int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
{
struct ex_chunk_dir excd;
int index = 16;
int useld = 0;
if (!ec->cid.cd)
return 0;
while(1) {
ecard_readbytes(&excd, ec, index, 8, useld);
index += 8;
if (c_id(&excd) == 0) {
if (!useld && ec->loader) {
useld = 1;
index = 0;
continue;
}
return 0;
}
if (c_id(&excd) == 0xf0) { /* link */
index = c_start(&excd);
continue;
}
if (c_id(&excd) == 0x80) { /* loader */
if (!ec->loader) {
ec->loader = (loader_t)kmalloc(c_len(&excd),
GFP_KERNEL);
if (ec->loader)
ecard_readbytes(ec->loader, ec,
(int)c_start(&excd),
c_len(&excd), useld);
else
return 0;
}
continue;
}
if (c_id(&excd) == id && num-- == 0)
break;
}
if (c_id(&excd) & 0x80) {
switch (c_id(&excd) & 0x70) {
case 0x70:
ecard_readbytes((unsigned char *)excd.d.string, ec,
(int)c_start(&excd), c_len(&excd),
useld);
break;
case 0x00:
break;
}
}
cd->start_offset = c_start(&excd);
memcpy(cd->d.string, excd.d.string, 256);
return 1;
}
void Normal_World(void)
{
/*while(1)
{
semi_write0("[Fast Model] This is normal world\n");
asm volatile(
".arch_extension sec\n\t"
"smc #0\n\t") ;
}*/
semi_write0("[bootwrapper] Dongli Boot Kernel!\n");
c_start();
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
(*pos)++;
return c_start(m, pos);
}
int main(int argc, char** argv)
{
if (argc != 2)
{
std::cerr << "Usage: " << argv[0] << " <file name>\n";
return 1;
}
// Open a new file and write the EBML Header. This specifies that the file
// is an EBML file, and is a Tawara document.
std::fstream stream(argv[1], std::ios::in|std::ios::out|std::ios::trunc);
tawara::EBMLElement ebml_el;
ebml_el.write(stream);
// Open a new segment in the file. This will write some initial meta-data
// and place some padding at the start of the file for final meta-data to
// be written after tracks, clusters, etc. have been written.
tawara::Segment segment;
segment.write(stream);
// Set up the segment information so it can be used while writing tracks
// and clusters.
// A UID is not required, but is highly recommended.
boost::uuids::random_generator gen;
boost::uuids::uuid uuid = gen();
std::vector<char> uuid_data(uuid.size());
std::copy(uuid.begin(), uuid.end(), uuid_data.begin());
segment.info.uid(uuid_data);
// The filename can be nice to know.
segment.info.filename(argv[1]);
// The segment's timecode scale is possibly the most important value in the
// segment meta-data data. Without it, timely playback of frames is not
// possible. It has a sensible default (defined in the Tawara specification),
// but here we set it to ten milliseconds for demonstrative purposes.
segment.info.timecode_scale(10000000);
// The segment's date should be set. It is the somewhat-awkward value of
// the number of seconds since the start of the millenium. Boost::Date_Time
// to the rescue!
bpt::ptime basis(boost::gregorian::date(2001, 1, 1));
bpt::ptime start(bpt::second_clock::local_time());
bpt::time_duration td = start - basis;
segment.info.date(td.total_seconds());
// Let's give the segment an inspirational title.
segment.info.title("Example segment");
// It sometimes helps to know what created a Tawara file.
segment.info.muxing_app("libtawara-0.1");
segment.info.writing_app("tawara_eg_write");
// Set up the tracks meta-data and write it to the file.
tawara::Tracks tracks;
// Each track is represented in the Tracks information by a TrackEntry.
