size_t wxChmInputStream::OnSysRead(void *buffer, size_t bufsize)
{
if ( m_pos >= m_size )
{
m_lasterror = wxSTREAM_EOF;
return 0;
}
m_lasterror = wxSTREAM_NO_ERROR;
// If the rest to read from the stream is less
// than the buffer size, then only read the rest
if ( m_pos + bufsize > m_size )
bufsize = m_size - m_pos;
if (m_contentStream->SeekI(m_pos) == wxInvalidOffset)
{
m_lasterror = wxSTREAM_EOF;
return 0;
}
size_t read = m_contentStream->Read(buffer, bufsize).LastRead();
m_pos += read;
if (m_contentStream->SeekI(m_pos) == wxInvalidOffset)
{
m_lasterror = wxSTREAM_READ_ERROR;
return 0;
}
if (read != bufsize)
m_lasterror = m_contentStream->GetLastError();
return read;
}
bool wxSVGHandler::DoCanRead(wxInputStream& stream) {
unsigned char hdr[5];
if (!stream.Read(hdr, WXSIZEOF(hdr))) // it's ok to modify the stream position here
return false;
return hdr[0] == '<' && hdr[1] == '?' && hdr[2] == 'x' && hdr[3] == 'm' && hdr[4] == 'l'; // <?xml
}
bool wxPNGHandler::DoCanRead( wxInputStream& stream )
{
unsigned char hdr[4];
if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
return false;
return memcmp(hdr, "\211PNG", WXSIZEOF(hdr)) == 0;
}
bool wxTarHeaderBlock::Read(wxInputStream& in)
{
bool ok = true;
for (int id = 0; id < TAR_NUMFIELDS && ok; id++)
ok = in.Read(Get(id), Len(id)).LastRead() == Len(id);
return ok;
}
bool wxJPEGHandler::DoCanRead( wxInputStream& stream )
{
unsigned char hdr[2];
if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
return false;
return hdr[0] == 0xFF && hdr[1] == 0xD8;
}
bool wxPNGHandler::DoCanRead( wxInputStream& stream )
{
unsigned char hdr[4];
if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) // it's ok to modify the stream position here
return false;
return memcmp(hdr, "\211PNG", WXSIZEOF(hdr)) == 0;
}
bool wxJPEGHandler::DoCanRead( wxInputStream& stream )
{
unsigned char hdr[2];
if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) // it's ok to modify the stream position here
return false;
return hdr[0] == 0xFF && hdr[1] == 0xD8;
}
/** @brief Read an int from an input stream
*
* @param in wxInputStream&
* @param out_Int int&
* @return bool
*
*/
static bool ReadInt( wxInputStream& in, int& out_Int )
{
int val = 0;
if (!in.CanRead())
return false;
in.Read(&val, sizeof(val));
out_Int = val;
return true;
}
/** @brief Read a long long from an input stream
*
* @param in wxInputStream&
* @param out_LongLong long long&
* @return bool
*
*/
static bool ReadLongLong( wxInputStream& in, long long& out_LongLong )
{
long long val = 0;
if (!in.CanRead())
return false;
in.Read(&val, sizeof(val));
out_LongLong = val;
return true;
}
void MyPipeFrame::DoGetFromStream(wxTextCtrl *text, wxInputStream& in)
{
while ( in.CanRead() )
{
char buffer[4096];
buffer[in.Read(buffer, WXSIZEOF(buffer) - 1).LastRead()] = '\0';
text->AppendText(buffer);
}
}
bool HexView::Load(wxInputStream& iStr)
{
wxFileOffset strSize = iStr.SeekI(0, wxFromEnd);
iStr.SeekI(0);
unsigned char* data = new unsigned char[strSize];
iStr.Read(data, strSize);
Load(data, strSize);
delete [] data;
return true;
}
// recognize the MXF JPEG 2000 starting box
bool wxMXFHandler::DoCanRead( wxInputStream& stream )
{
unsigned char hdr[4];
if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
return false;
return (hdr[0] == 0x06 &&
hdr[1] == 0x0E &&
hdr[2] == 0x2B &&
hdr[3] == 0x34);
}
wxString FbImportBook::CalcMd5(wxInputStream& stream)
{
const size_t BUFSIZE = 1024;
unsigned char buf[BUFSIZE];
md5_context md5;
md5_starts( &md5 );
bool eof;
do {
size_t len = stream.Read(buf, BUFSIZE).LastRead();
eof = (len < BUFSIZE);
md5_update( &md5, buf, (int) len );
} while (!eof);
return Md5(md5);
}
// recognize the JPEG 2000 starting box
bool wxJP2Handler::DoCanRead( wxInputStream& stream )
{
unsigned char hdr[23];
if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
return false;
return (hdr[0] == 0x00 &&
hdr[1] == 0x00 &&
hdr[2] == 0x00 &&
hdr[3] == 0x0C &&
hdr[4] == 0x6A &&
hdr[5] == 0x50 &&
hdr[6] == 0x20 &&
hdr[7] == 0x20 &&
hdr[20] == 0x6A &&
hdr[21] == 0x70 &&
hdr[22] == 0x32);
}
/* static */ bool IStateStore::LoadString(wxInputStream& input, wxString& txt)
{
wxInt32 len = 0;
bool ret = LoadSimpleType<wxInt32>(input, len);
if (ret)
{
len *= sizeof(wchar_t);
wchar_t* buf = (wchar_t*) malloc(len);
input.Read(buf, len);
if (CheckLastRead(input, len))
{
txt = wxString(buf, len / sizeof(wchar_t));
ret = true;
}
free(buf);
}
return ret;
}
size_t wxChmInputStream::OnSysRead(void *buffer, size_t bufsize)
{
if ( m_pos >= m_size )
{
