diff options
Diffstat (limited to 'indra/llimagej2coj/llimagej2coj.cpp')
| -rw-r--r-- | indra/llimagej2coj/llimagej2coj.cpp | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/indra/llimagej2coj/llimagej2coj.cpp b/indra/llimagej2coj/llimagej2coj.cpp index 488c07e1c9..7cfadb889d 100644 --- a/indra/llimagej2coj/llimagej2coj.cpp +++ b/indra/llimagej2coj/llimagej2coj.cpp @@ -919,32 +919,3 @@ bool LLImageJ2COJ::getMetadata(LLImageJ2C &base) base.setSize(width, height, components); return true; } - - -// OpenJPEG-tuned byte estimator. Conservative pyramid walk that accounts for -// OJ's whole-code-block decode behavior (even with strict mode off). Larger -// images get a per-resolution multiplier so the byte range lands inside the -// last needed code-block boundary. -S32 LLImageJ2COJ::estimateDataSize(S32 w, S32 h, S32 comp, S32 discard_level, F32 rate) const -{ - constexpr S32 precision = 8; - constexpr S32 max_components = 4; - S32 width = (w > 0) ? w : 2048; - S32 height = (h > 0) ? h : 2048; - S32 max_dimension = llmax(width, height); - S32 block_area = MAX_BLOCK_SIZE * MAX_BLOCK_SIZE; - S32 max_layers = (S32)llmax(llround(log2f((float)max_dimension) - log2f((float)MAX_BLOCK_SIZE)), 4); - block_area *= llmax(max_layers, 1); - S32 totalbytes = (S32)(MIN_LAYER_SIZE * max_components * precision); - S32 block_layers = 0; - while (block_layers <= max_layers) - { - if (block_layers <= (5 - discard_level)) - totalbytes += (S32)(block_area * max_components * precision * rate); - block_layers++; - block_area *= 4; - } - totalbytes /= 8; - totalbytes += LLImageJ2C::calcHeaderSizeJ2C(); - return totalbytes; -} |
