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- #!/bin/sh
- # Build the .wasm Module first
- # Since we're compiling a side module here, so that we can load it without the
- # runtime cruft, we have to explicitly compile in support for malloc and
- # friends.
- # Note memcpy, memmove and memset are explicitly exported, otherwise they will
- # be eliminated by the SIDE_MODULE=2 setting - not sure why that happens.
- # This NEEDS to be compiled with emscripten 1.38.47. Newer versions mess with
- # malloc and friends and need some more glue code for side modules that I
- # haven't quite worked out yet. If you have any idea how to build a SIDE_MODULE
- # (or STANDALONE_WASM - as seems to be the new deal) with support for malloc,
- # please let me know or file a PR.
- # To install the correct version, issue the following in your emsdk directory:
- # ./emsdk install 1.38.47
- # ./emsdk activate 1.38.47
- # source ./emsdk_env.sh
- # The $EMSCRIPTEN_LIB var needs to point to the correct directory within the sdk
- # that has emmalloc.cpp. This is usually $EMSDK/fastcomp/emscripten/system/lib
- # but it might differ per system. I don't know.
- # There used to be an $EMSCRIPTEN var set by the emsdk_env script that pointed
- # to the correct directory, but this seems to have gone now.
- # In conclusion, emscripten encapsulates everything that I hate about native
- # development :/
- EMSCRIPTEN_LIB=$EMSDK/fastcomp/emscripten/system/lib
- emcc \
- src/wasm/mpeg1.c \
- src/wasm/mp2.c \
- src/wasm/buffer.c \
- $EMSCRIPTEN_LIB/emmalloc.cpp \
- $EMSCRIPTEN_LIB/libc/musl/src/string/memcpy.c \
- $EMSCRIPTEN_LIB/libc/musl/src/string/memmove.c \
- $EMSCRIPTEN_LIB/libc/musl/src/string/memset.c \
- -s WASM=1 \
- -s SIDE_MODULE=2 \
- -s TOTAL_STACK=5242880\
- -s USE_PTHREADS=0 \
- -s LEGALIZE_JS_FFI=0\
- -s NO_FILESYSTEM=1 \
- -s DEFAULT_LIBRARY_FUNCS_TO_INCLUDE="[]" \
- -s "EXPORTED_FUNCTIONS=[
- '_memcpy',
- '_memmove',
- '_memset',
- '_mpeg1_decoder_create',
- '_mpeg1_decoder_destroy',
- '_mpeg1_decoder_get_write_ptr',
- '_mpeg1_decoder_get_index',
- '_mpeg1_decoder_set_index',
- '_mpeg1_decoder_did_write',
- '_mpeg1_decoder_has_sequence_header',
- '_mpeg1_decoder_get_frame_rate',
- '_mpeg1_decoder_get_coded_size',
- '_mpeg1_decoder_get_width',
- '_mpeg1_decoder_get_height',
- '_mpeg1_decoder_get_y_ptr',
- '_mpeg1_decoder_get_cr_ptr',
- '_mpeg1_decoder_get_cb_ptr',
- '_mpeg1_decoder_decode',
- '_mp2_decoder_create',
- '_mp2_decoder_destroy',
- '_mp2_decoder_get_write_ptr',
- '_mp2_decoder_get_index',
- '_mp2_decoder_set_index',
- '_mp2_decoder_did_write',
- '_mp2_decoder_get_left_channel_ptr',
- '_mp2_decoder_get_right_channel_ptr',
- '_mp2_decoder_get_sample_rate',
- '_mp2_decoder_decode']" \
- -O3 \
- -o jsmpeg.wasm
- # Concat all .js sources
- cat \
- src/jsmpeg.js \
- src/video-element.js \
- src/player.js \
- src/buffer.js \
- src/ajax.js \
- src/fetch.js \
- src/ajax-progressive.js \
- src/websocket.js \
- src/ts.js \
- src/decoder.js \
- src/mpeg1.js \
- src/mpeg1-wasm.js \
- src/mp2.js \
- src/mp2-wasm.js \
- src/webgl.js \
- src/canvas2d.js \
- src/webaudio.js \
- src/wasm-module.js \
- > jsmpeg.js
- # Append the .wasm module to the .js source as base64 string
- echo "JSMpeg.WASM_BINARY_INLINED='$(base64 -w 0 jsmpeg.wasm)';" \
- >> jsmpeg.js
- # Minify
- uglifyjs jsmpeg.js -o jsmpeg.min.js
- # Cleanup
- rm jsmpeg.js
- rm jsmpeg.wasm
|