m_lasterror = wxSTREAM_EOF;
return 0;
}
m_lasterror = wxSTREAM_NO_ERROR;
// If the rest to read from the stream is less
// than the buffer size, than only read the rest
if ( m_pos + bufsize > m_size )
bufsize = m_size - m_pos;
m_contentStream->SeekI(m_pos);
m_contentStream->Read(buffer, bufsize);
m_pos +=bufsize;
m_contentStream->SeekI(m_pos);
return bufsize;
}
/** @brief Read a string from an input stream
*
* @param in wxInputStream&
* @param out_String wxString&
* @return bool
*
*/
static bool ReadString( wxInputStream& in, wxString& out_String )
{
int len;
if (!ReadInt(in, len))
return false;
if (len == 0)
{
out_String = out_String.Truncate(0);
return true;
}
if (!in.CanRead())
return false;
char buffer[len + 1];
in.Read( buffer, len );
buffer[len] = '\0';
out_String = wxString::FromUTF8(buffer);
return true;
}
void
wxMemoryInputStream::InitFromStream(wxInputStream& stream, wxFileOffset lenFile)
{
if ( lenFile == wxInvalidOffset )
lenFile = stream.GetLength();
if ( lenFile == wxInvalidOffset )
{
m_i_streambuf = NULL;
m_lasterror = wxSTREAM_EOF;
return;
}
const size_t len = wx_truncate_cast(size_t, lenFile);
wxASSERT_MSG( (wxFileOffset)len == lenFile, wxT("huge files not supported") );
m_i_streambuf = new wxStreamBuffer(wxStreamBuffer::read);
m_i_streambuf->SetBufferIO(len); // create buffer
stream.Read(m_i_streambuf->GetBufferStart(), len);
m_i_streambuf->SetIntPosition(0); // seek to start pos
m_i_streambuf->Fixed(true);
m_length = stream.LastRead();
}
bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height,
int bpp, int ncolors, int comp,
wxFileOffset bmpOffset, wxInputStream& stream,
bool verbose, bool IsBmp, bool hasPalette)
{
wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0, amask = 0;
int rshift = 0, gshift = 0, bshift = 0, ashift = 0;
int rbits = 0, gbits = 0, bbits = 0;
wxInt32 dbuf[4];
wxInt8 bbuf[4];
wxUint8 aByte;
wxUint16 aWord;
// allocate space for palette if needed:
BMPPalette *cmap;
if ( bpp < 16 )
{
cmap = new BMPPalette[ncolors];
if ( !cmap )
{
if (verbose)
{
wxLogError(_("BMP: Couldn't allocate memory."));
}
return false;
}
}
else // no palette
{
cmap = NULL;
}
wxON_BLOCK_EXIT1(&BMPPalette::Free, cmap);
// destroy existing here instead of:
image->Destroy();
image->Create(width, height);
unsigned char *ptr = image->GetData();
if ( !ptr )
{
if ( verbose )
{
wxLogError( _("BMP: Couldn't allocate memory.") );
}
return false;
}
unsigned char *alpha;
if ( bpp == 32 )
{
// tell the image to allocate an alpha buffer
image->SetAlpha();
alpha = image->GetAlpha();
if ( !alpha )
{
if ( verbose )
{
wxLogError(_("BMP: Couldn't allocate memory."));
}
return false;
}
}
else // no alpha
{
alpha = NULL;
}
// Reading the palette, if it exists:
if ( bpp < 16 && ncolors != 0 )
{
unsigned char* r = new unsigned char[ncolors];
unsigned char* g = new unsigned char[ncolors];
unsigned char* b = new unsigned char[ncolors];
for (int j = 0; j < ncolors; j++)
{
if (hasPalette)
{
stream.Read(bbuf, 4);
cmap[j].b = bbuf[0];
cmap[j].g = bbuf[1];
cmap[j].r = bbuf[2];
r[j] = cmap[j].r;
g[j] = cmap[j].g;
b[j] = cmap[j].b;
}
else
{
//used in reading .ico file mask
r[j] = cmap[j].r =
g[j] = cmap[j].g =
b[j] = cmap[j].b = ( j ? 255 : 0 );
}
}
#if wxUSE_PALETTE
// Set the palette for the wxImage
image->SetPalette(wxPalette(ncolors, r, g, b));
#endif // wxUSE_PALETTE
delete[] r;
delete[] g;
delete[] b;
}
else if ( bpp == 16 || bpp == 32 )
{
if ( comp == BI_BITFIELDS )
{
int bit;
stream.Read(dbuf, 4 * 3);
rmask = wxINT32_SWAP_ON_BE(dbuf[0]);
gmask = wxINT32_SWAP_ON_BE(dbuf[1]);
bmask = wxINT32_SWAP_ON_BE(dbuf[2]);
// find shift amount (Least significant bit of mask)
for (bit = bpp-1; bit>=0; bit--)
{
if (bmask & (1 << bit))
bshift = bit;
if (gmask & (1 << bit))
gshift = bit;
if (rmask & (1 << bit))
rshift = bit;
}
// Find number of bits in mask (MSB-LSB+1)
for (bit = 0; bit < bpp; bit++)
{
if (bmask & (1 << bit))
bbits = bit-bshift+1;
if (gmask & (1 << bit))
gbits = bit-gshift+1;
if (rmask & (1 << bit))
rbits = bit-rshift+1;
}
}
else if ( bpp == 16 )
{
rmask = 0x7C00;
gmask = 0x03E0;
bmask = 0x001F;
rshift = 10;
gshift = 5;
bshift = 0;
rbits = 5;
gbits = 5;
bbits = 5;
}
else if ( bpp == 32 )
{
rmask = 0x00FF0000;
gmask = 0x0000FF00;
bmask = 0x000000FF;
amask = 0xFF000000;
ashift = 24;
rshift = 16;
gshift = 8;
bshift = 0;
rbits = 8;
gbits = 8;
bbits = 8;
}
}
/*
* Reading the image data
*/
if ( IsBmp )
{
// NOTE: seeking a positive amount in wxFromCurrent mode allows us to
// load even non-seekable streams (see wxInputStream::SeekI docs)!
