diff --git a/.gitignore b/.gitignore index 8017b3e..6f94d98 100644 --- a/.gitignore +++ b/.gitignore @@ -1,5 +1,6 @@ # Prerequisites -plugins +libjpeg +zlib build *._* *.d diff --git a/Makefile b/Makefile index 984537e..1b36a1b 100644 --- a/Makefile +++ b/Makefile @@ -9,6 +9,7 @@ PLUGINSDEP = $(OBJS) \ wvnc.o DEP = +WEB_BUILD_PATH = /home/mrsang/myws/antd-web-apps/apps/assets/scripts ifeq ($(UNAME_S),Darwin) DEP= -I/usr/local/opt/jpeg-turbo/include -L/usr/local/opt/jpeg-turbo/lib endif @@ -26,6 +27,12 @@ main: $(PLUGINSDEP) $(PLUGINS) #lib -ln -s $(PBUILDIRD)/libantd.$(EXT) . $(CC) $(PCFLAGS) $(PLUGINSDEP) $(PLUGINLIBS) -shared -o $(PBUILDIRD)/$(basename $@).$(EXT) +web: + emcc -o $(WEB_BUILD_PATH)/wvnc_asm.js -I wasm/libjpeg/ -I wasm/zlib wasm/decoder.c \ + wasm/libjpeg/.libs/libjpeg.a wasm/zlib/libz.a \ + -O3 -s ALLOW_MEMORY_GROWTH=1 -s WASM=1 -s NO_EXIT_RUNTIME=1 -s \ + 'EXTRA_EXPORTED_RUNTIME_METHODS=["cwrap"]' + clean: #libclean -rm -f *.o *.$(EXT) $(PBUILDIRD)/$(PLUGINS) diff --git a/wasm/decoder.c b/wasm/decoder.c new file mode 100644 index 0000000..db42a82 --- /dev/null +++ b/wasm/decoder.c @@ -0,0 +1,213 @@ +#include +#include +#include +#include +#include +#include +#include "emscripten.h" +/* +* This file is the decoder for the wvnc data +* received on the client side, it will be complied +* to web assembly to be used on the browser +*/ + +/*alloc a new frame buffer*/ +typedef struct{ + uint8_t r; + uint8_t g; + uint8_t b; +} raw_pixel_t; +EMSCRIPTEN_KEEPALIVE +uint8_t* create_buffer(int size) { + return malloc(size); +} +/*destroy buffer*/ +EMSCRIPTEN_KEEPALIVE +void destroy_buffer(uint8_t* p) { + free(p); +} +int decode_zlib(uint8_t* in,int size_in, uint8_t* out, int size_out) +{ + z_stream dstream; + dstream.zalloc = Z_NULL; + dstream.zfree = Z_NULL; + dstream.opaque = Z_NULL; + dstream.next_in = in; + dstream.avail_in = size_in; + dstream.avail_out = size_out; + dstream.next_out = out; + inflateInit(&dstream); + inflate(&dstream, Z_FINISH); + inflateEnd(&dstream); + return dstream.total_out; +} + + +int decode_jpeg(uint8_t* in,int size_in, uint8_t* out) +{ + struct jpeg_decompress_struct cinfo = {0}; + struct jpeg_error_mgr jerror = {0}; + cinfo.err = jpeg_std_error(&jerror); + jpeg_create_decompress(&cinfo); + jpeg_mem_src(&cinfo, in, size_in); + // check if the jpeg is valid + int rc = jpeg_read_header(&cinfo, TRUE); + if (rc != 1) { + printf("Cannot read JPEG header"); + return 0; + } + //cinfo.out_color_space = JCS_RGB; + //cinfo.dct_method = JDCT_ISLOW; + jpeg_start_decompress(&cinfo); + int width = cinfo.output_width; + int height = cinfo.output_height; + int osize = width*height*3; + int row_stride = width * 3; + //printf("width %d, height %d %d\n", width, height, cinfo.output_components); + uint8_t * tmp = (uint8_t*) malloc(osize); + uint8_t * line_buffer[1]; + int index; + while( cinfo.output_scanline < height ){ + line_buffer[0] = tmp +(cinfo.output_scanline) * row_stride; + jpeg_read_scanlines(&cinfo, line_buffer, 1); + } + jpeg_finish_decompress(&cinfo); + jpeg_destroy_decompress(&cinfo); + for(int j = 0; j < height; j++) + { + for(int i = 0; i < width; i++) + { + index = j*width*4 + i*4; + memcpy(out + index, tmp + j*width*3 + i*3, 3); + *(out + index + 3) = 255; + } + } + //copy + //memcpy(out, tmp, osize); + //free + free(tmp); + return osize; +} + + +int decode_raw(uint8_t* in,int size, int depth, uint8_t* out) +{ + if(depth != 24 && depth != 16) + { + printf("Depth % d is not supported\n", depth); + return 0; + } + int components = depth/8; + int npixels = size / components; + int outsize = npixels*4; + unsigned int value = 0; + uint8_t* tmp = (uint8_t*) malloc(outsize); + raw_pixel_t px; + for(int i = 0; i < npixels; i++) + { + value = 0; + for(int j=0; j < components; j++ ) + value = (in[i * components + j] << (j*8)) | value ; + // lookup for pixel + + switch (depth) + { + case 24: + px.r = value & 0xFF; + px.g = (value >> 8) & 0xFF; + px.b = (value >> 16) & 0xFF; + break; + case 16: + px.r = (value & 0x1F) * (255 / 31); + px.g = ((value >> 5) & 0x3F) * (255 / 63); + px.b = ((value >> 11) & 0x1F) * (255 / 31); + break; + default: + break; + } + tmp[i*4] = px.r; + tmp[i*4+1] = px.g; + tmp[i*4+2] = px.b; + tmp[i*4+3] = 255; + } + memcpy(out, tmp, outsize); + free(tmp); + return outsize; +} + +void update_buffer(uint8_t* fb, uint8_t* data, int x, int y, int w, int h, int bw) +{ + //printf("update buffer\n"); + //copy line by line + uint8_t *src_ptr, *dest_ptr; + for(int j = 0; j < h; j++) + { + src_ptr = data + (j*w*4); + dest_ptr = fb + ((j+y)*bw*4 + x*4); + memcpy(dest_ptr, src_ptr, w*4); + } +} + +EMSCRIPTEN_KEEPALIVE +uint8_t* decode(uint8_t* data, int data_size, int depth, int size_out) +{ + uint8_t flag = data[9]; + //printf("x %d y %d w %d h %d flag %d\n",x,y,w,h,flag); + uint8_t* encoded_data = data + 10; + uint8_t* decoded_data = NULL; + int ret = 0; + if(flag == 0x0 && depth == 32) + { + return encoded_data; + } + else + { + decoded_data = (uint8_t*) malloc(size_out); + switch (flag) + { + case 0x0: // raw 24 or 16 bits + ret = decode_raw(encoded_data,data_size,depth, decoded_data); + break; + case 0x1: // jpeg data + ret = decode_jpeg(encoded_data, data_size, decoded_data); + break; + case 0x2: // zlib data + ret = decode_zlib(encoded_data, data_size, decoded_data, size_out); + if(ret > 0 && depth != 32) + ret = decode_raw(decoded_data,ret,depth, decoded_data); + break; + case 0x3: // jpeg and zlib data + ret = decode_zlib(encoded_data, data_size, decoded_data, size_out); + if(ret > 0) + ret = decode_jpeg(decoded_data, ret, decoded_data); + break; + default: + if(decoded_data) free(decoded_data); + return NULL; + } + // write decoded data to buffer + return decoded_data; + } +} + +/*decode the data format*/ +EMSCRIPTEN_KEEPALIVE +int update(uint8_t* fb, uint8_t* data, int data_size, int bw, int bh, int depth) +{ + int x,y,w,h; + uint8_t flag; + // data [0] is commad + x = data[1] | (data[2] << 8); + y = data[3] | (data[4] << 8); + w = data[5] | (data[6] << 8); + h = data[7] | (data[8] << 8); + flag = data[9]; + uint8_t* decoded_data = decode(data, data_size, depth, w*h*4); + if(decoded_data) + update_buffer(fb,decoded_data,x,y,w,h,bw); + if(flag != 0x0 || depth != 32) free(decoded_data); + else + printf("Cannot decode data\n"); + return 1; + +} diff --git a/wasm/dep.sh b/wasm/dep.sh new file mode 100755 index 0000000..39a8ccb --- /dev/null +++ b/wasm/dep.sh @@ -0,0 +1,34 @@ +#! /bin/bash +# Make sure the emsdk is installed and worked +echo "Preparing libjpeg..." +if [ -d "libjpeg" ]; then + rm -r libjpeg +fi +if [ -d "zlib" ]; then + rm -r zlib +fi +wget http://www.ijg.org/files/jpegsrc.v9c.tar.gz +mkdir libjpeg +tar xvzf jpegsrc.v9c.tar.gz -C ./libjpeg --strip-components=1 +rm jpegsrc.v9c.tar.gz +cd libjpeg +emconfigure ./configure +emmake make +## Using libjpeg-turbo +#git clone https://github.com/libjpeg-turbo/libjpeg-turbo +#mv libjpeg-turbo libjpeg +#cd libjpeg +#mkdir build +#cd build +#emcmake cmake ../ +#emmake make +cd ../ +echo "Preparinf Zlib..." +wget https://zlib.net/zlib-1.2.11.tar.gz +mkdir zlib +tar xvzf zlib-1.2.11.tar.gz -C ./zlib --strip-components=1 +rm zlib-1.2.11.tar.gz +cd zlib +emconfigure ./configure +# TODO modify make file using sed if macos +emmake make \ No newline at end of file diff --git a/wasm/wvnc_asm.js b/wasm/wvnc_asm.js new file mode 100644 index 0000000..d6111bf --- /dev/null +++ b/wasm/wvnc_asm.js @@ -0,0 +1,4 @@ +var Module=typeof Module!