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Diffstat (limited to 'indra/llimage/llimagej2c.cpp')
| -rw-r--r-- | indra/llimage/llimagej2c.cpp | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/indra/llimage/llimagej2c.cpp b/indra/llimage/llimagej2c.cpp index 512b370bae..8099a18045 100644 --- a/indra/llimage/llimagej2c.cpp +++ b/indra/llimage/llimagej2c.cpp @@ -265,32 +265,6 @@ S32 LLImageJ2C::calcHeaderSizeJ2C() return FIRST_PACKET_SIZE; // Hack. just needs to be >= actual header size... } -// Lean pyramid-walk byte estimator suited to packet-by-packet decoders (KDU). -// Starts at one max-block, walks resolutions by doubling area, sums each -// layer's compressed-bytes contribution. -// Reference: https://wiki.lindenlab.com/wiki/THX1138_KDU_Improvements#Byte_Range_Study -S32 LLImageJ2CImpl::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; - const S32 surface = width * height; - S32 nb_layers = 1; - S32 s = MAX_BLOCK_SIZE * MAX_BLOCK_SIZE; - S32 totalbytes = (S32)(s * max_components * precision * rate); - while (surface > s) - { - if (nb_layers <= (5 - discard_level)) - totalbytes += (S32)(s * max_components * precision * rate); - nb_layers++; - s *= 4; - } - totalbytes /= 8; - totalbytes += LLImageJ2C::calcHeaderSizeJ2C(); - return totalbytes; -} - //static S32 LLImageJ2C::calcDataSizeJ2C(S32 w, S32 h, S32 comp, S32 discard_level, F32 rate) { |