const wxFileOffset pos = stream.TellI();
if (pos != wxInvalidOffset && bmpOffset > pos)
if (stream.SeekI(bmpOffset - pos, wxFromCurrent) == wxInvalidOffset)
return false;
//else: icon, just carry on
}
unsigned char *data = ptr;
/* set the whole image to the background color */
if ( bpp < 16 && (comp == BI_RLE4 || comp == BI_RLE8) )
{
for (int i = 0; i < width * height; i++)
{
*ptr++ = cmap[0].r;
*ptr++ = cmap[0].g;
*ptr++ = cmap[0].b;
}
ptr = data;
}
int linesize = ((width * bpp + 31) / 32) * 4;
/* BMPs are stored upside down */
for ( int line = (height - 1); line >= 0; line-- )
{
int linepos = 0;
for ( int column = 0; column < width ; )
{
if ( bpp < 16 )
{
linepos++;
aByte = stream.GetC();
if ( bpp == 1 )
{
for (int bit = 0; bit < 8 && column < width; bit++)
{
int index = ((aByte & (0x80 >> bit)) ? 1 : 0);
ptr[poffset] = cmap[index].r;
ptr[poffset + 1] = cmap[index].g;
ptr[poffset + 2] = cmap[index].b;
column++;
}
}
else if ( bpp == 4 )
{
if ( comp == BI_RLE4 )
{
wxUint8 first;
first = aByte;
aByte = stream.GetC();
if ( first == 0 )
{
if ( aByte == 0 )
{
if ( column > 0 )
column = width;
}
else if ( aByte == 1 )
{
column = width;
line = -1;
}
else if ( aByte == 2 )
{
aByte = stream.GetC();
column += aByte;
linepos = column * bpp / 4;
aByte = stream.GetC();
line -= aByte; // upside down
}
else
{
int absolute = aByte;
wxUint8 nibble[2] ;
int readBytes = 0 ;
for (int k = 0; k < absolute; k++)
{
if ( !(k % 2 ) )
{
++readBytes ;
aByte = stream.GetC();
nibble[0] = (wxUint8)( (aByte & 0xF0) >> 4 ) ;
nibble[1] = (wxUint8)( aByte & 0x0F ) ;
}
ptr[poffset ] = cmap[nibble[k%2]].r;
ptr[poffset + 1] = cmap[nibble[k%2]].g;
ptr[poffset + 2] = cmap[nibble[k%2]].b;
column++;
if ( k % 2 )
linepos++;
}
if ( readBytes & 0x01 )
aByte = stream.GetC();
}
}
else
{
wxUint8 nibble[2] ;
nibble[0] = (wxUint8)( (aByte & 0xF0) >> 4 ) ;
nibble[1] = (wxUint8)( aByte & 0x0F ) ;
for ( int l = 0; l < first && column < width; l++ )
{
ptr[poffset ] = cmap[nibble[l%2]].r;
ptr[poffset + 1] = cmap[nibble[l%2]].g;
ptr[poffset + 2] = cmap[nibble[l%2]].b;
column++;
if ( l % 2 )
linepos++;
}
}
}
/**
* Calculates the checksums from the given stream.
*
* @param in Input stream from which the data will be extracted to
* compute the checksum. The data are extracted until the end
* of the stream is reached.
* @param checksums Array of checksums to calculate.
* @param sumValues The calculated values of the checksums from the input
* stream. The array is erased first before adding results.
* On success <CODE>ArrayChecksum.GetCount() == sumValues.GetCount()</CODE>,
* on failure, <CODE>sumValues</CODE> should be empty.
* @return <UL>
* <LI><CODE>Ok</CODE> if the checksum has been successfully calculated.</Li>
* <LI><CODE>ReadError</CODE> if a read error has occured.</LI>
* <LI><CODE>Canceled</CODE> if the user has canceled the calculation.</LI>
* </UL>
*/
ChecksumCalculator::State ChecksumCalculator::calculate(wxInputStream& in,
const ArrayChecksum& checksums,
wxArrayString& sumValues)
{
// Check if the input stream is valid.
if (!in.IsOk())
return ReadError;
// Check if at least a checksum instance is OK.
bool aInstanceOK = false;
size_t i = 0;
size_t s = checksums.GetCount();
while (!aInstanceOK && i < s)
if (checksums[i] != NULL)
aInstanceOK = true;
else
i++;
if (!aInstanceOK)
return ReadError;
// Initializes the buffer.
const size_t bufSize = getBufferSize();
wxByte* buff = new wxByte[bufSize];
// Calculating the checksum.
