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Trying to make the decoder work

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This commit is contained in:
Surma
2021-05-14 13:13:41 +01:00
parent bb036df1fc
commit d3c1877e76
3 changed files with 87 additions and 2 deletions
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5
codecs/basis/Makefile
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@@ -3,7 +3,7 @@ CODEC_DIR := node_modules/basis
BUILD_DIR := build
ENVIRONMENT = worker
OUT_JS := enc/basis_enc.js # enc/basis_node_enc.js
OUT_JS := enc/basis_enc.js dec/basis_dec.js
OUT_WASM := $(OUT_JS:.js=.wasm)
override CXXFLAGS += -O3
@@ -43,13 +43,14 @@ all: $(CODEC_DIR) $(OUT_JS)
# Define dependencies for all variations of build artifacts.
$(filter enc/%,$(OUT_JS)): enc/basis_enc.cpp
# $(filter dec/%,$(OUT_JS)): dec/mozjpeg_dec.cpp
$(filter dec/%,$(OUT_JS)): dec/basis_dec.cpp
# enc/mozjpeg_node_enc.js dec/mozjpeg_node_dec.js: ENVIRONMENT = node
%.js: $(CODEC_CPP_OBJECT_FILE_PATHS) $(CODEC_C_OBJECT_FILE_PATHS)
$(CXX) \
-I $(CODEC_DIR)/encoder \
-I $(CODEC_DIR)/transcoder \
${CXXFLAGS} \
${LDFLAGS} \
--closure 1 \

24
codecs/basis/asdf.html Normal file
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@@ -0,0 +1,24 @@
<!doctype html>
<input type="file" id="file">
<button id="go">Go</button>
<script type="module">
import factory from "./enc/basis_enc.js";
const {file, go} = document.all;
async function main() {
const instance = await factory();
const bitmap = await createImageBitmap(file.files[0]);
const canvas = new OffscreenCanvas(bitmap.width, bitmap.height);
const ctx = canvas.getContext("2d");
ctx.drawImage(bitmap, 0, 0);
const imgData = ctx.getImageData(0, 0, canvas.width, canvas.height);
const result = instance.encode(imgData.data, imgData.width, imgData.height);
const blob = new File([result], "lol.basis");
const u = URL.createObjectURL(blob);
const a = document.createElement("a")
a.download = "lol.basis";
a.href = u;
a.click();
}
go.onclick = main;
</script>

60
codecs/basis/dec/basis_dec.cpp Normal file
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@@ -0,0 +1,60 @@
#include <emscripten/bind.h>
#include <emscripten/val.h>
#include <inttypes.h>
#include "basisu_global_selector_palette.h"
#include "basisu_transcoder.h"
using namespace emscripten;
using namespace basisu;
thread_local const val Uint8ClampedArray = val::global("Uint8ClampedArray");
thread_local const val ImageData = val::global("ImageData");
val decode(std::string data) {
basist::basisu_transcoder_init();
basist::etc1_global_selector_codebook sel_codebook = basist::etc1_global_selector_codebook(
basist::g_global_selector_cb_size, basist::g_global_selector_cb);
// basis_data data = basis_data(sel_codebook);
basist::basisu_transcoder transcoder = basist::basisu_transcoder(&sel_codebook);
const void* dataPtr = reinterpret_cast<const void*>(data.c_str());
auto dataSize = data.size();
basist::basisu_image_info info;
transcoder.get_image_info(dataPtr, dataSize, info, 0 /* image_index */);
auto buffer = std::vector<uint8_t>(info.m_width * info.m_height * 4);
auto ok = transcoder.transcode_image_level(dataPtr, dataSize,
/* image_index */ 0, /* level_index */ 0,
buffer.data(), buffer.size() / 4,
basist::transcoder_texture_format::cTFRGBA32);
if (!ok) {
return val(std::string("Could not decode"));
}
auto img_data_data = Uint8ClampedArray.new_(typed_memory_view(buffer.size(), buffer.data()));
auto imgData = ImageData.new_(img_data_data, info.m_width, info.m_height);
return imgData;
}
EMSCRIPTEN_BINDINGS(my_module) {
// value_object<MozJpegOptions>("MozJpegOptions")
// .field("quality", &MozJpegOptions::quality)
// .field("baseline", &MozJpegOptions::baseline)
// .field("arithmetic", &MozJpegOptions::arithmetic)
// .field("progressive", &MozJpegOptions::progressive)
// .field("optimize_coding", &MozJpegOptions::optimize_coding)
// .field("smoothing", &MozJpegOptions::smoothing)
// .field("color_space", &MozJpegOptions::color_space)
// .field("quant_table", &MozJpegOptions::quant_table)
// .field("trellis_multipass", &MozJpegOptions::trellis_multipass)
// .field("trellis_opt_zero", &MozJpegOptions::trellis_opt_zero)
// .field("trellis_opt_table", &MozJpegOptions::trellis_opt_table)
// .field("trellis_loops", &MozJpegOptions::trellis_loops)
// .field("chroma_subsample", &MozJpegOptions::chroma_subsample)
// .field("auto_subsample", &MozJpegOptions::auto_subsample)
// .field("separate_chroma_quality", &MozJpegOptions::separate_chroma_quality)
// .field("chroma_quality", &MozJpegOptions::chroma_quality);
function("decode", &decode);
}