C++ FileMap::getDataPtr方法代码示例

status_t Tokenizer::open(const String8& filename, Tokenizer** outTokenizer) {
    *outTokenizer = NULL;

    int result = NO_ERROR;
    int fd = ::open(filename.string(), O_RDONLY);
    if (fd < 0) {
        result = -errno;
        ALOGE("Error opening file '%s', %s.", filename.string(), strerror(errno));
    } else {
        struct stat stat;
        if (fstat(fd, &stat)) {
            result = -errno;
            ALOGE("Error getting size of file '%s', %s.", filename.string(), strerror(errno));
        } else {
            size_t length = size_t(stat.st_size);

            FileMap* fileMap = new FileMap();
            bool ownBuffer = false;
            char* buffer;
            if (fileMap->create(NULL, fd, 0, length, true)) {
                fileMap->advise(FileMap::SEQUENTIAL);
                buffer = static_cast<char*>(fileMap->getDataPtr());
            } else {
                delete fileMap;
                fileMap = NULL;

                // Fall back to reading into a buffer since we can't mmap files in sysfs.
                // The length we obtained from stat is wrong too (it will always be 4096)
                // so we must trust that read will read the entire file.
                buffer = new char[length];
                ownBuffer = true;
                ssize_t nrd = read(fd, buffer, length);
                if (nrd < 0) {
                    result = -errno;
                    ALOGE("Error reading file '%s', %s.", filename.string(), strerror(errno));
                    delete[] buffer;
                    buffer = NULL;
                } else {
                    length = size_t(nrd);
                }
            }

            if (!result) {
                *outTokenizer = new Tokenizer(filename, fileMap, buffer, ownBuffer, length);
            }
        }
        close(fd);
    }
    return result;
}

bool BootAnimation::readFile(const char* name, String8& outString)
{
    ZipEntryRO entry = mZip->findEntryByName(name);
    ALOGE_IF(!entry, "couldn't find %s", name);
    if (!entry) {
        return false;
    }

    FileMap* entryMap = mZip->createEntryFileMap(entry);
    mZip->releaseEntry(entry);
    ALOGE_IF(!entryMap, "entryMap is null");
    if (!entryMap) {
        return false;
    }

    outString.setTo((char const*)entryMap->getDataPtr(), entryMap->getDataLength());
    entryMap->release();
    return true;
}

bool BootAnimation::movie()
{
    ZipEntryRO desc = mZip->findEntryByName("desc.txt");
    ALOGE_IF(!desc, "couldn't find desc.txt");
    if (!desc) {
        return false;
    }

    FileMap* descMap = mZip->createEntryFileMap(desc);
    mZip->releaseEntry(desc);
    ALOGE_IF(!descMap, "descMap is null");
    if (!descMap) {
        return false;
    }

    String8 desString((char const*)descMap->getDataPtr(),
            descMap->getDataLength());
    descMap->release();
    char const* s = desString.string();

    Animation animation;

    // Parse the description file
    for (;;) {
        const char* endl = strstr(s, "\n");
        if (!endl) break;
        String8 line(s, endl - s);
        const char* l = line.string();
        int fps, width, height, count, pause;
        char path[ANIM_ENTRY_NAME_MAX];
        char pathType;
        if (sscanf(l, "%d %d %d", &width, &height, &fps) == 3) {
            //LOGD("> w=%d, h=%d, fps=%d", width, height, fps);
            animation.width = width;
            animation.height = height;
            animation.fps = fps;
        }
        else if (sscanf(l, " %c %d %d %s", &pathType, &count, &pause, path) == 4) {
            //LOGD("> type=%c, count=%d, pause=%d, path=%s", pathType, count, pause, path);
            Animation::Part part;
            part.playUntilComplete = pathType == 'c';
            part.count = count;
            part.pause = pause;
            part.path = path;
            animation.parts.add(part);
        }

        s = ++endl;
    }

    // read all the data structures
    const size_t pcount = animation.parts.size();
    void *cookie = NULL;
    if (!mZip->startIteration(&cookie)) {
        return false;
    }

