diff options
Diffstat (limited to 'indra/llimage/llimagej2c.cpp')
| -rw-r--r-- | indra/llimage/llimagej2c.cpp | 85 |
1 files changed, 41 insertions, 44 deletions
diff --git a/indra/llimage/llimagej2c.cpp b/indra/llimage/llimagej2c.cpp index 8241746a74..452aad25cb 100644 --- a/indra/llimage/llimagej2c.cpp +++ b/indra/llimage/llimagej2c.cpp @@ -56,7 +56,7 @@ std::string LLImageJ2C::getEngineInfo() LLImageJ2C::LLImageJ2C() : LLImageFormatted(IMG_CODEC_J2C), mMaxBytes(0), mRawDiscardLevel(-1), - mRate(0.0f), + mRate(DEFAULT_COMPRESSION_RATE), mReversible(FALSE), mAreaUsedForDataSizeCalcs(0) { @@ -142,6 +142,7 @@ BOOL LLImageJ2C::updateData() BOOL LLImageJ2C::initDecode(LLImageRaw &raw_image, int discard_level, int* region) { + setDiscardLevel(discard_level != -1 ? discard_level : 0); return mImpl->initDecode(*this,raw_image,discard_level,region); } @@ -261,19 +262,34 @@ S32 LLImageJ2C::calcHeaderSizeJ2C() //static S32 LLImageJ2C::calcDataSizeJ2C(S32 w, S32 h, S32 comp, S32 discard_level, F32 rate) { - // Note: this only provides an *estimate* of the size in bytes of an image level - // *TODO: find a way to read the true size (when available) and convey the fact - // that the result is an estimate in the other cases - if (rate <= 0.f) rate = .125f; - while (discard_level > 0) + // Note: This provides an estimation for the first to last quality layer of a given discard level + // This is however an efficient approximation, as the true discard level boundary would be + // in general too big for fast fetching. + // For details about the equation used here, see https://wiki.lindenlab.com/wiki/THX1138_KDU_Improvements#Byte_Range_Study + + // Estimate the number of layers. This is consistent with what's done for j2c encoding in LLImageJ2CKDU::encodeImpl(). + S32 nb_layers = 1; + S32 surface = w*h; + S32 s = 64*64; + while (surface > s) { - if (w < 1 || h < 1) - break; - w >>= 1; - h >>= 1; - discard_level--; + nb_layers++; + s *= 4; } - S32 bytes = (S32)((F32)(w*h*comp)*rate); + F32 layer_factor = 3.0f * (7 - llclamp(nb_layers,1,6)); + + // Compute w/pow(2,discard_level) and h/pow(2,discard_level) + w >>= discard_level; + h >>= discard_level; + w = llmax(w, 1); + h = llmax(h, 1); + + // Temporary: compute both new and old range and pick one according to the settings TextureNewByteRange + // *TODO: Take the old code out once we have enough tests done + S32 bytes; + S32 new_bytes = (S32) (sqrt((F32)(w*h))*(F32)(comp)*rate*1000.f/layer_factor); + S32 old_bytes = (S32)((F32)(w*h*comp)*rate); + bytes = (LLImage::useNewByteRange() && (new_bytes < old_bytes) ? new_bytes : old_bytes); bytes = llmax(bytes, calcHeaderSizeJ2C()); return bytes; } @@ -283,15 +299,12 @@ S32 LLImageJ2C::calcHeaderSize() return calcHeaderSizeJ2C(); } - -// calcDataSize() returns how many bytes to read -// to load discard_level (including header and higher discard levels) +// calcDataSize() returns how many bytes to read to load discard_level (including header) S32 LLImageJ2C::calcDataSize(S32 discard_level) { discard_level = llclamp(discard_level, 0, MAX_DISCARD_LEVEL); - if ( mAreaUsedForDataSizeCalcs != (getHeight() * getWidth()) - || mDataSizes[0] == 0) + || (mDataSizes[0] == 0)) { mAreaUsedForDataSizeCalcs = getHeight() * getWidth(); @@ -301,25 +314,6 @@ S32 LLImageJ2C::calcDataSize(S32 discard_level) mDataSizes[level] = calcDataSizeJ2C(getWidth(), getHeight(), getComponents(), level, mRate); level--; } - - /* This is technically a more correct way to calculate the size required - for each discard level, since they should include the size needed for - lower levels. Unfortunately, this doesn't work well and will lead to - download stalls. The true correct way is to parse the header. This will - all go away with http textures at some point. - - // Calculate the size for each discard level. Lower levels (higher quality) - // contain the cumulative size of higher levels - S32 total_size = calcHeaderSizeJ2C(); - - S32 level = MAX_DISCARD_LEVEL; // Start at the highest discard - while ( level >= 0 ) - { // Add in this discard level and all before it - total_size += calcDataSizeJ2C(getWidth(), getHeight(), getComponents(), level, mRate); - mDataSizes[level] = total_size; - level--; - } - */ } return mDataSizes[discard_level]; } @@ -334,8 +328,9 @@ S32 LLImageJ2C::calcDiscardLevelBytes(S32 bytes) } 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 + S32 bytes_needed = calcDataSize(discard_level); + // Use TextureReverseByteRange percent (see settings.xml) of the optimal size to qualify as correct rendering for the given discard level + if (bytes >= (bytes_needed*LLImage::getReverseByteRangePercent()/100)) { break; } @@ -348,11 +343,6 @@ S32 LLImageJ2C::calcDiscardLevelBytes(S32 bytes) return discard_level; } -void LLImageJ2C::setRate(F32 rate) -{ - mRate = rate; -} - void LLImageJ2C::setMaxBytes(S32 max_bytes) { mMaxBytes = max_bytes; @@ -474,6 +464,7 @@ LLImageCompressionTester::LLImageCompressionTester() : LLMetricPerformanceTester addMetric("Perf Compression (kB/s)"); mRunBytesInDecompression = 0; + mRunBytesOutDecompression = 0; mRunBytesInCompression = 0; mTotalBytesInDecompression = 0; @@ -483,6 +474,7 @@ LLImageCompressionTester::LLImageCompressionTester() : LLMetricPerformanceTester mTotalTimeDecompression = 0.0f; mTotalTimeCompression = 0.0f; + mRunTimeDecompression = 0.0f; } LLImageCompressionTester::~LLImageCompressionTester() @@ -565,12 +557,17 @@ void LLImageCompressionTester::updateDecompressionStats(const S32 bytesIn, const mTotalBytesInDecompression += bytesIn; mRunBytesInDecompression += bytesIn; mTotalBytesOutDecompression += bytesOut; - if (mRunBytesInDecompression > (1000000)) + mRunBytesOutDecompression += bytesOut; + //if (mRunBytesInDecompression > (1000000)) + if (mRunBytesOutDecompression > (10000000)) + //if ((mTotalTimeDecompression - mRunTimeDecompression) >= (5.0f)) { // Output everything outputTestResults(); // Reset the decompression data of the run mRunBytesInDecompression = 0; + mRunBytesOutDecompression = 0; + mRunTimeDecompression = mTotalTimeDecompression; } } |