C++ KeyedVector::keyAt方法代码示例

static AString codecResultsToXml(const KeyedVector<AString, CodecSettings> &results) {
    AString ret;
    for (size_t i = 0; i < results.size(); ++i) {
        AString name;
        AString mime;
        if (!splitString(results.keyAt(i), " ", &name, &mime)) {
            continue;
        }
        AString codec =
                AStringPrintf("        <MediaCodec name=\"%s\" type=\"%s\" update=\"true\" >\n",
                              name.c_str(),
                              mime.c_str());
        ret.append(codec);
        const CodecSettings &settings = results.valueAt(i);
        for (size_t i = 0; i < settings.size(); ++i) {
            // WARNING: we assume all the settings are "Limit". Currently we have only one type
            // of setting in this case, which is "max-supported-instances".
            AString setting = AStringPrintf(
                    "            <Limit name=\"%s\" value=\"%s\" />\n",
                    settings.keyAt(i).c_str(),
                    settings.valueAt(i).c_str());
            ret.append(setting);
        }
        ret.append("        </MediaCodec>\n");
    }
    return ret;
}

static jobject KeyedVectorToHashMap (JNIEnv *env, KeyedVector<String8, String8> const &map) {
    jclass clazz = gFields.hashmapClassId;
    jobject hashMap = env->NewObject(clazz, gFields.hashmap.init);
    for (size_t i = 0; i < map.size(); ++i) {
        jstring jkey = env->NewStringUTF(map.keyAt(i).string());
        jstring jvalue = env->NewStringUTF(map.valueAt(i).string());
        env->CallObjectMethod(hashMap, gFields.hashmap.put, jkey, jvalue);
        env->DeleteLocalRef(jkey);
        env->DeleteLocalRef(jvalue);
    }
    return hashMap;
}

void HeapCache::dump_heaps()
{
    Mutex::Autolock _l(mHeapCacheLock);
    int c = mHeapCache.size();
    for (int i=0 ; i<c ; i++) {
        const heap_info_t& info = mHeapCache.valueAt(i);
        BpMemoryHeap const* h(static_cast<BpMemoryHeap const *>(info.heap.get()));
        ALOGD("hey=%p, heap=%p, count=%d, (fd=%d, base=%p, size=%d)",
                mHeapCache.keyAt(i).unsafe_get(),
                info.heap.get(), info.count,
                h->mHeapId, h->mBase, h->mSize);
    }
}

status_t MPEG2TSExtractor::feedMore() {
    Mutex::Autolock autoLock(mLock);

    uint8_t packet[kTSPacketSize];
    ssize_t n = mDataSource->readAt(mOffset, packet, kTSPacketSize);

    if (n < (ssize_t)kTSPacketSize) {
        if (n >= 0) {
            mParser->signalEOS(ERROR_END_OF_STREAM);
        }
        return (n < 0) ? (status_t)n : ERROR_END_OF_STREAM;
    }

    ATSParser::SyncEvent event(mOffset);
    mOffset += n;
    status_t err = mParser->feedTSPacket(packet, kTSPacketSize, &event);
    if (event.isInit()) {
        for (size_t i = 0; i < mSourceImpls.size(); ++i) {
            if (mSourceImpls[i].get() == event.getMediaSource().get()) {
                KeyedVector<int64_t, off64_t> *syncPoints = &mSyncPoints.editItemAt(i);
                syncPoints->add(event.getTimeUs(), event.getOffset());
                // We're keeping the size of the sync points at most 5mb per a track.
                size_t size = syncPoints->size();
                if (size >= 327680) {
                    int64_t firstTimeUs = syncPoints->keyAt(0);
                    int64_t lastTimeUs = syncPoints->keyAt(size - 1);
                    if (event.getTimeUs() - firstTimeUs > lastTimeUs - event.getTimeUs()) {
                        syncPoints->removeItemsAt(0, 4096);
                    } else {
                        syncPoints->removeItemsAt(size - 4096, 4096);
                    }
                }
                break;
            }
        }
    }
    return err;
}

