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-rw-r--r--indra/llkdu/llblockencoder.cpp340
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diff --git a/indra/llkdu/llblockencoder.cpp b/indra/llkdu/llblockencoder.cpp
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- /**
- * @file llblockencoder.cpp
- * @brief Image block compression
- *
- * $LicenseInfo:firstyear=2010&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License only.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
- * $/LicenseInfo$
- */
-
-#include "linden_common.h"
-
-#include "llblockencoder.h"
-
-// KDU core header files
-#include "kdu_elementary.h"
-#include "kdu_messaging.h"
-#include "kdu_params.h"
-#include "kdu_compressed.h"
-#include "kdu_sample_processing.h"
-
-#include "llkdumem.h"
-
-#include "llblockdata.h"
-#include "llerror.h"
-
-LLBlockEncoder::LLBlockEncoder()
-{
- mBPP = 0.f;
-}
-
-U8 *LLBlockEncoder::encode(const LLBlockData &block_data, U32 &output_size) const
-{
- switch (block_data.getType())
- {
- case LLBlockData::BLOCK_TYPE_U32:
- {
- LLBlockDataU32 &bd_u32 = (LLBlockDataU32 &)block_data;
- return encodeU32(bd_u32, output_size);
- }
- case LLBlockData::BLOCK_TYPE_F32:
- {
- LLBlockDataF32 &bd_f32 = (LLBlockDataF32 &)block_data;
- return encodeF32(bd_f32, output_size);
- }
- default:
- llerrs << "Unsupported block type!" << llendl;
- output_size = 0;
- return NULL;
- }
-}
-
-U8 *LLBlockEncoder::encodeU32(const LLBlockDataU32 &block_data, U32 &output_size) const
-{
- // OK, for now, just use the standard KDU encoder, with a single channel
- // integer channel.
-
- // Collect simple arguments.
- bool allow_rate_prediction, allow_shorts, mem, quiet, no_weights;
-
- allow_rate_prediction = true;
- allow_shorts = false;
- no_weights = false;
- bool use_absolute = false;
- mem = false;
- quiet = false;
-
- // Set codestream options
- siz_params siz;
- S16 precision = block_data.getPrecision();
-
- siz.set(Sdims,0,0,(U16)block_data.getHeight());
- siz.set(Sdims,0,1,(U16)block_data.getWidth());
- siz.set(Ssigned,0,0,false);
- siz.set(Scomponents,0,0,1);
- siz.set(Sprecision,0,0, precision);
-
- // Construct the `kdu_codestream' object and parse all remaining arguments.
- output_size = block_data.getSize();
- if (output_size < 1000)
- {
- output_size = 1000;
- }
-
- U8 *output_buffer = new U8[output_size];
-
- LLKDUMemTarget output(output_buffer, output_size, block_data.getSize());
-
- kdu_codestream codestream;
- codestream.create(&siz,&output);
-
- codestream.access_siz()->parse_string("Clayers=1");
- codestream.access_siz()->finalize_all();
-
- kdu_tile tile = codestream.open_tile(kdu_coords(0,0));
-
- // Open tile-components and create processing engines and resources
- kdu_dims dims;
- kdu_sample_allocator allocator;
- kdu_tile_comp tile_comp;
- kdu_line_buf line;
- kdu_push_ifc engine;
-
- tile_comp = tile.access_component(0);
- kdu_resolution res = tile_comp.access_resolution(); // Get top resolution
-
- res.get_dims(dims);
-
- line.pre_create(&allocator,dims.size.x, use_absolute, allow_shorts);
-
- if (res.which() == 0) // No DWT levels (should not occur in this example)
- {
- engine = kdu_encoder(res.access_subband(LL_BAND),&allocator, use_absolute);
- }
- else
- {
- engine = kdu_analysis(res,&allocator, use_absolute);
- }
-
- allocator.finalize(); // Actually creates buffering resources
- line.create(); // Grabs resources from the allocator.
-
- // Now walk through the lines of the buffer, pushing them into the
- // relevant tile-component processing engines.
-
- U32 *source_u32 = NULL;
- F32 scale_inv = 1.f / (1 << precision);
-
- S32 y;
- for (y = 0; y < dims.size.y; y++)
- {
- source_u32 = (U32*)(block_data.getData() + y * block_data.getRowStride());
- kdu_sample32 *dest = line.get_buf32();
- for (S32 n=dims.size.x; n > 0; n--, dest++, source_u32++)
- {
- // Just pack it in, for now.
- dest->fval = (F32)(*source_u32) * scale_inv - 0.5f;// - 0.5f;
- }
- engine.push(line, true);
- }
-
- // Cleanup
- engine.destroy(); // engines are interfaces; no default destructors
-
- // Produce the final compressed output.
- kdu_long layer_bytes[1] = {0};
-
- layer_bytes[0] = (kdu_long) (mBPP*block_data.getWidth()*block_data.getHeight());
- // Here we are not requesting specific sizes for any of the 12
- // quality layers. As explained in the description of
- // "kdu_codestream::flush" (see "kdu_compressed.h"), the rate allocator
- // will then assign the layers in such a way as to achieve roughly
- // two quality layers per octave change in bit-rate, with the final
- // layer reaching true lossless quality.
-
- codestream.flush(layer_bytes,1);
- // You can see how many bytes were assigned
- // to each quality layer by looking at the entries of `layer_bytes' here.
