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https://github.com/webmproject/libwebp.git
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8bf76fe0c8
The object WebPIDecoder is available to store the
decoding state. The flow is typically:
WebPIDecoder* const idec = WebPINew(mode);
while (has_more_data) {
// ... (get additional data)
status = WebPIAppend(idec, new_data, new_data_size);
if (status != VP8_STATUS_SUSPENDED ||
break;
}
// The above call decodes the current available buffer.
// Part of the image can now be refreshed by calling to
// WebPIDecGetRGB()/WebPIDecGetYUV() etc.
}
WebPIDelete(idec);
Doing so, one can try and decode new macroblocks everytime fresh
bytes are available.
There's two operating modes: either appending fresh bytes, or
updating the whole buffer with additional data in the end.
The latter requires less memcpy()'s
main patch by Somnath Banerjee (somnath at google.com)
Change-Id: Ie81cbd0b50f175743af06b1f964de838b9a10a4a
70 lines
2.4 KiB
Plaintext
70 lines
2.4 KiB
Plaintext
# This makefile is a simpler alternative to the autoconf-based build
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# system, for simple local building of the libraries and tools.
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# It will not install the libraries system-wide, but just create the 'cwebp'
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# and 'dwebp' tools in the examples/ directory, along with the static
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# library 'src/libwebp.a'.
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#
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# To build the library and examples, use:
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# make -f makefile.unix
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# from this top directory.
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#### Customizable part ####
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# These flag assume you have libpng and libjpeg installed. If not, either
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# follow below install instructions or just comment out the next lines.
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EXTRA_FLAGS= -DWEBP_HAVE_PNG -DWEBP_HAVE_JPEG
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EXTRA_LIBS= -lpng -ljpeg
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ifeq ("$(HOSTTYPE)", "intel-mac")
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EXTRA_FLAGS += -I/opt/local/include
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EXTRA_LIBS += -L/opt/local/lib
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endif
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# To install libraries on Mac OS X:
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# 1. Install MacPorts (http://www.macports.org/install.php)
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# 2. Run "sudo port install jpeg"
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# 3. Run "sudo port install libpng"
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# To install libraries on Linux:
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# 1. Run "sudo apt-get install libjpeg62-dev"
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# 2. Run "sudo apt-get install libpng12-dev"
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# Uncomment for build for 32bit platform
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# Alternatively, you can just use the command
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# 'make -f makefile.unix EXTRA_FLAGS=-m32' to that effect.
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# EXTRA_FLAGS= -m32
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#### Nothing should normally be changed below this line ####
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CC = gcc -Isrc/ -Iexamples/ -Wall
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CFLAGS = -O3 -DNDEBUG $(EXTRA_FLAGS)
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LDFLAGS = src/libwebp.a $(EXTRA_LIBS) -lm
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OBJS = src/enc/webpenc.o src/enc/bit_writer.o src/enc/syntax.o \
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src/enc/dsp.o src/enc/tree.o src/enc/config.o src/enc/frame.o \
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src/enc/quant.o src/enc/iterator.o src/enc/analysis.o \
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src/enc/cost.o src/enc/picture.o src/enc/filter.o \
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src/dec/bits.o src/dec/dsp.o src/dec/frame.o src/dec/webp.o \
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src/dec/quant.o src/dec/tree.o src/dec/vp8.o src/dec/yuv.o \
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src/dec/idec.o
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HDRS = src/webp/encode.h src/enc/vp8enci.h src/enc/bit_writer.h \
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src/enc/cost.h src/dec/bits.h src/dec/vp8i.h src/dec/yuv.h
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OUTPUT = examples/cwebp examples/dwebp src/libwebp.a
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all:ex
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.c.o: $(HDRS)
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$(CC) $(CFLAGS) -c $< -o $@
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libwebp.a: $(OBJS) $(HDRS)
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ar r src/libwebp.a $(OBJS)
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ex: examples/cwebp.o examples/dwebp.o libwebp.a
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$(CC) -o examples/cwebp examples/cwebp.o $(LDFLAGS)
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$(CC) -o examples/dwebp examples/dwebp.o $(LDFLAGS)
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clean:
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rm -f ${OUTPUT} *~ \
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src/enc/*.o src/enc/*~ \
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src/dec/*.o src/dec/*~ \
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examples/*.o examples/*~
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