    ZipEntryRO entry;
    char name[ANIM_ENTRY_NAME_MAX];
    while ((entry = mZip->nextEntry(cookie)) != NULL) {
        const int foundEntryName = mZip->getEntryFileName(entry, name, ANIM_ENTRY_NAME_MAX);
        if (foundEntryName > ANIM_ENTRY_NAME_MAX || foundEntryName == -1) {
            ALOGE("Error fetching entry file name");
            continue;
        }

        const String8 entryName(name);
        const String8 path(entryName.getPathDir());
        const String8 leaf(entryName.getPathLeaf());
        if (leaf.size() > 0) {
            for (size_t j=0 ; j<pcount ; j++) {
                if (path == animation.parts[j].path) {
                    int method;
                    // supports only stored png files
                    if (mZip->getEntryInfo(entry, &method, NULL, NULL, NULL, NULL, NULL)) {
                        if (method == ZipFileRO::kCompressStored) {
                            FileMap* map = mZip->createEntryFileMap(entry);
                            if (map) {
                                Animation::Frame frame;
                                frame.name = leaf;
                                frame.map = map;
                                Animation::Part& part(animation.parts.editItemAt(j));
                                part.frames.add(frame);
                            }
                        }
                    }
                }
            }
        }
    }

    mZip->endIteration(cookie);

    // clear screen
    glShadeModel(GL_FLAT);
    glDisable(GL_DITHER);
    glDisable(GL_SCISSOR_TEST);
    glDisable(GL_BLEND);
    glClearColor(0,0,0,1);
    glClear(GL_COLOR_BUFFER_BIT);
//.........这里部分代码省略.........

bool BootAnimation::movie()
{
    ZipFileRO& zip(mZip);

    size_t numEntries = zip.getNumEntries();
    ZipEntryRO desc = zip.findEntryByName("desc.txt");
    FileMap* descMap = zip.createEntryFileMap(desc);
    LOGE_IF(!descMap, "descMap is null");
    if (!descMap) {
        return false;
    }

    String8 desString((char const*)descMap->getDataPtr(),
            descMap->getDataLength());
    char const* s = desString.string();

    Animation animation;

    // Parse the description file
    for (;;) {
        const char* endl = strstr(s, "\n");
        if (!endl) break;
        String8 line(s, endl - s);
        const char* l = line.string();
        int fps, width, height, count, pause;
        char path[256];
        if (sscanf(l, "%d %d %d", &width, &height, &fps) == 3) {
            //LOGD("> w=%d, h=%d, fps=%d", fps, width, height);
            animation.width = width;
            animation.height = height;
            animation.fps = fps;
        }
        if (sscanf(l, "p %d %d %s", &count, &pause, path) == 3) {
            //LOGD("> count=%d, pause=%d, path=%s", count, pause, path);
            Animation::Part part;
            part.count = count;
            part.pause = pause;
            part.path = path;
            animation.parts.add(part);
        }
        s = ++endl;
    }

    // read all the data structures
    const size_t pcount = animation.parts.size();
    for (size_t i=0 ; i<numEntries ; i++) {
        char name[256];
        ZipEntryRO entry = zip.findEntryByIndex(i);
        if (zip.getEntryFileName(entry, name, 256) == 0) {
            const String8 entryName(name);
            const String8 path(entryName.getPathDir());
            const String8 leaf(entryName.getPathLeaf());
            if (leaf.size() > 0) {
                for (int j=0 ; j<pcount ; j++) {
                    if (path == animation.parts[j].path) {
                        int method;
                        // supports only stored png files
                        if (zip.getEntryInfo(entry, &method, 0, 0, 0, 0, 0)) {
                            if (method == ZipFileRO::kCompressStored) {
                                FileMap* map = zip.createEntryFileMap(entry);
                                if (map) {
                                    Animation::Frame frame;
                                    frame.name = leaf;
                                    frame.map = map;
                                    Animation::Part& part(animation.parts.editItemAt(j));
                                    part.frames.add(frame);
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    // clear screen
    glShadeModel(GL_FLAT);
    glDisable(GL_DITHER);
    glDisable(GL_SCISSOR_TEST);
    glDisable(GL_BLEND);
    glClear(GL_COLOR_BUFFER_BIT);

    eglSwapBuffers(mDisplay, mSurface);

    glBindTexture(GL_TEXTURE_2D, 0);
    glEnable(GL_TEXTURE_2D);
    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    const int xc = (mWidth - animation.width) / 2;
    const int yc = ((mHeight - animation.height) / 2);
    nsecs_t lastFrame = systemTime();
    nsecs_t frameDuration = s2ns(1) / animation.fps;

