AVIODirEntry 目录信息

#include <QCoreApplication>

extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavformat/avio.h>
}

// clang -g -o list dir_demo.c `pkg-config --libs liavformat libavutil`
static const char *type_string(int type)
{
    switch (type) {
    case AVIO_ENTRY_DIRECTORY:
        return "<DIR>";
    case AVIO_ENTRY_FILE:
        return "<FILE>";
    case AVIO_ENTRY_BLOCK_DEVICE:
        return "<BLOCK DEVICE>";
    case AVIO_ENTRY_CHARACTER_DEVICE:
        return "<CHARACTER DEVICE>";
    case AVIO_ENTRY_NAMED_PIPE:
        return "<PIPE>";
    case AVIO_ENTRY_SYMBOLIC_LINK:
        return "<LINK>";
    case AVIO_ENTRY_SOCKET:
        return "<SOCKET>";
    case AVIO_ENTRY_SERVER:
        return "<SERVER>";
    case AVIO_ENTRY_SHARE:
        return "<SHARE>";
    case AVIO_ENTRY_WORKGROUP:
        return "<WORKGROUP>";
    case AVIO_ENTRY_UNKNOWN:
    default:
        break;
    }
    return "<UNKNOWN>";
}

static int list_op(const char *input_dir) {
    // 单条目录结构指针,存放读取到的目录数据,如文件名，文件大小等信息
    AVIODirEntry *entry = NULL;
    //结构体, 操作目录的上下文
    AVIODirContext * ctx = NULL;
    int cnt, ret;

    char filemode[4], uid_and_gid[20];
    // 打开文件夹
    if((ret = avio_open_dir(&ctx, input_dir, NULL) ) < 0) {
        av_log(NULL, AV_LOG_ERROR, "Cannot open directory: %s.\n", av_err2str(ret));
        goto fail;
    }
    cnt = 0;
    for(;;) {
        //读取文件夹
        if((ret = avio_read_dir(ctx, &entry)) < 0) {
            av_log(NULL, AV_LOG_ERROR, "Connot list directory: %s.\n", av_err2str(ret));
            goto fail;
        }
        if (!entry)
             break;
        if(entry->filemode == -1) {
            snprintf(filemode, 4, "???");
        } else {
            snprintf(filemode, 4, "%3" PRIo64, entry->filemode);
        }
        // 打印文件信息, PRId64 是 64的宏信息
        snprintf(uid_and_gid, 20, "%" PRId64 "(%" PRId64 ")", entry->user_id, entry->group_id);
        if (cnt == 0)
            av_log(NULL, AV_LOG_INFO, "%-9s %12s %30s %10s %s %16s %16s %16s\n",
                   "TYPE", "SIZE", "NAME", "UID(GID)", "UGO", "MODIFIED",
                   "ACCESSED", "STATUS_CHANGED");
        av_log(NULL, AV_LOG_INFO, "%-9s %12" PRId64 " %30s %10s %s %16" PRId64 " %16" PRId64 " %16" PRId64 "\n",
               type_string(entry->type),
               entry->size,    // SIZE
               entry->name,    // 名称
               uid_and_gid,    //  
               filemode,
               entry->modification_timestamp,
               entry->access_timestamp,
               entry->status_change_timestamp);
        // 要进行entry的释放
        avio_free_directory_entry(&entry);
        cnt++;
    }

   fail:
    //关闭文件夹
    avio_close_dir(&ctx);
    return ret;
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    int ret;
    QString dir_path = "/Users/autozi01/workspc";
    av_log_set_level(AV_LOG_DEBUG);

    avformat_network_init();
    ret = list_op(dir_path.toStdString().c_str());
    avformat_network_deinit();

    return ret < 0 ? 1 : 0;
//    return a.exec();
}