ChecksumProgress* p = getChecksumProgress();
bool canceled = false;
size_t read;
wxStreamError lastError = wxSTREAM_NO_ERROR;
s = checksums.GetCount();
for (i = 0; i < s; i++)
if (checksums[i] != NULL)
checksums[i]->reset();
while (!canceled && !in.Eof() && lastError == wxSTREAM_NO_ERROR)
{
in.Read(buff, bufSize);
read = in.LastRead();
if (read > 0 && read <= bufSize)
{
for (i = 0; i < s; i++)
if (checksums[i] != NULL)
checksums[i]->update(buff, read);
if (p != NULL)
p->update(read, canceled);
}
lastError = in.GetLastError();
}
// Cleans-up the memory
delete[] buff;
if (canceled)
return CanceledByUser;
if (lastError != wxSTREAM_NO_ERROR && lastError != wxSTREAM_EOF)
return ReadError;
sumValues.Empty();
for (i = 0; i < s; i++)
if (checksums[i] != NULL)
sumValues.Add(checksums[i]->getValue());
else
sumValues.Add(wxEmptyString);
return Ok;
}
wxStreamError wxBackingFileImpl::ReadAt(wxFileOffset pos,
void *buffer,
size_t *size)
{
size_t reqestedSize = *size;
*size = 0;
// size1 is the number of bytes it will read directly from the backing
// file. size2 is any remaining bytes not yet backed, these are returned
// from the buffer or read from the parent stream.
size_t size1, size2;
if (pos + reqestedSize <= m_filelen + size_t(0)) {
size1 = reqestedSize;
size2 = 0;
} else if (pos < m_filelen) {
size1 = size_t(m_filelen - pos);
size2 = reqestedSize - size1;
} else {
size1 = 0;
size2 = reqestedSize;
}
if (pos < 0)
return wxSTREAM_READ_ERROR;
// read the backing file
if (size1) {
if (m_file.Seek(pos) == wxBadSeek)
return wxSTREAM_READ_ERROR;
ssize_t n = m_file.Read(buffer, size1);
if (n > 0) {
*size = n;
pos += n;
}
if (*size < size1)
return wxSTREAM_READ_ERROR;
}
// read from the buffer or parent stream
if (size2)
{
while (*size < reqestedSize)
{
// if pos is further ahead than the parent has been read so far,
// then read forward in the parent stream
while (pos - m_filelen + size_t(0) >= m_buflen)
{
// if the parent is small enough, don't use a backing file
// just the buffer memory
if (!m_stream && m_filelen == 0)
return m_parenterror;
// before refilling the buffer write out the current buffer
// to the backing file if there is anything in it
if (m_buflen)
{
if (!m_file.IsOpened())
if (!wxCreateTempFile(m_prefix, &m_file, &m_filename))
return wxSTREAM_READ_ERROR;
if (m_file.Seek(m_filelen) == wxBadSeek)
return wxSTREAM_READ_ERROR;
size_t count = m_file.Write(m_buf, m_buflen);
m_filelen += count;
if (count < m_buflen) {
wxDELETE(m_stream);
if (count > 0) {
wxDELETEA(m_buf);
m_buflen = 0;
}
m_parenterror = wxSTREAM_READ_ERROR;
return m_parenterror;
}
m_buflen = 0;
if (!m_stream) {
wxDELETEA(m_buf);
}
}
if (!m_stream)
return m_parenterror;
// refill buffer
m_buflen = m_stream->Read(m_buf, m_bufsize).LastRead();
if (m_buflen < m_bufsize) {
m_parenterror = m_stream->GetLastError();
if (m_parenterror == wxSTREAM_NO_ERROR)
m_parenterror = wxSTREAM_EOF;
wxDELETE(m_stream);
}
}
// copy to the user's buffer
size_t start = size_t(pos - m_filelen);
size_t len = wxMin(m_buflen - start, reqestedSize - *size);
memcpy((char*)buffer + *size, m_buf + start, len);
*size += len;
pos += len;
}
}
return wxSTREAM_NO_ERROR;
}
bool wxSHA384::Hash(wxInputStream &input, wxSHA384Hash &hash)
{
// Get and verify the length of the stream
m_length = input.GetLength();
if((m_length == wxInvalidOffset) || (m_length == 0))
return false;
// Initialize H[0,..,7]
hash.H[0] = SHA384_INIT_0;
hash.H[1] = SHA384_INIT_1;
hash.H[2] = SHA384_INIT_2;
hash.H[3] = SHA384_INIT_3;
hash.H[4] = SHA384_INIT_4;
hash.H[5] = SHA384_INIT_5;
H6 = SHA384_INIT_6;
H7 = SHA384_INIT_7;
// Initialize data variables
m_readed = 0;
m_N = (m_length / SHA384_DATA_PAD_SPACE_1) + 1;
for(i = 0; i < m_N; i++)
{
// Initialize temporary HASH value
a = hash.H[0];
b = hash.H[1];
c = hash.H[2];
d = hash.H[3];
e = hash.H[4];
f = hash.H[5];
g = H6;
h = H7;
// First step SHA384 [0,..,15]
size_t t;
for(t = 0; t < 16; t++)
{
// Read data to W[t]
if((input.Read(&W[t], GetWSize()).LastRead() != GetWSize()) && ((m_length - m_readed) != input.LastRead()))
return false;
W[t] = wxUINT64_SWAP_ON_LE(W[t].GetValue());
// Wt = Mt(i)
M(t, input.LastRead());
m_readed += input.LastRead();
ComputeTempHash(t);
}
// Second step SHA384 [16,..,79]
for(; t < 80; t++)