    Region clearReg(Rect(mWidth, mHeight));
    clearReg.subtractSelf(Region(Rect(xc, yc, xc+animation.width, yc+animation.height)));

//.........这里部分代码省略.........

bool BootAnimation::movie()
{

    char bootenabled[PROPERTY_VALUE_MAX];
    char bootsound[PROPERTY_VALUE_MAX];
    char bootvolume[PROPERTY_VALUE_MAX];
    property_get("persist.sys.boot_enabled", bootenabled, "1");
    property_get("persist.sys.boot_sound", bootsound, "1");
    property_get("persist.sys.boot_volume", bootvolume, "0.2");

    bool bootEnabled = atoi(bootenabled) != 0;
    bool enableSound = atoi(bootsound) != 0;
    float bootVolume = strtof(bootvolume, NULL);

    if(!bootEnabled) {
        return false;
    }

    if(enableSound){
      sp<MediaPlayer> mediaplay = new MediaPlayer();
      mediaplay->setDataSource ("/system/media/audio.mp3", NULL);
      mediaplay->setVolume (bootVolume, bootVolume);
      mediaplay->prepare();
      mediaplay->start();
    }

    ZipFileRO& zip(mZip);

    size_t numEntries = zip.getNumEntries();
    ZipEntryRO desc = zip.findEntryByName("desc.txt");
    FileMap* descMap = zip.createEntryFileMap(desc);
    ALOGE_IF(!descMap, "descMap is null");
    if (!descMap) {
        return false;
    }

    String8 desString((char const*)descMap->getDataPtr(),
            descMap->getDataLength());
    char const* s = desString.string();

    Animation animation;

    float r = 0.0f;
    float g = 0.0f;
    float b = 0.0f;

    // Parse the description file
    for (;;) {
        const char* endl = strstr(s, "\n");
        if (!endl) break;
        String8 line(s, endl - s);
        const char* l = line.string();
        int fps, width, height, count, pause, red, green, blue;
        char path[256];
        char pathType;
        if (sscanf(l, "%d %d %d %d %d %d", &width, &height, &fps, &red, &green, &blue) == 6) {
            //ALOGD("> w=%d, h=%d, fps=%d, rgb=(%d, %d, %d)", width, height, fps, red, green, blue);
            animation.width = width;
            animation.height = height;
            animation.fps = fps;
            r = (float) red / 255.0f;
            g = (float) green / 255.0f;
            b = (float) blue / 255.0f;
        }
        else if (sscanf(l, "%d %d %d", &width, &height, &fps) == 3) {
            //LOGD("> w=%d, h=%d, fps=%d", width, height, fps);
            animation.width = width;
            animation.height = height;
            animation.fps = fps;
        }
        else if (sscanf(l, " %c %d %d %s", &pathType, &count, &pause, path) == 4) {
            //LOGD("> type=%c, count=%d, pause=%d, path=%s", pathType, count, pause, path);
            Animation::Part part;
            part.playUntilComplete = pathType == 'c';
            part.count = count;
            part.pause = pause;
            part.path = path;
            animation.parts.add(part);
        }

        s = ++endl;
    }

    // read all the data structures
    const size_t pcount = animation.parts.size();
    for (size_t i=0 ; i<numEntries ; i++) {
        char name[256];
        ZipEntryRO entry = zip.findEntryByIndex(i);
        if (zip.getEntryFileName(entry, name, 256) == 0) {
            const String8 entryName(name);
            const String8 path(entryName.getPathDir());
            const String8 leaf(entryName.getPathLeaf());
            if (leaf.size() > 0) {
                for (size_t j=0 ; j<pcount ; j++) {
                    if (path == animation.parts[j].path) {
                        int method;
                        // supports only stored png files
                        if (zip.getEntryInfo(entry, &method, 0, 0, 0, 0, 0)) {
                            if (method == ZipFileRO::kCompressStored) {
                                FileMap* map = zip.createEntryFileMap(entry);
//.........这里部分代码省略.........