=="undefined"?Module:{};var moduleOverrides={};var key;for(key in Module){if(Module.hasOwnProperty(key)){moduleOverrides[key]=Module[key]}}Module["arguments"]=[];Module["thisProgram"]="./this.program";Module["quit"]=(function(status,toThrow){throw toThrow});Module["preRun"]=[];Module["postRun"]=[];var ENVIRONMENT_IS_WEB=false;var ENVIRONMENT_IS_WORKER=false;var ENVIRONMENT_IS_NODE=false;var ENVIRONMENT_IS_SHELL=false;ENVIRONMENT_IS_WEB=typeof window==="object";ENVIRONMENT_IS_WORKER=typeof 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asm=Module["asm"](Module.asmGlobalArg,Module.asmLibraryArg,buffer);Module["asm"]=asm;var ___emscripten_environ_constructor=Module["___emscripten_environ_constructor"]=(function(){return Module["asm"]["___emscripten_environ_constructor"].apply(null,arguments)});var ___errno_location=Module["___errno_location"]=(function(){return Module["asm"]["___errno_location"].apply(null,arguments)});var _create_buffer=Module["_create_buffer"]=(function(){return Module["asm"]["_create_buffer"].apply(null,arguments)});var _destroy_buffer=Module["_destroy_buffer"]=(function(){return Module["asm"]["_destroy_buffer"].apply(null,arguments)});var _free=Module["_free"]=(function(){return Module["asm"]["_free"].apply(null,arguments)});var _malloc=Module["_malloc"]=(function(){return Module["asm"]["_malloc"].apply(null,arguments)});var _update=Module["_update"]=(function(){return Module["asm"]["_update"].apply(null,arguments)});var stackAlloc=Module["stackAlloc"]=(function(){return Module["asm"]["stackAlloc"].apply(null,arguments)});var stackRestore=Module["stackRestore"]=(function(){return Module["asm"]["stackRestore"].apply(null,arguments)});var stackSave=Module["stackSave"]=(function(){return Module["asm"]["stackSave"].apply(null,arguments)});var dynCall_vi=Module["dynCall_vi"]=(function(){return Module["asm"]["dynCall_vi"].apply(null,arguments)});Module["asm"]=asm;Module["cwrap"]=cwrap;function ExitStatus(status){this.name="ExitStatus";this.message="Program terminated with exit("+status+")";this.status=status}ExitStatus.prototype=new Error;ExitStatus.prototype.constructor=ExitStatus;var initialStackTop;dependenciesFulfilled=function runCaller(){if(!Module["calledRun"])run();if(!Module["calledRun"])dependenciesFulfilled=runCaller};function run(args){args=args||Module["arguments"];if(runDependencies>0){return}preRun();if(runDependencies>0)return;if(Module["calledRun"])return;function doRun(){if(Module["calledRun"])return;Module["calledRun"]=true;if(ABORT)return;ensureInitRuntime();preMain();if(Module["onRuntimeInitialized"])Module["onRuntimeInitialized"]();postRun()}if(Module["setStatus"]){Module["setStatus"]("Running...");setTimeout((function(){setTimeout((function(){Module["setStatus"]("")}),1);doRun()}),1)}else{doRun()}}Module["run"]=run;function exit(status,implicit){if(implicit&&Module["noExitRuntime"]&&status===0){return}if(Module["noExitRuntime"]){}else{ABORT=true;EXITSTATUS=status;STACKTOP=initialStackTop;exitRuntime();if(Module["onExit"])Module["onExit"](status)}Module["quit"](status,new ExitStatus(status))}function abort(what){if(Module["onAbort"]){Module["onAbort"](what)}if(what!==undefined){out(what);err(what);what=JSON.stringify(what)}else{what=""}ABORT=true;EXITSTATUS=1;throw"abort("+what+"). 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