{
W16_79(t);
ComputeTempHash(t);
}
// Update HASH
hash.H[0] += a;
hash.H[1] += b;
hash.H[2] += c;
hash.H[3] += d;
hash.H[4] += e;
hash.H[5] += f;
H6 += g;
H7 += h;
}
return true;
}
bool wxAnimation::Load(wxInputStream &stream, wxAnimationType type)
{
UnRef();
char anim_type[12];
switch (type)
{
case wxANIMATION_TYPE_GIF:
strcpy(anim_type, "gif");
break;
case wxANIMATION_TYPE_ANI:
strcpy(anim_type, "ani");
break;
default:
anim_type[0] = '\0';
break;
}
// create a GdkPixbufLoader
GError *error = NULL;
GdkPixbufLoader *loader;
if (type != wxANIMATION_TYPE_INVALID && type != wxANIMATION_TYPE_ANY)
loader = gdk_pixbuf_loader_new_with_type(anim_type, &error);
else
loader = gdk_pixbuf_loader_new();
if (!loader ||
error != NULL) // even if the loader was allocated, an error could have happened
{
wxLogDebug(wxT("Could not create the loader for '%s' animation type: %s"),
anim_type, error->message);
return false;
}
// connect to loader signals
g_signal_connect(loader, "area-updated", G_CALLBACK(gdk_pixbuf_area_updated), this);
guchar buf[2048];
bool data_written = false;
while (stream.IsOk())
{
// read a chunk of data
if (!stream.Read(buf, sizeof(buf)) &&
stream.GetLastError() != wxSTREAM_EOF) // EOF is OK for now
{
// gdk_pixbuf_loader_close wants the GError == NULL
gdk_pixbuf_loader_close(loader, NULL);
return false;
}
// fetch all data into the loader
if (!gdk_pixbuf_loader_write(loader, buf, stream.LastRead(), &error))
{
wxLogDebug(wxT("Could not write to the loader: %s"), error->message);
// gdk_pixbuf_loader_close wants the GError == NULL
gdk_pixbuf_loader_close(loader, NULL);
return false;
}
data_written = true;
}
if (!data_written)
{
wxLogDebug("Could not read data from the stream...");
return false;
}
// load complete: gdk_pixbuf_loader_close will now check if the data we
// wrote inside the pixbuf loader does make sense and will give an error
// if it doesn't (because of a truncated file, corrupted data or whatelse)
if (!gdk_pixbuf_loader_close(loader, &error))
{
wxLogDebug(wxT("Could not close the loader: %s"), error->message);
return false;
}
// wait until we get the last area_updated signal
return data_written;
}
/* internal mini-search for a box signature */
int
jpeg2000_file_parse(wxInputStream& stream, unsigned long int filepoint, unsigned long int filelimit, int level,
char *scansign, unsigned long int *scanpoint)
{
unsigned long int LBox = 0x00000000;
char TBox[5] = "\0\0\0\0";
int8byte XLBox = 0x0000000000000000;
unsigned long int box_length = 0;
int last_box = 0, box_num = 0;
int box_type = ANY_BOX;
unsigned char fourbytes[4];
int box_number = 0;
/* cycle all over the file */
box_num = 0;
last_box = 0;
while (!last_box) {
/* do not exceed file limit */
if (filepoint >= filelimit)
return (0);
/* seek on file */
if (stream.SeekI(filepoint, wxFromStart) == wxInvalidOffset)
return (-1);
/* read the mandatory LBox, 4 bytes */
if (!stream.Read(fourbytes, 4)) {
wxLogError(wxT("Problem reading LBox from the file (file ended?)"));
return -1;
};
LBox = STREAM_TO_UINT32(fourbytes, 0);
/* read the mandatory TBox, 4 bytes */
if (!stream.Read(TBox, 4)) {
wxLogError(wxT("Problem reading TBox from the file (file ended?)"));
return -1;
};
/* look if scansign is got */
if ((scansign != NULL) && (memcmp(TBox, scansign, 4) == 0)) {
/* hack/exploit */
// stop as soon as you find the level-th codebox
if (box_number == level) {
memcpy(scansign, " ", 4);
*scanpoint = filepoint;
return (0);
} else
box_number++;
};
/* determine the box type */
for (box_type = JP_BOX; box_type < UNK_BOX; box_type++)
if (memcmp(TBox, jpeg2000box[box_type].value, 4) == 0)
break;
/* read the optional XLBox, 8 bytes */
if (LBox == 1) {
if (!stream.Read(&XLBox, 8)) {
wxLogError(wxT("Problem reading XLBox from the file (file ended?)"));
return -1;
};
box_length = (unsigned long int) BYTE_SWAP8(XLBox);
} else if (LBox == 0x00000000) {
/* last box in file */
last_box = 1;
box_length = filelimit - filepoint;
} else
box_length = LBox;
/* go deep in the box */
jpeg2000_box_handler_function((jpeg2000boxtype) box_type,
stream, (LBox == 1) ? (filepoint + 16) : (filepoint + 8),
filepoint + box_length, level, scansign, scanpoint);
/* if it's a superbox go inside it */
if (jpeg2000box[box_type].sbox)
