// FIXIT: 可能需要根据吓一条记录，再对上一条记录优化
// FIXIT: 函数太长了，需要再拆分下
// 根据 sqlite db 的 schema, 获取指定表的的 schema(Template)
// Record 的 Types 是 Varint，
// 解析变长整数后与预设的 Map 进行匹配，得到相应的 SQL_TYPE
// 当连续读取数据的 SQL_TYPE 都满足 Template，则判断找到一条记录
// 再根据 Template 读取后面的 Data 区内容
// 如果完全满足当前的 RecordTmpl，则取出 Data 区的数据
// Data 区尾不能跨越到已存在数据块
// 如果仍未到达 end，则继续解析
vector<Record> parseRecordsFromFreeBlock(base::bytes_it begin,
base::bytes_it end,
vector<base::sql_type> tmpl) {
// type 1, type 2, type 3, ..., data 1, data 2, data 3, ...
// tmpl 1, tmpl 2, tmpl 3, ...|
vector<Record> records;
// FIXIT: 需要分析db文件提起模版
// tmpl = testTmpl();
base::bytes_it pos;
for (pos = begin; pos < end;) {
vector<RecordFormat> rf = matchByesForTmpl(pos, end, tmpl);
if (!rf.empty()) {
// 如果匹配模版
// pos += calcHeaderSize(rf);
base::bytes_it tmp_pos = pos + calcHeaderSize(rf);
Record record;
for (vector<RecordFormat>::iterator rf_pos = rf.begin();
rf_pos != rf.end(); ++rf_pos) {
// 避免取 Data 时超出 FreeBlock 边界
string content;
if (tmp_pos > end) {
content = "[Missed]";
} else {
base::bytes_it end_it = tmp_pos + rf_pos->contentSize;;
if (end_it > end) {
end_it = end;
}
base::bytes_t bytes = base::bytes_t(tmp_pos, end_it);
if (bytes.empty()) {
content = "[NULL]";
} else {
content =
getStringFor(rf_pos->serialType, bytes);
}
}
record.push_back(content);
// 如果是 pos += rf_pos->contentSize，可能会跳过一些数据
tmp_pos += rf_pos->contentSize;
}
records.push_back(record);
pos += calcHeaderSize(rf);
} else {
++pos;
}
}
return records;
}
BString MediaString::getStringFor(
const media_format &format,
bool complete) {
D_METHOD(("MediaString::getStringFor(media_format)\n"));
BString s = getStringFor(format.type, complete);
switch (format.type) {
case B_MEDIA_RAW_AUDIO: {
BString formatInfo = getStringFor(format.u.raw_audio, complete);
if (formatInfo.Length() > 0)
s << " (" << formatInfo << ")";
break;
}
case B_MEDIA_RAW_VIDEO: {
BString formatInfo = getStringFor(format.u.raw_video, complete);
if (formatInfo.Length() > 0)
s << " (" << formatInfo << ")";
break;
}
case B_MEDIA_ENCODED_AUDIO: {
BString formatInfo = getStringFor(format.u.encoded_audio, complete);
if (formatInfo.Length() > 0)
s << " (" << formatInfo << ")";
break;
}
case B_MEDIA_ENCODED_VIDEO: {
BString formatInfo = getStringFor(format.u.encoded_video, complete);
if (formatInfo.Length() > 0)
s << " (" << formatInfo << ")";
break;
}
case B_MEDIA_MULTISTREAM: {
BString formatInfo = getStringFor(format.u.multistream, complete);
if (formatInfo.Length() > 0)
s << " (" << formatInfo << ")";
break;
}
default: {
break;
}
}
return s;
}
