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/**
* @file llimagej2c.cpp
*
* Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#include "linden_common.h"
#ifndef LL_USE_KDU
#define LL_USE_KDU 1
#endif // LL_USE_KDU
#include "llimagej2c.h"
#include "llmemory.h"
#if LL_USE_KDU
#include "llimagej2ckdu.h"
#endif
#include "llimagej2coj.h"
LLImageJ2C::LLImageJ2C() : LLImageFormatted(IMG_CODEC_J2C),
mMaxBytes(0),
mRawDiscardLevel(-1),
mRate(0.0f)
{
#if LL_USE_KDU
mImpl = new LLImageJ2CKDU();
#else
mImpl = new LLImageJ2COJ();
#endif
}
// virtual
LLImageJ2C::~LLImageJ2C()
{
delete mImpl;
}
// virtual
S8 LLImageJ2C::getRawDiscardLevel()
{
return mRawDiscardLevel;
}
BOOL LLImageJ2C::updateData()
{
resetLastError();
// Check to make sure that this instance has been initialized with data
if (!getData() || (getDataSize() < 16))
{
setLastError("LLImageJ2C uninitialized");
return FALSE;
}
if (!mImpl->getMetadata(*this))
{
return FALSE;
}
// SJB: override discard based on mMaxBytes elsewhere
S32 max_bytes = getDataSize(); // mMaxBytes ? mMaxBytes : getDataSize();
S32 discard = calcDiscardLevelBytes(max_bytes);
setDiscardLevel(discard);
return TRUE;
}
BOOL LLImageJ2C::decode(LLImageRaw *raw_imagep, F32 decode_time)
{
return decode(raw_imagep, decode_time, 0, 4);
}
BOOL LLImageJ2C::decode(LLImageRaw *raw_imagep, F32 decode_time, S32 first_channel, S32 max_channel_count )
{
LLMemType mt1((LLMemType::EMemType)mMemType);
resetLastError();
// Check to make sure that this instance has been initialized with data
if (!getData() || (getDataSize() < 16))
{
setLastError("LLImageJ2C uninitialized");
return FALSE;
}
// Update the raw discard level
updateRawDiscardLevel();
return mImpl->decodeImpl(*this, *raw_imagep, decode_time, 0, 4);
}
BOOL LLImageJ2C::encode(const LLImageRaw *raw_imagep, F32 encode_time)
{
return encode(raw_imagep, NULL, encode_time);
}
BOOL LLImageJ2C::encode(const LLImageRaw *raw_imagep, const char* comment_text, F32 encode_time)
{
LLMemType mt1((LLMemType::EMemType)mMemType);
return mImpl->encodeImpl(*this, *raw_imagep, comment_text, encode_time);
}
//static
S32 LLImageJ2C::calcHeaderSizeJ2C()
{
return 600; //2048; // ??? hack... just needs to be >= actual header size...
}
//static
S32 LLImageJ2C::calcDataSizeJ2C(S32 w, S32 h, S32 comp, S32 discard_level, F32 rate)
{
if (rate <= 0.f) rate = .125f;
while (discard_level > 0)
{
if (w < 1 || h < 1)
break;
w >>= 1;
h >>= 1;
discard_level--;
}
S32 bytes = (S32)((F32)(w*h*comp)*rate);
bytes = llmax(bytes, calcHeaderSizeJ2C());
return bytes;
}
S32 LLImageJ2C::calcHeaderSize()
{
return calcHeaderSizeJ2C();
}
S32 LLImageJ2C::calcDataSize(S32 discard_level)
{
return calcDataSizeJ2C(getWidth(), getHeight(), getComponents(), discard_level, mRate);
}
S32 LLImageJ2C::calcDiscardLevelBytes(S32 bytes)
{
llassert(bytes >= 0);
S32 discard_level = 0;
if (bytes == 0)
{
return MAX_DISCARD_LEVEL;
}
while (1)
{
S32 bytes_needed = calcDataSize(discard_level); // virtual
if (bytes >= bytes_needed - (bytes_needed>>2)) // For J2c, up the res at 75% of the optimal number of bytes
{
break;
}
discard_level++;
if (discard_level >= MAX_DISCARD_LEVEL)
{
break;
}
}
return discard_level;
}
void LLImageJ2C::setRate(F32 rate)
{
mRate = rate;
}
void LLImageJ2C::setMaxBytes(S32 max_bytes)
{
mMaxBytes = max_bytes;
}
// NOT USED
// void LLImageJ2C::setReversible(const BOOL reversible)
// {
// mReversible = reversible;
// }
BOOL LLImageJ2C::loadAndValidate(const LLString &filename)
{
resetLastError();
S32 file_size = 0;
apr_file_t* apr_file = ll_apr_file_open(filename, LL_APR_RB, &file_size);
if (!apr_file)
{
setLastError("Unable to open file for reading", filename);
return FALSE;
}
if (file_size == 0)
{
setLastError("File is empty",filename);
apr_file_close(apr_file);
return FALSE;
}
U8 *data = new U8[file_size];
apr_size_t bytes_read = file_size;
apr_status_t s = apr_file_read(apr_file, data, &bytes_read); // modifies bytes_read
if (s != APR_SUCCESS || bytes_read != file_size)
{
delete[] data;
setLastError("Unable to read entire file");
return FALSE;
}
apr_file_close(apr_file);
return validate(data, file_size);
}
BOOL LLImageJ2C::validate(U8 *data, U32 file_size)
{
LLMemType mt1((LLMemType::EMemType)mMemType);
// Taken from setData()
BOOL res = LLImageFormatted::setData(data, file_size);
if ( !res )
{
return FALSE;
}
// Check to make sure that this instance has been initialized with data
if (!getData() || (0 == getDataSize()))
{
setLastError("LLImageJ2C uninitialized");
return FALSE;
}
return mImpl->getMetadata(*this);
}
void LLImageJ2C::setDecodingDone(BOOL complete)
{
mDecoding = FALSE;
mDecoded = complete;
}
void LLImageJ2C::updateRawDiscardLevel()
{
mRawDiscardLevel = mMaxBytes ? calcDiscardLevelBytes(mMaxBytes) : mDiscardLevel;
}
LLImageJ2CImpl::~LLImageJ2CImpl()
{
}
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