jpeg2000_file_parse(stream, (LBox == 1) ? (filepoint + 16) : (filepoint + 8), filepoint + box_length,
level, scansign, scanpoint);
/* increment box number and filepoint*/
box_num++;
filepoint += box_length;
};
/* all good */
return (0);
}
// load the jpeg2000 file format
bool wxJPEG2000Handler::LoadFile(wxImage *image, wxInputStream& stream, bool verbose, int index)
{
opj_dparameters_t parameters; /* decompression parameters */
opj_event_mgr_t event_mgr; /* event manager */
opj_image_t *opjimage = NULL;
unsigned char *src = NULL;
unsigned char *ptr;
int file_length, jp2c_point, jp2h_point;
unsigned long int jp2hboxlen, jp2cboxlen;
opj_codestream_info_t cstr_info; /* Codestream information structure */
unsigned char hdr[24];
int jpfamform;
// destroy the image
image->Destroy();
/* read the beginning of the file to check the type */
if (!stream.Read(hdr, WXSIZEOF(hdr)))
return false;
if ((jpfamform = jpeg2000familytype(hdr, WXSIZEOF(hdr))) < 0)
return false;
stream.SeekI(0, wxFromStart);
/* handle to a decompressor */
opj_dinfo_t* dinfo = NULL;
opj_cio_t *cio = NULL;
/* configure the event callbacks */
memset(&event_mgr, 0, sizeof(opj_event_mgr_t));
event_mgr.error_handler = jpeg2000_error_callback;
event_mgr.warning_handler = jpeg2000_warning_callback;
event_mgr.info_handler = jpeg2000_info_callback;
/* set decoding parameters to default values */
opj_set_default_decoder_parameters(¶meters);
/* prepare parameters */
strncpy(parameters.infile, "", sizeof(parameters.infile) - 1);
strncpy(parameters.outfile, "", sizeof(parameters.outfile) - 1);
parameters.decod_format = jpfamform;
parameters.cod_format = BMP_DFMT;
if (m_reducefactor)
parameters.cp_reduce = m_reducefactor;
if (m_qualitylayers)
parameters.cp_layer = m_qualitylayers;
/*if (n_components)
parameters. = n_components;*/
/* JPWL only */
#ifdef USE_JPWL
parameters.jpwl_exp_comps = m_expcomps;
parameters.jpwl_max_tiles = m_maxtiles;
parameters.jpwl_correct = m_enablejpwl;
#endif /* USE_JPWL */
/* get a decoder handle */
if (jpfamform == JP2_CFMT || jpfamform == MJ2_CFMT)
dinfo = opj_create_decompress(CODEC_JP2);
else if (jpfamform == J2K_CFMT)
dinfo = opj_create_decompress(CODEC_J2K);
else
return false;
/* find length of the stream */
stream.SeekI(0, wxFromEnd);
file_length = (int) stream.TellI();
/* it's a movie */
if (jpfamform == MJ2_CFMT) {
/* search for the first codestream box and the movie header box */
jp2c_point = searchjpeg2000c(stream, file_length, m_framenum);
jp2h_point = searchjpeg2000headerbox(stream, file_length);
// read the jp2h box and store it
stream.SeekI(jp2h_point, wxFromStart);
stream.Read(&jp2hboxlen, sizeof(unsigned long int));
jp2hboxlen = BYTE_SWAP4(jp2hboxlen);
// read the jp2c box and store it
stream.SeekI(jp2c_point, wxFromStart);
stream.Read(&jp2cboxlen, sizeof(unsigned long int));
jp2cboxlen = BYTE_SWAP4(jp2cboxlen);
// malloc memory source
src = (unsigned char *) malloc(jpeg2000headSIZE + jp2hboxlen + jp2cboxlen);
// copy the jP and ftyp
memcpy(src, jpeg2000head, jpeg2000headSIZE);
// copy the jp2h
stream.SeekI(jp2h_point, wxFromStart);
stream.Read(&src[jpeg2000headSIZE], jp2hboxlen);
// copy the jp2c
stream.SeekI(jp2c_point, wxFromStart);
stream.Read(&src[jpeg2000headSIZE + jp2hboxlen], jp2cboxlen);
} else if (jpfamform == JP2_CFMT || jpfamform == J2K_CFMT) {
/* It's a plain image */
/* get data */
stream.SeekI(0, wxFromStart);
src = (unsigned char *) malloc(file_length);
stream.Read(src, file_length);
} else
return false;
/* catch events using our callbacks and give a local context */
opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);
/* setup the decoder decoding parameters using user parameters */
opj_setup_decoder(dinfo, ¶meters);
/* open a byte stream */
if (jpfamform == MJ2_CFMT)
cio = opj_cio_open((opj_common_ptr)dinfo, src, jpeg2000headSIZE + jp2hboxlen + jp2cboxlen);
else if (jpfamform == JP2_CFMT || jpfamform == J2K_CFMT)
cio = opj_cio_open((opj_common_ptr)dinfo, src, file_length);
else {
free(src);
return false;
}
/* decode the stream and fill the image structure */
opjimage = opj_decode_with_info(dinfo, cio, &cstr_info);
if (!opjimage) {
wxMutexGuiEnter();
wxLogError(wxT("JPEG 2000 failed to decode image!"));
wxMutexGuiLeave();
opj_destroy_decompress(dinfo);