void generate(const KeyedVector<String8, Vector<SplitDescription> >& splits, const String8& base) {
    Vector<SplitDescription> allSplits;
    const size_t apkSplitCount = splits.size();
    for (size_t i = 0; i < apkSplitCount; i++) {
        allSplits.appendVector(splits[i]);
    }
    const SplitSelector selector(allSplits);
    KeyedVector<SplitDescription, sp<Rule> > rules(selector.getRules());

    bool first = true;
    fprintf(stdout, "[\n");
    for (size_t i = 0; i < apkSplitCount; i++) {
        if (splits.keyAt(i) == base) {
            // Skip the base.
            continue;
        }

        if (!first) {
            fprintf(stdout, ",\n");
        }
        first = false;

        sp<Rule> masterRule = new Rule();
        masterRule->op = Rule::OR_SUBRULES;
        const Vector<SplitDescription>& splitDescriptions = splits[i];
        const size_t splitDescriptionCount = splitDescriptions.size();
        for (size_t j = 0; j < splitDescriptionCount; j++) {
            masterRule->subrules.add(rules.valueFor(splitDescriptions[j]));
        }
        masterRule = Rule::simplify(masterRule);
        fprintf(stdout, "  {\n    \"path\": \"%s\",\n    \"rules\": %s\n  }",
                splits.keyAt(i).string(),
                masterRule->toJson(2).string());
    }
    fprintf(stdout, "\n]\n");
}

status_t TiffWriter::write(Output* out, StripSource** sources, size_t sourcesCount,
        Endianness end) {
    status_t ret = OK;
    EndianOutput endOut(out, end);

    if (mIfd == NULL) {
        ALOGE("%s: Tiff header is empty.", __FUNCTION__);
        return BAD_VALUE;
    }

    uint32_t totalSize = getTotalSize();

    KeyedVector<uint32_t, uint32_t> offsetVector;

    for (size_t i = 0; i < mNamedIfds.size(); ++i) {
        if (mNamedIfds[i]->uninitializedOffsets()) {
            uint32_t stripSize = mNamedIfds[i]->getStripSize();
            if (mNamedIfds[i]->setStripOffset(totalSize) != OK) {
                ALOGE("%s: Could not set strip offsets.", __FUNCTION__);
                return BAD_VALUE;
            }
            totalSize += stripSize;
            WORD_ALIGN(totalSize);
            offsetVector.add(mNamedIfds.keyAt(i), totalSize);
        }
    }

    size_t offVecSize = offsetVector.size();
    if (offVecSize != sourcesCount) {
        ALOGE("%s: Mismatch between number of IFDs with uninitialized strips (%zu) and"
                " sources (%zu).", __FUNCTION__, offVecSize, sourcesCount);
        return BAD_VALUE;
    }

    BAIL_ON_FAIL(writeFileHeader(endOut), ret);

    uint32_t offset = FILE_HEADER_SIZE;
    sp<TiffIfd> ifd = mIfd;
    while(ifd != NULL) {
        BAIL_ON_FAIL(ifd->writeData(offset, &endOut), ret);
        offset += ifd->getSize();
        ifd = ifd->getNextIfd();
    }

    if (LOG_NDEBUG == 0) {
        log();
    }

    for (size_t i = 0; i < offVecSize; ++i) {
        uint32_t ifdKey = offsetVector.keyAt(i);
        uint32_t sizeToWrite = mNamedIfds[ifdKey]->getStripSize();
        bool found = false;
        for (size_t j = 0; j < sourcesCount; ++j) {
            if (sources[j]->getIfd() == ifdKey) {
                if ((ret = sources[i]->writeToStream(endOut, sizeToWrite)) != OK) {
                    ALOGE("%s: Could not write to stream, received %d.", __FUNCTION__, ret);
                    return ret;
                }
                ZERO_TILL_WORD(&endOut, sizeToWrite, ret);
                found = true;
                break;
            }
        }
        if (!found) {
            ALOGE("%s: No stream for byte strips for IFD %u", __FUNCTION__, ifdKey);
            return BAD_VALUE;
        }
        assert(offsetVector[i] == endOut.getCurrentOffset());
    }

    return ret;
}