// This specifies such things as the track number, the track's UID and the
// codec used.
tawara::TrackEntry::Ptr track(new tawara::TrackEntry(1, 1, "string"));
track->name("Example frames");
track->codec_name("ASCII string");
// Adding each level 1 element (only the first occurance, in the case of
// clusters) to the index makes opening the file later much faster.
segment.index.insert(std::make_pair(tracks.id(),
segment.to_segment_offset(stream.tellp())));
// Now we can write the Tracks element.
tracks.insert(track);
tracks.write(stream);
// The data itself is stored in clusters. Each cluster contains a number of
// blocks, with each block containing a single frame of data. Different
// cluster implementations are available using different optimisations.
// Here, we use the implementation that stores all its blocks in memory
// before writing them all to the file at once. As with the segment,
// clusters must be opened for writing before blocks are added. Once the
// cluster is complete, it is finalised. How many blocks each cluster
// contains is relatively flexible: the only limitation is on the range of
// block timecodes that can be stored. Each timecode is a signed 16-bit
// integer, and usually blocks have timecodes that are positive, limiting
// the range to 32767. The unit of this value is the segment's timecode
// scale. The default timecode scale therefore gives approximately 65
// seconds of total range, with 32 seconds being used.
tawara::MemoryCluster cluster;
// Again, we add the cluster to the index for faster file opening.
segment.index.insert(std::make_pair(cluster.id(),
segment.to_segment_offset(stream.tellp())));
// The cluster's timecode determines the basis for the timecodes of all
// blocks in that cluster.
bpt::ptime c_start(bpt::second_clock::local_time());
bpt::time_duration c_td = c_start - start;
cluster.timecode(c_td.total_microseconds() / 10000);
// Open the cluster for writing so we can begin adding blocks.
cluster.write(stream);
// Here, a few blocks are added.
for (int ii(1); ii <= 5; ++ii)
{
std::string frame("frame 1");
frame[6] = ii + '0';
// When creating a block, the track number must be specified. In our
// case, all blocks belong to track 1. A timecode must also be given.
// It is an offset from the cluster's timecode measured in the
// segment's timecode scale.
bpt::ptime b_start(bpt::second_clock::local_time());
bpt::time_duration b_td = b_start - c_start;
tawara::BlockElement::Ptr block(new tawara::SimpleBlock(1,
b_td.total_microseconds() / 10000));
// Here the frame data itself is added to the block
tawara::Block::FramePtr frame_ptr(
new tawara::Block::Frame(frame.begin(), frame.end()));
block->push_back(frame_ptr);
// And then the block is added to its cluster.
cluster.push_back(block);
}
// Finally, now that all blocks have been added, the cluster is finalised.
cluster.finalise(stream);
// Now we'll add another cluster, this time using the in-file cluster
// implementation.
tawara::FileCluster cluster2;
// This cluster does not need to be added to the index, as it is easily
// found during reading by skipping past the first cluster.
// Give the cluster a timecode.
c_start = bpt::second_clock::local_time();
c_td = c_start - start;
cluster2.timecode(c_td.total_microseconds() / 10000);
// Open the cluster for writing.
cluster2.write(stream);
// Add some blocks.
for (int ii(0); ii < 10; ++ii)
{
std::string frame("frame a");
frame[6] = ii + 'a';
// The block's timecode
bpt::ptime b_start(bpt::second_clock::local_time());
bpt::time_duration b_td = b_start - c_start;
tawara::BlockElement::Ptr block(new tawara::SimpleBlock(1,
b_td.total_microseconds() / 10000));
// Add the frame data to the block.
tawara::Block::FramePtr frame_ptr(
new tawara::Block::Frame(frame.begin(), frame.end()));
block->push_back(frame_ptr);
// Add the block to the cluster.
cluster2.push_back(block);
}
// Finally, now that all blocks have been added, the cluster is finalised.
cluster2.finalise(stream);
// Now that all the data has been written, the last thing to do is to
// finalise the segment.
segment.finalise(stream);
// And close the file.
stream.close();
return 0;
}