opj_cio_close(cio);
free(src);
return false;
}
/* close the byte stream */
opj_cio_close(cio);
/*
- At this point, we have the structure "opjimage" that is filled with decompressed
data, as processed by the OpenJPEG decompression engine
- We need to fill the class "image" with the proper pixel sample values
*/
{
int shiftbpp;
int c, tempcomps;
// check components number
if (m_components > opjimage->numcomps)
m_components = opjimage->numcomps;
// check image depth (only on the first one, for now)
if (m_components)
shiftbpp = opjimage->comps[m_components - 1].prec - 8;
else
shiftbpp = opjimage->comps[0].prec - 8;
// prepare image size
if (m_components)
image->Create(opjimage->comps[m_components - 1].w, opjimage->comps[m_components - 1].h, true);
else
image->Create(opjimage->comps[0].w, opjimage->comps[0].h, true);
// access image raw data
image->SetMask(false);
ptr = image->GetData();
// workaround for components different from 1 or 3
if ((opjimage->numcomps != 1) && (opjimage->numcomps != 3)) {
#ifndef __WXGTK__
wxMutexGuiEnter();
#endif /* __WXGTK__ */
wxLogMessage(wxT("JPEG2000: weird number of components"));
#ifndef __WXGTK__
wxMutexGuiLeave();
#endif /* __WXGTK__ */
tempcomps = 1;
} else
tempcomps = opjimage->numcomps;
// workaround for subsampled components
for (c = 1; c < tempcomps; c++) {
if ((opjimage->comps[c].w != opjimage->comps[c - 1].w) || (opjimage->comps[c].h != opjimage->comps[c - 1].h)) {
tempcomps = 1;
break;
}
}
// workaround for different precision components
for (c = 1; c < tempcomps; c++) {
if (opjimage->comps[c].bpp != opjimage->comps[c - 1].bpp) {
tempcomps = 1;
break;
}
}
// only one component selected
if (m_components)
tempcomps = 1;
// RGB color picture
if (tempcomps == 3) {
int row, col;
int *r = opjimage->comps[0].data;
int *g = opjimage->comps[1].data;
int *b = opjimage->comps[2].data;
if (shiftbpp > 0) {
for (row = 0; row < opjimage->comps[0].h; row++) {
for (col = 0; col < opjimage->comps[0].w; col++) {
*(ptr++) = (*(r++)) >> shiftbpp;
*(ptr++) = (*(g++)) >> shiftbpp;
*(ptr++) = (*(b++)) >> shiftbpp;
}
}
} else if (shiftbpp < 0) {
for (row = 0; row < opjimage->comps[0].h; row++) {
for (col = 0; col < opjimage->comps[0].w; col++) {
*(ptr++) = (*(r++)) << -shiftbpp;
*(ptr++) = (*(g++)) << -shiftbpp;
*(ptr++) = (*(b++)) << -shiftbpp;
}
}
} else {
for (row = 0; row < opjimage->comps[0].h; row++) {
for (col = 0; col < opjimage->comps[0].w; col++) {
*(ptr++) = *(r++);
*(ptr++) = *(g++);
*(ptr++) = *(b++);
}
}
}
}
bool wxXmlDocument::Load(wxInputStream& stream, const wxString& encoding, int flags)
{
#if wxUSE_UNICODE
(void)encoding;
#else
m_encoding = encoding;
#endif
const size_t BUFSIZE = 1024;
char buf[BUFSIZE];
wxXmlParsingContext ctx;
bool done;
XML_Parser parser = XML_ParserCreate(NULL);
ctx.root = ctx.node = NULL;
ctx.encoding = wxT("UTF-8"); // default in absence of encoding=""
ctx.conv = NULL;
#if !wxUSE_UNICODE
if ( encoding.CmpNoCase(wxT("UTF-8")) != 0 )
ctx.conv = new wxCSConv(encoding);
#endif
ctx.removeWhiteOnlyNodes = (flags & wxXMLDOC_KEEP_WHITESPACE_NODES) == 0;
XML_SetUserData(parser, (void*)&ctx);
XML_SetElementHandler(parser, StartElementHnd, EndElementHnd);
XML_SetCharacterDataHandler(parser, TextHnd);
XML_SetStartCdataSectionHandler(parser, StartCdataHnd);
XML_SetCommentHandler(parser, CommentHnd);
XML_SetDefaultHandler(parser, DefaultHnd);
XML_SetUnknownEncodingHandler(parser, UnknownEncodingHnd, NULL);
bool ok = true;
do
{
size_t len = stream.Read(buf, BUFSIZE).LastRead();
done = (len < BUFSIZE);
if (!XML_Parse(parser, buf, len, done))
{
wxString error(XML_ErrorString(XML_GetErrorCode(parser)),
*wxConvCurrent);
wxLogError(_("XML parsing error: '%s' at line %d"),
error.c_str(),
XML_GetCurrentLineNumber(parser));
ok = false;
break;
}
} while (!done);
if (ok)
{
if (!ctx.version.empty())
SetVersion(ctx.version);
if (!ctx.encoding.empty())
SetFileEncoding(ctx.encoding);
SetRoot(ctx.root);
}
else
{
delete ctx.root;
}
XML_ParserFree(parser);
#if !wxUSE_UNICODE
if ( ctx.conv )
delete ctx.conv;
#endif
return ok;
}
/* static */ bool IStateStore::LoadData(wxInputStream& input, void* dest, size_t size)
{
input.Read(dest, size);
return CheckLastRead(input, size);
}
// load the mxf file format
