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mVersion = ID3_V1; 98783e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } else { 98883e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber mVersion = ID3_V1_1; 98983e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber } 99083e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber 99183e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber return true; 99283e5850bdf9c8b5c36c364b367b039674eb827adAndreas Huber} 993fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 994fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} // namespace android 995