- // The flush function can do a lot of interesting things which you may
- // want to spend some time looking into. In addition to targeting
- // specific bit-rates for each quality layer, it can be configured to
- // use rate-distortion slope thresholds of your choosing and to return
- // the thresholds which it finds to be best for any particular set of
- // target layer sizes. This opens the door to feedback-oriented rate
- // control for video. You should also look into the
- // "kdu_codestream::set_max_bytes" and
- // "kdu_codestream::set_min_slope_threshold" functions which can be
- // used to significantly speed up compression.
- codestream.destroy(); // All done: simple as that.
-
- // Now that we're done encoding, create the new data buffer for the compressed
- // image and stick it there.
-
- U8 *output_data = new U8[output_size];
-
- memcpy(output_data, output_buffer, output_size);
-
- output.close(); // Not really necessary here.
-
- return output_data;
-}
-
-U8 *LLBlockEncoder::encodeF32(const LLBlockDataF32 &block_data, U32 &output_size) const
-{
- // OK, for now, just use the standard KDU encoder, with a single channel
- // integer channel.
-
- // Collect simple arguments.
- bool allow_rate_prediction, allow_shorts, mem, quiet, no_weights;
-
- allow_rate_prediction = true;
- allow_shorts = false;
- no_weights = false;
- bool use_absolute = false;
- mem = false;
- quiet = false;
-
- F32 min, max, range, range_inv, offset;
- min = block_data.getMin();
- max = block_data.getMax();
- range = max - min;
- range_inv = 1.f / range;
- offset = 0.5f*(max + min);
-
- // Set codestream options
- siz_params siz;
- S16 precision = block_data.getPrecision(); // Assume precision is always 32 bits for floating point.
-
- siz.set(Sdims,0,0,(U16)block_data.getHeight());
- siz.set(Sdims,0,1,(U16)block_data.getWidth());
- siz.set(Ssigned,0,0,false);
- siz.set(Scomponents,0,0,1);
- siz.set(Sprecision,0,0, precision);
-
- // Construct the `kdu_codestream' object and parse all remaining arguments.
- output_size = block_data.getSize();
- if (output_size < 1000)
- {
- output_size = 1000;
- }
-
- U8 *output_buffer = new U8[output_size*2];
-
- LLKDUMemTarget output(output_buffer, output_size, block_data.getSize());
-
- kdu_codestream codestream;
- codestream.create(&siz,&output);
-
- codestream.access_siz()->parse_string("Clayers=1");
- codestream.access_siz()->finalize_all();
-
- kdu_tile tile = codestream.open_tile(kdu_coords(0,0));
-
- // Open tile-components and create processing engines and resources
- kdu_dims dims;
- kdu_sample_allocator allocator;
- kdu_tile_comp tile_comp;
- kdu_line_buf line;
- kdu_push_ifc engine;
-
- tile_comp = tile.access_component(0);
- kdu_resolution res = tile_comp.access_resolution(); // Get top resolution
-
- res.get_dims(dims);
-
- line.pre_create(&allocator,dims.size.x, use_absolute, allow_shorts);
-
- if (res.which() == 0) // No DWT levels (should not occur in this example)
- {
- engine = kdu_encoder(res.access_subband(LL_BAND),&allocator, use_absolute);
- }
- else
- {
- engine = kdu_analysis(res,&allocator, use_absolute);
- }
-
- allocator.finalize(); // Actually creates buffering resources
- line.create(); // Grabs resources from the allocator.
-
- // Now walk through the lines of the buffer, pushing them into the
- // relevant tile-component processing engines.
-
- F32 *source_f32 = NULL;
-
- S32 y;
- for (y = 0; y < dims.size.y; y++)
- {
- source_f32 = (F32*)(block_data.getData() + y * block_data.getRowStride());
- kdu_sample32 *dest = line.get_buf32();
- for (S32 n=dims.size.x; n > 0; n--, dest++, source_f32++)
- {
- dest->fval = ((*source_f32) - offset) * range_inv;
- }
- engine.push(line, true);
- }
-
- // Cleanup
- engine.destroy(); // engines are interfaces; no default destructors
-
- // Produce the final compressed output.
- kdu_long layer_bytes[1] = {0};
-
- layer_bytes[0] = (kdu_long) (mBPP*block_data.getWidth()*block_data.getHeight());
- // Here we are not requesting specific sizes for any of the 12
- // quality layers. As explained in the description of
- // "kdu_codestream::flush" (see "kdu_compressed.h"), the rate allocator
- // will then assign the layers in such a way as to achieve roughly
- // two quality layers per octave change in bit-rate, with the final
- // layer reaching true lossless quality.
-
- codestream.flush(layer_bytes,1);
- // You can see how many bytes were assigned
- // to each quality layer by looking at the entries of `layer_bytes' here.
- // The flush function can do a lot of interesting things which you may
- // want to spend some time looking into. In addition to targeting
- // specific bit-rates for each quality layer, it can be configured to
- // use rate-distortion slope thresholds of your choosing and to return
- // the thresholds which it finds to be best for any particular set of
- // target layer sizes. This opens the door to feedback-oriented rate
- // control for video. You should also look into the
- // "kdu_codestream::set_max_bytes" and
- // "kdu_codestream::set_min_slope_threshold" functions which can be
- // used to significantly speed up compression.
- codestream.destroy(); // All done: simple as that.
-
- // Now that we're done encoding, create the new data buffer for the compressed
- // image and stick it there.
-
- U8 *output_data = new U8[output_size];
-
- memcpy(output_data, output_buffer, output_size);
-
- output.close(); // Not really necessary here.
-
- delete[] output_buffer;
-
- return output_data;
-}
-
-
-void LLBlockEncoder::setBPP(const F32 bpp)
-{
- mBPP = bpp;
-}
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