bool wxMXFHandler::LoadFile(wxImage *image, wxInputStream& stream, bool verbose, int index)
{
opj_dparameters_t parameters; /* decompression parameters */
opj_event_mgr_t event_mgr; /* event manager */
opj_image_t *opjimage = NULL;
unsigned char *src = NULL;
unsigned char *ptr;
int file_length, j2k_point, j2k_len;
opj_codestream_info_t cstr_info; /* Codestream information structure */
// destroy the image
image->Destroy();
/* handle to a decompressor */
opj_dinfo_t* dinfo = NULL;
opj_cio_t *cio = NULL;
/* configure the event callbacks (not required) */
memset(&event_mgr, 0, sizeof(opj_event_mgr_t));
event_mgr.error_handler = mxf_error_callback;
event_mgr.warning_handler = mxf_warning_callback;
event_mgr.info_handler = mxf_info_callback;
/* set decoding parameters to default values */
opj_set_default_decoder_parameters(¶meters);
/* prepare parameters */
strncpy(parameters.infile, "", sizeof(parameters.infile)-1);
strncpy(parameters.outfile, "", sizeof(parameters.outfile)-1);
parameters.decod_format = J2K_CFMT;
parameters.cod_format = BMP_DFMT;
if (m_reducefactor)
parameters.cp_reduce = m_reducefactor;
if (m_qualitylayers)
parameters.cp_layer = m_qualitylayers;
/*if (n_components)
parameters. = n_components;*/
/* JPWL only */
#ifdef USE_JPWL
parameters.jpwl_exp_comps = m_expcomps;
parameters.jpwl_max_tiles = m_maxtiles;
parameters.jpwl_correct = m_enablejpwl;
#endif /* USE_JPWL */
/* get a decoder handle */
dinfo = opj_create_decompress(CODEC_J2K);
/* find length of the stream */
stream.SeekI(0, wxFromEnd);
file_length = (int) stream.TellI();
/* search for the m_framenum codestream position and length */
//jp2c_point = searchjp2c(stream, file_length, m_framenum);
//jp2c_len = searchjp2c(stream, file_length, m_framenum);
j2k_point = 0;
j2k_len = 10;
// malloc memory source
src = (unsigned char *) malloc(j2k_len);
// copy the jp2c
stream.SeekI(j2k_point, wxFromStart);
stream.Read(src, j2k_len);
/* catch events using our callbacks and give a local context */
opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);
/* setup the decoder decoding parameters using user parameters */
opj_setup_decoder(dinfo, ¶meters);
/* open a byte stream */
cio = opj_cio_open((opj_common_ptr)dinfo, src, j2k_len);
/* decode the stream and fill the image structure */
opjimage = opj_decode_with_info(dinfo, cio, &cstr_info);
if (!opjimage) {
wxMutexGuiEnter();
wxLogError(wxT("MXF: failed to decode image!"));
wxMutexGuiLeave();
opj_destroy_decompress(dinfo);
opj_cio_close(cio);
free(src);
return false;
}
/* close the byte stream */
opj_cio_close(cio);
/* common rendering method */
#include "imagjpeg2000.cpp"
wxMutexGuiEnter();
wxLogMessage(wxT("MXF: image loaded."));
wxMutexGuiLeave();
/* close openjpeg structs */
opj_destroy_decompress(dinfo);
opj_image_destroy(opjimage);
free(src);
if (!image->Ok())
return false;
else
return true;
}
size_t OnSysRead(void *buffer, size_t bufsize)
{ wxASSERT(m_pStream); size_t ret = m_pStream->Read(buffer, bufsize).LastRead(); Synch(); return ret; }
bool wxAnimation::Load(wxInputStream &stream, wxAnimationType type)
{
UnRef();
char anim_type[12];
switch (type)
{
case wxANIMATION_TYPE_GIF:
strcpy(anim_type, "gif");
break;
case wxANIMATION_TYPE_ANI:
strcpy(anim_type, "ani");
break;
default:
anim_type[0] = '\0';
break;
}
// create a GdkPixbufLoader
GError *error = NULL;
GdkPixbufLoader *loader;
if (type != wxANIMATION_TYPE_INVALID && type != wxANIMATION_TYPE_ANY)
loader = gdk_pixbuf_loader_new_with_type(anim_type, &error);
else
loader = gdk_pixbuf_loader_new();
if (!loader)
{
wxLogDebug(wxT("Could not create the loader for '%s' animation type"), anim_type);
return false;
}
// connect to loader signals
g_signal_connect(loader, "area-updated", G_CALLBACK(gdk_pixbuf_area_updated), this);
guchar buf[2048];
while (stream.IsOk())
{
// read a chunk of data
stream.Read(buf, sizeof(buf));
// fetch all data into the loader
if (!gdk_pixbuf_loader_write(loader, buf, stream.LastRead(), &error))
{
gdk_pixbuf_loader_close(loader, &error);
wxLogDebug(wxT("Could not write to the loader"));
return false;
}
}
// load complete
if (!gdk_pixbuf_loader_close(loader, &error))
{
wxLogDebug(wxT("Could not close the loader"));
return false;
}
// wait until we get the last area_updated signal
return true;
}
